diff --git a/dtd/BITS-embedded-index2.ent b/dtd/BITS-embedded-index2.ent
new file mode 100644
index 0000000..7e27aaf
--- /dev/null
+++ b/dtd/BITS-embedded-index2.ent
@@ -0,0 +1,308 @@
+<!-- ============================================================= -->
+<!--  MODULE:    BITS Embedded Index Element Module                -->
+<!--  VERSION:   BITS 2.0                                          -->
+<!--  DATE:      June 2015                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD BITS Embedded Index Element Module v2.0 20151225//EN"
+Delivered as file "BITS-embedded-index2.ent"                       -->
+<!-- ============================================================= -->
+
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Book Interchange Tag Suite                        -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the index terms to be embedded into the   -->
+<!--             narrative of a document so that an Index can be   -->
+<!--             created programmatically.                         -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created as a superset customization  -->
+<!--             of the ANSI/NISO JATS Z39.96-2012 Version 1.0     -->
+<!--             Journal Article Tag Set.                          -->
+<!--                                                               -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of books or book-like        -->
+<!--             material for archiving and transferring           -->
+<!--             such material between archives or they may create -->
+<!--             a custom XML DTD from the BITS Suite for          -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and new DTD-specific customization   -->
+<!--             modules to redefine the many Parameter Entities.  -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the BITS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Book Interchange Tag Suite (BITS).     -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Book Interchange Tag Suite       -->
+<!--                    (BITS)."                                   -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             April 2012                                        -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the National      -->
+<!--             National Center for Biotechnology Information     -->
+<!--             (NCBI), a center of the US National Library of    -->
+<!--             Medicine (NLM).                                   -->
+<!--                                                               -->
+<!--             The BITS Book Interchange DTD is built from the   -->
+<!--             Journal Archiving and Interchange DTD of the      -->
+<!--             ANSI/NISO Journal Article Tag Suite (JATS)        -->
+<!--             Version 1.1d1 (Z39.96-2015).                      -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 bits@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+    =============================================================
+     BITS Version 2.0                (DAL/BTU) v2.0  (2015-12-25)
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, and BITS modified to use
+     the most recent version. No other changes to BITS were made.
+ 
+  3. BITS remained version "2.0" but becomes "v2.0 20151225"
+     JATS became version "1.1" and "v1.1 20151215"
+
+    =============================================================
+     BITS Version 2.0                (DAL/BTU) v2.0  (2015-03-15)
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-03-01)
+
+     BITS was modified, based on user feedback collected in 2014 
+     and January/February 2015, according to the decisions
+     made by the BITS Working Group. This DTD represents current 
+     BITS and an interim version of the non-normative JATS DTD 
+     Suite (version 1.1), as an indication to JATS users of 
+     the decisions that have been made by the JATS Standing
+     Committee. 
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+
+  2. BITS became version "2.0" and   "v2.0 20150630"
+     JATS became version "1.1" and "v1.1 20150301"
+
+     =============================================================
+     BITS Version 1.1                (DAL/BTU) v1.1    (2014-09-30)
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2  (2014-09-30)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  1. BITS became version "1.1" and   "v1.1 20140930//EN"
+     JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+     =============================================================
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    INDEX-TERM ATTRIBUTES                      -->
+<!--                    Attribute list for <index-term> element.
+                          The attribute index-type names
+                        the specific indexes in which this term
+                        should be used. Contains an index name or
+                        series of index names.                     -->
+<!ENTITY % index-term-atts
+           "%jats-common-atts;
+             index-type NMTOKENS                          #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    INDEX-TERM RANGE END ATTRIBUTES            -->
+<!--                    Attribute list for <index-term-range-end>
+                        element.                                   -->
+<!ENTITY % index-term-range-end-atts
+           "%jats-common-atts;
+             rid        IDREF                             #REQUIRED" >
+
+
+<!--                    SEE ATTRIBUTES                             -->
+<!--                    Attribute list for <see> element.          -->
+<!ENTITY % see-atts
+           "%jats-common-atts;
+             rid        IDREFS                            #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SEE-ALSO ATTRIBUTES                        -->
+<!--                    Attribute list for <see-also> element.     -->
+<!ENTITY % see-also-atts
+           "%jats-common-atts;
+             rid        IDREFS                            #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    INDEX ELEMENTS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    INDEX TERM MODEL                           -->
+<!--                    Content model for the embedded index term
+                        <index-term> element.                      -->
+<!ENTITY % index-term-model
+                        "(term,
+                          (index-term | (see | see-also)* ) )"       >
+
+
+<!--                    INDEX TERM                                 -->
+<!--                    The index term to be embedded into the
+                        narrative of a document so that an Index
+                        can be created programmatically. An
+                        <index-term> is either a single target point
+                        or the start of an index range. When it is the
+                        start of a range, an @id attribute is
+                        required, so that the <index-term-range-end>
+                        element can point to the start of the range.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=index-term
+                                                                   -->
+<!ELEMENT index-term    %index-term-model;                           >
+<!ATTLIST index-term
+            %index-term-atts;                                        >
+
+
+<!--                    INDEX TERM RANGE END MODEL                 -->
+<!--                    Content model for the embedded index term
+                        <index-term> element.                      -->
+<!ENTITY % index-term-range-end-model
+                        "EMPTY"                                      >
+
+
+<!--                    INDEX TERM RANGE END                       -->
+<!--                    An index term embedded into the narrative
+                        of a document may be either a single point
+                        target or the start of a range. When the
+                        <index-term> is the start of a range, the
+                        @rid attribute of an <index-term-range-end>
+                        must point to the @id of the <index-term>.
+                        Remarks: This is an EMPTY element, since all
+                        the information naming the index term is
+                        already present in the <index-term> element
+                        to which this element points.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=index-term-range-end
+                                                                   -->
+<!ELEMENT index-term-range-end
+                        %index-term-range-end-model;                 >
+<!ATTLIST index-term-range-end
+            %index-term-range-end-atts;                              >
+
+
+<!--                    SEE ELEMENTS                               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <see> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % see-elements
+                        "%simple-phrase; | %block-math.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!--                    SEE                                        -->
+<!--                    Used in an embedded index entry to hold
+                        preferred terms that make "See" references
+                        in a generated index.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=see
+                                                                   -->
+<!ELEMENT see           (#PCDATA %see-elements;)*                    >
+<!ATTLIST see
+            %see-atts;                                               >
+
+
+<!--                    SEE-ALSO ELEMENTS                          -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <see-also> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % see-also-elements
+                        "%simple-phrase; | %block-math.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!--                    SEE-ALSO TERM                              -->
+<!--                    Used in an embedded index entry to hold
+                        preferred terms that make "See Also"
+                        references in a generated index.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=see-also
+                                                                   -->
+<!ELEMENT see-also      (#PCDATA %see-also-elements;)*               >
+<!ATTLIST see-also
+            %see-also-atts;                                          >
+
+
+<!-- ================== End BITS Embedded Index Elements ========= -->
+
diff --git a/dtd/BITS-question-answer2.ent b/dtd/BITS-question-answer2.ent
new file mode 100644
index 0000000..b92a958
--- /dev/null
+++ b/dtd/BITS-question-answer2.ent
@@ -0,0 +1,531 @@
+<!-- ============================================================= -->
+<!--  MODULE:    BITS Question and Answer Module                   -->
+<!--  DATE:      June 2015                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD BITS Question and Answer Module v2.0 20151225//EN"
+Delivered as file "BITS-question-answer2.ent"                      -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Book Interchange Tag Suite                        -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines a model for questions, sets of questions, -->
+<!--             and answers. This is a very basic model, expected -->
+<!--             to be extended. NOTE: This is NOT a model for a   -->
+<!--             quiz, test, or exam; such a containing model      -->
+<!--             could be built using sections and the questions   -->
+<!--             answers defined in this module.                   -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created as a superset customization  -->
+<!--             of the ANSI/NISO JATS Z39.96-2012 Version 1.0     -->
+<!--             Journal Article Tag Set.                          -->
+<!--                                                               -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of books or book-like        -->
+<!--             material for archiving and transferring           -->
+<!--             such material between archives or they may create -->
+<!--             a custom XML DTD from the BITS Suite for          -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and new DTD-specific customization   -->
+<!--             modules to redefine the many Parameter Entities.  -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the BITS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Book Interchange Tag Suite (BITS).     -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Book Interchange Tag Suite       -->
+<!--                    (BITS)."                                   -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             May 2013                                          -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the National      -->
+<!--             National Center for Biotechnology Information     -->
+<!--             (NCBI), a center of the US National Library of    -->
+<!--             Medicine (NLM).                                   -->
+<!--                                                               -->
+<!--             The BITS Book Interchange DTD is built from the   -->
+<!--             Journal Archiving and Interchange DTD of the      -->
+<!--             ANSI/NISO Journal Article Tag Suite (JATS)        -->
+<!--             Version 1.1d1 (Z39.96-2015).                      -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 bits@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+     =============================================================
+     BITS Version 2.0                (DAL/BTU) v2.0  (2015-12-25)
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, and BITS modified to use
+     the most recent version. No other changes to BITS were made.
+ 
+ 12. BITS remained version "2.0" but becomes "v2.0 20151225"
+     JATS became version "1.1" and "v1.1 20151215"
+
+   =============================================================
+     BITS Version 2.0                (DAL/BTU) v2.0    (2015-03-15)
+     JATS Version 1.1                (DAL/BTU) v1.1    (2015-03-01)
+
+     BITS was modified, based on user feedback collected in 2014 
+     and January/February 2015, according to the decisions
+     made by the BITS Working Group. This DTD represents current 
+     BITS and an interim version of the non-normative JATS DTD 
+     Suite (version 1.1), as an indication to JATS users of 
+     the decisions that have been made by the JATS Standing
+     Committee. 
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+
+ 11. TITLE/SUBTITLE/ALT-TIT/E ETC. - Some of the question/answer
+     components could take subtitles and alt-titles as well as titles,
+     but all could not. Regularized them to include all title
+     types if a title was possible.
+
+ 10. EXPLANATION - was given a new section-level model similar
+     to that for <answer>.
+
+  9. ANSWER-SPECIFIC PARAGRAPH-LEVEL OBJECTS
+     Created a new PE (answer-para-level) to prohibit 
+     <explanation> at the paragraph level inside
+     <answer>, because that created DTD determinism problems.
+     Rewrote <answer> model to use this PE.
+
+  8. QUESTION MODEL - changed the model for <question> to:
+      - call all the components of sec-opt-title-model
+        rather than calling the grouping PE
+      - Add new element <option>, which is used for multiple 
+        choice questions (instead of <answer>) 
+
+  7. ANSWER/QUESTION ATTRIBUTES
+      - Removed @correct (yes | no) from <answer> and from
+        <answer-set>, because, by definition, an <answer> 
+        is correct. The <option> element may now be marked 
+        with a @correct attribute ('yes' or 'no').
+      -Removed @answer-type from <answer>, since this is 
+       really about the question, not the answer.
+     - Added new attribute @question-response-type to
+       <question>, which takes the old values for @answer-type
+       (multiple choice, short answer, essay, etc.) 
+
+  6. XML:LANG ATTRIBUTE - Added @xml:lang to the attributes lists
+     of <question-wrap> and <question-wrap-group>. 
+
+  5. EXPLANATION - Added @rid to <explanation> since these can
+     now float in the text as answers can. 
+
+  4. QUESTION-PREAMBLE - Added new element to hold setup/
+     preamble information, when the setup is shared by several 
+     questions, for example, a diagram is shown and the questions
+     are similar to "What is angle a?". This preamble is part of
+     a <question-wrap-group> that contains the preamble/setup 
+     (<question-preamble>) and several questions
+     (<question-wrap>).
+
+  3. QUESTION-WRAP-GROUP - Added new element <question-wrap-group>
+     to hold a question setup/preamble (<question-preamble>)
+     and two or more <question-wrap>s based on that preamble.
+
+  2. BITS became version "2.0" and   "v2.0 20150630"
+     JATS became version "1.1" and "v1.1 20150301"
+
+     =============================================================
+     BITS Version 1.1                (DAL/BTU) v1.1    (2014-09-30)
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2  (2014-09-30)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  1. BITS became version "1.1" and   "v1.1 20140930//EN"
+     JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+     =============================================================
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE VALUES    -->
+<!-- ============================================================= -->
+
+
+<!--                    TYPES OF ANSWERS                           -->
+<!--                    Used to name the type of question or
+                        question set.                              -->
+<!ENTITY % answer-types "essay | fill-in-the-blank | multi-select |
+                         multiple-choice | short-answer |
+                         true-false"                                 >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    QUESTION ATTRIBUTES                        -->
+<!--                    Attributes for the <question> element      -->
+<!ENTITY % question-atts
+           "%jats-common-atts;
+             question-response-type
+                        (%answer-types;)                  #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    QUESTION PREAMBLE ATTRIBUTES               -->
+<!--                    Attributes for the <question-preamble> 
+                                                           element -->
+<!ENTITY % question-preamble-atts
+           "%jats-common-atts;
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    QUESTION WRAP ATTRIBUTES                   -->
+<!--                    Attributes for the <question-wrap> element -->
+<!ENTITY % question-wrap-atts
+           "%jats-common-atts;
+             audience   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    QUESTION WRAP GROUP ATTRIBUTES             -->
+<!--                    Attributes for the <question-wrap-group> 
+                        element                                    -->
+<!ENTITY % question-wrap-group-atts
+           "%jats-common-atts;
+             audience   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ANSWER ATTRIBUTES                          -->
+<!--                    Attributes for the <answer> element        -->
+<!ENTITY % answer-atts
+           "%jats-common-atts;
+             pointer-to-question
+                        IDREFS                            #REQUIRED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ANSWER SET ATTRIBUTES                      -->
+<!--                    Attributes for the <answer-set> element    -->
+<!ENTITY % answer-set-atts
+           "%jats-common-atts;
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    EXPLANATION ATTRIBUTES                     -->
+<!--                    Attributes for the <explanation> element   -->
+<!ENTITY % explanation-atts
+           "%jats-common-atts;
+             pointer-to-explained
+                        IDREFS                            #REQUIRED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    OPTION ATTRIBUTES                          -->
+<!--                    Attributes for the <option> element        -->
+<!ENTITY % option-atts  
+           "%jats-common-atts;
+             correct    (yes | no)                        #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    QUESTION ELEMENTS                          -->
+<!-- ============================================================= -->
+
+
+<!--                    QUESTION MODEL                             -->
+<!--                    Content model for the <question> element.  -->
+<!ENTITY % question-model
+                        "((%id.class;)*, sec-meta?,
+                         label?, title?, subtitle*, alt-title*,
+                         ( (%sec-level;)+ |
+                           ( (%para-level;)+, (%sec-level;)* ) ),
+                         (%option.class;)*,
+                         (%sec-back-matter-mix;)* )"                 > 
+ 
+
+<!--                    QUESTION                                   -->
+<!--                    A question (request for an answer) used in
+                        the text or as part of a quiz, exam, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=question
+                                                                   -->
+<!ELEMENT  question     %question-model;                             >
+<!ATTLIST  question
+            %question-atts;                                          >
+
+
+
+<!--                    QUESTION WRAP MODEL                        -->
+<!--                    Content model for the <question-wrap>
+                        element.                                   -->
+<!ENTITY % question-wrap-model
+                        "((%id.class;)*, question,
+                          (answer | answer-set)?, explanation*)"     >
+
+
+<!--                    QUESTION WRAP                              -->
+<!--                    Used to model a Question/Answer scheme. These
+                        questions may be used, for example, for the
+                        Continuing Medical Education articles in a
+                        book of articles. The model allows for
+                        simple questions followed by their
+                        corresponding answers or for a multiple
+                        choice setup, where questions are followed
+                        by multiple alternative answers (<option>s), 
+                        along with the correct answer and an 
+                        explanation.
+                        Note: This is not the model for a full
+                        quiz, test, exam, etc., but such a model
+                        could be built using these components for
+                        the question/answers.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=question-wrap
+                                                                   -->
+<!ELEMENT  question-wrap
+                        %question-wrap-model;                        >
+<!ATTLIST  question-wrap
+            %question-wrap-atts;                                     >
+
+
+<!--                    QUESTION WRAP GROUP MODEL                  -->
+<!--                    Content model for the <question-wrap-group>
+                        element.                                   -->
+<!ENTITY % question-wrap-group-model
+                        "((%id.class;)*,
+                          label?, title?, subtitle*, alt-title*,
+                          question-preamble?, 
+                          (%question-wrap.class;)+ )"                >
+
+
+<!--                    QUESTION WRAP GROUP                       -->
+<!--                    A container element used to hold a group of
+                        <question-wrap> elements, for example, when
+                        all the questions share a common preamble 
+                        (setup).
+                        Note: This is not the model for a full
+                        quiz, test, exam, etc., but such a model
+                        could be built using these components for
+                        the question/answers.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=question-wrap-group
+                                                                   -->
+<!ELEMENT  question-wrap-group
+                        %question-wrap-group-model;                  >
+<!ATTLIST  question-wrap-group
+            %question-wrap-group-atts;                               >
+
+
+<!--                    QUESTION PREAMBLE MODEL                    -->
+<!--                    Content model for the <question-preamble>
+                        element.                                   -->
+<!ENTITY % question-preamble-model
+                        "((%id.class;)*,
+                          label?, title?, subtitle*, alt-title*,
+                          (%para-level;)*, (%sec.class;)*  )"        >
+
+
+<!--                    QUESTION PREAMBLE                          -->
+<!--                    A container element used setup/
+                        preamble information when the setup is shared 
+                        by several questions, for example, a diagram 
+                        is shown and the questions are similar to 
+                        "What is angle a?".
+                        Remarks: The preamble information is part of
+                        a <question-wrap-group> that contains the 
+                        preamble/setup (<question-preamble>) and 
+                        several questions (tagged as <question-wrap>s).
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=question-preamble
+                                                                   -->
+<!ELEMENT  question-preamble
+                        %question-preamble-model;                    >
+<!ATTLIST  question-preamble
+            %question-preamble-atts;                                 >
+
+
+
+<!-- ============================================================= -->
+<!--                    ANSWER/EXPLANATION ELEMENTS                -->
+<!-- ============================================================= -->
+
+
+<!--                    ANSWER MODEL                               -->
+<!--                    Content model for the <answer> element.    -->
+<!ENTITY % answer-model
+                        "((%id.class;)*,
+                          label?, title?, subtitle*, alt-title*,
+                          ( (%sec-level;)+ |
+                            ( (%answer-para-level;)+, 
+                              (%sec-level;)* ) ),
+                          (%sec-back-matter-mix;)*,
+                           explanation*)"                           >
+
+
+<!--                    ANSWER ELEMENTS                            -->
+<!--                    An answer to a question
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=answer
+                                                                   -->
+<!ELEMENT  answer       %answer-model;                               >
+<!ATTLIST  answer
+            %answer-atts;                                            >
+
+
+<!--                    ANSWER SET MODEL                           -->
+<!--                    Content model for the <answer-set> element.-->
+<!ENTITY % answer-set-model
+                        "((%id.class;)*,
+                          label?, title?, subtitle*, alt-title*,
+                          (answer | %just-para.class; |
+                           explanation)+)"                           >
+
+
+<!--                    ANSWER SET                                 -->
+<!--                    A series of answers, typically in response
+                        to a question.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=answer-set
+                                                                   -->
+<!ELEMENT  answer-set   %answer-set-model;                           >
+<!ATTLIST  answer-set
+            %answer-set-atts;                                        >
+
+
+<!--                    EXPLANATION MODEL                          -->
+<!--                    Content model for the <answer-set> element.-->
+<!ENTITY % explanation-model
+                        "((%id.class;)*,
+                          label?, title?, subtitle*, alt-title*,
+                          ( (%sec-level;)+ |
+                            ( (%answer-para-level;)+, 
+                              (%sec-level;)* ) ),
+                          (%sec-back-matter-mix;)*)"                 >
+
+
+<!--                    EXPLANATION                                -->
+<!--                    A description of a question/answer or of just
+                        an answer or answer set. The explanation
+                        may describe, for example, why this
+                        particular answer is incorrect, or where in
+                        the text the material for this question
+                        can be found, et al.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=explanation
+                                                                   -->
+<!ELEMENT  explanation  %explanation-model;                          >
+<!ATTLIST  explanation
+            %explanation-atts;                                       >
+
+
+<!--                    OPTION MODEL                               -->
+<!--                    Content model for the <option> element.    -->
+<!ENTITY % option-model 
+                        "((%id.class;)*,
+                          label?, title?, subtitle*, alt-title*,
+                          ( (%sec-level;)+ |
+                            ( (%answer-para-level;)+, 
+                              (%sec-level;)* ) ),
+                          (%sec-back-matter-mix;)*,
+                           explanation*)"                           >
+
+
+<!--                    OPTION ELEMENTS                            -->
+<!--                    One of the possible answer-choices for a 
+                        multiple-choice question. An attribute can be
+                        used to identify options which are correct.
+                        Details at:
+                        http://jats.nlm.nih.gov/extensions/bits/2.0/index.html?elem=option
+                                                                   -->
+<!ELEMENT  option       %option-model;                               >
+<!ATTLIST  option
+            %option-atts;                                            >
+
+
+<!-- ================== End BITS Question and Answer Module ====== -->
+
diff --git a/dtd/Docsum_3_0.dtd b/dtd/Docsum_3_0.dtd
new file mode 100644
index 0000000..43a18d0
--- /dev/null
+++ b/dtd/Docsum_3_0.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 07/01/2008 23:08:13
+     ============================================ -->
+
+<!-- Docsum_3_0.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % Docsum_3_0_module PUBLIC "-//NCBI//Docsum 3 0 Module//EN" "Docsum_3_0.mod.dtd">
+%Docsum_3_0_module;
diff --git a/dtd/Docsum_3_0.mod.dtd b/dtd/Docsum_3_0.mod.dtd
new file mode 100644
index 0000000..64a4549
--- /dev/null
+++ b/dtd/Docsum_3_0.mod.dtd
@@ -0,0 +1,1054 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 07/01/2008 23:08:13
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "Docsum-3-0"
+================================================= -->
+
+<!--
+ ============================================
+ ::DATATOOL:: Generated from "docsum_3.0.xsd"
+ ::DATATOOL:: by application DATATOOL version 1.8.6
+ ::DATATOOL:: on 05/02/2008 10:59:28
+ ============================================
+ edited with XMLSPY v5 rel. 4 U (http://www.xmlspy.com) by Michael Kholodov (National Library of Medicine) 
+ edited with XMLSpy v2005 rel. 3 U (http://www.altova.com) by Michael Feolo (NCBI/NLM/NIH) 
+-->
+
+
+<!ELEMENT Assay (
+        Assay_attlist, 
+        Assay_method, 
+        Assay_taxonomy, 
+        Assay_strains?, 
+        Assay_comment?, 
+        Assay_citation?)>
+
+<!ELEMENT Assay_attlist (
+        Assay_attlist_handle?, 
+        Assay_attlist_batch?, 
+        Assay_attlist_batchId?, 
+        Assay_attlist_batchType?, 
+        Assay_attlist_molType?, 
+        Assay_attlist_sampleSize?, 
+        Assay_attlist_population?, 
+        Assay_attlist_linkoutUrl?)>
+
+<!ELEMENT Assay_attlist_handle (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batch (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batchId (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_batchType %ENUM;>
+<!ATTLIST Assay_attlist_batchType value (
+        snpassay |
+        validation |
+        doublehit
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_molType %ENUM;>
+<!ATTLIST Assay_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_population (#PCDATA)>
+
+<!ELEMENT Assay_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Assay_method (
+        Assay_method_eMethod?)>
+
+<!ELEMENT Assay_method_eMethod (
+        Assay_method_eMethod_attlist, 
+        Assay_method_eMethod_exception)>
+
+<!ELEMENT Assay_method_eMethod_attlist (
+        Assay_method_eMethod_attlist_name?, 
+        Assay_method_eMethod_attlist_id?)>
+
+<!--Submitters method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_name (#PCDATA)>
+
+<!--dbSNP method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_id (#PCDATA)>
+
+<!--description of deviation from/addition to given method -->
+<!ELEMENT Assay_method_eMethod_exception (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy (
+        Assay_taxonomy_attlist, 
+        Assay_taxonomy_taxonomy)>
+
+<!ELEMENT Assay_taxonomy_attlist (
+        Assay_taxonomy_attlist_id, 
+        Assay_taxonomy_attlist_organism?)>
+
+<!--NCBI taxonomy ID for variation -->
+<!ELEMENT Assay_taxonomy_attlist_id (%INTEGER;)>
+
+<!ELEMENT Assay_taxonomy_attlist_organism (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy_taxonomy EMPTY>
+
+<!ELEMENT Assay_strains (Assay_strains_E*)>
+
+
+<!ELEMENT Assay_strains_E (#PCDATA)>
+
+<!ELEMENT Assay_comment (#PCDATA)>
+
+<!ELEMENT Assay_citation (Assay_citation_E*)>
+
+
+<!ELEMENT Assay_citation_E (#PCDATA)>
+
+<!--A collection of genome sequence records (curated gene regions (NG's), contigs (NWNT's)  and chromosomes (NC/AC's) produced by a genome sequence project. Structure is populated from ContigInfo tables. -->
+<!ELEMENT Assembly (
+        Assembly_attlist, 
+        Assembly_component?, 
+        Assembly_snpStat)>
+
+<!ELEMENT Assembly_attlist (
+        Assembly_attlist_dbSnpBuild, 
+        Assembly_attlist_genomeBuild, 
+        Assembly_attlist_groupLabel?, 
+        Assembly_attlist_assemblySource?, 
+        Assembly_attlist_current?, 
+        Assembly_attlist_reference?)>
+
+<!--dbSNP build number defining the rsid set aligned to this assembly -->
+<!ELEMENT Assembly_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--assembly build number with possible 'subbuild' version numbers to reflect updates in gene annotation (human e.g. 34_3, 35_1, 36_1) -->
+<!ELEMENT Assembly_attlist_genomeBuild (#PCDATA)>
+
+<!--High-level classification of the assembly to distinguish reference projects from alternate solutions. GroupLabel field from organism/build-specific ContigInfo tables. "reference" is occasionally used as the preferred assembly; standards will converge as additional organism genome projects are finished. Note that some organism assembly names include extended characters like '~' and '/' that may be incompatible with OS filename conventions. -->
+<!ELEMENT Assembly_attlist_groupLabel (#PCDATA)>
+
+<!--Name of the group(s) or organization(s) that generated the assembly -->
+<!ELEMENT Assembly_attlist_assemblySource (#PCDATA)>
+
+<!--Marks the current genomic assembly -->
+<!ELEMENT Assembly_attlist_current EMPTY>
+<!ATTLIST Assembly_attlist_current value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_attlist_reference EMPTY>
+<!ATTLIST Assembly_attlist_reference value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_component (Component*)>
+
+<!ELEMENT Assembly_snpStat (
+        Assembly_snpStat_attlist, 
+        Assembly_snpStat_snpStat)>
+
+<!ELEMENT Assembly_snpStat_attlist (
+        Assembly_snpStat_attlist_mapWeight, 
+        Assembly_snpStat_attlist_chromCount?, 
+        Assembly_snpStat_attlist_placedContigCount?, 
+        Assembly_snpStat_attlist_unplacedContigCount?, 
+        Assembly_snpStat_attlist_seqlocCount?, 
+        Assembly_snpStat_attlist_hapCount?)>
+
+<!--summary measure of placement precision in the assembly -->
+<!ELEMENT Assembly_snpStat_attlist_mapWeight %ENUM;>
+<!ATTLIST Assembly_snpStat_attlist_mapWeight value (
+        unmapped |
+        unique-in-contig |
+        two-hits-in-contig |
+        less-10-hits |
+        multiple-hits
+        ) #REQUIRED >
+
+
+<!--number of distinct chromosomes in the mapset -->
+<!ELEMENT Assembly_snpStat_attlist_chromCount (%INTEGER;)>
+
+<!--number of distinct contigs [ gi | accession[.version] ] in the mapset -->
+<!ELEMENT Assembly_snpStat_attlist_placedContigCount (%INTEGER;)>
+
+<!--number of sequence postions to a contig with unknown chromosomal assignment -->
+<!ELEMENT Assembly_snpStat_attlist_unplacedContigCount (%INTEGER;)>
+
+<!--total number of sequence positions in the mapset -->
+<!ELEMENT Assembly_snpStat_attlist_seqlocCount (%INTEGER;)>
+
+<!--Number of hits to alternative genomic haplotypes (e.g. HLA DR region, KIR, or pseudo-autosomal regions like PAR) within the assembly mapset. Note that positions on haplotypes defined in other assemblies (a different assembly_group_label value) will not be counted in this value. -->
+<!ELEMENT Assembly_snpStat_attlist_hapCount (%INTEGER;)>
+
+<!ELEMENT Assembly_snpStat_snpStat EMPTY>
+
+<!--URL value from dbSNP_main.BaseURL links table. attributes provide context information and URL id that is referenced within individual refSNP objects. -->
+<!ELEMENT BaseURL (
+        BaseURL_attlist, 
+        BaseURL_baseURL)>
+
+<!ELEMENT BaseURL_attlist (
+        BaseURL_attlist_urlId?, 
+        BaseURL_attlist_resourceName?, 
+        BaseURL_attlist_resourceId?)>
+
+<!--Resource identifier from dbSNP_main.baseURL. -->
+<!ELEMENT BaseURL_attlist_urlId (%INTEGER;)>
+
+<!--Name of linked resource -->
+<!ELEMENT BaseURL_attlist_resourceName (#PCDATA)>
+
+<!--identifier expected by resource for URL -->
+<!ELEMENT BaseURL_attlist_resourceId (#PCDATA)>
+
+<!--URL value from dbSNP_main.BaseURL links table. attributes provide context information and URL id that is referenced within individual refSNP objects. -->
+<!ELEMENT BaseURL_baseURL (#PCDATA)>
+
+
+<!ELEMENT Component (
+        Component_attlist, 
+        Component_mapLoc)>
+
+<!ELEMENT Component_attlist (
+        Component_attlist_componentType?, 
+        Component_attlist_ctgId?, 
+        Component_attlist_accession?, 
+        Component_attlist_name?, 
+        Component_attlist_chromosome?, 
+        Component_attlist_start?, 
+        Component_attlist_end?, 
+        Component_attlist_orientation?, 
+        Component_attlist_gi?, 
+        Component_attlist_groupTerm?, 
+        Component_attlist_contigLabel?)>
+
+<!--type of component: chromosome, contig, gene_region, etc. -->
+<!ELEMENT Component_attlist_componentType %ENUM;>
+<!ATTLIST Component_attlist_componentType value (
+        contig |
+        mrna
+        ) #REQUIRED >
+
+
+<!--dbSNP contig_id used to join on contig hit / mapset data to these assembly properties -->
+<!ELEMENT Component_attlist_ctgId (%INTEGER;)>
+
+<!--Accession[.version] for the sequence component -->
+<!ELEMENT Component_attlist_accession (#PCDATA)>
+
+<!--contig name defined as either a submitter local id, element of a whole genome assembly set, or internal NCBI local id -->
+<!ELEMENT Component_attlist_name (#PCDATA)>
+
+<!--Organism appropriate chromosome tag, 'Un' reserved for default case of unplaced components -->
+<!ELEMENT Component_attlist_chromosome (#PCDATA)>
+
+<!--component starting position on the chromosome (base 0 inclusive) -->
+<!ELEMENT Component_attlist_start (%INTEGER;)>
+
+<!--component ending position on the chromosome (base 0 inclusive) -->
+<!ELEMENT Component_attlist_end (%INTEGER;)>
+
+<!--orientation of this component to chromosome, forward (fwd) = 0, reverse (rev) = 1, unknown = NULL in ContigInfo.orient. -->
+<!ELEMENT Component_attlist_orientation %ENUM;>
+<!ATTLIST Component_attlist_orientation value (
+        fwd |
+        rev |
+        unknown
+        ) #REQUIRED >
+
+
+<!--NCBI gi for component sequence (equivalent to accession.version) for nucleotide sequence. -->
+<!ELEMENT Component_attlist_gi (#PCDATA)>
+
+<!--Identifier label for the genome assembly that defines the contigs in this mapset and their placement within the organism genome.  -->
+<!ELEMENT Component_attlist_groupTerm (#PCDATA)>
+
+<!--Display label for component -->
+<!ELEMENT Component_attlist_contigLabel (#PCDATA)>
+
+<!ELEMENT Component_mapLoc (MapLoc*)>
+
+<!--Set of dbSNP refSNP docsums -->
+<!ELEMENT ExchangeSet (
+        ExchangeSet_attlist, 
+        ExchangeSet_sourceDatabase, 
+        ExchangeSet_rs?, 
+        ExchangeSet_assay?, 
+        ExchangeSet_query?, 
+        ExchangeSet_summary, 
+        ExchangeSet_baseURL)>
+
+<!ELEMENT ExchangeSet_attlist (
+        ExchangeSet_attlist_setType?, 
+        ExchangeSet_attlist_setDepth?, 
+        ExchangeSet_attlist_specVersion?, 
+        ExchangeSet_attlist_dbSnpBuild?, 
+        ExchangeSet_attlist_generated?)>
+
+<!--set-type: full dump; from query; single refSNP -->
+<!ELEMENT ExchangeSet_attlist_setType (#PCDATA)>
+
+<!--content depth: brief XML (only refSNP properties and summary subSNP element content); full XML (full refSNP, full subSNP content; all flanking sequences) -->
+<!ELEMENT ExchangeSet_attlist_setDepth (#PCDATA)>
+
+<!--version number of docsum.asn/docsum.dtd specification -->
+<!ELEMENT ExchangeSet_attlist_specVersion (#PCDATA)>
+
+<!--build number of database for this export -->
+<!ELEMENT ExchangeSet_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--Generated date -->
+<!ELEMENT ExchangeSet_attlist_generated (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase (
+        ExchangeSet_sourceDatabase_attlist, 
+        ExchangeSet_sourceDatabase_sourceDatabase)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_attlist (
+        ExchangeSet_sourceDatabase_attlist_taxId, 
+        ExchangeSet_sourceDatabase_attlist_organism, 
+        ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr?, 
+        ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr?)>
+
+<!--NCBI taxonomy ID for variation -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_taxId (%INTEGER;)>
+
+<!--common name for species used as part of database name. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_organism (#PCDATA)>
+
+<!--organism abbreviation used in dbSNP.  -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr (#PCDATA)>
+
+<!--organism abbreviation used within NCBI genome pipeline data dumps. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_sourceDatabase EMPTY>
+
+<!ELEMENT ExchangeSet_rs (Rs*)>
+
+<!ELEMENT ExchangeSet_assay (Assay)>
+
+<!ELEMENT ExchangeSet_query (
+        ExchangeSet_query_attlist, 
+        ExchangeSet_query_query)>
+
+<!ELEMENT ExchangeSet_query_attlist (
+        ExchangeSet_query_attlist_date?, 
+        ExchangeSet_query_attlist_string?)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT ExchangeSet_query_attlist_date (#PCDATA)>
+
+<!--Query terms or search constraints -->
+<!ELEMENT ExchangeSet_query_attlist_string (#PCDATA)>
+
+<!ELEMENT ExchangeSet_query_query EMPTY>
+
+<!ELEMENT ExchangeSet_summary (
+        ExchangeSet_summary_attlist, 
+        ExchangeSet_summary_summary)>
+
+<!ELEMENT ExchangeSet_summary_attlist (
+        ExchangeSet_summary_attlist_numRsIds?, 
+        ExchangeSet_summary_attlist_totalSeqLength?, 
+        ExchangeSet_summary_attlist_numContigHits?, 
+        ExchangeSet_summary_attlist_numGeneHits?, 
+        ExchangeSet_summary_attlist_numGiHits?, 
+        ExchangeSet_summary_attlist_num3dStructs?, 
+        ExchangeSet_summary_attlist_numAlleleFreqs?, 
+        ExchangeSet_summary_attlist_numStsHits?, 
+        ExchangeSet_summary_attlist_numUnigeneCids?)>
+
+<!--Total number of refsnp-ids in this exchange set -->
+<!ELEMENT ExchangeSet_summary_attlist_numRsIds (%INTEGER;)>
+
+<!--Total length of exemplar flanking sequences -->
+<!ELEMENT ExchangeSet_summary_attlist_totalSeqLength (%INTEGER;)>
+
+<!--Total number of contig locations from SNPContigLoc -->
+<!ELEMENT ExchangeSet_summary_attlist_numContigHits (%INTEGER;)>
+
+<!--Total number of locus ids from SNPContigLocusId -->
+<!ELEMENT ExchangeSet_summary_attlist_numGeneHits (%INTEGER;)>
+
+<!--Total number of gi hits from MapLink -->
+<!ELEMENT ExchangeSet_summary_attlist_numGiHits (%INTEGER;)>
+
+<!--Total number of 3D structures from SNP3D -->
+<!ELEMENT ExchangeSet_summary_attlist_num3dStructs (%INTEGER;)>
+
+<!--Total number of allele frequences from SubPopAllele -->
+<!ELEMENT ExchangeSet_summary_attlist_numAlleleFreqs (%INTEGER;)>
+
+<!--Total number of STS hits from SnpInSts -->
+<!ELEMENT ExchangeSet_summary_attlist_numStsHits (%INTEGER;)>
+
+<!--Total number of unigene cluster ids from UnigeneSnp -->
+<!ELEMENT ExchangeSet_summary_attlist_numUnigeneCids (%INTEGER;)>
+
+<!ELEMENT ExchangeSet_summary_summary EMPTY>
+
+<!ELEMENT ExchangeSet_baseURL (BaseURL*)>
+
+<!--functional relationship of SNP (and possibly alleles) to genes at contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx tables. -->
+<!ELEMENT FxnSet (
+        FxnSet_attlist, 
+        FxnSet_fxnSet)>
+
+<!ELEMENT FxnSet_attlist (
+        FxnSet_attlist_geneId?, 
+        FxnSet_attlist_symbol?, 
+        FxnSet_attlist_mrnaAcc?, 
+        FxnSet_attlist_mrnaVer?, 
+        FxnSet_attlist_protAcc?, 
+        FxnSet_attlist_protVer?, 
+        FxnSet_attlist_fxnClass?, 
+        FxnSet_attlist_readingFrame?, 
+        FxnSet_attlist_allele?, 
+        FxnSet_attlist_residue?, 
+        FxnSet_attlist_aaPosition?)>
+
+<!--gene-id of gene as aligned to contig -->
+<!ELEMENT FxnSet_attlist_geneId (%INTEGER;)>
+
+<!--symbol (official if present in Entrez Gene) of gene -->
+<!ELEMENT FxnSet_attlist_symbol (#PCDATA)>
+
+<!--mRNA accession if variation in transcript -->
+<!ELEMENT FxnSet_attlist_mrnaAcc (#PCDATA)>
+
+<!--mRNA sequence version if variation is in transcripot -->
+<!ELEMENT FxnSet_attlist_mrnaVer (%INTEGER;)>
+
+<!--protein accession if variation in protein -->
+<!ELEMENT FxnSet_attlist_protAcc (#PCDATA)>
+
+<!--protein version if variation is in protein -->
+<!ELEMENT FxnSet_attlist_protVer (%INTEGER;)>
+<!--
+variation in region of gene, but not in transcript - deprecated
+								synonymous change	
+								nonsynonymous change - deprecated
+								untranslated region - deprecated
+								splice-site - deprecated
+								contig reference
+								deprecated
+									coding: synonymy unknown
+									In gene segment with null mrna and protein. ex. IGLV4-69. geneId=28784
+									within 3' 0.5kb to a gene.
+									changes to STOP codon.
+									alters codon to make an altered amino acid in protein product.
+									indel snp causing frameshift.
+									3 prime untranslated region
+									5 prime untranslated region
+									3 prime acceptor dinucleotide
+									5 prime donor dinucleotide
+-->
+<!ELEMENT FxnSet_attlist_fxnClass %ENUM;>
+<!ATTLIST FxnSet_attlist_fxnClass value (
+        locus-region |
+        coding-unknown |
+        coding-synonymous |
+        coding-nonsynonymous |
+        mrna-utr |
+        intron |
+        splice-site |
+        reference |
+        coding-exception |
+        synonymy-unknown |
+        gene-segment |
+        near-gene-3 |
+        near-gene-5 |
+        nonsense |
+        missense |
+        frameshift |
+        utr-3 |
+        utr-5 |
+        splice-3 |
+        splice-5
+        ) #REQUIRED >
+
+
+<!ELEMENT FxnSet_attlist_readingFrame (%INTEGER;)>
+
+<!--variation allele: * suffix indicates allele of contig at this location -->
+<!ELEMENT FxnSet_attlist_allele (#PCDATA)>
+
+<!--translated amino acid residue for allele -->
+<!ELEMENT FxnSet_attlist_residue (#PCDATA)>
+
+<!--position of the variant residue in peptide sequence -->
+<!ELEMENT FxnSet_attlist_aaPosition (%INTEGER;)>
+
+<!--functional relationship of SNP (and possibly alleles) to genes at contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx tables. -->
+<!ELEMENT FxnSet_fxnSet EMPTY>
+
+<!--Position of a single hit of a variation on a contig -->
+<!ELEMENT MapLoc (
+        MapLoc_attlist, 
+        MapLoc_fxnSet?)>
+
+<!ELEMENT MapLoc_attlist (
+        MapLoc_attlist_asnFrom, 
+        MapLoc_attlist_asnTo, 
+        MapLoc_attlist_locType, 
+        MapLoc_attlist_alnQuality?, 
+        MapLoc_attlist_orient?, 
+        MapLoc_attlist_physMapInt?, 
+        MapLoc_attlist_leftFlankNeighborPos?, 
+        MapLoc_attlist_rightFlankNeighborPos?, 
+        MapLoc_attlist_leftContigNeighborPos?, 
+        MapLoc_attlist_rightContigNeighborPos?, 
+        MapLoc_attlist_numberOfMismatches?, 
+        MapLoc_attlist_numberOfDeletions?, 
+        MapLoc_attlist_numberOfInsertions?)>
+
+<!--beginning of variation as feature on contig -->
+<!ELEMENT MapLoc_attlist_asnFrom (%INTEGER;)>
+
+<!--end position of variation as feature on contig -->
+<!ELEMENT MapLoc_attlist_asnTo (%INTEGER;)>
+<!--
+defines the seq-loc symbol if asn_from != asn_to
+insertion on contig
+asn-from = asn-to write as 'asn-from'
+deletion on contig
+-->
+<!ELEMENT MapLoc_attlist_locType %ENUM;>
+<!ATTLIST MapLoc_attlist_locType value (
+        insertion |
+        exact |
+        deletion |
+        range-ins |
+        range-exact |
+        range-del
+        ) #REQUIRED >
+
+
+<!--alignment qualiity -->
+<!ELEMENT MapLoc_attlist_alnQuality (%REAL;)>
+
+<!--orientation of refSNP sequence to contig sequence -->
+<!ELEMENT MapLoc_attlist_orient %ENUM;>
+<!ATTLIST MapLoc_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--chromosome position as integer for sorting -->
+<!ELEMENT MapLoc_attlist_physMapInt (%INTEGER;)>
+
+<!--nearest aligned position in 5' flanking sequence of snp -->
+<!ELEMENT MapLoc_attlist_leftFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' flanking sequence of snp  -->
+<!ELEMENT MapLoc_attlist_rightFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 5' contig alignment of snp -->
+<!ELEMENT MapLoc_attlist_leftContigNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' contig alignment of snp -->
+<!ELEMENT MapLoc_attlist_rightContigNeighborPos (%INTEGER;)>
+
+<!--number of Mismatched positions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfMismatches (%INTEGER;)>
+
+<!--number of deletions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfDeletions (%INTEGER;)>
+
+<!--number of insetions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfInsertions (%INTEGER;)>
+
+<!ELEMENT MapLoc_fxnSet (FxnSet*)>
+
+
+<!ELEMENT PrimarySequence (
+        PrimarySequence_attlist, 
+        PrimarySequence_mapLoc)>
+
+<!ELEMENT PrimarySequence_attlist (
+        PrimarySequence_attlist_dbSnpBuild, 
+        PrimarySequence_attlist_gi, 
+        PrimarySequence_attlist_source?, 
+        PrimarySequence_attlist_accession?)>
+
+<!ELEMENT PrimarySequence_attlist_dbSnpBuild (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_gi (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_source %ENUM;>
+<!ATTLIST PrimarySequence_attlist_source value (
+        submitter |
+        blastmb |
+        xm
+        ) #REQUIRED >
+
+
+<!ELEMENT PrimarySequence_attlist_accession (#PCDATA)>
+
+<!ELEMENT PrimarySequence_mapLoc (MapLoc*)>
+
+<!--defines the docsum structure for refSNP clusters, where a refSNP cluster (rs) is a grouping of individual dbSNP submissions that all refer to the same variation. The refsnp provides a single unified record for annotation of NCBI resources such as reference genome sequence. -->
+<!ELEMENT Rs (
+        Rs_attlist, 
+        Rs_het?, 
+        Rs_validation, 
+        Rs_create, 
+        Rs_update?, 
+        Rs_sequence, 
+        Rs_ss, 
+        Rs_assembly?, 
+        Rs_primarySequence?, 
+        Rs_rsStruct?, 
+        Rs_rsLinkout?, 
+        Rs_mergeHistory?, 
+        Rs_hgvs?)>
+
+<!ELEMENT Rs_attlist (
+        Rs_attlist_rsId, 
+        Rs_attlist_snpClass, 
+        Rs_attlist_snpType, 
+        Rs_attlist_molType, 
+        Rs_attlist_validProbMin?, 
+        Rs_attlist_validProbMax?, 
+        Rs_attlist_genotype?, 
+        Rs_attlist_bitField?)>
+
+<!--refSNP (rs) number -->
+<!ELEMENT Rs_attlist_rsId (%INTEGER;)>
+
+<!ELEMENT Rs_attlist_snpClass %ENUM;>
+<!ATTLIST Rs_attlist_snpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_snpType %ENUM;>
+<!ATTLIST Rs_attlist_snpType value (
+        notwithdrawn |
+        artifact |
+        gene-duplication |
+        duplicate-submission |
+        notspecified |
+        ambiguous-location |
+        low-map-quality
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_molType %ENUM;>
+<!ATTLIST Rs_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--minimum reported success rate of all submissions in cluster -->
+<!ELEMENT Rs_attlist_validProbMin (%INTEGER;)>
+
+<!--maximum reported success rate of all submissions in cluster -->
+<!ELEMENT Rs_attlist_validProbMax (%INTEGER;)>
+
+<!--at least one genotype reported for this refSNP -->
+<!ELEMENT Rs_attlist_genotype EMPTY>
+<!ATTLIST Rs_attlist_genotype value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_bitField (#PCDATA)>
+
+<!ELEMENT Rs_het (
+        Rs_het_attlist, 
+        Rs_het_het)>
+
+<!ELEMENT Rs_het_attlist (
+        Rs_het_attlist_type, 
+        Rs_het_attlist_value, 
+        Rs_het_attlist_stdError?)>
+
+<!--Est=Estimated average het from allele frequencies, Obs=Observed from genotype data -->
+<!ELEMENT Rs_het_attlist_type %ENUM;>
+<!ATTLIST Rs_het_attlist_type value (
+        est |
+        obs
+        ) #REQUIRED >
+
+
+<!--Heterozygosity -->
+<!ELEMENT Rs_het_attlist_value (%REAL;)>
+
+<!--Standard error of Het estimate -->
+<!ELEMENT Rs_het_attlist_stdError (%REAL;)>
+
+<!ELEMENT Rs_het_het EMPTY>
+
+<!ELEMENT Rs_validation (
+        Rs_validation_attlist, 
+        Rs_validation_otherPopBatchId?, 
+        Rs_validation_twoHit2AlleleBatchId?)>
+
+<!ELEMENT Rs_validation_attlist (
+        Rs_validation_attlist_byCluster?, 
+        Rs_validation_attlist_byFrequency?, 
+        Rs_validation_attlist_byOtherPop?, 
+        Rs_validation_attlist_by2Hit2Allele?, 
+        Rs_validation_attlist_byHapMap?)>
+
+<!--at least one subsnp in cluster has frequency data submitted -->
+<!ELEMENT Rs_validation_attlist_byCluster EMPTY>
+<!ATTLIST Rs_validation_attlist_byCluster value ( true | false ) #REQUIRED >
+
+
+<!--cluster has 2+ submissions, with 1+ submissions assayed with a non-computational method -->
+<!ELEMENT Rs_validation_attlist_byFrequency EMPTY>
+<!ATTLIST Rs_validation_attlist_byFrequency value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_validation_attlist_byOtherPop EMPTY>
+<!ATTLIST Rs_validation_attlist_byOtherPop value ( true | false ) #REQUIRED >
+
+
+<!--cluster has 2+ submissions, with 1+ submissions assayed with a non-computational method -->
+<!ELEMENT Rs_validation_attlist_by2Hit2Allele EMPTY>
+<!ATTLIST Rs_validation_attlist_by2Hit2Allele value ( true | false ) #REQUIRED >
+
+
+<!--TBD -->
+<!ELEMENT Rs_validation_attlist_byHapMap EMPTY>
+<!ATTLIST Rs_validation_attlist_byHapMap value ( true | false ) #REQUIRED >
+
+
+<!--dbSNP batch-id's for other pop snp validation data. -->
+<!ELEMENT Rs_validation_otherPopBatchId (Rs_validation_otherPopBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_otherPopBatchId_E (%INTEGER;)>
+
+<!--dbSNP batch-id's for double-hit snp validation data. Use batch-id to get methods, etc. -->
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId (Rs_validation_twoHit2AlleleBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId_E (%INTEGER;)>
+<!--date the refsnp cluster was instantiated -->
+<!--date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create (
+        Rs_create_attlist, 
+        Rs_create_create)>
+<!--date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create_attlist (
+        Rs_create_attlist_build?, 
+        Rs_create_attlist_date?)>
+
+<!--build number when the cluster was created -->
+<!ELEMENT Rs_create_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_create_attlist_date (#PCDATA)>
+
+<!--date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create_create EMPTY>
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update (
+        Rs_update_attlist, 
+        Rs_update_update)>
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update_attlist (
+        Rs_update_attlist_build?, 
+        Rs_update_attlist_date?)>
+
+<!--build number when the cluster was updated -->
+<!ELEMENT Rs_update_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_update_attlist_date (#PCDATA)>
+
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update_update EMPTY>
+
+<!ELEMENT Rs_sequence (
+        Rs_sequence_attlist, 
+        Rs_sequence_seq5?, 
+        Rs_sequence_observed, 
+        Rs_sequence_seq3?)>
+
+<!ELEMENT Rs_sequence_attlist (
+        Rs_sequence_attlist_exemplarSs)>
+
+<!--dbSNP ss# selected as source of refSNP flanking sequence, ss# part of ss-list below  -->
+<!ELEMENT Rs_sequence_attlist_exemplarSs (%INTEGER;)>
+
+<!--
+5' sequence that flanks the variation
+5' sequence that flanks the variation
+-->
+<!ELEMENT Rs_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+-->
+<!ELEMENT Rs_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the variation
+3' sequence that flanks the variation
+-->
+<!ELEMENT Rs_sequence_seq3 (#PCDATA)>
+
+<!ELEMENT Rs_ss (Ss*)>
+
+<!ELEMENT Rs_assembly (Assembly*)>
+
+<!ELEMENT Rs_primarySequence (PrimarySequence*)>
+
+<!ELEMENT Rs_rsStruct (RsStruct*)>
+
+<!ELEMENT Rs_rsLinkout (RsLinkout*)>
+
+<!ELEMENT Rs_mergeHistory (Rs_mergeHistory_E*)>
+
+
+<!ELEMENT Rs_mergeHistory_E (
+        Rs_mergeHistory_E_attlist, 
+        Rs_mergeHistory_E_mergeHistory)>
+
+<!ELEMENT Rs_mergeHistory_E_attlist (
+        Rs_mergeHistory_E_attlist_rsId, 
+        Rs_mergeHistory_E_attlist_buildId?, 
+        Rs_mergeHistory_E_attlist_orientFlip?)>
+
+<!--previously issued rs id whose member assays have now been merged -->
+<!ELEMENT Rs_mergeHistory_E_attlist_rsId (%INTEGER;)>
+
+<!--build id when rs id was merged into parent rs -->
+<!ELEMENT Rs_mergeHistory_E_attlist_buildId (%INTEGER;)>
+
+<!--TRUE if strand of rs id is reverse to parent object's current strand -->
+<!ELEMENT Rs_mergeHistory_E_attlist_orientFlip EMPTY>
+<!ATTLIST Rs_mergeHistory_E_attlist_orientFlip value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_mergeHistory_E_mergeHistory EMPTY>
+
+<!--							HGVS name list -->
+<!ELEMENT Rs_hgvs (Rs_hgvs_E*)>
+
+
+<!ELEMENT Rs_hgvs_E (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout (
+        RsLinkout_attlist, 
+        RsLinkout_rsLinkout)>
+
+<!ELEMENT RsLinkout_attlist (
+        RsLinkout_attlist_resourceId, 
+        RsLinkout_attlist_linkValue)>
+
+<!--BaseURLList.url_id -->
+<!ELEMENT RsLinkout_attlist_resourceId (#PCDATA)>
+
+<!--value to append to ResourceURL.base-url for complete link -->
+<!ELEMENT RsLinkout_attlist_linkValue (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout_rsLinkout EMPTY>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct (
+        RsStruct_attlist, 
+        RsStruct_rsStruct)>
+
+<!ELEMENT RsStruct_attlist (
+        RsStruct_attlist_protAcc?, 
+        RsStruct_attlist_protGi?, 
+        RsStruct_attlist_protLoc?, 
+        RsStruct_attlist_protResidue?, 
+        RsStruct_attlist_rsResidue?, 
+        RsStruct_attlist_structGi?, 
+        RsStruct_attlist_structLoc?, 
+        RsStruct_attlist_structResidue?)>
+
+<!--accession of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protAcc (#PCDATA)>
+
+<!--GI of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protGi (%INTEGER;)>
+
+<!--position of the residue for the protein GI -->
+<!ELEMENT RsStruct_attlist_protLoc (%INTEGER;)>
+
+<!--residue specified for protein at prot-loc location -->
+<!ELEMENT RsStruct_attlist_protResidue (#PCDATA)>
+
+<!--alternative residue specified by variation sequence -->
+<!ELEMENT RsStruct_attlist_rsResidue (#PCDATA)>
+
+<!--GI of the structure neighbor -->
+<!ELEMENT RsStruct_attlist_structGi (%INTEGER;)>
+
+<!--position of the residue for the structure GI -->
+<!ELEMENT RsStruct_attlist_structLoc (%INTEGER;)>
+
+<!--residue specified for protein at struct-loc location -->
+<!ELEMENT RsStruct_attlist_structResidue (#PCDATA)>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct_rsStruct EMPTY>
+
+<!--data for an individual submission to dbSNP -->
+<!ELEMENT Ss (
+        Ss_attlist, 
+        Ss_sequence)>
+
+<!ELEMENT Ss_attlist (
+        Ss_attlist_ssId, 
+        Ss_attlist_handle, 
+        Ss_attlist_batchId, 
+        Ss_attlist_locSnpId?, 
+        Ss_attlist_subSnpClass?, 
+        Ss_attlist_orient?, 
+        Ss_attlist_strand?, 
+        Ss_attlist_molType?, 
+        Ss_attlist_buildId?, 
+        Ss_attlist_methodClass?, 
+        Ss_attlist_validated?, 
+        Ss_attlist_linkoutUrl?)>
+
+<!--dbSNP accession number for submission -->
+<!ELEMENT Ss_attlist_ssId (%INTEGER;)>
+
+<!--Tag for the submitting laboratory -->
+<!ELEMENT Ss_attlist_handle (#PCDATA)>
+
+<!--dbSNP number for batch submission -->
+<!ELEMENT Ss_attlist_batchId (%INTEGER;)>
+
+<!--
+submission (ss#)
+submitter ID
+-->
+<!ELEMENT Ss_attlist_locSnpId (#PCDATA)>
+
+<!--SubSNP classification by type of variation -->
+<!ELEMENT Ss_attlist_subSnpClass %ENUM;>
+<!ATTLIST Ss_attlist_subSnpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+<!--
+orientation of refsnp cluster members to refsnp cluster sequence
+ss flanking sequence is in same orientation as seq-ss-exemplar
+lanking sequence and alleles are reverse complement of refSNP as defined by ss exemplar
+-->
+<!ELEMENT Ss_attlist_orient %ENUM;>
+<!ATTLIST Ss_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--strand is defined as TOP/BOTTOM by nature of flanking nucleotide sequence -->
+<!ELEMENT Ss_attlist_strand %ENUM;>
+<!ATTLIST Ss_attlist_strand value (
+        top |
+        bottom
+        ) #REQUIRED >
+
+
+<!--moltype from Batch table -->
+<!ELEMENT Ss_attlist_molType %ENUM;>
+<!ATTLIST Ss_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--dbSNP build number when ss# was added to a refSNP (rs#) cluster -->
+<!ELEMENT Ss_attlist_buildId (%INTEGER;)>
+<!--
+class of method used to assay for the variation
+Denaturing High Pressure Liquid Chromatography used to detect SNP
+a hybridization method (e.g. chip) was used to assay for variation
+variation was mined from sequence alignment with software
+samples were sequenced and resulting alignment used to define variation
+-->
+<!ELEMENT Ss_attlist_methodClass %ENUM;>
+<!ATTLIST Ss_attlist_methodClass value (
+        dHPLC |
+        hybridize |
+        computed |
+        sSCP |
+        other |
+        unknown |
+        rFLP |
+        sequence
+        ) #REQUIRED >
+
+<!--
+subsnp has been experimentally validated by submitter
+subsnp has frequency data submitted
+has 2+ submissions, with 1+ submission assayed with a non-computational method
+-->
+<!ELEMENT Ss_attlist_validated %ENUM;>
+<!ATTLIST Ss_attlist_validated value (
+        by-submitter |
+        by-frequency |
+        by-cluster
+        ) #REQUIRED >
+
+
+<!--append loc-snp-id to this base URL to construct a pointer to submitter data. -->
+<!ELEMENT Ss_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Ss_sequence (
+        Ss_sequence_seq5?, 
+        Ss_sequence_observed, 
+        Ss_sequence_seq3?)>
+
+<!--
+5' sequence that flanks the variation
+5' sequence that flanks the variation
+-->
+<!ELEMENT Ss_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+-->
+<!ELEMENT Ss_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the variation
+3' sequence that flanks the variation
+-->
+<!ELEMENT Ss_sequence_seq3 (#PCDATA)>
+
diff --git a/dtd/Docsum_3_1.dtd b/dtd/Docsum_3_1.dtd
new file mode 100644
index 0000000..a82d6a8
--- /dev/null
+++ b/dtd/Docsum_3_1.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.2
+     ::DATATOOL:: on 05/06/2009 23:05:17
+     ============================================ -->
+
+<!-- Docsum_3_1.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % Docsum_3_1_module PUBLIC "-//NCBI//Docsum 3 1 Module//EN" "Docsum_3_1.mod.dtd">
+%Docsum_3_1_module;
diff --git a/dtd/Docsum_3_1.mod.dtd b/dtd/Docsum_3_1.mod.dtd
new file mode 100644
index 0000000..ce57767
--- /dev/null
+++ b/dtd/Docsum_3_1.mod.dtd
@@ -0,0 +1,1055 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.2
+     ::DATATOOL:: on 05/06/2009 23:05:17
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "Docsum-3-1"
+================================================= -->
+
+<!--
+ ============================================
+ ::DATATOOL:: Generated from "docsum_3.1.xsd"
+ ::DATATOOL:: by application DATATOOL version 1.8.6
+ ::DATATOOL:: on 05/05/2009 10:27:19
+ ============================================
+ edited with XMLSPY v5 rel. 4 U (http://www.xmlspy.com) by Michael Kholodov (National Library of Medicine) 
+ edited with XMLSpy v2005 rel. 3 U (http://www.altova.com) by Michael Feolo (NCBI/NLM/NIH) 
+-->
+
+
+<!ELEMENT Assay (
+        Assay_attlist, 
+        Assay_method, 
+        Assay_taxonomy, 
+        Assay_strains?, 
+        Assay_comment?, 
+        Assay_citation?)>
+
+<!ELEMENT Assay_attlist (
+        Assay_attlist_handle?, 
+        Assay_attlist_batch?, 
+        Assay_attlist_batchId?, 
+        Assay_attlist_batchType?, 
+        Assay_attlist_molType?, 
+        Assay_attlist_sampleSize?, 
+        Assay_attlist_population?, 
+        Assay_attlist_linkoutUrl?)>
+
+<!ELEMENT Assay_attlist_handle (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batch (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batchId (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_batchType %ENUM;>
+<!ATTLIST Assay_attlist_batchType value (
+        snpassay |
+        validation |
+        doublehit
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_molType %ENUM;>
+<!ATTLIST Assay_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_population (#PCDATA)>
+
+<!ELEMENT Assay_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Assay_method (
+        Assay_method_eMethod?)>
+
+<!ELEMENT Assay_method_eMethod (
+        Assay_method_eMethod_attlist, 
+        Assay_method_eMethod_exception)>
+
+<!ELEMENT Assay_method_eMethod_attlist (
+        Assay_method_eMethod_attlist_name?, 
+        Assay_method_eMethod_attlist_id?)>
+
+<!--Submitters method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_name (#PCDATA)>
+
+<!--dbSNP method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_id (#PCDATA)>
+
+<!--description of deviation from/addition to given method -->
+<!ELEMENT Assay_method_eMethod_exception (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy (
+        Assay_taxonomy_attlist, 
+        Assay_taxonomy_taxonomy)>
+
+<!ELEMENT Assay_taxonomy_attlist (
+        Assay_taxonomy_attlist_id, 
+        Assay_taxonomy_attlist_organism?)>
+
+<!--NCBI taxonomy ID for variation -->
+<!ELEMENT Assay_taxonomy_attlist_id (%INTEGER;)>
+
+<!ELEMENT Assay_taxonomy_attlist_organism (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy_taxonomy EMPTY>
+
+<!ELEMENT Assay_strains (Assay_strains_E*)>
+
+
+<!ELEMENT Assay_strains_E (#PCDATA)>
+
+<!ELEMENT Assay_comment (#PCDATA)>
+
+<!ELEMENT Assay_citation (Assay_citation_E*)>
+
+
+<!ELEMENT Assay_citation_E (#PCDATA)>
+
+<!--A collection of genome sequence records (curated gene regions (NG's), contigs (NWNT's)  and chromosomes (NC/AC's) produced by a genome sequence project. Structure is populated from ContigInfo tables. -->
+<!ELEMENT Assembly (
+        Assembly_attlist, 
+        Assembly_component?, 
+        Assembly_snpStat)>
+
+<!ELEMENT Assembly_attlist (
+        Assembly_attlist_dbSnpBuild, 
+        Assembly_attlist_genomeBuild, 
+        Assembly_attlist_groupLabel?, 
+        Assembly_attlist_assemblySource?, 
+        Assembly_attlist_current?, 
+        Assembly_attlist_reference?)>
+
+<!--dbSNP build number defining the rsid set aligned to this assembly -->
+<!ELEMENT Assembly_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--assembly build number with possible 'subbuild' version numbers to reflect updates in gene annotation (human e.g. 34_3, 35_1, 36_1) -->
+<!ELEMENT Assembly_attlist_genomeBuild (#PCDATA)>
+
+<!--High-level classification of the assembly to distinguish reference projects from alternate solutions. GroupLabel field from organism/build-specific ContigInfo tables. "reference" is occasionally used as the preferred assembly; standards will converge as additional organism genome projects are finished. Note that some organism assembly names include extended characters like '~' and '/' that may be incompatible with OS filename conventions. -->
+<!ELEMENT Assembly_attlist_groupLabel (#PCDATA)>
+
+<!--Name of the group(s) or organization(s) that generated the assembly -->
+<!ELEMENT Assembly_attlist_assemblySource (#PCDATA)>
+
+<!--Marks the current genomic assembly -->
+<!ELEMENT Assembly_attlist_current EMPTY>
+<!ATTLIST Assembly_attlist_current value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_attlist_reference EMPTY>
+<!ATTLIST Assembly_attlist_reference value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_component (Component*)>
+
+<!ELEMENT Assembly_snpStat (
+        Assembly_snpStat_attlist, 
+        Assembly_snpStat_snpStat)>
+
+<!ELEMENT Assembly_snpStat_attlist (
+        Assembly_snpStat_attlist_mapWeight, 
+        Assembly_snpStat_attlist_chromCount?, 
+        Assembly_snpStat_attlist_placedContigCount?, 
+        Assembly_snpStat_attlist_unplacedContigCount?, 
+        Assembly_snpStat_attlist_seqlocCount?, 
+        Assembly_snpStat_attlist_hapCount?)>
+
+<!--summary measure of placement precision in the assembly -->
+<!ELEMENT Assembly_snpStat_attlist_mapWeight %ENUM;>
+<!ATTLIST Assembly_snpStat_attlist_mapWeight value (
+        unmapped |
+        unique-in-contig |
+        two-hits-in-contig |
+        less-10-hits |
+        multiple-hits
+        ) #REQUIRED >
+
+
+<!--number of distinct chromosomes in the mapset -->
+<!ELEMENT Assembly_snpStat_attlist_chromCount (%INTEGER;)>
+
+<!--number of distinct contigs [ gi | accession[.version] ] in the mapset -->
+<!ELEMENT Assembly_snpStat_attlist_placedContigCount (%INTEGER;)>
+
+<!--number of sequence postions to a contig with unknown chromosomal assignment -->
+<!ELEMENT Assembly_snpStat_attlist_unplacedContigCount (%INTEGER;)>
+
+<!--total number of sequence positions in the mapset -->
+<!ELEMENT Assembly_snpStat_attlist_seqlocCount (%INTEGER;)>
+
+<!--Number of hits to alternative genomic haplotypes (e.g. HLA DR region, KIR, or pseudo-autosomal regions like PAR) within the assembly mapset. Note that positions on haplotypes defined in other assemblies (a different assembly_group_label value) will not be counted in this value. -->
+<!ELEMENT Assembly_snpStat_attlist_hapCount (%INTEGER;)>
+
+<!ELEMENT Assembly_snpStat_snpStat EMPTY>
+
+<!--URL value from dbSNP_main.BaseURL links table. attributes provide context information and URL id that is referenced within individual refSNP objects. -->
+<!ELEMENT BaseURL (
+        BaseURL_attlist, 
+        BaseURL_baseURL)>
+
+<!ELEMENT BaseURL_attlist (
+        BaseURL_attlist_urlId?, 
+        BaseURL_attlist_resourceName?, 
+        BaseURL_attlist_resourceId?)>
+
+<!--Resource identifier from dbSNP_main.baseURL. -->
+<!ELEMENT BaseURL_attlist_urlId (%INTEGER;)>
+
+<!--Name of linked resource -->
+<!ELEMENT BaseURL_attlist_resourceName (#PCDATA)>
+
+<!--identifier expected by resource for URL -->
+<!ELEMENT BaseURL_attlist_resourceId (#PCDATA)>
+
+<!--URL value from dbSNP_main.BaseURL links table. attributes provide context information and URL id that is referenced within individual refSNP objects. -->
+<!ELEMENT BaseURL_baseURL (#PCDATA)>
+
+
+<!ELEMENT Component (
+        Component_attlist, 
+        Component_mapLoc)>
+
+<!ELEMENT Component_attlist (
+        Component_attlist_componentType?, 
+        Component_attlist_ctgId?, 
+        Component_attlist_accession?, 
+        Component_attlist_name?, 
+        Component_attlist_chromosome?, 
+        Component_attlist_start?, 
+        Component_attlist_end?, 
+        Component_attlist_orientation?, 
+        Component_attlist_gi?, 
+        Component_attlist_groupTerm?, 
+        Component_attlist_contigLabel?)>
+
+<!--type of component: chromosome, contig, gene_region, etc. -->
+<!ELEMENT Component_attlist_componentType %ENUM;>
+<!ATTLIST Component_attlist_componentType value (
+        contig |
+        mrna
+        ) #REQUIRED >
+
+
+<!--dbSNP contig_id used to join on contig hit / mapset data to these assembly properties -->
+<!ELEMENT Component_attlist_ctgId (%INTEGER;)>
+
+<!--Accession[.version] for the sequence component -->
+<!ELEMENT Component_attlist_accession (#PCDATA)>
+
+<!--contig name defined as either a submitter local id, element of a whole genome assembly set, or internal NCBI local id -->
+<!ELEMENT Component_attlist_name (#PCDATA)>
+
+<!--Organism appropriate chromosome tag, 'Un' reserved for default case of unplaced components -->
+<!ELEMENT Component_attlist_chromosome (#PCDATA)>
+
+<!--component starting position on the chromosome (base 0 inclusive) -->
+<!ELEMENT Component_attlist_start (%INTEGER;)>
+
+<!--component ending position on the chromosome (base 0 inclusive) -->
+<!ELEMENT Component_attlist_end (%INTEGER;)>
+
+<!--orientation of this component to chromosome, forward (fwd) = 0, reverse (rev) = 1, unknown = NULL in ContigInfo.orient. -->
+<!ELEMENT Component_attlist_orientation %ENUM;>
+<!ATTLIST Component_attlist_orientation value (
+        fwd |
+        rev |
+        unknown
+        ) #REQUIRED >
+
+
+<!--NCBI gi for component sequence (equivalent to accession.version) for nucleotide sequence. -->
+<!ELEMENT Component_attlist_gi (#PCDATA)>
+
+<!--Identifier label for the genome assembly that defines the contigs in this mapset and their placement within the organism genome.  -->
+<!ELEMENT Component_attlist_groupTerm (#PCDATA)>
+
+<!--Display label for component -->
+<!ELEMENT Component_attlist_contigLabel (#PCDATA)>
+
+<!ELEMENT Component_mapLoc (MapLoc*)>
+
+<!--Set of dbSNP refSNP docsums -->
+<!ELEMENT ExchangeSet (
+        ExchangeSet_attlist, 
+        ExchangeSet_sourceDatabase, 
+        ExchangeSet_rs?, 
+        ExchangeSet_assay?, 
+        ExchangeSet_query?, 
+        ExchangeSet_summary, 
+        ExchangeSet_baseURL)>
+
+<!ELEMENT ExchangeSet_attlist (
+        ExchangeSet_attlist_setType?, 
+        ExchangeSet_attlist_setDepth?, 
+        ExchangeSet_attlist_specVersion?, 
+        ExchangeSet_attlist_dbSnpBuild?, 
+        ExchangeSet_attlist_generated?)>
+
+<!--set-type: full dump; from query; single refSNP -->
+<!ELEMENT ExchangeSet_attlist_setType (#PCDATA)>
+
+<!--content depth: brief XML (only refSNP properties and summary subSNP element content); full XML (full refSNP, full subSNP content; all flanking sequences) -->
+<!ELEMENT ExchangeSet_attlist_setDepth (#PCDATA)>
+
+<!--version number of docsum.asn/docsum.dtd specification -->
+<!ELEMENT ExchangeSet_attlist_specVersion (#PCDATA)>
+
+<!--build number of database for this export -->
+<!ELEMENT ExchangeSet_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--Generated date -->
+<!ELEMENT ExchangeSet_attlist_generated (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase (
+        ExchangeSet_sourceDatabase_attlist, 
+        ExchangeSet_sourceDatabase_sourceDatabase)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_attlist (
+        ExchangeSet_sourceDatabase_attlist_taxId, 
+        ExchangeSet_sourceDatabase_attlist_organism, 
+        ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr?, 
+        ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr?)>
+
+<!--NCBI taxonomy ID for variation -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_taxId (%INTEGER;)>
+
+<!--common name for species used as part of database name. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_organism (#PCDATA)>
+
+<!--organism abbreviation used in dbSNP.  -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr (#PCDATA)>
+
+<!--organism abbreviation used within NCBI genome pipeline data dumps. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_sourceDatabase EMPTY>
+
+<!ELEMENT ExchangeSet_rs (Rs*)>
+
+<!ELEMENT ExchangeSet_assay (Assay)>
+
+<!ELEMENT ExchangeSet_query (
+        ExchangeSet_query_attlist, 
+        ExchangeSet_query_query)>
+
+<!ELEMENT ExchangeSet_query_attlist (
+        ExchangeSet_query_attlist_date?, 
+        ExchangeSet_query_attlist_string?)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT ExchangeSet_query_attlist_date (#PCDATA)>
+
+<!--Query terms or search constraints -->
+<!ELEMENT ExchangeSet_query_attlist_string (#PCDATA)>
+
+<!ELEMENT ExchangeSet_query_query EMPTY>
+
+<!ELEMENT ExchangeSet_summary (
+        ExchangeSet_summary_attlist, 
+        ExchangeSet_summary_summary)>
+
+<!ELEMENT ExchangeSet_summary_attlist (
+        ExchangeSet_summary_attlist_numRsIds?, 
+        ExchangeSet_summary_attlist_totalSeqLength?, 
+        ExchangeSet_summary_attlist_numContigHits?, 
+        ExchangeSet_summary_attlist_numGeneHits?, 
+        ExchangeSet_summary_attlist_numGiHits?, 
+        ExchangeSet_summary_attlist_num3dStructs?, 
+        ExchangeSet_summary_attlist_numAlleleFreqs?, 
+        ExchangeSet_summary_attlist_numStsHits?, 
+        ExchangeSet_summary_attlist_numUnigeneCids?)>
+
+<!--Total number of refsnp-ids in this exchange set -->
+<!ELEMENT ExchangeSet_summary_attlist_numRsIds (%INTEGER;)>
+
+<!--Total length of exemplar flanking sequences -->
+<!ELEMENT ExchangeSet_summary_attlist_totalSeqLength (%INTEGER;)>
+
+<!--Total number of contig locations from SNPContigLoc -->
+<!ELEMENT ExchangeSet_summary_attlist_numContigHits (%INTEGER;)>
+
+<!--Total number of locus ids from SNPContigLocusId -->
+<!ELEMENT ExchangeSet_summary_attlist_numGeneHits (%INTEGER;)>
+
+<!--Total number of gi hits from MapLink -->
+<!ELEMENT ExchangeSet_summary_attlist_numGiHits (%INTEGER;)>
+
+<!--Total number of 3D structures from SNP3D -->
+<!ELEMENT ExchangeSet_summary_attlist_num3dStructs (%INTEGER;)>
+
+<!--Total number of allele frequences from SubPopAllele -->
+<!ELEMENT ExchangeSet_summary_attlist_numAlleleFreqs (%INTEGER;)>
+
+<!--Total number of STS hits from SnpInSts -->
+<!ELEMENT ExchangeSet_summary_attlist_numStsHits (%INTEGER;)>
+
+<!--Total number of unigene cluster ids from UnigeneSnp -->
+<!ELEMENT ExchangeSet_summary_attlist_numUnigeneCids (%INTEGER;)>
+
+<!ELEMENT ExchangeSet_summary_summary EMPTY>
+
+<!ELEMENT ExchangeSet_baseURL (BaseURL*)>
+
+<!--functional relationship of SNP (and possibly alleles) to genes at contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx tables. -->
+<!ELEMENT FxnSet (
+        FxnSet_attlist, 
+        FxnSet_fxnSet)>
+
+<!ELEMENT FxnSet_attlist (
+        FxnSet_attlist_geneId?, 
+        FxnSet_attlist_symbol?, 
+        FxnSet_attlist_mrnaAcc?, 
+        FxnSet_attlist_mrnaVer?, 
+        FxnSet_attlist_protAcc?, 
+        FxnSet_attlist_protVer?, 
+        FxnSet_attlist_fxnClass?, 
+        FxnSet_attlist_readingFrame?, 
+        FxnSet_attlist_allele?, 
+        FxnSet_attlist_residue?, 
+        FxnSet_attlist_aaPosition?)>
+
+<!--gene-id of gene as aligned to contig -->
+<!ELEMENT FxnSet_attlist_geneId (%INTEGER;)>
+
+<!--symbol (official if present in Entrez Gene) of gene -->
+<!ELEMENT FxnSet_attlist_symbol (#PCDATA)>
+
+<!--mRNA accession if variation in transcript -->
+<!ELEMENT FxnSet_attlist_mrnaAcc (#PCDATA)>
+
+<!--mRNA sequence version if variation is in transcripot -->
+<!ELEMENT FxnSet_attlist_mrnaVer (%INTEGER;)>
+
+<!--protein accession if variation in protein -->
+<!ELEMENT FxnSet_attlist_protAcc (#PCDATA)>
+
+<!--protein version if variation is in protein -->
+<!ELEMENT FxnSet_attlist_protVer (%INTEGER;)>
+<!--
+variation in region of gene, but not in transcript - deprecated
+								synonymous change	
+								nonsynonymous change - deprecated
+								untranslated region - deprecated
+								splice-site - deprecated
+								contig reference
+								deprecated
+									coding: synonymy unknown
+									In gene segment with null mrna and protein. ex. IGLV4-69. geneId=28784
+									within 3' 0.5kb to a gene.
+									changes to STOP codon.
+									alters codon to make an altered amino acid in protein product.
+									indel snp causing frameshift.
+									3 prime untranslated region
+									5 prime untranslated region
+									3 prime acceptor dinucleotide
+									5 prime donor dinucleotide
+-->
+<!ELEMENT FxnSet_attlist_fxnClass %ENUM;>
+<!ATTLIST FxnSet_attlist_fxnClass value (
+        locus-region |
+        coding-unknown |
+        coding-synonymous |
+        coding-nonsynonymous |
+        mrna-utr |
+        intron |
+        splice-site |
+        reference |
+        coding-exception |
+        synonymy-unknown |
+        gene-segment |
+        near-gene-3 |
+        near-gene-5 |
+        nonsense |
+        missense |
+        frameshift |
+        utr-3 |
+        utr-5 |
+        splice-3 |
+        splice-5
+        ) #REQUIRED >
+
+
+<!ELEMENT FxnSet_attlist_readingFrame (%INTEGER;)>
+
+<!--variation allele: * suffix indicates allele of contig at this location -->
+<!ELEMENT FxnSet_attlist_allele (#PCDATA)>
+
+<!--translated amino acid residue for allele -->
+<!ELEMENT FxnSet_attlist_residue (#PCDATA)>
+
+<!--position of the variant residue in peptide sequence -->
+<!ELEMENT FxnSet_attlist_aaPosition (%INTEGER;)>
+
+<!--functional relationship of SNP (and possibly alleles) to genes at contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx tables. -->
+<!ELEMENT FxnSet_fxnSet EMPTY>
+
+<!--Position of a single hit of a variation on a contig -->
+<!ELEMENT MapLoc (
+        MapLoc_attlist, 
+        MapLoc_fxnSet?)>
+
+<!ELEMENT MapLoc_attlist (
+        MapLoc_attlist_asnFrom, 
+        MapLoc_attlist_asnTo, 
+        MapLoc_attlist_locType, 
+        MapLoc_attlist_alnQuality?, 
+        MapLoc_attlist_orient?, 
+        MapLoc_attlist_physMapInt?, 
+        MapLoc_attlist_leftFlankNeighborPos?, 
+        MapLoc_attlist_rightFlankNeighborPos?, 
+        MapLoc_attlist_leftContigNeighborPos?, 
+        MapLoc_attlist_rightContigNeighborPos?, 
+        MapLoc_attlist_numberOfMismatches?, 
+        MapLoc_attlist_numberOfDeletions?, 
+        MapLoc_attlist_numberOfInsertions?)>
+
+<!--beginning of variation as feature on contig -->
+<!ELEMENT MapLoc_attlist_asnFrom (%INTEGER;)>
+
+<!--end position of variation as feature on contig -->
+<!ELEMENT MapLoc_attlist_asnTo (%INTEGER;)>
+<!--
+defines the seq-loc symbol if asn_from != asn_to
+insertion on contig
+asn-from = asn-to write as 'asn-from'
+deletion on contig
+-->
+<!ELEMENT MapLoc_attlist_locType %ENUM;>
+<!ATTLIST MapLoc_attlist_locType value (
+        insertion |
+        exact |
+        deletion |
+        range-ins |
+        range-exact |
+        range-del
+        ) #REQUIRED >
+
+
+<!--alignment qualiity -->
+<!ELEMENT MapLoc_attlist_alnQuality (%REAL;)>
+
+<!--orientation of refSNP sequence to contig sequence -->
+<!ELEMENT MapLoc_attlist_orient %ENUM;>
+<!ATTLIST MapLoc_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--chromosome position as integer for sorting -->
+<!ELEMENT MapLoc_attlist_physMapInt (%INTEGER;)>
+
+<!--nearest aligned position in 5' flanking sequence of snp -->
+<!ELEMENT MapLoc_attlist_leftFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' flanking sequence of snp  -->
+<!ELEMENT MapLoc_attlist_rightFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 5' contig alignment of snp -->
+<!ELEMENT MapLoc_attlist_leftContigNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' contig alignment of snp -->
+<!ELEMENT MapLoc_attlist_rightContigNeighborPos (%INTEGER;)>
+
+<!--number of Mismatched positions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfMismatches (%INTEGER;)>
+
+<!--number of deletions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfDeletions (%INTEGER;)>
+
+<!--number of insetions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfInsertions (%INTEGER;)>
+
+<!ELEMENT MapLoc_fxnSet (FxnSet*)>
+
+
+<!ELEMENT PrimarySequence (
+        PrimarySequence_attlist, 
+        PrimarySequence_mapLoc)>
+
+<!ELEMENT PrimarySequence_attlist (
+        PrimarySequence_attlist_dbSnpBuild, 
+        PrimarySequence_attlist_gi, 
+        PrimarySequence_attlist_source?, 
+        PrimarySequence_attlist_accession?)>
+
+<!ELEMENT PrimarySequence_attlist_dbSnpBuild (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_gi (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_source %ENUM;>
+<!ATTLIST PrimarySequence_attlist_source value (
+        submitter |
+        blastmb |
+        xm |
+        remap
+        ) #REQUIRED >
+
+
+<!ELEMENT PrimarySequence_attlist_accession (#PCDATA)>
+
+<!ELEMENT PrimarySequence_mapLoc (MapLoc*)>
+
+<!--defines the docsum structure for refSNP clusters, where a refSNP cluster (rs) is a grouping of individual dbSNP submissions that all refer to the same variation. The refsnp provides a single unified record for annotation of NCBI resources such as reference genome sequence. -->
+<!ELEMENT Rs (
+        Rs_attlist, 
+        Rs_het?, 
+        Rs_validation, 
+        Rs_create, 
+        Rs_update?, 
+        Rs_sequence, 
+        Rs_ss, 
+        Rs_assembly?, 
+        Rs_primarySequence?, 
+        Rs_rsStruct?, 
+        Rs_rsLinkout?, 
+        Rs_mergeHistory?, 
+        Rs_hgvs?)>
+
+<!ELEMENT Rs_attlist (
+        Rs_attlist_rsId, 
+        Rs_attlist_snpClass, 
+        Rs_attlist_snpType, 
+        Rs_attlist_molType, 
+        Rs_attlist_validProbMin?, 
+        Rs_attlist_validProbMax?, 
+        Rs_attlist_genotype?, 
+        Rs_attlist_bitField?)>
+
+<!--refSNP (rs) number -->
+<!ELEMENT Rs_attlist_rsId (%INTEGER;)>
+
+<!ELEMENT Rs_attlist_snpClass %ENUM;>
+<!ATTLIST Rs_attlist_snpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_snpType %ENUM;>
+<!ATTLIST Rs_attlist_snpType value (
+        notwithdrawn |
+        artifact |
+        gene-duplication |
+        duplicate-submission |
+        notspecified |
+        ambiguous-location |
+        low-map-quality
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_molType %ENUM;>
+<!ATTLIST Rs_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--minimum reported success rate of all submissions in cluster -->
+<!ELEMENT Rs_attlist_validProbMin (%INTEGER;)>
+
+<!--maximum reported success rate of all submissions in cluster -->
+<!ELEMENT Rs_attlist_validProbMax (%INTEGER;)>
+
+<!--at least one genotype reported for this refSNP -->
+<!ELEMENT Rs_attlist_genotype EMPTY>
+<!ATTLIST Rs_attlist_genotype value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_bitField (#PCDATA)>
+
+<!ELEMENT Rs_het (
+        Rs_het_attlist, 
+        Rs_het_het)>
+
+<!ELEMENT Rs_het_attlist (
+        Rs_het_attlist_type, 
+        Rs_het_attlist_value, 
+        Rs_het_attlist_stdError?)>
+
+<!--Est=Estimated average het from allele frequencies, Obs=Observed from genotype data -->
+<!ELEMENT Rs_het_attlist_type %ENUM;>
+<!ATTLIST Rs_het_attlist_type value (
+        est |
+        obs
+        ) #REQUIRED >
+
+
+<!--Heterozygosity -->
+<!ELEMENT Rs_het_attlist_value (%REAL;)>
+
+<!--Standard error of Het estimate -->
+<!ELEMENT Rs_het_attlist_stdError (%REAL;)>
+
+<!ELEMENT Rs_het_het EMPTY>
+
+<!ELEMENT Rs_validation (
+        Rs_validation_attlist, 
+        Rs_validation_otherPopBatchId?, 
+        Rs_validation_twoHit2AlleleBatchId?)>
+
+<!ELEMENT Rs_validation_attlist (
+        Rs_validation_attlist_byCluster?, 
+        Rs_validation_attlist_byFrequency?, 
+        Rs_validation_attlist_byOtherPop?, 
+        Rs_validation_attlist_by2Hit2Allele?, 
+        Rs_validation_attlist_byHapMap?)>
+
+<!--at least one subsnp in cluster has frequency data submitted -->
+<!ELEMENT Rs_validation_attlist_byCluster EMPTY>
+<!ATTLIST Rs_validation_attlist_byCluster value ( true | false ) #REQUIRED >
+
+
+<!--cluster has 2+ submissions, with 1+ submissions assayed with a non-computational method -->
+<!ELEMENT Rs_validation_attlist_byFrequency EMPTY>
+<!ATTLIST Rs_validation_attlist_byFrequency value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_validation_attlist_byOtherPop EMPTY>
+<!ATTLIST Rs_validation_attlist_byOtherPop value ( true | false ) #REQUIRED >
+
+
+<!--cluster has 2+ submissions, with 1+ submissions assayed with a non-computational method -->
+<!ELEMENT Rs_validation_attlist_by2Hit2Allele EMPTY>
+<!ATTLIST Rs_validation_attlist_by2Hit2Allele value ( true | false ) #REQUIRED >
+
+
+<!--TBD -->
+<!ELEMENT Rs_validation_attlist_byHapMap EMPTY>
+<!ATTLIST Rs_validation_attlist_byHapMap value ( true | false ) #REQUIRED >
+
+
+<!--dbSNP batch-id's for other pop snp validation data. -->
+<!ELEMENT Rs_validation_otherPopBatchId (Rs_validation_otherPopBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_otherPopBatchId_E (%INTEGER;)>
+
+<!--dbSNP batch-id's for double-hit snp validation data. Use batch-id to get methods, etc. -->
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId (Rs_validation_twoHit2AlleleBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId_E (%INTEGER;)>
+<!--date the refsnp cluster was instantiated -->
+<!--date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create (
+        Rs_create_attlist, 
+        Rs_create_create)>
+<!--date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create_attlist (
+        Rs_create_attlist_build?, 
+        Rs_create_attlist_date?)>
+
+<!--build number when the cluster was created -->
+<!ELEMENT Rs_create_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_create_attlist_date (#PCDATA)>
+
+<!--date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create_create EMPTY>
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update (
+        Rs_update_attlist, 
+        Rs_update_update)>
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update_attlist (
+        Rs_update_attlist_build?, 
+        Rs_update_attlist_date?)>
+
+<!--build number when the cluster was updated -->
+<!ELEMENT Rs_update_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_update_attlist_date (#PCDATA)>
+
+<!--most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update_update EMPTY>
+
+<!ELEMENT Rs_sequence (
+        Rs_sequence_attlist, 
+        Rs_sequence_seq5?, 
+        Rs_sequence_observed, 
+        Rs_sequence_seq3?)>
+
+<!ELEMENT Rs_sequence_attlist (
+        Rs_sequence_attlist_exemplarSs)>
+
+<!--dbSNP ss# selected as source of refSNP flanking sequence, ss# part of ss-list below  -->
+<!ELEMENT Rs_sequence_attlist_exemplarSs (%INTEGER;)>
+
+<!--
+5' sequence that flanks the variation
+5' sequence that flanks the variation
+-->
+<!ELEMENT Rs_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+-->
+<!ELEMENT Rs_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the variation
+3' sequence that flanks the variation
+-->
+<!ELEMENT Rs_sequence_seq3 (#PCDATA)>
+
+<!ELEMENT Rs_ss (Ss*)>
+
+<!ELEMENT Rs_assembly (Assembly*)>
+
+<!ELEMENT Rs_primarySequence (PrimarySequence*)>
+
+<!ELEMENT Rs_rsStruct (RsStruct*)>
+
+<!ELEMENT Rs_rsLinkout (RsLinkout*)>
+
+<!ELEMENT Rs_mergeHistory (Rs_mergeHistory_E*)>
+
+
+<!ELEMENT Rs_mergeHistory_E (
+        Rs_mergeHistory_E_attlist, 
+        Rs_mergeHistory_E_mergeHistory)>
+
+<!ELEMENT Rs_mergeHistory_E_attlist (
+        Rs_mergeHistory_E_attlist_rsId, 
+        Rs_mergeHistory_E_attlist_buildId?, 
+        Rs_mergeHistory_E_attlist_orientFlip?)>
+
+<!--previously issued rs id whose member assays have now been merged -->
+<!ELEMENT Rs_mergeHistory_E_attlist_rsId (%INTEGER;)>
+
+<!--build id when rs id was merged into parent rs -->
+<!ELEMENT Rs_mergeHistory_E_attlist_buildId (%INTEGER;)>
+
+<!--TRUE if strand of rs id is reverse to parent object's current strand -->
+<!ELEMENT Rs_mergeHistory_E_attlist_orientFlip EMPTY>
+<!ATTLIST Rs_mergeHistory_E_attlist_orientFlip value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_mergeHistory_E_mergeHistory EMPTY>
+
+<!--							HGVS name list -->
+<!ELEMENT Rs_hgvs (Rs_hgvs_E*)>
+
+
+<!ELEMENT Rs_hgvs_E (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout (
+        RsLinkout_attlist, 
+        RsLinkout_rsLinkout)>
+
+<!ELEMENT RsLinkout_attlist (
+        RsLinkout_attlist_resourceId, 
+        RsLinkout_attlist_linkValue)>
+
+<!--BaseURLList.url_id -->
+<!ELEMENT RsLinkout_attlist_resourceId (#PCDATA)>
+
+<!--value to append to ResourceURL.base-url for complete link -->
+<!ELEMENT RsLinkout_attlist_linkValue (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout_rsLinkout EMPTY>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct (
+        RsStruct_attlist, 
+        RsStruct_rsStruct)>
+
+<!ELEMENT RsStruct_attlist (
+        RsStruct_attlist_protAcc?, 
+        RsStruct_attlist_protGi?, 
+        RsStruct_attlist_protLoc?, 
+        RsStruct_attlist_protResidue?, 
+        RsStruct_attlist_rsResidue?, 
+        RsStruct_attlist_structGi?, 
+        RsStruct_attlist_structLoc?, 
+        RsStruct_attlist_structResidue?)>
+
+<!--accession of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protAcc (#PCDATA)>
+
+<!--GI of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protGi (%INTEGER;)>
+
+<!--position of the residue for the protein GI -->
+<!ELEMENT RsStruct_attlist_protLoc (%INTEGER;)>
+
+<!--residue specified for protein at prot-loc location -->
+<!ELEMENT RsStruct_attlist_protResidue (#PCDATA)>
+
+<!--alternative residue specified by variation sequence -->
+<!ELEMENT RsStruct_attlist_rsResidue (#PCDATA)>
+
+<!--GI of the structure neighbor -->
+<!ELEMENT RsStruct_attlist_structGi (%INTEGER;)>
+
+<!--position of the residue for the structure GI -->
+<!ELEMENT RsStruct_attlist_structLoc (%INTEGER;)>
+
+<!--residue specified for protein at struct-loc location -->
+<!ELEMENT RsStruct_attlist_structResidue (#PCDATA)>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct_rsStruct EMPTY>
+
+<!--data for an individual submission to dbSNP -->
+<!ELEMENT Ss (
+        Ss_attlist, 
+        Ss_sequence)>
+
+<!ELEMENT Ss_attlist (
+        Ss_attlist_ssId, 
+        Ss_attlist_handle, 
+        Ss_attlist_batchId, 
+        Ss_attlist_locSnpId?, 
+        Ss_attlist_subSnpClass?, 
+        Ss_attlist_orient?, 
+        Ss_attlist_strand?, 
+        Ss_attlist_molType?, 
+        Ss_attlist_buildId?, 
+        Ss_attlist_methodClass?, 
+        Ss_attlist_validated?, 
+        Ss_attlist_linkoutUrl?)>
+
+<!--dbSNP accession number for submission -->
+<!ELEMENT Ss_attlist_ssId (%INTEGER;)>
+
+<!--Tag for the submitting laboratory -->
+<!ELEMENT Ss_attlist_handle (#PCDATA)>
+
+<!--dbSNP number for batch submission -->
+<!ELEMENT Ss_attlist_batchId (%INTEGER;)>
+
+<!--
+submission (ss#)
+submitter ID
+-->
+<!ELEMENT Ss_attlist_locSnpId (#PCDATA)>
+
+<!--SubSNP classification by type of variation -->
+<!ELEMENT Ss_attlist_subSnpClass %ENUM;>
+<!ATTLIST Ss_attlist_subSnpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+<!--
+orientation of refsnp cluster members to refsnp cluster sequence
+ss flanking sequence is in same orientation as seq-ss-exemplar
+lanking sequence and alleles are reverse complement of refSNP as defined by ss exemplar
+-->
+<!ELEMENT Ss_attlist_orient %ENUM;>
+<!ATTLIST Ss_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--strand is defined as TOP/BOTTOM by nature of flanking nucleotide sequence -->
+<!ELEMENT Ss_attlist_strand %ENUM;>
+<!ATTLIST Ss_attlist_strand value (
+        top |
+        bottom
+        ) #REQUIRED >
+
+
+<!--moltype from Batch table -->
+<!ELEMENT Ss_attlist_molType %ENUM;>
+<!ATTLIST Ss_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--dbSNP build number when ss# was added to a refSNP (rs#) cluster -->
+<!ELEMENT Ss_attlist_buildId (%INTEGER;)>
+<!--
+class of method used to assay for the variation
+Denaturing High Pressure Liquid Chromatography used to detect SNP
+a hybridization method (e.g. chip) was used to assay for variation
+variation was mined from sequence alignment with software
+samples were sequenced and resulting alignment used to define variation
+-->
+<!ELEMENT Ss_attlist_methodClass %ENUM;>
+<!ATTLIST Ss_attlist_methodClass value (
+        dHPLC |
+        hybridize |
+        computed |
+        sSCP |
+        other |
+        unknown |
+        rFLP |
+        sequence
+        ) #REQUIRED >
+
+<!--
+subsnp has been experimentally validated by submitter
+subsnp has frequency data submitted
+has 2+ submissions, with 1+ submission assayed with a non-computational method
+-->
+<!ELEMENT Ss_attlist_validated %ENUM;>
+<!ATTLIST Ss_attlist_validated value (
+        by-submitter |
+        by-frequency |
+        by-cluster
+        ) #REQUIRED >
+
+
+<!--append loc-snp-id to this base URL to construct a pointer to submitter data. -->
+<!ELEMENT Ss_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Ss_sequence (
+        Ss_sequence_seq5?, 
+        Ss_sequence_observed, 
+        Ss_sequence_seq3?)>
+
+<!--
+5' sequence that flanks the variation
+5' sequence that flanks the variation
+-->
+<!ELEMENT Ss_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation
+-->
+<!ELEMENT Ss_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the variation
+3' sequence that flanks the variation
+-->
+<!ELEMENT Ss_sequence_seq3 (#PCDATA)>
+
diff --git a/dtd/Docsum_3_2.dtd b/dtd/Docsum_3_2.dtd
new file mode 100644
index 0000000..0c04c5e
--- /dev/null
+++ b/dtd/Docsum_3_2.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 02/11/2011 23:04:43
+     ============================================ -->
+
+<!-- Docsum_3_2.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % Docsum_3_2_module PUBLIC "-//NCBI//Docsum 3 2 Module//EN" "Docsum_3_2.mod.dtd">
+%Docsum_3_2_module;
diff --git a/dtd/Docsum_3_2.mod.dtd b/dtd/Docsum_3_2.mod.dtd
new file mode 100644
index 0000000..fd17c81
--- /dev/null
+++ b/dtd/Docsum_3_2.mod.dtd
@@ -0,0 +1,1418 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 02/11/2011 23:04:43
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "Docsum-3-2"
+================================================= -->
+
+<!--
+ ============================================
+ ::DATATOOL:: Generated from "docsum_3.2.xsd"
+ ::DATATOOL:: by application DATATOOL version 2.1.0
+ ::DATATOOL:: on 08/17/2010 10:11:21
+ ============================================
+ edited with XMLSPY v5 rel. 4 U (http://www.xmlspy.com) by Michael Kholodov (National Library of Medicine) 
+ edited with XMLSpy v2005 rel. 3 U (http://www.altova.com) by Michael Feolo (NCBI/NLM/NIH) 
+-->
+
+
+<!ELEMENT Assay (
+        Assay_attlist, 
+        Assay_method, 
+        Assay_taxonomy, 
+        Assay_strains?, 
+        Assay_comment?, 
+        Assay_citation?)>
+
+<!ELEMENT Assay_attlist (
+        Assay_attlist_handle?, 
+        Assay_attlist_batch?, 
+        Assay_attlist_batchId?, 
+        Assay_attlist_batchType?, 
+        Assay_attlist_molType?, 
+        Assay_attlist_sampleSize?, 
+        Assay_attlist_population?, 
+        Assay_attlist_linkoutUrl?)>
+
+<!ELEMENT Assay_attlist_handle (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batch (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batchId (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_batchType %ENUM;>
+<!ATTLIST Assay_attlist_batchType value (
+        snpassay |
+        validation |
+        doublehit
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_molType %ENUM;>
+<!ATTLIST Assay_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_population (#PCDATA)>
+
+<!ELEMENT Assay_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Assay_method (
+        Assay_method_eMethod?)>
+
+<!ELEMENT Assay_method_eMethod (
+        Assay_method_eMethod_attlist, 
+        Assay_method_eMethod_exception)>
+
+<!ELEMENT Assay_method_eMethod_attlist (
+        Assay_method_eMethod_attlist_name?, 
+        Assay_method_eMethod_attlist_id?)>
+
+<!--Submitters method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_name (#PCDATA)>
+
+<!--dbSNP method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_id (#PCDATA)>
+
+<!--
+description of deviation from/addition to
+										given method 
+-->
+<!ELEMENT Assay_method_eMethod_exception (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy (
+        Assay_taxonomy_attlist, 
+        Assay_taxonomy_taxonomy)>
+
+<!ELEMENT Assay_taxonomy_attlist (
+        Assay_taxonomy_attlist_id, 
+        Assay_taxonomy_attlist_organism?)>
+
+<!--
+NCBI taxonomy ID for
+									variation
+-->
+<!ELEMENT Assay_taxonomy_attlist_id (%INTEGER;)>
+
+<!ELEMENT Assay_taxonomy_attlist_organism (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy_taxonomy EMPTY>
+
+<!ELEMENT Assay_strains (Assay_strains_E*)>
+
+
+<!ELEMENT Assay_strains_E (#PCDATA)>
+
+<!ELEMENT Assay_comment (#PCDATA)>
+
+<!ELEMENT Assay_citation (Assay_citation_E*)>
+
+
+<!ELEMENT Assay_citation_E (#PCDATA)>
+
+<!--
+A collection of genome sequence records (curated gene regions (NG's),
+				contigs (NWNT's) and chromosomes (NC/AC's) produced by a genome sequence project.
+				Structure is populated from ContigInfo tables.
+-->
+<!ELEMENT Assembly (
+        Assembly_attlist, 
+        Assembly_component?, 
+        Assembly_snpStat)>
+
+<!ELEMENT Assembly_attlist (
+        Assembly_attlist_dbSnpBuild, 
+        Assembly_attlist_genomeBuild, 
+        Assembly_attlist_groupLabel?, 
+        Assembly_attlist_assemblySource?, 
+        Assembly_attlist_current?, 
+        Assembly_attlist_reference?)>
+
+<!--
+dbSNP build number defining the rsid set aligned to this
+						assembly
+-->
+<!ELEMENT Assembly_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--
+assembly build number with possible 'subbuild' version
+						numbers to reflect updates in gene annotation (human e.g. 34_3, 35_1,
+						36_1)
+-->
+<!ELEMENT Assembly_attlist_genomeBuild (#PCDATA)>
+
+<!--
+High-level classification of the assembly to distinguish
+						reference projects from alternate solutions. GroupLabel field from
+						organism/build-specific ContigInfo tables. "reference" is occasionally used
+						as the preferred assembly; standards will converge as additional organism
+						genome projects are finished. Note that some organism assembly names include
+						extended characters like '~' and '/' that may be incompatible with OS
+						filename conventions.
+-->
+<!ELEMENT Assembly_attlist_groupLabel (#PCDATA)>
+
+<!--
+Name of the group(s) or organization(s) that generated the
+						assembly
+-->
+<!ELEMENT Assembly_attlist_assemblySource (#PCDATA)>
+
+<!--Marks the current genomic assembly -->
+<!ELEMENT Assembly_attlist_current EMPTY>
+<!ATTLIST Assembly_attlist_current value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_attlist_reference EMPTY>
+<!ATTLIST Assembly_attlist_reference value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_component (Component*)>
+
+<!ELEMENT Assembly_snpStat (
+        Assembly_snpStat_attlist, 
+        Assembly_snpStat_snpStat)>
+
+<!ELEMENT Assembly_snpStat_attlist (
+        Assembly_snpStat_attlist_mapWeight, 
+        Assembly_snpStat_attlist_chromCount?, 
+        Assembly_snpStat_attlist_placedContigCount?, 
+        Assembly_snpStat_attlist_unplacedContigCount?, 
+        Assembly_snpStat_attlist_seqlocCount?, 
+        Assembly_snpStat_attlist_hapCount?)>
+<!--
+summary measure of placement precision in the
+									assembly
+-->
+<!ELEMENT Assembly_snpStat_attlist_mapWeight %ENUM;>
+<!ATTLIST Assembly_snpStat_attlist_mapWeight value (
+        unmapped |
+        unique-in-contig |
+        two-hits-in-contig |
+        less-10-hits |
+        multiple-hits
+        ) #REQUIRED >
+
+
+<!--
+number of distinct chromosomes in the
+									mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_chromCount (%INTEGER;)>
+
+<!--
+number of distinct contigs [ gi |
+									accession[.version] ] in the mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_placedContigCount (%INTEGER;)>
+
+<!--
+number of sequence postions to a contig with
+									unknown chromosomal assignment
+-->
+<!ELEMENT Assembly_snpStat_attlist_unplacedContigCount (%INTEGER;)>
+
+<!--
+total number of sequence positions in the
+									mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_seqlocCount (%INTEGER;)>
+
+<!--
+Number of hits to alternative genomic haplotypes
+									(e.g. HLA DR region, KIR, or pseudo-autosomal regions like PAR)
+									within the assembly mapset. Note that positions on haplotypes
+									defined in other assemblies (a different assembly_group_label
+									value) will not be counted in this value.
+-->
+<!ELEMENT Assembly_snpStat_attlist_hapCount (%INTEGER;)>
+
+<!ELEMENT Assembly_snpStat_snpStat EMPTY>
+
+<!--
+URL value from dbSNP_main.BaseURL links table. attributes provide
+				context information and URL id that is referenced within individual refSNP
+				objects.
+-->
+<!ELEMENT BaseURL (
+        BaseURL_attlist, 
+        BaseURL_baseURL)>
+
+<!ELEMENT BaseURL_attlist (
+        BaseURL_attlist_urlId?, 
+        BaseURL_attlist_resourceName?, 
+        BaseURL_attlist_resourceId?)>
+
+<!--
+Resource identifier from
+								dbSNP_main.baseURL.
+-->
+<!ELEMENT BaseURL_attlist_urlId (%INTEGER;)>
+
+<!--Name of linked resource -->
+<!ELEMENT BaseURL_attlist_resourceName (#PCDATA)>
+
+<!--
+identifier expected by resource for
+								URL
+-->
+<!ELEMENT BaseURL_attlist_resourceId (#PCDATA)>
+
+<!--
+URL value from dbSNP_main.BaseURL links table. attributes provide
+				context information and URL id that is referenced within individual refSNP
+				objects.
+-->
+<!ELEMENT BaseURL_baseURL (#PCDATA)>
+
+
+<!ELEMENT Component (
+        Component_attlist, 
+        Component_mapLoc)>
+
+<!ELEMENT Component_attlist (
+        Component_attlist_componentType?, 
+        Component_attlist_ctgId?, 
+        Component_attlist_accession?, 
+        Component_attlist_name?, 
+        Component_attlist_chromosome?, 
+        Component_attlist_start?, 
+        Component_attlist_end?, 
+        Component_attlist_orientation?, 
+        Component_attlist_gi?, 
+        Component_attlist_groupTerm?, 
+        Component_attlist_contigLabel?)>
+<!--
+type of component: chromosome, contig, gene_region,
+						etc.
+-->
+<!ELEMENT Component_attlist_componentType %ENUM;>
+<!ATTLIST Component_attlist_componentType value (
+        contig |
+        mrna
+        ) #REQUIRED >
+
+
+<!--
+dbSNP contig_id used to join on contig hit / mapset data to
+						these assembly properties
+-->
+<!ELEMENT Component_attlist_ctgId (%INTEGER;)>
+
+<!--
+Accession[.version] for the sequence
+						component
+-->
+<!ELEMENT Component_attlist_accession (#PCDATA)>
+
+<!--
+contig name defined as either a submitter local id, element
+						of a whole genome assembly set, or internal NCBI local
+						id
+-->
+<!ELEMENT Component_attlist_name (#PCDATA)>
+
+<!--
+Organism appropriate chromosome tag, 'Un' reserved for
+						default case of unplaced components
+-->
+<!ELEMENT Component_attlist_chromosome (#PCDATA)>
+
+<!--
+component starting position on the chromosome (base 0
+						inclusive)
+-->
+<!ELEMENT Component_attlist_start (%INTEGER;)>
+
+<!--
+component ending position on the chromosome (base 0
+						inclusive)
+-->
+<!ELEMENT Component_attlist_end (%INTEGER;)>
+<!--
+orientation of this component to chromosome, forward (fwd) =
+						0, reverse (rev) = 1, unknown = NULL in
+						ContigInfo.orient.
+-->
+<!ELEMENT Component_attlist_orientation %ENUM;>
+<!ATTLIST Component_attlist_orientation value (
+        fwd |
+        rev |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+NCBI gi for component sequence (equivalent to
+						accession.version) for nucleotide sequence.
+-->
+<!ELEMENT Component_attlist_gi (#PCDATA)>
+
+<!--
+Identifier label for the genome assembly that defines the
+						contigs in this mapset and their placement within the organism genome.
+-->
+<!ELEMENT Component_attlist_groupTerm (#PCDATA)>
+
+<!--Display label for component -->
+<!ELEMENT Component_attlist_contigLabel (#PCDATA)>
+
+<!ELEMENT Component_mapLoc (MapLoc*)>
+
+<!--Set of dbSNP refSNP docsums, version 3.2 -->
+<!ELEMENT ExchangeSet (
+        ExchangeSet_attlist, 
+        ExchangeSet_sourceDatabase, 
+        ExchangeSet_rs?, 
+        ExchangeSet_assay?, 
+        ExchangeSet_query?, 
+        ExchangeSet_summary, 
+        ExchangeSet_baseURL)>
+
+<!ELEMENT ExchangeSet_attlist (
+        ExchangeSet_attlist_setType?, 
+        ExchangeSet_attlist_setDepth?, 
+        ExchangeSet_attlist_specVersion?, 
+        ExchangeSet_attlist_dbSnpBuild?, 
+        ExchangeSet_attlist_generated?)>
+
+<!--
+set-type: full dump; from query; single
+						refSNP
+-->
+<!ELEMENT ExchangeSet_attlist_setType (#PCDATA)>
+
+<!--
+content depth: brief XML (only refSNP properties and summary
+						subSNP element content); full XML (full refSNP, full subSNP content; all
+						flanking sequences) 
+-->
+<!ELEMENT ExchangeSet_attlist_setDepth (#PCDATA)>
+
+<!--
+version number of docsum.asn/docsum.dtd
+						specification
+-->
+<!ELEMENT ExchangeSet_attlist_specVersion (#PCDATA)>
+
+<!--build number of database for this export -->
+<!ELEMENT ExchangeSet_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--Generated date -->
+<!ELEMENT ExchangeSet_attlist_generated (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase (
+        ExchangeSet_sourceDatabase_attlist, 
+        ExchangeSet_sourceDatabase_sourceDatabase)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_attlist (
+        ExchangeSet_sourceDatabase_attlist_taxId, 
+        ExchangeSet_sourceDatabase_attlist_organism, 
+        ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr?, 
+        ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr?)>
+
+<!--
+NCBI taxonomy ID for
+									variation
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_taxId (%INTEGER;)>
+
+<!--
+common name for species used as part of database
+									name.
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_organism (#PCDATA)>
+
+<!--organism abbreviation used in dbSNP. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr (#PCDATA)>
+
+<!--
+organism abbreviation used within NCBI genome
+									pipeline data dumps.
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_sourceDatabase EMPTY>
+
+<!ELEMENT ExchangeSet_rs (Rs*)>
+
+<!ELEMENT ExchangeSet_assay (Assay)>
+
+<!ELEMENT ExchangeSet_query (
+        ExchangeSet_query_attlist, 
+        ExchangeSet_query_query)>
+
+<!ELEMENT ExchangeSet_query_attlist (
+        ExchangeSet_query_attlist_date?, 
+        ExchangeSet_query_attlist_string?)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT ExchangeSet_query_attlist_date (#PCDATA)>
+
+<!--
+Query terms or search
+									constraints
+-->
+<!ELEMENT ExchangeSet_query_attlist_string (#PCDATA)>
+
+<!ELEMENT ExchangeSet_query_query EMPTY>
+
+<!ELEMENT ExchangeSet_summary (
+        ExchangeSet_summary_attlist, 
+        ExchangeSet_summary_summary)>
+
+<!ELEMENT ExchangeSet_summary_attlist (
+        ExchangeSet_summary_attlist_numRsIds?, 
+        ExchangeSet_summary_attlist_totalSeqLength?, 
+        ExchangeSet_summary_attlist_numContigHits?, 
+        ExchangeSet_summary_attlist_numGeneHits?, 
+        ExchangeSet_summary_attlist_numGiHits?, 
+        ExchangeSet_summary_attlist_num3dStructs?, 
+        ExchangeSet_summary_attlist_numAlleleFreqs?, 
+        ExchangeSet_summary_attlist_numStsHits?, 
+        ExchangeSet_summary_attlist_numUnigeneCids?)>
+
+<!--Total number of refsnp-ids in this exchange set -->
+<!ELEMENT ExchangeSet_summary_attlist_numRsIds (%INTEGER;)>
+
+<!--
+Total length of exemplar flanking
+									sequences
+-->
+<!ELEMENT ExchangeSet_summary_attlist_totalSeqLength (%INTEGER;)>
+
+<!--
+Total number of contig locations from
+									SNPContigLoc
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numContigHits (%INTEGER;)>
+
+<!--
+Total number of locus ids from
+									SNPContigLocusId
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numGeneHits (%INTEGER;)>
+
+<!--
+Total number of gi hits from
+									MapLink
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numGiHits (%INTEGER;)>
+
+<!--
+Total number of 3D structures from
+									SNP3D
+-->
+<!ELEMENT ExchangeSet_summary_attlist_num3dStructs (%INTEGER;)>
+
+<!--
+Total number of allele frequences from
+									SubPopAllele
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numAlleleFreqs (%INTEGER;)>
+
+<!--
+Total number of STS hits from
+									SnpInSts
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numStsHits (%INTEGER;)>
+
+<!--
+Total number of unigene cluster ids from
+									UnigeneSnp
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numUnigeneCids (%INTEGER;)>
+
+<!ELEMENT ExchangeSet_summary_summary EMPTY>
+
+<!ELEMENT ExchangeSet_baseURL (BaseURL*)>
+
+<!--
+functional relationship of SNP (and possibly alleles) to genes at
+				contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx
+				tables.
+-->
+<!ELEMENT FxnSet (
+        FxnSet_attlist, 
+        FxnSet_fxnSet)>
+
+<!ELEMENT FxnSet_attlist (
+        FxnSet_attlist_geneId?, 
+        FxnSet_attlist_symbol?, 
+        FxnSet_attlist_mrnaAcc?, 
+        FxnSet_attlist_mrnaVer?, 
+        FxnSet_attlist_protAcc?, 
+        FxnSet_attlist_protVer?, 
+        FxnSet_attlist_fxnClass?, 
+        FxnSet_attlist_readingFrame?, 
+        FxnSet_attlist_allele?, 
+        FxnSet_attlist_residue?, 
+        FxnSet_attlist_aaPosition?, 
+        FxnSet_attlist_mrnaPosition?)>
+
+<!--gene-id of gene as aligned to contig -->
+<!ELEMENT FxnSet_attlist_geneId (%INTEGER;)>
+
+<!--
+symbol (official if present in Entrez Gene) of
+						gene
+-->
+<!ELEMENT FxnSet_attlist_symbol (#PCDATA)>
+
+<!--mRNA accession if variation in transcript -->
+<!ELEMENT FxnSet_attlist_mrnaAcc (#PCDATA)>
+
+<!--
+mRNA sequence version if variation is in
+						transcripot
+-->
+<!ELEMENT FxnSet_attlist_mrnaVer (%INTEGER;)>
+
+<!--protein accession if variation in protein -->
+<!ELEMENT FxnSet_attlist_protAcc (#PCDATA)>
+
+<!--
+protein version if variation is in
+						protein
+-->
+<!ELEMENT FxnSet_attlist_protVer (%INTEGER;)>
+<!--
+variation in region of gene, but not in
+									transcript - deprecated
+-->
+<!ELEMENT FxnSet_attlist_fxnClass %ENUM;>
+<!ATTLIST FxnSet_attlist_fxnClass value (
+        locus-region |
+        coding-unknown |
+        coding-synonymous |
+        coding-nonsynonymous |
+        mrna-utr |
+        intron |
+        splice-site |
+        reference |
+        coding-exception |
+        synonymy-unknown |
+        gene-segment |
+        near-gene-3 |
+        near-gene-5 |
+        nonsense |
+        missense |
+        frameshift |
+        utr-3 |
+        utr-5 |
+        splice-3 |
+        splice-5 |
+        cds-indel |
+        stop-gain |
+        stop-loss
+        ) #REQUIRED >
+
+
+<!ELEMENT FxnSet_attlist_readingFrame (%INTEGER;)>
+
+<!--
+variation allele: * suffix indicates allele of contig at this
+						location
+-->
+<!ELEMENT FxnSet_attlist_allele (#PCDATA)>
+
+<!--translated amino acid residue for allele -->
+<!ELEMENT FxnSet_attlist_residue (#PCDATA)>
+
+<!--
+position of the variant residue in peptide
+						sequence
+-->
+<!ELEMENT FxnSet_attlist_aaPosition (%INTEGER;)>
+
+<!ELEMENT FxnSet_attlist_mrnaPosition (%INTEGER;)>
+
+<!--
+functional relationship of SNP (and possibly alleles) to genes at
+				contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx
+				tables.
+-->
+<!ELEMENT FxnSet_fxnSet EMPTY>
+
+<!--
+Position of a single hit of a variation on a
+				contig
+-->
+<!ELEMENT MapLoc (
+        MapLoc_attlist, 
+        MapLoc_fxnSet?)>
+
+<!ELEMENT MapLoc_attlist (
+        MapLoc_attlist_asnFrom, 
+        MapLoc_attlist_asnTo, 
+        MapLoc_attlist_locType, 
+        MapLoc_attlist_alnQuality?, 
+        MapLoc_attlist_orient?, 
+        MapLoc_attlist_physMapInt?, 
+        MapLoc_attlist_leftFlankNeighborPos?, 
+        MapLoc_attlist_rightFlankNeighborPos?, 
+        MapLoc_attlist_leftContigNeighborPos?, 
+        MapLoc_attlist_rightContigNeighborPos?, 
+        MapLoc_attlist_numberOfMismatches?, 
+        MapLoc_attlist_numberOfDeletions?, 
+        MapLoc_attlist_numberOfInsertions?)>
+
+<!--
+beginning of variation as feature on
+						contig
+-->
+<!ELEMENT MapLoc_attlist_asnFrom (%INTEGER;)>
+
+<!--
+end position of variation as feature on
+						contig
+-->
+<!ELEMENT MapLoc_attlist_asnTo (%INTEGER;)>
+<!--
+defines the seq-loc symbol if asn_from !=
+						asn_to
+-->
+<!ELEMENT MapLoc_attlist_locType %ENUM;>
+<!ATTLIST MapLoc_attlist_locType value (
+        insertion |
+        exact |
+        deletion |
+        range-ins |
+        range-exact |
+        range-del
+        ) #REQUIRED >
+
+
+<!--alignment qualiity -->
+<!ELEMENT MapLoc_attlist_alnQuality (%REAL;)>
+<!--
+orientation of refSNP sequence to contig
+						sequence
+-->
+<!ELEMENT MapLoc_attlist_orient %ENUM;>
+<!ATTLIST MapLoc_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--
+chromosome position as integer for
+						sorting
+-->
+<!ELEMENT MapLoc_attlist_physMapInt (%INTEGER;)>
+
+<!--
+nearest aligned position in 5' flanking sequence of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_leftFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' flanking sequence of snp -->
+<!ELEMENT MapLoc_attlist_rightFlankNeighborPos (%INTEGER;)>
+
+<!--
+nearest aligned position in 5' contig alignment of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_leftContigNeighborPos (%INTEGER;)>
+
+<!--
+nearest aligned position in 3' contig alignment of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_rightContigNeighborPos (%INTEGER;)>
+
+<!--
+number of Mismatched positions in this
+						alignment
+-->
+<!ELEMENT MapLoc_attlist_numberOfMismatches (%INTEGER;)>
+
+<!--number of deletions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfDeletions (%INTEGER;)>
+
+<!--number of insetions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfInsertions (%INTEGER;)>
+
+<!ELEMENT MapLoc_fxnSet (FxnSet*)>
+
+
+<!ELEMENT PrimarySequence (
+        PrimarySequence_attlist, 
+        PrimarySequence_mapLoc)>
+
+<!ELEMENT PrimarySequence_attlist (
+        PrimarySequence_attlist_dbSnpBuild, 
+        PrimarySequence_attlist_gi, 
+        PrimarySequence_attlist_source?, 
+        PrimarySequence_attlist_accession?)>
+
+<!ELEMENT PrimarySequence_attlist_dbSnpBuild (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_gi (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_source %ENUM;>
+<!ATTLIST PrimarySequence_attlist_source value (
+        submitter |
+        blastmb |
+        xm |
+        remap |
+        hgvs
+        ) #REQUIRED >
+
+
+<!ELEMENT PrimarySequence_attlist_accession (#PCDATA)>
+
+<!ELEMENT PrimarySequence_mapLoc (MapLoc*)>
+
+<!--
+defines the docsum structure for refSNP clusters, where a refSNP
+				cluster (rs) is a grouping of individual dbSNP submissions that all refer to the
+				same variation. The refsnp provides a single unified record for annotation of NCBI
+				resources such as reference genome sequence.
+-->
+<!ELEMENT Rs (
+        Rs_attlist, 
+        Rs_het?, 
+        Rs_validation, 
+        Rs_create, 
+        Rs_update?, 
+        Rs_sequence, 
+        Rs_ss, 
+        Rs_assembly?, 
+        Rs_primarySequence?, 
+        Rs_rsStruct?, 
+        Rs_rsLinkout?, 
+        Rs_mergeHistory?, 
+        Rs_hgvs?)>
+
+<!ELEMENT Rs_attlist (
+        Rs_attlist_rsId, 
+        Rs_attlist_snpClass, 
+        Rs_attlist_snpType, 
+        Rs_attlist_molType, 
+        Rs_attlist_validProbMin?, 
+        Rs_attlist_validProbMax?, 
+        Rs_attlist_genotype?, 
+        Rs_attlist_bitField?, 
+        Rs_attlist_taxId?)>
+
+<!--refSNP (rs) number -->
+<!ELEMENT Rs_attlist_rsId (%INTEGER;)>
+
+<!ELEMENT Rs_attlist_snpClass %ENUM;>
+<!ATTLIST Rs_attlist_snpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_snpType %ENUM;>
+<!ATTLIST Rs_attlist_snpType value (
+        notwithdrawn |
+        artifact |
+        gene-duplication |
+        duplicate-submission |
+        notspecified |
+        ambiguous-location |
+        low-map-quality
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_molType %ENUM;>
+<!ATTLIST Rs_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+minimum reported success rate of all submissions in
+						cluster
+-->
+<!ELEMENT Rs_attlist_validProbMin (%INTEGER;)>
+
+<!--
+maximum reported success rate of all submissions in
+						cluster
+-->
+<!ELEMENT Rs_attlist_validProbMax (%INTEGER;)>
+
+<!--
+at least one genotype reported for this
+						refSNP
+-->
+<!ELEMENT Rs_attlist_genotype EMPTY>
+<!ATTLIST Rs_attlist_genotype value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_bitField (#PCDATA)>
+
+<!ELEMENT Rs_attlist_taxId (%INTEGER;)>
+
+<!ELEMENT Rs_het (
+        Rs_het_attlist, 
+        Rs_het_het)>
+
+<!ELEMENT Rs_het_attlist (
+        Rs_het_attlist_type, 
+        Rs_het_attlist_value, 
+        Rs_het_attlist_stdError?)>
+<!--
+Est=Estimated average het from allele
+									frequencies, Obs=Observed from genotype data
+-->
+<!ELEMENT Rs_het_attlist_type %ENUM;>
+<!ATTLIST Rs_het_attlist_type value (
+        est |
+        obs
+        ) #REQUIRED >
+
+
+<!--Heterozygosity -->
+<!ELEMENT Rs_het_attlist_value (%REAL;)>
+
+<!--
+Standard error of Het
+									estimate
+-->
+<!ELEMENT Rs_het_attlist_stdError (%REAL;)>
+
+<!ELEMENT Rs_het_het EMPTY>
+
+<!ELEMENT Rs_validation (
+        Rs_validation_attlist, 
+        Rs_validation_otherPopBatchId?, 
+        Rs_validation_twoHit2AlleleBatchId?, 
+        Rs_validation_frequencyClass?, 
+        Rs_validation_hapMapPhase?, 
+        Rs_validation_tGPPhase?, 
+        Rs_validation_suspectEvidence?)>
+
+<!ELEMENT Rs_validation_attlist (
+        Rs_validation_attlist_byCluster?, 
+        Rs_validation_attlist_byFrequency?, 
+        Rs_validation_attlist_byOtherPop?, 
+        Rs_validation_attlist_by2Hit2Allele?, 
+        Rs_validation_attlist_byHapMap?, 
+        Rs_validation_attlist_by1000G?, 
+        Rs_validation_attlist_suspect?)>
+
+<!--
+at least one subsnp in cluster has frequency data
+									submitted
+-->
+<!ELEMENT Rs_validation_attlist_byCluster EMPTY>
+<!ATTLIST Rs_validation_attlist_byCluster value ( true | false ) #REQUIRED >
+
+
+<!--Validated by allele frequency -->
+<!ELEMENT Rs_validation_attlist_byFrequency EMPTY>
+<!ATTLIST Rs_validation_attlist_byFrequency value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_validation_attlist_byOtherPop EMPTY>
+<!ATTLIST Rs_validation_attlist_byOtherPop value ( true | false ) #REQUIRED >
+
+
+<!--
+cluster has 2+ submissions, with 1+ submissions
+									assayed with a non-computational method
+-->
+<!ELEMENT Rs_validation_attlist_by2Hit2Allele EMPTY>
+<!ATTLIST Rs_validation_attlist_by2Hit2Allele value ( true | false ) #REQUIRED >
+
+
+<!--Validated by HapMap Project -->
+<!ELEMENT Rs_validation_attlist_byHapMap EMPTY>
+<!ATTLIST Rs_validation_attlist_byHapMap value ( true | false ) #REQUIRED >
+
+
+<!--Validated by 1000 Genomes Project -->
+<!ELEMENT Rs_validation_attlist_by1000G EMPTY>
+<!ATTLIST Rs_validation_attlist_by1000G value ( true | false ) #REQUIRED >
+
+
+<!--Suspected to be false SNP -->
+<!ELEMENT Rs_validation_attlist_suspect EMPTY>
+<!ATTLIST Rs_validation_attlist_suspect value ( true | false ) #REQUIRED >
+
+
+<!--
+dbSNP batch-id's for other pop snp validation
+										data.
+-->
+<!ELEMENT Rs_validation_otherPopBatchId (Rs_validation_otherPopBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_otherPopBatchId_E (%INTEGER;)>
+
+<!--
+dbSNP batch-id's for double-hit snp
+										validation data. Use batch-id to get methods,
+										etc.
+-->
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId (Rs_validation_twoHit2AlleleBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId_E (%INTEGER;)>
+
+<!--
+Frequency validation class
+										(1) low frequency variation that is cited in journal and other reputable sources 
+										(2) greater than 5 percent minor allele freq in each and all populations 
+										(4) greater than 5 percent minor allele freq in 1+ populations  
+										(8) if the variant has 2+ minor allele count based on freq or genotype data
+										(16) less than 1 percent minor allele freq in each and all populations 
+										(32) less than 1 percent minor freq in 1+ populations
+-->
+<!ELEMENT Rs_validation_frequencyClass (Rs_validation_frequencyClass_E*)>
+
+
+<!ELEMENT Rs_validation_frequencyClass_E (%INTEGER;)>
+
+<!--
+alidated by HapMap Project
+										phase1-genotyped (1),  Phase 1 genotyped; filtered, non-redundant
+										phase2-genotyped (2),  Phase 2 genotyped; filtered, non-redundant
+										phase3-genotyped (4)   Phase 3 genotyped; filtered, non-redundant
+-->
+<!ELEMENT Rs_validation_hapMapPhase (Rs_validation_hapMapPhase_E*)>
+
+
+<!ELEMENT Rs_validation_hapMapPhase_E (%INTEGER;)>
+
+<!--
+Validated by 1000 Genomes Project (TGP)
+										pilot 1 (1),
+										pilot 2 (2),
+										pilot 3 (4)
+-->
+<!ELEMENT Rs_validation_tGPPhase (Rs_validation_tGPPhase_E*)>
+
+
+<!ELEMENT Rs_validation_tGPPhase_E (%INTEGER;)>
+
+<!--
+Suspected to be false SNP evidence
+										Single Nucleotide Difference - paralogous genes (1),
+										Genotype or base calling errors  (2),
+										Submission evidence or errors (4),
+										Others (8)
+-->
+<!ELEMENT Rs_validation_suspectEvidence (Rs_validation_suspectEvidence_E*)>
+
+
+<!ELEMENT Rs_validation_suspectEvidence_E (%INTEGER;)>
+<!--
+date the refsnp cluster was
+							instantiated
+date the refsnp cluster was
+							instantiated
+-->
+<!ELEMENT Rs_create (
+        Rs_create_attlist, 
+        Rs_create_create)>
+
+<!ELEMENT Rs_create_attlist (
+        Rs_create_attlist_build?, 
+        Rs_create_attlist_date?)>
+
+<!--
+build number when the cluster was
+									created
+-->
+<!ELEMENT Rs_create_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_create_attlist_date (#PCDATA)>
+
+<!--
+date the refsnp cluster was
+							instantiated
+-->
+<!ELEMENT Rs_create_create EMPTY>
+<!--
+most recent date the cluster was updated (member added or
+							deleted)
+most recent date the cluster was updated (member added or
+							deleted)
+-->
+<!ELEMENT Rs_update (
+        Rs_update_attlist, 
+        Rs_update_update)>
+
+<!ELEMENT Rs_update_attlist (
+        Rs_update_attlist_build?, 
+        Rs_update_attlist_date?)>
+
+<!--
+build number when the cluster was
+									updated
+-->
+<!ELEMENT Rs_update_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_update_attlist_date (#PCDATA)>
+
+<!--
+most recent date the cluster was updated (member added or
+							deleted)
+-->
+<!ELEMENT Rs_update_update EMPTY>
+
+<!ELEMENT Rs_sequence (
+        Rs_sequence_attlist, 
+        Rs_sequence_seq5?, 
+        Rs_sequence_observed, 
+        Rs_sequence_seq3?)>
+
+<!ELEMENT Rs_sequence_attlist (
+        Rs_sequence_attlist_exemplarSs, 
+        Rs_sequence_attlist_ancestralAllele?)>
+
+<!--
+dbSNP ss# selected as source of refSNP flanking
+									sequence, ss# part of ss-list below 
+-->
+<!ELEMENT Rs_sequence_attlist_exemplarSs (%INTEGER;)>
+
+<!ELEMENT Rs_sequence_attlist_ancestralAllele (#PCDATA)>
+
+<!--
+5' sequence that flanks the
+										variation
+-->
+<!ELEMENT Rs_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in
+										ss-list members, correcting for reverse complementation of
+										members reported in reverse orientation
+-->
+<!ELEMENT Rs_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the
+										variation
+-->
+<!ELEMENT Rs_sequence_seq3 (#PCDATA)>
+
+<!ELEMENT Rs_ss (Ss*)>
+
+<!ELEMENT Rs_assembly (Assembly*)>
+
+<!ELEMENT Rs_primarySequence (PrimarySequence*)>
+
+<!ELEMENT Rs_rsStruct (RsStruct*)>
+
+<!ELEMENT Rs_rsLinkout (RsLinkout*)>
+
+<!ELEMENT Rs_mergeHistory (Rs_mergeHistory_E*)>
+
+
+<!ELEMENT Rs_mergeHistory_E (
+        Rs_mergeHistory_E_attlist, 
+        Rs_mergeHistory_E_mergeHistory)>
+
+<!ELEMENT Rs_mergeHistory_E_attlist (
+        Rs_mergeHistory_E_attlist_rsId, 
+        Rs_mergeHistory_E_attlist_buildId?, 
+        Rs_mergeHistory_E_attlist_orientFlip?)>
+
+<!--
+previously issued rs id whose member assays have
+									now been merged
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_rsId (%INTEGER;)>
+
+<!--
+build id when rs id was merged into parent
+									rs
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_buildId (%INTEGER;)>
+
+<!--
+TRUE if strand of rs id is reverse to parent
+									object's current strand
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_orientFlip EMPTY>
+<!ATTLIST Rs_mergeHistory_E_attlist_orientFlip value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_mergeHistory_E_mergeHistory EMPTY>
+
+<!-- HGVS name list  -->
+<!ELEMENT Rs_hgvs (Rs_hgvs_E*)>
+
+
+<!ELEMENT Rs_hgvs_E (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout (
+        RsLinkout_attlist, 
+        RsLinkout_rsLinkout)>
+
+<!ELEMENT RsLinkout_attlist (
+        RsLinkout_attlist_resourceId, 
+        RsLinkout_attlist_linkValue)>
+
+<!--BaseURLList.url_id -->
+<!ELEMENT RsLinkout_attlist_resourceId (#PCDATA)>
+
+<!--
+value to append to ResourceURL.base-url for complete
+						link
+-->
+<!ELEMENT RsLinkout_attlist_linkValue (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout_rsLinkout EMPTY>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct (
+        RsStruct_attlist, 
+        RsStruct_rsStruct)>
+
+<!ELEMENT RsStruct_attlist (
+        RsStruct_attlist_protAcc?, 
+        RsStruct_attlist_protGi?, 
+        RsStruct_attlist_protLoc?, 
+        RsStruct_attlist_protResidue?, 
+        RsStruct_attlist_rsResidue?, 
+        RsStruct_attlist_structGi?, 
+        RsStruct_attlist_structLoc?, 
+        RsStruct_attlist_structResidue?)>
+
+<!--accession of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protAcc (#PCDATA)>
+
+<!--GI of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protGi (%INTEGER;)>
+
+<!--
+position of the residue for the protein
+						GI
+-->
+<!ELEMENT RsStruct_attlist_protLoc (%INTEGER;)>
+
+<!--
+residue specified for protein at prot-loc
+						location
+-->
+<!ELEMENT RsStruct_attlist_protResidue (#PCDATA)>
+
+<!--
+alternative residue specified by variation
+						sequence
+-->
+<!ELEMENT RsStruct_attlist_rsResidue (#PCDATA)>
+
+<!--GI of the structure neighbor -->
+<!ELEMENT RsStruct_attlist_structGi (%INTEGER;)>
+
+<!--
+position of the residue for the structure
+						GI
+-->
+<!ELEMENT RsStruct_attlist_structLoc (%INTEGER;)>
+
+<!--
+residue specified for protein at struct-loc
+						location
+-->
+<!ELEMENT RsStruct_attlist_structResidue (#PCDATA)>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct_rsStruct EMPTY>
+
+<!--data for an individual submission to dbSNP -->
+<!ELEMENT Ss (
+        Ss_attlist, 
+        Ss_sequence)>
+
+<!ELEMENT Ss_attlist (
+        Ss_attlist_ssId, 
+        Ss_attlist_handle, 
+        Ss_attlist_batchId, 
+        Ss_attlist_locSnpId?, 
+        Ss_attlist_subSnpClass?, 
+        Ss_attlist_orient?, 
+        Ss_attlist_strand?, 
+        Ss_attlist_molType?, 
+        Ss_attlist_buildId?, 
+        Ss_attlist_methodClass?, 
+        Ss_attlist_validated?, 
+        Ss_attlist_linkoutUrl?, 
+        Ss_attlist_ssAlias?, 
+        Ss_attlist_alleleOrigin?, 
+        Ss_attlist_clinicalSignificance?)>
+
+<!--dbSNP accession number for submission -->
+<!ELEMENT Ss_attlist_ssId (%INTEGER;)>
+
+<!--Tag for the submitting laboratory -->
+<!ELEMENT Ss_attlist_handle (#PCDATA)>
+
+<!--dbSNP number for batch submission -->
+<!ELEMENT Ss_attlist_batchId (%INTEGER;)>
+
+<!--submission (ss#) submitter ID -->
+<!ELEMENT Ss_attlist_locSnpId (#PCDATA)>
+<!--
+SubSNP classification by type of
+						variation
+-->
+<!ELEMENT Ss_attlist_subSnpClass %ENUM;>
+<!ATTLIST Ss_attlist_subSnpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+<!--
+orientation of refsnp cluster members to refsnp cluster
+						sequence
+-->
+<!ELEMENT Ss_attlist_orient %ENUM;>
+<!ATTLIST Ss_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+<!--
+strand is defined as TOP/BOTTOM by nature of flanking
+						nucleotide sequence
+-->
+<!ELEMENT Ss_attlist_strand %ENUM;>
+<!ATTLIST Ss_attlist_strand value (
+        top |
+        bottom
+        ) #REQUIRED >
+
+
+<!--moltype from Batch table -->
+<!ELEMENT Ss_attlist_molType %ENUM;>
+<!ATTLIST Ss_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+dbSNP build number when ss# was added to a refSNP (rs#)
+						cluster
+-->
+<!ELEMENT Ss_attlist_buildId (%INTEGER;)>
+<!--
+class of method used to assay for the
+						variation
+-->
+<!ELEMENT Ss_attlist_methodClass %ENUM;>
+<!ATTLIST Ss_attlist_methodClass value (
+        dHPLC |
+        hybridize |
+        computed |
+        sSCP |
+        other |
+        unknown |
+        rFLP |
+        sequence
+        ) #REQUIRED >
+
+<!--
+subsnp has been experimentally validated by
+									submitter
+-->
+<!ELEMENT Ss_attlist_validated %ENUM;>
+<!ATTLIST Ss_attlist_validated value (
+        by-submitter |
+        by-frequency |
+        by-cluster
+        ) #REQUIRED >
+
+
+<!--
+append loc-snp-id to this base URL to construct a pointer to
+						submitter data.
+-->
+<!ELEMENT Ss_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Ss_attlist_ssAlias (#PCDATA)>
+
+<!ELEMENT Ss_attlist_alleleOrigin %ENUM;>
+<!ATTLIST Ss_attlist_alleleOrigin value (
+        unknown |
+        germline |
+        somatic |
+        inherited |
+        paternal |
+        maternal |
+        de-novo |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT Ss_attlist_clinicalSignificance %ENUM;>
+<!ATTLIST Ss_attlist_clinicalSignificance value (
+        unknown |
+        untested |
+        non-pathogenic |
+        probable-non-pathogenic |
+        probable-pathogenic |
+        pathogenic |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT Ss_sequence (
+        Ss_sequence_seq5?, 
+        Ss_sequence_observed, 
+        Ss_sequence_seq3?)>
+
+<!--
+5' sequence that flanks the
+										variation
+-->
+<!ELEMENT Ss_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in
+										ss-list members, correcting for reverse complementation of
+										memebers reported in reverse orientation
+-->
+<!ELEMENT Ss_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the
+										variation
+-->
+<!ELEMENT Ss_sequence_seq3 (#PCDATA)>
+
diff --git a/dtd/Docsum_3_3.dtd b/dtd/Docsum_3_3.dtd
new file mode 100644
index 0000000..36da5a0
--- /dev/null
+++ b/dtd/Docsum_3_3.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 04/01/2011 23:04:41
+     ============================================ -->
+
+<!-- Docsum_3_3.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % Docsum_3_3_module PUBLIC "-//NCBI//Docsum 3 3 Module//EN" "Docsum_3_3.mod.dtd">
+%Docsum_3_3_module;
diff --git a/dtd/Docsum_3_3.mod.dtd b/dtd/Docsum_3_3.mod.dtd
new file mode 100644
index 0000000..c1c1169
--- /dev/null
+++ b/dtd/Docsum_3_3.mod.dtd
@@ -0,0 +1,1585 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 04/01/2011 23:04:41
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "Docsum-3-3"
+================================================= -->
+
+<!--
+ ============================================
+ ::DATATOOL:: Generated from "docsum_3.3.xsd"
+ ::DATATOOL:: by application DATATOOL version 2.1.0
+ ::DATATOOL:: on 03/03/2011 12:34:38
+ ============================================
+ edited with XMLSPY v5 rel. 4 U (http://www.xmlspy.com) by Michael Kholodov (National Library of Medicine) 
+ edited with XMLSpy v2005 rel. 3 U (http://www.altova.com) by Michael Feolo (NCBI/NLM/NIH) 
+-->
+
+
+<!ELEMENT Assay (
+        Assay_attlist, 
+        Assay_method, 
+        Assay_taxonomy, 
+        Assay_strains?, 
+        Assay_comment?, 
+        Assay_citation?)>
+
+<!ELEMENT Assay_attlist (
+        Assay_attlist_handle?, 
+        Assay_attlist_batch?, 
+        Assay_attlist_batchId?, 
+        Assay_attlist_batchType?, 
+        Assay_attlist_molType?, 
+        Assay_attlist_sampleSize?, 
+        Assay_attlist_population?, 
+        Assay_attlist_linkoutUrl?)>
+
+<!ELEMENT Assay_attlist_handle (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batch (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batchId (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_batchType %ENUM;>
+<!ATTLIST Assay_attlist_batchType value (
+        snpassay |
+        validation |
+        doublehit
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_molType %ENUM;>
+<!ATTLIST Assay_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_population (#PCDATA)>
+
+<!ELEMENT Assay_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Assay_method (
+        Assay_method_eMethod?)>
+
+<!ELEMENT Assay_method_eMethod (
+        Assay_method_eMethod_attlist, 
+        Assay_method_eMethod_exception)>
+
+<!ELEMENT Assay_method_eMethod_attlist (
+        Assay_method_eMethod_attlist_name?, 
+        Assay_method_eMethod_attlist_id?)>
+
+<!--Submitters method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_name (#PCDATA)>
+
+<!--dbSNP method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_id (#PCDATA)>
+
+<!--
+description of deviation from/addition to
+										given method 
+-->
+<!ELEMENT Assay_method_eMethod_exception (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy (
+        Assay_taxonomy_attlist, 
+        Assay_taxonomy_taxonomy)>
+
+<!ELEMENT Assay_taxonomy_attlist (
+        Assay_taxonomy_attlist_id, 
+        Assay_taxonomy_attlist_organism?)>
+
+<!--
+NCBI taxonomy ID for
+									variation
+-->
+<!ELEMENT Assay_taxonomy_attlist_id (%INTEGER;)>
+
+<!ELEMENT Assay_taxonomy_attlist_organism (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy_taxonomy EMPTY>
+
+<!ELEMENT Assay_strains (Assay_strains_E*)>
+
+
+<!ELEMENT Assay_strains_E (#PCDATA)>
+
+<!ELEMENT Assay_comment (#PCDATA)>
+
+<!ELEMENT Assay_citation (Assay_citation_E*)>
+
+
+<!ELEMENT Assay_citation_E (#PCDATA)>
+
+<!--
+A collection of genome sequence records (curated gene regions (NG's),
+				contigs (NWNT's) and chromosomes (NC/AC's) produced by a genome sequence project.
+				Structure is populated from ContigInfo tables.
+-->
+<!ELEMENT Assembly (
+        Assembly_attlist, 
+        Assembly_component?, 
+        Assembly_snpStat)>
+
+<!ELEMENT Assembly_attlist (
+        Assembly_attlist_dbSnpBuild, 
+        Assembly_attlist_genomeBuild, 
+        Assembly_attlist_groupLabel?, 
+        Assembly_attlist_assemblySource?, 
+        Assembly_attlist_current?, 
+        Assembly_attlist_reference?)>
+
+<!--
+dbSNP build number defining the rsid set aligned to this
+						assembly
+-->
+<!ELEMENT Assembly_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--
+assembly build number with possible 'subbuild' version
+						numbers to reflect updates in gene annotation (human e.g. 34_3, 35_1,
+						36_1)
+-->
+<!ELEMENT Assembly_attlist_genomeBuild (#PCDATA)>
+
+<!--
+High-level classification of the assembly to distinguish
+						reference projects from alternate solutions. GroupLabel field from
+						organism/build-specific ContigInfo tables. "reference" is occasionally used
+						as the preferred assembly; standards will converge as additional organism
+						genome projects are finished. Note that some organism assembly names include
+						extended characters like '~' and '/' that may be incompatible with OS
+						filename conventions.
+-->
+<!ELEMENT Assembly_attlist_groupLabel (#PCDATA)>
+
+<!--
+Name of the group(s) or organization(s) that generated the
+						assembly
+-->
+<!ELEMENT Assembly_attlist_assemblySource (#PCDATA)>
+
+<!--Marks the current genomic assembly -->
+<!ELEMENT Assembly_attlist_current EMPTY>
+<!ATTLIST Assembly_attlist_current value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_attlist_reference EMPTY>
+<!ATTLIST Assembly_attlist_reference value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_component (Component*)>
+
+<!ELEMENT Assembly_snpStat (
+        Assembly_snpStat_attlist, 
+        Assembly_snpStat_snpStat)>
+
+<!ELEMENT Assembly_snpStat_attlist (
+        Assembly_snpStat_attlist_mapWeight, 
+        Assembly_snpStat_attlist_chromCount?, 
+        Assembly_snpStat_attlist_placedContigCount?, 
+        Assembly_snpStat_attlist_unplacedContigCount?, 
+        Assembly_snpStat_attlist_seqlocCount?, 
+        Assembly_snpStat_attlist_hapCount?)>
+<!--
+summary measure of placement precision in the
+									assembly
+-->
+<!ELEMENT Assembly_snpStat_attlist_mapWeight %ENUM;>
+<!ATTLIST Assembly_snpStat_attlist_mapWeight value (
+        unmapped |
+        unique-in-contig |
+        two-hits-in-contig |
+        less-10-hits |
+        multiple-hits
+        ) #REQUIRED >
+
+
+<!--
+number of distinct chromosomes in the
+									mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_chromCount (%INTEGER;)>
+
+<!--
+number of distinct contigs [ gi |
+									accession[.version] ] in the mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_placedContigCount (%INTEGER;)>
+
+<!--
+number of sequence postions to a contig with
+									unknown chromosomal assignment
+-->
+<!ELEMENT Assembly_snpStat_attlist_unplacedContigCount (%INTEGER;)>
+
+<!--
+total number of sequence positions in the
+									mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_seqlocCount (%INTEGER;)>
+
+<!--
+Number of hits to alternative genomic haplotypes
+									(e.g. HLA DR region, KIR, or pseudo-autosomal regions like PAR)
+									within the assembly mapset. Note that positions on haplotypes
+									defined in other assemblies (a different assembly_group_label
+									value) will not be counted in this value.
+-->
+<!ELEMENT Assembly_snpStat_attlist_hapCount (%INTEGER;)>
+
+<!ELEMENT Assembly_snpStat_snpStat EMPTY>
+
+<!--
+URL value from dbSNP_main.BaseURL links table. attributes provide
+				context information and URL id that is referenced within individual refSNP
+				objects.
+-->
+<!ELEMENT BaseURL (
+        BaseURL_attlist, 
+        BaseURL_baseURL)>
+
+<!ELEMENT BaseURL_attlist (
+        BaseURL_attlist_urlId?, 
+        BaseURL_attlist_resourceName?, 
+        BaseURL_attlist_resourceId?)>
+
+<!--
+Resource identifier from
+								dbSNP_main.baseURL.
+-->
+<!ELEMENT BaseURL_attlist_urlId (%INTEGER;)>
+
+<!--Name of linked resource -->
+<!ELEMENT BaseURL_attlist_resourceName (#PCDATA)>
+
+<!--
+identifier expected by resource for
+								URL
+-->
+<!ELEMENT BaseURL_attlist_resourceId (#PCDATA)>
+
+<!--
+URL value from dbSNP_main.BaseURL links table. attributes provide
+				context information and URL id that is referenced within individual refSNP
+				objects.
+-->
+<!ELEMENT BaseURL_baseURL (#PCDATA)>
+
+
+<!ELEMENT Component (
+        Component_attlist, 
+        Component_mapLoc)>
+
+<!ELEMENT Component_attlist (
+        Component_attlist_componentType?, 
+        Component_attlist_ctgId?, 
+        Component_attlist_accession?, 
+        Component_attlist_name?, 
+        Component_attlist_chromosome?, 
+        Component_attlist_start?, 
+        Component_attlist_end?, 
+        Component_attlist_orientation?, 
+        Component_attlist_gi?, 
+        Component_attlist_groupTerm?, 
+        Component_attlist_contigLabel?)>
+<!--
+type of component: chromosome, contig, gene_region,
+						etc.
+-->
+<!ELEMENT Component_attlist_componentType %ENUM;>
+<!ATTLIST Component_attlist_componentType value (
+        contig |
+        mrna
+        ) #REQUIRED >
+
+
+<!--
+dbSNP contig_id used to join on contig hit / mapset data to
+						these assembly properties
+-->
+<!ELEMENT Component_attlist_ctgId (%INTEGER;)>
+
+<!--
+Accession[.version] for the sequence
+						component
+-->
+<!ELEMENT Component_attlist_accession (#PCDATA)>
+
+<!--
+contig name defined as either a submitter local id, element
+						of a whole genome assembly set, or internal NCBI local
+						id
+-->
+<!ELEMENT Component_attlist_name (#PCDATA)>
+
+<!--
+Organism appropriate chromosome tag, 'Un' reserved for
+						default case of unplaced components
+-->
+<!ELEMENT Component_attlist_chromosome (#PCDATA)>
+
+<!--
+component starting position on the chromosome (base 0
+						inclusive)
+-->
+<!ELEMENT Component_attlist_start (%INTEGER;)>
+
+<!--
+component ending position on the chromosome (base 0
+						inclusive)
+-->
+<!ELEMENT Component_attlist_end (%INTEGER;)>
+<!--
+orientation of this component to chromosome, forward (fwd) =
+						0, reverse (rev) = 1, unknown = NULL in
+						ContigInfo.orient.
+-->
+<!ELEMENT Component_attlist_orientation %ENUM;>
+<!ATTLIST Component_attlist_orientation value (
+        fwd |
+        rev |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+NCBI gi for component sequence (equivalent to
+						accession.version) for nucleotide sequence.
+-->
+<!ELEMENT Component_attlist_gi (#PCDATA)>
+
+<!--
+Identifier label for the genome assembly that defines the
+						contigs in this mapset and their placement within the organism genome.
+-->
+<!ELEMENT Component_attlist_groupTerm (#PCDATA)>
+
+<!--Display label for component -->
+<!ELEMENT Component_attlist_contigLabel (#PCDATA)>
+
+<!ELEMENT Component_mapLoc (MapLoc*)>
+
+<!--Set of dbSNP refSNP docsums, version 3.2 -->
+<!ELEMENT ExchangeSet (
+        ExchangeSet_attlist, 
+        ExchangeSet_sourceDatabase, 
+        ExchangeSet_rs?, 
+        ExchangeSet_assay?, 
+        ExchangeSet_query?, 
+        ExchangeSet_summary, 
+        ExchangeSet_baseURL)>
+
+<!ELEMENT ExchangeSet_attlist (
+        ExchangeSet_attlist_setType?, 
+        ExchangeSet_attlist_setDepth?, 
+        ExchangeSet_attlist_specVersion?, 
+        ExchangeSet_attlist_dbSnpBuild?, 
+        ExchangeSet_attlist_generated?)>
+
+<!--
+set-type: full dump; from query; single
+						refSNP
+-->
+<!ELEMENT ExchangeSet_attlist_setType (#PCDATA)>
+
+<!--
+content depth: brief XML (only refSNP properties and summary
+						subSNP element content); full XML (full refSNP, full subSNP content; all
+						flanking sequences) 
+-->
+<!ELEMENT ExchangeSet_attlist_setDepth (#PCDATA)>
+
+<!--
+version number of docsum.asn/docsum.dtd
+						specification
+-->
+<!ELEMENT ExchangeSet_attlist_specVersion (#PCDATA)>
+
+<!--build number of database for this export -->
+<!ELEMENT ExchangeSet_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--Generated date -->
+<!ELEMENT ExchangeSet_attlist_generated (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase (
+        ExchangeSet_sourceDatabase_attlist, 
+        ExchangeSet_sourceDatabase_sourceDatabase)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_attlist (
+        ExchangeSet_sourceDatabase_attlist_taxId, 
+        ExchangeSet_sourceDatabase_attlist_organism, 
+        ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr?, 
+        ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr?)>
+
+<!--
+NCBI taxonomy ID for
+									variation
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_taxId (%INTEGER;)>
+
+<!--
+common name for species used as part of database
+									name.
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_organism (#PCDATA)>
+
+<!--organism abbreviation used in dbSNP. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr (#PCDATA)>
+
+<!--
+organism abbreviation used within NCBI genome
+									pipeline data dumps.
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_sourceDatabase EMPTY>
+
+<!ELEMENT ExchangeSet_rs (Rs*)>
+
+<!ELEMENT ExchangeSet_assay (Assay)>
+
+<!ELEMENT ExchangeSet_query (
+        ExchangeSet_query_attlist, 
+        ExchangeSet_query_query)>
+
+<!ELEMENT ExchangeSet_query_attlist (
+        ExchangeSet_query_attlist_date?, 
+        ExchangeSet_query_attlist_string?)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT ExchangeSet_query_attlist_date (#PCDATA)>
+
+<!--
+Query terms or search
+									constraints
+-->
+<!ELEMENT ExchangeSet_query_attlist_string (#PCDATA)>
+
+<!ELEMENT ExchangeSet_query_query EMPTY>
+
+<!ELEMENT ExchangeSet_summary (
+        ExchangeSet_summary_attlist, 
+        ExchangeSet_summary_summary)>
+
+<!ELEMENT ExchangeSet_summary_attlist (
+        ExchangeSet_summary_attlist_numRsIds?, 
+        ExchangeSet_summary_attlist_totalSeqLength?, 
+        ExchangeSet_summary_attlist_numContigHits?, 
+        ExchangeSet_summary_attlist_numGeneHits?, 
+        ExchangeSet_summary_attlist_numGiHits?, 
+        ExchangeSet_summary_attlist_num3dStructs?, 
+        ExchangeSet_summary_attlist_numAlleleFreqs?, 
+        ExchangeSet_summary_attlist_numStsHits?, 
+        ExchangeSet_summary_attlist_numUnigeneCids?)>
+
+<!--Total number of refsnp-ids in this exchange set -->
+<!ELEMENT ExchangeSet_summary_attlist_numRsIds (%INTEGER;)>
+
+<!--
+Total length of exemplar flanking
+									sequences
+-->
+<!ELEMENT ExchangeSet_summary_attlist_totalSeqLength (%INTEGER;)>
+
+<!--
+Total number of contig locations from
+									SNPContigLoc
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numContigHits (%INTEGER;)>
+
+<!--
+Total number of locus ids from
+									SNPContigLocusId
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numGeneHits (%INTEGER;)>
+
+<!--
+Total number of gi hits from
+									MapLink
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numGiHits (%INTEGER;)>
+
+<!--
+Total number of 3D structures from
+									SNP3D
+-->
+<!ELEMENT ExchangeSet_summary_attlist_num3dStructs (%INTEGER;)>
+
+<!--
+Total number of allele frequences from
+									SubPopAllele
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numAlleleFreqs (%INTEGER;)>
+
+<!--
+Total number of STS hits from
+									SnpInSts
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numStsHits (%INTEGER;)>
+
+<!--
+Total number of unigene cluster ids from
+									UnigeneSnp
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numUnigeneCids (%INTEGER;)>
+
+<!ELEMENT ExchangeSet_summary_summary EMPTY>
+
+<!ELEMENT ExchangeSet_baseURL (BaseURL*)>
+
+<!--
+functional relationship of SNP (and possibly alleles) to genes at
+				contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx
+				tables.
+-->
+<!ELEMENT FxnSet (
+        FxnSet_attlist, 
+        FxnSet_fxnSet)>
+
+<!ELEMENT FxnSet_attlist (
+        FxnSet_attlist_geneId?, 
+        FxnSet_attlist_symbol?, 
+        FxnSet_attlist_mrnaAcc?, 
+        FxnSet_attlist_mrnaVer?, 
+        FxnSet_attlist_protAcc?, 
+        FxnSet_attlist_protVer?, 
+        FxnSet_attlist_fxnClass?, 
+        FxnSet_attlist_readingFrame?, 
+        FxnSet_attlist_allele?, 
+        FxnSet_attlist_residue?, 
+        FxnSet_attlist_aaPosition?, 
+        FxnSet_attlist_mrnaPosition?)>
+
+<!--gene-id of gene as aligned to contig -->
+<!ELEMENT FxnSet_attlist_geneId (%INTEGER;)>
+
+<!--
+symbol (official if present in Entrez Gene) of
+						gene
+-->
+<!ELEMENT FxnSet_attlist_symbol (#PCDATA)>
+
+<!--mRNA accession if variation in transcript -->
+<!ELEMENT FxnSet_attlist_mrnaAcc (#PCDATA)>
+
+<!--
+mRNA sequence version if variation is in
+						transcripot
+-->
+<!ELEMENT FxnSet_attlist_mrnaVer (%INTEGER;)>
+
+<!--protein accession if variation in protein -->
+<!ELEMENT FxnSet_attlist_protAcc (#PCDATA)>
+
+<!--
+protein version if variation is in
+						protein
+-->
+<!ELEMENT FxnSet_attlist_protVer (%INTEGER;)>
+<!--
+variation in region of gene, but not in
+										transcript - deprecated
+-->
+<!ELEMENT FxnSet_attlist_fxnClass %ENUM;>
+<!ATTLIST FxnSet_attlist_fxnClass value (
+        locus-region |
+        coding-unknown |
+        synonymous-codon |
+        non-synonymous-codon |
+        mrna-utr |
+        intron-variant |
+        splice-region-variant |
+        reference |
+        coding-exception |
+        coding-sequence-variant |
+        nc-transcript-variant |
+        downstream-variant-500B |
+        upstream-variant-2KB |
+        stop-gained |
+        missense |
+        frameshift-variant |
+        utr-variant-3-prime |
+        upstream-variant-5KB |
+        splice-acceptor-variant |
+        splice-donor-variant |
+        cds-indel |
+        downstream-variant-5KB |
+        complex-change-in-transcript |
+        stop-lost |
+        incomplete-terminal-codon-variant |
+        nmd-transcript-variant |
+        mature-miRNA-variant
+        ) #REQUIRED >
+
+
+<!ELEMENT FxnSet_attlist_readingFrame (%INTEGER;)>
+
+<!--
+variation allele: * suffix indicates allele of contig at this
+						location
+-->
+<!ELEMENT FxnSet_attlist_allele (#PCDATA)>
+
+<!--translated amino acid residue for allele -->
+<!ELEMENT FxnSet_attlist_residue (#PCDATA)>
+
+<!--
+position of the variant residue in peptide
+						sequence
+-->
+<!ELEMENT FxnSet_attlist_aaPosition (%INTEGER;)>
+
+<!ELEMENT FxnSet_attlist_mrnaPosition (%INTEGER;)>
+
+<!--
+functional relationship of SNP (and possibly alleles) to genes at
+				contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx
+				tables.
+-->
+<!ELEMENT FxnSet_fxnSet EMPTY>
+
+<!--
+Position of a single hit of a variation on a
+				contig
+-->
+<!ELEMENT MapLoc (
+        MapLoc_attlist, 
+        MapLoc_fxnSet?)>
+
+<!ELEMENT MapLoc_attlist (
+        MapLoc_attlist_asnFrom, 
+        MapLoc_attlist_asnTo, 
+        MapLoc_attlist_locType, 
+        MapLoc_attlist_alnQuality?, 
+        MapLoc_attlist_orient?, 
+        MapLoc_attlist_physMapInt?, 
+        MapLoc_attlist_leftFlankNeighborPos?, 
+        MapLoc_attlist_rightFlankNeighborPos?, 
+        MapLoc_attlist_leftContigNeighborPos?, 
+        MapLoc_attlist_rightContigNeighborPos?, 
+        MapLoc_attlist_numberOfMismatches?, 
+        MapLoc_attlist_numberOfDeletions?, 
+        MapLoc_attlist_numberOfInsertions?)>
+
+<!--
+beginning of variation as feature on
+						contig
+-->
+<!ELEMENT MapLoc_attlist_asnFrom (%INTEGER;)>
+
+<!--
+end position of variation as feature on
+						contig
+-->
+<!ELEMENT MapLoc_attlist_asnTo (%INTEGER;)>
+<!--
+defines the seq-loc symbol if asn_from !=
+						asn_to
+-->
+<!ELEMENT MapLoc_attlist_locType %ENUM;>
+<!ATTLIST MapLoc_attlist_locType value (
+        insertion |
+        exact |
+        deletion |
+        range-ins |
+        range-exact |
+        range-del
+        ) #REQUIRED >
+
+
+<!--alignment qualiity -->
+<!ELEMENT MapLoc_attlist_alnQuality (%REAL;)>
+<!--
+orientation of refSNP sequence to contig
+						sequence
+-->
+<!ELEMENT MapLoc_attlist_orient %ENUM;>
+<!ATTLIST MapLoc_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--
+chromosome position as integer for
+						sorting
+-->
+<!ELEMENT MapLoc_attlist_physMapInt (%INTEGER;)>
+
+<!--
+nearest aligned position in 5' flanking sequence of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_leftFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' flanking sequence of snp -->
+<!ELEMENT MapLoc_attlist_rightFlankNeighborPos (%INTEGER;)>
+
+<!--
+nearest aligned position in 5' contig alignment of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_leftContigNeighborPos (%INTEGER;)>
+
+<!--
+nearest aligned position in 3' contig alignment of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_rightContigNeighborPos (%INTEGER;)>
+
+<!--
+number of Mismatched positions in this
+						alignment
+-->
+<!ELEMENT MapLoc_attlist_numberOfMismatches (%INTEGER;)>
+
+<!--number of deletions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfDeletions (%INTEGER;)>
+
+<!--number of insetions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfInsertions (%INTEGER;)>
+
+<!ELEMENT MapLoc_fxnSet (FxnSet*)>
+
+
+<!ELEMENT PrimarySequence (
+        PrimarySequence_attlist, 
+        PrimarySequence_mapLoc)>
+
+<!ELEMENT PrimarySequence_attlist (
+        PrimarySequence_attlist_dbSnpBuild, 
+        PrimarySequence_attlist_gi, 
+        PrimarySequence_attlist_source?, 
+        PrimarySequence_attlist_accession?)>
+
+<!ELEMENT PrimarySequence_attlist_dbSnpBuild (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_gi (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_source %ENUM;>
+<!ATTLIST PrimarySequence_attlist_source value (
+        submitter |
+        blastmb |
+        xm |
+        remap |
+        hgvs
+        ) #REQUIRED >
+
+
+<!ELEMENT PrimarySequence_attlist_accession (#PCDATA)>
+
+<!ELEMENT PrimarySequence_mapLoc (MapLoc*)>
+
+<!--
+defines the docsum structure for refSNP clusters, where a refSNP
+				cluster (rs) is a grouping of individual dbSNP submissions that all refer to the
+				same variation. The refsnp provides a single unified record for annotation of NCBI
+				resources such as reference genome sequence.
+-->
+<!ELEMENT Rs (
+        Rs_attlist, 
+        Rs_het?, 
+        Rs_validation, 
+        Rs_create, 
+        Rs_update?, 
+        Rs_sequence, 
+        Rs_ss, 
+        Rs_assembly?, 
+        Rs_primarySequence?, 
+        Rs_rsStruct?, 
+        Rs_rsLinkout?, 
+        Rs_mergeHistory?, 
+        Rs_hgvs?, 
+        Rs_alleleOrigin?, 
+        Rs_phenotype?, 
+        Rs_bioSource?, 
+        Rs_frequency?)>
+
+<!ELEMENT Rs_attlist (
+        Rs_attlist_rsId, 
+        Rs_attlist_snpClass, 
+        Rs_attlist_snpType, 
+        Rs_attlist_molType, 
+        Rs_attlist_validProbMin?, 
+        Rs_attlist_validProbMax?, 
+        Rs_attlist_genotype?, 
+        Rs_attlist_bitField?, 
+        Rs_attlist_taxId?)>
+
+<!--refSNP (rs) number -->
+<!ELEMENT Rs_attlist_rsId (%INTEGER;)>
+
+<!ELEMENT Rs_attlist_snpClass %ENUM;>
+<!ATTLIST Rs_attlist_snpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_snpType %ENUM;>
+<!ATTLIST Rs_attlist_snpType value (
+        notwithdrawn |
+        artifact |
+        gene-duplication |
+        duplicate-submission |
+        notspecified |
+        ambiguous-location |
+        low-map-quality
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_molType %ENUM;>
+<!ATTLIST Rs_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+minimum reported success rate of all submissions in
+						cluster
+-->
+<!ELEMENT Rs_attlist_validProbMin (%INTEGER;)>
+
+<!--
+maximum reported success rate of all submissions in
+						cluster
+-->
+<!ELEMENT Rs_attlist_validProbMax (%INTEGER;)>
+
+<!--
+at least one genotype reported for this
+						refSNP
+-->
+<!ELEMENT Rs_attlist_genotype EMPTY>
+<!ATTLIST Rs_attlist_genotype value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_bitField (#PCDATA)>
+
+<!ELEMENT Rs_attlist_taxId (%INTEGER;)>
+
+<!ELEMENT Rs_het (
+        Rs_het_attlist, 
+        Rs_het_het)>
+
+<!ELEMENT Rs_het_attlist (
+        Rs_het_attlist_type, 
+        Rs_het_attlist_value, 
+        Rs_het_attlist_stdError?)>
+<!--
+Est=Estimated average het from allele
+									frequencies, Obs=Observed from genotype data
+-->
+<!ELEMENT Rs_het_attlist_type %ENUM;>
+<!ATTLIST Rs_het_attlist_type value (
+        est |
+        obs
+        ) #REQUIRED >
+
+
+<!--Heterozygosity -->
+<!ELEMENT Rs_het_attlist_value (%REAL;)>
+
+<!--
+Standard error of Het
+									estimate
+-->
+<!ELEMENT Rs_het_attlist_stdError (%REAL;)>
+
+<!ELEMENT Rs_het_het EMPTY>
+
+<!ELEMENT Rs_validation (
+        Rs_validation_attlist, 
+        Rs_validation_otherPopBatchId?, 
+        Rs_validation_twoHit2AlleleBatchId?, 
+        Rs_validation_frequencyClass?, 
+        Rs_validation_hapMapPhase?, 
+        Rs_validation_tGPPhase?, 
+        Rs_validation_suspectEvidence?)>
+
+<!ELEMENT Rs_validation_attlist (
+        Rs_validation_attlist_byCluster?, 
+        Rs_validation_attlist_byFrequency?, 
+        Rs_validation_attlist_byOtherPop?, 
+        Rs_validation_attlist_by2Hit2Allele?, 
+        Rs_validation_attlist_byHapMap?, 
+        Rs_validation_attlist_by1000G?, 
+        Rs_validation_attlist_suspect?)>
+
+<!--
+at least one subsnp in cluster has frequency data
+									submitted
+-->
+<!ELEMENT Rs_validation_attlist_byCluster EMPTY>
+<!ATTLIST Rs_validation_attlist_byCluster value ( true | false ) #REQUIRED >
+
+
+<!--Validated by allele frequency -->
+<!ELEMENT Rs_validation_attlist_byFrequency EMPTY>
+<!ATTLIST Rs_validation_attlist_byFrequency value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_validation_attlist_byOtherPop EMPTY>
+<!ATTLIST Rs_validation_attlist_byOtherPop value ( true | false ) #REQUIRED >
+
+
+<!--
+cluster has 2+ submissions, with 1+ submissions
+									assayed with a non-computational method
+-->
+<!ELEMENT Rs_validation_attlist_by2Hit2Allele EMPTY>
+<!ATTLIST Rs_validation_attlist_by2Hit2Allele value ( true | false ) #REQUIRED >
+
+
+<!--Validated by HapMap Project  -->
+<!ELEMENT Rs_validation_attlist_byHapMap EMPTY>
+<!ATTLIST Rs_validation_attlist_byHapMap value ( true | false ) #REQUIRED >
+
+
+<!--Validated by 1000 Genomes Project -->
+<!ELEMENT Rs_validation_attlist_by1000G EMPTY>
+<!ATTLIST Rs_validation_attlist_by1000G value ( true | false ) #REQUIRED >
+
+
+<!--Suspected to be false SNP -->
+<!ELEMENT Rs_validation_attlist_suspect EMPTY>
+<!ATTLIST Rs_validation_attlist_suspect value ( true | false ) #REQUIRED >
+
+
+<!--
+dbSNP batch-id's for other pop snp validation
+										data.
+-->
+<!ELEMENT Rs_validation_otherPopBatchId (Rs_validation_otherPopBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_otherPopBatchId_E (%INTEGER;)>
+
+<!--
+dbSNP batch-id's for double-hit snp
+										validation data. Use batch-id to get methods, etc.
+-->
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId (Rs_validation_twoHit2AlleleBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId_E (%INTEGER;)>
+
+<!--
+Frequency validation class (1) low frequency
+										variation that is cited in journal and other reputable
+										sources (2) greater than 5 percent minor allele freq in each
+										and all populations (4) greater than 5 percent minor allele
+										freq in 1+ populations (8) if the variant has 2+ minor
+										allele count based on freq or genotype data (16) less than 1
+										percent minor allele freq in each and all populations (32)
+										less than 1 percent minor freq in 1+ populations
+-->
+<!ELEMENT Rs_validation_frequencyClass (Rs_validation_frequencyClass_E*)>
+
+
+<!ELEMENT Rs_validation_frequencyClass_E (%INTEGER;)>
+
+<!--
+alidated by HapMap Project phase1-genotyped
+										(1), Phase 1 genotyped; filtered, non-redundant
+										phase2-genotyped (2), Phase 2 genotyped; filtered,
+										non-redundant phase3-genotyped (4) Phase 3 genotyped;
+										filtered, non-redundant 
+-->
+<!ELEMENT Rs_validation_hapMapPhase (Rs_validation_hapMapPhase_E*)>
+
+
+<!ELEMENT Rs_validation_hapMapPhase_E (%INTEGER;)>
+
+<!--
+Validated by 1000 Genomes Project (TGP) pilot
+										1 (1), pilot 2 (2), pilot 3 (4) 
+-->
+<!ELEMENT Rs_validation_tGPPhase (Rs_validation_tGPPhase_E*)>
+
+
+<!ELEMENT Rs_validation_tGPPhase_E (%INTEGER;)>
+
+<!--
+Suspected to be false SNP evidence Single
+										Nucleotide Difference - paralogous genes (1), Genotype or
+										base calling errors (2), Submission evidence or errors (4),
+										Others (8) 
+-->
+<!ELEMENT Rs_validation_suspectEvidence (Rs_validation_suspectEvidence_E*)>
+
+
+<!ELEMENT Rs_validation_suspectEvidence_E (#PCDATA)>
+<!--
+date the refsnp cluster was
+							instantiated
+date the refsnp cluster was
+							instantiated
+-->
+<!ELEMENT Rs_create (
+        Rs_create_attlist, 
+        Rs_create_create)>
+
+<!ELEMENT Rs_create_attlist (
+        Rs_create_attlist_build?, 
+        Rs_create_attlist_date?)>
+
+<!--
+build number when the cluster was
+									created
+-->
+<!ELEMENT Rs_create_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_create_attlist_date (#PCDATA)>
+
+<!--
+date the refsnp cluster was
+							instantiated
+-->
+<!ELEMENT Rs_create_create EMPTY>
+<!--
+most recent date the cluster was updated (member added or
+							deleted)
+most recent date the cluster was updated (member added or
+							deleted)
+-->
+<!ELEMENT Rs_update (
+        Rs_update_attlist, 
+        Rs_update_update)>
+
+<!ELEMENT Rs_update_attlist (
+        Rs_update_attlist_build?, 
+        Rs_update_attlist_date?)>
+
+<!--
+build number when the cluster was
+									updated
+-->
+<!ELEMENT Rs_update_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_update_attlist_date (#PCDATA)>
+
+<!--
+most recent date the cluster was updated (member added or
+							deleted)
+-->
+<!ELEMENT Rs_update_update EMPTY>
+
+<!ELEMENT Rs_sequence (
+        Rs_sequence_attlist, 
+        Rs_sequence_seq5?, 
+        Rs_sequence_observed, 
+        Rs_sequence_seq3?)>
+
+<!ELEMENT Rs_sequence_attlist (
+        Rs_sequence_attlist_exemplarSs, 
+        Rs_sequence_attlist_ancestralAllele?)>
+
+<!--
+dbSNP ss# selected as source of refSNP flanking
+									sequence, ss# part of ss-list below 
+-->
+<!ELEMENT Rs_sequence_attlist_exemplarSs (%INTEGER;)>
+
+<!ELEMENT Rs_sequence_attlist_ancestralAllele (#PCDATA)>
+
+<!--
+5' sequence that flanks the
+										variation
+-->
+<!ELEMENT Rs_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in
+										ss-list members, correcting for reverse complementation of
+										members reported in reverse orientation
+-->
+<!ELEMENT Rs_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the
+										variation
+-->
+<!ELEMENT Rs_sequence_seq3 (#PCDATA)>
+
+<!ELEMENT Rs_ss (Ss*)>
+
+<!ELEMENT Rs_assembly (Assembly*)>
+
+<!ELEMENT Rs_primarySequence (PrimarySequence*)>
+
+<!ELEMENT Rs_rsStruct (RsStruct*)>
+
+<!ELEMENT Rs_rsLinkout (RsLinkout*)>
+
+<!ELEMENT Rs_mergeHistory (Rs_mergeHistory_E*)>
+
+
+<!ELEMENT Rs_mergeHistory_E (
+        Rs_mergeHistory_E_attlist, 
+        Rs_mergeHistory_E_mergeHistory)>
+
+<!ELEMENT Rs_mergeHistory_E_attlist (
+        Rs_mergeHistory_E_attlist_rsId, 
+        Rs_mergeHistory_E_attlist_buildId?, 
+        Rs_mergeHistory_E_attlist_orientFlip?)>
+
+<!--
+previously issued rs id whose member assays have
+									now been merged
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_rsId (%INTEGER;)>
+
+<!--
+build id when rs id was merged into parent
+									rs
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_buildId (%INTEGER;)>
+
+<!--
+TRUE if strand of rs id is reverse to parent
+									object's current strand
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_orientFlip EMPTY>
+<!ATTLIST Rs_mergeHistory_E_attlist_orientFlip value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_mergeHistory_E_mergeHistory EMPTY>
+
+<!-- HGVS name list  -->
+<!ELEMENT Rs_hgvs (Rs_hgvs_E*)>
+
+
+<!ELEMENT Rs_hgvs_E (#PCDATA)>
+<!--
+							origin of this allele, if known
+							note that these are powers-of-two, and represent bits; thus, we can
+							represent more than one state simultaneously through a bitwise OR
+							unknown         (0),
+							germline        (1),
+							somatic         (2),
+							inherited       (4),
+							paternal        (8),
+							maternal        (16),
+							de-novo         (32),
+							biparental      (64),
+							uniparental     (128),
+							not-tested      (256),
+							tested-inconclusive (512),
+							origin of this allele, if known
+							note that these are powers-of-two, and represent bits; thus, we can
+							represent more than one state simultaneously through a bitwise OR
+							unknown         (0),
+							germline        (1),
+							somatic         (2),
+							inherited       (4),
+							paternal        (8),
+							maternal        (16),
+							de-novo         (32),
+							biparental      (64),
+							uniparental     (128),
+							not-tested      (256),
+							tested-inconclusive (512),
+-->
+<!ELEMENT Rs_alleleOrigin (Rs_alleleOrigin_E*)>
+
+
+<!ELEMENT Rs_alleleOrigin_E (
+        Rs_alleleOrigin_E_attlist, 
+        Rs_alleleOrigin_E_alleleOrigin)>
+
+<!ELEMENT Rs_alleleOrigin_E_attlist (
+        Rs_alleleOrigin_E_attlist_allele?)>
+
+<!ELEMENT Rs_alleleOrigin_E_attlist_allele (#PCDATA)>
+
+<!--
+							origin of this allele, if known
+							note that these are powers-of-two, and represent bits; thus, we can
+							represent more than one state simultaneously through a bitwise OR
+							unknown         (0),
+							germline        (1),
+							somatic         (2),
+							inherited       (4),
+							paternal        (8),
+							maternal        (16),
+							de-novo         (32),
+							biparental      (64),
+							uniparental     (128),
+							not-tested      (256),
+							tested-inconclusive (512),
+-->
+<!ELEMENT Rs_alleleOrigin_E_alleleOrigin (%INTEGER;)>
+
+<!ELEMENT Rs_phenotype (Rs_phenotype_E*)>
+
+
+<!ELEMENT Rs_phenotype_E (
+        Rs_phenotype_E_clinicalSignificance?)>
+
+<!--
+										unknown                 (0),
+										untested                (1),
+										non-pathogenic          (2),
+										probable-non-pathogenic (3),
+										probable-pathogenic     (4),
+										pathogenic              (5),
+										drug response           (6),
+										other                   (255)
+-->
+<!ELEMENT Rs_phenotype_E_clinicalSignificance (Rs_phenotype_E_clinicalSignificance_E*)>
+
+
+<!ELEMENT Rs_phenotype_E_clinicalSignificance_E (#PCDATA)>
+
+<!ELEMENT Rs_bioSource (Rs_bioSource_E*)>
+
+
+<!ELEMENT Rs_bioSource_E (
+        Rs_bioSource_E_genome?, 
+        Rs_bioSource_E_origin?)>
+
+<!--
+										unknown (0) ,
+										genomic (1) ,
+										chloroplast (2) ,
+										chromoplast (3) ,
+										kinetoplast (4) ,
+										mitochondrion (5) ,
+										plastid (6) ,
+										macronuclear (7) ,
+										extrachrom (8) ,
+										plasmid (9) ,
+										transposon (10) ,
+										insertion-seq (11) ,
+										cyanelle (12) ,
+										proviral (13) ,
+										virion (14) ,
+										nucleomorph (15) ,
+										apicoplast (16) ,
+										leucoplast (17) ,
+										proplastid (18) ,
+										endogenous-virus (19) ,
+										hydrogenosome (20) ,
+										chromosome (21) ,
+										chromatophore (22)
+-->
+<!ELEMENT Rs_bioSource_E_genome (Rs_bioSource_E_genome_E*)>
+
+
+<!ELEMENT Rs_bioSource_E_genome_E (#PCDATA)>
+
+<!--
+										unknown (0) ,
+										natural (1) ,                    normal biological entity
+										natmut (2) ,                    naturally occurring mutant
+										mut (3) ,                        artificially mutagenized
+										artificial (4) ,                 artificially engineered
+										synthetic (5) ,                 purely synthetic
+										other (255)
+-->
+<!ELEMENT Rs_bioSource_E_origin (Rs_bioSource_E_origin_E*)>
+
+
+<!ELEMENT Rs_bioSource_E_origin_E (#PCDATA)>
+
+<!ELEMENT Rs_frequency (Rs_frequency_E*)>
+
+
+<!ELEMENT Rs_frequency_E (
+        Rs_frequency_E_attlist, 
+        Rs_frequency_E_frequency)>
+
+<!ELEMENT Rs_frequency_E_attlist (
+        Rs_frequency_E_attlist_freq?, 
+        Rs_frequency_E_attlist_allele?, 
+        Rs_frequency_E_attlist_popId?, 
+        Rs_frequency_E_attlist_sampleSize?)>
+
+<!ELEMENT Rs_frequency_E_attlist_freq (%REAL;)>
+
+<!ELEMENT Rs_frequency_E_attlist_allele (#PCDATA)>
+
+<!--dbSNP Populaton ID -->
+<!ELEMENT Rs_frequency_E_attlist_popId (%INTEGER;)>
+
+<!ELEMENT Rs_frequency_E_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Rs_frequency_E_frequency EMPTY>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout (
+        RsLinkout_attlist, 
+        RsLinkout_rsLinkout)>
+
+<!ELEMENT RsLinkout_attlist (
+        RsLinkout_attlist_resourceId, 
+        RsLinkout_attlist_linkValue)>
+
+<!--BaseURLList.url_id -->
+<!ELEMENT RsLinkout_attlist_resourceId (#PCDATA)>
+
+<!--
+value to append to ResourceURL.base-url for complete
+						link
+-->
+<!ELEMENT RsLinkout_attlist_linkValue (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout_rsLinkout EMPTY>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct (
+        RsStruct_attlist, 
+        RsStruct_rsStruct)>
+
+<!ELEMENT RsStruct_attlist (
+        RsStruct_attlist_protAcc?, 
+        RsStruct_attlist_protGi?, 
+        RsStruct_attlist_protLoc?, 
+        RsStruct_attlist_protResidue?, 
+        RsStruct_attlist_rsResidue?, 
+        RsStruct_attlist_structGi?, 
+        RsStruct_attlist_structLoc?, 
+        RsStruct_attlist_structResidue?)>
+
+<!--accession of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protAcc (#PCDATA)>
+
+<!--GI of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protGi (%INTEGER;)>
+
+<!--
+position of the residue for the protein
+						GI
+-->
+<!ELEMENT RsStruct_attlist_protLoc (%INTEGER;)>
+
+<!--
+residue specified for protein at prot-loc
+						location
+-->
+<!ELEMENT RsStruct_attlist_protResidue (#PCDATA)>
+
+<!--
+alternative residue specified by variation
+						sequence
+-->
+<!ELEMENT RsStruct_attlist_rsResidue (#PCDATA)>
+
+<!--GI of the structure neighbor -->
+<!ELEMENT RsStruct_attlist_structGi (%INTEGER;)>
+
+<!--
+position of the residue for the structure
+						GI
+-->
+<!ELEMENT RsStruct_attlist_structLoc (%INTEGER;)>
+
+<!--
+residue specified for protein at struct-loc
+						location
+-->
+<!ELEMENT RsStruct_attlist_structResidue (#PCDATA)>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct_rsStruct EMPTY>
+
+<!--data for an individual submission to dbSNP -->
+<!ELEMENT Ss (
+        Ss_attlist, 
+        Ss_sequence)>
+
+<!ELEMENT Ss_attlist (
+        Ss_attlist_ssId, 
+        Ss_attlist_handle, 
+        Ss_attlist_batchId, 
+        Ss_attlist_locSnpId?, 
+        Ss_attlist_subSnpClass?, 
+        Ss_attlist_orient?, 
+        Ss_attlist_strand?, 
+        Ss_attlist_molType?, 
+        Ss_attlist_buildId?, 
+        Ss_attlist_methodClass?, 
+        Ss_attlist_validated?, 
+        Ss_attlist_linkoutUrl?, 
+        Ss_attlist_ssAlias?, 
+        Ss_attlist_alleleOrigin?, 
+        Ss_attlist_clinicalSignificance?)>
+
+<!--dbSNP accession number for submission -->
+<!ELEMENT Ss_attlist_ssId (%INTEGER;)>
+
+<!--Tag for the submitting laboratory -->
+<!ELEMENT Ss_attlist_handle (#PCDATA)>
+
+<!--dbSNP number for batch submission -->
+<!ELEMENT Ss_attlist_batchId (%INTEGER;)>
+
+<!--submission (ss#) submitter ID -->
+<!ELEMENT Ss_attlist_locSnpId (#PCDATA)>
+<!--
+SubSNP classification by type of
+						variation
+-->
+<!ELEMENT Ss_attlist_subSnpClass %ENUM;>
+<!ATTLIST Ss_attlist_subSnpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+<!--
+orientation of refsnp cluster members to refsnp cluster
+						sequence
+-->
+<!ELEMENT Ss_attlist_orient %ENUM;>
+<!ATTLIST Ss_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+<!--
+strand is defined as TOP/BOTTOM by nature of flanking
+						nucleotide sequence
+-->
+<!ELEMENT Ss_attlist_strand %ENUM;>
+<!ATTLIST Ss_attlist_strand value (
+        top |
+        bottom
+        ) #REQUIRED >
+
+
+<!--moltype from Batch table -->
+<!ELEMENT Ss_attlist_molType %ENUM;>
+<!ATTLIST Ss_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+dbSNP build number when ss# was added to a refSNP (rs#)
+						cluster
+-->
+<!ELEMENT Ss_attlist_buildId (%INTEGER;)>
+<!--
+class of method used to assay for the
+						variation
+-->
+<!ELEMENT Ss_attlist_methodClass %ENUM;>
+<!ATTLIST Ss_attlist_methodClass value (
+        dHPLC |
+        hybridize |
+        computed |
+        sSCP |
+        other |
+        unknown |
+        rFLP |
+        sequence
+        ) #REQUIRED >
+
+<!--
+subsnp has been experimentally validated by
+									submitter
+-->
+<!ELEMENT Ss_attlist_validated %ENUM;>
+<!ATTLIST Ss_attlist_validated value (
+        by-submitter |
+        by-frequency |
+        by-cluster
+        ) #REQUIRED >
+
+
+<!--
+append loc-snp-id to this base URL to construct a pointer to
+						submitter data.
+-->
+<!ELEMENT Ss_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Ss_attlist_ssAlias (#PCDATA)>
+
+<!--
+				<xsd:simpleType>
+					<xsd:restriction base="xsd:string">
+						<xsd:enumeration value="unknown"/>
+						<xsd:enumeration value="germline"/>
+						<xsd:enumeration value="somatic"/>
+						<xsd:enumeration value="inherited"/>
+						<xsd:enumeration value="paternal"/>
+						<xsd:enumeration value="maternal"/>
+						<xsd:enumeration value="de-novo"/>
+						<xsd:enumeration value="other"/>
+					</xsd:restriction>
+				</xsd:simpleType>
+-->
+<!ELEMENT Ss_attlist_alleleOrigin (%INTEGER;)>
+
+<!--
+				<xsd:simpleType>
+					<xsd:restriction base="xsd:string">
+						<xsd:enumeration value="unknown"/>
+						<xsd:enumeration value="untested"/>
+						<xsd:enumeration value="non-pathogenic"/>
+						<xsd:enumeration value="probable-non-pathogenic"/>
+						<xsd:enumeration value="probable-pathogenic"/>
+						<xsd:enumeration value="pathogenic"/>
+						<xsd:enumeration value="other"/>
+					</xsd:restriction>
+				</xsd:simpleType>
+-->
+<!ELEMENT Ss_attlist_clinicalSignificance (#PCDATA)>
+
+<!ELEMENT Ss_sequence (
+        Ss_sequence_seq5?, 
+        Ss_sequence_observed, 
+        Ss_sequence_seq3?)>
+
+<!--
+5' sequence that flanks the
+										variation
+-->
+<!ELEMENT Ss_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in
+										ss-list members, correcting for reverse complementation of
+										memebers reported in reverse orientation
+-->
+<!ELEMENT Ss_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the
+										variation
+-->
+<!ELEMENT Ss_sequence_seq3 (#PCDATA)>
+
diff --git a/dtd/Docsum_3_4.dtd b/dtd/Docsum_3_4.dtd
new file mode 100644
index 0000000..89ba0bc
--- /dev/null
+++ b/dtd/Docsum_3_4.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 09/25/2012 23:04:47
+     ============================================ -->
+
+<!-- Docsum_3_4.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % Docsum_3_4_module PUBLIC "-//NCBI//Docsum 3 4 Module//EN" "Docsum_3_4.mod.dtd">
+%Docsum_3_4_module;
diff --git a/dtd/Docsum_3_4.mod.dtd b/dtd/Docsum_3_4.mod.dtd
new file mode 100644
index 0000000..51899a8
--- /dev/null
+++ b/dtd/Docsum_3_4.mod.dtd
@@ -0,0 +1,1594 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 09/25/2012 23:04:47
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "Docsum-3-4"
+================================================= -->
+
+<!--
+ ============================================
+ ::DATATOOL:: Generated from "docsum_3.4.xsd"
+ ::DATATOOL:: by application DATATOOL version 2.1.0
+ ::DATATOOL:: on 08/14/2012 12:01:24
+ ============================================
+ edited with XMLSPY v5 rel. 4 U (http://www.xmlspy.com) by Michael Kholodov (National Library of Medicine) 
+ edited with XMLSpy v2005 rel. 3 U (http://www.altova.com) by Michael Feolo (NCBI/NLM/NIH) 
+-->
+
+
+<!ELEMENT Assay (
+        Assay_attlist, 
+        Assay_method, 
+        Assay_taxonomy, 
+        Assay_strains?, 
+        Assay_comment?, 
+        Assay_citation?)>
+
+<!ELEMENT Assay_attlist (
+        Assay_attlist_handle?, 
+        Assay_attlist_batch?, 
+        Assay_attlist_batchId?, 
+        Assay_attlist_batchType?, 
+        Assay_attlist_molType?, 
+        Assay_attlist_sampleSize?, 
+        Assay_attlist_population?, 
+        Assay_attlist_linkoutUrl?)>
+
+<!ELEMENT Assay_attlist_handle (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batch (#PCDATA)>
+
+<!ELEMENT Assay_attlist_batchId (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_batchType %ENUM;>
+<!ATTLIST Assay_attlist_batchType value (
+        snpassay |
+        validation |
+        doublehit
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_molType %ENUM;>
+<!ATTLIST Assay_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Assay_attlist_population (#PCDATA)>
+
+<!ELEMENT Assay_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Assay_method (
+        Assay_method_eMethod?)>
+
+<!ELEMENT Assay_method_eMethod (
+        Assay_method_eMethod_attlist, 
+        Assay_method_eMethod_exception)>
+
+<!ELEMENT Assay_method_eMethod_attlist (
+        Assay_method_eMethod_attlist_name?, 
+        Assay_method_eMethod_attlist_id?)>
+
+<!--Submitters method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_name (#PCDATA)>
+
+<!--dbSNP method identifier -->
+<!ELEMENT Assay_method_eMethod_attlist_id (#PCDATA)>
+
+<!--
+description of deviation from/addition to
+										given method 
+-->
+<!ELEMENT Assay_method_eMethod_exception (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy (
+        Assay_taxonomy_attlist, 
+        Assay_taxonomy_taxonomy)>
+
+<!ELEMENT Assay_taxonomy_attlist (
+        Assay_taxonomy_attlist_id, 
+        Assay_taxonomy_attlist_organism?)>
+
+<!--
+NCBI taxonomy ID for
+									variation
+-->
+<!ELEMENT Assay_taxonomy_attlist_id (%INTEGER;)>
+
+<!ELEMENT Assay_taxonomy_attlist_organism (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy_taxonomy EMPTY>
+
+<!ELEMENT Assay_strains (Assay_strains_E*)>
+
+
+<!ELEMENT Assay_strains_E (#PCDATA)>
+
+<!ELEMENT Assay_comment (#PCDATA)>
+
+<!ELEMENT Assay_citation (Assay_citation_E*)>
+
+
+<!ELEMENT Assay_citation_E (#PCDATA)>
+
+<!--
+A collection of genome sequence records (curated gene regions (NG's),
+				contigs (NWNT's) and chromosomes (NC/AC's) produced by a genome sequence project.
+				Structure is populated from ContigInfo tables.
+-->
+<!ELEMENT Assembly (
+        Assembly_attlist, 
+        Assembly_component?, 
+        Assembly_snpStat)>
+
+<!ELEMENT Assembly_attlist (
+        Assembly_attlist_dbSnpBuild, 
+        Assembly_attlist_genomeBuild, 
+        Assembly_attlist_groupLabel?, 
+        Assembly_attlist_assemblySource?, 
+        Assembly_attlist_current?, 
+        Assembly_attlist_reference?)>
+
+<!--
+dbSNP build number defining the rsid set aligned to this
+						assembly
+-->
+<!ELEMENT Assembly_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--
+assembly build number with possible 'subbuild' version
+						numbers to reflect updates in gene annotation (human e.g. 34_3, 35_1,
+						36_1)
+-->
+<!ELEMENT Assembly_attlist_genomeBuild (#PCDATA)>
+
+<!--
+High-level classification of the assembly to distinguish
+						reference projects from alternate solutions. GroupLabel field from
+						organism/build-specific ContigInfo tables. "reference" is occasionally used
+						as the preferred assembly; standards will converge as additional organism
+						genome projects are finished. Note that some organism assembly names include
+						extended characters like '~' and '/' that may be incompatible with OS
+						filename conventions.
+-->
+<!ELEMENT Assembly_attlist_groupLabel (#PCDATA)>
+
+<!--
+Name of the group(s) or organization(s) that generated the
+						assembly
+-->
+<!ELEMENT Assembly_attlist_assemblySource (#PCDATA)>
+
+<!--Marks the current genomic assembly -->
+<!ELEMENT Assembly_attlist_current EMPTY>
+<!ATTLIST Assembly_attlist_current value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_attlist_reference EMPTY>
+<!ATTLIST Assembly_attlist_reference value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_component (Component*)>
+
+<!ELEMENT Assembly_snpStat (
+        Assembly_snpStat_attlist, 
+        Assembly_snpStat_snpStat)>
+
+<!ELEMENT Assembly_snpStat_attlist (
+        Assembly_snpStat_attlist_mapWeight, 
+        Assembly_snpStat_attlist_chromCount?, 
+        Assembly_snpStat_attlist_placedContigCount?, 
+        Assembly_snpStat_attlist_unplacedContigCount?, 
+        Assembly_snpStat_attlist_seqlocCount?, 
+        Assembly_snpStat_attlist_hapCount?)>
+<!--
+summary measure of placement precision in the
+									assembly
+-->
+<!ELEMENT Assembly_snpStat_attlist_mapWeight %ENUM;>
+<!ATTLIST Assembly_snpStat_attlist_mapWeight value (
+        unmapped |
+        unique-in-contig |
+        two-hits-in-contig |
+        less-10-hits |
+        multiple-hits
+        ) #REQUIRED >
+
+
+<!--
+number of distinct chromosomes in the
+									mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_chromCount (%INTEGER;)>
+
+<!--
+number of distinct contigs [ gi |
+									accession[.version] ] in the mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_placedContigCount (%INTEGER;)>
+
+<!--
+number of sequence postions to a contig with
+									unknown chromosomal assignment
+-->
+<!ELEMENT Assembly_snpStat_attlist_unplacedContigCount (%INTEGER;)>
+
+<!--
+total number of sequence positions in the
+									mapset
+-->
+<!ELEMENT Assembly_snpStat_attlist_seqlocCount (%INTEGER;)>
+
+<!--
+Number of hits to alternative genomic haplotypes
+									(e.g. HLA DR region, KIR, or pseudo-autosomal regions like PAR)
+									within the assembly mapset. Note that positions on haplotypes
+									defined in other assemblies (a different assembly_group_label
+									value) will not be counted in this value.
+-->
+<!ELEMENT Assembly_snpStat_attlist_hapCount (%INTEGER;)>
+
+<!ELEMENT Assembly_snpStat_snpStat EMPTY>
+
+<!--
+URL value from dbSNP_main.BaseURL links table. attributes provide
+				context information and URL id that is referenced within individual refSNP
+				objects.
+-->
+<!ELEMENT BaseURL (
+        BaseURL_attlist, 
+        BaseURL_baseURL)>
+
+<!ELEMENT BaseURL_attlist (
+        BaseURL_attlist_urlId?, 
+        BaseURL_attlist_resourceName?, 
+        BaseURL_attlist_resourceId?)>
+
+<!--
+Resource identifier from
+								dbSNP_main.baseURL.
+-->
+<!ELEMENT BaseURL_attlist_urlId (%INTEGER;)>
+
+<!--Name of linked resource -->
+<!ELEMENT BaseURL_attlist_resourceName (#PCDATA)>
+
+<!--
+identifier expected by resource for
+								URL
+-->
+<!ELEMENT BaseURL_attlist_resourceId (#PCDATA)>
+
+<!--
+URL value from dbSNP_main.BaseURL links table. attributes provide
+				context information and URL id that is referenced within individual refSNP
+				objects.
+-->
+<!ELEMENT BaseURL_baseURL (#PCDATA)>
+
+
+<!ELEMENT Component (
+        Component_attlist, 
+        Component_mapLoc)>
+
+<!ELEMENT Component_attlist (
+        Component_attlist_componentType?, 
+        Component_attlist_ctgId?, 
+        Component_attlist_accession?, 
+        Component_attlist_name?, 
+        Component_attlist_chromosome?, 
+        Component_attlist_start?, 
+        Component_attlist_end?, 
+        Component_attlist_orientation?, 
+        Component_attlist_gi?, 
+        Component_attlist_groupTerm?, 
+        Component_attlist_contigLabel?)>
+<!--
+type of component: chromosome, contig, gene_region,
+						etc.
+-->
+<!ELEMENT Component_attlist_componentType %ENUM;>
+<!ATTLIST Component_attlist_componentType value (
+        contig |
+        mrna
+        ) #REQUIRED >
+
+
+<!--
+dbSNP contig_id used to join on contig hit / mapset data to
+						these assembly properties
+-->
+<!ELEMENT Component_attlist_ctgId (%INTEGER;)>
+
+<!--
+Accession[.version] for the sequence
+						component
+-->
+<!ELEMENT Component_attlist_accession (#PCDATA)>
+
+<!--
+contig name defined as either a submitter local id, element
+						of a whole genome assembly set, or internal NCBI local
+						id
+-->
+<!ELEMENT Component_attlist_name (#PCDATA)>
+
+<!--
+Organism appropriate chromosome tag, 'Un' reserved for
+						default case of unplaced components
+-->
+<!ELEMENT Component_attlist_chromosome (#PCDATA)>
+
+<!--
+component starting position on the chromosome (base 0
+						inclusive)
+-->
+<!ELEMENT Component_attlist_start (%INTEGER;)>
+
+<!--
+component ending position on the chromosome (base 0
+						inclusive)
+-->
+<!ELEMENT Component_attlist_end (%INTEGER;)>
+<!--
+orientation of this component to chromosome, forward (fwd) =
+						0, reverse (rev) = 1, unknown = NULL in
+						ContigInfo.orient.
+-->
+<!ELEMENT Component_attlist_orientation %ENUM;>
+<!ATTLIST Component_attlist_orientation value (
+        fwd |
+        rev |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+NCBI gi for component sequence (equivalent to
+						accession.version) for nucleotide sequence.
+-->
+<!ELEMENT Component_attlist_gi (#PCDATA)>
+
+<!--
+Identifier label for the genome assembly that defines the
+						contigs in this mapset and their placement within the organism genome.
+-->
+<!ELEMENT Component_attlist_groupTerm (#PCDATA)>
+
+<!--Display label for component -->
+<!ELEMENT Component_attlist_contigLabel (#PCDATA)>
+
+<!ELEMENT Component_mapLoc (MapLoc*)>
+
+<!--Set of dbSNP refSNP docsums, version 3.4 -->
+<!ELEMENT ExchangeSet (
+        ExchangeSet_attlist, 
+        ExchangeSet_sourceDatabase?, 
+        ExchangeSet_rs?, 
+        ExchangeSet_assay?, 
+        ExchangeSet_query?, 
+        ExchangeSet_summary?, 
+        ExchangeSet_baseURL?)>
+
+<!ELEMENT ExchangeSet_attlist (
+        ExchangeSet_attlist_setType?, 
+        ExchangeSet_attlist_setDepth?, 
+        ExchangeSet_attlist_specVersion?, 
+        ExchangeSet_attlist_dbSnpBuild?, 
+        ExchangeSet_attlist_generated?)>
+
+<!--
+set-type: full dump; from query; single
+						refSNP
+-->
+<!ELEMENT ExchangeSet_attlist_setType (#PCDATA)>
+
+<!--
+content depth: brief XML (only refSNP properties and summary
+						subSNP element content); full XML (full refSNP, full subSNP content; all
+						flanking sequences) 
+-->
+<!ELEMENT ExchangeSet_attlist_setDepth (#PCDATA)>
+
+<!--
+version number of docsum.asn/docsum.dtd
+						specification
+-->
+<!ELEMENT ExchangeSet_attlist_specVersion (#PCDATA)>
+
+<!--build number of database for this export -->
+<!ELEMENT ExchangeSet_attlist_dbSnpBuild (%INTEGER;)>
+
+<!--Generated date -->
+<!ELEMENT ExchangeSet_attlist_generated (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase (
+        ExchangeSet_sourceDatabase_attlist, 
+        ExchangeSet_sourceDatabase_sourceDatabase)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_attlist (
+        ExchangeSet_sourceDatabase_attlist_taxId, 
+        ExchangeSet_sourceDatabase_attlist_organism, 
+        ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr?, 
+        ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr?)>
+
+<!--
+NCBI taxonomy ID for
+									variation
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_taxId (%INTEGER;)>
+
+<!--
+common name for species used as part of database
+									name.
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_organism (#PCDATA)>
+
+<!--organism abbreviation used in dbSNP. -->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_dbSnpOrgAbbr (#PCDATA)>
+
+<!--
+organism abbreviation used within NCBI genome
+									pipeline data dumps.
+-->
+<!ELEMENT ExchangeSet_sourceDatabase_attlist_gpipeOrgAbbr (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase_sourceDatabase EMPTY>
+
+<!ELEMENT ExchangeSet_rs (Rs*)>
+
+<!ELEMENT ExchangeSet_assay (Assay)>
+
+<!ELEMENT ExchangeSet_query (
+        ExchangeSet_query_attlist, 
+        ExchangeSet_query_query)>
+
+<!ELEMENT ExchangeSet_query_attlist (
+        ExchangeSet_query_attlist_date?, 
+        ExchangeSet_query_attlist_string?)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT ExchangeSet_query_attlist_date (#PCDATA)>
+
+<!--
+Query terms or search
+									constraints
+-->
+<!ELEMENT ExchangeSet_query_attlist_string (#PCDATA)>
+
+<!ELEMENT ExchangeSet_query_query EMPTY>
+
+<!ELEMENT ExchangeSet_summary (
+        ExchangeSet_summary_attlist, 
+        ExchangeSet_summary_summary)>
+
+<!ELEMENT ExchangeSet_summary_attlist (
+        ExchangeSet_summary_attlist_numRsIds?, 
+        ExchangeSet_summary_attlist_totalSeqLength?, 
+        ExchangeSet_summary_attlist_numContigHits?, 
+        ExchangeSet_summary_attlist_numGeneHits?, 
+        ExchangeSet_summary_attlist_numGiHits?, 
+        ExchangeSet_summary_attlist_num3dStructs?, 
+        ExchangeSet_summary_attlist_numAlleleFreqs?, 
+        ExchangeSet_summary_attlist_numStsHits?, 
+        ExchangeSet_summary_attlist_numUnigeneCids?)>
+
+<!--Total number of refsnp-ids in this exchange set -->
+<!ELEMENT ExchangeSet_summary_attlist_numRsIds (%INTEGER;)>
+
+<!--
+Total length of exemplar flanking
+									sequences
+-->
+<!ELEMENT ExchangeSet_summary_attlist_totalSeqLength (%INTEGER;)>
+
+<!--
+Total number of contig locations from
+									SNPContigLoc
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numContigHits (%INTEGER;)>
+
+<!--
+Total number of locus ids from
+									SNPContigLocusId
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numGeneHits (%INTEGER;)>
+
+<!--
+Total number of gi hits from
+									MapLink
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numGiHits (%INTEGER;)>
+
+<!--
+Total number of 3D structures from
+									SNP3D
+-->
+<!ELEMENT ExchangeSet_summary_attlist_num3dStructs (%INTEGER;)>
+
+<!--
+Total number of allele frequences from
+									SubPopAllele
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numAlleleFreqs (%INTEGER;)>
+
+<!--
+Total number of STS hits from
+									SnpInSts
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numStsHits (%INTEGER;)>
+
+<!--
+Total number of unigene cluster ids from
+									UnigeneSnp
+-->
+<!ELEMENT ExchangeSet_summary_attlist_numUnigeneCids (%INTEGER;)>
+
+<!ELEMENT ExchangeSet_summary_summary EMPTY>
+
+<!ELEMENT ExchangeSet_baseURL (BaseURL*)>
+
+<!--
+functional relationship of SNP (and possibly alleles) to genes at
+				contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx
+				tables.
+-->
+<!ELEMENT FxnSet (
+        FxnSet_attlist, 
+        FxnSet_fxnSet)>
+
+<!ELEMENT FxnSet_attlist (
+        FxnSet_attlist_geneId?, 
+        FxnSet_attlist_symbol?, 
+        FxnSet_attlist_mrnaAcc?, 
+        FxnSet_attlist_mrnaVer?, 
+        FxnSet_attlist_protAcc?, 
+        FxnSet_attlist_protVer?, 
+        FxnSet_attlist_fxnClass?, 
+        FxnSet_attlist_readingFrame?, 
+        FxnSet_attlist_allele?, 
+        FxnSet_attlist_residue?, 
+        FxnSet_attlist_aaPosition?, 
+        FxnSet_attlist_mrnaPosition?, 
+        FxnSet_attlist_soTerm?)>
+
+<!--gene-id of gene as aligned to contig -->
+<!ELEMENT FxnSet_attlist_geneId (%INTEGER;)>
+
+<!--
+symbol (official if present in Entrez Gene) of
+						gene
+-->
+<!ELEMENT FxnSet_attlist_symbol (#PCDATA)>
+
+<!--mRNA accession if variation in transcript -->
+<!ELEMENT FxnSet_attlist_mrnaAcc (#PCDATA)>
+
+<!--
+mRNA sequence version if variation is in
+						transcripot
+-->
+<!ELEMENT FxnSet_attlist_mrnaVer (%INTEGER;)>
+
+<!--protein accession if variation in protein -->
+<!ELEMENT FxnSet_attlist_protAcc (#PCDATA)>
+
+<!--
+protein version if variation is in
+						protein
+-->
+<!ELEMENT FxnSet_attlist_protVer (%INTEGER;)>
+<!--
+variation in region of gene, but not in
+										transcript - deprecated
+-->
+<!ELEMENT FxnSet_attlist_fxnClass %ENUM;>
+<!ATTLIST FxnSet_attlist_fxnClass value (
+        locus-region |
+        coding-unknown |
+        synonymous-codon |
+        non-synonymous-codon |
+        mrna-utr |
+        intron-variant |
+        splice-region-variant |
+        reference |
+        coding-exception |
+        coding-sequence-variant |
+        nc-transcript-variant |
+        downstream-variant-500B |
+        upstream-variant-2KB |
+        nonsense |
+        missense |
+        frameshift-variant |
+        utr-variant-3-prime |
+        utr-variant-5-prime |
+        splice-acceptor-variant |
+        splice-donor-variant |
+        cds-indel |
+        stop-gained |
+        stop-lost |
+        complex-change-in-transcript |
+        incomplete-terminal-codon-variant |
+        nmd-transcript-variant |
+        mature-miRNA-variant |
+        upstream-variant-5KB |
+        downstream-variant-5KB |
+        intergenic
+        ) #REQUIRED >
+
+
+<!ELEMENT FxnSet_attlist_readingFrame (%INTEGER;)>
+
+<!--
+variation allele: * suffix indicates allele of contig at this
+						location
+-->
+<!ELEMENT FxnSet_attlist_allele (#PCDATA)>
+
+<!--translated amino acid residue for allele -->
+<!ELEMENT FxnSet_attlist_residue (#PCDATA)>
+
+<!--
+position of the variant residue in peptide
+						sequence
+-->
+<!ELEMENT FxnSet_attlist_aaPosition (%INTEGER;)>
+
+<!ELEMENT FxnSet_attlist_mrnaPosition (%INTEGER;)>
+
+<!ELEMENT FxnSet_attlist_soTerm (#PCDATA)>
+
+<!--
+functional relationship of SNP (and possibly alleles) to genes at
+				contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx
+				tables.
+-->
+<!ELEMENT FxnSet_fxnSet EMPTY>
+
+<!--
+Position of a single hit of a variation on a
+				contig
+-->
+<!ELEMENT MapLoc (
+        MapLoc_attlist, 
+        MapLoc_fxnSet?)>
+
+<!ELEMENT MapLoc_attlist (
+        MapLoc_attlist_asnFrom, 
+        MapLoc_attlist_asnTo, 
+        MapLoc_attlist_locType, 
+        MapLoc_attlist_alnQuality?, 
+        MapLoc_attlist_orient?, 
+        MapLoc_attlist_physMapInt?, 
+        MapLoc_attlist_leftFlankNeighborPos?, 
+        MapLoc_attlist_rightFlankNeighborPos?, 
+        MapLoc_attlist_leftContigNeighborPos?, 
+        MapLoc_attlist_rightContigNeighborPos?, 
+        MapLoc_attlist_numberOfMismatches?, 
+        MapLoc_attlist_numberOfDeletions?, 
+        MapLoc_attlist_numberOfInsertions?, 
+        MapLoc_attlist_refAllele?)>
+
+<!--
+beginning of variation as feature on
+						contig
+-->
+<!ELEMENT MapLoc_attlist_asnFrom (%INTEGER;)>
+
+<!--
+end position of variation as feature on
+						contig
+-->
+<!ELEMENT MapLoc_attlist_asnTo (%INTEGER;)>
+<!--
+defines the seq-loc symbol if asn_from !=
+						asn_to
+-->
+<!ELEMENT MapLoc_attlist_locType %ENUM;>
+<!ATTLIST MapLoc_attlist_locType value (
+        insertion |
+        exact |
+        deletion |
+        range-ins |
+        range-exact |
+        range-del
+        ) #REQUIRED >
+
+
+<!--alignment qualiity -->
+<!ELEMENT MapLoc_attlist_alnQuality (%REAL;)>
+<!--
+orientation of refSNP sequence to contig
+						sequence
+-->
+<!ELEMENT MapLoc_attlist_orient %ENUM;>
+<!ATTLIST MapLoc_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!--
+chromosome position as integer for
+						sorting
+-->
+<!ELEMENT MapLoc_attlist_physMapInt (%INTEGER;)>
+
+<!--
+nearest aligned position in 5' flanking sequence of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_leftFlankNeighborPos (%INTEGER;)>
+
+<!--nearest aligned position in 3' flanking sequence of snp -->
+<!ELEMENT MapLoc_attlist_rightFlankNeighborPos (%INTEGER;)>
+
+<!--
+nearest aligned position in 5' contig alignment of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_leftContigNeighborPos (%INTEGER;)>
+
+<!--
+nearest aligned position in 3' contig alignment of
+						snp
+-->
+<!ELEMENT MapLoc_attlist_rightContigNeighborPos (%INTEGER;)>
+
+<!--
+number of Mismatched positions in this
+						alignment
+-->
+<!ELEMENT MapLoc_attlist_numberOfMismatches (%INTEGER;)>
+
+<!--number of deletions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfDeletions (%INTEGER;)>
+
+<!--number of insetions in this alignment -->
+<!ELEMENT MapLoc_attlist_numberOfInsertions (%INTEGER;)>
+
+<!ELEMENT MapLoc_attlist_refAllele (#PCDATA)>
+
+<!ELEMENT MapLoc_fxnSet (FxnSet*)>
+
+
+<!ELEMENT PrimarySequence (
+        PrimarySequence_attlist, 
+        PrimarySequence_mapLoc)>
+
+<!ELEMENT PrimarySequence_attlist (
+        PrimarySequence_attlist_dbSnpBuild, 
+        PrimarySequence_attlist_gi, 
+        PrimarySequence_attlist_source?, 
+        PrimarySequence_attlist_accession?)>
+
+<!ELEMENT PrimarySequence_attlist_dbSnpBuild (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_gi (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_attlist_source %ENUM;>
+<!ATTLIST PrimarySequence_attlist_source value (
+        submitter |
+        blastmb |
+        xm |
+        remap |
+        hgvs
+        ) #REQUIRED >
+
+
+<!ELEMENT PrimarySequence_attlist_accession (#PCDATA)>
+
+<!ELEMENT PrimarySequence_mapLoc (MapLoc*)>
+
+<!--
+defines the docsum structure for refSNP clusters, where a refSNP
+				cluster (rs) is a grouping of individual dbSNP submissions that all refer to the
+				same variation. The refsnp provides a single unified record for annotation of NCBI
+				resources such as reference genome sequence.
+-->
+<!ELEMENT Rs (
+        Rs_attlist, 
+        Rs_het?, 
+        Rs_validation, 
+        Rs_create, 
+        Rs_update?, 
+        Rs_sequence, 
+        Rs_ss, 
+        Rs_assembly?, 
+        Rs_primarySequence?, 
+        Rs_rsStruct?, 
+        Rs_rsLinkout?, 
+        Rs_mergeHistory?, 
+        Rs_hgvs?, 
+        Rs_alleleOrigin?, 
+        Rs_phenotype?, 
+        Rs_bioSource?, 
+        Rs_frequency?)>
+
+<!ELEMENT Rs_attlist (
+        Rs_attlist_rsId, 
+        Rs_attlist_snpClass, 
+        Rs_attlist_snpType, 
+        Rs_attlist_molType, 
+        Rs_attlist_validProbMin?, 
+        Rs_attlist_validProbMax?, 
+        Rs_attlist_genotype?, 
+        Rs_attlist_bitField?, 
+        Rs_attlist_taxId?)>
+
+<!--refSNP (rs) number -->
+<!ELEMENT Rs_attlist_rsId (%INTEGER;)>
+
+<!ELEMENT Rs_attlist_snpClass %ENUM;>
+<!ATTLIST Rs_attlist_snpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_snpType %ENUM;>
+<!ATTLIST Rs_attlist_snpType value (
+        notwithdrawn |
+        artifact |
+        gene-duplication |
+        duplicate-submission |
+        notspecified |
+        ambiguous-location |
+        low-map-quality
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_molType %ENUM;>
+<!ATTLIST Rs_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+minimum reported success rate of all submissions in
+						cluster
+-->
+<!ELEMENT Rs_attlist_validProbMin (%INTEGER;)>
+
+<!--
+maximum reported success rate of all submissions in
+						cluster
+-->
+<!ELEMENT Rs_attlist_validProbMax (%INTEGER;)>
+
+<!--
+at least one genotype reported for this
+						refSNP
+-->
+<!ELEMENT Rs_attlist_genotype EMPTY>
+<!ATTLIST Rs_attlist_genotype value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_attlist_bitField (#PCDATA)>
+
+<!ELEMENT Rs_attlist_taxId (%INTEGER;)>
+
+<!ELEMENT Rs_het (
+        Rs_het_attlist, 
+        Rs_het_het)>
+
+<!ELEMENT Rs_het_attlist (
+        Rs_het_attlist_type, 
+        Rs_het_attlist_value, 
+        Rs_het_attlist_stdError?)>
+<!--
+Est=Estimated average het from allele
+									frequencies, Obs=Observed from genotype data
+-->
+<!ELEMENT Rs_het_attlist_type %ENUM;>
+<!ATTLIST Rs_het_attlist_type value (
+        est |
+        obs
+        ) #REQUIRED >
+
+
+<!--Heterozygosity -->
+<!ELEMENT Rs_het_attlist_value (%REAL;)>
+
+<!--
+Standard error of Het
+									estimate
+-->
+<!ELEMENT Rs_het_attlist_stdError (%REAL;)>
+
+<!ELEMENT Rs_het_het EMPTY>
+
+<!ELEMENT Rs_validation (
+        Rs_validation_attlist, 
+        Rs_validation_otherPopBatchId?, 
+        Rs_validation_twoHit2AlleleBatchId?, 
+        Rs_validation_frequencyClass?, 
+        Rs_validation_hapMapPhase?, 
+        Rs_validation_tGPPhase?, 
+        Rs_validation_suspectEvidence?)>
+
+<!ELEMENT Rs_validation_attlist (
+        Rs_validation_attlist_byCluster?, 
+        Rs_validation_attlist_byFrequency?, 
+        Rs_validation_attlist_byOtherPop?, 
+        Rs_validation_attlist_by2Hit2Allele?, 
+        Rs_validation_attlist_byHapMap?, 
+        Rs_validation_attlist_by1000G?, 
+        Rs_validation_attlist_suspect?)>
+
+<!--
+at least one subsnp in cluster has frequency data
+									submitted
+-->
+<!ELEMENT Rs_validation_attlist_byCluster EMPTY>
+<!ATTLIST Rs_validation_attlist_byCluster value ( true | false ) #REQUIRED >
+
+
+<!--Validated by allele frequency -->
+<!ELEMENT Rs_validation_attlist_byFrequency EMPTY>
+<!ATTLIST Rs_validation_attlist_byFrequency value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_validation_attlist_byOtherPop EMPTY>
+<!ATTLIST Rs_validation_attlist_byOtherPop value ( true | false ) #REQUIRED >
+
+
+<!--
+cluster has 2+ submissions, with 1+ submissions
+									assayed with a non-computational method
+-->
+<!ELEMENT Rs_validation_attlist_by2Hit2Allele EMPTY>
+<!ATTLIST Rs_validation_attlist_by2Hit2Allele value ( true | false ) #REQUIRED >
+
+
+<!--Validated by HapMap Project  -->
+<!ELEMENT Rs_validation_attlist_byHapMap EMPTY>
+<!ATTLIST Rs_validation_attlist_byHapMap value ( true | false ) #REQUIRED >
+
+
+<!--Validated by 1000 Genomes Project -->
+<!ELEMENT Rs_validation_attlist_by1000G EMPTY>
+<!ATTLIST Rs_validation_attlist_by1000G value ( true | false ) #REQUIRED >
+
+
+<!--Suspected to be false SNP -->
+<!ELEMENT Rs_validation_attlist_suspect EMPTY>
+<!ATTLIST Rs_validation_attlist_suspect value ( true | false ) #REQUIRED >
+
+
+<!--
+dbSNP batch-id's for other pop snp validation
+										data.
+-->
+<!ELEMENT Rs_validation_otherPopBatchId (Rs_validation_otherPopBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_otherPopBatchId_E (%INTEGER;)>
+
+<!--
+dbSNP batch-id's for double-hit snp
+										validation data. Use batch-id to get methods, etc.
+-->
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId (Rs_validation_twoHit2AlleleBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId_E (%INTEGER;)>
+
+<!--
+Frequency validation class (1) low frequency
+										variation that is cited in journal and other reputable
+										sources (2) greater than 5 percent minor allele freq in each
+										and all populations (4) greater than 5 percent minor allele
+										freq in 1+ populations (8) if the variant has 2+ minor
+										allele count based on freq or genotype data (16) less than 1
+										percent minor allele freq in each and all populations (32)
+										less than 1 percent minor freq in 1+ populations
+-->
+<!ELEMENT Rs_validation_frequencyClass (Rs_validation_frequencyClass_E*)>
+
+
+<!ELEMENT Rs_validation_frequencyClass_E (%INTEGER;)>
+
+<!--
+alidated by HapMap Project phase1-genotyped
+										(1), Phase 1 genotyped; filtered, non-redundant
+										phase2-genotyped (2), Phase 2 genotyped; filtered,
+										non-redundant phase3-genotyped (4) Phase 3 genotyped;
+										filtered, non-redundant 
+-->
+<!ELEMENT Rs_validation_hapMapPhase (Rs_validation_hapMapPhase_E*)>
+
+
+<!ELEMENT Rs_validation_hapMapPhase_E (%INTEGER;)>
+
+<!--
+Validated by 1000 Genomes Project (TGP) pilot
+										1 (1), pilot 2 (2), pilot 3 (4) 
+-->
+<!ELEMENT Rs_validation_tGPPhase (Rs_validation_tGPPhase_E*)>
+
+
+<!ELEMENT Rs_validation_tGPPhase_E (%INTEGER;)>
+
+<!--
+Suspected to be false SNP evidence Single
+										Nucleotide Difference - paralogous genes (1), Genotype or
+										base calling errors (2), Submission evidence or errors (4),
+										Others (8) 
+-->
+<!ELEMENT Rs_validation_suspectEvidence (Rs_validation_suspectEvidence_E*)>
+
+
+<!ELEMENT Rs_validation_suspectEvidence_E (#PCDATA)>
+<!--
+date the refsnp cluster was
+							instantiated
+date the refsnp cluster was
+							instantiated
+-->
+<!ELEMENT Rs_create (
+        Rs_create_attlist, 
+        Rs_create_create)>
+
+<!ELEMENT Rs_create_attlist (
+        Rs_create_attlist_build?, 
+        Rs_create_attlist_date?)>
+
+<!--
+build number when the cluster was
+									created
+-->
+<!ELEMENT Rs_create_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_create_attlist_date (#PCDATA)>
+
+<!--
+date the refsnp cluster was
+							instantiated
+-->
+<!ELEMENT Rs_create_create EMPTY>
+<!--
+most recent date the cluster was updated (member added or
+							deleted)
+most recent date the cluster was updated (member added or
+							deleted)
+-->
+<!ELEMENT Rs_update (
+        Rs_update_attlist, 
+        Rs_update_update)>
+
+<!ELEMENT Rs_update_attlist (
+        Rs_update_attlist_build?, 
+        Rs_update_attlist_date?)>
+
+<!--
+build number when the cluster was
+									updated
+-->
+<!ELEMENT Rs_update_attlist_build (%INTEGER;)>
+
+<!--yyyy-mm-dd -->
+<!ELEMENT Rs_update_attlist_date (#PCDATA)>
+
+<!--
+most recent date the cluster was updated (member added or
+							deleted)
+-->
+<!ELEMENT Rs_update_update EMPTY>
+
+<!ELEMENT Rs_sequence (
+        Rs_sequence_attlist, 
+        Rs_sequence_seq5?, 
+        Rs_sequence_observed, 
+        Rs_sequence_seq3?)>
+
+<!ELEMENT Rs_sequence_attlist (
+        Rs_sequence_attlist_exemplarSs, 
+        Rs_sequence_attlist_ancestralAllele?)>
+
+<!--
+dbSNP ss# selected as source of refSNP flanking
+									sequence, ss# part of ss-list below 
+-->
+<!ELEMENT Rs_sequence_attlist_exemplarSs (%INTEGER;)>
+
+<!ELEMENT Rs_sequence_attlist_ancestralAllele (#PCDATA)>
+
+<!--
+5' sequence that flanks the
+										variation
+-->
+<!ELEMENT Rs_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in
+										ss-list members, correcting for reverse complementation of
+										members reported in reverse orientation
+-->
+<!ELEMENT Rs_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the
+										variation
+-->
+<!ELEMENT Rs_sequence_seq3 (#PCDATA)>
+
+<!ELEMENT Rs_ss (Ss*)>
+
+<!ELEMENT Rs_assembly (Assembly*)>
+
+<!ELEMENT Rs_primarySequence (PrimarySequence*)>
+
+<!ELEMENT Rs_rsStruct (RsStruct*)>
+
+<!ELEMENT Rs_rsLinkout (RsLinkout*)>
+
+<!ELEMENT Rs_mergeHistory (Rs_mergeHistory_E*)>
+
+
+<!ELEMENT Rs_mergeHistory_E (
+        Rs_mergeHistory_E_attlist, 
+        Rs_mergeHistory_E_mergeHistory)>
+
+<!ELEMENT Rs_mergeHistory_E_attlist (
+        Rs_mergeHistory_E_attlist_rsId, 
+        Rs_mergeHistory_E_attlist_buildId?, 
+        Rs_mergeHistory_E_attlist_orientFlip?)>
+
+<!--
+previously issued rs id whose member assays have
+									now been merged
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_rsId (%INTEGER;)>
+
+<!--
+build id when rs id was merged into parent
+									rs
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_buildId (%INTEGER;)>
+
+<!--
+TRUE if strand of rs id is reverse to parent
+									object's current strand
+-->
+<!ELEMENT Rs_mergeHistory_E_attlist_orientFlip EMPTY>
+<!ATTLIST Rs_mergeHistory_E_attlist_orientFlip value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_mergeHistory_E_mergeHistory EMPTY>
+
+<!-- HGVS name list  -->
+<!ELEMENT Rs_hgvs (Rs_hgvs_E*)>
+
+
+<!ELEMENT Rs_hgvs_E (#PCDATA)>
+<!--
+							origin of this allele, if known
+							note that these are powers-of-two, and represent bits; thus, we can
+							represent more than one state simultaneously through a bitwise OR
+							unknown         (0),
+							germline        (1),
+							somatic         (2),
+							inherited       (4),
+							paternal        (8),
+							maternal        (16),
+							de-novo         (32),
+							biparental      (64),
+							uniparental     (128),
+							not-tested      (256),
+							tested-inconclusive (512),
+							origin of this allele, if known
+							note that these are powers-of-two, and represent bits; thus, we can
+							represent more than one state simultaneously through a bitwise OR
+							unknown         (0),
+							germline        (1),
+							somatic         (2),
+							inherited       (4),
+							paternal        (8),
+							maternal        (16),
+							de-novo         (32),
+							biparental      (64),
+							uniparental     (128),
+							not-tested      (256),
+							tested-inconclusive (512),
+-->
+<!ELEMENT Rs_alleleOrigin (Rs_alleleOrigin_E*)>
+
+
+<!ELEMENT Rs_alleleOrigin_E (
+        Rs_alleleOrigin_E_attlist, 
+        Rs_alleleOrigin_E_alleleOrigin)>
+
+<!ELEMENT Rs_alleleOrigin_E_attlist (
+        Rs_alleleOrigin_E_attlist_allele?)>
+
+<!ELEMENT Rs_alleleOrigin_E_attlist_allele (#PCDATA)>
+
+<!--
+							origin of this allele, if known
+							note that these are powers-of-two, and represent bits; thus, we can
+							represent more than one state simultaneously through a bitwise OR
+							unknown         (0),
+							germline        (1),
+							somatic         (2),
+							inherited       (4),
+							paternal        (8),
+							maternal        (16),
+							de-novo         (32),
+							biparental      (64),
+							uniparental     (128),
+							not-tested      (256),
+							tested-inconclusive (512),
+-->
+<!ELEMENT Rs_alleleOrigin_E_alleleOrigin (%INTEGER;)>
+
+<!ELEMENT Rs_phenotype (Rs_phenotype_E*)>
+
+
+<!ELEMENT Rs_phenotype_E (
+        Rs_phenotype_E_clinicalSignificance?)>
+
+<!--
+										unknown                 (0),
+										untested                (1),
+										non-pathogenic          (2),
+										probable-non-pathogenic (3),
+										probable-pathogenic     (4),
+										pathogenic              (5),
+										drug response           (6),
+										other                   (255)
+-->
+<!ELEMENT Rs_phenotype_E_clinicalSignificance (Rs_phenotype_E_clinicalSignificance_E*)>
+
+
+<!ELEMENT Rs_phenotype_E_clinicalSignificance_E (#PCDATA)>
+
+<!ELEMENT Rs_bioSource (Rs_bioSource_E*)>
+
+
+<!ELEMENT Rs_bioSource_E (
+        Rs_bioSource_E_genome?, 
+        Rs_bioSource_E_origin?)>
+
+<!--
+										unknown (0) ,
+										genomic (1) ,
+										chloroplast (2) ,
+										chromoplast (3) ,
+										kinetoplast (4) ,
+										mitochondrion (5) ,
+										plastid (6) ,
+										macronuclear (7) ,
+										extrachrom (8) ,
+										plasmid (9) ,
+										transposon (10) ,
+										insertion-seq (11) ,
+										cyanelle (12) ,
+										proviral (13) ,
+										virion (14) ,
+										nucleomorph (15) ,
+										apicoplast (16) ,
+										leucoplast (17) ,
+										proplastid (18) ,
+										endogenous-virus (19) ,
+										hydrogenosome (20) ,
+										chromosome (21) ,
+										chromatophore (22)
+-->
+<!ELEMENT Rs_bioSource_E_genome (Rs_bioSource_E_genome_E*)>
+
+
+<!ELEMENT Rs_bioSource_E_genome_E (#PCDATA)>
+
+<!--
+										unknown (0) ,
+										natural (1) ,                    normal biological entity
+										natmut (2) ,                    naturally occurring mutant
+										mut (3) ,                        artificially mutagenized
+										artificial (4) ,                 artificially engineered
+										synthetic (5) ,                 purely synthetic
+										other (255)
+-->
+<!ELEMENT Rs_bioSource_E_origin (Rs_bioSource_E_origin_E*)>
+
+
+<!ELEMENT Rs_bioSource_E_origin_E (#PCDATA)>
+
+<!ELEMENT Rs_frequency (Rs_frequency_E*)>
+
+
+<!ELEMENT Rs_frequency_E (
+        Rs_frequency_E_attlist, 
+        Rs_frequency_E_frequency)>
+
+<!ELEMENT Rs_frequency_E_attlist (
+        Rs_frequency_E_attlist_freq?, 
+        Rs_frequency_E_attlist_allele?, 
+        Rs_frequency_E_attlist_popId?, 
+        Rs_frequency_E_attlist_sampleSize?)>
+
+<!ELEMENT Rs_frequency_E_attlist_freq (%REAL;)>
+
+<!ELEMENT Rs_frequency_E_attlist_allele (#PCDATA)>
+
+<!--dbSNP Populaton ID -->
+<!ELEMENT Rs_frequency_E_attlist_popId (%INTEGER;)>
+
+<!ELEMENT Rs_frequency_E_attlist_sampleSize (%INTEGER;)>
+
+<!ELEMENT Rs_frequency_E_frequency EMPTY>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout (
+        RsLinkout_attlist, 
+        RsLinkout_rsLinkout)>
+
+<!ELEMENT RsLinkout_attlist (
+        RsLinkout_attlist_resourceId, 
+        RsLinkout_attlist_linkValue)>
+
+<!--BaseURLList.url_id -->
+<!ELEMENT RsLinkout_attlist_resourceId (#PCDATA)>
+
+<!--
+value to append to ResourceURL.base-url for complete
+						link
+-->
+<!ELEMENT RsLinkout_attlist_linkValue (#PCDATA)>
+
+<!--link data for another resource -->
+<!ELEMENT RsLinkout_rsLinkout EMPTY>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct (
+        RsStruct_attlist, 
+        RsStruct_rsStruct)>
+
+<!ELEMENT RsStruct_attlist (
+        RsStruct_attlist_protAcc?, 
+        RsStruct_attlist_protGi?, 
+        RsStruct_attlist_protLoc?, 
+        RsStruct_attlist_protResidue?, 
+        RsStruct_attlist_rsResidue?, 
+        RsStruct_attlist_structGi?, 
+        RsStruct_attlist_structLoc?, 
+        RsStruct_attlist_structResidue?)>
+
+<!--accession of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protAcc (#PCDATA)>
+
+<!--GI of the protein with variation -->
+<!ELEMENT RsStruct_attlist_protGi (%INTEGER;)>
+
+<!--
+position of the residue for the protein
+						GI
+-->
+<!ELEMENT RsStruct_attlist_protLoc (%INTEGER;)>
+
+<!--
+residue specified for protein at prot-loc
+						location
+-->
+<!ELEMENT RsStruct_attlist_protResidue (#PCDATA)>
+
+<!--
+alternative residue specified by variation
+						sequence
+-->
+<!ELEMENT RsStruct_attlist_rsResidue (#PCDATA)>
+
+<!--GI of the structure neighbor -->
+<!ELEMENT RsStruct_attlist_structGi (%INTEGER;)>
+
+<!--
+position of the residue for the structure
+						GI
+-->
+<!ELEMENT RsStruct_attlist_structLoc (%INTEGER;)>
+
+<!--
+residue specified for protein at struct-loc
+						location
+-->
+<!ELEMENT RsStruct_attlist_structResidue (#PCDATA)>
+
+<!--structure information for SNP -->
+<!ELEMENT RsStruct_rsStruct EMPTY>
+
+<!--data for an individual submission to dbSNP -->
+<!ELEMENT Ss (
+        Ss_attlist, 
+        Ss_sequence)>
+
+<!ELEMENT Ss_attlist (
+        Ss_attlist_ssId, 
+        Ss_attlist_handle, 
+        Ss_attlist_batchId, 
+        Ss_attlist_locSnpId?, 
+        Ss_attlist_subSnpClass?, 
+        Ss_attlist_orient?, 
+        Ss_attlist_strand?, 
+        Ss_attlist_molType?, 
+        Ss_attlist_buildId?, 
+        Ss_attlist_methodClass?, 
+        Ss_attlist_validated?, 
+        Ss_attlist_linkoutUrl?, 
+        Ss_attlist_ssAlias?, 
+        Ss_attlist_alleleOrigin?, 
+        Ss_attlist_clinicalSignificance?)>
+
+<!--dbSNP accession number for submission -->
+<!ELEMENT Ss_attlist_ssId (%INTEGER;)>
+
+<!--Tag for the submitting laboratory -->
+<!ELEMENT Ss_attlist_handle (#PCDATA)>
+
+<!--dbSNP number for batch submission -->
+<!ELEMENT Ss_attlist_batchId (%INTEGER;)>
+
+<!--submission (ss#) submitter ID -->
+<!ELEMENT Ss_attlist_locSnpId (#PCDATA)>
+<!--
+SubSNP classification by type of
+						variation
+-->
+<!ELEMENT Ss_attlist_subSnpClass %ENUM;>
+<!ATTLIST Ss_attlist_subSnpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+<!--
+orientation of refsnp cluster members to refsnp cluster
+						sequence
+-->
+<!ELEMENT Ss_attlist_orient %ENUM;>
+<!ATTLIST Ss_attlist_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+<!--
+strand is defined as TOP/BOTTOM by nature of flanking
+						nucleotide sequence
+-->
+<!ELEMENT Ss_attlist_strand %ENUM;>
+<!ATTLIST Ss_attlist_strand value (
+        top |
+        bottom
+        ) #REQUIRED >
+
+
+<!--moltype from Batch table -->
+<!ELEMENT Ss_attlist_molType %ENUM;>
+<!ATTLIST Ss_attlist_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!--
+dbSNP build number when ss# was added to a refSNP (rs#)
+						cluster
+-->
+<!ELEMENT Ss_attlist_buildId (%INTEGER;)>
+<!--
+class of method used to assay for the
+						variation
+-->
+<!ELEMENT Ss_attlist_methodClass %ENUM;>
+<!ATTLIST Ss_attlist_methodClass value (
+        dHPLC |
+        hybridize |
+        computed |
+        sSCP |
+        other |
+        unknown |
+        rFLP |
+        sequence
+        ) #REQUIRED >
+
+<!--
+subsnp has been experimentally validated by
+									submitter
+-->
+<!ELEMENT Ss_attlist_validated %ENUM;>
+<!ATTLIST Ss_attlist_validated value (
+        by-submitter |
+        by-frequency |
+        by-cluster
+        ) #REQUIRED >
+
+
+<!--
+append loc-snp-id to this base URL to construct a pointer to
+						submitter data.
+-->
+<!ELEMENT Ss_attlist_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Ss_attlist_ssAlias (#PCDATA)>
+
+<!--
+				<xsd:simpleType>
+					<xsd:restriction base="xsd:string">
+						<xsd:enumeration value="unknown"/>
+						<xsd:enumeration value="germline"/>
+						<xsd:enumeration value="somatic"/>
+						<xsd:enumeration value="inherited"/>
+						<xsd:enumeration value="paternal"/>
+						<xsd:enumeration value="maternal"/>
+						<xsd:enumeration value="de-novo"/>
+						<xsd:enumeration value="other"/>
+					</xsd:restriction>
+				</xsd:simpleType>
+-->
+<!ELEMENT Ss_attlist_alleleOrigin (%INTEGER;)>
+
+<!--
+				<xsd:simpleType>
+					<xsd:restriction base="xsd:string">
+						<xsd:enumeration value="unknown"/>
+						<xsd:enumeration value="untested"/>
+						<xsd:enumeration value="non-pathogenic"/>
+						<xsd:enumeration value="probable-non-pathogenic"/>
+						<xsd:enumeration value="probable-pathogenic"/>
+						<xsd:enumeration value="pathogenic"/>
+						<xsd:enumeration value="other"/>
+					</xsd:restriction>
+				</xsd:simpleType>
+-->
+<!ELEMENT Ss_attlist_clinicalSignificance (#PCDATA)>
+
+<!ELEMENT Ss_sequence (
+        Ss_sequence_seq5?, 
+        Ss_sequence_observed, 
+        Ss_sequence_seq3?)>
+
+<!--
+5' sequence that flanks the
+										variation
+-->
+<!ELEMENT Ss_sequence_seq5 (#PCDATA)>
+
+<!--
+list of all nucleotide alleles observed in
+										ss-list members, correcting for reverse complementation of
+										memebers reported in reverse orientation
+-->
+<!ELEMENT Ss_sequence_observed (#PCDATA)>
+
+<!--
+3' sequence that flanks the
+										variation
+-->
+<!ELEMENT Ss_sequence_seq3 (#PCDATA)>
+
diff --git a/dtd/EMBL_General.dtd b/dtd/EMBL_General.dtd
new file mode 100644
index 0000000..267f9e1
--- /dev/null
+++ b/dtd/EMBL_General.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- EMBL_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
diff --git a/dtd/EMBL_General.mod.dtd b/dtd/EMBL_General.mod.dtd
new file mode 100644
index 0000000..1f6f6fa
--- /dev/null
+++ b/dtd/EMBL_General.mod.dtd
@@ -0,0 +1,133 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "EMBL-General"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+*********************************************************************
+
+ 1990 - J.Ostell
+ Version 3.0 - June 1994
+
+*********************************************************************
+*********************************************************************
+
+  EMBL specific data
+  This block of specifications was developed by Reiner Fuchs of EMBL
+  Updated by J.Ostell, 1994
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          EMBL-dbname,
+          EMBL-xref,
+          EMBL-block -->
+
+<!-- Elements referenced from other modules:
+          Date,
+          Object-id FROM NCBI-General -->
+<!-- ============================================ -->
+
+
+<!ELEMENT EMBL-dbname (
+        EMBL-dbname_code | 
+        EMBL-dbname_name)>
+
+<!ELEMENT EMBL-dbname_code %ENUM;>
+<!ATTLIST EMBL-dbname_code value (
+        embl |
+        genbank |
+        ddbj |
+        geninfo |
+        medline |
+        swissprot |
+        pir |
+        pdb |
+        epd |
+        ecd |
+        tfd |
+        flybase |
+        prosite |
+        enzyme |
+        mim |
+        ecoseq |
+        hiv |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT EMBL-dbname_name (#PCDATA)>
+
+
+<!ELEMENT EMBL-xref (
+        EMBL-xref_dbname, 
+        EMBL-xref_id)>
+
+<!ELEMENT EMBL-xref_dbname (EMBL-dbname)>
+
+<!ELEMENT EMBL-xref_id (Object-id*)>
+
+
+<!ELEMENT EMBL-block (
+        EMBL-block_class?, 
+        EMBL-block_div?, 
+        EMBL-block_creation-date, 
+        EMBL-block_update-date, 
+        EMBL-block_extra-acc?, 
+        EMBL-block_keywords?, 
+        EMBL-block_xref?)>
+
+<!ELEMENT EMBL-block_class %ENUM;>
+<!ATTLIST EMBL-block_class value (
+        not-set |
+        standard |
+        unannotated |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT EMBL-block_div %ENUM;>
+<!ATTLIST EMBL-block_div value (
+        fun |
+        inv |
+        mam |
+        org |
+        phg |
+        pln |
+        pri |
+        pro |
+        rod |
+        syn |
+        una |
+        vrl |
+        vrt |
+        pat |
+        est |
+        sts |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT EMBL-block_creation-date (Date)>
+
+<!ELEMENT EMBL-block_update-date (Date)>
+
+<!ELEMENT EMBL-block_extra-acc (EMBL-block_extra-acc_E*)>
+
+
+<!ELEMENT EMBL-block_extra-acc_E (#PCDATA)>
+
+<!ELEMENT EMBL-block_keywords (EMBL-block_keywords_E*)>
+
+
+<!ELEMENT EMBL-block_keywords_E (#PCDATA)>
+
+<!ELEMENT EMBL-block_xref (EMBL-xref*)>
+
diff --git a/dtd/GenBank_General.dtd b/dtd/GenBank_General.dtd
new file mode 100644
index 0000000..c8707a9
--- /dev/null
+++ b/dtd/GenBank_General.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- GenBank_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
diff --git a/dtd/GenBank_General.mod.dtd b/dtd/GenBank_General.mod.dtd
new file mode 100644
index 0000000..0cba454
--- /dev/null
+++ b/dtd/GenBank_General.mod.dtd
@@ -0,0 +1,65 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "GenBank-General"
+================================================= -->
+
+<!--
+*********************************************************************
+
+  GenBank specific data
+  This block of specifications was developed by Jim Ostell of
+      NCBI
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          GB-block -->
+
+<!-- Elements referenced from other modules:
+          Date FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!-- GenBank specific descriptions -->
+<!ELEMENT GB-block (
+        GB-block_extra-accessions?, 
+        GB-block_source?, 
+        GB-block_keywords?, 
+        GB-block_origin?, 
+        GB-block_date?, 
+        GB-block_entry-date?, 
+        GB-block_div?, 
+        GB-block_taxonomy?)>
+
+<!ELEMENT GB-block_extra-accessions (GB-block_extra-accessions_E*)>
+
+
+<!ELEMENT GB-block_extra-accessions_E (#PCDATA)>
+
+<!-- source line -->
+<!ELEMENT GB-block_source (#PCDATA)>
+
+<!ELEMENT GB-block_keywords (GB-block_keywords_E*)>
+
+
+<!ELEMENT GB-block_keywords_E (#PCDATA)>
+
+<!ELEMENT GB-block_origin (#PCDATA)>
+
+<!-- OBSOLETE old form Entry Date -->
+<!ELEMENT GB-block_date (#PCDATA)>
+
+<!-- replaces date -->
+<!ELEMENT GB-block_entry-date (Date)>
+
+<!-- GenBank division -->
+<!ELEMENT GB-block_div (#PCDATA)>
+
+<!-- continuation line of organism -->
+<!ELEMENT GB-block_taxonomy (#PCDATA)>
+
diff --git a/dtd/HomoloGene.dtd b/dtd/HomoloGene.dtd
new file mode 100644
index 0000000..82262e4
--- /dev/null
+++ b/dtd/HomoloGene.dtd
@@ -0,0 +1,89 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "homologene.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- HomoloGene.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % HomoloGene_module PUBLIC "-//NCBI//HomoloGene Module//EN" "HomoloGene.mod.dtd">
+%HomoloGene_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/HomoloGene.mod.dtd b/dtd/HomoloGene.mod.dtd
new file mode 100644
index 0000000..c88a5cd
--- /dev/null
+++ b/dtd/HomoloGene.mod.dtd
@@ -0,0 +1,293 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "homologene.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "HomoloGene"
+================================================= -->
+
+
+<!-- Elements referenced from other modules:
+          Date FROM NCBI-General,
+          Seq-loc FROM NCBI-Seqloc,
+          Seq-align FROM NCBI-Seqalign -->
+<!-- ============================================ -->
+
+<!--
+ HomoloGeneEntry taxid is the tax id of the group node, which can
+ be the same as the Gene tax id in case of singletons
+-->
+<!ELEMENT HG-EntrySet (
+        HG-EntrySet_entries)>
+
+<!-- homologene entry -->
+<!ELEMENT HG-EntrySet_entries (HG-Entry*)>
+
+
+<!ELEMENT HG-Entry (
+        HG-Entry_hg-id, 
+        HG-Entry_version?, 
+        HG-Entry_title?, 
+        HG-Entry_caption?, 
+        HG-Entry_taxid?, 
+        HG-Entry_genes?, 
+        HG-Entry_cr-date?, 
+        HG-Entry_up-date?, 
+        HG-Entry_distances?, 
+        HG-Entry_commentaries?, 
+        HG-Entry_warnings?, 
+        HG-Entry_node?)>
+
+<!ELEMENT HG-Entry_hg-id (%INTEGER;)>
+
+<!ELEMENT HG-Entry_version (%INTEGER;)>
+
+<!ELEMENT HG-Entry_title (#PCDATA)>
+
+<!ELEMENT HG-Entry_caption (#PCDATA)>
+
+<!ELEMENT HG-Entry_taxid (%INTEGER;)>
+
+<!ELEMENT HG-Entry_genes (HG-Gene*)>
+
+<!ELEMENT HG-Entry_cr-date (Date)>
+
+<!ELEMENT HG-Entry_up-date (Date)>
+
+<!ELEMENT HG-Entry_distances (HG-Stats*)>
+
+<!ELEMENT HG-Entry_commentaries (HG-CommentarySet*)>
+
+<!ELEMENT HG-Entry_warnings (HG-Entry_warnings_E*)>
+
+
+<!ELEMENT HG-Entry_warnings_E (#PCDATA)>
+
+<!ELEMENT HG-Entry_node (HG-Node)>
+
+
+<!ELEMENT HG-Gene (
+        HG-Gene_geneid, 
+        HG-Gene_otherid?, 
+        HG-Gene_symbol?, 
+        HG-Gene_aliases?, 
+        HG-Gene_title, 
+        HG-Gene_taxid, 
+        HG-Gene_prot-gi?, 
+        HG-Gene_prot-acc?, 
+        HG-Gene_prot-len?, 
+        HG-Gene_nuc-gi?, 
+        HG-Gene_nuc-acc?, 
+        HG-Gene_gene-links?, 
+        HG-Gene_prot-links?, 
+        HG-Gene_domains?, 
+        HG-Gene_chr?, 
+        HG-Gene_location?, 
+        HG-Gene_locus-tag?)>
+
+<!ELEMENT HG-Gene_geneid (%INTEGER;)>
+
+<!-- internal use only!!!!! -->
+<!ELEMENT HG-Gene_otherid (%INTEGER;)>
+
+<!ELEMENT HG-Gene_symbol (#PCDATA)>
+
+<!ELEMENT HG-Gene_aliases (HG-Gene_aliases_E*)>
+
+
+<!ELEMENT HG-Gene_aliases_E (#PCDATA)>
+
+<!ELEMENT HG-Gene_title (#PCDATA)>
+
+<!--taxid of gene node -->
+<!ELEMENT HG-Gene_taxid (%INTEGER;)>
+
+<!ELEMENT HG-Gene_prot-gi (%INTEGER;)>
+
+<!ELEMENT HG-Gene_prot-acc (#PCDATA)>
+
+<!ELEMENT HG-Gene_prot-len (%INTEGER;)>
+
+<!ELEMENT HG-Gene_nuc-gi (%INTEGER;)>
+
+<!ELEMENT HG-Gene_nuc-acc (#PCDATA)>
+
+<!ELEMENT HG-Gene_gene-links (HG-Link*)>
+
+<!ELEMENT HG-Gene_prot-links (HG-Link*)>
+
+<!ELEMENT HG-Gene_domains (HG-Domain*)>
+
+<!ELEMENT HG-Gene_chr (#PCDATA)>
+
+<!-- location on the genome -->
+<!ELEMENT HG-Gene_location (Seq-loc)>
+
+<!ELEMENT HG-Gene_locus-tag (#PCDATA)>
+
+
+<!ELEMENT HG-Stats (
+        HG-Stats_gi1, 
+        HG-Stats_gi2, 
+        HG-Stats_nuc-change, 
+        HG-Stats_nuc-change-jc, 
+        HG-Stats_prot-change, 
+        HG-Stats_ka, 
+        HG-Stats_ks, 
+        HG-Stats_knr, 
+        HG-Stats_knc, 
+        HG-Stats_recip-best?)>
+
+<!ELEMENT HG-Stats_gi1 (%INTEGER;)>
+
+<!ELEMENT HG-Stats_gi2 (%INTEGER;)>
+
+<!ELEMENT HG-Stats_nuc-change (%REAL;)>
+
+<!ELEMENT HG-Stats_nuc-change-jc (%REAL;)>
+
+<!ELEMENT HG-Stats_prot-change (%REAL;)>
+
+<!ELEMENT HG-Stats_ka (%REAL;)>
+
+<!ELEMENT HG-Stats_ks (%REAL;)>
+
+<!ELEMENT HG-Stats_knr (%REAL;)>
+
+<!ELEMENT HG-Stats_knc (%REAL;)>
+
+<!ELEMENT HG-Stats_recip-best EMPTY>
+<!ATTLIST HG-Stats_recip-best value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT HG-Commentary (
+        HG-Commentary_link, 
+        HG-Commentary_description?, 
+        HG-Commentary_caption?, 
+        HG-Commentary_provider?, 
+        HG-Commentary_other-links?, 
+        HG-Commentary_other-commentaries?, 
+        HG-Commentary_taxid?, 
+        HG-Commentary_geneid?)>
+
+<!ELEMENT HG-Commentary_link (HG-Link)>
+
+<!-- main description -->
+<!ELEMENT HG-Commentary_description (#PCDATA)>
+
+<!-- extra text -->
+<!ELEMENT HG-Commentary_caption (#PCDATA)>
+
+<!ELEMENT HG-Commentary_provider (#PCDATA)>
+
+<!ELEMENT HG-Commentary_other-links (HG-Link*)>
+
+<!ELEMENT HG-Commentary_other-commentaries (HG-Commentary*)>
+
+<!ELEMENT HG-Commentary_taxid (%INTEGER;)>
+
+<!ELEMENT HG-Commentary_geneid (%INTEGER;)>
+
+
+<!ELEMENT HG-CommentarySet (
+        HG-CommentarySet_hg-id?, 
+        HG-CommentarySet_title, 
+        HG-CommentarySet_commentaries)>
+
+<!ELEMENT HG-CommentarySet_hg-id (%INTEGER;)>
+
+<!ELEMENT HG-CommentarySet_title (#PCDATA)>
+
+<!ELEMENT HG-CommentarySet_commentaries (HG-Commentary*)>
+
+
+<!ELEMENT HG-CommentaryContainer (HG-CommentarySet*)>
+
+
+<!ELEMENT HG-Link (
+        HG-Link_hypertext, 
+        HG-Link_url?)>
+
+<!ELEMENT HG-Link_hypertext (#PCDATA)>
+
+<!ELEMENT HG-Link_url (#PCDATA)>
+
+
+<!ELEMENT HG-Domain (
+        HG-Domain_begin, 
+        HG-Domain_end, 
+        HG-Domain_pssm-id?, 
+        HG-Domain_cdd-id?, 
+        HG-Domain_cdd-name?)>
+
+<!ELEMENT HG-Domain_begin (%INTEGER;)>
+
+<!ELEMENT HG-Domain_end (%INTEGER;)>
+
+<!-- entrez uid -->
+<!ELEMENT HG-Domain_pssm-id (%INTEGER;)>
+
+<!ELEMENT HG-Domain_cdd-id (#PCDATA)>
+
+<!ELEMENT HG-Domain_cdd-name (#PCDATA)>
+
+
+<!ELEMENT HG-Node (
+        HG-Node_type, 
+        HG-Node_id, 
+        HG-Node_caption?, 
+        HG-Node_current-node?, 
+        HG-Node_children?, 
+        HG-Node_branch-len?)>
+
+<!ELEMENT HG-Node_type %ENUM;>
+<!ATTLIST HG-Node_type value (
+        family |
+        ortholog |
+        paralog |
+        leaf
+        ) #REQUIRED >
+
+
+<!ELEMENT HG-Node_id (HG-Node-id)>
+
+<!ELEMENT HG-Node_caption (#PCDATA)>
+
+<!ELEMENT HG-Node_current-node EMPTY>
+<!ATTLIST HG-Node_current-node value ( true | false ) "false" >
+
+
+<!ELEMENT HG-Node_children (HG-Node*)>
+
+<!ELEMENT HG-Node_branch-len (%INTEGER;)>
+
+
+<!ELEMENT HG-Node-id (
+        HG-Node-id_id?, 
+        HG-Node-id_id-type)>
+
+<!ELEMENT HG-Node-id_id (%INTEGER;)>
+
+<!ELEMENT HG-Node-id_id-type %ENUM;>
+<!ATTLIST HG-Node-id_id-type value (
+        none |
+        geneid |
+        hid
+        ) #REQUIRED >
+
+
+
+<!ELEMENT HG-Alignment (
+        HG-Alignment_hg-id, 
+        HG-Alignment_alignment)>
+
+<!ELEMENT HG-Alignment_hg-id (%INTEGER;)>
+
+<!ELEMENT HG-Alignment_alignment (Seq-align)>
+
+
+<!ELEMENT HG-AlignmentSet (HG-Alignment*)>
+
diff --git a/dtd/INSD_INSDSeq.dtd b/dtd/INSD_INSDSeq.dtd
new file mode 100644
index 0000000..fdf3b96
--- /dev/null
+++ b/dtd/INSD_INSDSeq.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "insdseq.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- INSD_INSDSeq.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % INSD_INSDSeq_module PUBLIC "-//NCBI//INSD INSDSeq Module//EN" "INSD_INSDSeq.mod.dtd">
+%INSD_INSDSeq_module;
diff --git a/dtd/INSD_INSDSeq.mod.dtd b/dtd/INSD_INSDSeq.mod.dtd
new file mode 100644
index 0000000..308423d
--- /dev/null
+++ b/dtd/INSD_INSDSeq.mod.dtd
@@ -0,0 +1,491 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "insdseq.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "INSD-INSDSeq"
+================================================= -->
+
+<!--
+$Revision: 192674 $
+************************************************************************
+
+ ASN.1 and XML for the components of a GenBank/EMBL/DDBJ sequence record
+ The International Nucleotide Sequence Database (INSD) collaboration
+ Version 1.6, 25 May 2010
+
+************************************************************************
+-->
+
+<!--
+  INSDSeq provides the elements of a sequence as presented in the
+    GenBank/EMBL/DDBJ-style flatfile formats, with a small amount of
+    additional structure.
+    Although this single perspective of the three flatfile formats
+    provides a useful simplification, it hides to some extent the
+    details of the actual data underlying those formats. Nevertheless,
+    the XML version of INSD-Seq is being provided with
+    the hopes that it will prove useful to those who bulk-process
+    sequence data at the flatfile-format level of detail. Further 
+    documentation regarding the content and conventions of those formats 
+    can be found at:
+
+    URLs for the DDBJ, EMBL, and GenBank Feature Table Document:
+    http://www.ddbj.nig.ac.jp/FT/full_index.html
+    http://www.ebi.ac.uk/embl/Documentation/FT_definitions/feature_table.html
+    http://www.ncbi.nlm.nih.gov/projects/collab/FT/index.html
+
+    URLs for DDBJ, EMBL, and GenBank Release Notes :
+    ftp://ftp.ddbj.nig.ac.jp/database/ddbj/ddbjrel.txt
+    http://www.ebi.ac.uk/embl/Documentation/Release_notes/current/relnotes.html
+    ftp://ftp.ncbi.nih.gov/genbank/gbrel.txt
+
+    Because INSDSeq is a compromise, a number of pragmatic decisions have
+    been made:
+
+  In pursuit of simplicity and familiarity a number of fields do not
+    have full substructure defined here where there is already a
+    standard flatfile format string. For example:
+
+   Dates:      DD-MON-YYYY (eg 10-JUN-2003)
+
+   Author:     LastName, Initials  (eg Smith, J.N.)
+            or Lastname Initials   (eg Smith J.N.)
+
+   Journal:    JournalName Volume (issue), page-range (year)
+            or JournalName Volume(issue):page-range(year)
+            eg Appl. Environ. Microbiol. 61 (4), 1646-1648 (1995)
+               Appl. Environ. Microbiol. 61(4):1646-1648(1995).
+
+  FeatureLocations are representated as in the flatfile feature table,
+    but FeatureIntervals may also be provided as a convenience
+
+  FeatureQualifiers are represented as in the flatfile feature table.
+
+  Primary has a string that represents a table to construct
+    a third party (TPA) sequence.
+
+  other-seqids can have strings with the "vertical bar format" sequence
+    identifiers used in BLAST for example, when they are non-INSD types.
+
+  Currently in flatfile format you only see Accession numbers, but there 
+    are others, like patents, submitter clone names, etc which will 
+    appear here
+
+  There are also a number of elements that could have been more exactly
+    specified, but in the interest of simplicity have been simply left as
+    optional. For example:
+
+  All publicly accessible sequence records in INSDSeq format will
+    include accession and accession.version. However, these elements are 
+    optional in optional in INSDSeq so that this format can also be used   
+    for non-public sequence data, prior to the assignment of accessions and 
+    version numbers. In such cases, records will have only "other-seqids".
+
+  sequences will normally all have "sequence" filled in. But contig records
+    will have a "join" statement in the "contig" slot, and no "sequence".
+    We also may consider a retrieval option with no sequence of any kind
+    and no feature table to quickly check minimal values.
+
+  Four (optional) elements are specific to records represented via the EMBL
+    sequence database: INSDSeq_update-release, INSDSeq_create-release,
+    INSDSeq_entry-version, and INSDSeq_database-reference.
+
+  One (optional) element is specific to records originating at the GenBank
+    and DDBJ sequence databases: INSDSeq_segment.
+
+********
+-->
+<!ELEMENT INSDSet (INSDSeq*)>
+
+
+<!ELEMENT INSDSeq (
+        INSDSeq_locus, 
+        INSDSeq_length, 
+        INSDSeq_strandedness?, 
+        INSDSeq_moltype, 
+        INSDSeq_topology?, 
+        INSDSeq_division, 
+        INSDSeq_update-date, 
+        INSDSeq_create-date?, 
+        INSDSeq_update-release?, 
+        INSDSeq_create-release?, 
+        INSDSeq_definition, 
+        INSDSeq_primary-accession?, 
+        INSDSeq_entry-version?, 
+        INSDSeq_accession-version?, 
+        INSDSeq_other-seqids?, 
+        INSDSeq_secondary-accessions?, 
+        INSDSeq_project?, 
+        INSDSeq_keywords?, 
+        INSDSeq_segment?, 
+        INSDSeq_source?, 
+        INSDSeq_organism?, 
+        INSDSeq_taxonomy?, 
+        INSDSeq_references?, 
+        INSDSeq_comment?, 
+        INSDSeq_comment-set?, 
+        INSDSeq_struc-comments?, 
+        INSDSeq_primary?, 
+        INSDSeq_source-db?, 
+        INSDSeq_database-reference?, 
+        INSDSeq_feature-table?, 
+        INSDSeq_feature-set?, 
+        INSDSeq_sequence?, 
+        INSDSeq_contig?, 
+        INSDSeq_alt-seq?)>
+
+<!ELEMENT INSDSeq_locus (#PCDATA)>
+
+<!ELEMENT INSDSeq_length (%INTEGER;)>
+
+<!ELEMENT INSDSeq_strandedness (#PCDATA)>
+
+<!ELEMENT INSDSeq_moltype (#PCDATA)>
+
+<!ELEMENT INSDSeq_topology (#PCDATA)>
+
+<!ELEMENT INSDSeq_division (#PCDATA)>
+
+<!ELEMENT INSDSeq_update-date (#PCDATA)>
+
+<!ELEMENT INSDSeq_create-date (#PCDATA)>
+
+<!ELEMENT INSDSeq_update-release (#PCDATA)>
+
+<!ELEMENT INSDSeq_create-release (#PCDATA)>
+
+<!ELEMENT INSDSeq_definition (#PCDATA)>
+
+<!ELEMENT INSDSeq_primary-accession (#PCDATA)>
+
+<!ELEMENT INSDSeq_entry-version (#PCDATA)>
+
+<!ELEMENT INSDSeq_accession-version (#PCDATA)>
+
+<!ELEMENT INSDSeq_other-seqids (INSDSeqid*)>
+
+<!ELEMENT INSDSeq_secondary-accessions (INSDSecondary-accn*)>
+
+<!ELEMENT INSDSeq_project (#PCDATA)>
+
+<!ELEMENT INSDSeq_keywords (INSDKeyword*)>
+
+<!ELEMENT INSDSeq_segment (#PCDATA)>
+
+<!ELEMENT INSDSeq_source (#PCDATA)>
+
+<!ELEMENT INSDSeq_organism (#PCDATA)>
+
+<!ELEMENT INSDSeq_taxonomy (#PCDATA)>
+
+<!ELEMENT INSDSeq_references (INSDReference*)>
+
+<!ELEMENT INSDSeq_comment (#PCDATA)>
+
+<!ELEMENT INSDSeq_comment-set (INSDComment*)>
+
+<!ELEMENT INSDSeq_struc-comments (INSDStrucComment*)>
+
+<!ELEMENT INSDSeq_primary (#PCDATA)>
+
+<!ELEMENT INSDSeq_source-db (#PCDATA)>
+
+<!ELEMENT INSDSeq_database-reference (#PCDATA)>
+
+<!ELEMENT INSDSeq_feature-table (INSDFeature*)>
+
+<!ELEMENT INSDSeq_feature-set (INSDFeatureSet*)>
+
+<!-- Optional for contig, wgs, etc. -->
+<!ELEMENT INSDSeq_sequence (#PCDATA)>
+
+<!ELEMENT INSDSeq_contig (#PCDATA)>
+
+<!ELEMENT INSDSeq_alt-seq (INSDAltSeqData*)>
+
+
+<!ELEMENT INSDSeqid (#PCDATA)>
+
+
+<!ELEMENT INSDSecondary-accn (#PCDATA)>
+
+
+<!ELEMENT INSDKeyword (#PCDATA)>
+
+<!--
+ INSDReference_position contains a string value indicating the
+ basepair span(s) to which a reference applies. The allowable
+ formats are:
+ 
+   X..Y  : Where X and Y are integers separated by two periods,
+           X >= 1 , Y <= sequence length, and X <= Y 
+
+           Multiple basepair spans can exist, separated by a
+           semi-colon and a space. For example : 10..20; 100..500
+             
+   sites : The string literal 'sites', indicating that a reference
+           provides sequence annotation information, but the specific
+           basepair spans are either not captured, or were too numerous
+           to record.
+ 
+           The 'sites' literal string is singly occuring, and
+            cannot be used in conjunction with any X..Y basepair spans.
+ 
+   References that lack an INSDReference_position element apply
+   to the entire sequence.
+-->
+<!ELEMENT INSDReference (
+        INSDReference_reference, 
+        INSDReference_position?, 
+        INSDReference_authors?, 
+        INSDReference_consortium?, 
+        INSDReference_title?, 
+        INSDReference_journal, 
+        INSDReference_xref?, 
+        INSDReference_pubmed?, 
+        INSDReference_remark?)>
+
+<!ELEMENT INSDReference_reference (#PCDATA)>
+
+<!ELEMENT INSDReference_position (#PCDATA)>
+
+<!ELEMENT INSDReference_authors (INSDAuthor*)>
+
+<!ELEMENT INSDReference_consortium (#PCDATA)>
+
+<!ELEMENT INSDReference_title (#PCDATA)>
+
+<!ELEMENT INSDReference_journal (#PCDATA)>
+
+<!ELEMENT INSDReference_xref (INSDXref*)>
+
+<!ELEMENT INSDReference_pubmed (%INTEGER;)>
+
+<!ELEMENT INSDReference_remark (#PCDATA)>
+
+
+<!ELEMENT INSDAuthor (#PCDATA)>
+
+<!--
+ INSDXref provides a method for referring to records in
+ other databases. INSDXref_dbname is a string value that
+ provides the name of the database, and INSDXref_dbname
+ is a string value that provides the record's identifier
+ in that database.
+-->
+<!ELEMENT INSDXref (
+        INSDXref_dbname, 
+        INSDXref_id)>
+
+<!ELEMENT INSDXref_dbname (#PCDATA)>
+
+<!ELEMENT INSDXref_id (#PCDATA)>
+
+
+<!ELEMENT INSDComment (
+        INSDComment_type?, 
+        INSDComment_paragraphs)>
+
+<!ELEMENT INSDComment_type (#PCDATA)>
+
+<!ELEMENT INSDComment_paragraphs (INSDCommentParagraph*)>
+
+
+<!ELEMENT INSDCommentParagraph (
+        INSDCommentParagraph_items)>
+
+<!ELEMENT INSDCommentParagraph_items (INSDCommentItem*)>
+
+
+<!ELEMENT INSDCommentItem (
+        INSDCommentItem_value?, 
+        INSDCommentItem_url?)>
+
+<!ELEMENT INSDCommentItem_value (#PCDATA)>
+
+<!ELEMENT INSDCommentItem_url (#PCDATA)>
+
+
+<!ELEMENT INSDStrucComment (
+        INSDStrucComment_name?, 
+        INSDStrucComment_items)>
+
+<!ELEMENT INSDStrucComment_name (#PCDATA)>
+
+<!ELEMENT INSDStrucComment_items (INSDStrucCommentItem*)>
+
+
+<!ELEMENT INSDStrucCommentItem (
+        INSDStrucCommentItem_tag?, 
+        INSDStrucCommentItem_value?, 
+        INSDStrucCommentItem_url?)>
+
+<!ELEMENT INSDStrucCommentItem_tag (#PCDATA)>
+
+<!ELEMENT INSDStrucCommentItem_value (#PCDATA)>
+
+<!ELEMENT INSDStrucCommentItem_url (#PCDATA)>
+
+<!--
+ INSDFeature_operator contains a string value describing
+ the relationship among a set of INSDInterval within
+ INSDFeature_intervals. The allowable formats are:
+ 
+   join :  The string literal 'join' indicates that the
+           INSDInterval intervals are biologically joined
+           together into a contiguous molecule.
+ 
+   order : The string literal 'order' indicates that the
+           INSDInterval intervals are in the presented
+           order, but they are not necessarily contiguous.
+ 
+   Either 'join' or 'order' is required if INSDFeature_intervals
+   is comprised of more than one INSDInterval .
+-->
+<!ELEMENT INSDFeatureSet (
+        INSDFeatureSet_annot-source?, 
+        INSDFeatureSet_features)>
+
+<!ELEMENT INSDFeatureSet_annot-source (#PCDATA)>
+
+<!ELEMENT INSDFeatureSet_features (INSDFeature*)>
+
+
+<!ELEMENT INSDFeature (
+        INSDFeature_key, 
+        INSDFeature_location, 
+        INSDFeature_intervals?, 
+        INSDFeature_operator?, 
+        INSDFeature_partial5?, 
+        INSDFeature_partial3?, 
+        INSDFeature_quals?, 
+        INSDFeature_xrefs?)>
+
+<!ELEMENT INSDFeature_key (#PCDATA)>
+
+<!ELEMENT INSDFeature_location (#PCDATA)>
+
+<!ELEMENT INSDFeature_intervals (INSDInterval*)>
+
+<!ELEMENT INSDFeature_operator (#PCDATA)>
+
+<!ELEMENT INSDFeature_partial5 EMPTY>
+<!ATTLIST INSDFeature_partial5 value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT INSDFeature_partial3 EMPTY>
+<!ATTLIST INSDFeature_partial3 value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT INSDFeature_quals (INSDQualifier*)>
+
+<!ELEMENT INSDFeature_xrefs (INSDXref*)>
+
+<!--
+ INSDInterval_iscomp is a boolean indicating whether
+ an INSDInterval_from / INSDInterval_to location
+ represents a location on the complement strand.
+ When INSDInterval_iscomp is TRUE, it essentially
+ confirms that a 'from' value which is greater than
+ a 'to' value is intentional, because the location
+ is on the opposite strand of the presented sequence.
+ INSDInterval_interbp is a boolean indicating whether
+ a feature (such as a restriction site) is located
+ between two adjacent basepairs. When INSDInterval_iscomp
+ is TRUE, the 'from' and 'to' values must differ by
+ exactly one base.
+-->
+<!ELEMENT INSDInterval (
+        INSDInterval_from?, 
+        INSDInterval_to?, 
+        INSDInterval_point?, 
+        INSDInterval_iscomp?, 
+        INSDInterval_interbp?, 
+        INSDInterval_accession)>
+
+<!ELEMENT INSDInterval_from (%INTEGER;)>
+
+<!ELEMENT INSDInterval_to (%INTEGER;)>
+
+<!ELEMENT INSDInterval_point (%INTEGER;)>
+
+<!ELEMENT INSDInterval_iscomp EMPTY>
+<!ATTLIST INSDInterval_iscomp value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT INSDInterval_interbp EMPTY>
+<!ATTLIST INSDInterval_interbp value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT INSDInterval_accession (#PCDATA)>
+
+
+<!ELEMENT INSDQualifier (
+        INSDQualifier_name, 
+        INSDQualifier_value?)>
+
+<!ELEMENT INSDQualifier_name (#PCDATA)>
+
+<!ELEMENT INSDQualifier_value (#PCDATA)>
+
+
+<!ELEMENT INSDAltSeqData (
+        INSDAltSeqData_name, 
+        INSDAltSeqData_items?)>
+
+<!--
+ e.g., CON-division-join, WGS-contig-range,
+ WGS-scaffold-range, MGA/CAGE-range, genome
+-->
+<!ELEMENT INSDAltSeqData_name (#PCDATA)>
+
+<!ELEMENT INSDAltSeqData_items (INSDAltSeqItem*)>
+
+
+<!ELEMENT INSDAltSeqItem (
+        INSDAltSeqItem_interval?, 
+        INSDAltSeqItem_isgap?, 
+        INSDAltSeqItem_gap-length?, 
+        INSDAltSeqItem_gap-type?, 
+        INSDAltSeqItem_gap-linkage?, 
+        INSDAltSeqItem_gap-comment?, 
+        INSDAltSeqItem_first-accn?, 
+        INSDAltSeqItem_last-accn?, 
+        INSDAltSeqItem_value?)>
+<!--
+ INSDInterval_iscomp is a boolean indicating whether
+ an INSDInterval_from / INSDInterval_to location
+ represents a location on the complement strand.
+ When INSDInterval_iscomp is TRUE, it essentially
+ confirms that a 'from' value which is greater than
+ a 'to' value is intentional, because the location
+ is on the opposite strand of the presented sequence.
+ INSDInterval_interbp is a boolean indicating whether
+ a feature (such as a restriction site) is located
+ between two adjacent basepairs. When INSDInterval_iscomp
+ is TRUE, the 'from' and 'to' values must differ by
+ exactly one base.
+-->
+<!ELEMENT INSDAltSeqItem_interval (INSDInterval)>
+
+<!ELEMENT INSDAltSeqItem_isgap EMPTY>
+<!ATTLIST INSDAltSeqItem_isgap value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT INSDAltSeqItem_gap-length (%INTEGER;)>
+
+<!ELEMENT INSDAltSeqItem_gap-type (#PCDATA)>
+
+<!ELEMENT INSDAltSeqItem_gap-linkage (#PCDATA)>
+
+<!ELEMENT INSDAltSeqItem_gap-comment (#PCDATA)>
+
+<!ELEMENT INSDAltSeqItem_first-accn (#PCDATA)>
+
+<!ELEMENT INSDAltSeqItem_last-accn (#PCDATA)>
+
+<!ELEMENT INSDAltSeqItem_value (#PCDATA)>
+
diff --git a/dtd/JATS-XHTMLtablesetup1-3.ent b/dtd/JATS-XHTMLtablesetup1-3.ent
new file mode 100644
index 0000000..a20dee5
--- /dev/null
+++ b/dtd/JATS-XHTMLtablesetup1-3.ent
@@ -0,0 +1,629 @@
+<!-- ============================================================= -->
+<!--  MODULE:    XHTML Table Setup Module                          -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          --> 
+<!--  DATE:      June 2021                                         --> 
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite XHTML Table Setup Module v1.3 20210610//EN"
+     Delivered as file "JATS-XHTMLtablesetup1-3.ent"               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Provides the organization for using the XHTML 1.1 -->
+<!--             table model                                       -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Invokes the inline style attribute module      -->
+<!--                  to pick up the "style" attribute             -->
+<!--             2) Overrides to standard parameter entities used  -->
+<!--                in the XHTML 1.1 table model                   -->
+<!--             3) Invokes the XHTML 1.1 table model              -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             1) XHTML inline style module                      -->
+<!--                  (-%xhtml-inlstyle-1.mod;)                    -->
+<!--             2) XHTML 1.1 table model (-%xhtml-table-1.mod;)   -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 23. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 22. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 21. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 20. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 19. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 18. BITS remains "2.0" and "v2.0 20151225"
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 17. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+ 16. JATS became version "1.2d1" and "v1.2d1 20170631"
+ 
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 15. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+     
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 14. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 13. TABLE ATTRIBUTES
+     - Added @specific-use to the attributes for <table>,
+       primarily for use when <table> is used inside <alternatives>.
+     - This entailed creating a new PE "additional-table-atts",
+       which is defined and called AFTER the full table setup,
+       so that XML tools that do not recognize a 2nd ATTLIST for
+       an element will lose only the @specific-use. This new PE
+       could also be sued to add other attributes to an XHTML-
+       inspired <table>.
+
+ 12. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1d2/
+
+ 11. CAPTION ATTRIBUTES - This module has been changed to alter
+      the mechanism by which the @style attribute is associated 
+      with the element <caption>. 
+          Previously, the <caption> element's base attributes  
+      were declared in the JATS-display.ent module and additional 
+      attributes (in the published XHTML, only @style) for it 
+      were declared in the XHTML Table Module. The @style 
+      attribute is now declared with all the other <caption>
+      attributes in the  JATS-display.ent module, and the caption 
+      attributes in the XHTML table model have been set to IGNORE. 
+      This was done to prevent duplicate (harmless but annoying)
+      attribute warning messages. 
+                        
+           CAUTION: If your XHTML customization has added attributes
+                    by redefining the parameter entity 
+                            "Core.extra.attrib"
+                    you will need to uncomment the lines in this
+                    module that add that parameter entity to the
+                    contents of the <caption> attribute list.
+                    Otherwise, your new attributes will not be
+                    added to <caption>. When you uncomment this
+                    line, you will get a duplicative attribute
+                    warning message on the @style attribute,
+                    which you may ignore.  
+                    
+ 10. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added an attribute list to the parameter entity 
+     "Common.attrib".
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  5. OASIS NAMESPACE - Added the OASIS table namespace handling,
+     which, by default, places a namespace prefix of "oasis" on
+     the OASIS CALS Exchange Table Model.
+      - Added call to JATS-oasis-namespace.ent (which sets up
+          the OASIS namespace URI and the prefix "oasis")
+      - Added  %oasis.xmlns.attrib; attribute to <article>
+      - Altered the custom classes module to use the new
+         namespaced OASIS element names for <table> and <tbody>
+         (%otable.qname; and %otbody.qname;)
+     NOTE: The XHTML table material was not removed, so both table
+     models still work (using <table> and <oasis:table> respectively.
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            --> 
+
+<!-- ============================================================= -->
+<!--                    SET UP FOR THE XHTML 1.1 TABLE MODULE      -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    THE XHTML TABLE STYLE ATTRIBUTE MODULE     -->
+<!-- ============================================================= -->
+
+
+<!--                    XHTML TABLE INLINE STYLE MODULE            -->
+<!--                    This module declares the 'style' attribute,
+                        used to support inline style markup for the
+                        <td> and <tr> elements. Copyright 1998-2005
+                        W3C (MIT, ERCIM, Keio), All Rights Reserved.
+                        Revision: $Id: xhtml-inlstyle-1.mod,v 4.0
+                        2001/04/02 22:42:49 altheim Exp $
+                        PUBLIC identifier
+                        "-//W3C//ENTITIES XHTML Inline Style 1.0//EN"
+                        SYSTEM identifier
+                "http://www.w3.org/MarkUp/DTD/xhtml-inlstyle-1.mod"-->
+%xhtml-inlstyle-1.mod;
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR TABLE ELEMENT NAMES           -->
+<!-- ============================================================= -->
+
+
+<!ENTITY % table.qname  "table"                                      >
+<!ENTITY % caption.qname
+                        "caption"                                    >
+<!ENTITY % thead.qname  "thead"                                      >
+<!ENTITY % tfoot.qname  "tfoot"                                      >
+<!ENTITY % tbody.qname  "tbody"                                      >
+<!ENTITY % colgroup.qname
+                        "colgroup"                                   >
+<!ENTITY % col.qname    "col"                                        >
+<!ENTITY % tr.qname     "tr"                                         >
+<!ENTITY % th.qname     "th"                                         >
+<!ENTITY % td.qname     "td"                                         >
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR DATATYPE PARAMETER ENTITIES   -->
+<!-- ============================================================= -->
+
+
+<!ENTITY % Text.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Number.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % MultiLength.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Length.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Pixels.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Character.datatype
+                        "CDATA"                                      >
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE PARAMETER ENTITIES  -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON ATTRIBUTES (used all over)          -->
+<!--         style      Defined in the PE -%Core.extra.attrib; and
+                        used to support inline style markup. This
+                        attribute is defined in the XHTML Table
+                        Inline Style Module called in with the PE:
+                           -%xhtml-inlstyle-1.mod
+                        which must be invoked before the attribute
+                        PE is used. 
+                        Warning: The definitions below will lead to
+                        the element <caption> having the attributes
+                        @id and @content-type defined twice. This is
+                        just a validity warning, not an error and 
+                        should be ignored.                         -->
+<!ENTITY % Common.attrib
+            "%jats-common-atts;
+             content-type
+                        CDATA                             #IMPLIED
+             %Core.extra.attrib;"                                    >
+
+
+<!-- ============================================================= -->
+<!--                    OVER-RIDES TO REMOVE CAPTION               -->
+<!-- ============================================================= -->
+
+
+<!--                   CAPTION FOR A TABLE                         -->
+<!--                   Modification of the standard XHMTL model
+                       Removed the definition of caption, so the
+                       element would not be multiply defined       -->
+<!ENTITY % caption.element
+                       "IGNORE"                                      >
+
+
+<!ENTITY % caption.attlist  
+                       "IGNORE"                                      >
+
+
+<!--                    CAPTION ATTRIBUTES                         -->
+<!--                    Attributes for <caption> element           -->
+<!--                    In the lines directly above this declaration,
+                        the attribute list for caption, as defined
+                        in the XHTML Table Model, has been removed
+                        using the IGNORE mechanism. This was done 
+                        to prevent duplicate (harmless but annoying)
+                        attribute warning messages. 
+                        
+                        CAUTION: If your XHTML customization has
+                        redefined the parameter entity 
+                                   "Core.extra.attrib"
+                        you will need to uncomment the lines
+                        below. You will get a duplicative attribute
+                        warning message on the @style attribute,
+                        which you may ignore.                      -->
+<!--
+<!ENTITY % caption-atts
+                        "%Core.extra.attrib;                         >
+-->
+            
+            
+<!-- ============================================================= -->
+<!--                    OVER-RIDES FOR CONTENT PARAMETER ENTITIES  -->
+<!-- ============================================================= -->
+
+
+<!--                   INLINE ELEMENTS                             -->
+<!--                   Modification of the standard XHMTL model
+                       for inline elements used in the <caption>
+                       Set to the null because the <caption>
+                       element is now inside the table wrapper,
+                       not inside the table, as the original XHTML
+                       table intended                              -->
+<!ENTITY % Inline.mix  ""                                            >
+
+
+<!--                   CONTENTS OF A TABLE CELL                    -->
+<!--                   Modification of the standard XHMTL model
+                       used for the content of tables cells <th>
+                       and <td>                                    -->
+<!ENTITY % Flow.mix    "%inside-cell;"                               >
+
+
+<!--                   CONTENTS OF A TABLE                         -->
+<!--                   Modification of the standard XHMTL model
+                       This has been modified from the XHTML model
+                       to remove the <caption> element from the
+                       <table> model, since in the JATS DTD Suite 
+                       modular library, the <caption> element is part  
+                       of the Table Wrapper <table-wrap> element. 
+                       No other changes were made to the XHTML table 
+                       content model.                              -->
+<!ENTITY % table.content
+     "( ( %col.qname;* | %colgroup.qname;* ),
+        ( ( %thead.qname;?, %tfoot.qname;?, %tbody.qname;+ ) |
+          ( %tr.qname;+ )
+        )
+      )"                                                             >
+
+
+<!-- ============================================================= -->
+<!--                    THE XHTML V1.1 TABLE INVOCATION            -->
+<!-- ============================================================= -->
+
+
+<!--                    XHTML TABLE MODEL                          -->
+<!--                    This module declares element types and
+                        attributes used to provide table markup
+                        similar to HTML 4, including features that
+                        enable better accessibility for non-visual
+                        user agents. This is the XHTML reformulation
+                        of HTML as a modular XML application.
+                        Copyright 1998-2005 W3C (MIT, ERCIM, Keio),
+                        All Rights Reserved.
+                        Revision: $Id: xhtml-table-1.mod,v 4.1
+                        2001/04/10 09:42:30 altheim Exp $ SMI
+                        PUBLIC identifier
+                        "-//W3C//ELEMENTS XHTML Tables 1.0//EN"
+                        SYSTEM identifier:
+                  "http://www.w3.org/MarkUp/DTD/xhtml-table-1.mod" -->
+%xhtml-table-1.mod;
+
+<!-- ============================================================= -->
+<!--                    ADDITIONAL ATTRIBUTE(S) FOR TABLE          -->
+<!-- ============================================================= -->
+
+<!ENTITY % additional-table-atts
+            "specific-use 
+                        CDATA                              #IMPLIED" >
+
+<!ATTLIST %table.qname;
+            %additional-table-atts;                                  >
+
+<!-- ================== End XHTML Table Setup Module ============= -->
diff --git a/dtd/JATS-ali-namespace1-3.ent b/dtd/JATS-ali-namespace1-3.ent
new file mode 100644
index 0000000..6439068
--- /dev/null
+++ b/dtd/JATS-ali-namespace1-3.ent
@@ -0,0 +1,293 @@
+<!-- ============================================================= -->
+<!--  MODULE:    ALI Namespace Module (NISO RP-22-2015)            -->
+<!--             NISO Access License and Indicators (ALI)          -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS ALI Namespace Module v1.3 20210610//EN"
+     Delivered as file "JATS-ali-namespace1-3.ent"                 -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Establish the prefix for the NISO Access and      -->
+<!--             Indicators elements (prefix "ali:").              -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             February 2015                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Publishing DTD is built from the      -->
+<!--             Journal Archiving and Interchange DTD Suite.      -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+  9. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+  8. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  7. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+  6. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                    (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+  5. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+  4. BITS "2.0" and "v2.0 20151225" remained unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed. 
+
+   =============================================================
+     JATS Version 1.2d2 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d2  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  3. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d2" and "v1.2d2 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+  2. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  1. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained "2.0" and became "v2.0 20151225" 
+     
+     =============================================================
+
+     Details concerning ANSI/NISO Z39.96-2019 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3/
+                                                                   -->
+<!-- ============================================================= -->
+<!--                    ALI NAMESPACE SETUP                        -->
+<!-- ============================================================= -->
+
+
+<!--                    NAME ALI NAMESPACE BASE URI                -->
+<!--                    Set the ALI namespace URI,as named in
+                        NISO RP-22-2015                            -->
+<!ENTITY % ali.xmlns   
+      "http://www.niso.org/schemas/ali/1.0/"                         >
+
+
+<!--                    NAME ALI NAMESPACE PREFIX                  -->
+<!--                    Set the namespace prefix for the ALI
+                        elements to the JATS-named prefix "ali". 
+                        Implementor's Note: This parameter entity
+                        should always be set, even if you need to turn
+                        off the namespace prefix.                  -->
+<!ENTITY % ali.prefix   "ali"                                        >
+
+
+<!--                    NAME OASIS NAMESPACE PREFIX                -->
+<!--                    Construct the ALI namespace prefix to be 
+                        used in the xmlns pseudo-attribute from:
+                          - the word "xmlns", 
+                          - a colon, and 
+                          - the prefix just defined in %ali.prefix;
+                                                                   -->
+<!ENTITY % ali.xmlns.attrname
+                        "xmlns:%ali.prefix;"                         >
+
+
+<!--                    DEFAULT ALI NAMESPACE                       -->
+<!--                    The default namespace to be used when
+                        calling in the ALI elements. This is set on 
+                        the article level as well as on the ALI
+                        elements themselves.
+                        Implementor's Note: The parameter entity is
+                        constructed from the parameter entities set 
+                        above.                                     -->
+<!ENTITY % ali.xmlns.attrib
+     "%ali.xmlns.attrname; 
+                        CDATA               #FIXED '%ali.xmlns;'"    >
+
+
+<!-- ================== End ALI Namespace Setup  ================= -->
\ No newline at end of file
diff --git a/dtd/JATS-archivearticle1-3-mathml3.dtd b/dtd/JATS-archivearticle1-3-mathml3.dtd
new file mode 100644
index 0000000..cabf4d0
--- /dev/null
+++ b/dtd/JATS-archivearticle1-3-mathml3.dtd
@@ -0,0 +1,1101 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving and Interchange DTD (MathML 3.0)-->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD with MathML3 v1.3 20210610//EN"
+     Delivered as file "JATS-archivearticle1-3-mathml3.dtd"
+     Available at:
+     http://jats.nlm.nih.gov/archiving/1.3/JATS-archivearticle1-3.dtd
+                                                                   -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      --> 
+<!--             JATS DTD Suite                                    -->         
+<!--                                                               -->
+<!-- PURPOSE:    DTD to describe a full-text journal article       -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is an   -->
+<!--             application of the ANSI/NISO Z39.96 JATS Journal  -->
+<!--             Article Tag Set. It describes journal articles    -->
+<!--             and some non-article material such as product     -->
+<!--             and book reviews for repository or interchange    -->
+<!--             purposes. It describes both the metadata for a    -->
+<!--             journal article and the  full content of          -->
+<!--             the article.                                      -->
+<!--                                                               -->
+<!--             This DTD was constructed using the modules in the -->
+<!--             JATS DTD Suite, using almost no customization.    -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created from the JATS DTD Suite.     -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is      -->
+<!--             built from the JATS DTD Suite.                    -->
+<!--                                                               -->
+<!--             This DTD and the Suite are a continuation of      -->
+<!--             the work done by NCBI, Mulberry Technologies,     -->
+<!--             and Inera Inc. on the NLM Journal Archiving       -->
+<!--             and Interchange DTD Suite, which was originally   -->
+<!--             released in December, 2002.                       -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 41. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+         
+ 40. PROCESSING METADATA - A new container element was added as
+     a child of <article>, <sub-article>, and <response> to 
+     describe processing information to help determine the 
+     exact tagset flavor used by this document instance. 
+     (<processing-meta>)
+     Current contents of <processing-meta>:
+      - <restricted-by> - Names tighter schemas, subsets, or
+           Guidelines followed by this document.
+      - <extended-by> - Names extension or superset schemas
+           followed by this document, such as TaxPub.
+      - <custom-meta-group>
+     Several new attributes were added to describe more 
+     completely the flavor/version of JATS in which the 
+     document was composed:
+       - @tagset-family	(JATS | BITS | STS)
+       - @base-tagset   (Archiving | Publishing | Authoring)
+       - @table-model	(XHTML |OASIS-CALS | both | none)
+       - @mathml		(MathML 2.0 | MathML 3.0)
+       - @dtd-version was also revised (see below)
+
+ 39. DTD VERSION - The <article> attribute @dtd-version has been
+     a #FIXED attribute for all of JATS history. This is very
+     convenient when creating documents, but problematic for
+     archives who receive many versions over time. If a document
+     is valid to "v1.3d1"; it is also valid to the latest version
+     and to all older versions. @dtd-version will stay a CDATA
+     attribute, but will be optional, with a list of values, and
+     with no default.
+     
+ 38. ADDED <issue-title-group> added to <front-stub>
+     (optional, repeatable)
+ 
+ 37. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 36. QUESTION AND ANSWER MODULES - Added call to BITS question
+     and answer module names question-answer ent
+  
+ 35. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 34. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+    ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+ 
+ 33. @dtd-version becomes "1.2" from "1.2d2"
+  
+ 32. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+   =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 31. DATE-NOT-AVAILABLE - Inside <article-meta> and <front-stub>,
+     a new element <pub-date-not-available> was added as an
+     alternatives to <pub-date>. The meaning is that a 
+     publication date was (for whatever reason) not available. 
+     Presence of the element says nothing about publication 
+     status.
+ 
+ 30. INLINE INDEX TERMS  - Added invocation to BITS inline
+     (embedded) index term model
+ 
+ 29. @dtd-version becomes "1.2d2" from "1.2d1"
+
+ 28. JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed. 
+     
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d2  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 27. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 26. xsi:noNamespaceSchemaLocation added to attribute list of
+     <article>. Most modern processors do not need this, but
+     a user with an older processor requested it, so the JATS
+     Standing Committee acquiesced. This pseudo-attribute
+     cannot be used with a DOCTYPE declaration.
+
+ 25. FRONT STUB MODEL
+     - ARTICLE VERSION - Added new element <article-version>
+       inside <front-stub> to hold one version number for the 
+       article. <article-version> element may repeat inside
+       <article-version-alternatives> to hold version numbers 
+       from different systems.
+ 
+     - NO DATE - <pub-date> (optional repeatable) is now
+       followed by the optional new element 
+       <pub-date-not-available>. 
+ 
+     - PUB-HISTORY - <pub-history> (optional) added to hold
+       <event>s.
+   
+ 24. DTD version "1.2d1" from 1.1 
+
+ 23. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 22. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 21. ALI - Added ALI namespace for NISO Access and Indicator 
+     license reference and free to read elements.
+
+ 20. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+19. <VOLUME> INSIDE <ARTICLE-META> and <FRONT-STUB>
+   - Allowed <volume> to repeat inside <article-meta>, the types to 
+     be distinguished using @content-type
+   - Added new optional element <volume-issue-group> inside 
+     <article-meta) following all volume and issue elements
+     to hold volume-issue pairs (or n-tuples) when a second
+     and subsequent <volume> has its own related issue
+     information.
+
+ 18. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1d2/
+    
+ 17. MATHML 3.0 - Created a new version of the Archiving DTD to
+     take MathML 3.0 instead of MathML 2.0.
+     Nothing else changed from regular Archiving DTD.
+     Call to MathML setup module changed and added call to the
+     specific MathML 3.0 modules.
+  
+ 16. DTD Version - Updated the DTD-version attribute to "1.1d1" and 
+     the formal public identifier to the date: "v1.1d1 20130915//EN".
+
+ 15. GLOBAL ATTRIBUTES - Added the new module for Common (global)
+     attributes: %JATS-common-atts.ent;, called in before the
+     customizations models module.
+
+ 14. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added a new attribute list to:
+      - back
+      - front
+      - front-stub
+                          
+ 13. ABSTRACTS AND KEYWORDS
+       Changed "abstract*" to "(%abstract.class;)*"
+       and "kwd-group*" to "(%kwd-group.class;)*" since those
+       classes now exist. Elements should have a limited number of
+       ways to be invoked.
+        - article-meta (through %article-meta-model;)
+        - front-stub (through %front-stub-model;)
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+ 12. RELATED OBJECT - Added <related-object> everywhere
+     <related-article> was used, including inside 
+     <front-stub> using front-stub-model.
+   
+ 11. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+ 10. Updated the DTD-version attribute to "0.4" 
+   
+  9. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  8. BODY ATTRIBUTES - Added attribute list and new PE %body-atts;
+     to the model of <body>. The only current attribute is
+     @specific-use, which indicates, for example, not a real
+     tagged XML body, but a 'bag of words" for indexing purposes.
+
+  7. KEYWORD GROUP - Made <kwd-group> repeatable inside
+     <front-stub> by modifying %front-stub-model;
+
+  6. I18N - Changed the default for @xml:lang from "en" to
+     #IMPLIED, so that the @xml:lang would inherit properly and
+     not need to be over-ridden in
+      - <sub-article> through %sub-article-atts;
+      - <response> through %response-atts;
+
+  5. AFFILIATION ALTERNATIVES - Added the element <aff-alternatives>
+     to <front-stub> through %front-stub-model;. This element
+     will hold multiple <aff>s that are a representation of a
+     single affiliation, for example, the name of an institution
+     in two languages or two scripts.
+
+  4. FRONT MATTER - Modified %front-model; to add the elements:
+        ack | bio | fn-group | glossary (via %front.class;)
+     to front matter content model.
+
+  3. LANGUAGE CODES - Codes for languages as well as variants,
+     transliterations, regions, scripts, and combinations
+     such as "Jpan"(Han + Hiragana + Katakana). These values should be
+     taken from RFC 5646/W3C/IANA Subtag Registry recommendations
+     and can be found online at:
+       http://www.iana.org/assignments/language-subtag-registry
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  2. Changed default @xml:lang from "EN" from "en" to match latest
+     RFC 4646/W3C/IANA Subtag Registry recommendations
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/
+-->
+<!-- ============================================================= -->
+<!--                    DESIGN CONSIDERATIONS                      -->
+<!-- ============================================================= -->
+
+
+<!-- MODULAR DTD LIBRARY
+                        A set of journal archiving and interchange
+                        DTD modules was written as the basis for
+                        publishing, interchange, and repository
+                        DTDs, with the intention that DTDs for
+                        specific purposes, such as this Journal
+                        Archiving and Interchange DTD, would be
+                        developed based on them.
+
+                        This archiving DTD has been designed to
+                        be descriptive, open, and inclusive to
+                        allow journal articles to be translated into
+                        this format as conveniently as possible
+                        from a wide variety of proprietary journal
+                        article DTDs (such as Blackwell, Keton, and
+                        Ovid).
+
+                        This Archiving DTD has been developed from
+                        the JATS DTD Suite modules, in the approved 
+                        manner, making changes to the declarations 
+                        in those modules by over-riding Parameter 
+                        Entity contents by redefining the entities 
+                        in the:
+                            %archivecustom-classes.ent;
+                            %archivecustom-mixes.ent;
+                            %archivecustom-models.ent;
+                        modules, which are called from this DTD file.
+                        No changes to any of the original JATS DTD
+                        Suite modules are required in order to 
+                        use this DTD.                              -->
+
+
+<!-- ============================================================= -->
+<!--                    MODULES OF MODULES INVOKED                 -->
+<!-- ============================================================= -->
+
+
+<!--                    MODULE TO NAME DTD-SPECIFIC MODULES        -->
+<!--                    Names all DTD-specific external modules    -->
+<!ENTITY % archivecustom-modules.ent 
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD-Specific Modules v1.3 20210610//EN" 
+"JATS-archivecustom-modules1-3.ent"                                >
+%archivecustom-modules.ent;
+
+
+<!--                    MODULE TO NAME THE MATHML 3.0 MODULES      -->
+<!--                    Names all DTD-specific external modules    -->
+<!ENTITY % mathml3-modules.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS MathML 3.0 Modules v1.3 20210610//EN"
+"JATS-mathml3-modules1-3.ent"                                      >
+%mathml3-modules.ent;
+
+
+
+<!--                    MODULE TO NAME THE MODULES                 -->
+<!--                    Declares all the external modules that are
+                        part of the modular JATS DTD Suite library. 
+                        Thus it does NOT declare itself; 
+                        the DTD-specific module-of-modules; 
+                        any of the DTD-specific class,
+                        mix, or model over-ride modules; or any 
+                        new content modules specific to this DTD.
+                        Those are declared in the DTD-specific
+                        module of modules.
+                           Since this module declares but does not
+                        invoke modules, this DTD then invokes any
+                        modules it uses by referencing the external
+                        Parameter Entities defined in the Module of
+                        Modules. To include a set of elements (such
+                        as all the lists or the table elements) this
+                        module defines the external Parameter Entity
+                        for the module(s) that contains the table
+                        declarations and the DTD references that
+                        entity.                                    -->
+<!ENTITY % modules.ent  PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Module of Modules v1.3 20210610//EN"
+"JATS-modules1-3.ent"                                              >
+%modules.ent;
+
+<!-- ============================================================= -->
+<!--                    NISO ALI NAMESPACE SETUP                   -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFINE ALI NAMESPACE ATTRIBUTE AND PREFIX  -->
+<!--                    Names the module defines the NISO Access and 
+                        Indicators Exchange Model namespace, prefix, 
+                        and pseudo-attribute @xmlns.               -->
+%JATS-ali-namespace.ent;
+                                                            
+
+<!-- ============================================================= -->
+<!--                    SET UP COMMON (ALL ELEMENT) ATTRIBUTES     -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON ATTRIBUTES MODULE                   -->
+<!--                    Set up the common attributes, those used on
+                        nearly all elements.
+                        Must be called before the custom models
+                        module.                                    -->
+%JATS-common-atts.ent;
+
+
+<!-- ============================================================= -->
+<!--                    CUSTOMIZATION MODULES INVOKED              -->
+<!--                    Note: These modules must be called after   -->
+<!--                    all Module of Modules but before any other -->
+<!--                    modules. Unlike any other grouping, order  -->
+<!--                    of these modules matters.                  -->
+<!-- ============================================================= -->
+
+
+<!--                    DTD-SPECIFIC CLASS CUSTOMIZATIONS MODULE   -->
+<!--                    Names the module that holds the DTD-specific
+                        class definitions for the Journal Archiving
+                        and Interchange DTD that over-rides the Suite
+                        defaults.
+                        (Defined in %archivecustom-modules.ent; )  -->
+%archivecustom-classes.ent;
+
+
+<!--                    DEFAULT ELEMENT CLASSES MODULE             -->
+<!--                    Names the module that holds the standard
+                        class definitions for the JATS DTD Suite.  -->
+%default-classes.ent;
+
+
+<!--                    DTD-SPECIFIC MIX CUSTOMIZATIONS MODULE     -->
+<!--                    Set up the Parameter Entities and element
+                        class definitions that will be used to
+                        over-ride some element mixes in this DTD.
+                        (Defined in %archivecustom-modules.ent; )  -->
+%archivecustom-mixes.ent;
+
+
+<!--                    DEFAULT MIX CUSTOMIZATIONS MODULE          -->
+<!--                    Names the module that holds the standard
+                        mix definitions for the JATS DTD Suite.    -->
+%default-mixes.ent;
+
+
+<!--                    DTD-SPECIFIC MODELS/ATTRIBUTES CUSTOMIZATIONS
+                        MODULE                                     -->
+<!--                    Names the module that holds the over-rides
+                        of content models, attribute lists, elements
+                        lists to be used in content models, and
+                        attribute values. These are DTD-specific.
+                        (Defined in %archivecustom-modules.ent; )  -->
+%archivecustom-models.ent;
+
+
+<!-- ============================================================= -->
+<!--                    COMMON (SHARED) ELEMENTS MODULE INVOKED    -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON (SHARED) DECLARATIONS               -->
+<!--                    Declarations for elements, attributes,
+                        entities, and Notations that are shared by
+                        more than one class module. Note: Must be
+                        called before any of the class modules.    -->
+
+%common.ent;
+
+
+<!-- ============================================================= -->
+<!--                    JOURNAL ARTICLE CLASS ELEMENTS (alpha)     -->
+<!-- ============================================================= -->
+
+<!--                    ARTICLE METADATA ELEMENTS                  -->
+%articlemeta.ent;
+
+
+<!--                    BACK MATTER ELEMENTS                       -->
+%backmatter.ent;
+
+
+<!--                    DISPLAY (GRAPHICAL) ELEMENTS               -->
+%display.ent;
+
+
+<!--                    FORMATTING ELEMENT CLASSES                 -->
+<!--                    Elements that change rendition/display.    -->
+%format.ent;
+
+
+<!--                    FUNDING ELEMENTS                           -->
+<!--                    Elements that describe the sponsorship or
+                        open access                                -->
+%funding.ent;
+
+
+<!--                    JOURNAL METADATA ELEMENTS                  -->
+%journalmeta.ent;
+
+
+<!--                    LINK CLASS ELEMENTS                        -->
+%link.ent;
+
+
+<!--                    LIST CLASS ELEMENTS                        -->
+%list.ent;
+
+
+<!--                    MATH ELEMENTS                              -->
+%math.ent;
+
+
+<!--                    NLM CITATION ELEMENT                       -->
+%nlmcitation.ent;
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+%para.ent;
+
+
+<!--                    PHRASE-LEVEL ELEMENTS                      -->
+%phrase.ent;
+
+
+<!--                    BIBLIOGRAPHIC REFERENCE (CITATION)
+                        CLASS ELEMENTS                             -->
+%references.ent;
+
+
+<!--                    RELATED OBJECT ELEMENT                     -->
+<!--                    Defines the <related-object> element to
+                        describe a related object such as a
+                        related book or a dataset.                 -->
+%related-object.ent;
+
+
+<!--                    SECTION ELEMENTS                           -->
+%section.ent;
+
+
+<!-- ============================================================= -->
+<!--                    THE REST OF THE EXTERNAL MODULES INVOKED   -->
+<!-- ============================================================= -->
+
+
+<!--                    BITS EMBEDDED INDEX ELEMENTS MODULE        -->
+<!--                    Element declarations the index elements
+                        which are embedded in the article 
+                        narrative.                                 -->
+%index-term.ent;
+
+
+<!--                    BITS QUESTION AND ANSWER MODULE            -->
+<!--                    Element declarations for BITS questions
+                        and answers (not complete tests, but used
+                        to put build quizzes and tests.            -->
+%question-answer.ent;
+
+
+<!-- ============================================================= -->
+<!--                    THE REST OF THE EXTERNAL MODULES INVOKED   -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML SETUP MODULE                        -->
+<!--                    Invoke the MathML modules                  -->
+%mathml3-mathmlsetup.ent;
+
+
+
+<!--                    XHTML TABLE SETUP MODULE                   -->
+<!--                    Set up the necessary Parameter Entity values
+                        and then invoke XHTML (HTML 4.0) table
+                        module                                     -->
+%XHTMLtablesetup.ent;
+
+
+<!--                    SPECIAL CHARACTERS DECLARATIONS            -->
+<!--                    Standard XML special character entities
+                        used in this DTD                           -->
+%xmlspecchars.ent;
+
+
+<!--                    CUSTOM SPECIAL CHARACTERS DECLARATIONS     -->
+<!--                    Custom special character entities created
+                        specifically for use in this DTD Suite     -->
+%chars.ent;
+
+
+<!--                    NOTATION DECLARATIONS MODULE               -->
+%notat.ent;
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    DTD VERSION                                -->
+<!--                    What version of this DTD was used to make
+                        the document instance under consideration. -->
+<!ENTITY % dtd-version
+            "dtd-version
+                        (3.0 | 0.4 | 1.0 | 1.1d1 | 1.1d2 | 1.1d3 | 
+                         1.1 | 1.2d1 | 1.2d2 | 1.2 | 1.3d1 | 1.3d2 |
+                         1.3)
+                                                          #IMPLIED"  >
+
+
+<!--                    ARTICLE ATTRIBUTES                         -->
+<!--                    Attributes for the top-level element
+                        <article>                                  -->
+<!ENTITY % article-atts
+            "%jats-common-atts;                                       
+             article-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           'en'
+             %dtd-version;
+             %XLINK.xmlns.attrib;
+             %MATHML.xmlns.attrib;
+             %ali.xmlns.attrib;
+             %Schema.xmlns.attrib; 
+             %Schema.prefix;:noNamespaceSchemaLocation   
+                        CDATA          #IMPLIED"                    >
+
+
+<!--                    BACK ATTRIBUTES                            -->
+<!--                    Attributes for the <back> element          -->
+<!ENTITY % back-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    BODY ATTRIBUTES                            -->
+<!--                    Attributes for the <body> element          -->
+<!ENTITY % body-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    FRONT ATTRIBUTES                           -->
+<!--                    Attributes for the <front> element         -->
+<!ENTITY % front-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    FRONT STUB ATTRIBUTES                      -->
+<!--                    Attributes for the <front-stub> element    -->
+<!ENTITY % front-stub-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    SUB-ARTICLE ATTRIBUTES                     -->
+<!--                    Attributes for the <sub-article> element   -->
+<!ENTITY % sub-article-atts
+            "%jats-common-atts;                                       
+             article-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    RESPONSE ATTRIBUTES                        -->
+<!--                    Attributes for the <response> element      -->
+<!ENTITY % response-atts
+            "%jats-common-atts;                                       
+             response-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    JOURNAL ARTICLE ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE MODEL (LIMITED)                    -->
+<!--                    Article-like model used for, for example,
+                        a short sub-article such as a news brief that
+                        is contained in side a journal article.    -->
+<!ENTITY % article-short-model
+                        "(processing-meta?, (front | front-stub),
+                          body?, back?, floats-group?)"              >
+
+
+<!--                    ARTICLE MODEL WITH SUB-ARTICLE OR RESPONSE -->
+<!--                    Typical journal article model, which may
+                        contain extended components, such as
+                        sub-articles or responses,                 -->
+<!ENTITY % article-full-model
+                        "(processing-meta?, front, 
+                          body?, back?, floats-group?,
+                          (sub-article* | response*) )"              >
+
+
+<!--                    ARTICLE                                    -->
+<!--                    The complete content of a journal article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article
+                                                                   -->
+<!ELEMENT  article      %article-full-model;                         >
+<!ATTLIST  article
+             %article-atts;                                          >
+
+
+<!-- ============================================================= -->
+<!--                    FRONT MATTER ELEMENTS                      -->
+<!-- ============================================================= -->
+
+
+<!--                    FRONT MATTER MODEL                         -->
+<!--                    Model for the <front> matter (the header
+                        metadata) of a journal article)            -->
+<!ENTITY % front-model  "(journal-meta?, article-meta,
+                          (%list.class; | %front.class; |
+                           %front-back.class;)* )"                   >
+
+
+<!--                    FRONT MATTER                               -->
+<!--                    The metadata concerning an article, such as
+                        the name and issue of the journal in which it
+                        appears and the name and author(s) of the
+                        article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=front
+                                                                   -->
+<!ELEMENT  front        %front-model;                                >
+<!ATTLIST  front
+             %front-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    BODY ELEMENTS                              -->
+<!-- ============================================================= -->
+
+
+<!--                    BODY MODEL                                 -->
+<!--                    Content model for the Body (main textual
+                        content) of a journal article.             -->
+<!ENTITY % body-model   "((%para-level;)*, (%sec-level;)*,
+                          sig-block?)"                               >
+
+
+<!--                    BODY OF THE ARTICLE                        -->
+<!--                    The main textual portion of the article that
+                        conveys the content.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=body
+                                                                   -->
+<!ELEMENT  body         %body-model;                                 >
+<!ATTLIST  body
+             %body-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENTS                       -->
+<!-- ============================================================= -->
+
+
+<!--                    BACK MATTER MODEL                          -->
+<!--                    Content model for the Back Matter (ancillary
+                        material such as appendices) of a journal
+                        article.                                   -->
+<!ENTITY % back-model   "(label?, title*,
+                          (%doc-back-matter-mix;)* )"                >
+
+
+<!--                    BACK MATTER                                -->
+<!--                    Ancillary or supporting material not included
+                        as part of the main textual content of a
+                        journal article, for example appendices and
+                        acknowledgments.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=back
+                                                                   -->
+<!ELEMENT  back         %back-model;                                 >
+<!ATTLIST  back
+             %back-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    SUB-ARTICLE                                -->
+<!-- ============================================================= -->
+
+
+<!--                    SUB-ARTICLE MODEL                          -->
+<!--                    Content model for the <sub-article> element
+                                                                   -->
+<!ENTITY % sub-article-model
+                        "(processing-meta?, (front | front-stub), 
+                          body?, back?, floats-group?,
+                          (sub-article* | response*) )"              >
+
+
+<!--                    SUB-ARTICLE                                -->
+<!--                    An article that is completely contained
+                        inside another article. Both the article and
+                        the sub-article have their own metadata.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sub-article
+                                                                   -->
+<!ELEMENT  sub-article  %sub-article-model;                          >
+<!ATTLIST  sub-article
+             %sub-article-atts;                                      >
+
+
+<!--                    FRONT MODEL STUB                           -->
+<!--                    Content model for the <front-stub> element,
+                        a reduced metadata set for use in
+                        sub-articles and responses.                -->
+<!ENTITY % front-stub-model
+                       "(article-id*, (%article-version.class;)?, 
+                         article-categories?,
+                         title-group?,
+                         (%contrib-group.class; |
+                          %aff-alternatives.class; | %x.class;)*,
+                         author-notes?, ( (%pub-date.class;)* | 
+                           pub-date-not-available?), 
+                         volume*, volume-id*, volume-series?,
+                         issue*, issue-id*,
+                         issue-title*, issue-title-group*, 
+                         issue-sponsor*, issue-part?, 
+                         volume-issue-group*, isbn*,
+                         supplement?,
+                         ( ( (fpage, lpage?)?, page-range?) |
+                           elocation-id )?,
+                         (%address-link.class; | product |
+                          supplementary-material)*,
+                         history?, pub-history?, permissions?, 
+                         self-uri*, (%related-article.class;)*, 
+                         (%abstract.class;)*,
+                         trans-abstract*, (%kwd-group.class;)*,
+                         funding-group*, support-group*,
+                         conference*, counts?,
+                         custom-meta-group?)"                        >
+                         
+
+<!--                    STUB FRONT METADATA                        -->
+<!--                    A reduced metadata set for use in
+                        sub-articles and responses, which will
+                        inherit metadata not defined in the stub
+                        from the enclosing article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=front-stub
+                                                                   -->
+<!ELEMENT  front-stub   %front-stub-model;                           >
+<!ATTLIST  front-stub
+             %front-stub-atts;                                       >
+
+
+<!-- ============================================================= -->
+<!--                    RESPONSE ELEMENTS                          -->
+<!-- ============================================================= -->
+
+
+<!--                    RESPONSE                                   -->
+<!--                    Reply, response, or commentary concerning the
+                        journal article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=response
+                                                                   -->
+<!ELEMENT  response     %article-short-model;                        >
+<!ATTLIST  response
+             %response-atts;                                         >
+
+
+<!-- ================== End Journal Archiving and Interchange DTD  -->
diff --git a/dtd/JATS-archivecustom-classes1-3.ent b/dtd/JATS-archivecustom-classes1-3.ent
new file mode 100644
index 0000000..676de4d
--- /dev/null
+++ b/dtd/JATS-archivecustom-classes1-3.ent
@@ -0,0 +1,409 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD Customize Classes Module    -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD Customize Classes Module v1.3 20210610//EN"
+Delivered as file "JATS-archivecustom-classes1-3.ent"              -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      --> 
+<!--             JATS DTD Suite                                    -->         
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             over-ride the JATS DTD Suite default named        -->
+<!--             element classes.                                  -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before the   -->
+<!--             content modules that declare elements, and before -->
+<!--             the default classes module.                       -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created from the JATS DTD Suite.     -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is      -->
+<!--             built from the JATS DTD Suite.                    -->
+<!--                                                               -->
+<!--             This DTD and the Suite are a continuation of      -->
+<!--             the work done by NCBI, Mulberry Technologies,     -->
+<!--             and Inera Inc. on the NLM Journal Archiving       -->
+<!--             and Interchange DTD Suite, which was originally   -->
+<!--             released in December, 2002.                       -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 16. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 15. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 14. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 13. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 12. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 11. BITS "2.0" and "v2.0 20151225" remains unchanged
+    
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed. 
+     
+     =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  10. JATS "1.2d1" and "v1.2d1 20170631" became
+      JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+  9. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  8. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  6. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  5. CITATION ALTERNATIVES - Added a new element 
+     <citation-alternatives> to the citation.class. The element
+     will hold, for example, a single citation in multiple
+     languages or a single citation tagged as a <mixed-citation>
+     complete with punctuation and spacing and also as an
+     <element-citation> with all punctuation and spacing removed.
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  4. Updated the DTD-version attribute to "0.4" 
+   
+  3. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+  2. AFFILIATION ALTERNATIVES - Added the element <aff-alternatives>
+     to contrib-info.class to hold multiple <aff>s that are
+     representations of a single affiliation, for example, the name
+     of an institution in two languages or two scripts.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    METADATA CLASSES (articlemeta.ent)         -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR INFORMATION CLASS              -->
+<!--                    Metadata about a contributor
+                        Added <fn>                                 -->
+<!ENTITY % contrib-info.class
+                        "address | aff | aff-alternatives |
+                         author-comment | bio | email |  etal |
+                         ext-link | fn | on-behalf-of | role |
+                         uri | xref"                                 >
+
+
+<!-- ============================================================= -->
+<!--                    CITATION CLASSES (references.ent)          -->
+<!-- ============================================================= -->
+
+
+<!--                    CITATION CLASS ELEMENTS                    -->
+<!--                    Reference to an external document, as used
+                        within, for example, the text of a
+                        paragraph                                  -->
+<!ENTITY % citation.class
+                        "citation-alternatives | element-citation | 
+                         mixed-citation | nlm-citation"              >
+
+
+<!--                    CITATION MINUS ALTERNATIVES CLASS ELEMENTS -->
+<!--                    All the citation elements except the
+                        <citation-alternatives> element.           -->
+<!ENTITY % citation-minus-alt.class
+                        "element-citation | mixed-citation | 
+                         nlm-citation"                               >
+
+<!-- ============================================================= -->
+<!--                    PRESENTATION INFO CLASSES                  -->
+<!-- ============================================================= -->
+
+
+<!--                    X-GENERATED PUNCTUATION CLASS              -->
+<!--                    Class containing a single element that will
+                        hold generated punctuation or other
+                        generatable text, for example, the commas or
+                        semicolons between keywords.               -->
+<!ENTITY % x.class      "x"                                          >
+
+
+<!-- ================== End Archiving Classes Customization ====== -->
diff --git a/dtd/JATS-archivecustom-mixes1-3.ent b/dtd/JATS-archivecustom-mixes1-3.ent
new file mode 100644
index 0000000..aca1d42
--- /dev/null
+++ b/dtd/JATS-archivecustom-mixes1-3.ent
@@ -0,0 +1,601 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD Customize Mixes Module      -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD Customize Mixes Module v1.3 20210610//EN"
+Delivered as file "JATS-archivecustom-mixes1-3.ent"                -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      --> 
+<!--             JATS DTD Suite                                    -->         
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             over-ride the JATS DTD Suite default named,       -->
+<!--             general purpose mixes. (Mixes for particular      -->
+<!--             elements are declared in the Archive Custom       -->
+<!--             Models module.)                                   -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before the   -->
+<!--             default mixes modules (%default-mixes;)           -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created from the JATS DTD Suite.     -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is      -->
+<!--             built from the JATS DTD Suite.                    -->
+<!--                                                               -->
+<!--             This DTD and the Suite are a continuation of      -->
+<!--             the work done by NCBI, Mulberry Technologies,     -->
+<!--             and Inera Inc. on the NLM Journal Archiving       -->
+<!--             and Interchange DTD Suite, which was originally   -->
+<!--             released in December, 2002.                       -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 19. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 18. TABLE CELLS - Added new elements to <td> using %inside.cell;
+     and <entry> using %Flowmix;:
+        <disp-quote>, <speech>, <statement>, <verse-group>
+
+ 17. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+ 16. QUESTIONS AND ANSWERS
+
+     - NEW PE for ANSWERS  - Added new mix "answer para level"
+       to name the elements that may be used at the same
+       structural level as a paragraph, when used inside an 
+       <answer>. This rather awkward parameter entity was created
+       to overcome the DTD determinism issues when using 
+       <explanation> inside an <answer>. In order for 
+       <explanation> to be used at the end of an answer, 
+       it must not be allowed at the paragraph level
+       inside <answer>.
+     
+     - INSIDE TABLE CELLS - Added the question answer class
+       to the contents of table cell using inside cell mix.
+ 
+ 15. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 14. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 13. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 12. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed. 
+     
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 11. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 10. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  9. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  8. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  6. PARAGRAPH IN TABLE CELL - Added <p> to the contents of
+     table cells, through %inside-cell; (using
+     %nothing-but-para.class;).
+  
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. RELATED OBJECT - Added <related-object> everywhere
+     <related-article> was used.
+   
+  4. PARA-LEVEL PARAMETER ENTITY CONFLICT - Changed the parameter
+     entity %para-level; to use the PE %nothing-but-para.class;,
+     removing the similar PE "just-para.class;". It is possible to 
+     add element(s) to %just-para.class;, so that the added element(s)
+     may be used everywhere <p> is used. Such elements would also be
+     named in %block-display.class;. This would lead to a conflict
+     in %para-level; if both %just-para.class; and
+     %block-display.class; named <p>. So %just-para.class; is replaced
+     here in %para-level;. This is backward compatible for all XML
+     documents. If a JATS customization has modified %just-para.class;
+     they may need to change their customization to accommodate.
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    ELEMENT MIXES FOR USE IN CONTENT MODELS    -->
+<!--                    (MIXES ARE COMPOSED USING CLASSES)         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    EXCEPTION: A MIX USED IN OTHER MIXES       -->
+<!-- ============================================================= -->
+
+
+<!--                    ALL PHRASE-LEVEL ELEMENTS                  -->
+<!--                    This Parameter Entity contains all of the
+                        phrase-level elements in the entire
+                        Archival Tag Set EXCEPT THE <break> element.
+                        MAINTENANCE NOTE:
+                        Since this is used inside other mixes
+                        (like a class and unlike all other mixes)
+                        all-phrase must
+                          - be declared first in this module.
+                          - does not start with an OR bar, as all
+                            other inline mixes do                  -->
+<!ENTITY % all-phrase   "%address-link.class; | %article-link.class; |
+                         %appearance.class; | %emphasis.class;  |
+                         %inline-display.class; |
+                         %inline-math.class; | %math.class; |
+                         %phrase.class; | %simple-link.class; |
+                         %subsup.class; | %x.class;"                 >
+
+
+<!-- ============================================================= -->
+<!--                    TABLE ELEMENT MIXES                        -->
+<!-- ============================================================= -->
+
+
+<!--                    INSIDE TABLE CELL ELEMENTS                 -->
+<!--                    Mixed with #PCDATA inside a table cell, such
+                        as a <td> or <th> element in the XHTML table
+                        model, the <entry> element in the OASIS CALS
+                        table model, etc.  This PE will be used as the
+                        value of %Flow.mix;, %paracon;, etc.
+                        MAINTENANCE NOTE: Inside cell is an exception,
+                        an inline mix that does not start with an OR
+                        bar. This is because is used within the
+                        PE -%Flow.mix;, which is an inline mix
+                        defined in the course of the XHTML Table DTD,
+                        a DTD not under control of this DTD Suite. -->
+<!ENTITY % inside-cell  "%all-phrase; | %block-math.class; |
+                         %break.class; | %chem-struct-wrap.class; |
+                         %citation.class; | %intable-para.class; |
+                         %list.class; | %nothing-but-para.class; | 
+                         %question-answer.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENT MIXES(%backmatter.ent;)-->
+<!-- ============================================================= -->
+
+
+<!--                    DOCUMENT BACK MATTER ELEMENTS              -->
+<!--                    Back Matter Elements used by a full document
+                        such as a journal article. This is an element
+                        grouping rather than a class. These
+                        elements may also appear in the content models
+                        of structural elements, such as back matter.
+                                                                   -->
+<!ENTITY % doc-back-matter-mix
+                        "%back.class; | %front-back.class; |
+                         %sec.class;"                                >
+
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH-LEVEL ELEMENT MIXES              -->
+<!-- ============================================================= -->
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!--                    Elements that may be used at the same
+                        structural level as a paragraph, for
+                        example inside a Section
+                        Note: There a major overlap between this
+                        parameter entity and that for the elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a
+                        paragraph, but block elements such as quotes
+                        and lists may appear either within a
+                        paragraph or at the same level as a
+                        paragraph. This serves a requirement in a
+                        repository DTD, since some incoming material
+                        will have restricted such elements to only
+                        inside a paragraph,  some incoming material
+                        will have restricted them to only outside a
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.                      -->
+<!ENTITY % para-level   "%block-display.class; | %block-math.class; |
+                         %list.class; | %math.class; | 
+                         %nothing-but-para.class; |
+                         %related-article.class; |
+                         %rest-of-para.class; | %x.class;"           >
+
+
+<!--                    INSIDE AN ANSWER PARAGRAPH-LEVEL ELEMENTS  -->
+<!--                    The elements that may be used at the same
+                        structural level as a paragraph, when 
+                        used inside an <answer>.
+                        Remarks: This rather awkward parameter entity
+                        was created to overcome the DTD determinism
+                        issues when using <explanation> inside
+                        an <answer>. In order for <explanation> to
+                        be used at the end of an answer, it must
+                        not be allowed at the paragraph level inside
+                        <answer>.                                  -->
+<!ENTITY % answer-para-level   
+                        "%block-display-minus-explanation.class; | 
+                         %block-math.class; |
+                         %list.class; | %math.class; |
+                         %nothing-but-para.class; |
+                         %related-article.class; |
+                         %rest-of-para.class; | %x.class;"           >
+
+
+
+<!-- ============================================================= -->
+<!--                    INLINE ELEMENT MIXES                       -->
+<!-- ============================================================= -->
+
+
+<!--                    EMPHASIS MIX ELEMENTS                      -->
+<!--                    Elements that may be used inside most of the
+                        emphasis class elements                    -->
+<!ENTITY % emphasized-text
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    JUST RENDITION                             -->
+<!--                    Only the simplest of the typographic
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be stripped down to only
+                        subscript and superscript by some, more
+                        restrictive DTDs.
+                        MAINTENANCE NOTE:  This Parameter Entity
+                        and the related PE "rendition-plus" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to change similar models individually .    -->
+<!ENTITY % just-rendition
+                        "| %all-phrase;"                             >
+
+
+<!--                    RENDITION MARKUP PLUS                      -->
+<!--                    Only the simplest of the typographic
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be enhanced slightly in some
+                        more permissive DTDs, and should always
+                        contain at least typographic emphasis,
+                        subscript, and superscript.
+                        MAINTENANCE NOTE: This Parameter Entity
+                        and the related PE "just-rendition" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to individually change similar models.
+                        modify entire groups of elements, but not
+                        to change similar models individually .    -->
+<!ENTITY % rendition-plus
+                        "| %all-phrase;"                             >
+
+
+<!--                    SIMPLE PHRASE-LEVEL TEXTUAL ELEMENTS       -->
+<!--                    Elements that may be used almost anywhere
+                        text is used, for example, inside a title.
+                        Simple text plus inline display and math
+                        elements.                                  -->
+<!ENTITY % simple-phrase
+                        "| %all-phrase;"                             >
+
+
+<!--                    SIMPLE TEXTUAL CONTENT                     -->
+<!--                    Elements that may be used inside elements
+                        that are really expected to be #PCDATA and
+                        not to contain any of these things.
+                        Note that in the original, this contained
+                        no math and no links, thus is was even
+                        simpler than %simple-phrase; (As of 2004,
+                        the two are the same.) s                    -->
+<!ENTITY % simple-text  "| %all-phrase;"                             >
+
+
+<!-- ================== End Archiving DTD Mixes Customization ==== -->
diff --git a/dtd/JATS-archivecustom-models1-3.ent b/dtd/JATS-archivecustom-models1-3.ent
new file mode 100644
index 0000000..9f8abbb
--- /dev/null
+++ b/dtd/JATS-archivecustom-models1-3.ent
@@ -0,0 +1,1613 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD Customize Content and       -->
+<!--             Attributes Module                                 -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD Customize Content and Attributes Module v1.3 20210610//EN"
+Delivered as file "JATS-archivecustom-models1-3.ent"               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      --> 
+<!--             JATS DTD Suite                                    -->         
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             over-ride the content models, parts of content    -->
+<!--             models, or attribute lists of the JATS DTD Suite  -->
+<!--                                                               -->
+<!--             Or-groups within models should use mixes or       -->
+<!--             classes rather than name elements directly.       -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before the   -->
+<!--             content modules that declare elements.            -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created from the JATS DTD Suite.     -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is      -->
+<!--             built from the JATS DTD Suite.                    -->
+<!--                                                               -->
+<!--             This DTD and the Suite are a continuation of      -->
+<!--             the work done by NCBI, Mulberry Technologies,     -->
+<!--             and Inera Inc. on the NLM Journal Archiving       -->
+<!--             and Interchange DTD Suite, which was originally   -->
+<!--             released in December, 2002.                       -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 53. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+     
+ 52. EXPANSION OF FIXED ATTRIBUTES LIST: There are four  
+     content-defined attributes which are CDATA values 
+     (undetermined) in Archiving, but which are named value 
+     lists in Publishing/Authoring:
+       - @fn-type 
+       - @person-group-type (override is in this module)
+       - @pub-id-type
+       - @ref-type 
+     In order to give users of Publishing and Authoing
+     more flexibility to name new values without 
+     destroying the benefit of named value lists:
+       - A new value “custom” has been added to the named
+           value list of each of these four attributes.
+       - A new attribute @custom-type has been added to
+           each element that takes one of these attributes.
+     The new attribute @custom-type was also added to
+     Green, so that documents valid to Blue or Pumpkin 
+     would also be also valid to Green.
+     In this module:
+      - The element <article-id> was given the new attribute 
+        @custom-type. The value "custom" will be
+        documented as a valid article-id type.
+       - The element <ref> was given the new attribute 
+        @custom-type. The value "custom" will be
+        documented as a valid reference type.
+       - The element <pub-id> was given the new attribute 
+        @custom-type. The value "custom" will be
+        documented as a valid publication ID type.
+    The Best Practice rule (unenforceable in DTDs, but  
+     enforceable in Schematron) is, that if you use the 
+     value “custom” from one of these lists, you should 
+     also record what type of 'custom' in the 
+     @custom-type attribute.    
+     
+ 51. OBJECT ID Added <object-id> to: 
+        <disp-formula>, <list>, <ref-list>
+
+ 50. SEE ALSO - The four vocabulary attributes were added to
+     <see-also>, which is defined in the BITS question-answer
+     model.
+
+ 49. STRING DATE - Used to be added to models using
+     %citation-additions.class, now added through
+     %references.class; and the same as Blue. Changed:
+       <element-citation>, <mixed-citation>
+       <product>, <related-article>, <related-object>
+
+ 48. ADDED <issue-title-group> added to <article-meta>
+     (optional, repeatable)
+ 
+ 47. DISPLAY FORMULA - Held our noses and added <caption> to 
+     <display-formula>.
+
+ 46. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 45. SIZE - All face markup (by face-markup.class) was added to the 
+     content model of <size>.
+ 
+ 44. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote)
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 43. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 42. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 41. ASSIGNING AUTHORITY - Added @assigning-authority to the
+     following elements, so that the type-of-identifier and
+     the party-responsible-for-identifier could both be
+     recorded. Previously, these values were both assigned to
+     the attribute @pub-id-type.
+        - <article-id>
+        - Note: <pub-id> already had @assigning-authority
+
+ 40. NON-MONETARY SUPPORT - Inside <article-meta> added new
+     <support-group> to hold both funding and
+     non-monetary support descriptions. <support-group> is 
+     both a peer to <funding-group> (backward compatibility)
+     and contains <funding-group>.
+ 
+ 39. PUBLICATION DATE-NOT-AVAILABLE - Inside <article-meta>, 
+     <front-stub>, <event>, and <event-desc>
+     added new element <pub-date-not-available>, as an 
+     alternative to <pub-date>. The meaning is that a 
+     publication date was (for whatever reason) not available. 
+     Presence of the element says nothing about publication 
+     status.
+ 
+ 38. DATE IN CITATION - Superscript and subscript added to
+     <date-in-citation>.
+  
+ 37. CONFERENCE DATE - Face markup (face-markup.class) 
+     added to <conf-date>.
+
+ 36. BITS "2.0" and "v2.0 20151225" remains unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed. 
+     
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 35. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+ 
+ 34. X - both <inline-graphic> and <private-char> added to 
+     elements allowed in <x>.
+
+ 33. INLINE FORMULA - Added accessibility elements <alt-text> and
+     <long-desc> to the model of inline formula, by adding the 
+     access.class PE.
+
+ 32. ARTICLE META MODEL
+     - ARTICLE VERSION - Added new element <article-version>
+       inside <article-metadata> to hold one version number for  
+       the article. <article-version> element may repeat inside
+       <article-version-alternatives> to hold version numbers 
+       from different systems.
+ 
+     - NO DATE - <pub-date> (optional repeatable) is now
+       followed by the optional new element 
+       <pub-date-not-available>. 
+ 
+     - PUBLICATION HISTORY - Added new element based on BITS,
+       <pub-history>, to hold <event>s as <history> holds
+       <date>s. New internal elements: <event>, <event-desc>
+       
+ 31. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 30. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 29. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+ 
+ 28.  RUBY MODEL CHANGED TO MATCH HTML5
+      - changed the Ruby content model to allow only a single
+        Ruby annotation on a single Ruby base:
+            (rb, (rt | (rp, rt, rp)) )
+        The Ruby textual annotation may take a pair of
+        Ruby parentheses, but these are optional.
+
+ 27. ATTRIBUTES FOR PUB-ID
+   - Added the linking attributes (optional version) to <pub-id> , 
+     so that a <pub-id> that is a DOI, for example, can carry the 
+     linking attributes and be made into a live link. In this use
+     of <pub-id>, the element is acting both as an identifier
+     and as a link.
+   - Added new attribute @assigning-authority to <pub-id>, to
+     carry new values such as "CrossRef" and to take some of the
+     semantic burden off the '@pub-id-type' attribute, when
+     values are organizations such as "Genbank" or "PDB".
+
+ 26. <OBJECT-ID> INSIDE <TRANS-ABSTRACT>
+     Allowed <object-id> at the beginning of <trans-abstract>, 
+     so that abstracts could be given DOIs.
+
+ 25. <VOLUME> INSIDE <ARTICLE-META>
+   - Allowed <volume> to repeat inside <article-meta>, the types to 
+     be distinguished using @content-type
+   - Added new optional element <volume-issue-group> inside 
+     <article-meta) following all volume and issue elements
+     to hold volume-issue pairs (or n-tuples) when a second
+     and subsequent <volume> has its own related issue
+     numbers.
+ 
+ 24. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 23. NEW <era> ELEMENT
+     Added <era> through date-parts.class to:
+      - <conf-date>
+      - <date-in-citation>
+      - <pub-date>
+      - <string-date>
+      - access-date (deprecated
+      - time-stamp (deprecated)
+
+ 22. INSTITUTIONS TO STANDARDS ORGANIZATIONS
+     Added the elements <institution-wrap> to the following elements
+     through the institution-wrap.class:
+      - <copyright-holder>
+      - <std-organization>
+
+ 21. RUBY ANNOTATIONS - Overrode the default JATS inclusions, to
+     change the more restricted face-markup class to the 
+     Archive-specific all Phrase. Elements change:
+      - <rb> Ruby Base (through %rb-elements;)
+
+ 20. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+ 19. ABSTRACTS AND KEYWORDS ON NEW STRUCTURES
+     - Added <abstract> (through %abstract.class;) and <kwd-group> 
+       (through %kwd-group.class;) to the following elements:
+        - disp-formula (through %disp-formula-elements;)
+
+     - Changed "abstract*" to "(%abstract.class;)*"
+       and "kwd-group*" to "(%kwd-group.class;)*" since those
+       classes now exist. Elements should have a limited number of
+       ways to be invoked.
+        - article-meta (through %article-meta-model;)
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 18. RELATED OBJECT - Added <related-object> everywhere
+     <related-article> was used, including inside 
+     <article-meta> using article-meta-model.
+
+ 17. CONTRIBUTOR MODEL - Added "contrib-id.class" to the 
+     <contrib> model, to hold identifiers for people,
+     such as publishers-specific IDs,  and ORCIDs.
+   
+ 16. VERSE-LINE ELEMENTS - Added the PE %verse-line-elements to
+     this module because the default expanded, and Archiving did
+     not need to expand as it already was expanded.
+   
+ 14. DATE ATTRIBUTES - Added attributes to <date> through @date-atts: 
+       a) @iso-8601-date - ISO 8601 standard date format
+          of the publication date. Format  YYYY-MM-DDThh:mm:ss 
+       b) @calendar - Name of the calendar used (@calendar) in
+          naming this publication date (such as "Gregorian", 
+          "Japanese" (Emperor years), or "Islamic").
+       c) Added @publication-format, so that both publication
+          dates and history dates can separate the format of the
+          publication from the version/lifecycle event. Thus
+          both an "article" and a "manuscript" might be received.
+   
+ 13. STANDARDS ORGANIZATION - Added std-organization-elements
+     to increase what was allowed in the names of standards bodies.
+
+ 12. XREF REF TYPES - #9 below says "XREF ATTRIBUTES - Removed 
+     the %xref-atts PE from this module since the regular version 
+     (in xlink3.ent(?)) was equally inclusive. But it is NOT. 
+     Brought back %xref-atts;
+   
+ 11. ISSN-L ELEMENTS - Added <x> TO <issn-l> via 
+     %issn-l-elements;
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+ 10. Updated the DTD-version attribute to "0.4" 
+   
+  9. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+  7. XREF ATTRIBUTES - Removed the %xref-atts PE from this module
+     since the regular version (in xlink3.ent(?)) was equally 
+     inclusive. See #12 above.
+
+  6. ISSUE - Allowed to repeat inside <article-meta>
+
+  5. AFFILIATION ALTERNATIVES - Added the element <aff-alternatives>
+     to <article-meta> through %article meta-model;. This element
+     will hold multiple <aff>s that are a representation of a
+     single affiliation, for example, the name of an institution
+     in two languages or two scripts.
+
+  4. PERSON-GROUP - Became a mixed-content model, so the parameter
+     entity %person-group-model: was changed to
+     %person-group-elements;, which will be mixed with #PCDATA
+     as defined in references.ent. The PE person-group-model has
+     been retained in references.ent for compatibility, but has been
+     set to the mixed model using person-group-elements.
+
+  3. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to %display-atts;. Also added these attributes
+     to the following over-rides:
+      - article-id through article-id-atts (@specific-user only)
+      - award-id through award-id-atts (both)
+      - date through date-atts (@specific-use only)
+      - funding-statement through funding-statement-atts (both)
+      - pub-id through pub-id-atts (@specific-use only)
+      - trans-title through pub-id-atts (@specific-use only;
+         @xml:lang already)
+      - xref through xref-atts (both)
+
+  2. STRING-DATE - Added <string-date> back to the following
+     elements using %citation-additions.class;. It was accidentally
+     deleted during the 3.0 revision of -references.class:
+      - product         (%product-elements;)
+      - related-article (%related-article-elements;)
+      - related-object  (%related-object-elements;)
+      - funding-statement through funding-statement-atts (both)
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    INLINE MIXES TO OVER-RIDE CONTENT MODELS   -->
+<!--                    (ELEMENTS TO BE ADDED TO #PCDATA IN MODELS)-->
+<!-- ============================================================= -->
+
+
+<!--                    ABBREVIATION ELEMENTS                      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <abbrev> element                       -->
+<!ENTITY % abbrev-elements
+                        "| %all-phrase; | %def.class;"               >
+
+
+<!--                    ACCESS DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Access Date <access-date> element      -->
+<!ENTITY % access-date-elements
+                        "| %date-parts.class; | %x.class;"           >
+
+
+<!--                    AFFILIATION ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <aff> element                          -->
+<!ENTITY % aff-elements "| %address.class; | %all-phrase; |
+                           %break.class; | %label.class;"            >
+
+
+<!--                    ANONYMOUS ELEMENTS                         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <anonymous> element                     -->
+<!ENTITY % anonymous-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    ARTICLE TITLE ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <article-title> element.               -->
+<!ENTITY % article-title-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    CHEMICAL STRUCTURE ELEMENTS                -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Chemical Structure
+                        <chem-struct>                              -->
+<!ENTITY % chem-struct-elements
+                        "| %access.class; |  %all-phrase; |
+                         %break.class; | %id.class; |
+                         %label.class; | %list.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!--                    CITATION ELEMENTS                          -->
+<!--                    Content for both types of citation. These
+                        elements may be mixed with #PCDATA in the
+                        <mixed-citation> element (in which all
+                        punctuation and spacing are left intact), and
+                        they also constitute the choices that can be
+                        used to form the all-element-content of the
+                        <element-citation> element (in which
+                        punctuation and spacing are removed).
+                        Design Note: All inline mixes begin with an
+                        OR bar.                                    -->
+<!ENTITY % citation-elements
+                        "%article-link.class; | %appearance.class; |
+                         %emphasis.class;  | %inline-display.class; |
+                         %inline-math.class; | %label.class; |
+                         %math.class; |  %phrase.class; |
+                         %references.class; | %simple-link.class; |
+                         %subsup.class; |  %x.class;"                >
+
+
+<!--                    COLLABORATIVE (GROUP) AUTHOR ELEMENTS      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <collab> element. This is essentially
+                        %all-phrase; plus contrib-info and break.
+                        All-phase is not used because of
+                        duplication clashes with the
+                        -contrib-info.class;                       -->
+<!ENTITY % collab-elements
+                        "| %article-link.class; | %address.class; |
+                         %appearance.class; | %break.class; |
+                         %contrib-group.class; |
+                         %contrib-info.class; |
+                         %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %math.class; |
+                         %phrase.class; | %subsup.class; | %x.class;">
+
+
+<!--                    COMPOUND KEYWORD PART ELEMENTS             -->
+<!--                    Elements to be mixed with data characters
+                        inside the <compound-kwd-part> element     -->
+<!ENTITY % compound-kwd-part-elements
+                        "| %break.class; | %all-phrase;"             >
+
+
+<!--                    CONFERENCE DATE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <conf-date> element                    -->
+<!ENTITY % conf-date-elements
+                        "| %date-parts.class; | %face-markup.class; |
+                         %x.class;"                                  >
+
+
+<!--                    COMMENT ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Comment in a Citation <comment> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % comment-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    COPYRIGHT HOLDER ELEMENTS                  -->
+<!--                    Elements to be mixed with data characters
+                        inside the content model for the
+                        <copyright-holder> element.                -->
+<!ENTITY % copyright-holder-elements
+                        "| %institution-wrap.class; | %subsup.class; | 
+                         %x.class;"                                  >
+
+
+<!--                    COPYRIGHT STATEMENT ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <copyright-statement>                  -->
+<!ENTITY % copyright-statement-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    CORRESPONDENCE INFORMATION ELEMENTS        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the correspondence information.            -->
+<!ENTITY % corresp-elements
+                        "| %address.class; | %all-phrase; |
+                           %break.class; | %label.class;"            >
+
+
+<!--                    COUNTRY ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the country element.                       -->
+<!ENTITY % country-elements
+                        "| %x.class;"                                >
+
+
+<!--                    DATE IN CITATION ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Date Inside Citation <date-in-citation>
+                        element                                    -->
+<!ENTITY % date-in-citation-elements
+                        "| %date-parts.class; | %emphasis.class; |
+                           %subsup.class; | %x.class;"               >
+
+<!--                    FORMULA, DISPLAY ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <disp-formula>                         -->
+<!ENTITY % disp-formula-elements
+                        "| %all-phrase; | %abstract.class; |
+                         %access.class; | %break.class; | 
+                         %caption.class; |
+                         %display-back-matter.class; | %id.class; | 
+                         %kwd-group.class; | %subj-group.class; |
+                         %label.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!--                    EMAIL ADDRESS ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <email> element                        -->
+<!ENTITY % email-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    ET AL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <etal> element                          -->
+<!ENTITY % etal-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    EXTERNAL LINK ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <ext-link>                              -->
+<!ENTITY % ext-link-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    FUNDING STATEMENT ELEMENTS                 -->
+<!--                    Model for the <funding-statement> element  -->
+<!ENTITY % funding-statement-elements
+                        "| %all-phrase; | %funding.class;"           >
+
+
+<!--                    HISTORY ELEMENTS                           -->
+<!--                    Elements that may be mixed with data
+                        characters inside the model for <history>
+                        when <history> is modeled as a mixed content
+                        element.                                   -->
+<!ENTITY % history-elements
+                        "| %all-phrase; | %break.class; |
+                         %date.class;"                               >
+
+
+<!--                    FORMULA, INLINE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <inline-formula> element.              -->
+<!ENTITY % inline-formula-elements
+                        "| %access.class; | %all-phrase;"            >
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL ELEMENTS     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <inline-supplementary-material> element-->
+<!ENTITY % inline-supplementary-material-elements
+                        "| %access.class; | %all-phrase;"            >
+
+
+<!--                    INSTITUTION NAME ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <institution> element                  -->
+<!ENTITY % institution-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    ISBN ELEMENTS                              -->
+<!--                    Elements for use with data characters inside
+                        the model for the <isbn> element           -->
+<!ENTITY % isbn-elements
+                        "| %x.class;"                                >
+
+
+<!--                    ISSN ELEMENTS                              -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issn> element           -->
+<!ENTITY % issn-elements
+                        "| %x.class;"                                >
+
+
+<!--                    ISSN-L ELEMENTS                            -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issn-l> element         -->
+<!ENTITY % issn-l-elements
+                        "| %x.class;"                                >
+
+
+<!--                    ISSUE TITLE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <issue-title> element                  -->
+<!ENTITY % issue-title-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    KEYWORD CONTENT ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a keyword.                                 -->
+<!ENTITY % kwd-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    LABEL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <label> element                        -->
+<!ENTITY % label-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    LINK ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        linking element such as <xref>, <target>,
+                        and <ext-link>                             -->
+<!ENTITY % link-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    LONG DESCRIPTION ELEMENTS                  -->
+<!--                    Elements to be mixed with data characters
+                        inside the <long-desc> element             -->
+<!ENTITY % long-desc-elements
+                        "| %x.class;"                                >
+
+
+<!--                    METADATA DATA NAME ELEMENTS                -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <meta-name> element                    -->
+<!ENTITY % meta-name-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    METADATA DATA VALUE ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <meta-value> element                   -->
+<!ENTITY % meta-value-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    NAMED CONTENT ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <named-content> element                -->
+<!ENTITY % named-content-elements
+                        "| %all-phrase; |
+                         %block-display-noalt.class; |
+                         %block-math.class; | %list.class; |
+                         %rest-of-para.class;"                       >
+
+
+<!--                    PARAGRAPH ELEMENTS                         -->
+<!--                    Elements that may be used within a paragraph
+                        in a mixed content model with #PCDATA.
+                        Design Note: There is a major overlap between
+                        this parameter entity and the mix for elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a
+                        paragraph, but block elements such as quotes
+                        and lists may appear either within a
+                        paragraph or at the same level as a
+                        paragraph. This serves a requirement in a
+                        repository DTD, since some incoming material
+                        will have restricted such elements to only
+                        inside a paragraph, some incoming material
+                        will have restricted them to only outside a
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.                      -->
+<!ENTITY % p-elements   "| %all-phrase; |
+                         %block-display-noalt.class; |
+                         %block-math.class; | %citation.class; |
+                         %funding.class; | %list.class; |
+                         %rest-of-para.class;"                       >
+
+
+<!--                    PERSON GROUP ELEMENTS                      -->
+<!--                    Elements to be mixed with #PCDATA characters
+                        within the Person Group element
+                        (name class include <string-name> in this
+                        tag set.-->
+<!ENTITY % person-group-elements
+                        "| %name.class; | %person-group-info.class; |
+                          %x.class;"                                 >
+
+
+<!--                    PREFORMATTED TEXT ELEMENTS                 -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the content model for the
+                        <preformat> element, in which whitespace,
+                        such as tabs, line feeds, and spaces will
+                        be preserved.                              -->
+<!ENTITY % preformat-elements
+                        "| %access.class; | %all-phrase; |
+                         %display-back-matter.class; "               >
+
+
+<!--                    PRODUCT ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <product> element
+                        (Note: all-phrase was replicated and not
+                        used directly because the article-link.class
+                        elements are repeated in -references.class
+                        and therefore cause duplication.           -->
+<!ENTITY % product-elements
+                        "| %article-link.class; |
+                         %appearance.class; | %break.class; |
+                         %emphasis.class;  |
+                         %inline-display.class; |
+                         %inline-math.class; | %label.class; |
+                         %math.class; | %phrase.class; |
+                         %price.class; | %references.class; |
+                         %simple-link.class; |
+                         %subsup.class; | %x.class;"                 >
+
+
+<!--                    PUBLISHER'S LOCATION ELEMENTS              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <publisher-loc> element                -->
+<!ENTITY % publisher-loc-elements
+                        "| %address.class; | %all-phrase; |
+                         %break.class;"                              >
+
+
+<!--                    RELATED ARTICLE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <related-article> element.
+                        (Note: all-phrase was replicated and not
+                        used directly because the article-link.class
+                        elements are repeated in -references.class
+                        and therefore cause duplication.)          -->
+<!ENTITY % related-article-elements
+                        " | %article-link.class; |
+                         %appearance.class; | %break.class; |
+                         %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %journal-id.class; |
+                         %label.class; | %math.class; |
+                         %phrase.class; | %references.class; |
+                         %simple-link.class; |
+                         %subsup.class; | %x.class;"                 >
+
+
+<!--                    RELATED OBJECT ELEMENTS                    -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <related-object> element.
+                        (Note: all-phrase was replicated and not
+                        used directly because the article-link.class
+                        elements are repeated in -references.class
+                        and therefore cause duplication.)          -->
+<!ENTITY % related-object-elements
+                        "| %article-link.class; |
+                         %appearance.class; | %break.class; |
+                         %emphasis.class;  |
+                         %inline-display.class; |
+                         %inline-math.class; | %label.class; |
+                         %math.class; | %phrase.class; |
+                         %references.class; |
+                         %simple-link.class; |
+                         %subsup.class; | %x.class;"                 >
+
+
+<!--                    ROLE ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <role>
+                        Design Note: All inline mixes begin with an
+                        OR bar; since %rendition-plus; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % role-elements
+                        "| %all-phrase;"                             >
+
+<!--                    SELF-URI ELEMENTS                          -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <self-uri> element                     -->
+<!ENTITY % self-uri-elements
+                        "| %all-phrase;"                             >
+
+
+
+<!--                    SIGNATURE BLOCK ELEMENTS                   -->
+<!--                    Elements to be mixed with data characters
+                        inside the content model for the
+                        <sig-block> element.                       -->
+<!ENTITY % sig-block-elements
+                        "| %all-phrase; | %break.class; |
+                         %contrib.class; |
+                         %just-base-display-noalt.class; |
+                         %person-group-info.class; | %sig.class;"    >
+
+
+<!--                    SIGNATURE ELEMENTS                         -->
+<!--                    Elements to be mixed with data characters
+                        inside the content model for the
+                        <sig> element.                             -->
+<!ENTITY % sig-elements "| %all-phrase; | %break.class; |
+                         %just-base-display-noalt.class;"            >
+
+
+<!--                    SIZE ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the size element.                          -->
+<!ENTITY % size-elements
+                        "| %face-markup.class; | %x.class;"          >
+
+
+<!--                    SOURCE ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <source> element                       -->
+<!ENTITY % source-elements
+                        "| %all-phrase; | %break.class;"             >
+
+<!--                    SPEAKER ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a speaker.                                 -->
+<!ENTITY % speaker-elements
+                        "| %all-phrase; | %person-name.class;"       >
+
+
+<!--                    STANDARDS ORGANIZATION ELEMENTS            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <std-organization>.                        -->
+<!ENTITY % std-organization-elements 
+                        "| %all-phrase; | %institution-wrap.class; |
+                         %break.class;"                              >
+
+
+<!--                    STRING DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-date> element                  -->
+<!ENTITY % string-date-elements
+                        "| %all-phrase; | %date-parts.class;"        >
+
+
+<!--                    STRING NAME ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-name> element                  -->
+<!ENTITY % string-name-elements
+                        "| %all-phrase; | %person-name.class;"       >
+
+
+<!--                    STRUCTURAL TITLE ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <title> element                        -->
+<!ENTITY % struct-title-elements
+                        "| %all-phrase; | %break.class; |
+                         %citation.class;"                           >
+
+
+<!--                    STYLED CONTENT ELEMENTS                    -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <styled-content> element               -->
+<!ENTITY % styled-content-elements
+                        "| %all-phrase; |
+                         %block-display-noalt.class;|
+                         %block-math.class; | %list.class; |
+                         %rest-of-para.class;"                       >
+
+
+<!--                    SUBJECT GROUPING NAME ELEMENTS             -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <subject> element                          -->
+<!ENTITY % subject-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    DEFINITION LIST: TERM ELEMENTS             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <term>.                                  -->
+<!ENTITY % term-elements
+                        "| %all-phrase; | %block-math.class; |
+                         %chem-struct-wrap.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!--                    TEXTUAL FORM ELEMENTS                      -->
+<!--                    Model for the <textual-form> element.
+                        Added <label>                              -->
+<!ENTITY % textual-form-elements
+                        "| %emphasis.class; |
+                         %inline-display-noalt.class; |
+                         %label.class; | %math.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    TIME STAMP ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <time-stamp>.                            -->
+<!ENTITY % time-stamp-elements
+                        "| %date-parts.class; | %x.class;"           >
+
+
+<!--                    TITLE ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        title elements such as <title>, <subtitle>,
+                        <trans-title>, etc.                        -->
+<!ENTITY % title-elements
+                        "| %all-phrase; | %break.class;"             >
+
+
+<!--                    VERSE-LINE ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <verse-line>
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % verse-line-elements
+                        "%simple-text;"                              >
+
+
+<!--                    X ELEMENTS                                 -->
+<!--                    Elements for use inside the <x> element    -->
+<!ENTITY % x-elements   "| %emphasis.class; | 
+                           %inline-display-noalt.class; |
+                           %phrase-content.class; | %subsup.class; |
+                           %x.class;"                                >
+
+
+<!-- ============================================================= -->
+<!--                    RUBY MARKUP                                -->
+<!-- ============================================================= -->
+
+
+<!--                    RUBY BASE ELEMENTS                         -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Ruby Base <rb> 
+                        element.                                   -->
+<!ENTITY % rb-elements  "| %all-phrase;"                             >
+
+
+<!-- ============================================================= -->
+<!--                    DUPLICATES NEEDED FOR OVER-RIDES           -->
+<!--                    (models unchanged from common.ent but      -->
+<!--                     needed below)                             -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON ATTRIBUTES                          -->
+<!--                    These lists of attributes will be added to 
+                        nearly every element, in both the document 
+                        metadata and the document body, of the entire 
+                        Tag Set:
+                          - including table elements for both the 
+                              XHTML-inspired and OASIS-inspired
+                              table model elements
+                          - excluding only <mml:math> and 
+                              <xi:include> (whose namespaces JATS
+                              does not control).
+                           Great care should be taken to use these
+                        attributes judiciously, not as a shortcut to
+                        thinking through where an attribute should be
+                        used. Potential use cases include adding
+                        @xml:lang or some RDFa attribute to every 
+                        elements.                                  -->
+
+
+<!--                    JATS BASE ATTRIBUTES                       -->
+<!--                    Holds all the common attributes except @id.
+                        Used to keep the two common attribute lists 
+                        in sync. To add a global attribute, modify
+                        this list.                                 -->
+<!ENTITY % jats-base-atts
+            "xml:base   CDATA                             #IMPLIED"  >
+
+
+<!--                    JATS COMMON ATTRIBUTES                     -->
+<!--                    Holds all the common attributes, as defined in
+                        the base attribute parameter entity, plus an
+                        optional @id.                              -->
+<!ENTITY % jats-common-atts
+            "id         ID                                #IMPLIED 
+             %jats-base-atts;"                                       >
+
+
+<!--                    JATS COMMON ATTRIBUTES (ID REQUIRED)       -->
+<!--                    Holds all the common attributes, as defined in
+                        the base attribute parameter entity, plus a 
+                        required @id.                              -->
+<!ENTITY % jats-common-atts-id-required
+            "id         ID                                #REQUIRED
+             %jats-base-atts;"                                       >
+
+
+<!--                    MIGHT LINK XLINK ATTRIBUTES                -->
+<!--                    Used for elements which may need to link to
+                        external sources or other objects within
+                        the document, but may not necessarily act
+                        as a link at all.  The attribute
+                        "xlink:href" identifies the object to which
+                        the link points.                           -->
+<!ENTITY % might-link-atts
+            "xmlns:xlink CDATA                             #IMPLIED
+             xlink:type  (simple)                          #IMPLIED
+             xlink:href  CDATA                             #IMPLIED
+             xlink:role  CDATA                             #IMPLIED
+             xlink:title CDATA                             #IMPLIED
+             xlink:show  (embed | new | none | other | replace)
+                                                           #IMPLIED
+             xlink:actuate
+                         (none | onLoad | onRequest | other)
+                                                           #IMPLIED
+             hreflang    NMTOKEN                           #IMPLIED" >
+
+
+
+<!-- ============================================================= -->
+<!--                    SECTION OPTIONAL TITLE MODEL               -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTENT MODEL FOR AN UNTITLED SECTION      -->
+<!--                    The model for a section-like structure that
+                        may or may not have an initial title       -->
+<!ENTITY % sec-opt-title-model
+                        "(sec-meta?, label?, title?, (%para-level;)*,
+                          (%sec-level;)*,
+                          (%sec-back-matter-mix;)* )"                >
+
+
+<!-- ============================================================= -->
+<!--                    OVER-RIDES OF CONTENT MODELS (FULL MODELS) -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE METADATA MODEL                     -->
+<!--                    Content model for the metadata that is
+                        specific to the article.                   -->
+<!ENTITY % article-meta-model
+                       "(article-id*, (%article-version.class;)?,
+                         article-categories?, title-group?,
+                         (%contrib-group.class; |
+                          %aff-alternatives.class; | %x.class;)*,
+                         author-notes?,  ( (%pub-date.class;)* | 
+                          pub-date-not-available?), 
+                         volume*, volume-id*, volume-series?,
+                         issue*, issue-id*, 
+                         issue-title*, issue-title-group*, 
+                         issue-sponsor*, issue-part?, 
+                         volume-issue-group*, isbn*,
+                         supplement?,
+                         ( ( (fpage, lpage?)?, page-range?) |
+                           elocation-id )?,
+                         (%address-link.class; | product |
+                          supplementary-material)*,
+                         history?, pub-history?,
+                         permissions?, self-uri*,
+                         (%related-article.class;)*, 
+                         (%abstract.class;)*, trans-abstract*, 
+                         (%kwd-group.class;)*, 
+                         funding-group*, support-group*,                      
+                         conference*, counts?, 
+                         custom-meta-group?)"                        >
+
+
+<!--                    ADDRESS MODEL                              -->
+<!--                    Content model for the <address> element    -->
+<!ENTITY % address-model
+                        "(%address.class; | %address-link.class; |
+                          %label.class; | %x.class;)*"               >
+
+
+<!--                    APPENDIX MODEL                             -->
+<!--                    Content model for the <app> element. The
+                        section model already contains parentheses.
+                        Made initial <title> optional.             -->
+<!ENTITY % app-model    "(%sec-opt-title-model;, permissions?)"      >
+
+
+<!--                    AUTHOR NOTES MODEL                         -->
+<!--                    Content model for an <author-notes> element.
+                                                                   -->
+<!ENTITY % author-notes-model
+                        "(label?, title?,
+                          (%corresp.class; | %fn-link.class; |
+                           %just-para.class; | %x.class;)+ )"        >
+
+
+<!--                    CONFERENCE MODEL                           -->
+<!--                    Content model for the <conference> element -->
+<!ENTITY % conference-model
+                        "(%conference.class; | %x.class;)*"          >
+
+
+<!--                    CONTRIBUTOR GROUP MODEL                    -->
+<!--                    Content model for the <title-group> element-->
+<!ENTITY % contrib-group-model
+                        "(%contrib.class; | %contrib-info.class; |
+                          %x.class;)+"                               >
+
+
+<!--                    CONTRIBUTOR MODEL                          -->
+<!--                    Content model for the <contrib> element    -->
+<!ENTITY % contrib-model
+                        "(%contrib-id.class; | %name.class; |  
+                          %degree.class; | %contrib-info.class; |  
+                          %x.class;)* "                              >
+
+
+<!--                    DEFINITION LIST: DEFINITION ITEM MODEL     -->
+<!--                    Content model of a <def-item>              -->
+<!ENTITY % def-item-model
+                        "(label?, term*, (%def.class; | %x.class;)* )"
+                                                                     >
+
+<!--                    DEFINITION LIST MODEL                      -->
+<!--                    Content model for the <def-list> element   -->
+<!ENTITY % def-list-model
+                        "(label?, title?, term-head?, def-head?,
+                          (%def-item.class; | %x.class;)*, 
+                          (%def-list.class;)* )"                     >
+
+
+<!--                    FOOTNOTE GROUP MODEL                       -->
+<!--                    Content model for the <fn-group> element
+                        Added an <x> as alternative to <fn>.       -->
+<!ENTITY % fn-group-model
+                        "(label?, title?,
+                          (%fn-link.class; | %x.class;)+ )"          >
+
+
+<!--                    HISTORY MODEL                              -->
+<!--                    Content model for the <history> element    -->
+<!ENTITY % history-model
+                        "(#PCDATA %history-elements;)*"              >
+
+
+<!--                    KEYWORD GROUP MODEL                        -->
+<!--                    Content model for a <kwd-group> element    -->
+<!ENTITY % kwd-group-model
+                        "(label?, title?,
+                          ((%kwd.class; | %x.class;)+ |
+                           (%unstructured-kwd-group.class;)* ) )"    >
+
+
+<!--                    LIST MODEL                                 -->
+<!--                    Content model for the <list> element       -->
+<!ENTITY % list-model   "((%id.class;)*, label?, title?,
+                          (%list-item.class; | %x.class;)+ )"        >
+
+
+<!--                    PUBLICATION DATE MODEL                     -->
+<!--                    Content model for the element <pub-date>   -->
+<!ENTITY % pub-date-model
+                        "(%date-parts.class; | %string-date.class; |
+                          %x.class;)*"                               >
+
+
+<!--                    REFERENCE ITEM MODEL                       -->
+<!--                    Content model for the <ref> element        -->
+<!ENTITY % ref-model    "(label?, (%citation.class; | %note.class; |
+                          %x.class;)+ )"                             >
+
+
+<!--                    REFERENCE LIST MODEL                       -->
+<!--                    Content model for the <ref-list> element   -->
+<!ENTITY % ref-list-model
+                        "((%id.class;)*, label?, title?, 
+                          (%para-level; | %ref.class;)*,
+                          (%ref-list.class;)* )"                     >
+                          
+                          
+<!--                    RUBY WRAPPER Model                         -->
+<!--                    Content model for the <ruby> element       -->
+<!ENTITY % ruby-model   "(rb, (rt | (rp, rt, rp)) )"                 >
+
+
+<!--                    CONTENT MODEL FOR A STRUCTURAL SECTION     -->
+<!--                    The model for a Section <sec>              -->
+<!ENTITY % sec-model    "(sec-meta?, label?, title?,
+                          (%para-level;)*, (%sec-level;)*,
+                          (%sec-back-matter-mix;)* )"                >
+
+
+<!--                    TABLE WRAP FOOTER MODEL                    -->
+<!--                    Content model for the <table-wrap-foot>
+                        element                                    -->
+<!ENTITY % table-wrap-foot-model
+                        "(label?, title?,
+                          (%just-para.class; |  %fn-group.class; |
+                           %fn-link.class; |
+                           %display-back-matter.class; |
+                           %x.class;)+ )"                            >
+
+
+<!--                    TRANSLATED ABSTRACT MODEL                  -->
+<!--                    Content model for an <trans-abstract> element.
+                                                                   -->
+<!ENTITY % trans-abstract-model
+                        "((%id.class;)*, %sec-opt-title-model;)"     >
+
+
+<!-- ============================================================= -->
+<!--                    OVER-RIDES OF ATTRIBUTE LISTS              -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE IDENTIFIER ATTRIBUTES              -->
+<!--                    Attributes for the <article-id> element    -->
+<!ENTITY % article-id-atts
+            "%jats-common-atts;                                       
+             pub-id-type                
+                        CDATA                             #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+
+<!--                    DATE (HISTORICAL) ATTRIBUTES               -->
+<!ENTITY % date-atts
+            "%jats-common-atts;                                       
+             date-type  CDATA                             #IMPLIED
+             publication-format
+                        CDATA                             #IMPLIED
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    FUNDING STATEMENT ATTRIBUTES               -->
+<!--                    Attributes for the <funding-source> element-->
+<!ENTITY % funding-statement-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    INDEX-TERM ATTRIBUTES (BITS override)      -->
+<!--                    Attribute list for <index-term> element.
+                          The attribute @index-type names the
+                        specific indexes in which this term should
+                        be used. Contains the name of an index or 
+                        a space separated series of index names    -->
+<!ENTITY % index-term-atts
+           "%jats-common-atts;
+             index-type NMTOKENS                          #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SEE-ALSO ATTRIBUTES                        -->
+<!--                    Attribute list for <see-also> element.     -->
+<!ENTITY % see-also-atts
+           "%jats-common-atts;
+             rid        IDREFS                            #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED"  >
+ 
+
+<!--                    PUBLICATION IDENTIFIER ATTRIBUTES          -->
+<!--                    Attributes for the <pub-id> element        -->
+<!ENTITY % pub-id-atts
+            "%jats-common-atts;                                       
+             pub-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    X(CROSS) REFERENCE ATTRIBUTES              -->
+<!--                    Attribute list for cross references        -->
+<!ENTITY % xref-atts
+            "%jats-common-atts;                                       
+             ref-type   CDATA                             #IMPLIED                                             custom-type
+                        CDATA                             #IMPLIED
+             alt        CDATA                             #IMPLIED
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ================== End Archiving Content/ATT Over-rides ===== -->
diff --git a/dtd/JATS-archivecustom-modules1-3.ent b/dtd/JATS-archivecustom-modules1-3.ent
new file mode 100644
index 0000000..5a6205b
--- /dev/null
+++ b/dtd/JATS-archivecustom-modules1-3.ent
@@ -0,0 +1,404 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD-Specific Modules            -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD-Specific Modules v1.3 20210610//EN"
+     Delivered as file "JATS-archivecustom-modules1-3.ent"         -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Article Authoring and Interchange DTD of the      --> 
+<!--             JATS DTD Suite                                    -->         
+<!--                                                               -->
+<!-- PURPOSE:    To name any modules created explicitly for this   -->
+<!--             DTD, that is, not present in the JATS DTD Suite   -->
+<!--                                                               -->
+<!-- CONTAINS:   Full external Parameter Entity declarations       -->
+<!--             for all Journal Archiving DTD-Specific modules    -->
+<!--             used by this DTD. (Note: the modules are DECLARED -->
+<!--             in this module, but referenced [invoked] in the   -->
+<!--             Journal Archiving and Interchange DTD module.)    -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created from the JATS DTD Suite.     -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is      -->
+<!--             built from the JATS DTD Suite.                    -->
+<!--                                                               -->
+<!--             This DTD and the Suite are a continuation of      -->
+<!--             the work done by NCBI, Mulberry Technologies,     -->
+<!--             and Inera Inc. on the NLM Journal Archiving       -->
+<!--             and Interchange DTD Suite, which was originally   -->
+<!--             released in December, 2002.                       -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 15. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 14. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 13. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 12. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+  ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 11. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 10. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed. 
+     
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  9. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+  8. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  7. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  6. JATS became version "1.1d3" and "v1.1d3 20150301"
+    =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  5. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+  
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  4. Updated the public identifier to "v1.0 20120330//EN", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "1".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    CUSTOMIZATION MODULES DECLARED             -->
+<!-- ============================================================= -->
+
+
+<!--                    DTD-SPECIFIC CLASS CUSTOMIZATIONS MODULE   -->
+<!--                    Set up the Parameter Entities and element
+                        class definitions that will be used to
+                        over-ride some element classes in the
+                        DTD Suite.                                 -->
+<!ENTITY % archivecustom-classes.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD Customize Classes Module v1.3 20210610//EN"
+"JATS-archivecustom-classes1-3.ent"                                >
+
+
+<!--                    DTD-SPECIFIC MIX CUSTOMIZATIONS MODULE     -->
+<!--                    Set up the Parameter Entities and element
+                        mix definitions that will be used to
+                        over-ride some element mixes in the DTD
+                        Suite.                                     -->
+<!ENTITY % archivecustom-mixes.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD Customize Mixes Module v1.3 20210610//EN"
+"JATS-archivecustom-mixes1-3.ent"                                  >
+
+
+<!--                    DTD-SPECIFIC MODELS/ATTRIBUTES CUSTOMIZATIONS
+                        MODULE                                     -->
+<!--                    Set up the Parameter Entities for element-
+                        specific element groups, complete content
+                        models, and attribute list and value over-
+                        rides. These PEs will over-ride selected
+                        content models and attribute lists for the
+                        Journal JATS DTD Suite-->
+<!ENTITY % archivecustom-models.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Journal Archiving DTD Customize Content and Attributes Module v1.3 20210610//EN"
+"JATS-archivecustom-models1-3.ent"                                 >
+
+
+<!--                    NLM CITATION MODULE                        -->
+<!--                    The only new element created for the
+                        Publishing DTD, the highly structured NLM
+                        citation, to enforce a slightly loose version
+                        of an NLM-structured bibliographic reference.
+                        Sequence is enforced and interior punctuation
+                        is expected to be generated.               -->
+<!ENTITY % nlmcitation.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) NLM Citation v1.3 20210610//EN"
+"JATS-nlmcitation1-3.ent"                                          >
+
+
+<!-- =================== End Archive DTD Module of Modules ======= -->
diff --git a/dtd/JATS-articlemeta1-3.ent b/dtd/JATS-articlemeta1-3.ent
new file mode 100644
index 0000000..a1c5837
--- /dev/null
+++ b/dtd/JATS-articlemeta1-3.ent
@@ -0,0 +1,2552 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Article Metadata Elements                 -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Journal Article Metadata Elements v1.3 20210610//EN"
+     Delivered as file "JATS-articlemeta1-3.ent"                   -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements used to describe the journal   -->
+<!--             in which the journal article is published.        -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 55. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+         
+ 54. PROCESSING METADATA - A new container element was added as
+     a child of <article>, <sub-article>, and <response> to 
+     describe processing information to help determine the 
+     exact tagset flavor used by this document instance. 
+     (<processing-meta>)
+     Current contents of <processing-meta>:
+      - <restricted-by> - Names tighter schemas, subsets, or
+           Guidelines followed by this document.
+      - <extended-by> - Names extension or superset schemas
+           followed by this document, such as TaxPub.
+      - <custom-meta-group>
+     Several new attributes were added to describe more 
+     completely the flavor/version of JATS in which the 
+     document was composed:
+       - @tagset-family	 (JATS | BITS | STS)
+       - @base-tagset    (Archiving | Publishing | Authoring)
+       - @table-model	 (XHTML |OASIS-CALS | both | none)
+       - @mathml-version (MathML 2.0 | MathML 3.0)
+       - @dtd-version was also revised to be an optional
+           value list (still on <article>)
+       - math-representation - States the ways mathematical
+            expressions appear in this document. Values are 
+            an open, space-separated list, with values 
+            probably one or more of the following words:
+                mathml   tex   latex   images   plain-text 
+            For example, both TeX and images (tex  images)
+            For example, both MathML and TeX (mathml tex)
+            Attribute order is irrelevant. For no math at 
+            all, just skip this optional attribute.
+  
+ 53. EXPANSION OF FIXED ATTRIBUTES LIST: There are four  
+     content-defined attributes which are CDATA values 
+     (undetermined) in Archiving, but which are named value 
+     lists in Publishing/Authoring:
+       - @fn-type 
+       - @person-group-type
+       - @pub-id-type (set up in this module)
+       - @ref-type 
+     In order to give users of Publishing and Authoing
+     more flexibility to name new values without 
+     destroying the benefit of named value lists:
+       - A new value “custom” has been added to the named
+           value list of each of these four attributes.
+       - A new attribute @custom-type has been added to
+           each element that takes one of these attributes.
+     The new attribute @custom-type was also added to
+     Green, so that documents valid to Blue or Pumpkin 
+     would also be also valid to Green.
+     In this module:
+      - The element <article-id> was given the new 
+        attribute @custom-type and "custom" was added to
+        %pub-id-types (defined in the common module).
+     The Best Practice rule (unenforceable in DTDs, but  
+     enforceable in Schematron) is, that if you use the 
+     value “custom” from one of these lists, you should 
+     also record what type of 'custom' in the 
+     @custom-type attribute.                        
+    
+ 52. ISSUE SUBTITLE - Added <issue-subtitle> to 
+     <issue-title-group> optional and repeatable
+
+ 51. ADDED ISSUE TITLE GROUP container element, for associating
+     issue titles, subtitles, and translated titles, when there
+     is more than one <issue>.
+
+ 50. ADDED <issue-title-group> added to <article-meta>
+     (optional, repeatable)
+
+ 49. ASSIGNING AUTHORITY - Added @assigning-authority to the
+     following elements, so that the type-of-identifier and
+     the party-responsible-for-identifier could both be
+     recorded.     
+        - <self-uri>
+        - <pub-date>
+ 
+ 48. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 47. ASSIGNING AUTHORITY - Added @assigning-authority to the
+     following elements, so that the type-of-identifier and
+     the party-responsible-for-identifier could both be
+     recorded.     
+        - article-id
+        - article-version
+        - award-id
+        - compound-kwd
+        - compound-subject
+        - kwd 
+        - kwd-group
+        - nested-kwd
+        - subject
+        - subject-group
+        - unstructured-kwd-group
+        - Note: <pub-id> already had @assigning-authority
+ 
+ 46. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote)
+    ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 45. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 44. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 43. PUB-ID-TYPE - @pub-id-type changed back to a fixed list from 
+     CDATA, reversing the decision of Version 1.2d1. Although 
+     the value list is unchanged, best practice will be documented
+     as using @pub-id-type for type and @assigning-authority
+     for the responsible agency.
+       - for <article-id>
+
+ 42. ASSIGNING AUTHORITY - Added @assigning-authority to the
+     following elements, so that the type-of-identifier and
+     the party-responsible-for-identifier could both be
+     recorded. Previously, these values were both assigned to
+     the attribute @pub-id-type.
+         - <article-id>
+
+ 41. NON-MONETARY SUPPORT - Inside <article-meta> added new
+     <support-group> to hold both funding and
+     non-monetary support descriptions. <support-group> is 
+     both a peer to <funding-group> (backward compatibility)
+     and contains <funding-group>.
+ 
+ 40. PUBLICATION DATE-NOT-AVAILABLE - Inside <article-meta>, 
+     <front-stub>, <event>, and <event-desc>
+     added new element <pub-date-not-available>, as an 
+     alternative to <pub-date>. The meaning is that a 
+     publication date was (for whatever reason) not available. 
+     Presence of the element says nothing about publication 
+     status.
+   
+ 39. VOCABULARY/TAXONOMY ATTRIBUTES - Added 2 new attributes for
+     naming (and possibly linking to) general or controlled
+     taxonomy, vocabulary, index, database or other source of
+     terms (@vocab, and @vocab-identifier) to these
+     elements (which could already take the attributes
+     @vocab-term and @vocab-term-identifier):
+        - <kwd>
+        - <compound-kwd>
+        - <nested-kwd>
+        - <subject>
+        - <compound-subject>
+
+ 38. BITS "2.0" and "v2.0 20151225" remains unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 37. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 36. EVENTS - 
+      - Added <event>, which will reside only inside
+        <pub-history>. 
+      - Added <pub-history> to hold <event>s. Unlike in BITS, 
+        <pub-history> will contain ONLY <event>s.
+      - Took <event> attributes from BITS. 
+      - Added <article-version> to model of <event>.
+  
+ 35. PUB-ID-TYPE - @pub-id-type changed from a fixed list to
+     CDATA for all usages of the attribute.
+
+ 34. ARTICLE META MODEL
+     - NO DATE - <pub-date> (optional repeatable) is now
+       followed by the optional new element 
+       <pub-date-not-available>. 
+
+     - ARTICLE VERSION - Added new element <article-version>
+       inside <article-meta> to hold one version number for  
+       the article. <article-version> element may repeat inside
+       new element <article-version-alternatives> to hold 
+       version numbers for this article from different systems.
+ 
+     - PUBLICATION HISTORY - Added new element based on BITS,
+       <pub-history>, to hold <event>s as <history> holds
+       <date>s. New internal elements: <event>, <event-desc>
+   
+ 33. VOCABULARY/TAXONOMY ATTRIBUTES - Added 4 new attributes for
+     naming (and possibly linking to) a general or controlled
+     taxonomy, vocabulary, index, database or other source of
+     terms: @vocab, @vocab-identifier, @vocab-term, and
+     @vocab-term-identifier
+
+      - Attributes @vocab and @vocab-identifier were 
+        added to the elements:
+        - <kwd-group>
+        - <subj-group>
+        - <unstructured-kwd-group>
+
+      - Attributes @vocab-term and @vocab-term-identifier were
+        added to the elements:
+        - <kwd>
+        - <compound-kwd>
+        - <nested-kwd>
+        - <subject>
+        - <compound-subject>
+ 
+ 32. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 31. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 30. JATS became version "1.1d3" and "v1.1d3 20150301"
+  
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+ 
+ 29. <VOLUME> INSIDE <ARTICLE-META>
+
+   - Allowed <volume> to repeat inside <article-meta>, the types to 
+     be distinguished using @content-type
+
+   - Added new optional element <volume-issue-group> inside 
+     <article-meta) following all volume and issue elements
+     to hold volume-issue pairs (or n-tuples) when a second
+     and subsequent <volume> has its own related issue
+     information.
+
+   - Made <issue> repeatable, for those who choose not to use
+     the new wrapper element.
+   
+ 28. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 27. NEW <era> ELEMENT
+     Added <era> through date-model
+      - <pub-date>
+
+ 26. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added a new attribute list to:
+      - article-categories
+      - article-meta
+      - counts
+      - history
+      - title-group                          
+
+ 25. ABSTRACTS AND KEYWORDS
+       Changed "abstract*" to "(%abstract.class;)*"
+       and "kwd-group*" to "(%kwd-group.class;)*" since those
+       classes now exist. Elements should have a limited number of
+       ways to be invoked.
+        - article-meta (through %article-meta-model;)
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+ 24. RELATED OBJECT - Added <related-object> everywhere
+     <related-article> was used, including inside 
+     <article-meta> using article-meta-model.
+
+ 23. CONTRIB-GROUP AND CONTRIB MODULE SHIFT - Moved <contrib>
+     and <contrib-group> to common.ent, since they are now used
+     in both article metadata and journal metadata.
+
+ 22. CONTRIBUTOR MODEL - Added "contrib-id.class" to the beginning
+     at the <contrib> model, to hold identifiers for people,
+     such as publishers-specific IDs, ORCIDs, and JST and NII 
+     identifiers.
+   
+ 21. COUNTS - Generic <count> element added to the <counts>
+     wrapper. This element is allowed to repeat, to count
+     anything a publisher or archive may wish to count.
+     The @count-type attribute will name what is being counted
+     (such as figures, tables, sections, contributors, images,
+     etc.) The @count attribute will state how many of the 
+     objects are in the document.
+     
+     Although a publisher or archive could choose to label
+     all the counted objects in a document this way, the
+     specific count elements (fig-count, equation-count,
+     word-count, etc.) will be retained for backwards
+     compatibility.
+     
+     New parameter entities: count-atts.
+   
+ 20. PUBLICATION DATE ATTRIBUTES - Added to the attributes for
+     <pub-date> (through @pub-date-atts):
+       a) @iso-8601-date - ISO 8601 standard date format
+          of the publication date. Format  YYYY-MM-DDThh:mm:ss 
+       b) @calendar - Name of the calendar used (@calendar) in
+          naming this publication date (such as "Gregorian", 
+          "Japanese" (Emperor years), or "Islamic").
+       c) @date-type to record lifecycle information as to which
+          publication date is involved (such as retracted, corrected,
+          preprint).
+       d) @publication-format to hold what format or media was 
+          published on this date (such as "print" or
+          "electronic").
+       e) @xml:lang (comments below said was this added for 0.4).
+   
+ 19. COMPOUND KEYWORD PARTS - Allowed the individual compound 
+     keyword parts (<compound-kwd-part> to be as complex as 
+     ordinary keywords <kwd>), by giving them the same model 
+     as <kwd>.
+   
+ 18. NESTED KEYWORDS - Added new keyword type element for nested
+     keywords (<nested-kwd>), to hold hierarchical keywords such
+     as taxonomic structures. New PEs %nested-kwd-model  and
+     %nested-kwd-atts 
+   
+ 17. MODULE MOVEMENT (from increased reference content)
+
+     a) Element <degrees> - Moved <degrees> and its parameter
+        entities from this module from JATS-common.ent.
+   
+     b) Element <supplement> - Moved <supplement> and its parameter
+        entities from this module from JATS-common.ent.
+   
+     c) Element <conf-sponsor> - Moved <conf-sponsor> and its parameter
+        entities from this module from JATS-common.ent.
+   
+     d) Element <on-behalf-of> - Moved <on-behalf-of> and its parameter
+        entities from this module from JATS-common.ent.
+   
+ 16. Added name comment to %counts-model;
+
+ 15. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+ 14. Updated the DTD-version attribute to "0.4" 
+   
+ 13. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+ 12. UNSTRUCTURED KEYWORD GROUP ATTRIBUTES - Made
+     %unstructured-kwd-group-atts; into its own PE, as
+     documentation stated had already been done.
+
+ 11. KEYWORD ATTRIBUTES - To make the tag set more consistent,
+     added @content-type to <kwd>, since <compound-kwd> already
+     took this attribute. Through %kwd-atts;
+
+ 10. I18N - At the request of the SBJ Working Group (Japan)
+     made <series-text> repeatable inside <article-categories> using
+     %article-categories-model;
+
+  9. TITLE ELEMENTS - Removed the dependency which had both
+     <subtitle> and <alt-title> modeled with the same parameter
+     entity %title-elements;. Created new PEs for each element
+     but set them (as the default) to %title-elements so that no
+     customization would break. Models changed:
+       - alt-title    %alt-title-elements; defined in common.ent
+       - subtitle     %subtitle-elements; (moved to this
+           module)
+
+  8. AFFILIATION ALTERNATIVES - Added the element <aff-alternatives>
+     to <article-meta> through %article meta-model;. This element
+     will hold multiple <aff>s that are a representation of a
+     single affiliation, for example, the name of an institution
+     in two languages or two scripts.
+
+  7. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+      - alt-title through alt-title-atts (both)
+      - article-id through article-id-atts (@specific-use only)
+      - author-comment through author-comment-atts (both)
+      - author-notes through author-notes-atts (both)
+      - article-id through article-id-atts (@xml:lang)
+      - contrib through contrib-atts (@specific-use only)
+      - contrib-group through contrib-group-atts (@xml:lang)
+      - corresp through corresp-atts (@specific-use)
+      - degrees through degrees-atts (both)
+      - kwd-group through kwd-group-atts (@specific-use only
+             @xml:lang already there)
+      - on-behalf-of through on-behalf-of-atts (both) NEW PE
+      - product through product-atts (both)
+      - pub-date through pub-date-atts (@xml:lang)
+      - self-uri through self-uri-atts (both)
+      - series-text through series-text-atts (both)
+      - series-title through series-title-atts (both)
+      - string-conf through string-conf-atts (both)
+      - subj-group through subj-group-atts (both)
+      - subtitle through subtitle-atts (@specific only
+             @xml:lang already there)
+      - supplement through supplement-atts (both)
+
+  6. TITLE ELEMENTS - Removed the dependency which had both
+     <subtitle> and <alt-title> modeled with the same parameter
+     entity %title-elements;. Created new PEs for each element
+     but set them (as the default) to %title-elements so that no
+     customization would break.
+
+  5. COUNT ATTRIBUTES - Removed the dependency which had all of
+     the count elements using a single attribute list (%count-atts;)
+     Created new attributes list PEs for each of them: equation-count,
+     fig-count, page-count, ref-count, table-count, and word-count.
+     *****Customization Alert: New parameter entities could break
+     some customizations. Check the attribute list parameter entity
+     for each of the count elements. *****
+
+  4. COMPOUND SUBJECT - Created a new element <compound-subject>
+     that acts just like <compound-kwd>, in that it takes one or
+     more <compound-subject-part>s to allow a complex, multi-
+     part subject to be captured. New elements, attribute lists,
+     and parameter entities. (An example of a compound subject
+     is a code with a textual keyword (A11 Permeability).
+     Allowed <compound-subject> as an alternative to <subject>
+     inside a <subj-group>.
+
+  3. SERIES TEXT ATTRIBUTES - Both <series-title> and
+     <series-text> used to use the PE %series-title-atts;. Added the
+     PE %series-text-atts;, which is the only one <series-text>
+     uses. No documents need change.
+     *****Customization Alert: New parameter entity could break some
+     customizations. Check your <series-text> attributes. *****
+
+  2. TRANSLATED ABSTRACT ATTRIBUTES - Both <abstract> and
+     <trans-abstract> used to use the PE %abstract-atts;. Added the
+     PE %trans-abstract-atts;, which is the only one <trans-abstract>
+     uses. No documents need change.
+     *****Customization Alert: New parameter entity could break some
+     customizations. Check your <trans-abstract> attributes. *****
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    ABSTRACT ATTRIBUTES                        -->
+<!--                    Attributes for the <abstract> element      -->
+<!ENTITY % abstract-atts
+            "%jats-common-atts;                                       
+             abstract-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ALTERNATE TITLE ATTRIBUTES                 -->
+<!--                    Attributes for the <alt-title> element     -->
+<!ENTITY % alt-title-atts
+            "%jats-common-atts;                                       
+             alt-title-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ARTICLE CATEGORIES ATTRIBUTES              -->
+<!--                    Attributes for the <article-categories> 
+                        element                                    -->
+<!ENTITY % article-categories-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    ARTICLE METADATA ATTRIBUTES                -->
+<!--                    Attributes for the <article-meta> element  -->
+<!ENTITY % article-meta-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    ARTICLE VERSION ATTRIBUTES                 -->
+<!--                    Attributes for the <article-version> 
+                        element                                    -->
+<!ENTITY % article-version-atts
+            "%jats-common-atts;                                       
+             article-version-type
+                        CDATA                             #IMPLIED
+             designator CDATA                             #IMPLIED
+             assigning-authority
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    ARTICLE VERSION ALTERNATIVE ATTRIBUTES     -->
+<!--                    Attributes for the 
+                        <article-version-alternatives> element     -->
+<!ENTITY % article-version-alternatives-atts
+            "%jats-common-atts;"                                     >
+
+
+
+<!--                    AUTHOR COMMENT ATTRIBUTES                  -->
+<!--                    Attributes for the <author-comment> element-->
+<!ENTITY % author-comment-atts
+            "%jats-common-atts;                                       
+             content-type
+                       CDATA                              #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    AUTHOR NOTES ATTRIBUTES                    -->
+<!--                    Attributes for the <author-notes> element  -->
+<!ENTITY % author-notes-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ARTICLE IDENTIFIER ATTRIBUTES              -->
+<!--                    Attributes for the <article-id> element    -->
+<!ENTITY % article-id-atts
+            "%jats-common-atts;                                       
+             pub-id-type
+                        (%pub-id-types;)                  #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    COMPOUND KEYWORD ATTRIBUTES                -->
+<!--                    Attributes for the <compound-kwd> element
+                                                                   -->
+<!ENTITY % compound-kwd-atts
+            "%jats-common-atts;
+             assigning-authority
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    COMPOUND KEYWORD PART ATTRIBUTES           -->
+<!--                    Attributes for the <compound-kwd-part>
+                        element                                    -->
+<!ENTITY % compound-kwd-part-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    COMPOUND SUBJECT ATTRIBUTES                -->
+<!--                    Attributes for the <compound-subject> element
+                                                                   -->
+<!ENTITY % compound-subject-atts
+            "%jats-common-atts;
+             assigning-authority
+                        CDATA                             #IMPLIED                                        
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    COMPOUND SUBJECT PART ATTRIBUTES           -->
+<!--                    Attributes for the <compound-subject-part>
+                        element                                    -->
+<!ENTITY % compound-subject-part-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    CONFERENCE ACRONYM ATTRIBUTES              -->
+<!--                    Attributes for the <conf-acronym> element  -->
+<!ENTITY % conf-acronym-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONFERENCE NUMBER ATTRIBUTES               -->
+<!--                    Attributes for the <conf-num> element      -->
+<!ENTITY % conf-num-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONFERENCE THEME ATTRIBUTES                -->
+<!--                    Attributes for the <conf-theme> element    -->
+<!ENTITY % conf-theme-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONFERENCE ATTRIBUTES                      -->
+<!--                    Attributes for the <conference> element    -->
+<!ENTITY % conference-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    CORRESPONDING ATTRIBUTES                   -->
+<!--                    Attributes for the <corresp> element       -->
+<!ENTITY % corresp-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    COUNT ATTRIBUTES                           -->
+<!--                    Attributes for the <count> element         -->
+<!ENTITY % count-atts
+            "%jats-common-atts;                                       
+             count-type CDATA                             #REQUIRED 
+             count      NMTOKEN                           #REQUIRED" >
+
+
+<!--                    COUNTS ATTRIBUTES                          -->
+<!--                    Attributes for the <counts> element        -->
+<!ENTITY % counts-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    DATE NOT AVAILABLE ATTRIBUTES              -->
+<!--                    Attributes for the <pub-date-not-available> 
+                        element                                    -->
+<!ENTITY % pub-date-not-available-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    EQUATION COUNT ATTRIBUTES                  -->
+<!--                    Attributes for the <equation-count> element-->
+<!ENTITY % equation-count-atts
+            "%jats-common-atts;                                       
+             count      NMTOKEN                          #REQUIRED"  >
+
+<!--                    PUBLICATION EVENT ATTRIBUTES               -->
+<!--                    Attributes for the <event> element         -->
+<!ENTITY % event-atts
+           "%jats-common-atts;
+             event-type CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    EVENT DESCRIPTION ATTRIBUTES               -->
+<!--                    Attributes used with the <event-desc>
+                        element.                                   -->
+<!ENTITY % event-desc-atts
+           "%jats-common-atts;
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    EXTENDED BY ATTRIBUTES                     -->
+<!--                    Attributes for the <extended-by> element   -->
+<!ENTITY % extended-by-atts
+            "%jats-common-atts;                                       
+             assigning-authority
+                        CDATA                             #IMPLIED
+             designator CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    FIGURE COUNT ATTRIBUTES                    -->
+<!--                    Attributes for the <fig-count> element     -->
+<!ENTITY % fig-count-atts
+            "%jats-common-atts;                                       
+             count      NMTOKEN                           #REQUIRED" >
+
+
+<!--                    HISTORY ATTRIBUTES                         -->
+<!--                    Attributes for the <history> element       -->
+<!ENTITY % history-atts
+            "%jats-common-atts;"                                     >
+
+<!--                    ISSUE TITLE GROUP ATTRIBUTES               -->
+<!--                    Attributes for the <issue-title-group> 
+                        element                                    -->
+<!ENTITY % issue-title-group-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+             
+
+<!--                    KEYWORD ATTRIBUTES                         -->
+<!--                    Attributes for the <kwd> element           -->
+<!ENTITY % kwd-atts
+            "%jats-common-atts;
+             assigning-authority
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    KEYWORD GROUP ATTRIBUTES                   -->
+<!--                    Attributes for the <kwd-group> element     -->
+<!ENTITY % kwd-group-atts
+            "%jats-common-atts;                                       
+             kwd-group-type
+                        CDATA                             #IMPLIED
+             assigning-authority
+                        CDATA                             #IMPLIED  
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    NESTED KEYWORD ATTRIBUTES                  -->
+<!--                    Attributes for the <nested-kwd> element    -->
+<!ENTITY % nested-kwd-atts
+            "%jats-common-atts;
+             assigning-authority
+                        CDATA                             #IMPLIED                                       
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                       CDATA                             #IMPLIED"  >
+
+
+<!--                    PAGE COUNT ATTRIBUTES                      -->
+<!--                    Attributes for the <page-count> element    -->
+<!ENTITY % page-count-atts
+            "%jats-common-atts;                                       
+             count      NMTOKEN                           #REQUIRED" >
+
+
+<!--                    PROCESSING METADATA CONTAINER ATTRIBUTES   -->
+<!--                    Attributes for the <processing-meta>
+                        element                                    -->
+<!ENTITY % processing-meta-atts
+            "%jats-common-atts;
+             tagset-family
+                        (jats | bits | sts)               #IMPLIED
+             base-tagset 
+                        (publishing | archiving | authoring)   
+                                                          #IMPLIED
+             table-model
+                        (xhtml | oasis | both | none)     #IMPLIED
+             math-representation
+                        NMTOKENS                          #IMPLIED
+             mathml-version
+                        (2.0 | 3.0)                       #IMPLIED"  >
+             
+             
+<!--                    PRODUCT ATTRIBUTES                         -->
+<!--                    Attributes for the <product> element       -->
+<!ENTITY % product-atts
+            "%jats-common-atts;                                       
+             product-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    PUBLICATION DATE ATTRIBUTES                -->
+<!--                    Attributes for the <pub-date> element      -->
+<!ENTITY % pub-date-atts
+            "%jats-common-atts;                                       
+             pub-type   CDATA                             #IMPLIED
+             publication-format
+                        CDATA                             #IMPLIED
+             assigning-authority
+                        CDATA                             #IMPLIED
+             date-type  CDATA                             #IMPLIED
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PUBLICATION HISTORY ATTRIBUTES             -->
+<!--                    Attributes for the <pub-history> element   -->
+<!ENTITY % pub-history-atts
+           "%jats-common-atts;"                                      >
+
+
+<!--                    REFERENCE (CITATION) COUNT ATTRIBUTES      -->
+<!--                    Attributes for the <ref-count> element     -->
+<!ENTITY % ref-count-atts
+            "%jats-common-atts;                                       
+             count      NMTOKEN                           #REQUIRED" >
+
+
+<!--                    RESTRICTED BY ATTRIBUTES                   -->
+<!--                    Attributes for the <restricted-by> element -->
+<!ENTITY % restricted-by-atts
+            "%jats-common-atts; 
+             assigning-authority
+                        CDATA                             #IMPLIED
+             designator CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    SELF URI ATTRIBUTES                        -->
+<!--                    Attributes for the <self-uri> element      -->
+<!ENTITY % self-uri-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    SERIES TEXT ATTRIBUTES                     -->
+<!--                    Attributes for the <series-text> element   -->
+<!ENTITY % series-text-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SERIES TITLE ATTRIBUTES                    -->
+<!--                    Attributes for the <series-title> element  -->
+<!ENTITY % series-title-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STRING CONFERENCE ATTRIBUTES               -->
+<!--                    Attributes for the <string-conf> element   -->
+<!ENTITY % string-conf-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SUBJECT GROUP ATTRIBUTES                   -->
+<!--                    Attributes for the <subj-group> element    -->
+<!ENTITY % subj-group-atts
+            "%jats-common-atts;                                       
+             subj-group-type
+                        CDATA                             #IMPLIED
+             assigning-authority
+                        CDATA                             #IMPLIED 
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+<!--                    SUBJECT ATTRIBUTES                         -->
+<!--                    Attributes for the <subject> element       -->
+<!ENTITY % subject-atts
+            "%jats-common-atts;
+             assigning-authority
+                        CDATA                             #IMPLIED                                        
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SUBTITLE ATTRIBUTES                        -->
+<!--                    Attributes for the <subtitle> element      -->
+<!ENTITY % subtitle-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    TABLE COUNT ATTRIBUTES                     -->
+<!--                    Attributes for the <table-count> element   -->
+<!ENTITY % table-count-atts
+            "%jats-common-atts;                                       
+             count      NMTOKEN                           #REQUIRED" >
+
+
+<!--                    TITLE GROUP ATTRIBUTES                     -->
+<!--                    Attributes for the <title-group> element   -->
+<!ENTITY % title-group-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    TRANSLATED ABSTRACT ATTRIBUTES             -->
+<!--                    Attributes for the <trans-abstract> element-->
+<!ENTITY % trans-abstract-atts
+            "%jats-common-atts;                                       
+             abstract-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    UNSTRUCTURED KEYWORD GROUP ATTRIBUTES      -->
+<!--                    Attributes for the <unstructured-kwd-group>
+                                                       element     -->
+<!ENTITY % unstructured-kwd-group-atts
+            "%jats-common-atts;
+             assigning-authority
+                        CDATA                             #IMPLIED 
+             kwd-group-type
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED 
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    WORD COUNT ATTRIBUTES                      -->
+<!--                    Attributes for the <word-count> element    -->
+<!ENTITY % word-count-atts
+            "%jats-common-atts;                                       
+             count      NMTOKEN                           #REQUIRED" >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA                           -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE METADATA MODEL                     -->
+<!--                    Complete content model for the <article-meta>
+                        element, which names the journal article
+                        metadata                                   -->
+<!ENTITY % article-meta-model
+                       "(article-id*, (%article-version.class;)?, 
+                         article-categories?, title-group?,
+                         ( %contrib-group.class; |
+                           %aff-alternatives.class;)*,
+                         author-notes?,  ( (%pub-date.class;)* | 
+                         pub-date-not-available?), 
+                         volume*, volume-id*, volume-series?,
+                         issue*, issue-id*, 
+                         issue-title*, issue-title-group*, 
+                         issue-sponsor*, issue-part?, 
+                         volume-issue-group*, isbn*,
+                         supplement?,
+                         ( (fpage, lpage?, page-range?) |
+                            elocation-id )?,
+                         (%address-link.class; | product |
+                          supplementary-material)*,
+                         history?, pub-history?, permissions?, 
+                         self-uri*, (%related-article.class;)*, 
+                         (%abstract.class;)*,
+                         trans-abstract*, (%kwd-group.class;)*, 
+                         funding-group*, support-group*,   
+                         conference*, counts?, 
+                         custom-meta-group?)"                        >
+
+
+<!--                    ARTICLE METADATA                           -->
+<!--                    Metadata that identifies this article, for
+                        example, bibliographic information such as
+                        the title, author, and copyright year.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article-meta
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=article-meta
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=article-meta
+                                                                   -->
+<!ELEMENT  article-meta %article-meta-model;                         >
+<!ATTLIST  article-meta
+             %article-meta-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE IDENTIFIER                         -->
+<!--                    Optional element, used to hold one of the
+                        "unique identifiers" that have been assigned
+                        at various times to an article.  Such
+                        identifiers may come from a publisher, a
+                        jobber, from PubMed Central, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=article-id
+                                                                   -->
+<!ELEMENT  article-id   (#PCDATA)                                    >
+<!ATTLIST  article-id
+             %article-id-atts;                                       >
+
+
+<!--                    ARTICLE VERSION                            -->
+<!--                    Optional element, used to hold one of the
+                        "version" identifiers (such as version type, 
+                        version status, version statement, or version
+                        number) that have been assigned to the 
+                        current article. 
+                        Remarks: A typical version identifier might 
+                        use terminology from the NISO Journal Article 
+                        Versions Recommendations (such as "preprint"
+                        or "copy-of-record", but it might also be a
+                        publishers internal versioning number such as
+                        "0.9".
+                           The element is allowed to repeat inside a
+                        <article-version-alternatives> element to hold
+                         version numbers from more than one versioning
+                         system. A given article should only be a
+                         single version in any given system.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article-version
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=article-version
+                                                                   -->
+<!ELEMENT  article-version
+                        (#PCDATA)                                    >
+<!ATTLIST  article-version
+             %article-version-atts;                                  >
+
+
+<!--                    ARTICLE VERSION ALTERNATIVES               -->
+<!--                    Container element to hold multiple
+                        <article-version> elements, when the version
+                        number/identifier for more than one system
+                        needs to be recorded. A given article should
+                        only be a single version in any given system.
+                        Details at:              
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article-version-alternatives
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=article-version-alternatives 
+                                                                   -->
+<!ELEMENT  article-version-alternatives
+                        (article-version+)                           >
+<!ATTLIST  article-version-alternatives
+             %article-version-alternatives-atts;                     >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE GROUPING DATA (ARTICLE METADATA)   -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE CATEGORIES MODEL                   -->
+<!--                    Complete content model for the
+                        <article-categories> element               -->
+<!ENTITY % article-categories-model
+                        "(subj-group*, series-title*, series-text*)" >
+
+
+<!--                    ARTICLE GROUPING DATA                      -->
+<!--                    Container for elements that may be used to
+                        group articles into related clusters
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article-categories
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=article-categories
+                                                                   -->
+<!ELEMENT  article-categories
+                        %article-categories-model;                   >
+<!ATTLIST  article-categories
+             %article-categories-atts;                               >
+
+
+<!--                    SUBJECT GROUP MODEL                        -->
+<!--                    Complete content model for the <subj-group>
+                        element                                    -->
+<!ENTITY % subj-group-model
+                        "((subject | compound-subject)+, subj-group*)"
+                                                                     >
+
+
+<!--                    GROUPING ARTICLES IN TITLED CATEGORIES
+                        Container element that collects multiple
+                        subjects and/or hierarchically lower subject
+                        groups.
+                        Remarks: For some journals, articles are
+                        grouped into categories, with the category
+                        indicated in the article's display.
+                        Sometimes the grouping or category refers
+                        to the type of article, such as "Essay",
+                        "Commentary", or "Article".  Sometimes the
+                        grouping refers to subject areas, such as
+                        "Physical Sciences", "Biological Sciences",
+                        or "Social Sciences".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=subj-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=subj-group
+                                                                   -->
+<!ELEMENT  subj-group   %subj-group-model;                           >
+<!ATTLIST  subj-group
+             %subj-group-atts;                                       >
+
+
+<!--                    SUBJECT ELEMENTS                           -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <subject> element                          -->
+<!ENTITY % subject-elements
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    SUBJECT NAME                               -->
+<!--                    The name of one of the subject groups used
+                        to describe an article.  Such groups are
+                        used, typically, to provide headings for
+                        groups of articles in a printed or online
+                        generated Table of Contents.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=subject
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=subject
+                                                                   -->
+<!ELEMENT  subject      (#PCDATA %subject-elements;)*                >
+<!ATTLIST  subject
+             %subject-atts;                                          >
+
+
+<!--                    COMPOUND SUBJECT MODEL                     -->
+<!--                    Complete content model for the
+                        <compound-subject> element                 -->
+<!ENTITY % compound-subject-model
+                        "(compound-subject-part+)"                   >
+
+
+<!--                    COMPOUND SUBJECT NAME                      -->
+<!--                    Container element to hold all the parts of a
+                        multi-part subject, for example, a subject that
+                        is comprised of both a term and a code value
+                        that represents that term.
+                        Related Elements: If a subject is only a word
+                        or phrase (Neuroscience, Physical Sciences),
+                        the simple <subject> element can be used to
+                        capture this information. If a subject is
+                        logically both a term and a code
+                        (A11 Permeability) but only one of those
+                        objects needs to be captured, a <subject>
+                        element may also be used. If it is useful to
+                        record both the code and the term, they can
+                        each be captured as one
+                        <compound-subject-part>s inside a
+                        <compound-subject>.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=compound-subject
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=compound-subject
+                                                                   -->
+<!ELEMENT  compound-subject
+                        %compound-subject-model;                     >
+<!ATTLIST  compound-subject
+             %compound-subject-atts;                                 >
+
+
+<!--                    COMPOUND SUBJECT PART ELEMENTS             -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <compound-subject> element                 -->
+<!ENTITY % compound-subject-part-elements
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    COMPOUND SUBJECT PART NAME                 -->
+<!--                    The name of one of the subject groups used
+                        to describe an article, when that article is
+                        a multi-part rather than a simple subject.
+                        Such groups are used, typically, to provide
+                        headings for groups of articles in a printed
+                        or online generated Table of Contents. The
+                        @content type attribute should be used to
+                        indicate the type of part ("text", "code",
+                        "sponsor", etc.).
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=compound-subject-part
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=compound-subject-part
+                                                                   -->
+<!ELEMENT  compound-subject-part
+                        (#PCDATA %compound-subject-part-elements;)*  >
+<!ATTLIST  compound-subject-part
+             %compound-subject-part-atts;                            >
+
+
+<!-- ============================================================= -->
+<!--                    SERIES INFORMATION                         -->
+<!-- ============================================================= -->
+
+
+<!--                    GROUPING ARTICLES IN SERIES
+                        Series (as used in the <series-title> and
+                        <series-text> elements described below) is
+                        used in two different senses. Some issues of
+                        journals are part of a series and will have
+                        series information just as they have an
+                        issue number as part of the article metadata,
+                        to describe the issue of the journal in which
+                        the article is published.  The second usage
+                        is for groupings of articles within one
+                        issue of a journal. For example, in some
+                        journals, articles are grouped into a
+                        series such as "From the Cover" and
+                        identified as part of a series.
+                        The Series Title element names the series
+                        and the Series Text element provides textual
+                        description (if any) describing the series.-->
+
+
+<!--                    SERIES TITLE ELEMENTS                      -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <series-title> element                     -->
+<!ENTITY % series-title-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    SERIES TITLE                               -->
+<!--                    Title of the journal series (bibliographic
+                        meaning) or the title of a  series of
+                        articles internal to one issue of a journal
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=series-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=series-title
+                                                                   -->
+<!ELEMENT  series-title (#PCDATA %series-title-elements;)*           >
+<!ATTLIST  series-title
+             %series-title-atts;                                     >
+
+
+<!--                    SERIES TEXT ELEMENTS                       -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <series-text> element                      -->
+<!ENTITY % series-text-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    SERIES TEXT: HEADER TEXT to DESCRIBE       -->
+<!--                    Textual description of the series of articles
+                        that are named in a <series-title> element
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=series-text
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=series-text
+                                                                   -->
+<!ELEMENT  series-text  (#PCDATA %series-text-elements;)*            >
+<!ATTLIST  series-text
+             %series-text-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    TOP-LEVEL ARTICLE METADATA CONTINUED       -->
+<!-- ============================================================= -->
+
+
+<!--                    AUTHOR NOTES MODEL                         -->
+<!--                    Content model for an <author-notes> element.
+                                                                   -->
+<!ENTITY % author-notes-model
+                        "(label?, title?,
+                          (%corresp.class; | %fn-link.class; |
+                           %just-para.class;)+ )"                    >
+
+
+<!--                    AUTHOR NOTE GROUP                          -->
+<!--                    Footnotes to authors or notes about authors
+                        (and, potentially other contributors) are
+                        collected in the Author note group.
+                        References to these footnotes are made
+                        using the <xref> element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=author-notes
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=author-notes
+                                                                   -->
+<!ELEMENT  author-notes %author-notes-model;                         >
+<!ATTLIST  author-notes
+             %author-notes-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                 PRODUCT REVIEW INFORMATION (PRODUCT METADATA) -->
+<!-- ============================================================= -->
+
+
+<!--                    PRODUCT ELEMENTS                           -->
+<!--                    Elements that may be used inside the
+                        <product> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % product-elements
+                        "| %article-link.class; | %break.class; |
+                         %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %phrase.class; |
+                         %price.class; | %references.class; |
+                         %simple-link.class; | %subsup.class; "      >
+
+
+<!--                    PRODUCT INFORMATION                        -->
+<!--                    Used as a wrapper for metadata for a product
+                        (such as a book, software package, hardware
+                        component, web site, etc.) that is being
+                        reviewed.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=product
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=product
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=product
+                                                                   -->
+<!ELEMENT  product      (#PCDATA %product-elements;)*                >
+<!ATTLIST  product
+             %product-atts;                                          >
+
+
+<!-- ============================================================= -->
+<!--                    FURTHER METADATA ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!--                    SELF-URI ELEMENTS                          -->
+<!--                    Elements to be mixed with data characters
+                        inside the <self-uri> element              -->
+<!ENTITY % self-uri-elements
+                        ""                                           >
+
+
+<!--                    URI FOR THIS SAME ARTICLE ONLINE           -->
+<!--                    Sometimes an article is available in several
+                        forms, for example there is the version that
+                        was published in print and there is the same
+                        article (possibly expanded or with different
+                        graphics) available online.
+                           The URI (such as a URL) may be used as a
+                        live link, typically naming a web site or the
+                        element content may name the URL, e.g., and
+                        use the link attributes to hold the real link:
+                           <self-uri xlink:href="...">An expanded
+                           version of this article is available
+                           online</self-uri>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=self-uri
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=self-uri
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=self-uri
+                                                                   -->
+<!ELEMENT  self-uri     (#PCDATA %self-uri-elements;)*               >
+<!ATTLIST  self-uri
+             %self-uri-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    ABSTRACTS                                  -->
+<!-- ============================================================= -->
+
+
+<!--                    ABSTRACT MODEL                             -->
+<!--                    Content model for an <abstract> element    -->
+<!ENTITY % abstract-model
+                        "((%id.class;)*, %sec-opt-title-model;)"     >
+
+
+<!--                    ABSTRACT                                   -->
+<!--                    A short summation of the content of an
+                        article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=abstract
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=abstract
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=abstract
+                                                                   -->
+<!ELEMENT  abstract     %abstract-model;                             >
+<!ATTLIST  abstract
+             %abstract-atts;                                         >
+
+
+<!--                    TRANSLATED ABSTRACT MODEL                  -->
+<!--                    Content model for an <trans-abstract> element.
+                                                                   -->
+<!ENTITY % trans-abstract-model
+                        "%sec-opt-title-model;"                      >
+
+
+<!--                    TRANSLATED ABSTRACT                        -->
+<!--                    An abstract that has been translated into
+                        another language
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=trans-abstract
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=trans-abstract
+                                                                   -->
+<!ELEMENT  trans-abstract
+                        %trans-abstract-model;                       >
+<!ATTLIST  trans-abstract
+             %trans-abstract-atts;                                   >
+
+
+<!-- ============================================================= -->
+<!--                    KEYWORD ELEMENTS                           -->
+<!-- ============================================================= -->
+
+
+<!--                    KEYWORD GROUP MODEL                        -->
+<!--                    Content model for a <kwd-group> element    -->
+<!ENTITY % kwd-group-model
+                        "(label?, title?, (%kwd.class;)+ )"          >
+
+
+<!--                    KEYWORD GROUP                              -->
+<!--                    Container element for one set of keywords
+                        <kwd>s used to describe a document.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=kwd-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=kwd-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=kwd-group
+                                                                   -->
+<!ELEMENT  kwd-group    %kwd-group-model;                            >
+<!ATTLIST  kwd-group
+             %kwd-group-atts;                                        >
+
+
+<!--ELEM   title        Defined in %common.ent;                    -->
+
+
+<!--                    KEYWORD CONTENT ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a keyword.                                 -->
+<!ENTITY % kwd-elements
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; |
+                         %phrase-content.class; |
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!--                    KEYWORD                                    -->
+<!--                    One subject term, critical expression, key
+                        phrase, abbreviation, indexing word, etc.
+                        that is associated with the whole document
+                        and can be used for identification and
+                        indexing purposes.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=kwd
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=kwd
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=kwd
+                                                                   -->
+<!ELEMENT  kwd          (#PCDATA %kwd-elements;)*                    >
+<!ATTLIST  kwd
+             %kwd-atts;                                              >
+
+
+<!--                    COMPOUND KEYWORD MODEL                     -->
+<!--                    The content model of the <compound-kwd>
+                        element                                    -->
+<!ENTITY % compound-kwd-model
+                        "(compound-kwd-part+)"                       >
+
+
+<!--                    COMPOUND KEYWORD                           -->
+<!--                    Some keywords are simple, a text word or
+                        phrase; such keywords can be tagged using the
+                        <kwd> element. But other keywords are more
+                        complicated:
+                         - a code and a term
+                         - an abbreviation and its expansion
+                         - a hierarchical keyword that carries all
+                           the parts of its hierarchy (as index
+                           terms do)
+                        This element was created to handle these
+                        special cases.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=compound-kwd
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=compound-kwd
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=compound-kwd
+                                                                   -->
+<!ELEMENT  compound-kwd %compound-kwd-model;                         >
+<!ATTLIST  compound-kwd
+             %compound-kwd-atts;                                     >
+
+
+<!--                    COMPOUND KEYWORD PART ELEMENTS             -->
+<!--                    Elements to be mixed with data characters
+                        inside the <compound-kwd-part> element     -->
+<!ENTITY % compound-kwd-part-elements
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; |
+                         %phrase-content.class; |
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!--                    COMPOUND KEYWORD PART                      -->
+<!--                    This element was created to hold one
+                        component of a complex keyword, for example
+                        one for the code and one for the term.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=compound-kwd-part
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=compound-kwd-part
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=compound-kwd-part
+                                                                   -->
+<!ELEMENT  compound-kwd-part
+                        (#PCDATA %compound-kwd-part-elements;)*      >
+<!ATTLIST  compound-kwd-part
+             %compound-kwd-part-atts;                                >
+
+
+<!--                    NESTED KEYWORD MODEL                       -->
+<!--                    The content model of the <nested-kwd>
+                        element                                    -->
+<!ENTITY % nested-kwd-model
+                        "((%nested-kwd.class;)+, nested-kwd*)"       >
+
+
+<!--                    NESTED KEYWORD                             -->
+<!--                    Hierarchical or nested keyword, in which the
+                        levels of a taxonomy that describe the
+                        article can be described.                  -->
+<!ELEMENT  nested-kwd   %nested-kwd-model;                           >
+<!ATTLIST  nested-kwd
+            %nested-kwd-atts;                                        >
+
+
+<!--                    UNSTRUCTURED KEYWORD GROUP ELEMENTS        -->
+<!--                    Content model for a <kwd-group> element    -->
+<!ENTITY % unstructured-kwd-group-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    UNSTRUCTURED KEYWORD GROUP                 -->
+<!--                    Container element for one set of keywords
+                        used to describe a document where the
+                        individual keywords are not tagged as
+                        separate <kwd>s but instead are all run
+                        together in one long text field.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=unstructured-kwd-group
+                                                                   -->
+<!ELEMENT  unstructured-kwd-group
+                        (#PCDATA %unstructured-kwd-group-elements;)* >
+<!ATTLIST  unstructured-kwd-group
+             %unstructured-kwd-group-atts;                           >
+
+
+<!-- ============================================================= -->
+<!--                    STILL FURTHER ARTICLE METADATA             -->
+<!-- ============================================================= -->
+
+
+<!--                    CORRESPONDENCE INFORMATION ELEMENTS        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the correspondence information.            -->
+<!ENTITY % corresp-elements
+                        "| %address.class; | %address-link.class;|
+                         %emphasis.class; | %label.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    CORRESPONDENCE INFORMATION                 -->
+<!--                    Optional element, used as a container for
+                        information concerning which of the authors
+                        (or other contributors) is the corresponding
+                        contributor, to whom information requests
+                        should be addressed.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=corresp
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=corresp
+                                                                   -->
+<!ELEMENT  corresp      (#PCDATA %corresp-elements;)*                >
+<!ATTLIST  corresp
+             %corresp-atts;                                          >
+
+
+<!--                    PUBLICATION DATE NOT AVAILABLE MODEL       -->
+<!--                    The content model for the EMPTY element 
+                        <pub-date-not-available>.                  -->
+<!ENTITY % pub-date-not-available-model
+                        "EMPTY"                                      >
+
+
+<!--                    DATE NOT AVAILABLE FLAG                    -->
+<!--                    EMPTY element used as a flag to signal that
+                        the publication date (<pub-date>) is not
+                        available. This flag does not mean, necessarily,
+                        that the article is unpublished, just that no
+                        <pub-date> is available.
+                        Details at:                   
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=pub-date-not-available
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=pub-date-not-available
+                                                                   -->
+<!ELEMENT  pub-date-not-available
+                        %pub-date-not-available-model;               >
+<!ATTLIST  pub-date-not-available
+             %pub-date-not-available-atts;                           >
+
+
+<!--                    PUBLICATION DATE MODEL                     -->
+<!--                    The content model for the element <pub-date>
+                                                                   -->
+<!ENTITY % pub-date-model
+                        "%date-model;"                               >
+
+
+<!--                    PUBLICATION DATE                           -->
+<!--                    Date of publication or release of the
+                        material in one particular format.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=pub-date
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=pub-date
+                                                                   -->
+<!ELEMENT  pub-date     %pub-date-model;                             >
+<!ATTLIST  pub-date
+             %pub-date-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    CONFERENCE INFORMATION ELEMENTS            -->
+<!-- ============================================================= -->
+
+
+<!--                    CONFERENCE MODEL                           -->
+<!--                    Content model for the <conference> element -->
+<!ENTITY % conference-model
+                        "(%conference.class;)*"                      >
+
+
+<!--                    CONFERENCE INFORMATION                     -->
+<!--                    The container element for the information
+                        about a single conference and its
+                        proceedings.
+                        Design Note: Conference elements were largely
+                        based on Cross-Ref.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conference
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conference
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conference
+                                                                   -->
+<!ELEMENT  conference   %conference-model;                           >
+<!ATTLIST  conference
+             %conference-atts;                                       >
+
+
+<!--ELEM   conf-date     Defined in %common.ent;                   -->
+<!--ELEM   conf-loc      Defined in %common.ent;                   -->
+<!--ELEM   conf-name     Defined in %common.ent;                   -->
+<!--ELEM   conf-sponsor  Defined in %common.ent;                   -->
+
+
+<!--                    CONFERENCE ACRONYM ELEMENTS                -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference acronym.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an online
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-acronym-elements
+                        "%simple-text;"                              >
+
+
+<!--                    CONFERENCE ACRONYM                         -->
+<!--                    The short name, popular name, or "jargon
+                        name" for a conference, for example,
+                        "Extreme" for "Extreme Markup Languages" or
+                        "SIGGRAPH" for "Special Interest Group on
+                        Computer Graphics".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-acronym
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-acronym
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-acronym
+                                                                   -->
+<!ELEMENT  conf-acronym (#PCDATA %conf-acronym-elements;)*           >
+<!ATTLIST  conf-acronym
+             %conf-acronym-atts;                                     >
+
+
+<!--                    CONFERENCE NUMBER ELEMENTS                 -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference number.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-num-elements
+                        "%simple-text;"                              >
+
+
+<!--                    CONFERENCE NUMBER                          -->
+<!--                    The sequential number of the conference.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-num
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-num
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-num
+                                                                   -->
+<!ELEMENT  conf-num     (#PCDATA %conf-num-elements;)*               >
+<!ATTLIST  conf-num
+             %conf-num-atts;                                         >
+
+
+<!--                    CONFERENCE THEME ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference theme.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an online
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-theme-elements
+                        "%simple-text;"                              >
+
+
+<!--                    CONFERENCE THEME                           -->
+<!--                    The theme, slogan, or major subject area of
+                        the conference.  For example, the name of an
+                        annual conference may be "16th ACH Gathering"
+                        but each year has different theme topic,
+                        such as "Database Integration" or "Topic
+                        Map Subject Access".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-theme
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-theme
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-theme
+                                                                   -->
+<!ELEMENT  conf-theme   (#PCDATA %conf-theme-elements;)*             >
+<!ATTLIST  conf-theme
+             %conf-theme-atts;                                       >
+
+
+<!--                    STRING CONFERENCE NAME ELEMENTS            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the extended text name of the conference
+                        <string-conf>
+                        Design Note: %simple-text; begins with an
+                        OR bar.                                    -->
+<!ENTITY % string-conf-elements
+                        "%simple-text;| %conference.class;"          >
+
+
+<!--                    STRING CONFERENCE NAME                     -->
+<!--                    Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=string-conf
+                                                                   -->
+<!ELEMENT  string-conf  (#PCDATA %string-conf-elements;)*            >
+<!ATTLIST  string-conf
+             %string-conf-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    COUNTING INFORMATION (ARTICLE METADATA)    -->
+<!-- ============================================================= -->
+
+
+<!--                    COUNTS MODEL                               -->
+<!--                    Content model for the <counts> element.    -->
+<!ENTITY % counts-model "(count*, fig-count?, table-count?, 
+                          equation-count?, ref-count?, page-count?, 
+                          word-count?)"                              >
+
+
+<!--                    COUNTS                                     -->
+<!--                    Wrapper element to hold all metadata that
+                        "counts how many of something appear in the
+                        article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=counts
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=counts
+                                                                   -->
+<!ELEMENT  counts       %counts-model;                               >
+<!ATTLIST  counts
+             %counts-atts;                                           >
+
+
+<!--                    COUNT                                      -->
+<!--                    Generic <count> element to count anything a 
+                        publisher or archive may wish to count in a 
+                        document. The @count-type attribute will name 
+                        what is being counted (such as figures, 
+                        tables, sections, contributors, images,
+                        etc.) The @count attribute will state how 
+                        many of the objects are in the document. 
+     
+                        Although a publisher or archive could choose 
+                        to label all the counted objects in a document
+                        using this element, the specific count 
+                        elements (fig-count, equation-count,
+                        word-count, etc.) will be retained for 
+                        backwards compatibility, and may still be
+                        used.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=count
+                                                                   -->
+<!ELEMENT  count        EMPTY                                        >
+<!ATTLIST  count
+             %count-atts;                                            >
+
+
+<!--                    EQUATION COUNT                             -->
+<!--                    Number of display equations <disp-formula>
+                        that appear in the article. Inline-equations
+                        <inline-formula> are not counted. No
+                        distinction is made between numbered and
+                        unnumbered equations, both are counted.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=equation-count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=equation-count
+                                                                   -->
+<!ELEMENT  equation-count
+                        EMPTY                                        >
+<!ATTLIST  equation-count
+             %equation-count-atts;                                   >
+
+
+<!--                    FIGURE COUNT                               -->
+<!--                    Number of Figures <fig> that appear in the
+                        article. Loose <graphic>s that appear
+                        outside figures are not counted.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fig-count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fig-count
+                                                                   -->
+<!ELEMENT  fig-count    EMPTY                                        >
+<!ATTLIST  fig-count
+             %fig-count-atts;                                        >
+
+
+<!--                    TABLE COUNT                                -->
+<!--                    Number of tables (Table Wrapper <table-wrap>
+                        elements that appear in the article. Arrays
+                        are not counted as tables.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=table-count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=table-count
+                                                                   -->
+<!ELEMENT  table-count  EMPTY                                        >
+<!ATTLIST  table-count
+             %table-count-atts;                                      >
+
+
+<!--                    REFERENCE COUNT                            -->
+<!--                    Number of reference citations (whether
+                        <mixed-citation>s, <element-citation>s, or
+                        <nlm-citation>s) that appear in the
+                        bibliographic reference list <ref-list>
+                        in the article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ref-count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ref-count
+                                                                   -->
+<!ELEMENT  ref-count    EMPTY                                        >
+<!ATTLIST  ref-count
+             %ref-count-atts;                                        >
+
+
+<!--                    PAGE COUNT                                 -->
+<!--                    Number of pages in a print article, counting
+                        each page or partial page as one. Electronic
+                        articles do not have page counts.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=page-count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=page-count
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=page-count
+                                                                   -->
+<!ELEMENT  page-count   EMPTY                                        >
+<!ATTLIST  page-count
+             %page-count-atts;                                       >
+
+
+<!--                    WORD COUNT                                 -->
+<!--                    Approximate number of words that appear in
+                        the textual portion of an
+                        article (not including the words in the
+                        metadata or header information)
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=word-count
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=word-count
+                                                                   -->
+<!ELEMENT  word-count   EMPTY                                        >
+<!ATTLIST  word-count
+             %word-count-atts;                                       >
+
+             
+             
+<!-- ============================================================= -->
+<!--                    TITLE GROUP ELEMENTS (BIBLIOGRAPHIC)       -->
+<!-- ============================================================= -->
+
+
+<!--                    TITLE GROUP MODEL                          -->
+<!--                    Content model for the <title-group> element-->
+<!ENTITY % title-group-model
+                        "(article-title, subtitle*,
+                          trans-title-group*, alt-title*, fn-group?)">
+
+
+<!--                    TITLE GROUP                                -->
+<!--                    Wrapper element to hold the various article
+                        titles.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=title-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=title-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=title-group
+                                                                   -->
+<!ELEMENT  title-group  %title-group-model;                          >
+<!ATTLIST  title-group
+             %title-group-atts;                                      >
+
+
+<!--ELEM   article-title
+                        Defined in %common.ent;                    -->
+<!--ELEM   trans-title  Defined in %common.ent;                    -->
+
+
+<!--                    SUBTITLE ELEMENTS                          -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <subtitle>.
+                        An earlier version of this tag set used the
+                        parameter entity %title-elements; for many
+                        title elements including <subtitle>.       -->
+<!ENTITY % subtitle-elements
+                        "%title-elements;"                           >
+
+
+<!--                    ARTICLE SUBTITLE                           -->
+<!--                    Secondary title of a journal article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=subtitle
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=subtitle
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=subtitle
+                                                                   -->
+<!ELEMENT  subtitle     (#PCDATA %subtitle-elements;)*               >
+<!ATTLIST  subtitle
+             %subtitle-atts;                                         >
+
+
+<!--                    ALTERNATE TITLE                            -->
+<!--                    A "different" version of an article title,
+                        usually created so that it can be processed
+                        in a special way, for example a short
+                        version of the title for use in a Table of
+                        Contents, an ASCII title, a right-running-
+                        head title, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=alt-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=alt-title
+                                                                   -->
+<!ELEMENT  alt-title    (#PCDATA %alt-title-elements;)*              >
+<!ATTLIST  alt-title
+             %alt-title-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    AUTHOR COMMENTS                            -->
+<!-- ============================================================= -->
+
+
+<!--                    AUTHOR COMMENT MODEL                       -->
+<!--                    Content model for the <author-comment>
+                        element                                    -->
+<!ENTITY % author-comment-model
+                        "(title?, (%just-para.class;)+ )"            >
+
+
+<!--                    AUTHOR COMMENT                             -->
+<!--                    Used for extra textual material associated
+                        with a contributor such as an author or
+                        editor
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=author-comment
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=author-comment
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=author-comment
+                                                                   -->
+<!ELEMENT  author-comment
+                        %author-comment-model;                       >
+<!ATTLIST  author-comment
+             %author-comment-atts;                                   >
+
+
+<!-- ============================================================= -->
+<!--                    PUBLICATION HISTORY DATE ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    HISTORY MODEL                              -->
+<!--                    The content model for the <history> element
+                                                                   -->
+<!ENTITY % history-model
+                        "(%date.class;)+"                            >
+
+
+<!--                    HISTORY:  DOCUMENT HISTORY                 -->
+<!--                    Used as a container for dates related to the
+                        processing history of the document, such as
+                        received date and accepted date.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=history
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=history
+                                                                   -->
+<!ELEMENT  history      %history-model;                              >
+<!ATTLIST  history
+             %history-atts;                                          >
+
+
+<!-- ============================================================= -->
+<!--                    PUBLICATION HISTORY EVENT ELEMENTS         -->
+<!--                    More than a date (from BITS)               -->
+<!-- ============================================================= -->
+
+
+<!--                    EVENT DESCRIPTION ELEMENTS                 -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <event-desc> element.                      -->
+<!ENTITY % event-desc-elements
+                        "| %address-link.class; |
+                         %article-identifier.class; |
+                         %article-version.class; |  
+                         %date.class; | %pub-date.class; |
+                         pub-date-not-available"                     >
+
+
+<!--                    EVENT DESCRIPTION                          -->
+<!--                    This is a description of an event in the
+                        publishing history of a book, for example,
+                        reprinting or publication of the revised online
+                        edition. This text field may be as
+                        simple a few words or as complex as a
+                        narrative with embedded markup.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=event-desc
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=event-desc
+                                                                    -->
+<!ELEMENT  event-desc   (#PCDATA %event-desc-elements;)*             >
+<!ATTLIST  event-desc
+             %event-desc-atts;                                       >
+
+
+<!--                    EVENT MODEL                                -->
+<!--                    The content model for the <event> element. -->
+<!ENTITY % event-model  "(event-desc?, article-id*, 
+                          (%article-version.class;)?,
+                          ( (%pub-date.class;)* | 
+                             pub-date-not-available?),
+                          (%date.class;)*,
+                          issn*, issn-l?, isbn*, permissions?,
+                          notes*, self-uri*)"                        >
+
+
+<!--                    EVENT IN PUBLISHING HISTORY                -->
+<!--                    This is a description of an event in the
+                        publishing history of a book, for example,
+                        reprinting or publication of the revised online
+                        edition. This text field may be as
+                        simple a few words or as complex as a
+                        narrative with embedded markup.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=event
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=event
+                                                                   -->
+<!ELEMENT  event        %event-model;                                >
+<!ATTLIST  event
+             %event-atts;                                            >
+
+
+<!--                    PUBLICATION HISTORY MODEL                  -->
+<!--                    The content model for the <pub-history>
+                        element.                                   -->
+<!ENTITY % pub-history-model
+                        "((%event.class;)+ )"                        >
+
+
+<!--                    PUBLICATION HISTORY                        -->
+<!--                    Used as a container for events related to the
+                        processing history of the document, such as
+                        online publication date or reprint date.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=pub-history 
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=pub-history 
+                                                                   -->
+<!ELEMENT  pub-history  %pub-history-model;                          >
+<!ATTLIST  pub-history
+             %pub-history-atts;                                      >
+
+<!-- ============================================================= -->
+<!--                    ISSUE TITLE GROUP                          -->
+<!-- ============================================================= -->
+
+
+<!--                    ISSUE TITLE GROUP                          -->
+<!--                    Complete content model for the
+                        <issue-title-group> element                -->
+<!ENTITY % issue-title-group-model
+                        "(issue-title, issue-subtitle*,
+                          trans-title-group*)"                       >
+
+
+<!--                    ISSUE TITLE GROUP                          -->
+<!--                    Grouping element to associate issue title
+                        metadata such as issue title and subtitle
+                        for the cases where there is more than one
+                        issue. Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue-title-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue-title-group
+                                                                   -->
+<!ELEMENT  issue-title-group
+                        %issue-title-group-model;                    >
+<!ATTLIST  issue-title-group
+             %issue-title-group-atts;                                >
+
+<!-- ============================================================= -->
+<!--                    PROCESSING METADATA ELEMENTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    PROCESSING METADATA GROUP                  -->
+<!--                    Complete content model for the
+                        <processing-meta> element                  -->
+<!ENTITY % processing-meta-model
+                        "(restricted-by*, extended-by*, 
+                          custom-meta-group*)"                       >
+
+
+<!--                    PROCESSING METADATA MODEL                  -->
+<!--                    Optional container element, used to hold the 
+                        processing metadata elements, which describe
+                        processing information descriptive of the
+                        XML-tagged document (document instance).
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=processing-meta
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=processing-meta                                                                                       -->
+<!ELEMENT  processing-meta
+                        %processing-meta-model;                      >
+<!ATTLIST  processing-meta
+             %processing-meta-atts;                                  >
+
+
+<!--                    EXTENDED-BY ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <extended-by>.
+                        Design Note: This inline mix must begin with
+                        an OR bar.                                 -->
+<!ENTITY % extended-by-elements
+                        ""                                           >
+
+<!--                    EXTENDED-BY MODEL                          -->
+<!--                    Identification of a JATS extension or superset
+                        the document claims to be following. The 
+                        element is repeatable so that more than one
+                        extension can be claimed, odd as that seems.
+                        The content may be a name, such as “taxpub”, 
+                        or a URI.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=extended-by
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem= extended-by                                                                                          -->
+<!ELEMENT  extended-by  (#PCDATA %extended-by-elements;)*            >
+<!ATTLIST  extended-by
+             %extended-by-atts;                                      >
+
+
+<!--                    RESTRICTED-BY ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <restricted-by>.
+                        Design Note: This inline mix must begin with
+                        an OR bar.                                 -->
+<!ENTITY % restricted-by-elements
+                        ""                                           >
+
+<!--                    RESTRICTED-BY MODEL                        -->
+<!--                    Identification of one of the guidelines or 
+                        other restrictions (such as a tighter subset
+                        schema) the document claims to be following. 
+                        The element is repeatable so that more than 
+                        one set of restrictions can be claimed. The
+                        content may be a name such as “jats4r” or 
+                        “pmc” or a URI, for example the URL of a
+                        particular JATS4R recommendation.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=restricted-by
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=restricted-by
+                                                                   -->
+<!ELEMENT  restricted-by
+                        (#PCDATA %restricted-by-elements;)*          >
+<!ATTLIST  restricted-by
+             %restricted-by-atts;                                    >
+
+
+<!-- ================== End Article Metadata Elements  =========== -->
diff --git a/dtd/JATS-backmatter1-3.ent b/dtd/JATS-backmatter1-3.ent
new file mode 100644
index 0000000..9c73878
--- /dev/null
+++ b/dtd/JATS-backmatter1-3.ent
@@ -0,0 +1,540 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Back Matter Elements                              -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Back Matter Elements v1.3 20210610//EN"
+     Delivered as file "JATS-backmatter1-3.ent"                    -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names elements that are not part of the main      -->
+<!--             textual flow of a work, but are considered to be  -->
+<!--             ancillary material.                               -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 21. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 20. OBJECT ID Added <object-id> to: 
+        <app-group>, <glossary>, 
+
+ 19. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+    ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+      
+ 18. ADDED SUBJECTS TO WHEREVER KEYWORDS ALLOWED - Added
+     <subj-group> directly to the following elements:
+      - app-group 
+ 
+ 17. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 16. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 15. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 14. BITS "2.0" and "v2.0 20151225" remains unchanged
+ 
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 13. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 12. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 11. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 10. JATS became version "1.1d3" and "v1.1d3 20150301"
+ 
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+   9. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  8. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base to every element, whether 
+     metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+  7. ABSTRACTS AND KEYWORDS ON NEW STRUCTURES
+     - Added <abstract> (through %abstract.class;) and <kwd-group> 
+       (through %kwd-group.class;) to the following elements:
+        - app (through %sec-model;)
+        - app-group (through %app-group-model;)
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+  
+  6. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  4. Updated the DTD-version attribute to "0.4" 
+   
+  3. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+  2. @XML:LANG - Added @xml:lang to the following elements:
+      - app through app-atts
+      - app-group through app-group-atts
+      - fn-group through fn-group-atts
+      - glossary through glossary-atts
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENTS                       -->
+<!-- ============================================================= -->
+
+
+<!--ELEM   bio          Defined in %common.ent;                    -->
+<!--ELEM   ref-list     Defined in %references.ent;                -->
+<!--ELEM   sec          Defined in %section.ent;                   -->
+<!--ELEM   ack          Defined in %common.ent;                    -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    APPENDIX ATTRIBUTES                        -->
+<!--                    Attributes for the Appendix <app> element  -->
+<!ENTITY % app-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    APPENDIX GROUP ATTRIBUTES                  -->
+<!--                    Attributes for the Appendix Group <app-group>
+                        element                                    -->
+<!ENTITY % app-group-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    FOOTNOTE GROUP ATTRIBUTES                  -->
+<!--                    Attributes for the Footnote Group <fn-group>
+                        element                                    -->
+<!ENTITY % fn-group-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    GLOSSARY ATTRIBUTES                        -->
+<!--                    Attributes for the Glossary <glossary>
+                        element                                    -->
+<!ENTITY % glossary-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    APPENDIX ELEMENTS                          -->
+<!-- ============================================================= -->
+
+
+<!--                    APPENDIX GROUP MODEL                       -->
+<!--                    Content model for the <app-group> element  -->
+<!ENTITY % app-group-model
+                        "((%id.class;)*, label?, title?, 
+                          (%abstract.class;)*, (%kwd-group.class;)*,
+                          (%subj-group.class;)*,
+                          (%para-level;)*,
+                          (%app.class; | %ref-list.class;)*)"        >
+
+
+<!--                    APPENDIX GROUP                             -->
+<!--                    A container element to hold one or more
+                        Appendices.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=app-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=app-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=app-group
+                                                                   -->
+<!ELEMENT  app-group    %app-group-model;                            >
+<!ATTLIST  app-group
+             %app-group-atts;                                        >
+
+
+<!--                    APPENDIX MODEL                             -->
+<!--                    Content model for the <app> element.       -->
+<!ENTITY % app-model    "(%sec-model;, permissions?)"                >
+
+
+<!--                    APPENDIX                                   -->
+<!--                    Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=app
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=app
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=app
+                                                                   -->
+<!ELEMENT  app          %app-model;                                  >
+<!ATTLIST  app
+             %app-atts;                                              >
+
+
+<!-- ============================================================= -->
+<!--                    FOOTNOTE GROUPING ELEMENTS                 -->
+<!-- ============================================================= -->
+
+
+<!--                    FOOTNOTE GROUP MODEL                       -->
+<!--                    Content model for the <fn-group> element   -->
+<!ENTITY % fn-group-model
+                        "(label?, title?, (%fn-link.class;)+ )"      >
+
+
+<!--                    FOOTNOTE GROUP                             -->
+<!--                    Footnotes in a journal article may be
+                        scattered throughout the text, at the places
+                        they occur, or collected in groups at the
+                        end of structural units.  This element is a
+                        wrapper tag for such groups of footnotes.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fn-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fn-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=fn-group
+                                                                   -->
+<!ELEMENT  fn-group     %fn-group-model;                             >
+<!ATTLIST  fn-group
+             %fn-group-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    GLOSSARY                                   -->
+<!-- ============================================================= -->
+
+
+<!--                    GLOSSARY MODEL                             -->
+<!--                    Content model for the <glossary> element   -->
+<!ENTITY % glossary-model
+                        "((%id.class;)*, label?, title?, 
+                          (%para-level;)*, glossary*)"               >
+
+
+<!--                    GLOSSARY ELEMENTS                          -->
+<!--                    Glossary or list of definitions.  Typically
+                        the content will be one or more <def-list>s.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=glossary
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=glossary
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=glossary
+                                                                   -->
+<!ELEMENT  glossary     %glossary-model;                             >
+<!ATTLIST  glossary
+             %glossary-atts;                                         >
+
+
+<!-- ================== End Back Matter Module =================== -->
diff --git a/dtd/JATS-chars1-3.ent b/dtd/JATS-chars1-3.ent
new file mode 100644
index 0000000..ceca270
--- /dev/null
+++ b/dtd/JATS-chars1-3.ent
@@ -0,0 +1,664 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Custom Special Characters Module                  -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Custom Special Characters Module v1.3 20210610//EN"
+     Delivered as file "JATS-chars1-3.ent"                         -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    XML special character entities                    -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Definitions of DTD-specific and custom         -->
+<!--                special characters (as general entities        -->
+<!--                defined as hexadecimal or decimal character    -->
+<!--                entities - Unicode numbers)                    -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 19. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 18. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 17. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 16. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 15. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 14. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 13. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 12. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 11. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 10. JATS became version "1.1d3" and "v1.1 20150301//EN"
+  
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+   9. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+ 
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  8. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+ 
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+ 
+  7. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  6. Updated the DTD-version attribute to "0.4" 
+   
+  5. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  4. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+       - private-char through private-char-atts (@specific-use)
+
+  3. PEs FOR CONTENT MODELS - Added parameter entity redefinitions
+     for the model of the <private-char> element.
+
+  2. PEs FOR ATTLISTS - Added parameter entity redefinitions for the
+     attribute lists of the following elements: (no attributes or
+     values were changed)
+       - glyph-ref         glyph-ref-atts
+       - glyph-data        glyph-data-atts
+       - private-char      private-char-atts
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+<!-- ============================================================= -->
+<!--                    DESIGN COMMENT                             -->
+<!-- ============================================================= -->
+<!--                    This DTD Suite has been designed with Unicode
+                        as the basic representation of all special
+                        characters. The use of combining characters
+                        is supported and encouraged as is the use
+                        of entities defined by the STIX project
+                        (http://www.ams.org/STIX/). Unicode values
+                        in planes other than Plane 0 may be freely
+                        used.
+
+                        Use of private publisher entities and Unicode
+                        Private Use Area is discouraged, but supported
+                        with the <private-char> element, for which a
+                        corresponding bitmap must be submitted.
+
+                        In cases where an entity name has been generally
+                        accepted with a corresponding Unicode number
+                        and the entity has not been added to
+                        the ISO standard entity sets, a named entity
+                        may be defined below (e.g. &euro;).
+
+                        Because of the potential for conflicts in
+                        assignments by different publishers,
+                        the JATS DTD Suite does not support assignment 
+                        of values in the Unicode Private Use Area.
+                        Publishers who have defined characters in the
+                        Private Use Area must remap those characters
+                        to existing Unicode values (using combining
+                        characters for special accented characters
+                        where appropriate), or must submit bitmaps of
+                        those characters using one of the two methods
+                        supported under the <private-char> element.
+
+                        Those custom publisher entities for which
+                        corresponding Unicode values have not been
+                        determined must be tagged with the
+                        <private-char> element. Publishers must submit
+                        bitmaps of those characters using one of the
+                        two methods supported in the <private-char>
+                        element.                                   -->
+
+<!-- ============================================================= -->
+<!--                    COMMONLY ACCEPTED ENTITIES FOR UNICODE
+                        GLYPHS                                     -->
+<!-- ============================================================= -->
+
+<!--                    For each of the following entities a name
+                        and a Unicode numerical character reference
+                        is given. Where a unique Unicode character
+                        could be determined, that character was used.
+                        For some of the symbols combining characters
+                        have been used. Do not use this space to
+                        redefine characters already found in standard
+                        ISO entity sets. Do not use this space to
+                        define any character that cannot be
+                        represented with Unicode.                  -->
+
+<!--                    LATIN SMALL LETTER G WITH CARON            -->
+<!ENTITY  gcaron        "&#x01E7;"                                   >
+
+
+<!--                    LATIN CAPITAL LETTER H WITH MACRON         -->
+<!ENTITY  Hmacr         "&#x0048;&#x0304;"                           >
+
+
+<!--                    EURO CURRENCY                              -->
+<!ENTITY  euro          "&#x20AC;"                                   >
+
+
+<!--                    FRANC CURRENCY                             -->
+<!ENTITY  franc         "&#x20A3;"                                   >
+
+
+<!-- ============================================================= -->
+<!--                    ATTRIBUTE LISTS FOR PRIVATE CHARACTERS     -->
+<!-- ============================================================= -->
+
+
+<!--                    GLYPH DATA ATTRIBUTES                      -->
+<!--                    Attribute list for the <glyph-data>
+                        element                                    -->
+<!ENTITY % glyph-data-atts
+            "%jats-common-atts;                                       
+             fontchar   CDATA                              #IMPLIED
+             fontname   CDATA                              #IMPLIED
+             format     NMTOKEN                            #IMPLIED
+             resolution CDATA                              #IMPLIED
+             xml:space  (preserve)                 #FIXED 'preserve'
+             x-size     CDATA                              #IMPLIED
+             y-size     CDATA                              #IMPLIED" >
+
+
+<!--                    GLYPH REFERENCE ATTRIBUTES                 -->
+<!--                    Attribute list for the <glyph-ref>
+                        element                                    -->
+<!ENTITY % glyph-ref-atts
+            "%jats-common-atts;                                       
+             glyph-data IDREF                             #IMPLIED"  >
+
+
+<!--                    PRIVATE USE AREA AND CUSTOM CHARACTERS
+                        ATTRIBUTES                                 -->
+<!--                    Attribute list for the <private-char>
+                        element                                    -->
+<!ENTITY % private-char-atts
+            "%jats-common-atts;                                       
+             description
+                        CDATA                             #IMPLIED
+             name       CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    PRIVATE USE AREA AND CUSTOM CHARACTERS     -->
+<!-- ============================================================= -->
+<!--
+                        Special characters defined by publishers as
+                        custom entities or in the Unicode Private Use
+                        Area may not be deposited as is. If they
+                        cannot be remapped to existing Unicode values,
+                        they must be submitted as a bitmap using
+                        the <private-char> element. The most
+                        repository-friendly technique is <glyph-data>
+                        although individual bitmap files may be
+                        submitted with inline-graphic.
+
+                        We would like to thank Beacon Publishing and
+                        the APS (American Physical Society) for
+                        providing us with this technique.          -->
+
+
+<!--                    PRIVATE CHARACTER MODEL                    -->
+<!--                    The content model for the <private-char>
+                        element                                    -->
+<!ENTITY % private-char-model
+                        "((glyph-data | glyph-ref) | inline-graphic*)"
+                                                                     >
+
+
+<!--                    PRIVATE CHARACTER (CUSTOM OR UNICODE)      -->
+<!--                    A custom character entity defined by a
+                        publisher or a custom character from the
+                        Unicode private-use area for which a bitmap
+                        is submitted for the glyph.
+
+                        Since there are no completely standard/public
+                        agreements on how such characters are to be
+                        named and displayed, this technique is to be
+                        used instead of a custom general entity
+                        reference, to provide complete information
+                        on the intended character.
+                        A document should contain a <private-char>
+                        element at each location where a private
+                        character is used within the document. The
+                        corresponding image for the glyph may be
+                        given in the <glyph-data> element or as an
+                        external bitmap file referenced by an
+                        <inline-graphic> element.
+
+                        Implementation Note: <inline-graphic> should
+                        only be used outside <private-char> when the
+                        graphic is something other than a special
+                        character.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=private-char
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=private-char
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=private-char
+                                                                   -->
+<!ELEMENT  private-char %private-char-model;                         >
+<!--         description
+                        A human-readable description of the
+                        character, for example, "Arrow, normal
+                        weight, single line, two-headed, Northwest
+                        to Southeast".
+             name       Unique name for the character in all
+                        uppercase ASCII, similar to names found
+                        in Unicode standard (e.g., "NORTHWEST
+                        SOUTHEAST ARROW"                           -->
+<!ATTLIST  private-char
+             %private-char-atts;                                     >
+
+
+<!--                    GLYPH DATA FOR A PRIVATE CHARACTER         -->
+<!--                    This element is used when there is known to
+                        be no font available to render the private
+                        character. The <glyph-data> element can be
+                        used to provide information on the actual
+                        glyph that is associated with the private-use
+                        character. The element includes an inline
+                        bitmap of the glyph encoded in plain
+                        PBM (Plain Bit Map) format so that it is
+                        human-readable.
+
+                        For example:
+                        <private-char name="NORTHWEST SOUTHEAST ARROW"
+                        description="Arrow, normal weight, single
+                        line, two-headed, Northwest to Southeast">
+                        <glyph-data format="PBM" resolution="300"
+                        x-size="34" y-size="34">
+                        0000000000000000000000000000000000
+                        0111111111111100000000000000000000
+                        0111111111111100000000000000000000
+                        0111110000000000000000000000000000
+                        0111110000000000000000000000000000
+                        0111111000000000000000000000000000
+                        0110111100000000000000000000000000
+                        0110011110000000000000000000000000
+                        0110001111000000000000000000000000
+                        0110000111100000000000000000000000
+                        0110000011110000000000000000000000
+                        0110000001111000000000000000000000
+                        0110000000111100000000000000000000
+                        0110000000011110000000000000000000
+                        0110000000001111000000000000000000
+                        0110000000000111100000000000000000
+                        0110000000000011110000000000000000
+                        0000000000000001111000000000000000
+                        0000000000000000111100000000000110
+                        0000000000000000011110000000000110
+                        0000000000000000001111000000000110
+                        0000000000000000000111100000000110
+                        0000000000000000000011110000000110
+                        0000000000000000000001111000000110
+                        0000000000000000000000111100000110
+                        0000000000000000000000011110000110
+                        0000000000000000000000001111000110
+                        0000000000000000000000000111100110
+                        0000000000000000000000000011110110
+                        0000000000000000000000000001111110
+                        0000000000000000000000000001111110
+                        0000000000000000011111111111111110
+                        0000000000000000011111111111111110
+                        0000000000000000000000000000000000
+                        </glyph-data></private-char>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=glyph-data
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=glyph-data
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=glyph-data
+                                                                   -->
+<!ELEMENT  glyph-data   (#PCDATA)                                    >
+<!--         id         Identifier so that the full glyph data need
+                        not be repeated every time the character is
+                        used. The <glyph-ref> element can be used
+                        to point to this ID, to reuse a character
+                        in subsequent text.
+             fontchar   The offset of the character into a glyph
+                        table, such as a Unicode character.
+             fontname   The name of the character
+             format     Names the image format of the bitmap. Should
+                        be "PBM" if the plain bitmap is included
+                        inline.
+             resolution Resolution of the bitmap in dots per inch,
+                        expressed as a decimal integer (e.g. 72, 300)
+             xml:space  Preserve whitespace within this element.
+             x-size     Number of pixels per row in the bit-mapped
+                        glyph
+             y-size     Number of rows of the bit-mapped glyph     -->
+<!ATTLIST  glyph-data
+             %glyph-data-atts;                                       >
+
+
+<!--                    GLYPH REFERENCE FOR A PRIVATE CHARACTER    -->
+<!--                    Once a private character has been declared
+                        using a <glyph-data> element, the character
+                        can be reused by using this element to
+                        point to the full <glyph-data> element.
+                        The pointing uses the ID/IDREF mechanism,
+                        using the "glyph-data" attribute of this
+                        element to point to the "id" attribute of
+                        another <glyph-data> element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=glyph-ref
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=glyph-ref
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=glyph-ref
+                                                                   -->
+<!ELEMENT  glyph-ref    EMPTY                                        >
+<!--         glyph-data An IDREF-type attribute that points to the
+                        "id" attribute of a <glyph-data> character.
+                        The idea is to use the full glyph data once,
+                        then point to an existing character instead
+                        of repeating the entire glyph data again.  -->
+<!ATTLIST  glyph-ref
+             %glyph-ref-atts;                                        >
+
+<!-- ================== End Custom XML Special Characters ======== -->
diff --git a/dtd/JATS-common-atts1-3.ent b/dtd/JATS-common-atts1-3.ent
new file mode 100644
index 0000000..5233f73
--- /dev/null
+++ b/dtd/JATS-common-atts1-3.ent
@@ -0,0 +1,360 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Common Attributes (for all elements)              -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Common Attributes (for all elements) v1.3 20210610//EN"
+     Delivered as file "JATS-common-atts1-3.ent"                   -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines attributes intended to be used on ALL the -->
+<!--             elements defined in the NISO JATS, including the  -->
+<!--             elements for the XHTML-inspired and OASIS-inspired-->
+<!--             table models, excluding only <mml:math> and       -->
+<!--             <xi:include>, whose namespaces JATS does not      -->
+<!--             control.                                          -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 13. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 12. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 11. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 10. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+  9. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+  8. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  7. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+  6. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  5. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  4. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  3. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+  
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  2. XML Base
+     Added the attribute @xml:base to the Global (common)
+     attributes used on all elements.
+   
+     =============================================================
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    NISO JATS COMMON ATTRIBUTES                -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON ATTRIBUTES                          -->
+<!--                    These lists of attributes will be added to 
+                        nearly every element, in both the document 
+                        metadata and the document body, of the entire 
+                        Tag Set:
+                          - including table elements for both the 
+                              XHTML-inspired and OASIS-inspired
+                              table model elements
+                          - excluding only <mml:math> and 
+                              <xi:include> (whose namespaces JATS
+                              does not control).
+                           Great care should be taken to use these
+                        attributes judiciously, not as a shortcut to
+                        thinking through where an attribute should be
+                        used. Potential use cases include adding
+                        @xml:lang or some RDFa attribute to every 
+                        elements.                                  -->
+
+
+<!--                    BASE ATTRIBUTES                            -->
+<!--                    Holds all the common attributes except @id.
+                        Used to keep the two common attribute lists 
+                        in sync. To add a global attribute, modify
+                        this list.                                 -->
+<!ENTITY % jats-base-atts
+            "xml:base   CDATA                             #IMPLIED"  >
+
+
+<!--                    JATS COMMON ATTRIBUTES                     -->
+<!--                    Holds all the common attributes, as defined in
+                        the base attribute parameter entity, plus an
+                        optional @id.                              -->
+<!ENTITY % jats-common-atts
+            "id         ID                                #IMPLIED 
+             %jats-base-atts;"                                       >
+
+
+<!--                    JATS COMMON ATTRIBUTES (ID REQUIRED)       -->
+<!--                    Holds all the common attributes, as defined in
+                        the base attribute parameter entity, plus a 
+                        required @id.                              -->
+<!ENTITY % jats-common-atts-id-required
+            "id         ID                                #REQUIRED
+             %jats-base-atts;"                                       >
+
+
+<!-- ================== End JATS Common Attributes Module ======== -->
diff --git a/dtd/JATS-common1-3.ent b/dtd/JATS-common1-3.ent
new file mode 100644
index 0000000..93f9189
--- /dev/null
+++ b/dtd/JATS-common1-3.ent
@@ -0,0 +1,4659 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Common (Shared) Elements Module                   -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Common (Shared) Elements Module v1.3 20210610//EN"
+Delivered as file "JATS-common1-3.ent"                             -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the common parameter entities, calls the  -->
+<!--             shared modules (such as special characters and    -->
+<!--             notations) and provides declarations for elements -->
+<!--             that do not properly fit into one class, since    -->
+<!--             they can be used at more than one structural level-->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             1) Standard XML Special Characters Module         -->
+<!--                                       (%xmlspecchars.ent;)    -->
+<!--             2) Custom XML Special Characters (%chars.ent;)    -->
+<!--             3) Notation Declarations    (%notat.ent;)         -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 76. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+75. Custom Metadata Group - Added the attribute @content-type, 
+    @specific-use, and @xml:lang. Inside <processing-meta>,
+    <custom-meta-group> will be allowed to repeat.
+    Not allowed to repeat anywhere else for 1.3d2. Maybe later
+       
+74. OBJECT ID Added <object-id> to: 
+        <alternatives>, <citation-alternatives> 
+
+73. OBJECT ID <object-id> element added to <sec-meta>, which
+      therefore added <object-id> to:
+      - In Green: abstract, ack, app, bio, boxed-text, notes, 
+                  question, sec, and trans-abstract  
+      - In Blue:  app, bio, boxed-text, notes, question, sec
+                  (added the others directly)
+      In some elements (for example, <abstract> in Green)
+      the model will be:
+         abstract  (object-id*, (sec-meta?, label?, title?, 
+                    (%para-level;)*, ...)  >
+      This results in <object-id> being allowed in two places:
+      both at the beginning of <abstract> and inside <sec-meta>
+      within <abstract>. This is a known problem caused by
+      backward compatibility requirements, and it will be
+      what it will be.
+ 
+ 72. EXPANSION OF FIXED ATTRIBUTES LIST: There are four  
+     content-defined attributes which are CDATA values 
+     (undetermined) in Archiving, but which are named value 
+     lists in Publishing/Authoring:
+       - @fn-type 
+       - @person-group-type
+       - @pub-id-type
+       - @ref-type 
+     In order to give users of Publishing and Authoing
+     more flexibility to name new values without 
+     destroying the benefit of named value lists:
+       - A new value “custom” has been added to the named
+           value list of each of these four attributes.
+       - A new attribute @custom-type has been added to
+           each element that takes one of these attributes.
+     In this module:
+      - The element <fn> was given the new attribute 
+        @custom-type and "custom" was added to
+        %fn-types (the footnote type named value list).
+      - The element <person-group> was given the new 
+        attribute @custom-type and "custom" was added to
+        %person-group-types (the person group type named 
+        value list). As an example: 
+           <person-group @person-group-type=”custom” 
+            custom-type=”statisticians”>
+     The Best Practice rule (unenforceable in DTDs, but  
+     enforceable in Schematron) is, that if you use the 
+     value “custom” from one of these lists, you should 
+     also record what type of 'custom' in the 
+     @custom-type attribute.                        
+
+ 71. CUSTOM META - Added all 4 vocabulary attributes to
+     <custom-meta>.
+
+ 70. STRING DATE - Added to models through
+     %references.class; Added to:
+        <related-article>
+     
+ 69. ISSUE SUBTITLE - Added <issue-subtitle> to 
+     <issue-title-group> optional and repeatable
+     
+ 68. ISSUE TITLE GROUP - Added <issue-title-group> to 
+     <volume-issue-group> optional and repeatable
+
+ 67. ASSIGNING AUTHORITY - @assigning-authority attribute
+     added to: 
+       <custom-meta>, <isbn>, <issn>, <issn-l>, <role>, <uri>
+ 
+ 66. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+     
+ 65. BLOCK ALTERNATIVES - Add a new alternative-type element
+     that provides for alternative block objects such as
+     figures, tables, and boxed-text
+     
+ 64. ADDED SUBJECTS TO WHEREVER KEYWORDS ALLOWED - Added
+     <subj-group> to the following elements through <sec-meta>
+      - abstract and trans-abstract
+      - ack, app, bio, boxed-text, notes, question, sec
+
+ 63. LANGUAGE OF THE TARGET ARTICLE - Added a new optional
+     attribute @hreflang to name the language of the
+     target to which the <related-article> points.
+
+ 62. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote)
+     
+    ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 61. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 60. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 59. PUB-ID-TYPE - @pub-id-type (for all tag sets EXCEPT 
+     Archiving) changed back to a fixed list from CDATA for some
+     elements, reversing the decision of Version 1.2d1. Although 
+     the value list is unchanged, best practice will be documented
+     as using @pub-id-type for type and @assigning-authority
+     for the responsible agency.
+        The following were changed back. Therefore, Archiving must 
+     override the following attribute lists to make @pub-id-type 
+     CDATA:
+         - <article-id> (now value list)
+         - <pub-id>     (now value list)
+     But no change to the following, which were CDATA in version 1.1
+         - <issue-id>
+         - <object-id>
+         - <volume-id>
+
+ 58. ASSIGNING AUTHORITY - Added @assigning-authority to the
+     following elements, so that the type-of-identifier 
+     could be recorded with @pub-id-type and the party-
+     responsible-for-the-identifier could be recorded
+     using @assigning-authority. Previously, these value 
+     types were conflated in @pub-id-type. However, for
+     backward compatibility, @pub-id-type was left as
+     the SAME restricted list, with both types intermingled. 
+         - <contrib-id>
+         - <institution-id>
+         - <issue-id>
+         - <journal-id>
+         - <object-id>
+         - <volume-id>
+         - Note: <ext-link> already took @assigning-authority
+
+ 57. DATA USAGE - Added new CDATA attribute @use-type to both
+     <mixed-citation> and <element-citation>. First use case is to
+     explain cited data usage ("analyzed", "generated", etc.)
+
+ 56. DEGREE OF CONTRIBUTION - Added new CDATA attribute 
+     @degree-contribution to <role> to hold the degree of 
+     contribution. This is an open list, but values are 
+     expected to be "Lead", "Equal", or "Supporting".
+     Numeric values will be discouraged.
+
+ 55. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 54. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+   
+ 53. VOCABULARY/TAXONOMY ATTRIBUTES - Added 4 new attributes for
+     naming (and possibly linking to) a general or controlled
+     taxonomy, vocabulary, index, database or other source of
+     terms: @vocab, @vocab-identifier, @vocab-term, and
+     @vocab-term-identifier
+      - Added all 4 attributes to:
+        - to <role>, for adding CRediT or other specifically named
+          roles to contributors
+        - Added @vocab and @vocab-identifier to <institution-id>
+ 
+ 52. JATS became version "1.2d1" and "v1.2d1 20170631"
+ 
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 51. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 50. ALI (NISO Access and License Indicators)
+     - Added <ali:license_ref> to license-p.class, as 
+       alternatives inside <license>
+     - Use the new class: license.class to hold the new ALI
+       element <ali:free_to_read>, as an alternative to
+       <license> inside <permissions>.
+     - Created new parameter entity 'anyURI' to act as 
+       documentation concerning the content of any element whose
+       content is intended to be a URI.  
+
+ 49. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+
+ 48. VOLUME ISSUE GROUPING
+   - Added new optional element <volume-issue-group> inside 
+     <article-meta), following all volume and issue elements,
+     to hold volume-issue pairs (or n-tuples) when a second
+     and subsequent <volume> has its own related issue
+     information.
+
+ 47. NEW ATTRIBUTE VALUES FOR @PUB-ID-TYPE
+     Added three new values to @pub-id-types:
+      - accession
+      - arc
+      - handle
+ 
+ 46. NEW ATTRIBUTE FOR EXT-LINK
+     Added the CDATA attribute @assigning-authority to <ext-link>
+     to the authority (such as CrossRef) responsible for the
+     link
+
+ 45. NEW ATTRIBUTE FOR CONTRIB-ID
+     Added the boolean attribute @authenticated to <contrib-id> to 
+     record whether the agency that assigned the <contrib-id>
+     says the identifier is authenticated. The default value
+     is "false"
+
+ 44. MORE LINKING POSSIBILITIES
+     Added the might-link-atts to:
+      - volume-id
+      - issue-id
+     so that these potentially external identifiers can link,
+     for example to a DOI.
+
+ 43. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+ 42. NEW ADDRESS ELEMENTS
+      - Added 3 new elements: <city>, <state>, <postal-code>
+      - Therefore introduced new PEs: city-element, state-elements,
+        and postal-code-elements, all set initially to null strings.
+      - Therefore introduced new PEs: city-atts, state-atts,
+        and postal-code-atts.
+      - Added the elements (in the default classes module) to:
+          - address.class
+          - addrress-line.class
+        which adds then to: address, addr-line, aff, collab, 
+        conf-loc, corresp, publisher-loc
+
+ 41. CHANGES TO <collab>
+     Added @symbol attribute.
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 40. CHANGES TO <on-behalf-of>
+     Added <institution>, <institution-wrap>, and <xref>
+
+ 39. NEW <contrib> ATTRIBUTE
+     Added @xml:lang as requested with <institution-id>
+
+ 38. NEW <era> ELEMENT
+     Added <era> through date-parts.class to:
+      - <string-date>
+
+ 37. NEW ELEMENT <era>
+     Added to the model of <date>, optional following year,
+     through date-model.
+
+ 36. XML Base
+     Added the attribute @xml:base to the Global (common)
+     attributes used on all elements.
+
+ 35. INSTITUTION WRAP ADDED
+     Added the elements <institution-wrap> to the following elements
+     through the institution-wrap.class:
+      - <copyright-holder>
+      - <on-behalf-of>
+      - <publisher-name>
+      - <std-organization>
+
+ 34. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added a new attribute list to:
+      - aff-alternatives
+      - alternatives
+      - citation-alternatives
+      - collab-alternatives
+      - custom-meta-group
+      - institution-wrap
+      - meta-name
+      - meta-value
+      - name-alternatives
+      - permissions                          
+
+ 33. INSTITUTIONAL IDENTIFIERS
+     - Added <institution-id> to hold institutional identifiers
+       whether publisher specific ("AIP") or from an established 
+       authorities ("Ringgold" and "ISNI").
+
+     - Added <institution-wrap> to hold both the name of an
+       institution <institution> and all of its institutional 
+       identifiers <institution-id>. This element will be allowed
+       everywhere institution is allowed.
+                          
+
+ 32. ABSTRACTS AND KEYWORDS ON NEW STRUCTURES
+     - Added <abstract> (through %abstract.class;) and <kwd-group> 
+       (through %kwd-group.class;) to the following elements:
+        - sec-meta (through %sec-meta-model;)
+
+ 31. ATTRIBUTE ALIGNMENT
+     - Added @publication-format and @content-type to <issn>
+       through %issn-atts The idea is to make the attributes
+       for <issn> and <isbn> as similar as possible.
+
+     - Added @publication-format to <isbn> through %isbn-atts 
+     
+     The idea is to make the attributes for <issn> and <isbn> as 
+     similar as possible. <issn> retains @pub-type for historical
+     reasons. <issn-l> attributes do not change.
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 30. CONTRIB-GROUP AND CONTRIB MODULE SHIFT - Moved <contrib>
+     and <contrib-group> to common.ent from the module
+     articlemeta.ent, since they are now used
+     in both article metadata and journal metadata.
+
+ 29. CONTRIB ID - Added new element <contrib-id> using new PE 
+     contrib-id.class, contrib-id-atts, contrib-id-model.
+     Element holds one identifier, such as an ORCID, for a
+     person such as a contributor or principal investigator.
+
+ 28. COLLABORATION ALTERNATIVES - Added new element 
+     <collab-alternatives> using new PE %collab-alternatives-model;.
+     Element holds different versions (for example, different
+     language renderings) of a single collaboration.   
+   
+ 27. DATE ATTRIBUTES - Added date attributes
+      - to <conf-date> through %conf-date-atts
+      - to <date> through %date-atts
+      - to <string-date> through %string-date-atts
+      - to <year> through %year-atts
+      
+       a) @iso-8601-date - ISO 8601 standard date format
+          of the publication date. Format  YYYY-MM-DDThh:mm:ss 
+
+       b) @calendar - Name of the calendar used (@calendar) in
+          naming this publication date (such as "Gregorian", 
+          "Japanese" (Emperor years), or "Islamic").
+
+       c) Added @publication-format, so that both publication
+          dates and history dates can separate the for amt of the
+          publication from the version/lifecycle event. Thus
+          both an "article" and a "manuscript" might be received.
+
+ 27. PUBLICATION IDENTIFIER @pub-id-type
+      - Added "std-designation" as value in predefined  list 
+        for '@pub-id-type' (% pub-id-types).
+      - Added new value "arxiv" as value in predefined  list 
+        for '@pub-id-type' (% pub-id-types).
+     "pub-id-types" are used within citations for 
+     <object-id> and <pub-id>; 
+     used within the article metadata for <article-id>, 
+     <issue-id>, and <volume-id>; 
+     used within many body elements for <object-id>.
+       
+ 26. LONG DESCRIPTION - Added the might-link attributes to
+     <long-desc> because of an argument over what <long-desc>
+     should be. The semantic web folks want it to be a URI, the
+     librarians and accessibility (for pronouncing readers) want
+     to find a real description there, not a link. So JATS needs
+     to handle both.
+   
+ 25. ISSN Linking - Added new element <issn-l> with the usual
+     %issn-l-elements; and %issn-l-atts;.
+   
+ 24. MODULE MOVEMENT (from increased reference content)
+
+     a) Element <degrees> - Moved <degrees> and its parameter
+        entities into this module from JATS-articlemeta.ent.
+   
+     b) Element <supplement> - Moved <supplement> and its parameter
+        entities into this module from JATS-articlemeta.ent.
+   
+     c) Element <conf-sponsor> - Moved <conf-sponsor> and its parameter
+        entities into this module from JATS-articlemeta.ent.
+   
+     d) Element <on-behalf-of> - Moved <on-behalf-of> and its parameter
+        entities into this module from JATS-articlemeta.ent.
+   
+ 23. Element <license-p> - Added @content-type, which can hold
+     values such as "open-access", "CCC-statement",
+     "non-commercial-use".
+   
+ 22. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+ 21. Updated the DTD-version attribute to "0.4" 
+   
+ 18. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+ 17. MIXED CITATION ATTS PE - Was defined twice, identically,
+     deleted one of them.
+
+ 16. ACCESSIBILITY - Added @alt to <label> through %label-atts;
+
+ 15. ALTERNATIVES ATTRIBUTES- Created a new parameter entity for
+     attributes for <alternatives>; currently null
+
+ 14. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+       - anonymous through anonymous-atts (both) NEW PE
+       - conf-acronym through conf-acronym-atts (both)
+       - conf-date through conf-date-atts (both)
+       - conf-loc through conf-loc-atts (both)
+       - conf-name through conf-name-atts (both)
+       - conf-num through conf-num-atts (both)
+       - conf-sponsor through conf-sponsor-atts (both)
+       - conf-theme through conf-theme-atts (both)
+       - day through day-atts (@specific-use)
+       - degrees through degrees-atts (both)
+       - element-citation through citation-atts (both)
+       - etal through etal-atts (both) NEW PE
+       - ext-link through ext-link-atts (@xml:lang; @specific-use
+           already)
+       - institution through institution-atts (both)
+       - issue-part through issue-part (both + content-type) NEW PE
+       - isbn through isbn-atts (both) NEW PE
+       - label through label-atts (both) NEW PE
+       - mixed-citation through citation-atts (both)
+       - name through name-atts (@xml:lang; @specific-use already)
+       - notes through notes-atts (both)
+       - prefix through prefix-atts (both)
+       - publisher-loc through publisher-loc-atts (both)
+       - publisher-name through publisher-name-atts (both)
+       - string-name through string-name-atts (both and
+            content-type and name-style) NEW PE
+       - suffix through suffix-atts (both)
+       - textual-form through textual-form-atts (both)
+       - trans-subtitle through trans-subtitle-atts
+          (@xml:lang only) NEW PE
+       - x through x-atts (both)
+
+ 13. AFFILIATION ALTERNATIVES - Created new the element
+     <aff-alternatives> to hold multiple <aff>s that are
+     representations of a single affiliation, for example, the
+     name of an institution in two languages or two scripts.
+     New PE; New attribute PE (currently null)
+
+ 12. RELATED-ARTICLE-ATTS - Removed the dependency that tied
+     %related-article-atts to journal-id-atts and added all
+     the journal-id attributes to related-article-atts explicitly.
+
+ 11. TITLE ELEMENTS - Removed the dependency which had both
+     <subtitle> and <alt-title> modeled with the same parameter
+     entity %title-elements;. Created new PEs for each element
+     but set them (as the default) to %title-elements so that no
+     customization would break. Models changed:
+       - alt-title      %alt-title-elements;
+       - subtitle       %subtitle-elements; (defined in
+                                article-meta3.ent;)
+       - trans-title    %trans-title-elements;
+       - trans-subtitle %trans-subtitle-elements;
+
+ 10. TEXTUAL FORM MODEL - Changed the textual-form-elements
+     parameter entity to begin with an OR bar, since it names
+     elements to be mixed with #PCDATA.
+     *****Customization Alert: New parameter entity could break some
+     customizations. Check your %textual-form-elements parameter
+     entity. *****
+
+  9. PUBLISHER - Allowed <publisher-name> and <publisher-loc> to
+     repeat (as an unnamed-parenthetical) inside <publisher>.
+     This will allow co-publishers and publisher names and locations
+     in more than one language. Added to facilitate multiple
+     languages. Also added @specific-use and @xml:lang to
+     both publisher-name and publisher-loc.
+
+  8. ATTLIST PARAMETER ENTITIES - Changed the attribute lists
+     from using the same parameter entity (%day-atts;) to using:
+       - day    %day-atts;   (no change)
+       - month  %month-atts;
+       - season %season-atts;
+
+  7. ISBN - Added "isbn" as value in predefined list for
+    '@pub-id-type' (% pub-id-types)
+
+  6. TEXTUAL FORM - Added the following attributes: (new)
+       - @specific-use
+       - @xml:lang
+
+  5. NAME ALTERNATIVES - Created a new wrapper element for more
+     than one version of a personal name, for example, the name in
+     Japanese kana characters and a transliterated form of the name
+     in Latin alphabet, or a regular name and a search version
+     that transliterates umlauts to unaccented characters.
+      - new element <name-alternatives>
+      - new PE name-alternatives-model
+      - new PE name-alternatives-atts (currently null)
+
+  4. STRING NAME - Added the following attributes: (new)
+       - @content-type
+       - @specific-use
+       - @name-style
+       - @xml:lang
+
+  3. PERSON'S NAME STYLE
+       - Added the value "given-only" to the @name-style on <name>
+
+  2. PERSON'S NAME - Allowed <given-names> as an alternative
+     to <surname, given-names?) to accommodate the Indian
+     names that are only a given name.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE VALUES    -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE/PUBLICATION IDENTIFIER TYPES       -->
+<!--                    Values for the @pub-id attribute. Used:
+                        1) Within citations with the <pub-id> and 
+                        <object-id> elements to name the type of
+                        identifier (such as DOI) or the organization 
+                        or system that defined the identifier for the 
+                        identifier of the journal article or a cited 
+                        publication, such as a book or standard.
+                        2) Within article metadata with the
+                        <article-id>, <issue-id>, and <volume-id>
+                        elements to name the type of identifier or 
+                        identifying agency.
+                        4) Within many body elements to perform a 
+                        similar function for the <object-id> element.
+                                                                   -->
+<!ENTITY % pub-id-types  "accession | archive | ark | art-access-id | 
+                          arxiv | coden | doaj | doi | 
+                          handle | index | isbn | 
+                          manuscript | medline | mr | other | 
+                          pii | pmcid |  pmid | publisher-id | sici |
+                          std-designation | zbl |
+                          custom"                                    >
+                                                           
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR CONTENT MODELS      -->
+<!-- ============================================================= -->
+
+
+<!--                    ANY URI SCHEMA TYPE (as documentation)     -->
+<!--                    Indicates that in an XSD or RNG Schema, this
+                        element would be typed as the simple type
+                        'anyURI". This has no enforcement power in a 
+                        DTD, it is intended for human guidance.
+                        but is only for human guidance in a DTD   -->
+<!ENTITY % anyURI       "(#PCDATA)"                                 >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE VALUES    -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE/PUBLICATION IDENTIFIER TYPES       -->
+<!--                    Values for the @pub-id attribute. Used:
+                        1) Within citations with the <pub-id> and 
+                        <object-id> elements to name the type of
+                        identifier (such as DOI) or the organization 
+                        or system that defined the identifier for the 
+                        identifier of the journal article or a cited 
+                        publication, such as a book or standard.
+                        2) Within article metadata with the
+                        <article-id>, <issue-id>, and <volume-id>
+                        elements to name the type of identifier or 
+                        identifying agency.
+                        4) Within many body elements to perform a 
+                        similar function for the <object-id> element.
+                                                                   -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR FULL CONTENT MODELS -->
+<!-- ============================================================= -->
+
+
+<!--                    DATE ELEMENTS MODEL                        -->
+<!--                    The content models for elements that describe
+                        dates, such as Publication Date <pub-date>
+                        and History Dates <date>.                  -->
+<!ENTITY % date-model   "( ( (day?, month?) | season)?,
+                          year?, era?, string-date?)"                >
+
+
+<!--                    CONTENT MODEL FOR A STRUCTURAL SECTION     -->
+<!--                    The model for a section that requires that a
+                        section title be present, used for elements
+                        such as Section and Appendix.              -->
+<!ENTITY % sec-model    "(sec-meta?, label?, title, (%para-level;)*,
+                          (%sec-level;)*,
+                          (%sec-back-matter-mix;)* )"                >
+
+
+<!--                    CONTENT MODEL FOR A SECTION METADATA       -->
+<!--                    In some works, each section has a different
+                        author or some sections are authored by
+                        different contributors from the enclosing
+                        article. This wrapper element for
+                        section-level metadata is used to capture
+                        information such as those contributors.
+                                                                   -->
+<!ENTITY % sec-meta-model
+                        "((%id.class;)*, (%contrib-group.class;)*, 
+                          (%abstract.class;)*, (%kwd-group.class;)*,
+                          (%subj-group.class;)*,
+                          permissions?)"       >
+
+
+<!--                    CONTENT MODEL FOR AN UNTITLED SECTION      -->
+<!--                    The model for a section-like structure that
+                        may or may not have an initial title       -->
+<!ENTITY % sec-opt-title-model
+                        "(sec-meta?, label?, title?, (%para-level;)*,
+                          (%sec-level;)*,
+                          (%sec-back-matter-mix;)* )"                >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR MIXED CONTENT       -->
+<!-- ============================================================= -->
+
+
+<!--                    LINK ELEMENTS                              -->
+<!--                    Elements for use in the linking elements
+                        such as <xref>, <target>, and <ext-link>   -->
+<!ENTITY % link-elements
+                        "| %emphasis.class; | %phrase-content.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    PARAGRAPH ELEMENTS                         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <p>.
+                        Design Note: There is a major overlap between
+                        this parameter entity and the mix for elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a
+                        paragraph, but block elements such as quotes
+                        and lists may appear either within a
+                        paragraph or at the same level as a
+                        paragraph. This serves a requirement in a
+                        repository DTD, since some incoming material
+                        will have restricted such elements to only
+                        inside a paragraph, some incoming material
+                        will have restricted them to only outside a
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.
+                        Design Note: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % p-elements   "| %address-link.class; |
+                         %article-link.class; |
+                         %block-display.class; | %block-math.class; |
+                         %citation.class; |  %emphasis.class; |
+                         %funding.class; |  %inline-math.class; |
+                         %inline-display-noalt.class; |
+                         %list.class; | %math.class; |
+                         %phrase.class; | %rest-of-para.class; |
+                         %simple-link.class; |
+                         %subsup.class;"                             >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR TITLES              -->
+<!-- ============================================================= -->
+
+
+<!--                    TITLE ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <title>.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % title-elements
+                        "%simple-phrase; | %break.class;"            >
+
+
+<!--                    ALTERNATE TITLE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <alt-title>.
+                        An earlier version of this tag set used the
+                        parameter entity %title-elements; for many
+                        title elements including <alt-title>.      -->
+<!ENTITY % alt-title-elements
+                        "%title-elements;"                           >
+
+
+<!--                    TRANSLATED TITLE ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <trans-title>.
+                        An earlier version of this tag set used the
+                        parameter entity %title-elements; for many
+                        title elements including <trans-title>.    -->
+<!ENTITY % trans-title-elements
+                        "%title-elements;"                           >
+
+
+<!--                    TRANSLATED SUBTITLE ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <subtitle>.
+                        An earlier version of this tag set used the
+                        parameter entity %title-elements; for many
+                        title elements including <trans-subtitle>. -->
+<!ENTITY % trans-subtitle-elements
+                        "%title-elements;"                           >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR LINKING ATTRIBUTES  -->
+<!--                    THE FOLLOWING FEW ARE SHARED ATTRIBUTES    -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON ATTRIBUTES                          -->
+<!--                    These lists of attributes will be added to 
+                        nearly every element, in both the document 
+                        metadata and the document body, of the entire 
+                        Tag Set:
+                          - including table elements for both the 
+                              XHTML-inspired and OASIS-inspired
+                              table model elements
+                          - excluding only <mml:math> and 
+                              <xi:include> (whose namespaces JATS
+                              does not control).
+                           Great care should be taken to use these
+                        attributes judiciously, not as a shortcut to
+                        thinking through where an attribute should be
+                        used. Potential use cases include adding
+                        @xml:lang or some RDFa attribute to every 
+                        elements.                                  -->
+
+
+<!--                    BASE ATTRIBUTES                            -->
+<!--                    Holds all the common attributes except @id.
+                        Used to keep the two common attribute lists 
+                        in sync. To add a global attribute, modify
+                        this list.                                 -->
+<!ENTITY % jats-base-atts
+            "xml:base   CDATA                             #IMPLIED"  >
+
+
+<!--                    JATS COMMON ATTRIBUTES                     -->
+<!--                    Holds all the common attributes, as defined in
+                        the base attribute parameter entity, plus an
+                        optional @id.                              -->
+<!ENTITY % jats-common-atts
+            "id         ID                                #IMPLIED 
+             %jats-base-atts;"                                       >
+
+
+<!--                    JATS COMMON ATTRIBUTES (ID REQUIRED)       -->
+<!--                    Holds all the common attributes, as defined in
+                        the base attribute parameter entity, plus a 
+                        required @id.                              -->
+<!ENTITY % jats-common-atts-id-required
+            "id         ID                                #REQUIRED
+             %jats-base-atts;"                                       >
+
+
+
+<!--                    XLINK LINK ATTRIBUTES                      -->
+<!--                    Used for elements that are a link by
+                        definition, such as the <xref> element.    -->
+<!ENTITY % link-atts
+            "xmlns:xlink CDATA                            #IMPLIED
+             xlink:type  (simple)                         #IMPLIED
+             xlink:href  CDATA                            #REQUIRED 
+             xlink:role  CDATA                            #IMPLIED
+             xlink:title CDATA                            #IMPLIED
+             xlink:show  (embed | new | none | other | replace)
+                                                          #IMPLIED
+             xlink:actuate
+                         (none | onLoad | onRequest | other)
+                                                          #IMPLIED
+             hreflang    NMTOKEN                          #IMPLIED"  >
+
+
+
+<!--                    MIGHT LINK XLINK ATTRIBUTES                -->
+<!--                    Used for elements which may need to link to
+                        external sources or other objects within
+                        the document, but may not necessarily act
+                        as a link at all.  The attribute
+                        "xlink:href" identifies the object to which
+                        the link points.                           -->
+<!ENTITY % might-link-atts
+            "xmlns:xlink CDATA                            #IMPLIED
+             xlink:type  (simple)                         #IMPLIED
+             xlink:href  CDATA                            #IMPLIED
+             xlink:role  CDATA                            #IMPLIED
+             xlink:title CDATA                            #IMPLIED
+             xlink:show  (embed | new | none | other | replace)
+                                                          #IMPLIED
+             xlink:actuate
+                         (none | onLoad | onRequest | other)
+                                                          #IMPLIED
+             hreflang    NMTOKEN                          #IMPLIED"  >
+
+
+
+<!--                    CITATION ATTRIBUTES                        -->
+<!--                    Attributes for all two kinds of citations:
+                        <element-citation> and <mixed-citation>    -->
+<!ENTITY % citation-atts
+            "%jats-common-atts;                                        
+             publication-type
+                        CDATA                             #IMPLIED
+             publisher-type
+                        CDATA                             #IMPLIED
+             publication-format
+                        CDATA                             #IMPLIED
+             use-type   CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTES LISTS    -->
+<!--                    (ALPHABETICAL ORDER)                       -->
+<!-- ============================================================= -->
+
+
+<!--                    AFFILIATION ATTRIBUTES                     -->
+<!--                    Attributes for the <ack> element           -->
+<!ENTITY % ack-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ADDRESS ATTRIBUTES                         -->
+<!--                    Attributes for the <address> element       -->
+<!ENTITY % address-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ADDRESS LINE ATTRIBUTES                    -->
+<!--                    Attributes for the <addr-line> element     -->
+<!ENTITY % addr-line-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    AFFILIATION ATTRIBUTES                     -->
+<!--                    Attributes for the Affiliation <aff>
+                        element                                    -->
+<!ENTITY % aff-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    AFFILIATION ALTERNATIVES ATTRIBUTES        -->
+<!--                    Attributes for the <aff-alternatives>
+                        element                                    -->
+<!ENTITY % aff-alternatives-atts
+            "%jats-common-atts;"                                     >                                        
+
+
+<!--                    ALTERNATE TEXT ATTRIBUTES                  -->
+<!--                    Attributes for the <alt-text> element      -->
+<!ENTITY % alt-text-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ANONYMOUS ATTRIBUTES                       -->
+<!--                    Attributes for the <anonymous> element     -->
+<!ENTITY % anonymous-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ALTERNATIVES ATTRIBUTES                    -->
+<!--                    Attributes for the <alternatives> element  -->
+<!ENTITY % alternatives-atts
+            "%jats-common-atts;"                                     >                                        
+
+
+<!--                    ARTICLE TITLE ATTRIBUTES                   -->
+<!--                    Attributes for the <article-title> element -->
+<!ENTITY % article-title-atts
+            "%jats-common-atts;                                        
+             xml:lang   NMTOKEN                            #IMPLIED" >
+
+
+<!--                    ATTRIBUTION ATTRIBUTES                     -->
+<!--                    Attributes for the <attrib> element        -->
+<!ENTITY % attrib-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    BIOGRAPHY ATTRIBUTES                       -->
+<!--                    Attributes for <bio> element               -->
+<!ENTITY % bio-atts
+            "%jats-common-atts;                                        
+             rid        IDREFS                            #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    CITATION ALTERNATIVES ATTRIBUTES           -->
+<!--                    Attributes for the <citation-alternatives>
+                        element                                    -->
+<!ENTITY % citation-alternatives-atts
+            "%jats-common-atts;"                                     >                                        
+
+
+<!--                    CITY ATTRIBUTES                            -->
+<!--                    Attributes for the <city> element          -->
+<!ENTITY % city-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    COLLABORATION ATTRIBUTES                   -->
+<!--                    Attributes for <collab>                    -->
+<!ENTITY % collab-atts
+            "%jats-common-atts;                                        
+             collab-type
+                        CDATA                             #IMPLIED
+             symbol     CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    COLLABORATION ALTERNATIVES ATTRIBUTES      -->
+<!--                    Attributes for the <collab-alternatives>
+                        element                                    -->
+<!ENTITY % collab-alternatives-atts
+            "%jats-common-atts;"                                      >                                        
+
+
+<!--                    CONFERENCE DATE ATTRIBUTES                 -->
+<!--                    Attributes for the <conf-date> element     -->
+<!ENTITY % conf-date-atts
+            "%jats-common-atts;                                        
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONFERENCE LOCATION ATTRIBUTES             -->
+<!--                    Attributes for the <conf-loc> element      -->
+<!ENTITY % conf-loc-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONFERENCE NAME ATTRIBUTES                 -->
+<!--                    Attributes for the <conf-name> element.    -->
+<!ENTITY % conf-name-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONFERENCE SPONSOR ATTRIBUTES              -->
+<!--                    Attributes for the <conf-sponsor> element. -->
+<!ENTITY % conf-sponsor-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CONTRIBUTOR ATTRIBUTES                     -->
+<!--                    Attributes for the <contrib> element       -->
+<!ENTITY % contrib-atts
+            "%jats-common-atts;                                        
+             contrib-type
+                        CDATA                             #IMPLIED
+             corresp    (no | yes)                        #IMPLIED
+             equal-contrib
+                        (no | yes)                        #IMPLIED
+             deceased   (no | yes)                        #IMPLIED
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    CONTRIBUTOR GROUP ATTRIBUTES               -->
+<!--                    Attributes for the <contrib-group> element -->
+<!ENTITY % contrib-group-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    CONTRIBUTOR IDENTIFIER ATTRIBUTES          -->
+<!--                    Attributes for the <contrib-id> 
+                        element.                                   -->
+<!ENTITY % contrib-id-atts
+            "%jats-common-atts;                                        
+             contrib-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             authenticated
+                        (true | false)                    'false'
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    COPYRIGHT HOLDER ATTRIBUTES                -->
+<!--                    Attributes for the <copyright-holder>
+                        element.                                   -->
+<!ENTITY % copyright-holder-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    COPYRIGHT STATEMENT ATTRIBUTES             -->
+<!--                    Attributes for the <copyright-statement>
+                        element.                                   -->
+<!ENTITY % copyright-statement-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    COPYRIGHT YEAR ATTRIBUTES                  -->
+<!--                    Attributes for the <copyright-year>
+                        element                                    -->
+<!ENTITY % copyright-year-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    COUNTRY ATTRIBUTES                         -->
+<!--                    Attributes for the <country> element       -->
+<!ENTITY % country-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             country    CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CUSTOM METADATA ATTRIBUTES                 -->
+<!--                    Attributes for the <custom-meta> element   -->
+<!ENTITY % custom-meta-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    CUSTOM METADATA GROUP ATTRIBUTES           -->
+<!--                    Attributes for the <custom-meta-group>
+                        element                                    -->
+<!ENTITY % custom-meta-group-atts
+            "%jats-common-atts;                                                                                    content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+        
+
+
+<!--                    DATE (HISTORICAL) ATTRIBUTES               -->
+<!--                    Attributes for the <date> element          -->
+<!ENTITY % date-atts
+            "%jats-common-atts;                                        
+             date-type  CDATA                             #IMPLIED
+             publication-format
+                        CDATA                             #IMPLIED
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    DAY ATTRIBUTES                             -->
+<!--                    Attributes for the <day> element           -->
+<!ENTITY % day-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEFINITION LIST: DEFINITION ATTRIBUTES     -->
+<!--                    Attribute list for the <def> element       -->
+<!ENTITY % def-atts
+            "%jats-common-atts;                                        
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEGREES ATTRIBUTES                         -->
+<!--                    Attributes for the <degrees> element       -->
+<!ENTITY % degrees-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ELEMENT CITATION ATTRIBUTES                -->
+<!--                    Attributes for <element-citation>          -->
+<!ENTITY % element-citation-atts
+            "%citation-atts;"                                        >
+
+
+<!--                    ELECTRONIC LOCATION IDENTIFIER ATTRIBUTES
+                        Attribute list for the <elocation-id>
+                        element                                    -->
+<!ENTITY % elocation-id-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             seq        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    EMAIL ATTRIBUTES                           -->
+<!--                    Attribute list for the <email> element     -->
+<!ENTITY % email-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    ERA ATTRIBUTES                             -->
+<!--                    Attributes for the <era> element           -->
+<!ENTITY % era-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ET AL. ATTRIBUTES                          -->
+<!--                    Attribute list for the <etal> element      -->
+<!ENTITY % etal-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    EXTERNAL LINK ATTRIBUTES                   -->
+<!--                    Attribute list for external links, such as
+                        <ext-link>                                 -->
+<!ENTITY % ext-link-atts
+            "%jats-common-atts;                                        
+             ext-link-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    FAX ATTRIBUTES                             -->
+<!--                    Attribute list for the <fax> element       -->
+<!ENTITY % fax-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    FIRST PAGE ATTRIBUTES                      -->
+<!--                    Attribute list for the <fpage> element     -->
+<!ENTITY % fpage-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             seq        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    FREE TO READ ATTRIBUTES                    -->
+<!--                    Attributes for the ALI namespaced
+                        <ali:free_to_read> element                 -->
+<!ENTITY % free-to-read-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             end_date   CDATA                             #IMPLIED
+             start_date CDATA                             #IMPLIED
+             %ali.xmlns.attrib;"                                     >
+
+
+<!--                    GIVEN NAMES ATTRIBUTES                     -->
+<!--                    Attribute list for the <given-names> element
+                                                                   -->
+<!ENTITY % given-names-atts
+            "%jats-common-atts;                                        
+             initials  CDATA                             #IMPLIED"  >
+
+
+<!--                    INSTITUTION ATTRIBUTES                     -->
+<!--                    Attribute list for <institution>           -->
+<!ENTITY % institution-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    INSTITUTION IDENTIFIER ATTRIBUTES          -->
+<!--                    Attribute list for <institution-id>        -->
+<!ENTITY % institution-id-atts
+            "%jats-common-atts;                                        
+             institution-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    INSTITUTION WRAPPER ATTRIBUTES             -->
+<!--                    Attributes for the <institution-wrap>
+                        element                                    -->
+<!ENTITY % institution-wrap-atts
+            "%jats-common-atts;"                                          >                                        
+
+
+<!--                    ISBN ATTRIBUTES                            -->
+<!--                    Attributes for the <isbn> element          -->
+<!ENTITY % isbn-atts
+            "%jats-common-atts;                                        
+             publication-format
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ISSN ATTRIBUTES                            -->
+<!--                    Attribute list for the <issn> element      -->
+<!ENTITY % issn-atts
+            "%jats-common-atts;                                        
+             pub-type   CDATA                             #IMPLIED
+             publication-format
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ISSN-L (INKING ISSN) ATTRIBUTES            -->
+<!--                    Attribute list for the <issn-l> element    -->
+<!ENTITY % issn-l-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ISSUE ATTRIBUTES                           -->
+<!--                    Attribute list for the <issue> element     -->
+<!ENTITY % issue-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             seq        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ISSUE IDENTIFIER ATTRIBUTES                -->
+<!--                    Attributes for the <issue-id> element      -->
+<!ENTITY % issue-id-atts
+            "%jats-common-atts;                                        
+             pub-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    ISSUE PART ATTRIBUTES                      -->
+<!--                    Attribute list for <issue-part> element    -->
+<!ENTITY % issue-part-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ISSUE SPONSOR ATTRIBUTES                   -->
+<!--                    Attribute list for <issue-sponsor> element -->
+<!ENTITY % issue-sponsor-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ISSUE SUBTITLE ATTRIBUTES                  -->
+<!--                    Attribute list for the <issue-subtitle> 
+                        element                                    -->
+<!ENTITY % issue-subtitle-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    ISSUE TITLE ATTRIBUTES                     -->
+<!--                    Attribute list for the <issue-title> 
+                        element                                    -->
+<!ENTITY % issue-title-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    JOURNAL IDENTIFIER ATTRIBUTES              -->
+<!--                    Attribute list for journal identifier
+                        <journal-id> element                       -->
+<!ENTITY % journal-id-atts
+            "%jats-common-atts;                                        
+             journal-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    LABEL ATTRIBUTES                           -->
+<!--                    Attributes for the <label> element         -->
+<!ENTITY % label-atts
+            "%jats-common-atts;                                        
+             alt        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    LICENSE ATTRIBUTES                         -->
+<!--                    Attributes for the <license> element       -->
+<!ENTITY % license-atts
+            "%jats-common-atts;                                        
+             license-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    LICENSE PARAGRAPH ATTRIBUTES               -->
+<!--                    Attributes for the <license> element       -->
+<!ENTITY % license-p-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    LICENSE REFERENCE ATTRIBUTES               -->
+<!--                    Attributes for the ALI namespaced
+                        <ali:license_ref> element                  -->
+<!ENTITY % license-ref-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             start_date CDATA                             #IMPLIED
+             %ali.xmlns.attrib;"                                     >
+
+
+<!--                    LONG DESCRIPTION ATTRIBUTES                -->
+<!--                    Attributes for the <long-desc> element     -->
+<!ENTITY % long-desc-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    LPAGE ATTRIBUTES                           -->
+<!--                    Attributes for the <lpage> element         -->
+<!ENTITY % lpage-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    METADATA NAME (CUSTOM) ATTRIBUTES          -->
+<!--                    Attributes for <meta-name> element         -->
+<!ENTITY % meta-name-atts
+            "%jats-common-atts;"                                     >                                       
+
+
+<!--                    METADATA VALUE (CUSTOM) ATTRIBUTES          -->
+<!--                    Attributes for <meta-value> element         -->
+<!ENTITY % meta-value-atts
+            "%jats-common-atts;"                                       >                                       
+
+
+<!--                    MIXED CITATION ATTRIBUTES                  -->
+<!--                    Attributes for <mixed-citation> element    -->
+<!ENTITY % mixed-citation-atts
+            "%citation-atts;"                                        >
+
+
+<!--                    MONTH ATTRIBUTES                           -->
+<!--                    Attributes for the <month> element         -->
+<!ENTITY % month-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    NAME ATTRIBUTES                            -->
+<!--                    Attribute list for the <name> element      -->
+<!ENTITY % name-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             name-style (western | eastern | islensk |
+                         given-only)                      'western'
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang  NMTOKEN                            #IMPLIED"  >
+
+
+<!--                    NAME ALTERNATIVES ATTRIBUTES               -->
+<!--                    Attributes for the <name-alternatives>
+                        element                                    -->
+<!ENTITY % name-alternatives-atts
+            "%jats-common-atts;"                                      >                                       
+
+
+<!--                    NOTES ATTRIBUTES                           -->
+<!--                    Attribute list for the <note> element      -->
+<!ENTITY % notes-atts
+            "%jats-common-atts;                                        
+             notes-type CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    OBJECT IDENTIFIER ATTRIBUTES               -->
+<!--                    Attributes for the <object-id> element     -->
+<!ENTITY % object-id-atts
+            "%jats-common-atts;                                        
+             pub-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ON BEHALF OF ATTRIBUTES                    -->
+<!--                    Attributes for the <on-behalf-of> element  -->
+<!ENTITY % on-behalf-of-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PAGE RANGE ATTRIBUTES                      -->
+<!--                    Attributes for the <page-range> element    -->
+<!ENTITY % page-range-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PERMISSIONS ATTRIBUTES                     -->
+<!--                    Attributes for the <permission> element    -->
+<!ENTITY % permissions-atts
+            "%jats-common-atts;"                                     >                                        
+
+
+<!--                    PHONE ATTRIBUTES                           -->
+<!--                    Attributes for the <phone> element         -->
+<!ENTITY % phone-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    POSTAL CODE ATTRIBUTES                     -->
+<!--                    Attributes for the <postal-code> element   -->
+<!ENTITY % postal-code-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PREFIX ATTRIBUTES                          -->
+<!--                    Attributes for the <prefix> element        -->
+<!ENTITY % prefix-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PRICE ATTRIBUTES                           -->
+<!--                    Attributes for the <price> element         -->
+<!ENTITY % price-atts
+            "%jats-common-atts;                                        
+             currency   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PUBLISHER ATTRIBUTES                       -->
+<!--                    Attributes for the <publisher> element     -->
+<!ENTITY % publisher-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    PUBLISHER LOCATION ATTRIBUTES              -->
+<!--                    Attributes for the <publisher-loc> element -->
+<!ENTITY % publisher-loc-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang  NMTOKEN                            #IMPLIED"  >
+
+
+<!--                    PUBLISHER NAME ATTRIBUTES                  -->
+<!--                    Attributes for the <publisher-name> element-->
+<!ENTITY % publisher-name-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang  NMTOKEN                            #IMPLIED"  >
+
+
+<!--                    RELATED ARTICLE ATTRIBUTES                 -->
+<!--                    Attributes for <related-article>           -->
+<!ENTITY % related-article-atts
+            "%jats-common-atts;                                        
+             related-article-type
+                        CDATA                             #REQUIRED
+             ext-link-type
+                       CDATA                              #IMPLIED
+             vol       CDATA                              #IMPLIED
+             page      CDATA                              #IMPLIED
+             issue     CDATA                              #IMPLIED
+             elocation-id
+                       CDATA                              #IMPLIED
+             journal-id
+                       CDATA                              #IMPLIED
+             journal-id-type
+                        CDATA                             #IMPLIED
+             specific-use
+                       CDATA                              #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    ROLE ATTRIBUTES                            -->
+<!--                    Attributes for the <role> element          -->
+<!ENTITY % role-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             degree-contribution
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SEASON ATTRIBUTES                          -->
+<!--                    Attributes for the <season> element        -->
+<!ENTITY % season-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SIGNATURE ATTRIBUTES                       -->
+<!--                    Attributes for the <sig> element           -->
+<!ENTITY % sig-atts
+            "%jats-common-atts;                                        
+             rid        IDREFS                            #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SIGNATURE BLOCK ATTRIBUTES                 -->
+<!--                    Attributes for the <sig-block> element     -->
+<!ENTITY % sig-block-atts
+            "%jats-common-atts;                                        
+             rid       IDREFS                            #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SIZE ATTRIBUTES                            -->
+<!--                    Attribute list for the <size> element      -->
+<!ENTITY % size-atts
+            "%jats-common-atts;                                        
+             units      CDATA                             #REQUIRED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STATE ATTRIBUTES                           -->
+<!--                    Attributes for the <state> element         -->
+<!ENTITY % state-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STRING DATE ATTRIBUTES                     -->
+<!--                    Attributes for the <string-date> element   -->
+<!ENTITY % string-date-atts
+            "%jats-common-atts;                                        
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STRING NAME ATTRIBUTES                     -->
+<!--                    Attribute list for the <string-name> element
+                                                                   -->
+<!ENTITY % string-name-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             name-style
+                        (western | eastern | islensk | given-only)
+                                                          'western'
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SUFFIX ATTRIBUTES                          -->
+<!--                    Attributes for the <suffix> element        -->
+<!ENTITY % suffix-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SUPPLEMENT ATTRIBUTES                      -->
+<!--                    Attributes for the <supplement> element    -->
+<!ENTITY % supplement-atts
+            "%jats-common-atts;                                        
+             supplement-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SURNAME ATTRIBUTES                         -->
+<!--                    Attribute list for the <surname> element   -->
+<!ENTITY % surname-atts
+            "%jats-common-atts;                                        
+             initials  CDATA                              #IMPLIED"  >
+
+
+<!--                    TEXTUAL FORM ATTRIBUTES                    -->
+<!--                    Attributes for the <textual-form> element  -->
+<!ENTITY % textual-form-atts
+            "%jats-common-atts;                                        
+             specific-use
+                       CDATA                              #IMPLIED
+             xml:lang  NMTOKEN                            #IMPLIED"  >
+
+
+<!--                    TITLE ATTRIBUTES                           -->
+<!--                    Attributes for the <title> element         -->
+<!ENTITY % title-atts
+            "%jats-common-atts;                                        
+             content-type
+                       CDATA                              #IMPLIED
+             specific-use
+                       CDATA                              #IMPLIED"  >
+
+
+<!--                    TRANSLATED SUBTITLE ATTRIBUTES             -->
+<!--                    Attributes for the <trans-subtitle>
+                        element                                    -->
+<!ENTITY % trans-subtitle-atts
+            "%jats-common-atts;                                        
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    TRANSLATED TITLE ATTRIBUTES                -->
+<!--                    Attribute list for the <trans-title>       -->
+<!ENTITY % trans-title-atts
+            "%jats-common-atts;                                        
+             content-type
+                       CDATA                              #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    TRANSLATED TITLE GROUP ATTRIBUTES          -->
+<!--                    Attribute list for the <trans-title-group> -->
+<!ENTITY % trans-title-group-atts
+            "%jats-common-atts;                                        
+             content-type
+                       CDATA                              #IMPLIED
+             specific-use
+                       CDATA                              #IMPLIED
+             xml:lang  NMTOKEN                            #IMPLIED"  >
+
+
+<!--                    URI ATTRIBUTES                             -->
+<!--                    Attributes for the <uri> element           -->
+<!ENTITY % uri-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    VOLUME NUMBER ATTRIBUTES                   -->
+<!--                    Attribute list for the <volume> element    -->
+<!ENTITY % volume-atts
+            "%jats-common-atts;                                        
+             seq        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    VOLUME IDENTIFIER ATTRIBUTES               -->
+<!--                    Attributes for the <volume-id> element     -->
+<!ENTITY % volume-id-atts
+            "%jats-common-atts;                                        
+             pub-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    VOLUME ISSUE GROUPING ATTRIBUTES           -->
+<!--                    Attribute list for the <volume-issue-group>
+                        element                                    -->
+<!ENTITY % volume-issue-group-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    VOLUME SERIES ATTRIBUTES                   -->
+<!--                    Attribute list for the <volume-series>
+                        element                                    -->
+<!ENTITY % volume-series-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    YEAR ATTRIBUTES                            -->
+<!--                    Attributes for the <year> element          -->
+<!ENTITY % year-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    METADATA USED BY MORE THAN ONE CLASS       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    NISO ACCESS AND INDICATOR ELEMENTS         -->
+<!-- ============================================================= -->
+
+
+<!--                    FREE TO READ (NISO ALI) MODEL              -->
+<!--                    Content model for the ALI namespaced  
+                        <ali:free_to_read> element.                -->
+<!ENTITY % free-to-read-model
+                        "EMPTY"                                      >
+
+
+<!--                    FREE TO READ (NISO ALI)                    -->
+<!--                    An EMPTY element whose presence indicates 
+                        that a document or portion of a document 
+                        is free to be read. 
+                        Remarks: Defined in "NISO Access License and 
+                        Indicators (ALI) NISO RP-22-2015".    
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ali:free_to_read
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ali:free_to_read
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ali:free_to_read
+                                                                   -->
+<!ELEMENT  ali:free_to_read 
+                        %free-to-read-model;                         >
+<!ATTLIST  ali:free_to_read
+             %free-to-read-atts;                                     >
+
+
+<!--                    LICENSE REFERENCE (NISO ALI) MODEL         -->
+<!--                    Content model for the ALI namespaced  
+                        <ali:license_ref> element.                 -->
+<!ENTITY % license-ref-model
+                        "%anyURI;"                                   >
+
+
+<!--                    LICENSE REFERENCE (NISO ALI)               -->
+<!--                    A URI that is a pointer to a public license
+                        or waiver. If the element has content, it 
+                        must be a URI.
+                        Remarks: Defined in "NISO Access License and 
+                        Indicators (ALI) NISO RP-22-2015".    
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ali:license_ref
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ali:license_ref
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ali:license_ref
+                                                                   -->
+<!ELEMENT  ali:license_ref  
+                        %license-ref-model;                          >
+<!ATTLIST  ali:license_ref
+             %license-ref-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    CONTRIBUTOR GROUP (AUTHOR/EDITOR) ELEMENTS -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR GROUP MODEL                    -->
+<!--                    Content model for the <contrib-group>
+                        element                                    -->
+<!ENTITY % contrib-group-model
+                        "( (%contrib.class;)+,
+                           (%contrib-info.class;)* )"               >
+
+
+<!--                    CONTRIBUTOR GROUP                          -->
+<!--                    Wrapper element for information concerning
+                        a grouping of contributors, such as the
+                        primary authors
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=contrib-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=contrib-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=contrib-group
+                                                                   -->
+<!ELEMENT  contrib-group
+             %contrib-group-model;                                   >
+<!ATTLIST  contrib-group
+             %contrib-group-atts;                                    >
+
+
+<!--                    CONTRIBUTOR MODEL                          -->
+<!--                    Content model for the <contrib> element    -->
+<!ENTITY % contrib-model
+                        "((%contrib-id.class;)*, (%name.class;)*,
+                          (%degree.class; | %contrib-info.class;)* )">
+
+
+<!--                    CONTRIBUTOR                                -->
+<!--                    Wrapper element to contain the information
+                        about a single contributor, for example an
+                        author or editor.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=contrib
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=contrib
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=contrib
+                                                                   -->
+<!ELEMENT  contrib      %contrib-model;                              >
+<!ATTLIST  contrib
+             %contrib-atts;                                          >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON COPYRIGHT/PERMISSION ELEMENTS       -->
+<!-- ============================================================= -->
+
+
+<!--                    COPYRIGHT HOLDER ELEMENTS                  -->
+<!--                    Elements to be mixed with data characters
+                        inside the content model for the
+                        <copyright-holder> element.                -->
+<!ENTITY % copyright-holder-elements
+                        "| %institution-wrap.class; | %subsup.class;">
+
+
+<!--                    COPYRIGHT HOLDER                           -->
+<!--                    Name of the organizational or personal
+                        entity that holds the copyright.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=copyright-holder
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=copyright-holder
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=copyright-holder
+                                                                   -->
+<!ELEMENT  copyright-holder
+                        (#PCDATA %copyright-holder-elements;)*       >
+<!ATTLIST  copyright-holder
+             %copyright-holder-atts;                                 >
+
+
+<!--                    COPYRIGHT STATEMENT ELEMENTS               -->
+<!--                    Content model for <copyright-statement>    -->
+<!ENTITY % copyright-statement-elements
+                        "| %address-link.class; | %emphasis.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    COPYRIGHT STATEMENT                        -->
+<!--                    Copyright notice or statement, suitable for
+                        printing or display. Within the statement the
+                        copyright year should be identified, if
+                        expected to be displayed.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=copyright-statement
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=copyright-statement
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=copyright-statement
+                                                                   -->
+<!ELEMENT  copyright-statement
+                        (#PCDATA %copyright-statement-elements;)*    >
+<!ATTLIST  copyright-statement
+             %copyright-statement-atts;                              >
+
+
+<!--                    COPYRIGHT YEAR                             -->
+<!--                    Year of the copyright. Need not be used, if,
+                        for example, having the year as part of the
+                        copyright statement is sufficient.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=copyright-year
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=copyright-year
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=copyright-year
+                                                                   -->
+<!ELEMENT  copyright-year
+                        (#PCDATA)                                    >
+<!ATTLIST  copyright-year
+             %copyright-year-atts;                                   >
+
+
+<!--                    LICENSE MODEL                              -->
+<!--                    Content model for an <license> element     -->
+<!ENTITY % license-model
+                        "((%license-p.class;)+)"                     >
+
+
+<!--                    LICENSE INFORMATION                        -->
+<!--                    The set of conditions under which people are
+                        allowed to use this article or other
+                        license-related information or restrictions.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=license
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=license
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=license
+                                                                   -->
+<!ELEMENT  license      %license-model;                              >
+<!ATTLIST  license
+             %license-atts;                                          >
+
+
+<!--                    LICENSE PARAGRAPH ELEMENTS                 -->
+<!--                    Elements that can be included with the text
+                        inside a <license-p> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %p-elements; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % license-p-elements
+                        "%p-elements; | %price.class;"               >
+
+
+<!--                    LICENSE PARAGRAPH                          -->
+<!--                    Paragraphs of text within the description of
+                        a <license>. Not defined as an ordinary
+                        paragraph, so that it can have special
+                        content.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=license-p
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=license-p
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=license-p
+                                                                   -->
+<!ELEMENT  license-p    (#PCDATA %license-p-elements;)*              >
+<!ATTLIST  license-p
+             %license-p-atts;                                        >
+
+
+<!--                    PERMISSIONS MODEL                          -->
+<!--                    Model for <permissions> wrapper element    -->
+<!ENTITY % permissions-model
+                        "(copyright-statement*, copyright-year*,
+                          copyright-holder*, (%license.class;)*)"    >
+
+
+<!--                    PERMISSIONS                                -->
+<!--                    Wrapper element to hold the copyright
+                        information, license material, and any
+                        future similar metadata.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=permissions
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=permissions
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=permissions
+                                                                   -->
+<!ELEMENT  permissions  %permissions-model;                          >
+<!ATTLIST  permissions
+             %permissions-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON METADATA/BIBLIOGRAPHIC ELEMENTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE TITLE ELEMENTS                     -->
+<!--                    Elements that can be included with the text
+                        inside an <article-title> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % article-title-elements
+                        "%simple-phrase; | %break.class;"            >
+
+
+<!--                    ARTICLE TITLE                              -->
+<!--                    The title of the article in the language
+                        in which the article was originally
+                        published
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=article-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=article-title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=article-title
+                                                                   -->
+<!ELEMENT  article-title
+                        (#PCDATA %article-title-elements;)*          >
+<!ATTLIST  article-title
+             %article-title-atts;                                    >
+
+
+<!--                    AFFILIATION ELEMENTS                       -->
+<!--                    Elements for use in the <aff> element      -->
+<!ENTITY % aff-elements "| %address.class; | %address-link.class; |
+                         %article-link.class; | %break.class; |
+                         %emphasis.class; | %label.class; |
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!--                    AFFILIATION                                -->
+<!--                    Name of a institution or organization such as
+                        a university or corporation.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=aff
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=aff
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=aff
+                                                                   -->
+<!ELEMENT  aff          (#PCDATA %aff-elements;)*                    >
+<!ATTLIST  aff
+             %aff-atts;                                              >
+
+
+<!--                    AFFILIATION ALTERNATIVES MODEL             -->
+<!--                    Content model for the element
+                        <aff-alternatives>                         -->
+<!ENTITY % aff-alternatives-model
+                        "(aff+)"                                     >
+
+
+<!--                    AFFILIATION ALTERNATIVES                   -->
+<!--                    Container element to hold one or more
+                        representations of a single affiliation, for
+                        example the name of an institution in two
+                        languages or two scripts.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=aff-alternatives
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=aff-alternatives
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=aff-alternatives
+                                                                   -->
+<!ELEMENT  aff-alternatives
+                        %aff-alternatives-model;                     >
+<!ATTLIST  aff-alternatives
+             %aff-alternatives-atts;                                 >
+
+
+<!--                    CONFERENCE DATE ELEMENTS                   -->
+<!--                    Elements for use in the <conf-date> element-->
+<!ENTITY % conf-date-elements
+                        ""                                           >
+
+
+<!--                    CONFERENCE DATE                            -->
+<!--                    The date(s) on which the conference was held.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-date
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-date
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-date
+                                                                   -->
+<!ELEMENT  conf-date    (#PCDATA %conf-date-elements;)*              >
+<!ATTLIST  conf-date
+             %conf-date-atts;                                        >
+
+
+<!--                    CONFERENCE LOCATION ELEMENTS               -->
+<!--                    Elements for use in the <conf-loc> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-loc-elements
+                        "%simple-text; | %address.class;"            >
+
+
+<!--                    CONFERENCE LOCATION                        -->
+<!--                    The physical location(s) of the conference.
+                        This may include a city, a country, or a
+                        campus or organization location if that is
+                        the only location available.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-loc
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-loc
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-loc
+                                                                   -->
+<!ELEMENT  conf-loc     (#PCDATA %conf-loc-elements;)*               >
+<!ATTLIST  conf-loc
+             %conf-loc-atts;                                         >
+
+
+<!--                    CONFERENCE NAME ELEMENTS                   -->
+<!--                    Elements for use in the <conf-name> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-name-elements
+                        "%simple-text;"                            >
+
+
+<!--                    CONFERENCE NAME                            -->
+<!--                    The full name of the conference, including any
+                        qualifiers such as "43rd Annual".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-name
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-name
+                                                                   -->
+<!ELEMENT  conf-name    (#PCDATA %conf-name-elements;)*              >
+<!ATTLIST  conf-name
+             %conf-name-atts;                                        >
+
+
+<!--                    CONFERENCE SPONSOR  ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference sponsor.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-sponsor-elements
+                        "%simple-text; | %institution-wrap.class;"   >
+
+
+<!--                    CONFERENCE SPONSOR                         -->
+<!--                    One organization that sponsored the
+                        conference. If more than one organization
+                        sponsored the conference, multiple
+                        <conf-sponsor> elements should be used.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=conf-sponsor
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=conf-sponsor
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=conf-sponsor
+                                                                   -->
+<!ELEMENT  conf-sponsor (#PCDATA %conf-sponsor-elements;)*           >
+<!ATTLIST  conf-sponsor
+             %conf-sponsor-atts;                                     >
+
+
+<!--                    OBJECT IDENTIFIER                          -->
+<!--                    Used to record an identifier such as a DOI
+                        for an interior element such as an <abstract>
+                        or <figure>.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=object-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=object-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=object-id
+                                                                   -->
+<!ELEMENT  object-id    (#PCDATA)                                    >
+<!ATTLIST  object-id
+             %object-id-atts;                                        >
+
+
+<!--                    ISBN ELEMENTS                              -->
+<!--                    Elements for use with data characters inside
+                        the model for the <isbn> element           -->
+<!ENTITY % isbn-elements
+                        ""                                           >
+
+
+<!--                    ISBN                                       -->
+<!--                    International Standard Book Number
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=isbn
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=isbn
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=isbn
+                                                                   -->
+<!ELEMENT  isbn         (#PCDATA %isbn-elements;)*                   >
+<!ATTLIST  isbn
+             %isbn-atts;                                             >
+
+
+<!--                    ISSN ELEMENTS                              -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issue> element          -->
+<!ENTITY % issn-elements
+                        ""                                           >
+
+
+<!--                    ISSN                                       -->
+<!--                    International Standard Serial Number
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issn
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issn
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issn
+                                                                   -->
+<!ELEMENT  issn         (#PCDATA %issn-elements;)*                   >
+<!ATTLIST  issn
+             %issn-atts;                                             >
+
+
+<!--                    ISSN-L ELEMENTS                            -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issn-l> element         -->
+<!ENTITY % issn-l-elements
+                        ""                                           >
+
+
+<!--                    ISSN LINKING                               -->
+<!--                    International Standard Linking Serial Number
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issn-l
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issn-l
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issn-l
+                                                                   -->
+<!ELEMENT  issn-l       (#PCDATA %issn-l-elements;)*                 >
+<!ATTLIST  issn-l
+             %issn-l-atts;                                           >
+
+
+<!--                    ISSUE ELEMENTS                             -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issue> element          -->
+<!ENTITY % issue-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ISSUE NUMBER                               -->
+<!--                    The issue number, issue name, or other
+                        identifier of an issue of a journal that
+                        is displayed or printed with the issue.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issue
+                                                                   -->
+<!ELEMENT  issue        (#PCDATA %issue-elements;)*                  >
+<!ATTLIST  issue
+             %issue-atts;                                            >
+
+
+<!--                    ISSUE IDENTIFIER                           -->
+<!--                    Used to record an identifier such as a DOI
+                        that describes an entire issue of a
+                        journal
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issue-id
+                                                                   -->
+<!ELEMENT  issue-id     (#PCDATA)                                    >
+<!ATTLIST  issue-id
+             %issue-id-atts;                                         >
+
+
+<!--                    ISSUE PART ELEMENTS                        -->
+<!--                    Elements that can be added to the text
+                        within the element <issue-part>            -->
+<!ENTITY % issue-part-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ISSUE PART                         -->
+<!--                    A publisher may split an issue into two or
+                        more separately bound or separately issued
+                        parts. This element holds the identifiers
+                        (titles, part numbers, etc.) for those
+                        publishing components.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue-part
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue-part
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issue-part
+                                                                   -->
+<!ELEMENT  issue-part   (#PCDATA %issue-part-elements;)*             >
+<!ATTLIST  issue-part
+             %issue-part-atts;                                       >
+
+
+<!--                    ISSUE SPONSOR ELEMENTS                     -->
+<!--                    Elements for use in the <issue-sponsor>
+                        element                                    -->
+<!ENTITY % issue-sponsor-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ISSUE TITLE                                -->
+<!--                    Used to record the sponsor for an issue of
+                        the journal
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue-sponsor
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue-sponsor
+                                                                   -->
+<!ELEMENT  issue-sponsor
+                        (#PCDATA %issue-sponsor-elements;)*          >
+<!ATTLIST  issue-sponsor
+             %issue-sponsor-atts;                                    >
+
+
+<!--                    ISSUE SUBTITLE ELEMENTS                    -->
+<!--                    Elements for use in the <issue-subtitle>
+                        element                                    -->
+<!ENTITY % issue-subtitle-elements
+                        "%just-rendition;"                           >
+
+<!--                    ISSUE SUBTITLE                             -->
+<!--                    Used to record one or more subtitles for
+                        an issue
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue-subtitle
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue-subtitle
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issue-subtitle
+                                                                   -->
+<!ELEMENT  issue-subtitle  
+                        (#PCDATA %issue-subtitle-elements;)*         >
+<!ATTLIST  issue-subtitle
+             %issue-subtitle-atts;                                   >
+
+
+<!--                    ISSUE TITLE ELEMENTS                       -->
+<!--                    Elements for use in the <issue-title> element
+                                                                   -->
+<!ENTITY % issue-title-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ISSUE TITLE                                -->
+<!--                    Used to record the theme or special issue
+                        title for an issue of the journal
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=issue-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=issue-title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=issue-title
+                                                                   -->
+<!ELEMENT  issue-title  (#PCDATA %issue-title-elements;)*            >
+<!ATTLIST  issue-title
+             %issue-title-atts;                                      >
+
+
+<!--                    JOURNAL IDENTIFIER                         -->
+<!--                    Short code that represents the journal; used
+                        as an alternative to or short form of the
+                        journal title; used for identification of
+                        the journal domain.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=journal-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=journal-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=journal-id
+-->
+<!ELEMENT  journal-id   (#PCDATA)                                    >
+<!ATTLIST  journal-id
+             %journal-id-atts;                                       >
+
+
+<!--                    ROLE ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <role>
+                        Design Note: All inline mixes begin with an
+                        OR bar; since %rendition-plus; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % role-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    ROLE OR FUNCTION TITLE OF CONTRIBUTOR      -->
+<!--                    A title or the role of a contributor
+                        (such as an author) in this work. For example,
+                        Editor-in-Chief, Contributor, Chief
+                        Scientist, Photographer, Research Associate,
+                        etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=role
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=role
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=role
+                                                                   -->
+<!ELEMENT  role         (#PCDATA %role-elements;)*                   >
+<!ATTLIST  role
+             %role-atts;                                             >
+
+
+<!--                    TRANSLATED TITLE GROUP MODEL               -->
+<!--                    Content model for the element
+                        <trans-title-group>                        -->
+<!ENTITY % trans-title-group-model
+                        "(trans-title, trans-subtitle*)"             >
+
+
+<!--                    TRANSLATED TITLE GROUP                     -->
+<!--                    Container element for all translated, and
+                        transliterated journal titles.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=trans-title-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=trans-title-group
+                                                                   -->
+<!ELEMENT  trans-title-group
+                        %trans-title-group-model;                    >
+<!ATTLIST  trans-title-group
+             %trans-title-group-atts;                                >
+
+
+<!--                    TRANSLATED SUBTITLE                        -->
+<!--                    An alternate version of an article subtitle
+                        that has been translated out of the original
+                        language of the article subtitle <subtitle>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=trans-subtitle
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=trans-subtitle
+                                                                   -->
+<!ELEMENT  trans-subtitle
+                        (#PCDATA %trans-subtitle-elements;)*         >
+<!ATTLIST  trans-subtitle
+             %trans-subtitle-atts;                                   >
+
+
+<!--                    TRANSLATED TITLE                           -->
+<!--                    An alternate version of the title that has
+                        been translated into a language other than
+                        that of the original article title
+                        <article-title>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=trans-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=trans-title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=trans-title
+                                                                   -->
+<!ELEMENT  trans-title  (#PCDATA %trans-title-elements;)*            >
+<!ATTLIST  trans-title
+            %trans-title-atts;                                       >
+
+
+<!--                    VOLUME NUMBER ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <volume>                                 -->
+<!ENTITY % volume-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    VOLUME NUMBER                              -->
+<!--                    NEW DEFINITION FOR RELEASE 2.0:
+                        The volume number, volume name, or other
+                        identifier of an volume of a journal that
+                        is displayed or printed with the volume.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=volume
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=volume
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=volume
+                                                                   -->
+<!ELEMENT  volume       (#PCDATA %volume-elements;)*                 >
+<!ATTLIST  volume
+            %volume-atts;                                            >
+
+
+<!--                    VOLUME IDENTIFIER ELEMENTS                 -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <volume-id>                              -->
+<!ENTITY % volume-id-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    VOLUME IDENTIFIER                          -->
+<!--                    Used to record an identifier such as a DOI
+                        that describes an entire volume of a
+                        journal.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=volume-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=volume-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=volume-id
+                                                                   -->
+<!ELEMENT  volume-id    (#PCDATA %volume-id-elements;)*              >
+<!ATTLIST  volume-id
+             %volume-id-atts;                                        >
+
+
+<!--                    VOLUME SERIES ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <volume>                                 -->
+<!ENTITY % volume-series-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    VOLUME SERIES                              -->
+<!--                    This is a rare metadata element, intended to
+                        hold the series number, in those odd cases
+                        where, for example, a Publisher has reissued
+                        a journal, restarting the volume numbers
+                        with "1", so duplicate volume numbers
+                        would exist and need to be differentiated.
+                        Such a publisher typically adds a series
+                        number to their volume numbers, and
+                        this element has been created to hold such
+                        a series number.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=volume-series
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=volume-series
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=volume-series
+                                                                   -->
+<!ELEMENT  volume-series
+                        (#PCDATA %volume-series-elements;)*          >
+<!ATTLIST  volume-series
+            %volume-series-atts;                                     >
+
+
+<!--                    VOLUME ISSUE GROUP                         -->
+<!--                    Content model for the element
+                        <volume-issue-group>.                      -->
+<!ENTITY % volume-issue-group-model
+                        "(volume*, volume-id*, volume-series?,
+                         issue*, issue-id*, 
+                         issue-title*, issue-title-group*, 
+                         issue-sponsor*, issue-part?)"               >
+
+
+<!--                    TRANSLATED TITLE GROUP                     -->
+<!--                    Container element to hold together related
+                        volume and issue elements.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=volume-issue-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=volume-issue-group
+                                                                   -->
+<!ELEMENT  volume-issue-group
+                        %volume-issue-group-model;                   >
+<!ATTLIST  volume-issue-group
+             %volume-issue-group-atts;                               >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON ARTICLE METADATA/BIBLIOGRAPHIC      -->
+<!--                    CONTRIBUTOR IDENTIFICATION ELEMENTS        -->
+<!-- ============================================================= -->
+
+
+<!--                    ANONYMOUS ELEMENTS                         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <anonymous> element                     -->
+<!ENTITY % anonymous-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ANONYMOUS CONTENT MODEL                    -->
+<!--                    The content model for the <anonymous> 
+                        element                                    -->
+<!ENTITY % anonymous-model
+                        "(#PCDATA %anonymous-elements;)*"            >
+
+
+<!--                    ANONYMOUS                                  -->
+<!--                    Place holder for the name of a contributor
+                        whose name is unknown or not disclosed.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=anonymous
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=anonymous
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=anonymous
+                                                                   -->
+<!ELEMENT  anonymous    %anonymous-model;                            >
+<!ATTLIST  anonymous
+             %anonymous-atts;                                        >
+
+
+<!--                    ET AL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <etal> element                          -->
+<!ENTITY % etal-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ET AL CONTENT MODEL                        -->
+<!--                    The content model for the <etal> element   -->
+<!ENTITY % etal-model   "(#PCDATA %etal-elements;)*"                 >
+
+
+<!--                    ET AL                                      -->
+<!--                    Most journals model this as an EMPTY element,
+                        typically used to generate the text "et al."
+                        from a stylesheet. However, a few journal
+                        DTDs (Blackwell's, for example) expect
+                        content for this element, with such text as
+                        "Associates, coworkers, and colleagues".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=etal
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=etal
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=etal
+                                                                   -->
+<!ELEMENT  etal         %etal-model;                                 >
+<!ATTLIST  etal
+             %etal-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON ARTICLE METADATA/BIBLIOGRAPHIC      -->
+<!--                    PUBLISHER IDENTIFICATION ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    ON BEHALF OF CONTENT ELEMENTS              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <on-behalf-of>
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix beguines with
+                        an OR bar.                                 -->
+<!ENTITY % on-behalf-of-elements
+                        "%rendition-plus; | %institution-wrap.class;"
+                                                                     >
+
+<!--                    ON BEHALF OF                               -->
+<!--                    When a contributor has written or edited
+                        a work  "on-behalf-of" an organization or
+                        group the contributor is acting as a
+                        representative of the organization, which
+                        may or may not be his/her usual affiliation.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=on-behalf-of
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=on-behalf-of
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=on-behalf-of
+                                                                   -->
+<!ELEMENT  on-behalf-of (#PCDATA %on-behalf-of-elements;)*           >
+<!ATTLIST  on-behalf-of
+             %on-behalf-of-atts;                                     >
+
+
+<!--                    PUBLISHER CONTENT MODEL                    -->
+<!--                    The content model for the <publisher>
+                        element                                    -->
+<!ENTITY % publisher-model
+                        "((publisher-name, publisher-loc?)+)"        >
+
+
+<!--                    PUBLISHER                                  -->
+<!--                    Who published the work
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=publisher
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=publisher
+                                                                   -->
+<!ELEMENT  publisher    %publisher-model;                            >
+<!ATTLIST  publisher
+             %publisher-atts;                                        >
+
+
+<!--                    PUBLISHER'S NAME ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <publisher-name>
+                        Design Note: All inline mixes begin with an
+                        OR bar; since %just-rendition; is an
+                        inline mix, the OR bar is already there    -->
+<!ENTITY % publisher-name-elements
+                        "%just-rendition;| %institution-wrap.class;" >
+
+
+<!--                    PUBLISHER'S NAME                           -->
+<!--                    Name of the publisher of the work
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=publisher-name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=publisher-name
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=publisher-name
+                                                                   -->
+<!ELEMENT  publisher-name
+                        (#PCDATA %publisher-name-elements;)*         >
+<!ATTLIST  publisher-name
+             %publisher-name-atts;                                   >
+
+
+<!--                    PUBLISHER'S LOCATION ELEMENTS              -->
+<!--                    Elements for use in the Publisher Location
+                        <publisher-loc> element                    -->
+<!ENTITY % publisher-loc-elements
+                        "| %address.class; | %address-link.class; |
+                         %emphasis.class; | %subsup.class;"          >
+
+
+<!--                    PUBLISHER'S LOCATION                       -->
+<!--                    Place of publication, usually a city such
+                        as New York or London
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=publisher-loc
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=publisher-loc
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=publisher-loc
+                                                                   -->
+<!ELEMENT  publisher-loc
+                        (#PCDATA %publisher-loc-elements;)*          >
+<!ATTLIST  publisher-loc
+             %publisher-loc-atts;                                    >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON METADATA ELEMENTS CONTINUED         -->
+<!--                    PAGE NUMBERING (SIZE) ELEMENTS             -->
+<!-- ============================================================= -->
+
+
+<!--                    FIRST PAGE                                 -->
+<!--                    The page number on which the article starts,
+                        for print journals that have page numbers
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fpage
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fpage
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=fpage
+                                                                   -->
+<!ELEMENT  fpage        (#PCDATA)                                    >
+<!ATTLIST  fpage
+             %fpage-atts;                                            >
+
+
+<!--                    LAST PAGE                                  -->
+<!--                    The page number on which the article ends,
+                        for print journals that have page numbers
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=lpage
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=lpage
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=lpage
+                                                                   -->
+<!ELEMENT  lpage        (#PCDATA)                                    >
+<!ATTLIST  lpage
+             %lpage-atts;                                            >
+
+
+<!--                    PAGE RANGES                                -->
+<!--                    A container element for additional page
+                        information (TO BE USED TO SUPPLEMENT AND
+                        NOT TO REPLACE <fpage> and <lpage>) to record
+                        discontinuous pages ranges such as
+                            "8-11, 14-19, 40"
+                        meaning that the article begins on page
+                        8, runs 8 through 11, skips to pages 14
+                        through 19, and concludes on page 40.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=page-range
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=page-range
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=page-range
+                                                                   -->
+<!ELEMENT  page-range   (#PCDATA)                                    >
+<!ATTLIST  page-range
+             %page-range-atts;                                       >
+
+
+<!--                    SIZE ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the size element.                          -->
+<!ENTITY % size-elements
+                        ""                                           >
+
+
+<!--                    SIZE                                       -->
+<!--                    The size (such as running time, page count,
+                        or physical measurements) of the object being
+                        described, usually by a <product> element.
+                        The "units" attribute must be used to name
+                        the unit of measure (pages, minutes, hours,
+                        linear feet, etc.).
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=size
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=size
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=size
+                                                                   -->
+<!ELEMENT  size         (#PCDATA %size-elements;)*                   >
+<!ATTLIST  size
+             %size-atts;                                             >
+
+
+<!--                    ELECTRONIC LOCATION IDENTIFIER             -->
+<!--                    Used to identify an article that
+                        does not have traditional page numbers.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=elocation-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=elocation-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=elocation-id
+                                                                   -->
+<!ELEMENT  elocation-id (#PCDATA)                                    >
+<!ATTLIST  elocation-id
+             %elocation-id-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                    CITATIONS (BIBLIOGRAPHIC REFERENCE)        -->
+<!-- ============================================================= -->
+
+
+<!--                    CITATION ALTERNATIVES MODEL                -->
+<!--                    Model for the <citation-alternatives>
+                        element.                                   -->
+<!ENTITY % citation-alternatives-model
+                        "( (%id.class;)*,
+                           (%citation-minus-alt.class;)+ )"          >
+
+
+<!--                    CITATION ALTERNATIVES                      -->
+<!--                    This element will hold alternative versions of 
+                        one citation, for example, a single citation 
+                        in multiple languages or a single citation 
+                        tagged as both a <mixed-citation> complete 
+                        with punctuation and spacing and as an
+                        <element-citation> with punctuation and 
+                        spacing removed.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=citation-alternativesv
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=citation-alternatives
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=citation-alternatives
+                                                                   -->
+<!ELEMENT  citation-alternatives
+                        %citation-alternatives-model;                >
+<!ATTLIST  citation-alternatives
+             %citation-alternatives-atts;                            >
+
+
+<!--                    CITATION ELEMENTS                          -->
+<!--                    Content for both types of citation. These
+                        elements may be mixed with #PCDATA in the
+                        <mixed-citation> element (in which all
+                        punctuation and spacing are left intact), and
+                        they also constitute the choices that can be
+                        used to form the all-element-content of the
+                        <element-citation> element (in which
+                        punctuation and spacing are removed).
+                        Design Note: All inline mixes begin with an
+                        OR bar.                                    -->
+<!ENTITY % citation-elements
+                        "%emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %label.class; |
+                         %phrase.class; | %references.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    MIXED CITATION                             -->
+<!--                    A citation is a description of a work, such
+                        as a journal article, book, or personal
+                        communication, that is cited in the text of
+                        the article. This citation element is
+                        completely loose, with text, punctuation,
+                        spacing, and any of the citation elements
+                        in any order.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=mixed-citation
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=mixed-citation
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=mixed-citation
+                                                                   -->
+<!ELEMENT  mixed-citation
+                        (#PCDATA | %citation-elements;)*             >
+<!ATTLIST  mixed-citation
+             %mixed-citation-atts;                                   >
+
+
+<!--                    ELEMENT CITATION                           -->
+<!--                    A citation is a description of a work, such
+                        as a journal article, book, or personal
+                        communication, that is cited in the text of
+                        the article. This citation model contains
+                        element-only content, with elements in
+                        any order as many times as needed. This
+                        citation is intended for use in capturing
+                        a publisher's specific element order.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=element-citation
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=element-citation
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=element-citation
+                                                                   -->
+<!ELEMENT  element-citation
+                        (%citation-elements;)+                       >
+<!ATTLIST  element-citation
+             %element-citation-atts;                                 >
+
+
+<!-- ============================================================= -->
+<!--                    ADDRESS ELEMENTS                           -->
+<!-- ============================================================= -->
+
+
+<!--                    ADDRESS MODEL                              -->
+<!--                    Content model for the <address> element    -->
+<!ENTITY % address-model
+                        "(%address.class; | %address-link.class;)*"  >
+
+
+<!--                    ADDRESS/CONTACT INFORMATION                -->
+<!--                    Wrapper element for contact information such
+                        as address, phone, fax, email, url, country,
+                        etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=address
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=address
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=address
+                                                                   -->
+<!ELEMENT  address      %address-model;                              >
+<!ATTLIST  address
+             %address-atts;                                          >
+
+
+<!--                    ADDRESS LINE ELEMENTS                      -->
+<!--                    Elements for use in the <addr-line> element-->
+<!ENTITY % addr-line-elements
+                        "%simple-text; | %address-line.class;"       >
+
+
+<!--                    ADDRESS LINE                               -->
+<!--                    One line in an address                     -->
+<!--                    Conversion Note: If the address is
+                        undifferentiated data characters, the entire
+                        address may be inside one of these elements.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=addr-line
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=addr-line
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=addr-line
+                                                                   -->
+<!ELEMENT  addr-line    (#PCDATA %addr-line-elements;)*              >
+<!ATTLIST  addr-line
+             %addr-line-atts;                                        >
+
+
+<!--                    CITY ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the city element.                          -->
+<!ENTITY % city-elements
+                        ""                                           >
+
+
+<!--                    CITY: IN AN ADDRESS                        -->
+<!--                    The name of a city.                   
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=city
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=city
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=city
+                                                                   -->
+<!ELEMENT  city         (#PCDATA %city-elements;)*                   >
+<!ATTLIST  city
+             %city-atts;                                             >
+
+
+<!--                    COUNTRY ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the country element.                       -->
+<!ENTITY % country-elements
+                        ""                                           >
+
+
+<!--                    COUNTRY: IN AN ADDRESS                     -->
+<!--                    The name of a country.                    
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=country
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=country
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=country
+                                                                   -->
+<!ELEMENT  country      (#PCDATA %country-elements;)*                >
+<!ATTLIST  country
+             %country-atts;                                          >
+
+
+<!--                    EMAIL ADDRESS ELEMENTS                     -->
+<!--                    Elements to be mixed with #PCDATA inside the
+                        <email> element                            -->
+<!ENTITY % email-elements
+                        ""                                           >
+
+
+<!--                    EMAIL ADDRESS                              -->
+<!--                    The email address of a person or institution.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=email
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=email
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=email
+                                                                   -->
+<!ELEMENT  email        (#PCDATA %email-elements;)*                  >
+<!ATTLIST  email
+             %email-atts;                                            >
+
+
+<!--                    FAX NUMBER ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <fax>                                    -->
+<!ENTITY % fax-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    FAX NUMBER: IN AN ADDRESS                  -->
+<!--                    The number used to send faxes.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fax
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fax
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=fax
+                                                                   -->
+<!ELEMENT  fax          (#PCDATA %fax-elements;)*                    >
+<!ATTLIST  fax
+             %fax-atts;                                              >
+
+
+<!--                    INSTITUTION NAME ELEMENTS                  -->
+<!--                    Elements for use in the <institution>
+                        element                                    -->
+<!ENTITY % institution-elements
+                        "| %break.class; | %emphasis.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    INSTITUTION NAME: IN AN ADDRESS            -->
+<!--                    Name of a institution or organization such as
+                        a university or corporation used in an
+                        address or within a citation (such as a
+                        <mixed-citation> or an <element-citation>)
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=institution
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=institution
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=institution
+                                                                   -->
+<!ELEMENT  institution  (#PCDATA %institution-elements;)*            >
+<!ATTLIST  institution
+             %institution-atts;                                      >
+
+
+<!--                    INSTITUTION IDENTIFIER MODEL               -->
+<!--                    Content model for the <institution-id>
+                        element                                    -->
+<!ENTITY % institution-id-model
+                        "(#PCDATA)"                                  >
+
+
+<!--                    INSTITUTION IDENTIFIER                     -->
+<!--                    Contains an institutional identifier,
+                        whether publisher-specific (for example,  
+                        "AIP") or from an established identifying
+                        authority (for example,"Ringgold" or "ISNI").
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=institution-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=institution-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=institution-id
+                                                                   -->
+<!ELEMENT  institution-id  
+                        %institution-id-model;                       >
+<!ATTLIST  institution-id
+             %institution-id-atts;                                   >
+
+
+<!--                    INSTITUTION WRAPPER MODEL                  -->
+<!--                    Content model for the <institution-wrap>
+                        element                                    -->
+<!ENTITY % institution-wrap-model
+                        "(%institution.class;)*"                     >
+
+
+<!--                    INSTITUTION WRAPPER                        -->
+<!--                    A container element to hold the name of an
+                        institution <institution> and any formal
+                        identifiers for that institution 
+                        <institution-id>), for example, a INSI or
+                        Ringgold ID.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=institution-wrap
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=institution-wrap
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=institution-wrap
+                                                                   -->
+<!ELEMENT  institution-wrap  
+                        %institution-wrap-model;                     >
+<!ATTLIST  institution-wrap
+             %institution-wrap-atts;                                 >
+
+
+<!--                    PHONE NUMBER ELEMENTS                      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <phone number>
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %just-rendition; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % phone-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    PHONE NUMBER: IN AN ADDRESS                -->
+<!--                    A callable phone number in some telephone or
+                        wireless system somewhere in the world.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=phone
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=phone
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=phone
+                                                                   -->
+<!ELEMENT  phone        (#PCDATA %phone-elements;)*                  >
+<!ATTLIST  phone
+             %phone-atts;                                            >
+
+
+<!--                    POSTAL CODE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the postal-code element.                   -->
+<!ENTITY % postal-code-elements
+                        ""                                           >
+
+
+<!--                    POSTAL CODE: IN AN ADDRESS                 -->
+<!--                    A postal number such as a zip-code or postal
+                        code used to address physical mail.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=postal-code
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=postal-code
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=postal-code
+                                                                   -->
+<!ELEMENT  postal-code  (#PCDATA %postal-code-elements;)*            >
+<!ATTLIST  postal-code
+             %postal-code-atts;                                      >
+
+
+<!--                    STATE ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the state element.                         -->
+<!ENTITY % state-elements
+                        ""                                           >
+
+
+<!--                    STATE or PROVINCE: IN AN ADDRESS           -->
+<!--                    The name of a state, province, territory or
+                        other political unit used in an address. This
+                        is a lower level subdivision than a country,
+                        but higher than a city, county, or parish. 
+                        The names for such a unit vary geopolitically.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=state
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=state
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=state
+                                                                   -->
+<!ELEMENT  state        (#PCDATA %state-elements;)*                  >
+<!ATTLIST  state
+             %state-atts;                                            >
+
+
+<!--                    URI ELEMENTS                               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <uri>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % uri-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    URI                                        -->
+<!--                    URI such as a URL that may be used as a
+                        live link, typically naming a web site, such
+                        as:
+                           <url>http://www.mulberrytech.com</url>
+                        Alternatively the element content may name
+                        the URL, e.g., "Mulberry's Website" and the
+                        "xlink:href" attribute may hold the real
+                        URL.
+                           <url xlink:href="http://www.mulberrytech.
+                           com">Mulberry's Website</url>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=uri
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=uri
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=uri
+                                                                   -->
+<!ELEMENT  uri          (#PCDATA %uri-elements;)*                    >
+<!ATTLIST  uri
+             %uri-atts;                                              >
+
+
+<!-- ============================================================= -->
+<!--                    SUPPLEMENT ELEMENTS                        -->
+<!-- ============================================================= -->
+
+
+<!--                    SUPPLEMENT ELEMENTS                        -->
+<!--                    Elements for use in the <supplement> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % supplement-elements
+                        "%simple-text; | %contrib-group.class; |
+                         %title.class;"                              >
+
+
+<!--                    SUPPLEMENT                                 -->
+<!--                    For a journal published as a supplement, this
+                        is a container element for all the provided
+                        supplement information, such as additional
+                        identification numbers, titles, authors, and
+                        supplement series information.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=supplement
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=supplement
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=supplement
+                                                                   -->
+<!ELEMENT  supplement   (#PCDATA %supplement-elements;)*             >
+<!ATTLIST  supplement
+            %supplement-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    DATE ELEMENTS (PUBLICATION HISTORY)        -->
+<!-- ============================================================= -->
+
+
+<!--                    DATE                                       -->
+<!--                    The elements <day>, <month>, and <year> should
+                        ALWAYS be numeric values. The date may be
+                        represented as a string in <string-date>, but
+                        the numeric values should be present whenever
+                        possible.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=date
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=date
+                                                                   -->
+<!ELEMENT  date         %date-model;                                 >
+<!ATTLIST  date
+              %date-atts;                                            >
+
+
+<!--                    DAY                                        -->
+<!--                    The numeric value of a day of the month, used
+                        in both article metadata and inside a citation,
+                        in two digits as it would be stated in the "DD"
+                        in an international date format YYYY-MM-DD, for
+                        example "03", "25".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=day
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=day
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=day
+                                                                   -->
+<!ELEMENT  day          (#PCDATA)                                    >
+<!ATTLIST  day
+             %day-atts;                                              >
+
+
+<!--                    MONTH                                      -->
+<!--                    Names one of the months of the year. Used in
+                        both article metadata and inside a citation,
+                        this element may contain a full month
+                        "December", an abbreviation "Dec", or,
+                        preferably, a numeric month such as "12".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=month
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=month
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=month
+                                                                   -->
+<!ELEMENT  month        (#PCDATA)                                    >
+<!ATTLIST  month
+             %month-atts;                                            >
+
+
+<!--                    SEASON                                     -->
+<!--                    Season of publication, such as "Spring".
+                        Used in both article metadata and inside a
+                        citation (such as a <mixed-citation> or an
+                        <element-citation>)
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=season
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=season
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=season
+                                                                   -->
+<!ELEMENT  season       (#PCDATA)                                    >
+<!ATTLIST  season
+             %season-atts;                                           >
+
+
+<!--                    ERA                                        -->
+<!--                    Era of publication. Used in certain Japanese
+                        and Korean dates.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=era
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=era
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=era
+                                                                   -->
+<!ELEMENT  era         (#PCDATA)                                     >
+<!ATTLIST  era
+             %era-atts;                                              >
+
+
+<!--                    YEAR                                       -->
+<!--                    Year of publication, which should be expressed
+                        as a 4-digit number: "1776" or "1924"
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=year
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=year
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=year
+                                                                   -->
+<!ELEMENT  year         (#PCDATA)                                    >
+<!ATTLIST  year
+             %year-atts;                                             >
+
+
+<!--                    STRING DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-date> element                  -->
+<!ENTITY % string-date-elements
+                        " | %date-parts.class;"                      >
+
+
+<!--                    DATE AS A STRING                           -->
+<!--                    This is a representation of the date as a
+                        string; usually used for dates for which
+                        months and years are not given, but may be
+                        used for any date as a string (i.e., "January,
+                        2001" "Fall 2001" "March 11, 2001").
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=string-date
+                                                                   -->
+<!ELEMENT  string-date  (#PCDATA %string-date-elements;)*            >
+<!ATTLIST  string-date
+             %string-date-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    GROUP OR CORPORATE AUTHOR ELEMENTS         -->
+<!-- ============================================================= -->
+
+
+<!--                    COLLABORATION ALTERNATIVES ELEMENTS        -->
+<!--                    Content model for the <collab-alternatives>
+                        element.                                   -->
+<!ENTITY % collab-alternatives-model
+                        "(%collab.class;)+"                          >
+
+
+<!--                    COLLABORATION ALTERNATIVES                 -->
+<!--                    Wrapper element for more than one version of
+                        a collaboration, for example, the name of a
+                        laboratory in more than one language such as
+                        the lab name in Japanese kana characters and 
+                        a transliterated form of the lab name in Latin 
+                        alphabet.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=collab-alternatives
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=collab-alternatives
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=collab-alternatives
+                                                                   -->
+<!ELEMENT  collab-alternatives
+                        %collab-alternatives-model;                  >
+<!ATTLIST  collab-alternatives
+             %collab-alternatives-atts;                              >
+
+
+<!--                    COLLABORATIVE (GROUP) AUTHOR ELEMENTS      -->
+<!--                    Elements for use in the <collab> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % collab-elements
+                        "%simple-text; | %address.class; |
+                         %contrib-group.class; |
+                         %contrib-info.class; | %fn-link.class;"     >
+
+
+<!--                    COLLABORATIVE (GROUP) AUTHOR               -->
+<!--                    Used for groups of authors credited under
+                        one name, either as a collaboration in the
+                        strictest sense, or when an organization,
+                        institution, or corporation is the group.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=collab
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=collab
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=collab
+                                                                   -->
+<!ELEMENT  collab       (#PCDATA %collab-elements;)*                 >
+<!ATTLIST  collab
+             %collab-atts;                                           >
+
+
+<!-- ============================================================= -->
+<!--                    PERSON'S NAME ELEMENTS (BIBLIOGRAPHIC)     -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR IDENTIFIER MODEL               -->
+<!--                    Content model for the <contrib-id> element -->
+<!ENTITY % contrib-id-model
+                        "(#PCDATA)"                                  >
+
+
+<!--                    CONTRIBUTOR IDENTIFIER                     -->
+<!--                    One identifier for a person such as a
+                        contributor or principal investigator. This
+                        element will hold an ORCID, a trusted
+                        publisher's identifier, or a JST or NII 
+                        identifier.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=contrib-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=contrib-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=contrib-id
+                                                                   -->
+<!ELEMENT  contrib-id   %contrib-id-model;                           >
+<!ATTLIST  contrib-id 
+             %contrib-id-atts;                                       >
+
+
+<!--                    NAME ALTERNATIVES MODEL                    -->
+<!--                    Content model for the <name-alternatives>
+                        element                                    -->
+<!ENTITY % name-alternatives-model
+                        "((%name-alternatives.class;)+)"             >
+
+
+<!--                    NAME ALTERNATIVES                          -->
+<!--                    Wrapper element for more than one version of
+                        a personal name, for example, the name in
+                        Japanese kana characters and a transliterated
+                        form of the name in Latin alphabet.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=name-alternatives
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=name-alternatives
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=name-alternatives
+                                                                   -->
+<!ELEMENT  name-alternatives
+                        %name-alternatives-model;                    >
+<!ATTLIST  name-alternatives
+             %name-alternatives-atts;                                >
+
+
+
+<!--                    NAME OF PERSON (STRUCTURED)                -->
+<!--                    Wrapper element for personal names.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=name
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=name
+                                                                   -->
+<!ELEMENT  name         ( ( (surname, given-names?) | given-names),
+                          prefix?, suffix?)                          >
+<!ATTLIST  name
+             %name-atts;                                             >
+
+
+<!--                    STRING NAME ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-name> element                  -->
+<!ENTITY % string-name-elements
+                        " | %person-name.class;"                     >
+
+
+<!--                    NAME OF PERSON (UNSTRUCTURED)              -->
+<!--                    Wrapper element for personal names where the
+                        stricter format of the <name> element cannot
+                        be followed. This is a very loose element,
+                        allowing data characters, generated text,
+                        and any or all of the naming elements.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=string-name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=string-name
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=string-name
+                                                                   -->
+<!ELEMENT  string-name  (#PCDATA %string-name-elements;)*            >
+<!ATTLIST  string-name
+             %string-name-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    PARTS OF A PERSON'S NAME ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    DEGREE(S) ELEMENTS                         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <degrees>
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % degrees-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    DEGREE(S)                                  -->
+<!--                    Academic degrees or professional
+                        certifications
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=degrees
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=degrees
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=degrees
+                                                                   -->
+<!ELEMENT  degrees      (#PCDATA %degrees-elements;)*                >
+<!ATTLIST  degrees
+             %degrees-atts;                                          >
+
+
+<!--                    GIVEN (FIRST) NAMES ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <given-names>                            -->
+<!ENTITY % given-names-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    GIVEN (FIRST) NAMES                        -->
+<!--                    Includes all given names for a person, such
+                        as the first name, middle names, maiden
+                        name if used as part of the married name,
+                        etc.)
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=given-names
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=given-names
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=given-names
+                                                                   -->
+<!ELEMENT  given-names  (#PCDATA %given-names-elements;)*            >
+<!ATTLIST  given-names
+             %given-names-atts;                                      >
+
+
+<!--                    SURNAME ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <surname>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % surname-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    SURNAME                                    -->
+<!--                    The surname (family name) of an individual.
+                        or the single name if there is only one
+                        name, for example, "Cher" or "Pele".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=surname
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=surname
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=surname
+                                                                   -->
+<!ELEMENT  surname      (#PCDATA %surname-elements;)*                >
+<!ATTLIST  surname
+             %surname-atts;                                          >
+
+
+<!--                    PREFIX ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <prefix>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % prefix-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    PREFIX                                     -->
+<!--                    Honorifics or other qualifiers that usually
+                        precede the surname, for example,  Professor,
+                        Rev., President, Senator, Dr., Sir, The
+                        Honorable, et al.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=prefix
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=prefix
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=prefix
+                                                                   -->
+<!ELEMENT  prefix       (#PCDATA %prefix-elements;)*                 >
+<!ATTLIST  prefix
+             %prefix-atts;                                           >
+
+
+
+<!--                    SUFFIX ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <suffix>
+                        Design Note: This PE begins with an OR bar,
+                        it is inside %just-rendition;              -->
+<!ENTITY % suffix-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    SUFFIX                                     -->
+<!--                    Text used as a suffix to a person's name, for
+                        example: Sr., Jr., III, 3rd
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=suffix
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=suffix
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=suffix
+                                                                   -->
+<!ELEMENT  suffix       (#PCDATA %suffix-elements;)*                 >
+<!ATTLIST  suffix
+             %suffix-atts;                                           >
+
+
+<!-- ============================================================= -->
+<!--                    EXTERNAL LINK ELEMENTS                     -->
+<!-- ============================================================= -->
+
+
+<!--                    EXTERNAL LINK ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <ext-link>
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %link-elements; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % ext-link-elements
+                        "%link-elements;"                            >
+
+
+<!--                    EXTERNAL LINK                              -->
+<!--                    Link to an external file, such as Medline,
+                        Genbank, etc.  Linking may be accomplished
+                        using the XLink linking attributes.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ext-link
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ext-link
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ext-link
+                                                                   -->
+<!ELEMENT  ext-link     (#PCDATA %ext-link-elements;)*               >
+<!ATTLIST  ext-link
+             %ext-link-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    SHARED STRUCTURAL ELEMENTS                 -->
+<!-- ============================================================= -->
+
+
+<!--                    ATTRIBUTION ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an attribution
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % attrib-elements
+                        "%emphasized-text;"                          >
+
+
+<!--                    ATTRIBUTION                                -->
+<!--                    Source, author, formal thanks, or other
+                        information (other than copyright material)
+                        concerning the origins of an extract, a poem
+                        <verse-group> or similar element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=attrib
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=attrib
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=attrib
+                                                                   -->
+<!ELEMENT  attrib       (#PCDATA %attrib-elements;)*                 >
+<!ATTLIST  attrib
+             %attrib-atts;                                           >
+
+
+<!--                    DEFINITION LIST: DEFINITION MODEL          -->
+<!--                    Content model for the <def> element, which
+                        is used in contexts outside of <def-list>s -->
+<!ENTITY % def-model    "((%just-para.class;)+ )"                    >
+
+
+<!--                    DEFINITION LIST: DEFINITION                -->
+<!--                    Used in two senses:
+                        1) The definition, description, or other
+                        explanation of the word, phrase, or picture
+                        of a 2-part or definition list
+                        2) The definition or expansion of an
+                        abbreviation or acronym <abbrev>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=def
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=def
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=def
+                                                                   -->
+<!ELEMENT  def          %def-model;                                  >
+<!ATTLIST  def
+             %def-atts;                                              >
+
+
+<!--                    LABEL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <label> element                        -->
+<!ENTITY % label-elements
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %subsup.class;"       >
+
+
+<!--                    LABEL OF A FIGURE, REFERENCE, ETC.         -->
+<!--                    The number and any prefix word that comes
+                        before, for example, the caption of a Figure,
+                        such as "Figure 3." or "Exhibit 2.".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=label
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=label
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=label
+                                                                   -->
+<!ELEMENT  label        (#PCDATA %label-elements;)*                  >
+<!ATTLIST  label
+             %label-atts;                                            >
+
+
+<!--                    PRICE ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <price> element                        -->
+<!ENTITY % price-elements
+                        "| %emphasis.class;"                         >
+
+
+<!--                    PRICE                                      -->
+<!--                    Sale price of a work, typically a book or
+                        software package that is being reviewed
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=price
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=price
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=price
+                                                                   -->
+<!ELEMENT  price        (#PCDATA %price-elements;)*                  >
+<!ATTLIST  price
+             %price-atts;                                            >
+
+
+<!--                    STRUCTURAL TITLE ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <title> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % struct-title-elements
+                        "%simple-phrase; | %break.class; |
+                         %citation.class;"                           >
+
+
+<!--                    TITLE                                      -->
+<!--                    Heading or title for a structural element
+                        such as a Section, Figure, Boxed Text, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=title
+                                                                   -->
+<!ELEMENT  title        (#PCDATA %struct-title-elements;)*           >
+<!ATTLIST  title
+             %title-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    RELATED ARTICLE ELEMENTS                   -->
+<!--                    (METADATA AND STRUCTURAL)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    RELATED ARTICLE ELEMENTS                   -->
+<!--                    Elements allowed inside <related-article>  -->
+<!ENTITY % related-article-elements
+                        "| %emphasis.class; | %journal-id.class; |
+                         %phrase-content.class; |
+                         %references.class; |  %subsup.class;"       >
+
+
+<!--                    RELATED ARTICLE INFORMATION                -->
+<!--                    Wrapper element, used as a container for
+                        text links to a related article, possibly
+                        accompanied by a very brief description
+                        such as "errata (correction)".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=related-article
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=related-article
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=related-article
+                                                                   -->
+<!ELEMENT  related-article
+                        (#PCDATA %related-article-elements;)*        >
+<!ATTLIST  related-article
+             %related-article-atts;                                  >
+
+
+<!-- ============================================================= -->
+<!--                    SIGNATURE BLOCK ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    SIGNATURE BLOCK ELEMENTS                   -->
+<!--                    Elements to be mixed with data characters
+                        inside the content model for the
+                        <sig-block> element.                       -->
+<!ENTITY % sig-block-elements
+                         "| %break.class; | %emphasis.class; |
+                          %just-base-display.class; |
+                          %inline-display-noalt.class; |
+                          %phrase-content.class; |
+                          %sig.class; | %subsup.class;"              >
+
+
+<!--                    SIGNATURE BLOCK                            -->
+<!--                    An area of text and graphic material placed
+                        at the end of an article or section to hold
+                        the graphical signature or other description
+                        of the person responsible for or attesting
+                        to the content.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sig-block
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sig-block
+                                                                   -->
+<!ELEMENT  sig-block    (#PCDATA %sig-block-elements;)*              >
+<!ATTLIST  sig-block
+             %sig-block-atts;                                        >
+
+
+<!--                    SIGNATURE ELEMENTS                         -->
+<!--                    Elements to be mixed with data characters
+                        inside the content model for the
+                        <sig> element.                             -->
+<!ENTITY % sig-elements "%rendition-plus; | %break.class; |
+                         %inline-display-noalt.class; |
+                         %just-base-display-noalt.class;"            >
+
+
+<!--                    SIGNATURE                                  -->
+<!--                    One contributor signature and associated
+                        material (such as a text restatement of the
+                        affiliation) inside a signature block.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sig
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sig
+                                                                   -->
+<!ELEMENT  sig          (#PCDATA %sig-elements;)*                    >
+<!ATTLIST  sig
+             %sig-atts;                                              >
+
+
+<!-- ============================================================= -->
+<!--                    FRONT MATTER/BACK MATTER ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    ACKNOWLEDGMENTS MODEL                      -->
+<!--                    Content model for the <ack> element        -->
+<!ENTITY % ack-model    "%sec-opt-title-model;"                      >
+
+
+<!--                    ACKNOWLEDGMENTS                            -->
+<!--                    Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ack
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ack
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ack
+                                                                   -->
+
+<!ELEMENT  ack          %ack-model;                                  >
+<!ATTLIST  ack
+             %ack-atts;                                              >
+
+
+<!--                    BIOGRAPHY MODEL                            -->
+<!--                    Content model for the <bio> element        -->
+<!ENTITY % bio-model    "%sec-opt-title-model;"                      >
+
+
+<!--                    BIOGRAPHY                                  -->
+<!--                    Short biography of a person, usually the
+                        author
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=bio
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=bio
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=bio
+                                                                   -->
+<!ELEMENT  bio          %bio-model;                                  >
+<!ATTLIST  bio
+             %bio-atts;                                              >
+
+
+<!--                    NOTES MODEL                                -->
+<!--                    Content model for the <notes> element      -->
+<!ENTITY % notes-model  "%sec-opt-title-model;"                      >
+
+
+<!--                    NOTES                                      -->
+<!--                    A container element for the notes that may
+                        appear at the end of an Article or at the
+                        end of a Table, for example, a typical
+                        end-of-article note is a "Note in Proof".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=notes
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=notes
+                                                                   -->
+<!ELEMENT  notes        %notes-model;                                >
+<!ATTLIST  notes
+             %notes-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    ACCESSIBILITY ELEMENTS                     -->
+<!-- ============================================================= -->
+
+
+<!--                    ALTERNATE TITLE TEXT FOR A FIGURE, ETC.    -->
+<!--                    Short phrase used to display or pronounce
+                        as an alternative to providing the full
+                        graphic for accessibility display or
+                        graphic-limited web sites or devices. For
+                        example, <alt-text> may be used to display
+                        "behind" a figure or graphic.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=alt-text
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=alt-text
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=alt-text
+                                                                   -->
+<!ELEMENT  alt-text     (#PCDATA)                                    >
+<!ATTLIST  alt-text
+             %alt-text-atts;                                         >
+
+
+<!--                    LONG DESCRIPTION ELEMENTS                  -->
+<!--                    Elements to be mixed with data characters
+                        inside the <long-desc> element             -->
+<!ENTITY % long-desc-elements
+                        ""                                           >
+
+
+<!--                    LONG DESCRIPTION                           -->
+<!--                    Description or summary of the content of a
+                        graphical object, table, or textual object
+                        such as a text box, used by some systems to
+                        make the object accessible, even to people
+                        or systems that cannot read/see/display the
+                        object.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=long-desc
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=long-desc
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=long-desc
+                                                                   -->
+<!ELEMENT  long-desc    (#PCDATA %long-desc-elements;)*              >
+<!ATTLIST  long-desc
+             %long-desc-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    CUSTOM METADATA ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    CUSTOM METADATA GROUP MODEL                -->
+<!--                    Content model for the <custom-meta-group>
+                        element                                    -->
+<!ENTITY % custom-meta-group-model
+                        "(custom-meta+)"                             >
+
+
+<!--                    CUSTOM METADATA GROUP                      -->
+<!--                    Some DTDs and schemas allow for metadata
+                        above and beyond that which can be specified
+                        by this DTD. This element is a grouping
+                        element used to contain all these additional
+                        metadata elements.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=custom-meta-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=custom-meta-group
+                                                                   -->
+<!ELEMENT  custom-meta-group
+                        %custom-meta-group-model;                    >
+<!ATTLIST  custom-meta-group
+             %custom-meta-group-atts;                                >
+
+
+<!--                    CUSTOM METADATA MODEL                      -->
+<!--                    Content model for the <custom-meta> element-->
+<!ENTITY % custom-meta-model
+                        "(meta-name, meta-value)"                    >
+
+
+<!--                    CUSTOM METADATA                            -->
+<!--                    Some DTDs and schemas allow for metadata
+                        above and beyond that which can be specified
+                        by this DTD. This element is used to capture
+                        metadata elements that have not been defined
+                        explicitly in the models for this DTD, so
+                        that the intellectual content will not be lost.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=custom-meta
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=custom-meta
+                                                                   -->
+<!ELEMENT  custom-meta  %custom-meta-model;                          >
+<!ATTLIST  custom-meta
+             %custom-meta-atts;                                      >
+
+
+<!--                    METADATA DATA NAME ELEMENTS                -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the <meta-name> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % meta-name-elements
+                        ""                                           >
+
+
+<!--                    METADATA DATA NAME FOR CUSTOM METADATA     -->
+<!--                    The <custom-meta> element
+                        allows for an infinite number of name/value
+                        pairs, with few constraints on the length or
+                        content of the value. This element contains
+                        the name of the metadata field.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=meta-name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=meta-name
+                                                                   -->
+<!ELEMENT  meta-name    (#PCDATA %meta-name-elements;)*              >
+<!ATTLIST  meta-name
+             %meta-name-atts;                                        >
+
+
+<!--                    METADATA DATA VALUE ELEMENTS               -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the <meta-value> element
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % meta-value-elements
+                        "%simple-phrase;"                            >
+
+
+<!--                    METADATA DATA VALUE FOR CUSTOM METADATA    -->
+<!--                    The <custom-meta> element
+                        allows for an infinite number of name/value
+                        pairs, with few constraints on the length or
+                        content of the value. This element contains
+                        the value of the metadata field that is named
+                        by the <meta-name> element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=meta-value
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=meta-value
+                                                                   -->
+<!ELEMENT  meta-value   (#PCDATA %meta-value-elements;)*             >
+<!ATTLIST  meta-value
+             %meta-value-atts;                                       >
+
+
+<!-- ============================================================= -->
+<!--                    PROCESSING ALTERNATIVES ELEMENTS           -->
+<!-- ============================================================= -->
+
+
+<!--                    ALTERNATIVES MODEL                         -->
+<!--                    Model for the <alternatives> processing
+                        alternatives element                       -->
+<!ENTITY % alternatives-model
+                        "((%id.class;)*, 
+                          (%alternatives-display.class; | 
+                          %math.class;)+ )"                          >
+
+
+<!--                    ALTERNATIVES FOR PROCESSING                -->
+<!--                    Container element used to hold a group of
+                        processing alternatives, for example, a
+                        single logical <graphic> that ships in
+                        different formats (tif, gif, jpeg) or
+                        different resolutions. This element is a
+                        physical grouping to contain multiple
+                        logically equivalent (substitutable) versions
+                        of the same information object.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=alternatives
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=alternatives
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=alternatives
+                                                                   -->
+<!ELEMENT  alternatives %alternatives-model;                         >
+<!ATTLIST  alternatives
+             %alternatives-atts;                                     >
+
+
+<!--                    TEXTUAL FORM ELEMENTS                      -->
+<!--                    Model for the <textual-form> element       -->
+<!ENTITY % textual-form-elements
+                        "| %emphasis.class; |
+                         %inline-display-noalt.class; |
+                         %math.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    TEXTUAL FORM                               -->
+<!--                    Container element (for use only inside
+                        <alternatives>) that will hold text and
+                        mixed content objects that act as alternatives
+                        to, for example, graphics.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=textual-form
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=textual-form
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=textual-form
+                                                                   -->
+<!ELEMENT  textual-form (#PCDATA %textual-form-elements;)*           >
+<!ATTLIST  textual-form
+             %textual-form-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                    GENERATED TEXT OR PUNCTUATION              -->
+<!-- ============================================================= -->
+
+
+<!--                    X TEXT ATTRIBUTES                          -->
+<!--                    Attributes for the element <x>             -->
+<!ENTITY % x-atts
+            "%jats-common-atts;                                        
+             content-type
+                        CDATA                             #IMPLIED
+             xml:space ( default | preserve)       #FIXED 'preserve'
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    X ELEMENTS                                 -->
+<!--                    Elements for use inside the <x> element    -->
+<!ENTITY % x-elements   ""                                           >
+
+
+<!--                    X - GENERATED TEXT AND PUNCTUATION         -->
+<!--                    A container element to hold punctuation or
+                        other generated text, typically when 1) an
+                        archive decides not to have any text
+                        generated and thus to pre-generate such
+                        things as commas or semicolons between
+                        keywords or 2) when an archive receives text
+                        with <x> tags embedded and wishes to retain
+                        them.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=x
+                                                                   -->
+<!ELEMENT  x            (#PCDATA %x-elements;)*                      >
+<!ATTLIST  x
+             %x-atts;                                                >
+
+
+<!-- ================== End NISO JATS Common (Shared) Elements === -->
+
diff --git a/dtd/JATS-default-classes1-3.ent b/dtd/JATS-default-classes1-3.ent
new file mode 100644
index 0000000..2833311
--- /dev/null
+++ b/dtd/JATS-default-classes1-3.ent
@@ -0,0 +1,1595 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Default Element Classes Module                    -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Default Element Classes Module v1.3 20210610//EN"
+Delivered as file "JATS-default-classes1-3.ent"                    -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             define the default element classes. Classes are   -->
+<!--             OR-groups of elements that are defined together   -->
+<!--             to be used in mixes and in Element Declarations.  -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before all   -->
+<!--             content modules that declare elements, and after  -->
+<!--             the class customization module (if any).          -->
+<!--                                                               -->
+<!-- CONTAINS:   PEs that define the element classes to be used    -->
+<!--             in the JATS DTD Suite modules.                    -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 46. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+      
+ 45. NEW DATE-ONLY CLASS - Added new date only class, since
+     date.class grew to include <string-date>, and there are 
+     times when ,string-date> is not wanted.
+ 
+ 44. STRING DATE - Added <string-date> to all citations
+     (mixed-, element-, product, related-article, related-object)
+     by adding it to %references.class;.
+ 
+ 43. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+      
+ 42. NEW BLOCK ALTERNATIVES CLASS - Added new display class: 
+     block-alternatives class to hold the elements that may be
+     used inside the new <block-alternatives> element.
+     
+ 41. QUESTIONS AND ANSWERS - Added the BITS question and answer
+     models to JATS. 
+     
+      - The following elements were added to the block display 
+        class Parameter Entity: 
+         - answer and answer-set
+         - explanation
+         - question, question-wrap, question-wrap-group
+         
+      - The block display class noalt received the same elements
+      
+      - A new PE, block display no explanation, was added
+        for use in <answer> and <option> elements.
+        
+       - New PE were added for modeling questions/answers:
+          - question-answer.class
+          - question-wrap.class
+          - option.class
+
+ 40. SUBJECT GROUP CLASS - Made the element <subj-group> into its own
+     class ( subj-group.class ) for use in models.
+
+ 39. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 38. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 37. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 36. INLINE-INDEX - Added the elements <index-term> and
+     <index-term-range-end> to phrase class to add the ability
+     to tag inline (embedded) index terms. 
+
+ 35. INLINE-MEDIA - <inline-media> added to all the classes that 
+     contained <inline-graphic>
+
+ 34. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 33. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 32. NEW CLASS FOR TITLES/SOURCES - Made the element <abbrev>
+     into its own class, so it can be added to title elements 
+     without adding milestones.
+
+ 31. INSIDE A TABLE: Added <disp-formula> as a sibling to
+     <graphic>, <list>, etc. as the content of a <table-wrap>
+     that does not contain a <table>. Added <disp-formula> to 
+     simple-intable-display.class.
+
+ 30. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 29. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 28. ALI (NISO Access and License Indicators)
+     - Added <ali:license_ref> to license-p.class, as 
+       alternatives inside <license>
+     - Created a new class: license.class to hold the new ALI
+       element <ali:free_to_read>, as an alternative to
+       <license> inside <permissions>. 
+
+ 27. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 26. ADDED TO REFERENCES - Added the following elements to 
+     %references.class so that it would be allowed inside all 
+     citation types, product, et al.
+      - conf-acronym
+      - data-title (for citing datasets and parts of datasets)
+      - version (for data and software, similar to edition)
+
+ 25. STATEMENT - Added new statement.class, so that statements
+     can be recursive.
+
+ 24. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+ 23. ADDRESS ELEMENTS IN NEW CLASSES
+      - Added 3 new elements: <city>, <state>, <postal-code>
+          - address.class
+          - address-line.class
+        which adds then to: address, addr-line, add, collab, 
+        conf-loc, corresp, publisher-loc      
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 22. NEW <era> ELEMENT
+     Added <era> to date-parts.class
+
+ 21. NEW CLASSES
+     - def-item.class
+     - def-list.class
+     - list-item.class
+     - ref.class for use in <ref-list>
+     - unstructured-kwd-group.class for use in Green
+
+ 20. NEW CODE ELEMENT- Added <code> to
+      - alternatives-display.class
+      - block-display.class
+      - block-display-noalt.class
+      - floats-display.class
+      - inside-chem-struct-wrap.class      
+      - simple-display.class
+      - simple-display-noalt.class
+      - simple-intable-display.class
+
+ 19. INSTITUTION-WRAP ADDED
+     Added the element <institution-wrap> to the following classes:
+      - address.class
+      - address-line.class
+      - recipient-name.class
+      - references.class
+
+ 18. RUBY
+     - Added <ruby> to emphasis class
+     - Added a face-markup class (all the emphasis class except 
+         <ruby>) for use inside <ruby>
+
+ 17. ADDED NEW CLASSES (for new locations for the elements)
+     - abstract.class
+     - kwd-group.class
+     - institution.class
+     - institution-wrap.class
+     
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+ 16. CITATION ALTERNATIVES - Added a new element 
+     <citation-alternatives> to the citation.class. The element
+     will hold, for example, a single citation in multiple
+     languages or a single citation tagged as a <mixed-citation>
+     complete with punctuation and spacing and also as an
+     <element-citation> with all punctuation and spacing removed.
+
+ 15. CONTRIBUTOR ID CLASS - Created a new class "contrib-id.class"
+     to hold identifiers for people such as contributors such
+     as <contrib> and <principal-investigator>s. This will hold
+     publishers-specific IDs, ORCIDs, and JST and NII identifiers.
+
+ 14. NESTED KEYWORD CLASS - Created a new class "nested-kwd.class"
+     to hold the kinds of keywords that can be used inside
+     a nested keyword structure.
+     
+ 13. COLLAB CLASS - Created a new class "collab.class" to hold 
+     only the element <collab>, for use in the element
+     <collab-alternatives>.
+
+ 12. COLLABORATION ALTERNATIVES - Added <collab-alternatives> to
+     the name.class and -references.class to allow the
+     <collab-alternatives> element to occur anywhere <collab> 
+     was already used.
+   
+ 11. STANDARDS CLASS - Created a new class "std.class" to hold all
+     the elements inside the <std> element within citations.
+   
+ 10. REFERENCES CLASS - Added <issn-l> to the class.
+   
+  9. NOTHING BUT PARA CLASS - Added a new %nothing-but-para.class;
+     to get rid of PE clashes when the entity %just-para.class; needed
+     to be expanded to include other elements. The nothing-but
+     parameter entity contains <p> and only <p> and should never
+     be changed in a customization. The infelicitously-named PE
+     %just-para.class; can be modified for a customization to include
+     other elements as well.
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  8. Updated the DTD-version attribute to "0.4" 
+   
+  7. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+  6. NEW CLASS FOR just <alt-text> %small-access.class;
+     Since not everything needs a <long-desc>
+
+  5. ALTERNATIVES - Added <private-char> so that the alternatives
+     wrapper may be used to hold alternative characters, some as
+     <private-char>, some as <textual-form>, some as <graphic>,
+     etc.
+
+  4. AFFILIATION ALTERNATIVES - Added the element <aff-alternatives>
+     to hold multiple <aff>s that are representations of a single
+     affiliation, for example, the name of an institution in two
+     languages or two scripts.
+      -  contrib-info.class
+      -  person-group-info.class
+      -  Made a new class %aff-alternatives.class to hold just
+         <aff> and <aff-alternatives> NEW PE
+
+  3. NAME ALTERNATIVES - Added a new container element to hold
+     alternate versions of a person's name, for example:
+       -  a Roman alphabet transliteration, the Japanese characters,
+          and the Japanese with Ruby annotations or
+       -  the full peerage title of a person as well as a name
+          that is just surname and given names
+       -  a name and a sort version of the name that transliterates
+          the diacritics (such as cedillas and umlauts) to the same
+          character with no diacritic.
+     a. This structure was added to name.class PE
+     b. This structure was added to %investigator-name.class;
+     c. This structure was added to %recipient-name.class;
+     d. This structure was added to %references.class;
+
+  2. ROLE - Added <role> to %person-group-info.class; thereby
+     adding it to: <person-group> and <sig-block>
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    CLASSES FOR COMMON ELEMENTS (%common.ent;) -->
+<!-- ============================================================= -->
+
+
+<!--                    ADDRESS CLASS ELEMENTS                     -->
+<!--                    Potential element components of an address;
+                        not a proper class                         -->
+<!ENTITY % address.class
+                        "addr-line | city | country | fax |
+                         institution | institution-wrap | phone |
+                         postal-code | state"                        >
+
+
+<!--                    ADDRESS LINE CLASS ELEMENTS                -->
+<!--                    Potential element components of an address;
+                        line not a proper class                    -->
+<!ENTITY % address-line.class
+                        "city | country | fax | institution | 
+                         institution-wrap | phone |
+                         postal-code | state"                        >
+
+
+<!--                    CITATION CLASS ELEMENTS                    -->
+<!--                    Reference to an external document, as used
+                        within, for example, the text of a
+                        paragraph                                  -->
+<!ENTITY % citation.class
+                        "citation-alternatives | element-citation | 
+                         mixed-citation"                             >
+
+
+<!--                    CITATION MINUS ALTERNATIVES CLASS ELEMENTS -->
+<!--                    All the citation elements except the
+                        <citation-alternatives> element.           -->
+<!ENTITY % citation-minus-alt.class
+                        "element-citation | mixed-citation | 
+                         nlm-citation"                               >
+
+
+<!--                    DEFINITION CLASS ELEMENTS                  -->
+<!--                    Definitions and other elements to match
+                        with terms and abbreviations               -->
+<!ENTITY % def.class    "def"                                        >
+
+
+<!--                    DEGREE CLASS                               -->
+<!--                    The academic or professional degrees that
+                        accompany a person's name                  -->
+<!ENTITY % degree.class "degrees"                                    >
+
+
+<!--                    IDENTIFIER CLASS ELEMENTS                  -->
+<!--                    DOIs and other identifiers are used by
+                        publishers at many levels, for example for
+                        an <abstract> or a <fig>.                  -->
+<!ENTITY % id.class     "object-id"                                  >
+
+
+<!--                    LABEL CLASS                                -->
+<!--                    The label element, used to hold the number
+                        or character of a labeled object such as a
+                        table or footnote                          -->
+<!ENTITY % label.class  "label"                                      >
+
+
+<!--                    NOTE CLASS ELEMENTS                        -->
+<!--                    A note may appear at the end of an Article
+                        or at the end of a Table.  For example, a
+                        typical end-of-article note is a
+                        "Note in Proof".                           -->
+<!ENTITY % note.class   "note"                                       >
+
+
+<!-- ============================================================= -->
+<!--                    PERSON NAMING ELEMENTS (%common.ent;)      -->
+<!-- ============================================================= -->
+
+
+<!--                    COLLAB CLASS                               -->
+<!--                    A class to hold the <collab> element, so that
+                        more than on collaboration can be named 
+                        inside <collab-alternatives>.              -->
+<!ENTITY % collab.class "collab"                                     >
+
+
+<!--                    INVESTIGATOR NAMES CLASS                   -->
+<!--                    The elements used to name the personal names
+                        for principal investigators.               -->
+<!ENTITY % investigator-name.class
+                        "name | name-alternatives | string-name"     >
+
+
+<!--                    NAMES ALTERNATIVES CLASS                   -->
+<!--                    Elements that may contain the name of a
+                        person. These elements act as alternatives
+                        inside the <name-alternatives> wrapper, to
+                        allow multiple versions of one person's name
+                        to be included. These variants are
+                        differentiated by attributes: @xml:lang for
+                        language, region, language variant, etc. and
+                        @specific-use for indexing names,
+                        search names, etc.                         -->
+<!ENTITY % name-alternatives.class
+                        "name | string-name"                         >
+
+
+<!--                    NAMES CLASS                                -->
+<!--                    The elements used to name the personal names
+                        for individuals and the collaboration names
+                        for groups.                                -->
+<!ENTITY % name.class   "anonymous | collab | collab-alternatives |
+                         name | name-alternatives | string-name"     >
+                         
+
+
+<!--                    PERSONAL NAMES CLASS                       -->
+<!--                    The element components of a person's name,
+                        for the name of a contributor              -->
+<!ENTITY % person-name.class
+                        "degrees | given-names | prefix | surname |
+                         suffix"                                     >
+
+
+<!--                    STRING NAME CLASS                          -->
+<!--                    The element <string-name> is most useful
+                        inside citations, but some tag sets restrict
+                        its use in metadata. A one-element class.  -->
+<!ENTITY % string-name.class
+                        "string-name"                                >
+
+
+<!--                    RECIPIENT NAMES CLASS                      -->
+<!--                    The elements used to name the personal names
+                        or corporate names (such as Labs) for
+                        funded award recipients                    -->
+<!ENTITY % recipient-name.class
+                        "name | name-alternatives | institution |
+                         institution-wrap | string-name"             >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA CONTRIBUTOR CLASSES;      -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR CLASS                          -->
+<!--                    Sometimes only the <contrib> element needs to
+                        be added to a model. Used mostly in the
+                        model for <contrib-group>.                 -->
+<!ENTITY % contrib.class
+                        "contrib"                                    >
+
+
+<!--                    CONTRIBUTOR GROUP CLASS                    -->
+<!--                    Sometimes only the <contrib-group> element
+                        needs to be added to a model.              -->
+<!ENTITY % contrib-group.class
+                        "contrib-group"                              >
+
+
+<!--                    CONTRIBUTOR IDENTIFIER CLASS               -->
+<!--                    Names the class to hold unique
+                        person identifiers, such as an ORCID or
+                        a trusted publisher identifier.            -->
+<!ENTITY % contrib-id.class
+                        "contrib-id"                                 >
+
+
+<!--                    CONTRIBUTOR INFORMATION CLASS              -->
+<!--                    Metadata about a contributor               -->
+<!ENTITY % contrib-info.class
+                        "address | aff | aff-alternatives |
+                         author-comment | bio | email |  etal |
+                         ext-link | on-behalf-of | role | uri | xref">
+
+
+<!--                    CONTRIBUTOR INFORMATION FOR REFERENCES     -->
+<!--                    The additions and alternatives to a person's
+                        name that may be used inside the element
+                        <person-group>                             -->
+<!ENTITY % person-group-info.class
+                        "aff | aff-alternatives | etal | role"       >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA CLASSES %articlemeta.ent; -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE IDENTIFIER CLASS ELEMENTS          -->
+<!--                    Collected article identifiers for use in
+                        various models.                            -->
+<!ENTITY % article-identifier.class
+                        "article-id | issn | issn-l | isbn"          >
+
+
+<!--                    ARTICLE VERSION CLASS ELEMENTS             -->
+<!--                    Making sure that wherever <article-version>
+                        is allowed, <article-version-alternatives>
+                        is also allowed.                           -->
+<!ENTITY % article-version.class
+                        "article-version |
+                         article-version-alternatives"               > 
+
+
+<!--                    ABSTRACT CLASS ELEMENTS                    -->
+<!--                    Potential element components of an address;
+                        not a proper class                         -->
+<!ENTITY % abstract.class
+                        "abstract"                                   >
+
+
+<!--                    AFFILIATIONS ALTERNATIVES CLASS            -->
+<!--                    The <aff> and <aff-alternatives> elements only
+                                                                   -->
+<!ENTITY % aff-alternatives.class
+                        "aff | aff-alternatives"                     >
+
+
+<!--                    CONFERENCE CLASS                           -->
+<!--                    The element components of the description
+                        of a conference; not a proper class        -->
+<!ENTITY % conference.class
+                        "conf-date | conf-name | conf-num |
+                         conf-loc | conf-sponsor | conf-theme |
+                         conf-acronym | string-conf"                 >
+
+
+<!--                    CORRESPONDING AUTHOR CLASS                 -->
+<!--                    Elements associated with the corresponding
+                        author                                     -->
+<!ENTITY % corresp.class
+                        "corresp"                                    >
+
+
+<!--                    DATE CLASS ELEMENTS                        -->
+<!--                    Dates and other matters of history         -->
+<!ENTITY % date.class   "date | string-date"                         >
+
+
+<!--                    DATE-ONLY CLASS ELEMENTS                   -->
+<!--                    Dates and other matters of history, when
+                        <string-date> is expressly not wanted.     -->
+<!ENTITY % date-only.class   
+                        "date"                                       >
+
+
+<!--                    DATE PARTS CLASS ELEMENTS                  -->
+<!--                    Components of date-style elements          -->
+<!ENTITY % date-parts.class
+                        "day | era | month | season | year"          >
+
+
+<!--                    EVENT CLASS ELEMENTS                       -->
+<!--                    Dates and other matters of history         -->
+<!ENTITY % event.class  "event"                                      >
+
+
+<!--                    INSTITUTION CLASS ELEMENTS                 -->
+<!--                    To hold an <institution> and its
+                        identifiers, so you always can use both
+                        together.                                  -->
+<!ENTITY % institution.class
+                        "institution | institution-id"               >
+
+
+<!--                    INSTITUTION CLASS ELEMENTS                 -->
+<!--                    To allow both of the institution elements to 
+                        be used anywhere one of them might be needed.
+                                                                   -->
+<!ENTITY % institution-wrap.class
+                        "institution | institution-wrap"             >
+
+
+<!--                    JOURNAL IDENTIFIER CLASS ELEMENTS          -->
+<!--                    The <journal-id> element and any synonyms.
+                        Created for use inside <related-article>.  -->
+<!ENTITY % journal-id.class
+                        "journal-id"                                 >
+
+
+<!--                    KEYWORD CLASS ELEMENTS                     -->
+<!--                    Keywords and any keyword-synonyms          -->
+<!ENTITY % kwd.class    "kwd | compound-kwd | nested-kwd"            >
+
+
+<!--                    KEYWORD GROUP CLASS ELEMENTS               -->
+<!--                    The element <kwd-group> for use in models. -->
+<!ENTITY % kwd-group.class    
+                        "kwd-group"                                  >
+
+
+<!--                    LICENSE CLASS ELEMENTS                     -->
+<!--                    The alternatives to <license> that may live
+                        inside <permissions>.                      -->
+<!ENTITY % license.class    
+                        "ali:free_to_read | license"                 >
+
+
+<!--                    LICENSE PARAGRAPH CLASS ELEMENTS           -->
+<!--                    To hold the paragraphs and license
+                        references that may be inside the element
+                        <license>.                                 -->
+<!ENTITY % license-p.class
+                        "ali:license_ref | license-p"                >
+
+
+<!--                    NESTED KEYWORD CLASS ELEMENTS              -->
+<!--                    The kinds of keywords that can be used inside
+                        a nested keyword structure.                -->
+<!ENTITY % nested-kwd.class    
+                        "kwd | compound-kwd"                         >
+
+
+<!--                    PUBLICATION DATE CLASS ELEMENTS            -->
+<!--                    New element <pub-date-not-available> added to
+                        <book-meta> as an alternative to <pub-date>. 
+                        The meaning is that a publication date was 
+                        (for whatever reason) not available. Presence 
+                        of the element says nothing about
+                        publication status. The element
+                        <pub-date-not-available> was NOT added to 
+                        this class, since the new element may
+                        occur only once.                           -->
+<!ENTITY % pub-date.class
+                        "pub-date"                                   >
+
+
+<!--                    SUBJECT GROUP CLASS ELEMENTS               -->
+<!--                    The element <subj-group> for use in models.-->
+<!ENTITY % subj-group.class    
+                        "subj-group"                                 >
+
+
+<!--                    TITLE CLASS                                -->
+<!--                    Title metadata element that can be used
+                        to provide article-like metadata about
+                        other objects, for example a <supplement>  -->
+<!ENTITY % title.class  "title"                                      >
+
+
+<!--                    UNSTRUCTURED KEYWORD GROUP CLASS           -->
+<!--                    The <unstructured-kwd-group> element for use 
+                        by itself.                                 -->
+<!ENTITY % unstructured-kwd-group.class  
+                        "unstructured-kwd-group"                     >
+
+
+<!--                    STRING DATE CLASS                          -->
+<!--                    The <string-date> element for use by itself.
+                                                                   -->
+<!ENTITY % string-date.class  
+                        "string-date"                                >
+
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER CLASSES (%backmatter.ent;)     -->
+<!-- ============================================================= -->
+
+
+<!--                    JUST APPENDIX CLASS                        -->
+<!--                    The appendix and only the appendix         -->
+<!ENTITY % app.class    "app"                                        >
+
+
+<!--                    BACK MATTER CLASS                          -->
+<!--                    Ancillary elements, typically used in the
+                        back matter of an article, section, etc.   -->
+<!ENTITY % back.class   "ack | app-group | bio | fn-group |
+                         glossary |  ref-list"                       >
+
+
+<!--                    FRONT MATTER CLASS                         -->
+<!--                    Ancillary elements, typically used in the
+                        front matter of an article, book, etc.  .  -->
+<!ENTITY % front.class  "ack | bio | fn-group | glossary"            >
+
+
+<!--                    FRONT AND BACK CLASS                       -->
+<!--                    Ancillary elements, typically used in the
+                        front or back matter of an article         -->
+<!ENTITY % front-back.class
+                        "notes"                                      >
+
+
+<!--                    SECTION BACK MATTER CLASS                  -->
+<!--                    Ancillary elements, typically used in the
+                        back matter of a section, etc.             -->
+<!ENTITY % sec-back.class
+                        "fn-group | glossary |  ref-list"            >
+
+
+<!--                    JUST SIGNATURE CLASS                       -->
+<!--                    The signature and only the signature <sig>
+                        for use inside <sig-block>s                -->
+<!ENTITY % sig.class    "sig"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    CLASSES USED IN DISPLAY ELEMENTS           -->
+<!-- ============================================================= -->
+
+
+<!--                    ACCESSIBILITY CLASS ELEMENTS               -->
+<!--                    Elements added to make it easier to process
+                        journal articles in ways that are more
+                        accessible to people and devices with special
+                        needs, for example the visually handicapped.
+                          <alt-text> is a short phrase description of
+                        an objects, <long-desc> is a more complete
+                        description of the content or intent of an
+                        object.                                    -->
+<!ENTITY % access.class "alt-text | long-desc"                       >
+
+
+<!--                    SMALL ACCESSIBILITY CLASS ELEMENTS         -->
+<!--                    Elements added to make it easier to process
+                        journal articles in ways that are more
+                        accessible to people and devices with special
+                        needs, for example the visually handicapped.
+                          <alt-text> is a short phrase description of
+                        an objects. This class is for use when
+                        <long-desc> is just too much.              -->
+<!ENTITY % small-access.class
+                        "alt-text"                                   >
+
+
+<!--                    CAPTION DISPLAY ELEMENTS                   -->
+<!--                    Basic figure display elements              -->
+<!ENTITY % caption.class
+                        "caption"                                    >
+
+
+<!--                    DISPLAY ELEMENT BACK MATTER ELEMENTS       -->
+<!--                    Miscellaneous stuff (such as photo credits or
+                        copyright statement) at the end of a display
+                        element such as a figure or a boxed text
+                        element such as a sidebar.                 -->
+<!ENTITY % display-back-matter.class
+                        "attrib | permissions"                       >
+
+
+<!-- ============================================================= -->
+<!--                    DISPLAY ELEMENTS CLASSES                   -->
+<!-- ============================================================= -->
+
+
+<!--                    DISPLAY CLASS ELEMENTS                     -->
+<!--                    Graphical or other image-related elements.
+                        The display elements may occur within
+                        the text of a table cell or paragraph
+                        although they are typically at the same
+                        hierarchical level as a paragraph.         -->
+<!ENTITY % block-display.class    
+                        "address | alternatives |
+                         answer | answer-set | array |
+                         block-alternatives | 
+                         boxed-text | chem-struct-wrap | code |
+                         explanation | 
+                         fig | fig-group | graphic | media |
+                         preformat | 
+                         question | question-wrap | 
+                         question-wrap-group |
+                         supplementary-material |
+                         table-wrap | table-wrap-group"              >
+
+
+<!ENTITY % block-display-noalt.class
+                        "address |
+                         answer | answer-set | array |
+                         block-alternatives | 
+                         boxed-text | chem-struct-wrap | code |
+                         explanation | 
+                         fig | fig-group | graphic | media |
+                         preformat | 
+                         question | question-wrap | 
+                         question-wrap-group |
+                         supplementary-material |
+                         table-wrap | table-wrap-group"              >
+
+
+<!--                    DISPLAY CLASS ELEMENTS MINUS EXPLANATION   -->
+<!--                    The same as block-display.class without
+                        the explanation element, for use in 
+                        <answer> and <option> elements.            -->
+<!ENTITY % block-display-minus-explanation.class
+                        "address | alternatives |
+                         answer | answer-set | array |
+                         block-alternatives | 
+                         boxed-text | chem-struct-wrap | code |
+                         fig | fig-group | graphic | media |
+                         preformat | 
+                         question | question-wrap | 
+                         question-wrap-group |
+                         supplementary-material |
+                         table-wrap | table-wrap-group"              >
+
+
+<!--                    FLOATING DISPLAY CLASS ELEMENTS            -->
+<!--                    Block display elements that can take the
+                        position attribute, and thus may be floating
+                        as opposed to fixed in narrative position in
+                        an article. Created for use as the content
+                        of <floats-group>.                         -->
+<!ENTITY % floats-display.class
+                        "alternatives | block-alternatives | 
+                         boxed-text |
+                         chem-struct-wrap | code | fig | fig-group |
+                         graphic | media | preformat |
+                         supplementary-material |
+                         table-wrap | table-wrap-group"              >
+
+
+<!--                    BLOCK ALTERNATIVES CLASS ELEMENTS          -->
+<!--                    Block display elements that can take the
+                        be used inside the <block-alternatives>
+                        element.                                   -->
+<!ENTITY % block-alternatives.class
+                        "boxed-text | fig | fig-group |
+                         table-wrap | table-wrap-group"              >
+
+
+<!--                    FIGURE DISPLAY ELEMENTS                    -->
+<!--                    Basic figure display elements              -->
+<!ENTITY % fig-display.class
+                        "fig | block-alternatives"                   >
+
+
+<!--                    INLINE DISPLAY CLASS ELEMENTS              -->
+<!--                    Non-block display elements that set or
+                        display inline with the text               -->
+<!ENTITY % inline-display.class
+                        "alternatives | inline-graphic |
+                         inline-media | 
+                         private-char"                               >
+
+
+<!ENTITY % inline-display-noalt.class
+                        "inline-graphic | 
+                         inline-media | private-char"                >
+
+
+<!--                    MOST BASIC DISPLAY ELEMENTS                -->
+<!--                    Just the few display elements that are
+                        simple display objects: a picture, a movie,
+                        a sound file.                              -->
+<!ENTITY % just-base-display.class
+                        "alternatives | graphic | media"             >
+
+
+<!ENTITY % just-base-display-noalt.class
+                        "graphic | media"                            >
+
+
+<!--                    SIMPLE DISPLAY ELEMENTS                    -->
+<!--                    The simplest and most basic of the Display
+                        Class elements, which may be allowed in many
+                        places, for example, inside other Display
+                        Class elements or inside the cell of a
+                        Table                                      -->
+<!ENTITY % simple-display.class
+                        "alternatives | array | code | graphic | 
+                         media | preformat"                          >
+
+
+<!ENTITY % simple-display-noalt.class
+                        "array | code | graphic | media | preformat" >
+
+<!--                    SIMPLE TABLE DISPLAY ELEMENTS              -->
+<!--                    Very similar to the simple-display.class, but
+                        Table Wrappers <table-wrap> should contain
+                        <table>s, <oasis:table>s, etc., not
+                        arrays.                                    -->
+<!ENTITY % simple-intable-display.class
+                        "alternatives | chem-struct-wrap | code |
+                         disp-formula | 
+                         graphic | media | preformat"                >
+
+
+<!--                    INSIDE CHEMICAL STRUCTURE ELEMENTS         -->
+<!--                    Very similar to the simple-display.class, but
+                        for use inside <chem-struct-wrap>, so it
+                        can contain both <chem-struct> and
+                        <textual-form>                             -->
+<!ENTITY % inside-chem-struct-wrap.class
+                        "alternatives | chem-struct | code | graphic |
+                         media | preformat | textual-form"           >
+
+
+<!--                    ALTERNATIVES DISPLAY CLASS ELEMENTS        -->
+<!--                    Display elements that can be alternatives to
+                        each  other inside an alternatives element.
+                                                                   -->
+<!ENTITY % alternatives-display.class
+                        "array | chem-struct | code | graphic |
+                         inline-graphic | inline-media | 
+                         inline-supplementary-material |
+                         media | preformat | private-char |
+                         supplementary-material | table |
+                         textual-form"                               >
+
+
+<!-- ============================================================= -->
+<!--                   QUESTION AND ANSWER CLASSES                 -->
+<!-- ============================================================= -->
+
+<!--                    QUESTION AND ANSWER CLASS                  -->
+<!--                    Questions and answers (also in block display
+                        class, for use in other places).           -->
+<!ENTITY % question-answer.class
+                        "answer | answer-set | explanation |
+                         question |
+                         question-wrap | question-wrap-group"        >
+
+
+<!--                    QUESTION WRAP CLASS                        -->
+<!--                    Class to hold just the element
+                        <question-wrap> for use in models.         -->
+<!ENTITY % question-wrap.class
+                        "question-wrap"                              >
+
+
+<!--                    OPTION-ONLY CLASS                          -->
+<!--                    Holds the <option> element, for use in 
+                        content models.                            -->
+<!ENTITY % option.class "option"                                     >
+
+
+
+<!-- ============================================================= -->
+<!--                    MATH CLASSES (%math.ent;)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHEMATICAL EXPRESSIONS AND FORMULAE
+                        CLASS ELEMENTS                             -->
+<!ENTITY % block-math.class
+                        "disp-formula | disp-formula-group"          >
+
+
+<!--                    CHEMICAL STRUCTURE WRAPPER CLASS           -->
+<!ENTITY % chem-struct-wrap.class
+                        "chem-struct-wrap"                           >
+
+
+<!--                    INLINE MATHEMATICAL EXPRESSIONS MIX CLASS
+                        ELEMENTS                                   -->
+<!ENTITY % inline-math.class
+                        "chem-struct | inline-formula"               >
+
+
+<!--                    MATHEMATICAL EXPRESSIONS CLASS ELEMENTS    -->
+<!ENTITY % math.class   "tex-math | mml:math"                        >
+
+
+<!--                    SIMPLE MATHML CLASS                        -->
+<!ENTITY % simple-math.class
+                        "mml:math"                                   >
+
+
+<!-- ============================================================= -->
+<!--                    FORMAT CLASSES (%format.ent;)              -->
+<!-- ============================================================= -->
+
+
+<!--                    APPEARANCE CLASS ELEMENTS                  -->
+<!--                    Names those elements (inherited from the
+                        XHTML table DTD that are only concerned with
+                        appearance, not with structure or content.
+                        Use of these elements is to be discouraged.-->
+<!ENTITY % appearance.class
+                        "hr"                                         >
+
+
+<!--                    FORCED BREAK FORMATTING CLASS ELEMENTS     -->
+<!--                    Element to force a formatting break such as
+                        a line break                               -->
+<!ENTITY % break.class  "break"                                      >
+
+
+<!--                    EMPHASIS/RENDITION ELEMENTS                -->
+<!--                    Elements concerning with marking the location
+                        of typographical emphasis (highlighting)
+                        DTD Design Note: There are no emphasis
+                        elements for <fractur>, <openface> (black
+                        board), <script>, etc. because this DTD
+                        recommends the use of the STIX extensions
+                        to accomplish this, as soon as they are
+                        available.                                 -->
+<!ENTITY % emphasis.class
+                        "bold | fixed-case | italic | monospace |
+                         overline | overline-start | overline-end |
+                         roman | sans-serif | sc | strike |
+                         underline | underline-start | 
+                         underline-end |
+                         ruby"                                       >
+
+
+<!--                    FACE MARKUP ELEMENTS                       -->
+<!--                    All of the emphasis/rendition elements
+                        except <ruby>, for use (initially) inside
+                        <ruby> itself.                             -->
+<!ENTITY % face-markup.class
+                        "bold | fixed-case | italic | monospace |
+                         overline | overline-start | overline-end |
+                         roman | sans-serif | sc | strike |
+                         underline | underline-start | 
+                         underline-end"                              >
+
+
+<!--                    UP/DOWN RENDITION ELEMENTS                 -->
+<!ENTITY % subsup.class "sub | sup"                                  >
+
+
+<!-- ============================================================= -->
+<!--                    LINK CLASSES (%link.ent;)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    ADDRESS LINK CLASS ELEMENTS                -->
+<!--                    Link elements that can be used inside
+                        addresses. This is essentially the three
+                        generic external links.
+                        (Note: in earlier releases, this Parameter
+                        Entity was named %address-elements;,
+                        although it functioned as a class.)        -->
+<!ENTITY % address-link.class
+                        "email | ext-link | uri"                     >
+
+
+
+<!--                    SIMPLE LINKS/CROSS-REFERENCES CLASS        -->
+<!--                    The smaller and simpler linking elements
+                        that might be inside, for example, a
+                        Keyword <kwd>                              -->
+<!ENTITY % simple-link.class
+                        "fn | target | xref"                         >
+
+
+<!--                    CROSS-REFERENCES CLASS                     -->
+<!--                    A class just to hold <xref>.               -->
+<!ENTITY % xref.class   "xref"                                       >
+
+
+<!-- ============================================================= -->
+<!--                    FOOTNOTE CLASSES (%link.ent;)              -->
+<!-- ============================================================= -->
+
+<!--                    FOOTNOTE LINKS CLASS                       -->
+<!--                    Only the most basic, internal links        -->
+<!ENTITY % fn-link.class
+                        "fn"                                         >
+
+
+<!--                    FOOTNOTE GROUP CLASS                       -->
+<!--                    Collections of footnotes                   -->
+<!ENTITY % fn-group.class
+                        "fn-group"                                   >
+
+
+<!-- ============================================================= -->
+<!--                    RELATED-OBJECT CLASSES                     -->
+<!-- ============================================================= -->
+
+
+<!--                    JOURNAL ARTICLE LINK CLASS ELEMENTS        -->
+<!--                    Links used inside journal articles, to point
+                        to related material                        -->
+<!ENTITY % article-link.class
+                        "inline-supplementary-material |
+                         related-article | related-object"           >
+
+
+<!--                    RELATED ARTICLE LINKS CLASS                -->
+<!--                    For using <related-article> at the paragraph
+                        level                                      -->
+<!ENTITY % related-article.class
+                        "related-article  | related-object"          >
+
+
+<!-- ============================================================= -->
+<!--                    LIST CLASSES (%list.ent;)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFINITION LIST CLASS ELEMENT              -->
+<!--                    Class for the <list-item>, so it may be used
+                        in OR groups.                              -->
+<!ENTITY % def-list.class   
+                        "def-list"                                   >
+
+
+<!--                    DEFINITION LIST ITEM CLASS ELEMENT         -->
+<!--                    Class for the <list-item>, so it may be used
+                        in OR groups.                              -->
+<!ENTITY % def-item.class   
+                        "def-item"                                   >
+
+
+<!--                    LIST CLASS ELEMENTS                        -->
+<!--                    All the types of lists that may occur
+                        as part of the text, therefore excluding
+                        Bibliographic Reference Lists <ref-list>   -->
+<!ENTITY % list.class   "def-list | list"                            >
+
+
+<!--                    LIST ITEM CLASS ELEMENT                    -->
+<!--                    Class for the <list-item>, so it may be used
+                        in OR groups.                              -->
+<!ENTITY % list-item.class   
+                        "list-item"                                  >
+
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH CLASSES (%para.ent;)             -->
+<!-- ============================================================= -->
+
+
+<!--                    REST OF PARAGRAPH CLASS                    -->
+<!--                    Information for the reader that is at the
+                        same structural level as a Paragraph.
+                        Contains all paragraph-level objects that are
+                        not also used inside tables and excepting
+                        also the paragraph element itself          -->
+<!ENTITY % rest-of-para.class
+                        "ack | disp-quote | speech | statement |
+                         verse-group"                                >
+
+
+<!--                    IN TABLE PARAGRAPH CLASS                   -->
+<!--                    The simpler of the paragraph-level elements
+                        that might be found inside a table cell or
+                        as alternatives to a <table> inside
+                        <table-wrap>.                              -->
+<!ENTITY % intable-para.class
+                        "disp-quote | speech | statement |
+                         verse-group"                                >
+
+
+<!--                    JUST PARAGRAPH CLASS                       -->
+<!--                    Set by default to hold the just the Paragraph 
+                        element, alone. This parameter entity may
+                        be redefined by a customization to name any
+                        element(s) that the Tag Set wishes to be
+                        able to use anywhere within textual elements
+                        that a paragraph may occur. Such elements
+                        would also need to be added to the PE
+                        %block-display.class; and to some individual
+                        element PEs.                               -->
+<!ENTITY % just-para.class
+                        "p"                                          >
+
+
+<!--                    NOTHING BUT PARAGRAPH CLASS                -->
+<!--                    To hold the paragraph element <p>, alone.
+                        This parameter entity should be left
+                        untouched by any customization             -->
+<!ENTITY % nothing-but-para.class
+                        "p"                                          >
+
+
+<!--                    STATEMENT CLASS                            -->
+<!--                    To hold the paragraph element <statement>, 
+                        alone.                                     -->
+<!ENTITY % statement.class
+                        "statement"                                  >
+
+
+<!-- ============================================================= -->
+<!--                    PHRASE CLASSES (%phrase.ent;)              -->
+<!-- ============================================================= -->
+
+
+<!--                    ABBREVIATION CLASS ELEMENTS                -->
+<!--                    The element <abbrev>, so it can be added
+                        to title elements without adding milestones.
+                                                                   -->
+<!ENTITY % abbrev.class "abbrev"                                     >
+
+
+<!--                    FUNDING CLASS ELEMENTS                     -->
+<!--                    Small inline elements, that surround a word
+                        or phrase in the text to identify pieces of
+                        funding metadata. where such material is not
+                        pulled out separately but just mixed into
+                        text as phrases or sentences within a
+                        paragraph. These elements may be used to mark,
+                        for example, the <award-id> (such as a grant
+                        number or contract number) or the
+                        <funding-source> such as the sponsoring
+                        organization or trust that awarded the grant.
+                                                                   -->
+<!ENTITY % funding.class
+                        "award-id | funding-source | open-access"    >
+
+
+<!--                    PHRASE CLASS ELEMENTS                      -->
+<!--                    Small inline elements, that surround a word
+                        or phrase in the text because the subject
+                        (content) should be identified as something
+                        special or different                       -->
+<!ENTITY % phrase.class "abbrev | 
+                         index-term | index-term-range-end |
+                         milestone-end | milestone-start |
+                         named-content | styled-content"             >
+
+
+<!--                    STYLED CONTENT CLASS ELEMENTS              -->
+<!--                    The <styled-content> element alone, so it
+                        can be used in places where emphasis is used.
+                                                                   -->
+<!ENTITY % styled-content.class
+                        "styled-content"                             >
+
+
+<!--                    PHRASE CONTENT CLASS ELEMENTS              -->
+<!--                    Small inline elements, that surround a word
+                        or phrase in the text because the subject
+                        (content) should be identified as something
+                        special or different. This class in is
+                        intended to be a subset of the  Phrase Class,
+                        for use in restricted situations, such as
+                        within metadata paragraphs, to record
+                        publisher-identified semantic or usage
+                        material.                                  -->
+<!ENTITY % phrase-content.class
+                        "named-content | styled-content"             >
+
+
+<!--                    PRICE CLASS ELEMENTS                       -->
+<!--                    Created to hold the <price> element so that
+                        it can be selectively added to elements,
+                        initially to <product>.                    -->
+<!ENTITY % price.class  "price"                                      >
+
+
+<!--                    PRODUCT ELEMENTS                           -->
+<!--                    Created to hold the <product> element so that
+                        it can be selectively added to elements,
+                        initially to <note>.                       -->
+<!ENTITY % product.class
+                        "product"                                    >
+
+
+<!-- ============================================================= -->
+<!--                    REFERENCES CLASSES (references.ent)        -->
+<!-- ============================================================= -->
+
+
+<!--                    BIBLIOGRAPHIC REFERENCE (CITATION) CLASS   -->
+<!--                    The elements that may be included inside a
+                        citation (bibliographic reference), either
+                        in an all-element-content (<element-citation>)
+                        or in a mixed-content citation
+                        (<mixed-citation>).                        -->
+<!ENTITY % references.class
+                        "annotation | article-title | chapter-title |
+                         collab | collab-alternatives |comment | 
+                         conf-acronym | conf-date | conf-loc | 
+                         conf-name | conf-sponsor | 
+                         data-title | date | date-in-citation | 
+                         day | edition |  email | elocation-id |  
+                         etal | ext-link | fpage |
+                         gov | institution | institution-wrap |
+                         isbn | issn | issn-l | 
+                         issue | issue-id | issue-part | issue-title |
+                         lpage | month | name | name-alternatives |
+                         object-id | page-range | part-title |
+                         patent | person-group | pub-id |
+                         publisher-loc | publisher-name | role |
+                         season | series | size | source | std |
+                         string-date | string-name | supplement |
+                         trans-source | trans-title | uri | version |
+                         volume | volume-id | volume-series | year"  >
+
+
+<!--                    JUST REFERENCE-LIST CLASS                  -->
+<!--                    The reference list and only the reference
+                        list                                       -->
+<!ENTITY % ref-list.class
+                        "ref-list"                                   >
+
+
+<!--                    STANDARDS CLASS                            -->
+<!--                    The elements that can be used in the mixed
+                        content model of a <std>, which is a
+                        cited standard inside a citation:
+                          source contains the name of the standard
+                          pub-id contains the standard designator
+                          date elements name the official date
+                          std-organization names the standards body
+                          named-content takes anything else a 
+                            publisher/archive needs (come in 
+                            from %rendition-plus.                  -->
+<!ENTITY % std.class    "day | month | pub-id | source | 
+                         std-organization | year"                    >
+
+
+<!--                    JUST REFERENCE CLASS                       -->
+<!--                    The element <ref> for use in models.       -->
+<!ENTITY % ref.class    "ref"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    SECTION CLASS (%section.ent;)              -->
+<!-- ============================================================= -->
+
+
+<!--                    SECTION CLASS ELEMENTS                     -->
+<!--                    Information for the reader that is at the
+                        same structural level as a Section, which is
+                        a headed structure full of smaller elements
+                        such as paragraphs.                        -->
+<!ENTITY % sec.class    "sec"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    TABLE MODEL CLASSES                        -->
+<!-- ============================================================= -->
+
+
+<!--                    JUST TABLE CLASS                           -->
+<!--                    To include just a table <table-wrap>
+                        element                                    -->
+<!ENTITY % just-table.class
+                        "table-wrap"                                 >
+
+
+<!--                    TABLE CLASS ELEMENTS                       -->
+<!--                    Elements that will be used to contain the
+                        rows and columns inside the Table Wrapper
+                        element <table-wrap>.  The following elements
+                        can be set up for inclusion:
+                          XHTML Table Model    table               -->
+<!ENTITY % table.class  "table"                                      >
+
+
+<!--                    TABLE FOOT CLASS                           -->
+<!--                    Elements to include at the end of a table
+                        in the table.                              -->
+<!ENTITY % table-foot.class
+                        "table-wrap-foot"                            >
+
+
+<!--                    TABLE BODY CLASS                           -->
+<!--                    To include just a table <table-wrap>
+                        element                                    -->
+<!ENTITY % tbody.class  "tbody"                                      >
+
+
+<!-- ================== End Journal Suite Default Classes  ======= -->
diff --git a/dtd/JATS-default-mixes1-3.ent b/dtd/JATS-default-mixes1-3.ent
new file mode 100644
index 0000000..e4d14bc
--- /dev/null
+++ b/dtd/JATS-default-mixes1-3.ent
@@ -0,0 +1,630 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Default Element Mixes Module                      -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) Default Element Mixes Module v1.3 20210610//EN"
+Delivered as file "JATS-default-mixes1-3.ent"                      -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Declares default values for all the element mixes -->
+<!--             used in the content models of the DTD Suite       -->
+<!--                                                               -->
+<!--             Mixes are Or-groups of classes, used in many      -->
+<!--             different content models. Mixes should not use    -->
+<!--             element names directly, only through classes.     -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called after the    -->
+<!--             customize mixes module (if any).                  -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 19. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+ 18. TABLE CELLS - Added new elements to <td> using %inside.cell;
+     and <entry> using %Flowmix;:
+        <disp-quote>, <speech>, <statement>, <verse-group>
+ 
+ 17. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ===============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+   
+ 16. QUESTIONS AND ANSWERS
+
+     - NEW PE for ANSWERS  - Added new mix "answer para level"
+       to name the elements that may be used at the same
+       structural level as a paragraph, when used inside an 
+       <answer>. This rather awkward parameter entity was created
+       to overcome the DTD determinism issues when using 
+       <explanation> inside an <answer>. In order for 
+       <explanation> to be used at the end of an answer, 
+       it must not be allowed at the paragraph level
+       inside <answer>.
+     
+     - INSIDE TABLE CELLS - Added the question answer class
+       to the contents of table cell using inside cell mix.
+  
+ 15. LINKING TABLES TO SUPPLEMENTARY MATERIAL
+ 
+     - Added the <xref> element (for an internal cross-reference)
+       to the large OR-group inside the body of a <table-wrap>, to
+       be used to make a link to a <supplementary-material>
+       element as a way of recording that a dataset or similar is
+       the data from which the table was derived.
+        
+ 14. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+    
+ 13. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 12. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 11. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 10. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  9. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  8. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+    
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  6. PARAGRAPH IN TABLE CELL - Added <p> to the contents of
+     table cells, through %inside-cell; (using
+     %nothing-but-para.class;).
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. PARA-LEVEL PARAMETER ENTITY CONFLICT - Changed the parameter
+     entity %para-level; to use the PE %nothing-but-para.class;,
+     removing the similar PE "just-para.class;". It is possible to 
+     add element(s) to %just-para.class;, so that the added element(s)
+     may be used everywhere <p> is used. Such elements would also be
+     named in %block-display.class;. This would lead to a conflict
+     in %para-level; if both %just-para.class; and
+     %block-display.class; named <p>. So %just-para.class; is replaced
+     here in %para-level;. This is backward compatible for all XML
+     documents. If a JATS customization has modified %just-para.class;
+     they may need to change their customization to accommodate.
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    ELEMENT MIXES FOR USE IN CONTENT MODELS    -->
+<!--                    (MIXES ARE COMPOSED USING CLASSES)         -->
+<!-- ============================================================= -->
+
+
+<!--                    SECTION-LEVEL ELEMENTS                     -->
+<!--                    Elements that may be used at the same
+                        structural level as a Section for example
+                        inside the Body <body>                     -->
+<!ENTITY % sec-level    "%sec.class;"                                >
+
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENT MIXES(%backmatter.ent;)-->
+<!-- ============================================================= -->
+
+
+<!--                    DOCUMENT BACK MATTER ELEMENTS              -->
+<!--                    Back Matter Elements used by a full document
+                        such as a journal article. This is an element
+                        grouping rather than a class. These
+                        elements may also appear in the content models
+                        of structural elements, such as back matter.
+                        (Note: Technically this should have used
+                        %sec.class;, but %sec-level; was used in an
+                        earlier release and backwards compatibility
+                        must be maintained.                        -->
+<!ENTITY % doc-back-matter-mix
+                        "%back.class; | %front-back.class; |
+                         %sec.class;"                                >
+
+
+<!--                    SECTION BACK MATTER ELEMENTS               -->
+<!--                    Back matter elements used inside smaller
+                        structures, such as sections and sidebars  -->
+<!ENTITY % sec-back-matter-mix
+                        "%front-back.class; | %sec-back.class;"      >
+
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH-LEVEL ELEMENT MIXES              -->
+<!-- ============================================================= -->
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!--                    Elements that may be used at the same
+                        structural level as a paragraph, for
+                        example inside a Section
+                        Note: There a major overlap between this
+                        parameter entity and that for the elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a
+                        paragraph, but block elements such as quotes
+                        and lists may appear either within a
+                        paragraph or at the same level as a
+                        paragraph. This serves a requirement in a
+                        repository DTD, since some incoming material
+                        will have restricted such elements to only
+                        inside a paragraph,  some incoming material
+                        will have restricted them to only outside a
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.                      -->
+<!ENTITY % para-level   "%block-display.class; | %block-math.class; |
+                         %list.class; | %math.class; | 
+                         %nothing-but-para.class; | 
+                         %related-article.class; |
+                         %rest-of-para.class;"                       >
+
+
+<!--                    INSIDE AN ANSWER PARAGRAPH-LEVEL ELEMENTS  -->
+<!--                    The elements that may be used at the same
+                        structural level as a paragraph, when 
+                        used inside an <answer>.
+                        Remarks: This rather awkward parameter entity
+                        was created to overcome the DTD determinism
+                        issues when using <explanation> inside
+                        an <answer>. In order for <explanation> to
+                        be used at the end of an answer, it must
+                        not be allowed at the paragraph level inside
+                        <answer>.                                  -->
+<!ENTITY % answer-para-level   
+                        "%block-display-minus-explanation.class; | 
+                         %block-math.class; |
+                         %list.class; | %math.class; |
+                         %nothing-but-para.class; |
+                         %related-article.class; |
+                         %rest-of-para.class;"                       >
+
+<!-- ============================================================= -->
+<!--                    TABLE ELEMENT MIXES                        -->
+<!-- ============================================================= -->
+
+
+<!--                    INSIDE TABLE CELL ELEMENTS                 -->
+<!--                    Mixed with #PCDATA inside a table cell, such
+                        as a <td> or <th> element in the XHTML table
+                        model, the <entry> element in the OASIS CALS
+                        table model, etc.  This PE will be used as the
+                        value of %Flow.mix;, %paracon;, etc.
+                        ### Usage Alert ###
+                        Design Note: Inside cell is an exception, an
+                        inline mix that does not start with an OR
+                        bar. This is because is used within the
+                        PE -%Flow.mix;, which is an inline mix
+                        defined in the course of the XHTML Table DTD,
+                        a DTD not under control of this DTD Suite. -->
+<!ENTITY % inside-cell  "%address-link.class; |  %appearance.class; |
+                         %article-link.class; |
+                         %block-math.class; | %break.class; |
+                         %citation.class; | %emphasis.class; |                         
+                         %inline-display-noalt.class; |
+                         %inline-math.class; | %intable-para.class; |
+                         %list.class; | %math.class; |
+                         %nothing-but-para.class; |
+                         %phrase.class; | %simple-display.class; | 
+                         %question-answer.class; |
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!--                    INSIDE TABLE WRAPPER ELEMENTS              -->
+<!--                    Usually a Table Wrapper contains a table,
+                        properly tagged with rows and columns, but
+                        sometimes, a structure that is labeled as
+                        a "table" is actually a list, or two
+                        paragraphs.  This Parameter Entity names
+                        all the alternatives to table that may
+                        occur inside a table wrapper.              -->
+<!ENTITY % inside-table-wrap
+                        "%intable-para.class; | %list.class; |
+                         %simple-intable-display.class;  |
+                         %table.class; | %xref.class;"               >
+
+
+<!-- ============================================================= -->
+<!--                    INLINE ELEMENT MIXES                       -->
+<!-- ============================================================= -->
+
+
+<!--                    EMPHASIS MIX ELEMENTS                      -->
+<!--                    Elements that may be used inside most of the
+                        emphasis class elements
+                        Design Note: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % emphasized-text
+                        "| %address-link.class; |
+                         %article-link.class; | %emphasis.class;  |
+                         %inline-display.class; |
+                         %inline-math.class; | %math.class; |
+                         %phrase.class; | %simple-link.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    JUST RENDITION                             -->
+<!--                    Only the simplest of the typographic
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be stripped down to only
+                        subscript and superscript by some, more
+                        restrictive DTDs.
+                        MAINTENANCE NOTE: This Parameter Entity
+                        and the related PE "rendition-plus" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to change similar models individually .
+                        Design Note: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % just-rendition
+                        "| %emphasis.class;  | %subsup.class; |
+                         %phrase-content.class;"                     >
+
+
+<!--                    RENDITION MARKUP PLUS                      -->
+<!--                    Only the simplest of the typographic
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be enhanced slightly in some
+                        more permissive DTDs, and should always
+                        contain at least typographic emphasis,
+                        subscript, and superscript.
+                        MAINTENANCE NOTE:: This Parameter Entity
+                        and the related PE "just-rendition" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to individually change similar models.
+                        modify entire groups of elements, but not
+                        to change similar models individually .
+                        Design Note: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % rendition-plus
+                        "| %emphasis.class;  | %subsup.class; |
+                         %phrase-content.class;"                     >
+
+
+<!--                    SIMPLE PHRASE-LEVEL TEXTUAL ELEMENTS       -->
+<!--                    Elements that may be used almost anywhere
+                        text is used, for example, inside a title.
+                        Simple text plus inline display and math
+                        elements. In practice, This is the next step
+                        up from "simple-text", adding the links.
+                        Design Note: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % simple-phrase
+                        "| %address-link.class; |
+                         %article-link.class; | %emphasis.class; |
+                         %inline-display.class; |
+                         %inline-math.class; | %math.class; |
+                         %phrase.class; | %simple-link.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    SIMPLE TEXTUAL CONTENT                     -->
+<!--                    Elements that may be used inside elements
+                        that are really expected to be #PCDATA and
+                        not to contain any of these things.
+                        Note that there is only inline math and no 
+                        links.
+                        Simpler even than %simple-phrase;
+                        Design Note: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % simple-text  "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %phrase.class; |
+                         %subsup.class; "                            >
+
+
+<!-- ================== End Archiving DTD Mixes Customization ==== -->
diff --git a/dtd/JATS-display1-3.ent b/dtd/JATS-display1-3.ent
new file mode 100644
index 0000000..0c5bd17
--- /dev/null
+++ b/dtd/JATS-display1-3.ent
@@ -0,0 +1,1299 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Display Class Elements                            -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Display Class Elements v1.3 20210610//EN"
+     Delivered as file "JATS-display1-3.ent"                       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                     -->
+<!--                                                               -->
+<!-- PURPOSE:    Describes display-related elements such as        -->
+<!--             Figures, Graphics, Math, Chemical Structures,     -->
+<!--             Graphics, etc.                                    -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 34. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 33. OBJECT ID Added <object-id> to: 
+        <block-alternatives>, <fig-group>, <table-wrap-group> 
+
+ 32. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 31. MEDIA MODEL - Added <xref> to media model and graphic model.
+      
+ 30. NEW BLOCK ALTERNATIVES - Added new block element
+     <block-alternatives> to hold block-level processing
+     alternatives, such as the same figure in two languages.
+     The new element can be used anywhere figure is used.
+      
+ 29. ADDED SUBJECTS TO WHEREVER KEYWORDS ALLOWED - Added
+     <subj-group> directly to the following elements:
+      - chem-struct-wrap 
+      - fig and fig-group
+      - graphic
+      - media
+      - supplementary-material (thru fig-model)
+      - table-wrap and table-wrap-group
+ 
+ 28. MULTI-LANGUAGE FIGURE AND TABLE LABELS AND CAPTIONS
+
+     - Made <label> repeatable inside <fig> and
+       <fig-group> to allow both labels and captions to 
+       repeat to be tagged in multiple languages:
+         label   xml-lang="a"
+         label   xml-lang="b"
+         caption xml-lang="a"
+         caption xml-lang="a"
+ 
+     - Made <label> repeatable inside <fig-model> to allow for
+       both labels and captions to be tagged in multiple
+       languages:
+         label   xml-lang="a"
+         label   xml-lang="b"
+         caption xml-lang="a"
+         caption xml-lang="a"
+          
+      - Similar change inside <table-wrap> for the same reason.
+        
+      - Similar change inside <table-wrap-group> for the same reason.
+ 
+ 27. LINKING TABLES TO SUPPLEMENTARY MATERIAL
+ 
+     - Added the <xref> element (for an internal cross-reference)
+       to the large OR-group inside the body of a 
+       <table-wrap-group>, to be used to make a link to a 
+       <supplementary-material> element as a way of recording 
+       that a dataset or similar is the data from which the 
+       tables in the <table-wrap-group> were derived.
+  
+ 25. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 24. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 23. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+     =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 22. INLINE-MEDIA - Added new element <inline-media>, which is to
+     <media> as <inline-graphic> is to <graphic>. The content
+     model is the same as <inline-supplementary-material>, in
+     other words there should be content, this is not typically 
+     an empty element. The attributes are the same as <media>,
+     except without @position and @orientation.
+
+ 21. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 20. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+     
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 19. INLINE GRAPHIC and PRIVATE-CHAR - Both <inline-graphic> and
+     <private-char> added to elements allowed in <code>.
+ 
+ 18. INLINE GRAPHIC - Changed from small-access.class to
+     access.class to add <long-desc>
+ 
+ 17. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 16. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 15. JATS became version "1.1d3" and "v1.1d3 20150301"
+ 
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  14. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 13. CAPTION ATTRIBUTE - Changed the mechanism by which the @style
+      attribute is associated with the element <caption>. 
+      Previously, the <caption> element's base attributes were 
+      declared in this module and additional attributes (@style) 
+      for it were declared in the XHTML Table Module. The @style 
+      attribute is now declared in this module, and the caption 
+      attributes in the XHTML table model have been set to IGNORE. 
+      This was done to make sure that the attributes available on 
+      the JATS <caption> element did not change based on which table
+      model a JATS user was using.
+
+ 12. CODE - Added the new element <code> (using code-atts and
+     code-elements). Resembles <preformat>, but different
+     semantics.
+
+ 11. CAPTION ATTRIBUTES - Added the new PE %jats-common-atts; to
+     the caption attributes, even though doing so while making
+     no other changes would mean multiple definitions
+     of the @id and @content-type attributes. This would produce a
+     warning, which should be ignored, so see item #13 above.
+
+ 10. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+  9. ABSTRACT AND KEYWORDS ON NEW STRUCTURES
+     - Added <abstract> (through %abstract.class;) and <kwd-group> 
+       (through %kwd-group.class;) to the following elements:
+        - chem-struct-wrap (through %chem-struct-wrap-model;)
+        - fig (through %fig-model;)
+        - fig-group (through %fig-group-model;)
+        - graphic (through %graphic-model;)
+        - media (through %media-model;)
+        - table-wrap (through %table-wrap-model;)
+        - table-wrap-group (through %table-wrap-group-model;)
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  8. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  7. Updated the DTD-version attribute to "0.4" 
+   
+  6. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  5. INLINE GRAPHIC - Uses new class %small-access.class; (no
+     model change)
+
+  4. POSITION ATTRIBUTE - Added the value "background"
+
+  3. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to %display-atts;. If these attribute were
+     already part of the list, deleted them. These attributes were
+     added to:
+      - array       (already there)
+      - boxed-text  (already there)
+      - caption     (already there)
+      - chem-struct (added @xml:lang, @specific-use already)
+      - chem-struct-wrap (added @xml:lang, @specific-use already)
+      - fig (already there)
+      - fig-group (added @xml:lang, @specific-use already there)
+      - graphic (added @xml:lang, @specific-use already there)
+      - inline-graphic (both)
+      - media (added @xml:lang, @specific -use already there)
+      - preformat (already there)
+      - supplementary-material (already there)
+      - table-wrap (already there)
+      - table-wrap-group (added @xml:lang, @specific -use
+          already there)
+
+  2. GRAPHIC MODEL - Removed the dependency which had both
+     <graphic> and <media> modeled with the same parameter
+     entity %graphic-model. Created new PE for %media-model;
+     but set it (as the default) to %graphic-model so that no
+     customization would break. NEW PE
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    ATTRIBUTES FOR MULTIPLE ELEMENTS           -->
+<!-- ============================================================= -->
+
+
+<!--                    DISPLAY ATTRIBUTES                         -->
+<!--                    Attributes used for several of the block
+                        display elements                           -->
+<!ENTITY % display-atts
+            "position   (anchor | background | float | margin)
+                                                          'float'
+             orientation
+                        (portrait | landscape)            'portrait'
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    SPECIFIC ATTRIBUTE LISTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    ARRAY ATTRIBUTES                           -->
+<!--                    Attributes for the <array> element         -->
+<!ENTITY % array-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             orientation
+                        (portrait | landscape)            'portrait'
+             xml:lang   NMTOKEN                           #IMPLIED" >
+
+
+<!--                    BLOCK ALTERNATIVES ATTRIBUTES              -->
+<!--                    Attributes for the <block-alternatives> 
+                        element                                    -->
+<!ENTITY % block-alternatives-atts
+            "%jats-common-atts;"                                     >               
+
+<!--                    BOXED TEXT ATTRIBUTES                      -->
+<!--                    Attributes for the <boxed-text> element    -->
+<!ENTITY % boxed-text-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    CAPTION ATTRIBUTES                         -->
+<!--                    Attributes for <caption> element           -->
+<!--                    The attribute @style was added to make all
+                        JATS captions the same as XHTML table
+                        captions.                                  -->
+<!ENTITY % caption-atts
+            "%jats-common-atts;
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED 
+             style      CDATA                             #IMPLIED"  >
+
+<!--                    CHEMICAL STRUCTURE ATTRIBUTES              -->
+<!--                    Attributes for <chem-struct>, a wrapper
+                        around one (typically inline) chemical
+                        structure, or one of several structures in
+                        a <chem-struct-wrap>                       -->
+<!ENTITY % chem-struct-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    CHEMICAL STRUCTURE WRAPPER ATTRIBUTES      -->
+<!--                    Attributes for the <chem-struct-wrap>
+                        element, the outer wrapper around one or more
+                        block-level chemical structures            -->
+<!ENTITY % chem-struct-wrap-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                   CODE ATTRIBUTES                             -->
+<!--                   Attributes for the <code> element           -->
+<!ENTITY % code-atts
+            "%jats-common-atts;                                       
+             code-type          CDATA                     #IMPLIED
+             code-version       CDATA                     #IMPLIED
+             executable         (yes | no)                #IMPLIED
+             language           CDATA                     #IMPLIED
+             language-version   CDATA                     #IMPLIED
+             platforms          CDATA                     #IMPLIED
+             %display-atts;
+             xml:space (default | preserve)       #FIXED 'preserve'" >
+
+
+<!--                    FIGURE ATTRIBUTES                          -->
+<!--                    Attributes for Figures <fig>               -->
+<!ENTITY % fig-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              fig-type  CDATA                             #IMPLIED"  >
+
+
+<!--                    FIGURE GROUP ATTRIBUTES                    -->
+<!--                    Attributes for Figure Groups <fig-group>   -->
+<!ENTITY % fig-group-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED "  >
+
+
+<!--                    GRAPHIC ATTRIBUTES                         -->
+<!--                    Attributes for the <graphic> element       -->
+<!ENTITY % graphic-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED
+              mime-subtype
+                        CDATA                             #IMPLIED
+              mimetype  CDATA                             #IMPLIED
+              %link-atts;"                                           >
+
+
+<!--                    INLINE GRAPHIC ATTRIBUTES                  -->
+<!--                    Attributes for the <inline-graphic> element-->
+<!ENTITY % inline-graphic-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             baseline-shift
+                        CDATA                             #IMPLIED
+             mimetype   CDATA                             #IMPLIED
+             mime-subtype
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %link-atts;"                                            >
+
+
+<!--                    MEDIA ATTRIBUTES                           -->
+<!--                    Attributes for the <media> element         -->
+<!ENTITY % inline-media-atts
+            "%jats-common-atts;                                       
+              content-type
+                         CDATA                            #IMPLIED
+              mimetype   CDATA                            #IMPLIED
+              mime-subtype
+                         CDATA                            #IMPLIED
+              vocab      CDATA                            #IMPLIED
+              vocab-identifier
+                         CDATA                            #IMPLIED
+              vocab-term CDATA                            #IMPLIED
+              vocab-term-identifier
+                         CDATA                            #IMPLIED
+              specific-use
+                         CDATA                            #IMPLIED
+              xml:lang   NMTOKEN                          #IMPLIED
+              %link-atts;"                                           >
+
+
+<!--                    MEDIA ATTRIBUTES                           -->
+<!--                    Attributes for the <media> element         -->
+<!ENTITY % media-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED
+              mimetype  CDATA                             #IMPLIED
+              mime-subtype
+                        CDATA                             #IMPLIED
+              %link-atts;"                                           >
+
+
+<!--                   PREFORMATTED TEXT ATTRIBUTES                -->
+<!--                   Attributes for the <preformat> element      -->
+<!ENTITY % preformat-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              preformat-type
+                        CDATA                             #IMPLIED
+              xml:space (default | preserve)     #FIXED 'preserve'"  >
+
+
+<!--                    SUPPLEMENTARY INFORMATION ATTRIBUTES       -->
+<!--                    Attributes for Supplementary Material
+                        <supplementary-material>                   -->
+<!ENTITY % supplementary-material-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED
+              mimetype  CDATA                             #IMPLIED
+              mime-subtype
+                        CDATA                             #IMPLIED
+              %might-link-atts;"                                     >
+
+
+<!-- ============================================================= -->
+<!--                    BLOCK-LEVEL PROCESSING ALTERNATIVES        -->
+<!-- ============================================================= -->
+
+
+<!--                    BLOCK ALTERNATIVES MODEL                   -->
+<!--                    Model for the <alternatives> processing
+                        alternatives element                       -->
+<!ENTITY % block-alternatives-model
+                        "( (%id.class;)*, 
+                           (%block-alternatives.class;)+ )"          >
+
+
+
+<!--                    BLOCK-LEVEL ALTERNATIVES FOR PROCESSING    -->
+<!--                    Container element used to hold a group of
+                        block-level processing alternatives, for 
+                        example, the same figure, once in Spanish,
+                        once in English, and once in Portuguese.
+                        This element is a physical grouping to 
+                        contain multiple logically equivalent
+                        (substitutable) versions of the same 
+                        graphical object.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=block-alternatives
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=block-alternatives
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=block-alternatives
+                                                                   -->
+<!ELEMENT  block-alternatives 
+                        %block-alternatives-model;                   >
+<!ATTLIST  block-alternatives
+             %block-alternatives-atts;                               >
+
+
+<!-- ============================================================= -->
+<!--                    TABLE ATTRIBUTES                           -->
+<!-- ============================================================= -->
+
+
+<!--                    TABLE WRAPPER ATTRIBUTES                   -->
+<!--                    Attributes to be added to the regular NLM
+                        table attributes, for example, when the
+                        Elsevier or OASIS Exchange table models are
+                        used.                                      -->
+<!ENTITY % other-table-wrap-atts
+            ""                                                       >                                       
+
+
+<!--                    TABLE GROUP ATTRIBUTES                     -->
+<!--                    Attributes for groups of <table-wrap>
+                        elements <table-wrap-group>                -->
+<!ENTITY % table-wrap-group-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED
+              %other-table-wrap-atts;"                               >
+
+
+<!--                    TABLE WRAPPER ATTRIBUTES                   -->
+<!--                    Attributes for the <table-wrap> element,
+                        the container for <table>s                 -->
+<!ENTITY % table-wrap-atts
+            "%jats-common-atts;                                       
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED
+              %other-table-wrap-atts;"                               >
+
+
+<!--                    TABLE WRAP FOOT ATTRIBUTES                 -->
+<!--                    Attributes for the <table-wrap-foot> element
+                                                                   -->
+<!ENTITY % table-wrap-foot-atts
+            "%jats-common-atts;"                                     >                                       
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR CONTENT MODELS      -->
+<!-- ============================================================= -->
+
+
+<!--                    FIGURE-LIKE CONTENT MODEL                  -->
+<!--                    Content model for the Figure element and any
+                        similarly structured elements              -->
+<!ENTITY % fig-model    "((%id.class;)*, 
+                          (%label.class;)*, (%caption.class;)*,
+                          (%abstract.class;)*, (%kwd-group.class;)*,
+                          (%subj-group.class;)*, 
+                          (%access.class; | %address-link.class;)*,
+                          (%block-math.class; |
+                           %chem-struct-wrap.class; |
+                           %intable-para.class; |
+                           %just-table.class; | %just-para.class; |
+                           %list.class; | %simple-display.class; |
+                           %xref.class;)*,
+                          (%display-back-matter.class;)* )"          >
+
+
+<!-- ============================================================= -->
+<!--                    ARRAY ELEMENTS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    ARRAY CONTENT MODEL                        -->
+<!--                    Content model for the <array> element      -->
+<!ENTITY % array-model  "(label?,
+                          (%access.class; | %address-link.class;)*,
+                          ( (%just-base-display.class;)* |
+                            %tbody.class; ),
+                          (%display-back-matter.class;)* )"          >
+
+
+<!--                    ARRAY (SIMPLE TABULAR ARRAY)               -->
+<!--                    Used to define in-text table-like (columnar)
+                        material.  Uses the XHTML table body element
+                        or a graphic to express the rows and columns.
+                        These have neither labels nor captions,
+                        arrays with labels and captions are table
+                        wrappers.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=array
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=array
+                                                                   -->
+<!ELEMENT  array        %array-model;                                >
+<!ATTLIST  array
+             %array-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    BOXED TEXT ELEMENTS                        -->
+<!-- ============================================================= -->
+
+
+<!--                    BOXED TEXT MODEL                           -->
+<!--                    Complete content model for the boxed text
+                        element <boxed-text>                       -->
+<!ENTITY % boxed-text-model
+                        "((%id.class;)*, sec-meta?, label?, caption?,
+                          (%para-level;)*, (%sec-level;)*,
+                          (%sec-back-matter-mix;)*,
+                          (%display-back-matter.class;)* )"          >
+
+
+<!--                    BOXED TEXT                                 -->
+<!--                    Textual material that is outside the flow
+                        of the narrative text, for example, a
+                        sidebar, marginalia, text insert, caution or
+                        note box, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=boxed-text
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=boxed-text
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=boxed-text
+                                                                   -->
+<!ELEMENT  boxed-text   %boxed-text-model;                           >
+<!ATTLIST  boxed-text
+             %boxed-text-atts;                                       >
+
+
+<!-- ============================================================= -->
+<!--                    CHEMICAL STRUCTURE ELEMENTS                -->
+<!-- ============================================================= -->
+
+
+<!--                    CHEMICAL STRUCTURE WRAPPER MODEL           -->
+<!--                    Content model for the Chemical Structure
+                        Wrapper <chem-struct-wrap> element         -->
+<!ENTITY % chem-struct-wrap-model
+                        "((%id.class;)*, label?, (%caption.class;)?,
+                          (%abstract.class;)*, (%kwd-group.class;)*,
+                          (%subj-group.class;)*,
+                          (%access.class; | %address-link.class;)*,
+                          (%inside-chem-struct-wrap.class;)+,
+                          (%display-back-matter.class;)* )"          >
+
+
+<!--                    CHEMICAL STRUCTURE WRAPPER                 -->
+<!--                    A chemical expression, reaction, equation,
+                        etc. that is set apart within the text.
+                        These may be numbered.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=chem-struct-wrap
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=chem-struct-wrap
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=chem-struct-wrap
+                                                                   -->
+<!ELEMENT  chem-struct-wrap
+                        %chem-struct-wrap-model;                     >
+<!ATTLIST  chem-struct-wrap
+             %chem-struct-wrap-atts;                                 >
+
+
+<!--                    CHEMICAL STRUCTURE ELEMENTS                -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Chemical Structure
+                        <chem-struct>                              -->
+<!ENTITY % chem-struct-elements
+                        "| %access.class; | %address-link.class; |
+                         %break.class; |
+                         %emphasis.class; | %label.class; |
+                         %list.class; | %math.class; |
+                         %phrase-content.class; |
+                         %simple-display.class; |
+                         %simple-link.class; | %subsup.class; "      >
+
+
+<!--                    CHEMICAL STRUCTURE MODEL                   -->
+<!--                    A chemical expression, reaction, equation,
+                        etc. that is set apart within the text
+                                                                   -->
+<!ENTITY % chem-struct-model
+                        "(#PCDATA %chem-struct-elements;)* "         >
+
+
+<!--                    CHEMICAL STRUCTURE (DISPLAY)               -->
+<!--                    A chemical expression, reaction, equation,
+                        etc. that is set apart within the text.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=chem-struct
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=chem-struct
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=chem-struct
+                                                                   -->
+<!ELEMENT  chem-struct  %chem-struct-model;                          >
+<!ATTLIST  chem-struct
+             %chem-struct-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    FIGURE ELEMENTS                            -->
+<!-- ============================================================= -->
+
+
+<!--                    FIGURE GROUP MODEL                         -->
+<!--                    Content model for a Figure Group element   -->
+<!ENTITY % fig-group-model
+                        "((%id.class;)*, (%label.class;)*, 
+                          (%caption.class;)*, (%abstract.class;)*, 
+                          (%kwd-group.class;)*, (%subj-group.class;)*, 
+                          (%access.class; | %address-link.class;)*,
+                          (%fig-display.class; | %xref.class; | 
+                           %just-base-display.class;)* )"            >
+
+
+<!--                    FIGURE GROUP                               -->
+<!--                    Used for a group of figures that must be
+                        displayed together
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fig-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fig-group
+                                                                   -->
+<!ELEMENT  fig-group    %fig-group-model;                            >
+<!ATTLIST  fig-group
+             %fig-group-atts;                                        >
+
+
+<!--                    FIGURE                                     -->
+<!--                    A block of graphic or textual material that
+                        is identified as a "Figure", usually with
+                        a caption and a label such as "Figure" or
+                        "Figure 3.".The content of a Figure need not
+                        be graphical in nature,.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fig
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fig
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=fig
+                                                                   -->
+<!ELEMENT  fig          %fig-model;                                  >
+<!ATTLIST  fig
+             %fig-atts;                                              >
+
+
+<!--                    CAPTION BODY PARTS                         -->
+<!--                    Elements that may be included in the body of
+                        the <caption> element                      -->
+<!ENTITY % caption-body-parts
+                        "(%just-para.class;)*"                       >
+
+
+<!--                    CAPTION MODEL                              -->
+<!--                    Content model for the <caption> element    -->
+<!ENTITY % caption-model
+                        "(title?, %caption-body-parts;)"             >
+
+
+<!--                    CAPTION OF A FIGURE, TABLE, ETC.           -->
+<!--                    Wrapper element for the textual description
+                        associated with a figure, table, etc. In
+                        some source document captions, the first
+                        sentence is set off from the rest as a title.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=caption
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=caption
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=caption
+                                                                   -->
+<!ELEMENT  caption      %caption-model;                              >
+<!ATTLIST  caption
+             %caption-atts;                                          >
+
+
+<!--ELEM  title        Defined in %common.ent;                     -->
+<!--ELEM  p            Defined in %common.ent;                     -->
+
+
+<!-- ============================================================= -->
+<!--                    THE GRAPHIC AND MEDIA OBJECT ELEMENTS      -->
+<!-- ============================================================= -->
+
+
+<!--                    GRAPHIC MODEL                              -->
+<!--                    Content model for the <graphic> element    -->
+<!ENTITY % graphic-model
+                        "(%access.class; | %abstract.class; | 
+                          %address-link.class; | %caption.class; | 
+                          %display-back-matter.class; | 
+                          %id.class; | %label.class; |
+                          %kwd-group.class; | %subj-group.class; |
+                          %xref.class;)* "                           >
+
+<!--                    GRAPHIC                                    -->
+<!--                    An external file that holds a picture,
+                        illustration, etc., usually as some form of
+                        binary object. The "content" of the <graphic>
+                        element is not the object, but merely
+                        information about the object. The "href"
+                        attribute points to the file containing
+                        the object.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=graphic
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=graphic
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=graphic
+                                                                   -->
+<!ELEMENT  graphic      %graphic-model;                              >
+<!ATTLIST  graphic
+             %graphic-atts;                                          >
+
+
+<!--                    INLINE MEDIA MODEL                         -->
+<!--                    Content model for the <inline-media> element
+                                                                   -->
+<!ENTITY % inline-media-elements  
+                        "| %access.class; | %address-link.class; |
+                         %emphasis.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    INLINE MEDIA OBJECT                        -->
+<!--                    An external file that holds a media object
+                        to be used inline, such as a pronunciation
+                        file. "content" of the <media> element is not 
+                        the object, but merely information about the
+                        object or the word to be linked. The "href" 
+                        attribute points to the file containing the 
+                        object.
+                        Details at:                      http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=inline-media
+                      http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=inline-media
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=inline-media
+                                                                   -->
+<!ELEMENT  inline-media (#PCDATA %inline-media-elements;)*           >
+<!ATTLIST  inline-media
+             %inline-media-atts;                                     >
+
+
+<!--                    MEDIA MODEL                                -->
+<!--                    Content model for the <media> element      -->
+<!ENTITY % media-model  "(%access.class; | %abstract.class; | 
+                          %address-link.class; | %caption.class; |
+                          %display-back-matter.class; | 
+                          %id.class; |  %label.class; | 
+                          %kwd-group.class; | %subj-group.class; |                        
+                          %xref.class;)* "            >
+
+
+<!--                    MEDIA OBJECT                               -->
+<!--                    An external file that holds a media object,
+                        such as an animation or a movie. The
+                        "content" of the <media> element is not the
+                        object, but merely information about the
+                        object. The "href" attribute points to the
+                        file containing the object.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=media
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=media
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=media
+                                                                   -->
+<!ELEMENT  media        %media-model;                                >
+<!ATTLIST  media
+             %media-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    INLINE GRAPHIC                             -->
+<!-- ============================================================= -->
+
+
+<!--                    INLINE GRAPHIC MODEL                       -->
+<!--                    Content model for the <inline-graphic>
+                        element                                    -->
+<!ENTITY % inline-graphic-model
+                        "((%access.class;)*)"                        >
+
+
+<!--                    INLINE GRAPHIC                             -->
+<!--                    A small graphic such as an icon or a small
+                        picture symbol that is displayed or set
+                        in the same line as the text.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=inline-graphic
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=inline-graphic
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=inline-graphic
+                                                                   -->
+<!ELEMENT  inline-graphic
+                        %inline-graphic-model;                       >
+<!ATTLIST  inline-graphic
+             %inline-graphic-atts;                                   >
+
+
+<!-- ============================================================= -->
+<!--                    PRESERVE THE WHITESPACE TEXT               -->
+<!-- ============================================================= -->
+
+
+<!--                    PREFORMATTED TEXT ELEMENTS                 -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the content model for the
+                        <preformat> element                        -->
+<!ENTITY % preformat-elements
+                        "| %access.class; | %address-link.class; |
+                         %display-back-matter.class; |
+                         %emphasis.class; | %id.class; |
+                         %phrase.class; | %subsup.class;"            >
+
+
+<!--                    PREFORMAT MODEL                            -->
+<!--                    Content model for the <preformat> element  -->
+<!ENTITY % preformat-model
+                        "(#PCDATA %preformat-elements;)*"            >
+
+
+<!--                    PREFORMATTED TEXT                          -->
+<!--                    Used for preformatted text such as
+                        computer code in which whitespace, such as
+                        tabs, line feeds, and spaces, should be
+                        preserved.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=preformat
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=preformat
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=preformat
+                                                                   -->
+<!ELEMENT  preformat    %preformat-model;                            >
+<!ATTLIST  preformat
+             %preformat-atts;                                        >
+
+
+<!--                    CODE ELEMENTS                              -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the content model for the
+                        <code> element                             -->
+<!ENTITY % code-elements
+                        "| %address-link.class; |  %emphasis.class; | 
+                         %inline-display-noalt.class; | 
+                         %phrase.class; |  %simple-link.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    CODE TEXT                                  -->
+<!--                    A container element for technical content
+                        such as programming language code, 
+                        pseudo-code, schemas, or a markup fragment.
+                          This material may be preformatted text, with
+                        or without emphasis, or it may be an external
+                        link to a binary executable file.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=code
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=code
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=code
+                                                                   -->
+<!ELEMENT  code         (#PCDATA %code-elements;)*                   >
+<!ATTLIST  code
+             %code-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    SUPPLEMENTARY MATERIAL                     -->
+<!-- ============================================================= -->
+
+
+<!--                    SUPPLEMENTARY MATERIAL MODEL               -->
+<!--                    Content model for the
+                        <supplementary-material> element           -->
+<!ENTITY % supplementary-material-model
+                        "%fig-model;"                                >
+
+
+<!--                    SUPPLEMENTARY MATERIAL                     -->
+<!--                    Additional data files that contain
+                        information directly supportive of the item,
+                        for example, an audio clip, movie, database,
+                        spreadsheet, applet, or other external file.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=supplementary-material
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=supplementary-material
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=supplementary-material
+                                                                   -->
+<!ELEMENT  supplementary-material
+                        %supplementary-material-model;               >
+<!ATTLIST  supplementary-material
+             %supplementary-material-atts;                           >
+
+
+<!-- ============================================================= -->
+<!--                    TABLE ELEMENTS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    TABLE WRAPPER GROUP MODEL                  -->
+<!--                    Content model for the <table-wrap-group>
+                        element                                    -->
+<!ENTITY % table-wrap-group-model
+                        "((%id.class;)*, (%label.class;)*, 
+                          (%caption.class;)*, (%abstract.class;)*, 
+                          (%kwd-group.class;)*, (%subj-group.class;)*, 
+                          (%access.class; | %address-link.class;)*,
+                          (%just-table.class; | %xref.class;)+ )"    >
+
+
+<!--                    TABLE WRAPPER GROUP                        -->
+<!--                    Used as a wrapper tag to contain a group of
+                        tables that must be displayed together
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=table-wrap-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=table-wrap-group
+                                                                   -->
+<!ELEMENT  table-wrap-group
+                        %table-wrap-group-model;                     >
+<!ATTLIST  table-wrap-group
+             %table-wrap-group-atts;                                 >
+
+
+<!--                    TABLE WRAPPER CONTENT MODEL                -->
+<!--                    Content model for the container element that
+                        surrounds the standard table models for row
+                        and columns.                               -->
+<!ENTITY % table-wrap-model
+                        "((%id.class;)*, 
+                          (%label.class;)*, (%caption.class;)*,
+                          (%abstract.class;)*, (%kwd-group.class;)*, 
+                          (%subj-group.class;)*, 
+                          (%access.class; | %address-link.class;)*,
+                          (%inside-table-wrap;)*,
+                          (%table-foot.class; |
+                           %display-back-matter.class;)* )"          >
+
+
+<!--                    TABLE WRAPPER                              -->
+<!--                    Used to hold a complete table, that is, not
+                        only the rows and columns that make up a
+                        table, but also the table captions, list
+                        of table footnotes, alternative descriptions
+                        for accessibility, etc.  Within the Table
+                        Wrapper element, the row and column tags that
+                        describe the table cells are defined by one
+                        of the popular "standard" table models, for
+                        example the XHTML table model, OASIS Exchange
+                        (CALS) table model, or the Elsevier Science
+                        Full Length Article table body <tblbody>
+                        model, et al.)
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=table-wrap
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=table-wrap
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=table-wrap
+                                                                   -->
+<!ELEMENT  table-wrap   %table-wrap-model;                           >
+<!ATTLIST  table-wrap
+             %table-wrap-atts;                                       >
+
+
+<!--                    TABLE WRAP FOOTER MODEL                    -->
+<!--                    Content model for the <table-wrap-foot>
+                        element                                    -->
+<!ENTITY % table-wrap-foot-model
+                        "(title?,
+                          (%just-para.class; |  %fn-group.class; |
+                           %fn-link.class; |
+                           %display-back-matter.class;)+ )"          >
+
+
+<!--                    TABLE WRAP FOOTER                          -->
+<!--                    Wrapper element to hold a group of footnotes
+                        or other notes or general paragraphs at the
+                        end of a table.  Not the same as the
+                        Table Foot <tfoot>, which contains rows
+                        and columns like the rest of the table.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=table-wrap-foot
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=table-wrap-foot
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=table-wrap-foot
+                                                                   -->
+<!ELEMENT  table-wrap-foot
+                        %table-wrap-foot-model;                      >
+<!ATTLIST  table-wrap-foot
+             %table-wrap-foot-atts;                                  >
+
+
+<!-- ================== End Display Class Module ================= -->
\ No newline at end of file
diff --git a/dtd/JATS-format1-3.ent b/dtd/JATS-format1-3.ent
new file mode 100644
index 0000000..f771aef
--- /dev/null
+++ b/dtd/JATS-format1-3.ent
@@ -0,0 +1,997 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Formatting Element Classes                        -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+ "-//NLM//DTD JATS (Z39.96) JATS DTD Suite Formatting Element Classes v1.3 20210610//EN"
+  Delivered as file "JATS-format1-3.ent"                           -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Elements concerned with rendition of output, for  -->
+<!--             example printing on a page or display on a screen -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 22. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 21. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 20. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 19. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 18. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 17. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 16. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+     
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 15. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 14. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 13. JATS became version "1.1d3" and "v1.1 20150301//EN"
+ 
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  12. RUBY MODEL CHANGED TO MATCH HTML5
+      - changed the Ruby content model to allow only a single
+        Ruby annotation on a single Ruby base:
+            (rb, rt+)
+        The Ruby textual annotation may NOT take a pair of
+        Ruby parentheses. This is a simplification of the
+        HTML5 model:
+           (rb, (rt | (rp, rt, rp)) )
+        The simplification does not allow Ruby parenthesis.
+        Archiving and BITS both use the full model above.
+
+  11. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 10. RUBY ANNOTATIONS - Added new elements for:
+      - <ruby> The Ruby wrapper element, which contains the base
+          text and the annotation.
+      - <rb> Ruby Base text, acts in the same manner as face markup,
+        surrounding some text in the narrative.
+      - <rt> Ruby Text, the annotation that modifies a piece of
+         the narrative text, frequently typeset above the text.
+
+  9. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added a new attribute list to:
+      - break 
+      - hr      
+      - rp               
+
+  8. ADDED NEW ELEMENT <fixed-case> 
+     - defined as meaning that the case of the content is not to
+       change, even if the content around it is styled to all
+       upper case or all lower. For example "PhD".
+
+  7. ADDED NEW ATTRIBUTE - @toggle added to:
+     - bold, italic (default="yes"), monospace, overline, 
+       roman (default="no"), sans-serif, sc, strike, and underline.
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+  
+  6. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  5. Updated the DTD-version attribute to "0.4" 
+   
+  4. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+  3. @SPECIAL-USE - Added the attribute @special-use to the
+     all 14 formatting (emphasis) elements. This includes all the
+     ones listed in 2. below as well as:
+       - sub             sub-atts  
+       - sup             sup-atts
+       - overline        overline-atts
+       - overline-start  overline-start-atts
+       - overline-end    overline-end-atts
+       - underline       underline-atts
+       - underline-start underline-start-atts
+       - underline-end   underline-end-atts
+
+  2. PEs FOR ATTLISTS - Added parameter entity redefinitions for the
+     attribute lists of the following elements: (no attributes or
+     values were changed)
+       - bold            bold-atts       NEW PE
+       - italic          italic-atts     NEW PE
+       - monospace       monospace-atts  NEW PE
+       - roman           roman-atts      NEW PE
+       - sans-serif      sans-serif-atts NEW PE
+       - sc              sc-atts         NEW PE
+       - strike          strike-atts     NEW PE
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    BOLD ATTRIBUTES                            -->
+<!--                    Attributes for the <bold> element          -->
+<!ENTITY % bold-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    BREAK ATTRIBUTES                           -->
+<!--                    Attributes for the <break> element         -->
+<!ENTITY % break-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    FIXED CASE ATTRIBUTES                      -->
+<!--                    Attributes for the <fixed-case> element    -->
+<!ENTITY % fixed-case-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    HORIZONTAL RULE ATTRIBUTES                 -->
+<!--                    Attributes for the <hr> element            -->
+<!ENTITY % hr-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    ITALIC ATTRIBUTES                          -->
+<!--                    Attributes for the <italic> element        -->
+<!ENTITY % italic-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        'yes'
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    MONOSPACE ATTRIBUTES                       -->
+<!--                    Attributes for the <bold> element          -->
+<!ENTITY % monospace-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    OVERLINE START ATTRIBUTES                  -->
+<!--                    Attributes for the <overline> element      -->
+<!ENTITY % overline-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    OVERLINE START ATTRIBUTES                  -->
+<!--                    Attributes for the <overline-start> element-->
+<!ENTITY % overline-start-atts
+            "%jats-common-atts-id-required;                                       
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    OVERLINE END ATTRIBUTES                    -->
+<!--                    Attributes for the <overline-end> element  -->
+<!ENTITY % overline-end-atts
+            "%jats-common-atts;                                       
+             rid        IDREF                             #REQUIRED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ROMAN ATTRIBUTES                           -->
+<!--                    Attributes for the <roman> element         -->
+<!ENTITY % roman-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        'no'
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    RUBY BASE ATTRIBUTES                       -->
+<!--                    Attributes for the <rb> element            -->
+<!ENTITY % rb-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    RUBY PARENTHESIS ATTRIBUTES                -->
+<!--                    Attributes for the <rp> element            -->
+<!ENTITY % rp-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    RUBY TEXTUAL ANNOTATION ATTRIBUTES         -->
+<!--                    Attributes for the <rt> element            -->
+<!ENTITY % rt-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    RUBY ATTRIBUTES                            -->
+<!--                    Attributes for the <ruby> element          -->
+<!ENTITY % ruby-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SANS SERIF ATTRIBUTES                      -->
+<!--                    Attributes for the <sans-serif> element    -->
+<!ENTITY % sans-serif-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SMALL CAPS ATTRIBUTES                      -->
+<!--                    Attributes for the <sc> element            -->
+<!ENTITY % sc-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    STRIKE THROUGH ATTRIBUTES                  -->
+<!--                    Attributes for the <strike> element        -->
+<!ENTITY % strike-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SUBSCRIPT ATTRIBUTES                       -->
+<!--                    Attributes for the subscript <sub> element -->
+<!ENTITY % sub-atts
+            "%jats-common-atts;                                       
+             arrange    (stack | stagger)                 #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    SUPERSCRIPT ATTRIBUTES                     -->
+<!--                    Attributes for the superscript <sup>
+                        element                                    -->
+<!ENTITY % sup-atts
+            "%jats-common-atts;                                       
+             arrange    (stack | stagger)                 #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    UNDERLINE ATTRIBUTES                       -->
+<!--                    Attributes for the <underline> element     -->
+<!ENTITY % underline-atts
+            "%jats-common-atts;                                       
+             toggle     (yes | no)                        #IMPLIED
+             underline-style
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    UNDERLINE START ATTRIBUTES                 -->
+<!--                    Attributes for the <underline-start>
+                        element                                    -->
+<!ENTITY % underline-start-atts
+            "%jats-common-atts-id-required;                                       
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    UNDERLINE END ATTRIBUTES                   -->
+<!--                    Attributes for the <underline-end> element -->
+<!ENTITY % underline-end-atts
+            "%jats-common-atts;                                       
+             rid        IDREF                             #REQUIRED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    APPEARANCE CLASS ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!--                    HORIZONTAL RULE                            -->
+<!--                    Defined to allow the user to specify an
+                        explicit (non machine-generated) rule.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=hr
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=hr
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=hr
+                                                                   -->
+<!ELEMENT  hr           EMPTY                                        >
+<!ATTLIST  hr 
+             %hr-atts;                                               >
+
+
+<!-- ============================================================= -->
+<!--                    BREAK CLASS ELEMENTS                       -->
+<!-- ============================================================= -->
+
+
+<!--                    LINE BREAK                                 -->
+<!--                    Defined to allow the user to specify an
+                        explicit (non machine-generated) line break.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=break
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=break
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=break
+                                                                   -->
+<!ELEMENT  break        EMPTY                                        >
+<!ATTLIST  break
+             %break-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    EMPHASIS/RENDITION CLASS ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    BOLD                                       -->
+<!--                    Used to mark text that should appear in bold
+                        face type for print or display
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=bold
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=bold
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=bold
+                                                                   -->
+<!ELEMENT  bold         (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  bold
+             %bold-atts;                                             >
+
+
+<!--                    FIXED CASE                                 -->
+<!--                    Used to mark text in which the case of the 
+                        content should not be changed, even if the 
+                        content around it is styled to all
+                        upper case or all lower. For example "PhD".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fixed-case
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fixed-case
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=fixed-case
+                                                                   -->
+<!ELEMENT  fixed-case   (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  fixed-case
+             %fixed-case-atts;                                       >
+
+
+<!--                    ITALIC                                     -->
+<!--                    Used to mark text that should appear in
+                        italic type on output.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=italic
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=italic
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=italic
+                                                                   -->
+<!ELEMENT  italic       (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  italic
+             %italic-atts;                                           >
+
+
+<!--                    MONOSPACE TEXT (TYPEWRITER TEXT)           -->
+<!--                    Used to mark text that should appear in
+                        a non-proportional font, such as courier
+                        for display or print.  This is common for
+                        computer code examples, man-machine
+                        dialogues, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=monospace
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=monospace
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=monospace
+                                                                   -->
+<!ELEMENT  monospace    (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  monospace
+             %monospace-atts;                                        >
+
+
+<!--                    ROMAN                                      -->
+<!--                    Used to mark text that should remain in
+                        roman script no matter what style the
+                        surrounding text takes on.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=roman
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=roman
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=roman
+                                                                   -->
+<!ELEMENT  roman        (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  roman
+             %roman-atts;                                            >
+
+
+
+<!--                    SANS SERIF                                 -->
+<!--                    Used to mark text that should appear in a
+                        special sans-serif font, typically used in
+                        math or chemistry
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sans-serif
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sans-serif
+                                                                   -->
+<!ELEMENT  sans-serif   (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  sans-serif
+             %sans-serif-atts;                                       >
+
+
+<!--                    SMALL CAPS                                 -->
+<!--                    Used to mark text that should appear in a
+                        font which creates smaller capital letters
+                        on output.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sc
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sc
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=sc
+                                                                   -->
+<!ELEMENT  sc           (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  sc
+             %sc-atts;                                               >
+
+
+<!--                    OVERLINE                                   -->
+<!--                    Used to mark text that should appear with a
+                        horizontal line above each character in
+                        display or print. There is no PE for
+                        override because this was added to handle
+                        a specific publisher tag set and should not
+                        grow beyond what they need.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=overline
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=overline
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=overline
+                                                                   -->
+<!ELEMENT  overline     (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  overline
+             %overline-atts;                                         >
+
+
+<!--                    STRIKE THROUGH                             -->
+<!--                    Used to mark text that should appear with
+                        a line through it so as to appear "struck out"
+                        on display or print
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=strike
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=strike
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=strike
+                                                                   -->
+<!ELEMENT  strike       (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  strike
+             %strike-atts;                                           >
+
+
+<!--                    SUBSCRIPT                                  -->
+<!--                    A number or expression that is set lower
+                        than the baseline and slightly smaller,
+                        to act as an inferior or subscript
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sub
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sub
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=sub
+                                                                   -->
+<!ELEMENT  sub          (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  sub
+             %sub-atts;                                              >
+
+
+<!--                    SUPERSCRIPT                                -->
+<!--                    A number or expression that is set higher
+                        than the baseline and slightly smaller,
+                        to act as a superior or superscript
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sup
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sup
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=sup
+                                                                   -->
+<!ELEMENT  sup          (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  sup
+             %sup-atts;                                              >
+
+
+<!--                    UNDERLINE                                  -->
+<!--                    Used to mark text that should appear with a
+                        horizontal line below each character in
+                        display or print.
+                        Details at:
+                         http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=underline
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=underline
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=underline
+                                                                   -->
+<!ELEMENT  underline    (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  underline
+             %underline-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    ADVANCED UNDERLINE AND OVERLINE ELEMENTS
+                        (From the Elsevier DTD, used mostly within
+                        mathematics, when ordinary MathML underline
+                        and overline functions are inadequate. The
+                        elements act as milestone tags marking the
+                        start and end of over or underlining that
+                        may extend across element boundaries.)     -->
+<!-- ============================================================= -->
+
+
+<!--                    OVERLINE START                             -->
+<!--                    The start of a milestone-created overline, the
+                        end of ornament will be marked by an
+                        Overline End element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=overline-start
+                                                                   -->
+<!ELEMENT  overline-start
+                        EMPTY                                        >
+<!ATTLIST  overline-start
+             %overline-start-atts;                                   >
+
+
+<!--                    OVERLINE END                               -->
+<!--                    The end of a milestone-created overline, the
+                        start of ornament will be marked by an
+                        Overline Start element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=overline-end
+                                                                   -->
+<!ELEMENT  overline-end EMPTY                                        >
+<!ATTLIST  overline-end
+             %overline-end-atts;                                     >
+
+
+<!--                    UNDERLINE START                            -->
+<!--                    The start of a milestone-created underline,
+                        the end of ornament will be marked by an
+                        Underline End element
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=underline-start
+                                                                   -->
+<!ELEMENT  underline-start
+                        EMPTY                                        >
+<!ATTLIST  underline-start
+             %underline-start-atts;                                  >
+
+
+<!--                    UNDERLINE END                              -->
+<!--                    The end of a milestone-created underline, the
+                        start of ornament will be marked by an
+                        Underline Start element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=underline-end
+                                                                   -->
+<!ELEMENT  underline-end
+                        EMPTY                                        >
+<!ATTLIST  underline-end
+             %underline-end-atts;                                    >
+
+
+<!-- ============================================================= -->
+<!--                    RUBY MARKUP                                -->
+<!-- ============================================================= -->
+
+
+<!--                    RUBY WRAPPER Model                         -->
+<!--                    Content model for the <ruby> element       -->
+<!ENTITY % ruby-model   "(rb, rt)"                                   >
+
+
+<!--                    RUBY WRAPPER                               -->
+<!--                    A Ruby textual annotation is an annotation,
+                        typically short, applied to a letter, word,
+                        phrase, or name that appears in the narrative
+                        text. Ruby annotations can indicate,
+                        for example, pronunciation advice, notes for 
+                        translation, semantic annotations, et al.
+                          The <ruby> element is an inline wrapper  
+                        element that contains some of the document 
+                        narrative text (inside a Ruby Base <rb> 
+                        element) and one or more Ruby textual 
+                        annotations (inside <rt> elements) that are
+                        associated with the base text.
+                          In display or print, the characters of the
+                        Ruby annotation are frequently placed above 
+                        the characters they modify, in parenthesis 
+                        after the characters they modify, or to the
+                        right of vertically set text.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ruby
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ruby
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ruby
+                                                                   -->
+<!ELEMENT  ruby         %ruby-model;                                 >
+<!ATTLIST  ruby
+             %ruby-atts;                                             >
+
+
+<!--                    RUBY BASE ELEMENTS                         -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Ruby Base <rb>.        -->
+<!ENTITY % rb-elements  "| %face-markup.class;"                      >
+
+
+<!--                    RUBY BASE                                  -->
+<!--                    The <rb> element is one half of a Ruby 
+                        Annotation <ruby>, and it contains the 
+                        narrative text to which a Ruby textual 
+                        annotation <rt> should be applied.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=rb
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=rb
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=rb
+                                                                   -->
+<!ELEMENT  rb           (#PCDATA %rb-elements;)*                     >
+<!ATTLIST  rb
+             %rb-atts;                                               >
+
+
+<!--                    RUBY TEXTUAL ANNOTATION ELEMENTS           -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Ruby Textual Annotation
+                        <rt>.                                      -->
+<!ENTITY % rt-elements  ""                                           >
+
+
+<!--                    RUBY TEXTUAL ANNOTATION                    -->
+<!--                    The <rt> element is one half of a Ruby 
+                        Annotation <ruby>, and it contains the 
+                        Ruby textual annotation that is applied to
+                        the Ruby Base text <rb>.
+                        Details at:
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=rt
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=rt
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=rt
+                                                                   -->
+<!ELEMENT  rt           (#PCDATA %rt-elements;)*                     >
+<!ATTLIST  rt
+             %rt-atts;                                               >
+
+
+
+<!--                    RUBY PARENTHESIS                           -->
+<!--                    The <rp> element is an optional element used
+                        to provide spacing and a parenthesis to 
+                        surround Ruby Text <rt>, for older systems 
+                        that do not handle Ruby properly.
+                        Remarks. This optional element never holds
+                        any text except a space, an open 
+                        parenthesis, or a close parenthesis:
+                          <ruby><rb>text</rb>
+                          <rp> (</rp><rt>annotation</rt><rp>) </rp>
+                          </ruby>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=rp
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=rp
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=rp
+                                                                   -->
+<!ELEMENT  rp           (#PCDATA)                                    >
+<!ATTLIST  rp
+             %rp-atts;                                               >
+
+
+<!-- ================== End Format Class Module ================== -->
diff --git a/dtd/JATS-funding1-3.ent b/dtd/JATS-funding1-3.ent
new file mode 100644
index 0000000..8e2bb53
--- /dev/null
+++ b/dtd/JATS-funding1-3.ent
@@ -0,0 +1,1100 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Funding Elements                                  -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Funding Elements v1.3 20210610//EN"
+     Delivered as file "JATS-funding1-3.ent"                       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the elements which describe funding for   -->
+<!--             the research reported in a work or the open       -->
+<!--             access funding for the work                       -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             February 2008                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Publishing DTD is built from the      -->
+<!--             Archiving and Interchange DTD Suite.              -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 27. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+ 26. AWARD GROUP - Added two new optional, non-repeatable elements:
+     <award-name> and <award-desc>, inside the model of
+     <award-group>.
+
+ 25. AWARD ID - Added new attribute, @award-id-type
+ 
+ 24. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 23. ASSIGNING AUTHORITY - Added @assigning-authority to the
+     following elements, so that the type-of-identifier and
+     the party-responsible-for-identifier could both be
+     recorded. 
+        - <resource-id>
+  
+ 22. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 21. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 20. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 19. NON-MONETARY SUPPORT - Previous support descriptions in JATS
+     used the <funding-group> element, which could only be used to
+     describe monetary support for the research described in the
+     article.
+       Added new element <contributed-resource-group> to hold 
+     descriptions of non-monetary support (such as data, facilities, 
+     or any in-kind support) for the research described in the
+     article.
+     
+     This changed the JATS models in several ways:
+      - Inside <article-meta>, added a new element <support-group>
+        to hold both <funding-group> and <contributed-resource-group>.
+        For backwards compatibility, <support-group> is a 
+        peer to <funding-group> inside <article-meta>, and (as the 
+        path going forward) <support-group> also contains 
+        <funding-group> as a child.
+      - New elements inside <contributed-resource-group> (as its 
+        children or descendants) include:
+          - support-description
+          - resource-group
+          - resource-name
+          - resource-wrap
+          - resource-id
+      - Inside <award-group>, added a new element <support-source>
+        to describe the source of a non-monetary award. The
+        element <support-source> is as an alternative to 
+        <funding-source> (which describes the source of a monetary
+        award).  
+         
+ 18. AWARD ID ATTRIBUTES - Made the award-id attributes match 
+     Green and BITS, adding @award-type and the might link
+     attributes.
+ 
+ 17. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 16. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 15. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 14. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+      =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 13. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  12. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 11. INSTITUTION WRAP ADDED
+     Added the elements <institution-wrap> to the following elements
+     through the institution-wrap.class:
+      - funding-source
+
+ 10. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  9. PRINCIPAL-AWARD-RECIPIENT MODEL - Added "contrib-id.class" to 
+     the <principal-award-recipient> through 
+     principal-award-recipient-elements, to hold identifiers for 
+     people, such as publishers-specific IDs, ORCIDs, etc..
+
+  8. PRINCIPAL INVESTIGATOR MODEL - Added "contrib-id.class" to 
+     the <principal-investigator> through 
+     principal-investigator-elements, to hold identifiers for 
+     people, such as publishers-specific IDs, ORCIDs, etc..
+   
+  7. Updated the public identifier to "v1.0 20120330//EN", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "1".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  6. Updated the DTD-version attribute to "0.4" 
+   
+  5. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+           http://jats.nlm.nih.gov/0.4.
+
+  4. FUNDING GROUP- Allowed <open-access> to repeat within
+     <funding-group>
+
+  3. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+
+      - award-group through award-group-atts (both)
+      - award-id through award-id-atts (both)
+      - funding-group through funding-group-atts (both) NEW PE
+      - funding-source through funding-source-atts (both)
+      - funding-statement through funding-statement-atts (both)
+      - open-access through open-access-atts (both) NEW PE
+      - principal-award-recipient through
+          principal-award-recipient-atts (both) NEW PE
+      - principal-investigator through principal-investigator-atts
+          (both) NEW PE
+
+  2. OPEN ACCESS MODEL - Changed the model from
+         "(p+)"
+     to
+          "(%just-para.class;+)"
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    AWARD GROUP ATTRIBUTES                     -->
+<!--                    Attributes for the <award-group> element   -->
+<!ENTITY % award-group-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             award-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    AWARD IDENTIFIER ATTRIBUTES                -->
+<!--                    Attributes for the <award-id> element      -->
+<!ENTITY % award-id-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             award-type
+                        CDATA                             #IMPLIED
+             award-id-type
+                        CDATA                             #IMPLIED                             assigning-authority
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+ 
+
+<!--                    AWARD NAME ATTRIBUTES                      -->
+<!--                    Attributes for the <award-name> element    -->
+<!ENTITY % award-name-atts
+            "%jats-common-atts;                                       
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+ 
+
+<!--                    AWARD DESCRIPTION ATTRIBUTES               -->
+<!--                    Attributes for the <award-desc> element    -->
+<!ENTITY % award-desc-atts
+            "%jats-common-atts;                                       
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+ 
+
+
+<!--                    CONTRIBUTED RESOURCE GROUP ATTRIBUTES      -->
+<!--                    Attributes for the 
+                        <contributed-resource-group> element       -->
+<!ENTITY % contributed-resource-group-atts
+            "%jats-common-atts;
+             resource-type
+                        CDATA                             #IMPLIED                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    FUNDING GROUP ATTRIBUTES                   -->
+<!--                    Attributes for the <funding-group>
+                        element                                    -->
+<!ENTITY % funding-group-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    FUNDING SOURCE ATTRIBUTES                  -->
+<!--                    Attributes for the <funding-source> element-->
+<!ENTITY % funding-source-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             source-type
+                        CDATA                             #IMPLIED
+             country    CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    FUNDING STATEMENT ATTRIBUTES               -->
+<!--                    Attributes for the <funding-statement>
+                        element                                    -->
+<!ENTITY % funding-statement-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    OPEN ACCESS ATTRIBUTES                     -->
+<!--                    Attributes for the <open-access>
+                        element                                    -->
+<!ENTITY % open-access-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PRINCIPAL AWARD RECIPIENT ATTRIBUTES       -->
+<!--                    Attributes for the <principal-award-recipient>
+                        element                                    -->
+<!ENTITY % principal-award-recipient-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PRINCIPAL INVESTIGATOR ATTRIBUTES          -->
+<!--                    Attributes for the <principal-investigator>
+                        element                                    -->
+<!ENTITY % principal-investigator-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    RESOURCE GROUP ATTRIBUTES                  -->
+<!--                    Attributes for the <resource-group>
+                        element                                    -->
+<!ENTITY % resource-group-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+
+<!--                    RESOURCE WRAPPER ATTRIBUTES                -->
+<!--                    Attributes for the <institution-wrap>
+                        element                                    -->
+<!ENTITY % resource-wrap-atts
+            "%jats-common-atts;"                                     >                                        
+
+
+<!--                    RESOURCE IDENTIFIER ATTRIBUTES             -->
+<!--                    Attribute list for <resource-id>           -->
+<!ENTITY % resource-id-atts
+            "%jats-common-atts;                                        
+             resource-id-type
+                        CDATA                             #IMPLIED
+             assigning-authority
+                        CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    RESOURCE NAME ATTRIBUTES                   -->
+<!--                    Attribute list for <resource-name>         -->
+<!ENTITY % resource-name-atts
+            "%jats-common-atts;
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    SUPPORT DESCRIPTION ATTRIBUTES             -->
+<!--                    Attributes for the <support-description>
+                        element                                    -->
+<!ENTITY % support-description-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SUPPORT GROUP ATTRIBUTES                   -->
+<!--                    Attributes for the <support-group>
+                        element                                    -->
+<!ENTITY % support-group-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SUPPORT SOURCE ATTRIBUTES                  -->
+<!--                    Attributes for the <support-source> element-->
+<!ENTITY % support-source-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             support-type
+                        CDATA                             #IMPLIED
+             country    CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!-- ============================================================= -->
+<!--                    FUNDING ELEMENTS                           -->
+<!-- ============================================================= -->
+
+
+<!--                    FUNDING GROUP MODEL                        -->
+<!--                    Model for the <funding-group> element      -->
+<!ENTITY % funding-group-model
+                        "(award-group*, funding-statement*,
+                         open-access*)"                              >
+
+
+<!--                    FUNDING GROUP                              -->
+<!--                    Container element for information concerning
+                        grants, contracts, sponsors, or other
+                        funding for the research reported in the
+                        work (typically an article), as well as for
+                        material on the open access funding for the
+                        work, for example, which model of open access
+                        funding was used or who paid the open access
+                        charges.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=funding-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=funding-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=funding-group
+                                                                   -->
+<!ELEMENT  funding-group
+                        %funding-group-model;                        >
+<!ATTLIST  funding-group
+             %funding-group-atts;                                    >
+
+
+<!--                    FUNDING STATEMENT ELEMENTS                 -->
+<!--                    Elements that may be mixed with text inside  
+                        the <funding-statement> element            -->
+<!ENTITY % funding-statement-elements
+                        "| %address-link.class; | %emphasis.class; |
+                         %phrase-content.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    FUNDING STATEMENT                          -->
+<!--                    A displayable prose statement that describes
+                        the funding for the research on which a work
+                        was based. Such a statement is required, for
+                        example, by research funded in whole or part
+                        by the Wellcome Trust. The statement may
+                        mention (and therefore repeat) the funding
+                        source, PI, or other funding information.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=funding-statement
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=funding-statement
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=funding-statement
+                                                                   -->
+<!ELEMENT  funding-statement
+                        (#PCDATA %funding-statement-elements;)*      >
+<!ATTLIST  funding-statement
+             %funding-statement-atts;                                >
+
+
+<!--                    OPEN ACCESS MODEL                          -->
+<!--                    Model for the <open-access> element        -->
+<!ENTITY % open-access-model
+                        "((%just-para.class;)+)"                     >
+
+
+<!--                    OPEN ACCESS                                -->
+<!--                    A container element to hold metadata
+                        concerning the open access provisions that
+                        apply to a work, for example which model
+                        of charging was used or who paid the open
+                        access charges for a journal article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=open-access
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=open-access
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=open-access
+                                                                   -->
+<!ELEMENT  open-access  %open-access-model;                          >
+<!ATTLIST  open-access
+             %open-access-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    NON-MONETARY SUPPORT ELEMENTS              -->
+<!-- ============================================================= -->
+
+
+<!--                    SUPPORT GROUP MODEL                        -->
+<!--                    Model for the <support-group> element      -->
+<!ENTITY % support-group-model
+                        "(funding-group*, 
+                          contributed-resource-group*)"              >
+
+
+<!--                    SUPPORT GROUP                              -->
+<!--                    Container element for information concerning
+                        both funding and non-monetary support for the 
+                        research reported in the work (typically an 
+                        article). This includes both monetary awards,
+                        grants,investigators, etc. but also facilities
+                        computer resources, data acquisition or 
+                        donation, and other non-monetary support 
+                        (including in-kind support).
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=support-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=support-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=support-group
+                                                                   -->
+<!ELEMENT  support-group
+                        %support-group-model;                        >
+<!ATTLIST  support-group
+             %support-group-atts;                                    >
+
+
+<!--                    CONTRIBUTED RESOURCE GROUP MODEL           -->
+<!--                    Model for the <contributed-resource-group> 
+                        element                                    -->
+<!ENTITY % contributed-resource-group-model
+                        "(award-group*, support-description*, 
+                          resource-group*)"                          >
+
+
+<!--                    CONTRIBUTED RESOURCE GROUP                 -->
+<!--                    Container element for information concerning
+                        non-financial support for the research 
+                        reported in the work (typically an article). 
+                        This may include awards and investigators, 
+                        but also facilities, computer resources, data 
+                        acquisition or donation, and other 
+                        non-monetary support (including in-kind 
+                        support).
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=contributed-resource-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=contributed-resource-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=contributed-resource-group
+                                                                   -->
+<!ELEMENT  contributed-resource-group
+                        %contributed-resource-group-model;           >
+<!ATTLIST  contributed-resource-group
+             %contributed-resource-group-atts;                       >
+
+
+<!--                    SUPPORT DESCRIPTION ELEMENTS               -->
+<!--                    Model for the <support-description> element-->
+<!ENTITY % support-description-model
+                        "(p+)"                                       >
+
+
+<!--                    SUPPORT DESCRIPTION                        -->
+<!--                    A displayable prose statement that describes
+                        the non-financial support given for the 
+                        research on which a work was based. 
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=support-description
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=support-description
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=support-description
+                                                                   -->
+<!ELEMENT  support-description
+                        (%support-description-model;)                >
+<!ATTLIST  support-description
+             %support-description-atts;                              >
+
+
+<!--                    RESOURCE GROUP MODEL                       -->
+<!--                    Model for the <resource-group> element     -->
+<!ENTITY % resource-group-model
+                        "((resource-name | resource-wrap)+)"         >
+
+
+<!--                    RESOURCE GROUP                             -->
+<!--                    Container element to hold the descriptions of
+                        specific resources supplied in the 
+                        non-financial support of the work described 
+                        in this article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=resource-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=resource-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=resource-group
+                                                                   -->
+<!ELEMENT  resource-group
+                        %resource-group-model;                       >
+<!ATTLIST  resource-group
+             %resource-group-atts;                                   >
+
+
+<!--                    RESOURCE WRAP MODEL                        -->
+<!--                    Model for the <resource-wrap> element      -->
+<!ENTITY % resource-wrap-model
+                        "(resource-name, resource-id*)"              >
+
+
+<!--                    RESOURCE WRAP                              -->
+<!--                    A wrapper element to hold together the name 
+                        of an resource (<resource-name>) and one or 
+                        more external identifiers for that resource 
+                        (<resource-id>, for example a Research 
+                        Resource Identifier).
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=resource-wrap
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=resource-wrap
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=resource-wrap
+                                                                   -->
+<!ELEMENT  resource-wrap
+                        %resource-wrap-model;                        >
+<!ATTLIST  resource-wrap
+             %resource-wrap-atts;                                    >
+
+
+<!--                    RESOURCE NAME MODEL                        -->
+<!--                    Elements that may be mixed with text inside  
+                        the <resource-name> element                -->
+<!ENTITY % resource-name-elements
+                        " | %face-markup.class; | %subsup.class;"    >
+
+
+<!--                    RESOURCE NAME                              -->
+<!--                    A displayable name of or description for a 
+                        specific resource provided in support of the 
+                        work described in this article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=resource-name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=resource-name
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=resource-name
+                                                                   -->
+<!ELEMENT  resource-name
+                        (#PCDATA %resource-name-elements;)*          >
+<!ATTLIST  resource-name
+             %resource-name-atts;                                    >
+
+
+<!--                    RESOURCE IDENTIFIER MODEL                  -->
+<!--                    Elements that may be mixed with text inside  
+                        the <resource-id> element                  -->
+<!ENTITY % resource-id-elements
+                        ""                                           >
+
+
+<!--                    RESOURCE IDENTIFIER                        -->
+<!--                    An external, ideally machine-readable, 
+                        identifier such as a Research Resource 
+                        Identifier, for a specific resource provided
+                        in support of the work described in this 
+                        article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=resource-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=resource-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=resource-id
+                                                                   -->
+<!ELEMENT  resource-id
+                        (#PCDATA %resource-id-elements;)*            >
+<!ATTLIST  resource-id
+             %resource-id-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    AWARD GROUP ELEMENTS                       -->
+<!-- ============================================================= -->
+
+
+<!--                    AWARD GROUP MODEL                          -->
+<!--                    Model for the <award-group> element        -->
+<!ENTITY % award-group-model
+                        "((funding-source* | support-source*), 
+                          award-id*, award-name?, award-desc?,
+                          principal-award-recipient*,
+                          principal-investigator*)"                  >
+
+
+<!--                    AWARD GROUP                                -->
+<!--                    Container element for information concerning
+                        one award that sponsored a work or the
+                        research on which the work was based. There
+                        may be more than source of funding, a grant
+                        or contract number, PI, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=award-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=award-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=award-group
+                                                                   -->
+<!ELEMENT  award-group  %award-group-model;                          >
+<!ATTLIST  award-group
+             %award-group-atts;                                      >
+
+
+<!--                    FUNDING SOURCE ELEMENTS                    -->
+<!--                    Elements that may be mixed with text inside  
+                        the <funding-source> element               -->
+<!ENTITY % funding-source-elements
+                        "%simple-text; | %institution-wrap.class;"   >
+
+
+<!--                    FUNDING SOURCE                             -->
+<!--                    Agency or organization (such as a foundation,
+                        corporation, or an educational institution)
+                        that funded the research on which a work was
+                        based, for example, the Wellcome Trust, NIH,
+                        HHS, Princeton University, or Alcoa
+                        sponsoring the research for a journal
+                        article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=funding-source
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=funding-source
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=funding-source
+                                                                   -->
+<!ELEMENT  funding-source
+                        (#PCDATA %funding-source-elements;)*         >
+<!ATTLIST  funding-source
+             %funding-source-atts;                                   >
+
+
+<!--                    AWARD IDENTIFIER ELEMENTS                  -->
+<!--                    Elements that may be mixed with text inside  
+                        the <award-id> element                     -->
+<!ENTITY % award-id-elements
+                        "%simple-text;"                              >
+
+
+<!--                    AWARD IDENTIFIER                           -->
+<!--                    An identifier that has been assigned to the
+                        award, for example, a grant number, a grant
+                        reference number, or a contract number.
+                        [Note, this is a real-world identifier not
+                        an XML ID.] Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=award-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=award-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=award-id
+                                                                   -->
+<!ELEMENT  award-id     (#PCDATA %award-id-elements;)*               >
+<!ATTLIST  award-id
+             %award-id-atts;                                         >
+
+
+<!--                    AWARD NAME ELEMENTS                        -->
+<!--                    Elements that may be mixed with text inside  
+                        the <award-name> element.                  -->
+<!ENTITY % award-name-elements
+                        ""                                           >
+
+<!--                    AWARD NAME                                 -->
+<!--                    Some awards are known by specific names,
+                        many for historical reasons or to honor a
+                        funder, mentor, or researcher. This element
+                        holds the text of such a name, such as;
+                        "Marie Curie Career Integration Grant " or
+                        "Schleswig-Holstein Excellence Chair".
+                        Details at:                                            
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=award-name
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=award-name
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=award-name
+                                                                   -->
+<!ELEMENT  award-name
+                        (#PCDATA %award-name-elements;)*             >
+<!ATTLIST  award-name
+             %award-name-atts;                                       >
+
+
+<!--                    AWARD DESCRIPTION ELEMENTS                 -->
+<!--                    Elements that may be mixed with text inside  
+                        the <award-desc> element.                  -->
+<!ENTITY % award-desc-elements
+                        ""                                           >
+
+<!--                    AWARD DESCRIPTION                          -->
+<!--                    Some text associated with an award ID or
+                        award name, which may express, for example,
+                        the type of award: "Post-doc Fellowship" or
+                        "a research grant for developing innovative 
+                        cancer". An award description is difficult to 
+                        define, except that it is text describing an
+                        award that is not an award identifier, award
+                        name, nor a funding source. This element 
+                        was developed to hold such text. 
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=award-desc
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=award-deac
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=award-desc
+                                                                   -->
+<!ELEMENT  award-desc
+                        (#PCDATA %award-desc-elements;)*             >
+<!ATTLIST  award-desc
+             %award-desc-atts;                                       >
+
+
+<!--                    PRINCIPAL AWARD RECIPIENT ELEMENTS         -->
+<!--                    Elements that may be mixed with text inside  
+                        the <principal-award-recipient> element    -->
+<!ENTITY % principal-award-recipient-elements
+                        " | %contrib-id.class; | 
+                         %recipient-name.class;"                     >
+
+
+<!--                    PRINCIPAL AWARD RECIPIENT                  -->
+<!--                    The institution or individuals to whom the
+                        award was given, for example the principal
+                        grant holder
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=principal-award-recipient
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=principal-award-recipient
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=principal-award-recipient
+                                                                   -->
+<!ELEMENT  principal-award-recipient
+                        (#PCDATA
+                         %principal-award-recipient-elements;)*      >
+<!ATTLIST  principal-award-recipient
+             %principal-award-recipient-atts;                        >
+
+
+<!--                    PRINCIPAL INVESTIGATOR ELEMENTS            -->
+<!--                    Elements that may be mixed with text inside  
+                        the <principal-investigator> element       -->
+<!ENTITY % principal-investigator-elements
+                        " | %contrib-id.class; | 
+                         %investigator-name.class;"                  >
+
+
+<!--                    PRINCIPAL INVESTIGATOR RECIPIENT           -->
+<!--                    Individual responsible for the intellectual
+                        content of the work reported in the article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=principal-investigator
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=principal-investigator
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=principal-investigator
+                                                                   -->
+<!ELEMENT  principal-investigator
+                        (#PCDATA
+                         %principal-investigator-elements;)*         >
+<!ATTLIST  principal-investigator
+             %principal-investigator-atts;                           >
+
+
+
+<!--                    SUPPORT SOURCE ELEMENTS                    -->
+<!--                    Elements that may be mixed with text inside  
+                        the  <support-source> element              -->
+<!ENTITY % support-source-elements
+                        "%simple-text; | %institution-wrap.class;"   >
+
+
+<!--                    SUPPORT SOURCE                             -->
+<!--                    Agency or organization (such as a foundation,
+                        corporation, or an educational institution)
+                        that provided non-monetary support (such as
+                        facilities or data) in support of the
+                        research on which a work was based.
+                        article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=support-source
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=support-source
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=support-source
+                                                                   -->
+<!ELEMENT  support-source
+                        (#PCDATA %support-source-elements;)*         >
+<!ATTLIST  support-source
+             %support-source-atts;                                   >
+
+<!-- ================== End Funding Module ======================= -->
diff --git a/dtd/JATS-journalmeta1-3.ent b/dtd/JATS-journalmeta1-3.ent
new file mode 100644
index 0000000..a3dbcfe
--- /dev/null
+++ b/dtd/JATS-journalmeta1-3.ent
@@ -0,0 +1,593 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Metadata Elements                         -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Journal Metadata Elements v1.3 20210610//EN"
+     Delivered as file "JATS-journalmeta1-3.ent"                   -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements used to describe the journal   -->
+<!--             in which the journal article is published.        -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 21. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 20. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 19. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 18. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 17. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 16. BITS "2.0" and "v2.0 20151225" remain unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 15. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 14. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 13. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 12. JATS became version "1.1d3" and "v1.1d3 20150301"
+  
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  11. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+ 
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 10. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added a new attribute list to:
+      - journal-meta
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  9. JOURNAL METADATA MODEL
+     - Added <issn-l> as an optional element to <journal-meta>
+     - Added contributors and affiliations to journal metadata through
+       contrib-group.class (which resolves to <contrib-group>) and 
+       aff-alternatives.class (which resolves to <aff> or
+       <aff-alternatives>), using the journal-meta-model.
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  8. Updated the DTD-version attribute to "0.4" 
+   
+  7. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  6. I18N - Changed the default for @xml:lang from "en" to
+     #IMPLIED, so that the @xml:lang would inherit properly and
+     not need to be over-ridden in
+      - <abbrev-journal-title> through %abbrev-journal-title-atts;
+      - <journal-title> through %journal-title-atts;
+      - <journal-subtitle> through %journal-subtitle-atts;
+
+  5. JOURNAL METADATA- Added <notes> to repeat within <journal-meta>
+     (through %journal-meta-model; and added @xml:lang and
+     @specific-use to the attributes of <notes> through %notes-atts;
+
+  4. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+      - abbrev-journal-title through abbrev-journal-title-atts
+          (@specific-use-only; @xml:lang already)
+      - journal-title through journal-title-atts
+          (@specific-use-only;
+      - journal-subtitle through journal-subtitle-atts
+          (@specific-use-only)
+
+  3. JOURNAL TITLE ELEMENTS - Removed the dependency which had both
+     <journal-title> and <journal-subtitle> modeled with the same
+     parameter entity %journal-title-elements;. Created new PE for
+     %journal-subtitle-elements; but set it (as the default) to
+     %journal-title-elements; so that no customization would break.
+
+  2. SELF URI - Added <self-uri> to <journal-meta> (directly
+     following <notes>) so that an XML document can point to the
+     journal home page.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  2. Changed default @xml:lang from "EN" from "en" to match latest
+     RFC 4646/W3C/IANA Subtag Registry recommendations
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE LISTS               -->
+<!-- ============================================================= -->
+
+<!--                    ABBREVIATED JOURNAL TITLE ATTRIBUTES       -->
+<!--                    Attribute list for Abbreviated Journal Title
+                        <abbrev-journal-title> element             -->
+<!ENTITY % abbrev-journal-title-atts
+            "%jats-common-atts;                                       
+             abbrev-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    JOURNAL METADATA ATTRIBUTES                -->
+<!--                    Attributes for the <journal-meta>
+                        element                                    -->
+<!ENTITY % journal-meta-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    JOURNAL TITLE ATTRIBUTES                   -->
+<!--                    Attributes for the <journal-title>
+                        element                                    -->
+<!ENTITY % journal-title-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    JOURNAL TITLE GROUP ATTRIBUTES             -->
+<!--                    Attributes for the <journal-title-group>
+                        element                                    -->
+<!ENTITY % journal-title-group-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                              #IMPLIED" >
+
+
+<!--                    JOURNAL SUBTITLE GROUP ATTRIBUTES          -->
+<!--                    Attributes for the <journal-subtitle>
+                        element                                    -->
+<!ENTITY % journal-subtitle-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                              #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang  NMTOKEN                            #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    JOURNAL METADATA                           -->
+<!-- ============================================================= -->
+
+
+<!--                    JOURNAL METADATA MODEL                     -->
+<!--                    Content model for the journal metadata
+                        element <journal-meta>                     -->
+<!ENTITY % journal-meta-model
+                        "(journal-id*, journal-title-group*,
+                          (%contrib-group.class; |
+                          %aff-alternatives.class;)*,
+                          issn*, issn-l?, isbn*, 
+                          publisher?, notes*, self-uri*,
+                          custom-meta-group?)"                       >
+
+
+<!--ELEM   journal-id   Defined in %common.ent;                    -->
+<!--ELEM   issn         Defined in %common.ent;                    -->
+<!--ELEM   issn-l       Defined in %common.ent;                    -->
+<!--ELEM   publisher    Defined in %common.ent;                    -->
+<!--ELEM   notes        Defined in %common.ent;                    -->
+<!--ELEM   custom-meta-group
+                        Defined in %common.ent;                    -->
+
+
+<!--                    JOURNAL METADATA                           -->
+<!--                    Metadata that identifies the journal in which
+                        the article was published
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=journal-meta
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=journal-meta
+                                                                   -->
+<!ELEMENT  journal-meta %journal-meta-model;                         >
+<!ATTLIST  journal-meta
+             %journal-meta-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                    JOURNAL TITLE ELEMENTS                     -->
+<!-- ============================================================= -->
+
+
+<!--                    JOURNAL TITLE GROUP MODEL                  -->
+<!--                    Content model for the element
+                        <journal-title-group>                      -->
+<!ENTITY % journal-title-group-model
+                        "(journal-title*, journal-subtitle*,
+                          trans-title-group*, abbrev-journal-title*)">
+
+
+<!--ELEM   trans-title-group
+                        Defined in %common.ent;                    -->
+
+
+<!--                    JOURNAL TITLE GROUP                        -->
+<!--                    A container element to hold the title and
+                        its subtitle (if any) for the journal in which
+                        the article was published.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=journal-title-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=journal-title-group
+                                                                   -->
+<!ELEMENT  journal-title-group
+                        %journal-title-group-model;                  >
+<!ATTLIST  journal-title-group
+             %journal-title-group-atts;                              >
+
+
+<!--                    JOURNAL TITLE ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <journal-title>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % journal-title-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    JOURNAL TITLE (FULL)                       -->
+<!--                    The title of the journal in which the
+                        article is published.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=journal-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=journal-title
+                                                                   -->
+<!ELEMENT  journal-title
+                        (#PCDATA %journal-title-elements;)*          >
+<!ATTLIST  journal-title
+             %journal-title-atts;                                    >
+
+
+<!--                    JOURNAL SUBTITLE ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <journal-subtitle>                       -->
+<!ENTITY % journal-subtitle-elements
+                        "%journal-title-elements;"                   >
+
+
+<!--                    JOURNAL SUBTITLE                           -->
+<!--                    The subtitle of the journal in which the
+                        article is published.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=journal-subtitle
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=journal-subtitle
+                                                                   -->
+<!ELEMENT  journal-subtitle
+                        (#PCDATA %journal-subtitle-elements;)*       >
+<!ATTLIST  journal-subtitle
+             %journal-subtitle-atts;                                 >
+
+
+<!--                    ABBREVIATED JOURNAL TITLE ELEMENTS         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <abbrev-journal-title>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % abbrev-journal-title-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ABBREVIATED JOURNAL TITLE                  -->
+<!--                    A short form of the title of the journal
+                        in which the article is published.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=abbrev-journal-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=abbrev-journal-title
+                                                                   -->
+<!ELEMENT  abbrev-journal-title
+                        (#PCDATA %abbrev-journal-title-elements;)*   >
+<!ATTLIST  abbrev-journal-title
+             %abbrev-journal-title-atts;                             >
+
+
+<!-- ================== End Journal Metadata Elements  =========== -->
diff --git a/dtd/JATS-link1-3.ent b/dtd/JATS-link1-3.ent
new file mode 100644
index 0000000..2708be1
--- /dev/null
+++ b/dtd/JATS-link1-3.ent
@@ -0,0 +1,604 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Link Element Classes                              -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Link Class Elements v1.3 20210610//EN"
+     Delivered as file "JATS-link1-3.ent"                          -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements in the link class. These are   -->
+<!--             elements that are links (internal or external)    -->
+<!--             by definition, such as URLs <uri> and             -->
+<!--             Cross(X)-references <xref>.                       -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 21. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 20. EXPANSION OF FIXED ATTRIBUTES LIST: There are four   
+     content-defined attributes which are CDATA values 
+     (undetermined) in Archiving, but which are named value 
+     lists in Publishing/Authoring:
+       - @fn-type 
+       - @person-group-type (override is in this module)
+       - @pub-id-type
+       - @ref-type 
+     In order to give users of Publishing and Authoing
+     more flexibility to name new values without 
+     destroying the benefit of named value lists:
+       - A new value “custom” has been added to the named
+           value list of each of these four attributes.
+       - A new attribute @custom-type has been added to
+           each element that takes one of these attributes.
+     The new attribute @custom-type was also added to
+     Green, so that documents valid to Blue or Pumpkin 
+     would also be also valid to Green.
+     In this module:
+      - The element <fn> was given the new attribute 
+        @custom-type. The value "custom" will be
+        documented as a valid footnote type.
+        As an example: 
+           <fn @fn-type=”custom” 
+                         custom-type=”reading-level”>
+     The Best Practice rule (unenforceable in DTDs, but  
+     enforceable in Schematron) is, that if you use the 
+     value “custom” from one of these lists, you should 
+     also record what type of 'custom' in the 
+     @custom-type attribute.                        
+
+
+ 19. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 18. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 17. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 16. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 15. XREF - Changed @ref-type from CDATA back to a fixed 
+     value list, reversing what was done in version 1.2d1.
+     Added new values "award" and "bio".
+
+ 14. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 13. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+     
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 12. XREF - Changed @ref-type from a fixed value list to CDATA
+ 
+ 11. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+      =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 10. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+    =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  9. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  8. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+  7. REFERENCE TYPES
+      - Added "collab"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+           http://jats.nlm.nih.gov/1.1/
+
+  6. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  4. Updated the DTD-version attribute to "0.4" 
+   
+  3. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  2. ACCESSIBILITY - Added @alt to <xref> through %xref-atts;
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE VALUES              -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFAULT TYPE OF CROSS(X)-REFERENCE         -->
+<!--                    Used to say to what the reference is pointing.
+                        May be used for type-specific processing or
+                        validation. Values are, for example:
+                        Affiliation "aff" and Figure "fig", and
+                        Bibliographic ref (to a citation.          -->
+<!ENTITY % ref-types    "aff | app | author-notes | award | 
+                         bibr | bio | boxed-text | 
+                         chem | collab | contrib | corresp |
+                         disp-formula | fig | fn | kwd | list |
+                         plate | scheme | sec | statement |
+                         supplementary-material |
+                         table | table-fn |
+                         other | custom"                             >
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE LISTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    FOOTNOTE ATTRIBUTES                        -->
+<!--                    Attribute list for Footnote element        -->
+<!ENTITY % fn-atts
+            "%jats-common-atts;                                       
+             symbol     CDATA                             #IMPLIED
+             fn-type    CDATA                             #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL              -->
+<!--                    Attribute list for inline supplementary
+                        material                                   -->
+<!ENTITY % inline-supplementary-material-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             mimetype   CDATA                             #IMPLIED
+             mime-subtype
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    TARGET ATTRIBUTES                          -->
+<!--                    Attribute list for <target> element        -->
+<!ENTITY % target-atts
+            "%jats-common-atts-id-required;                                       
+             target-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    X(CROSS) REFERENCE ATTRIBUTES              -->
+<!--                    Attribute list for cross references        -->
+<!ENTITY % xref-atts
+            "%jats-common-atts;                                       
+             alt        CDATA                             #IMPLIED
+             ref-type   (%ref-types;)                     #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             rid        IDREFS                            #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    INTERNAL LINKS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    FOOTNOTE MODEL                             -->
+<!--                    Content model for Footnote <fn>            -->
+<!ENTITY % fn-model     "(label?, (%just-para.class;)+ )"            >
+
+
+<!--                    FOOTNOTE                                   -->
+<!--                    Additional information concerning material in
+                        a particular location in the text. This
+                        material is not considered to be part of the
+                        body of the text, but in addition to or a
+                        commentary on the body.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=fn
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=fn
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=fn
+                                                                   -->
+<!ELEMENT  fn           %fn-model;                                   >
+<!ATTLIST  fn
+             %fn-atts;                                               >
+
+
+<!--                    TARGET ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <target>
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %link-elements; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % target-elements
+                        "%link-elements;"                            >
+
+
+<!--                    TARGET OF AN INTERNAL LINK                 -->
+<!--                    May be placed anywhere within textual
+                        material such as a paragraph to provide a
+                        location (anchor) to which a cross reference
+                        can point
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=target
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=target
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=target
+                                                                   -->
+<!ELEMENT  target       (#PCDATA %target-elements;)*                 >
+<!ATTLIST  target
+             %target-atts;                                           >
+
+
+<!--                    X(CROSS) REFERENCE ELEMENTS                -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <xref>
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %link-elements; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % xref-elements
+                        "%link-elements;"                            >
+
+
+<!--                    X(CROSS) REFERENCE                         -->
+<!--                    Used for any kind of internal article
+                        referencing. The content of the reference
+                        (if present) will be displayed as the link.
+                        This element may be used to point to any
+                        element that takes an "id" attribute.
+                        The @ref-type attribute may be used to name
+                        the element or type of object to which the
+                        <xref> is pointing.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=xref
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=xref
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=xref
+                                                                   -->
+<!ELEMENT  xref         (#PCDATA %xref-elements;)*                   >
+<!ATTLIST  xref
+             %xref-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    EXTERNAL LINKS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL ELEMENTS     -->
+<!--                    Elements for use in the
+                        <inline-supplementary-material> element    -->
+<!ENTITY % inline-supplementary-material-elements
+                        "| %access.class; | %address-link.class; |
+                         %emphasis.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL              -->
+<!--                    An in-text link to an external file that
+                        provides supplementary information for
+                        the document, for example, an audio clip
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=inline-supplementary-material
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=inline-supplementary-material
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=inline-supplementary-material
+                                                                   -->
+<!ELEMENT  inline-supplementary-material
+                        (#PCDATA
+                         %inline-supplementary-material-elements;)*  >
+<!ATTLIST  inline-supplementary-material
+             %inline-supplementary-material-atts;                    >
+
+
+<!-- ================== End Link Class Module ==================== -->
diff --git a/dtd/JATS-list1-3.ent b/dtd/JATS-list1-3.ent
new file mode 100644
index 0000000..4fe5616
--- /dev/null
+++ b/dtd/JATS-list1-3.ent
@@ -0,0 +1,663 @@
+<!-- ============================================================= -->
+<!--  MODULE:    List Element Classes                              -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite List Class Elements v1.3 20210610//EN"
+     Delivered as file "JATS-list1-3.ent"                          -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements in the list class. These are   -->
+<!--             all lists except the lists of bibliographic       -->
+<!--             references (citations). Lists are considered      -->
+<!--             to be composed of items.                          -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera, Inc. on the NLM -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 23. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+  ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+ 22. OBJECT ID Added <object-id> to: 
+        <list>
+
+ 21. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 20. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 19. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 18. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 17. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 16. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+   
+ 15. TERM ATTRIBUTES - Added to <term> the following attributes:
+     - @term-type
+     - @term-status
+     - the four vocabulary attributes described below
+   
+ 14. VOCABULARY/TAXONOMY ATTRIBUTES - Added 4 new attributes for
+     naming (and possibly linking to) a general or controlled
+     taxonomy, vocabulary, index, database or other source of
+     terms: @vocab, @vocab-identifier, @vocab-term, and
+     @vocab-term-identifier
+      - All 4 added to <term>, to name a vocabulary 
+        as the source of the term being identified
+ 
+ 13. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 12. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 11. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+ 
+ 10. TITLE FOR LIST ITEMS
+     Added an optional <title> to the beginning of each <list-item>.
+
+  9. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  8. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added a new attribute list to:
+      - def-head
+      - term-head
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  7. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  6. Updated the DTD-version attribute to "0.4" 
+   
+  5. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  4. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+
+      - def-item through def-item-atts (both)
+      - def-list through def-list-atts (@xml:lang-only;
+          @specific-use already)
+      - list through list-atts (@xml:lang-only; @specific-use already)
+      - list-item through list-item-atts (both)
+      - term through term-atts (both)
+
+  3. DEFINITION LIST HEADS - Removed the dependency in which
+     <term-head> and <def-head> both used the parameter entity
+     %def-list-head-elements; One uses %term-head-elements; and
+     the other uses %def-head-elements; But the
+     %def-list-head-elements; was retained for backward
+     compatibility.
+
+  2. DEF LIST ATTRIBUTES - Removed the dependency whereby <def-list>
+     used both %def-list-atts; and %list-atts;. <def-list> now uses
+     only %def-list-atts; No documents need change.
+     *****Customization Alert: New parameter entity could break some
+     customizations. Check your <def-list> attributes.        *****
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    DEFAULT PE FOR ATTRIBUTE LISTS             -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFINITION LIST: DEFINITION HEAD ATTRIBUTES-->
+<!--                    Attributes for the <def-head> element      -->
+<!ENTITY % def-head-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    DEFINITION LIST: DEFINITION ITEM ATTRIBUTES-->
+<!--                    Attributes for the <def-item> element      -->
+<!ENTITY % def-item-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEFAULT DEFINITION LIST ATTRIBUTES         -->
+<!--                    Default attribute lists to be used for
+                        Definition (2-part) lists                  -->
+<!ENTITY % def-list-atts
+            "%jats-common-atts;                                       
+             list-type  CDATA                             #IMPLIED
+             prefix-word
+                        CDATA                             #IMPLIED
+             list-content
+                        CDATA                             #IMPLIED
+             continued-from
+                        IDREF                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEFAULT LIST CLASS ATTRIBUTES              -->
+<!--                    Default attribute lists to be used for most
+                        of the types of lists.                     -->
+<!ENTITY % list-atts
+            "%jats-common-atts;                                       
+             list-type  CDATA                             #IMPLIED
+             prefix-word
+                        CDATA                             #IMPLIED
+             list-content
+                        CDATA                             #IMPLIED
+             continued-from
+                        IDREF                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEFAULT LIST ITEM ATTRIBUTES               -->
+<!--                    Default attribute for list items           -->
+<!ENTITY % list-item-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEFINITION LIST: TERM ATTRIBUTES           -->
+<!--                    Attributes for the <term> element          -->
+<!ENTITY % term-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             term-status
+                        CDATA                             #IMPLIED
+             term-type  CDATA                             #IMPLIED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DEFINITION LIST: TERM HEAD ATTRIBUTES      -->
+<!--                    Attributes for the <term-head> element     -->
+<!ENTITY % term-head-atts
+            "%jats-common-atts;"                                     >
+
+
+<!-- ============================================================= -->
+<!--                    DEFINITION LIST                            -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFINITION LIST MODEL                      -->
+<!--                    Content model for the <def-list> element   -->
+<!ENTITY % def-list-model
+                        "(label?, title?, term-head?, def-head?,
+                          (%def-item.class;)*, (%def-list.class;)* )">
+
+
+<!--                    DEFINITION LIST                            -->
+<!--                    Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=def-list
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=def-list
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=def-list
+                                                                   -->
+<!ELEMENT  def-list     %def-list-model;                             >
+<!ATTLIST  def-list
+             %def-list-atts;                                         >
+
+
+<!--                    DEFINITION LIST HEAD ELEMENTS              -->
+<!--                    Elements for use in the <def-list> heading
+                        elements <term-head> and <def-head>.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % def-list-head-elements
+                        "%simple-phrase;"                            >
+
+
+<!--                    DEFINITION LIST TERM HEAD ELEMENTS         -->
+<!--                    Elements for use in the <term-head> element-->
+<!ENTITY % term-head-elements
+                        "%def-list-head-elements;"                   >
+
+
+<!--                    DEFINITION LIST DEFINITION HEAD ELEMENTS   -->
+<!--                    Elements for use in the <def-head> element -->
+<!ENTITY % def-head-elements
+                        "%def-list-head-elements;"                   >
+
+
+<!--                    DEFINITION LIST: TERM HEAD                 -->
+<!--                    Title over the first (term) column of a
+                        two-part list
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=term-head
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=term-head
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=term-head
+                                                                   -->
+<!ELEMENT  term-head    (#PCDATA %term-head-elements;)*              >
+<!ATTLIST  term-head
+             %term-head-atts;                                        >
+
+
+<!--                    DEFINITION LIST: DEFINITION HEAD           -->
+<!--                    Title over the second (definition) column
+                        of a two-part list
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=def-head
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=def-head
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=def-head
+                                                                   -->
+<!ELEMENT  def-head     (#PCDATA %def-head-elements;)*               >
+<!ATTLIST  def-head
+             %def-head-atts;                                         >
+
+
+<!--                    DEFINITION LIST: DEFINITION ITEM MODEL     -->
+<!--                    The content model of a <def-item>          -->
+<!ENTITY % def-item-model
+                        "(label?, term, def*)"                       >
+
+
+<!--                    DEFINITION LIST: DEFINITION ITEM           -->
+<!--                    A term and definition pair inside a
+                        definition or two-part list
+                        of a two-part list
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=def-item
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=def-item
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=def-item
+                                                                   -->
+<!ELEMENT  def-item     %def-item-model;                             >
+<!ATTLIST  def-item
+             %def-item-atts;                                         >
+
+
+<!--ELEM   def          Defined in %common.ent;                    -->
+
+
+<!--                    DEFINITION LIST: TERM ELEMENTS             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <term>.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % term-elements
+                        "%simple-phrase; | %block-math.class; |
+                         %simple-display-noalt.class;"               >
+
+
+<!--                    DEFINITION LIST: TERM                      -->
+<!--                    The word, phrase, picture, or other noun
+                        being defined or description that occupies
+                        the first column of a definition or 2-part
+                        list and is the subject of the definition or
+                        description.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=term
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=term
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=term
+                                                                   -->
+<!ELEMENT  term         (#PCDATA %term-elements;)*                   >
+<!ATTLIST  term
+             %term-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    LIST ELEMENTS (PARAGRAPH-LEVEL ELEMENTS)   -->
+<!-- ============================================================= -->
+
+
+<!--                    LIST MODEL                                 -->
+<!--                    Content model for the <list> element       -->
+<!ENTITY % list-model   "((%id.class;)*, label?, title?, 
+                          (%list-item.class;)+)"                     >
+
+
+<!--                    LIST                                       -->
+<!--                    Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=list
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=list
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=list
+                                                                   -->
+<!ELEMENT  list         %list-model;                                 >
+<!ATTLIST  list
+             %list-atts;                                             >
+
+
+<!--                    LIST ITEM ELEMENTS                         -->
+<!--                    The content model of a <list-item>.        -->
+<!ENTITY % list-item-model
+                        "(label?, title?, 
+                          (%just-para.class; | %list.class;)+ )"     >
+
+
+<!--                    LIST ITEM                                  -->
+<!--                    One item in a list
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=list-item
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=list-item
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=list-item
+                                                                   -->
+<!ELEMENT  list-item    %list-item-model;                            >
+<!ATTLIST  list-item
+             %list-item-atts;                                        >
+
+
+<!-- ================== End List Class Module ==================== -->
diff --git a/dtd/JATS-math1-3.ent b/dtd/JATS-math1-3.ent
new file mode 100644
index 0000000..3111c26
--- /dev/null
+++ b/dtd/JATS-math1-3.ent
@@ -0,0 +1,563 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Math Class Elements                               -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Math Class Elements v1.3 20210610//EN"
+     Delivered as file "JATS-math1-3.ent"                          -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements in the math classes            -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 23. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+     
+ 22. OBJECT ID Added <object-id> to: 
+        <disp-formula>, <disp-formula-group>
+  
+ 21. DISPLAY FORMULA - Held our noses and added <caption> to 
+     <display-formula>.
+ 
+ 20. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+      
+ 19. ADDED SUBJECTS TO WHEREVER KEYWORDS ALLOWED - Added
+     <subj-group> directly to the following elements:
+      - disp-formula
+      - disp-formula-group 
+
+  
+ 18. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 17. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 16. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 15. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 14. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+     
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 13. INLINE FORMULA - Added accessibility elements <alt-text> and
+     <long-desc> to the model of <inline-formula>, by adding the 
+     access.class PE.
+ 
+ 12. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 11. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 10. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  9. TEXT-MATH - Added @specific-use to the attributes for
+     <text-math>, primarily for use when <tex-math> is used
+     inside <alternatives>.
+
+  8. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+ 
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  7. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+  6. ABSTRACTS AND KEYWORDS ON NEW STRUCTURES
+     - Added <abstract> (through %abstract.class;) and <kwd-group> 
+       (through %kwd-group.class;) to the following elements:
+        - disp-formula (through %disp-formula-elements;)
+        - disp-formula-group (through %disp-formula-group-model;)
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  4. Updated the DTD-version attribute to "0.4" 
+   
+  3. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  2. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+
+      - disp-formula through disp-formula-atts (@xml:lang-only;
+          @specific-use already)
+      - disp-formula-group through disp-formula-group-atts
+          (@xml:lang-only; @specific-use already)
+      - inline-formula through inline-formula-atts
+          (@specific-use-only; @xml:lang already)
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    DISPLAY FORMULA ATTRIBUTES                 -->
+<!--                    Attributes for the <disp-formula> element  -->
+<!ENTITY % disp-formula-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DISPLAY FORMULA GROUP ATTRIBUTES           -->
+<!--                    Attributes for the <disp-formula-group>
+                        element                                    -->
+<!ENTITY % disp-formula-group-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    INLINE FORMULA ATTRIBUTES                  -->
+<!--                    Attribute list for the <inline-formula>
+                        element                                    -->
+<!ENTITY % inline-formula-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    TEX MATH ATTRIBUTES                        -->
+<!--                    Attributes for the <disp-formula> element  -->
+<!ENTITY % tex-math-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             notation   NOTATION (LaTeX | tex | TEX | TeX)
+                                                          #IMPLIED
+             version    CDATA                             #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    MATH ELEMENTS (INLINE LEVEL)               -->
+<!-- ============================================================= -->
+
+
+<!--                    FORMULA, INLINE ELEMENTS                   -->
+<!--                    Elements for use in the <inline-formula>
+                        element                                    -->
+<!ENTITY % inline-formula-elements
+                        "| %access.class; | %emphasis.class; |
+                         %inline-display.class; |
+                         %inline-math.class; | %math.class; |
+                         %phrase-content.class; | %subsup.class;"    >
+
+
+<!--                    FORMULA, INLINE MODEL                      -->
+<!--                    Content model for an <inline-formula>      -->
+<!ENTITY % inline-formula-model
+                        "(#PCDATA %inline-formula-elements;)*"       >
+
+
+<!--                    FORMULA, INLINE                            -->
+<!--                    Inline element for a mathematical
+                        equation, expression, or formula
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=inline-formula
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=inline-formula
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=inline-formula
+                                                                   -->
+<!ELEMENT  inline-formula
+                        %inline-formula-model;                       >
+<!ATTLIST  inline-formula
+             %inline-formula-atts;                                   >
+
+
+<!-- ============================================================= -->
+<!--                    MATH ELEMENTS (INLINE LEVEL)               -->
+<!-- ============================================================= -->
+
+
+<!--                    DISPLAY FORMULA ELEMENTS                   -->
+<!--                    Elements for use in the <disp-formula>
+                        element                                    -->
+<!ENTITY % disp-formula-elements
+                        "| %access.class; | %abstract.class; |
+                         %address-link.class; |%break.class; | 
+                         %caption.class; | %emphasis.class; |
+                         %id.class; | %inline-display-noalt.class; |
+                         %inline-math.class; | %kwd-group.class; |
+                         %subj-group.class; |
+                         %label.class; | %phrase-content.class; |
+                         %math.class; |  %simple-display.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    FORMULA, DISPLAY MODEL                     -->
+<!--                    Content model for an <disp-formula>        -->
+<!ENTITY % disp-formula-model
+                        "(#PCDATA %disp-formula-elements;)*"         >
+
+
+<!--                    FORMULA, DISPLAY                           -->
+<!--                    Block-level (callout) element for a
+                        mathematical equation, expression, or
+                        formula.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=disp-formula
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=disp-formula
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=disp-formula
+                                                                   -->
+<!ELEMENT  disp-formula %disp-formula-model;                         >
+<!ATTLIST  disp-formula
+             %disp-formula-atts;                                     >
+
+
+<!--                    FORMULA, DISPLAY GROUP MODEL               -->
+<!--                    Content model for an <disp-formula-group>  -->
+<!ENTITY % disp-formula-group-model
+                        "((%id.class;)*, label?, (%caption.class;)?,
+                          (%abstract.class;)*, (%kwd-group.class;)*,
+                          (%subj-group.class;)*, 
+                          (%access.class; | %address-link.class;)*,
+                          (%block-math.class;)* )"                   >
+
+
+<!--                    FORMULA, DISPLAY GROUP                     -->
+<!--                    Used for a group of equations or other
+                        mathematical expressions that are displayed
+                        together.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=disp-formula-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=disp-formula-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=disp-formula-group
+                                                                   -->
+<!ELEMENT  disp-formula-group
+                        %disp-formula-group-model;                   >
+<!ATTLIST  disp-formula-group
+             %disp-formula-group-atts;                               >
+
+
+<!--                    TEX MATH EQUATION                          -->
+<!--                    Used to hold encoded math, expressed in TeX
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=tex-math
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=tex-math
+                                                                   -->
+<!ELEMENT  tex-math     (#PCDATA)                                    >
+<!ATTLIST  tex-math
+             %tex-math-atts;                                         >
+
+
+<!-- ================== End Math Class Elements Module =========== -->
diff --git a/dtd/JATS-mathml3-mathmlsetup1-3.ent b/dtd/JATS-mathml3-mathmlsetup1-3.ent
new file mode 100644
index 0000000..631ba9e
--- /dev/null
+++ b/dtd/JATS-mathml3-mathmlsetup1-3.ent
@@ -0,0 +1,493 @@
+<!-- ============================================================= -->
+<!--  MODULE:    MathML DTD SETUP MODULE                           -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite MathML 3.0 Setup Module v1.3 20210610//EN"
+     Delivered as file "JATS-mathml3-mathmlsetup1-3.ent"           -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Provides the organization for using the           -->
+<!--             MathML 3.0 DTD                                    -->
+<!--              - Overrides to standard parameter entities used  -->
+<!--                in the MathML 3.0 DTD                          -->
+<!--             - Calls the MathML 3.0 DTD                        -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             1) mathml3.dtd  (MathML 3.0 DTD)                  -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             September 2013                                    -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 7186. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 17. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 16. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 15. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 14. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 13. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 12. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 11. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 10. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  9. JATS became version "1.1d3" and "v1.1d3 20150301"
+    
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  8. OASIS TABLE NAMESPACE MODIFICATIONS - Added a new module
+     that sets up the namespace URI and namespace prefix for
+     the OASIS tables models.
+  
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  7. PARAMETER ENTITY NAME CHANGE IN THE MATHML DTD
+     When MathML 2.0 became MathML 3.0, the parameter entity
+     %product.class; was defined both in the MathML 3.0 DTD and also 
+     in JATS-default-classes.ent. Renamed class in the MathML DTD
+     until JATS names can be changed. Renamed the MathML parameter 
+     entity to "mml-product.class".
+
+     The name of the parameter entity that establishes the model of
+     the <annotation-xml> element was changed.
+     "Annotation-xml.content" became "annotation-xml.model".
+
+  6. PARAMETER ENTITY NAME CHANGE - When MathML 2.0 became MathML 3.0,
+     the name of the parameter entity that establishes the model of
+     the <annotation-xml> element was changed.
+     "Annotation-xml.content" became "annotation-xml.model".
+
+  5.  MAJOR CHANGE: MathML 2.0 replaced with MathML 3.0
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    SET UP FOR THE MathML MODULE               -->
+<!-- ============================================================= -->
+
+
+<!--                    MathML DTD                                 -->
+<!--                    The official version of the MathML 3.0 can
+                        be found at: http://www.w3.org/TR/MathML3/
+
+                        PUBLIC "-//W3C//DTD MathML 3.0//EN"
+                        SYSTEM "mathml3.dtd"                       -->
+
+
+<!-- ============================================================= -->
+<!--                    SET UP W3C XML SCHEMA                      -->
+<!-- ============================================================= -->
+
+
+<!--                    MAKE PREFIX EQUAL "xsi" (same as MathML)   -->
+<!ENTITY % Schema.prefix
+                        "xsi"                                        >
+
+<!--                    SET UP NAMESPACE FOR SCHEMA
+                           (same as MathML)                        -->
+<!ENTITY % Schema.xmlns "http://www.w3.org/2001/XMLSchema-instance"  >
+
+
+<!--                    OVER-RIDE MATHML DTD TO MAKE EXPLICIT NS   -->
+<!--                    MathML sets this up but then lets the
+                        attribute be a CDATA one, not the real
+                        namespace URI                              -->
+<!ENTITY % Schema.xmlns.attrib
+     "xmlns:%Schema.prefix;  CDATA          #FIXED '%Schema.xmlns;'" >
+
+
+<!-- ============================================================= -->
+<!--                    SET UP "mml" AS THE MATH PREFIX            -->
+<!-- ============================================================= -->
+
+
+<!--                    MAKE MATH PREFIX PARAMETER ENTITY HAPPEN   -->
+<!ENTITY % MATHML.prefixed 
+                        "INCLUDE"                                    >
+
+
+<!--                    MAKE PREFIX EQUAL "mml"                    -->
+<!ENTITY % MATHML.prefix "mml"                                       >
+
+
+<!--                    SET UP "pfx"                               -->
+<![%MATHML.prefixed;[
+<!ENTITY % MATHML.pfx   "%MATHML.prefix;:"                           >
+]]>
+
+
+<!--                    USE "pfx" TO SET THE MATH ELEMENT NAME     -->
+<!ENTITY % math.qname   "%MATHML.pfx;math"                           >
+
+
+
+<!-- ============================================================= -->
+<!--                    CALL THE MATHML ENTITIES                   -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML CHARACTER ENTITIES                  -->
+<!--                    Set the "INCLUDE" or "IGNORE" marked section
+                        switch for the MATHML 3.0 DTD. This switch
+                        determines whether the math processing in
+                        the -%mathml.dtd; module or the
+                        -%xmlspecchars.ent; module in this DTD Suite
+                        will invoke the sets of special characters
+                        that are defined AND INVOKED in the
+                        -%xmlspecchars.ent; module.
+                        A value of "IGNORE" turns off the second
+                        invocation from the MathML DTD.            -->
+<!ENTITY % mathml-charent.module
+                        "IGNORE"                                     >
+
+
+<!--                    MATHML-SPECIFIC CHARACTER ENTITIES         -->
+<!--                    Because the MATHML invocation is canceled
+                        using the parameter entity just defined,
+                        the two external entities below must be
+                        invoked from here, as neither XMLspecchars
+                        nor the MathML DTD will invoke them.       -->
+
+<!--                    New characters defined by MathML           -->
+%ent-mmlextra;
+
+
+<!--                    MathML aliases for characters defined above-->
+%ent-mmlalias;
+
+
+<!-- ============================================================= -->
+<!--                    RESTRICT CONTENT OF ANNOTATION             -->
+<!-- ============================================================= -->
+
+<!--                    MATHML ANNOTATION MODEL                    -->
+<!--                    The MathML 3.0 DTD establishes the content of 
+                        the <mml:annotation-xml> element as any MathML
+                        expression. This is unnecessarily broad, 
+                        causing inconvenience during conversion. 
+                        The model has been restricted to
+                        one or more paragraphs.                    -->
+<!ENTITY % annotation-xml.model
+                        "(p+)"                                       >
+
+
+<!-- ============================================================= -->
+<!--                    MathML 3.0 INVOCATION                      -->
+<!-- ============================================================= -->
+
+%mathml.dtd;
+
+
+<!-- ================== End MATHML Setup Module ================== -->
diff --git a/dtd/JATS-mathml3-modules1-3.ent b/dtd/JATS-mathml3-modules1-3.ent
new file mode 100644
index 0000000..2ded91d
--- /dev/null
+++ b/dtd/JATS-mathml3-modules1-3.ent
@@ -0,0 +1,333 @@
+<!-- ============================================================= -->
+<!--  MODULE:    JATS MathML 3.0 Modules                           -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS MathML 3.0 Modules v1.3 20210610//EN"
+     Delivered as file "JATS-mathml3-modules1-3.ent"               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    To name any modules needed for MathML 3.0 (since  -->
+<!--             NISO JATS V1.0 was MathML 2.0, and the two are    -->
+<!--             not backwards compatible.                         -->
+<!--                                                               -->
+<!-- CONTAINS:   Modules declarations for MathML 3.0               -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This DTD was created from the JATS DTD Suite.     -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             November 2013                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Publishing DTD is built from the      -->
+<!--             Archiving and Interchange DTD Suite.              -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 12. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 11. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 10. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+  9. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+  8. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+  7. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  6. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+  5. JATS became version "1.2d1" and "v1.2d1 20170631" 
+ 
+    =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  4. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  3. JATS became version "1.1d3" and "v1.1d3 20150301"
+  
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+   2. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+  
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 concerning 
+     ANSI/NISO Z39.96-2012 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  1. OASIS TABLE NAMESPACE MODIFICATIONS - Added a new module
+     that sets up the namespace URI and namespace prefix for
+     the OASIS tables models.
+                                                                   -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                     MATHML 3.0 MODULES                        -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML 3.0 QUALIFIED NAMES                 -->
+<!ENTITY % mathml-qname.mod
+                        PUBLIC
+"-//W3C//ENTITIES MathML 3.0 Qualified Names 1.0//EN"
+"mathml3-qname1.mod"                                                 >
+
+
+<!--                    MATHML 3.0 DTD                             -->
+<!ENTITY % mathml.dtd   PUBLIC
+"-//W3C//DTD MathML 3.0//EN" 
+"mathml3.dtd"                                                        >
+
+
+<!--                    MATHML 3.0 EXTRA ENTITIES                  -->
+<!ENTITY % ent-mmlextra
+                        PUBLIC
+"-//W3C//ENTITIES Extra for MathML 3.0//EN" 
+"mathml/mmlextra.ent"                                                >
+
+
+<!--                    MATHML 3.0 ALIASES                         -->
+<!ENTITY % ent-mmlalias
+                        PUBLIC
+"-//W3C//ENTITIES Aliases for MathML 3.0//EN" 
+"mathml/mmlalias.ent"                                                >
+
+
+<!-- =================== End MathML 3.0 Modules ================== -->
diff --git a/dtd/JATS-modules1-3.ent b/dtd/JATS-modules1-3.ent
new file mode 100644
index 0000000..190edbf
--- /dev/null
+++ b/dtd/JATS-modules1-3.ent
@@ -0,0 +1,769 @@
+<!-- ============================================================= -->
+<!--  MODULE:    JATS DTD Suite Module of Modules                  -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Module of Modules v1.3 20210610//EN"
+     Delivered as file "JATS-modules1-3.ent"                       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    For naming all the external modules (except       -->
+<!--             this module itself and the customization modules) -->
+<!--             that are part of the JATS DTD Suite. A specific   -->
+<!--             DTD will select from these modules by referencing -->
+<!--             the external Parameter Entities defined below that-->
+<!--             name the modules of the suite. To include a set   -->
+<!--             of elements (such as all the lists or the MathML  -->
+<!--             elements), reference the external Parameter Entity-->
+<!--             of the module that contains these declarations,   -->
+<!--             then modify the classes or content models to use  -->
+<!--             the new elements.                                 -->
+<!--                                                               -->
+<!-- CONTAINS:   Entity declarations and public names for all the  -->
+<!--             JATS DTD Suite external modules. Note: The modules-->
+<!--             are NOT referenced (called/invoked) in this       -->
+<!--             module, they are merely DECLARED.  The DTD or     -->
+<!--             a setup module (such as for the XHTML tables)     -->
+<!--             will invoke the external parameter entity to      -->
+<!--             call each module.                                 -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 18. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 17. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+     
+ 16. QUESTIONS AND ANSWERS - Added the BITS modules question and 
+     answer modules, so quizzes can be constructed for articles.
+     
+ 15. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 14. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 13. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 12. INLINE EMBEDDED INDEX - Added definition of BITS module that
+     defines inline (embedded) index terms.
+ 
+ 11. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 10. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+  9. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  8. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  6. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based 
+     DTDs, XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. NLMCITATION - Added module for deprecated element <nlm-citation>
+     because the element is called in a default class 
+     (citation.class) that, for reasons of backwards compatibility,
+     will not be changed at this time.
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/                          -->
+
+<!-- ============================================================= -->
+<!--                    DEFAULT CLASSES AND MIXES                  -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFAULT ELEMENT CLASSES MODULE             -->
+<!--                    Set up the Parameter Entities and element
+                        class definitions that will be used to
+                        establish the content models for the
+                        Archiving and Interchange DTD.             -->
+<!ENTITY % default-classes.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Default Element Classes Module v1.3 20210610//EN"
+"JATS-default-classes1-3.ent"                                      >
+
+
+<!--                    DEFAULT ELEMENT MIXES MODULE               -->
+<!--                    Set up the Parameter Entities and element
+                        mix definitions that will be used in
+                        content models for the Archiving and
+                        Interchange DTD.                           -->
+<!ENTITY % default-mixes.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Default Element Mixes Module v1.3 20210610//EN"
+"JATS-default-mixes1-3.ent"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON ATTRIBUTES SHARED BY ALL ELEMENTS   -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON ATTRIBUTES SHARED BY ALL ELEMENTS   -->
+<!ENTITY % JATS-common-atts.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Common Attributes (for all elements) v1.3 20210610//EN"
+"JATS-common-atts1-3.ent"                                          >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON ELEMENTS SHARED BY MANY MODULES     -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON (SHARED) ELEMENT DECLARATIONS       -->
+<!ENTITY % common.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Common (Shared) Elements Module v1.3 20210610//EN"
+"JATS-common1-3.ent"                                               >
+
+
+<!-- ============================================================= -->
+<!--                    CLASS MODULES (ALPHABETICAL ORDER)         -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE METADATA ELEMENTS                  -->
+<!ENTITY % articlemeta.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Journal Article Metadata Elements v1.3 20210610//EN"
+"JATS-articlemeta1-3.ent"                                          >
+
+
+<!--                    BACK MATTER ELEMENTS                       -->
+<!ENTITY % backmatter.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Back Matter Elements v1.3 20210610//EN"
+"JATS-backmatter1-3.ent"                                           >
+
+
+<!--                    DISPLAY (GRAPHICAL) ELEMENTS INVOCATION    -->
+<!ENTITY % display.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Display Class Elements v1.3 20210610//EN"
+"JATS-display1-3.ent"                                              >
+
+
+<!--                    FORMATTING ELEMENTS                        -->
+<!--                    Elements that change rendition/display. This
+                        module includes the Appearance Class, the
+                        Break Class, and the Emphasis Class        -->
+<!ENTITY % format.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Formatting Element Classes v1.3 20210610//EN"
+"JATS-format1-3.ent"                                               >
+
+
+<!--                    FUNDING ELEMENTS                           -->
+<!--                    Elements that model open access, grant,
+                        sponsorship, or other funding information,
+                        for example the grant number (<award-id>)
+                        and the <principal-investigator>           -->
+<!ENTITY % funding.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Funding Elements v1.3 20210610//EN"
+"JATS-funding1-3.ent"                                              >
+
+
+<!--                    JOURNAL METADATA ELEMENTS                  -->
+<!ENTITY % journalmeta.ent PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Journal Metadata Elements v1.3 20210610//EN"
+"JATS-journalmeta1-3.ent"                                          >
+
+
+<!--                    LINK ELEMENTS                              -->
+<!ENTITY % link.ent  PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Link Class Elements v1.3 20210610//EN"
+"JATS-link1-3.ent"                                                 >
+
+
+<!--                    LIST ELEMENTS                              -->
+<!ENTITY % list.ent  PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite List Class Elements v1.3 20210610//EN"
+"JATS-list1-3.ent"                                                 >
+
+
+<!--                    MATH ELEMENTS                              -->
+<!ENTITY % math.ent  PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Math Class Elements v1.3 20210610//EN"
+"JATS-math1-3.ent"                                                 >
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!ENTITY % para.ent  PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Paragraph-Like Elements v1.3 20210610//EN"
+"JATS-para1-3.ent"                                                 >
+
+
+<!--                    PHRASE-LEVEL CONTENT ELEMENTS              -->
+<!ENTITY % phrase.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Subject Phrase Class Elements v1.3 20210610//EN"
+"JATS-phrase1-3.ent"                                               >
+
+
+<!--                    BIBLIOGRAPHY REFERENCES (CITATION) ELEMENTS-->
+<!ENTITY % references.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Bibliographic Reference (Citation) Class Elements v1.3 20210610//EN"
+"JATS-references1-3.ent"                                           >
+
+
+<!--                    RELATED OBJECT ELEMENT                     -->
+<!--                    Defines the <related-object> element to
+                        describe a related object such as a
+                        related book or a dataset.                 -->
+<!ENTITY % related-object.ent
+                       PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Related Object Element v1.3 20210610//EN"
+"JATS-related-object1-3.ent"                                       >
+
+
+<!--                    SECTION ELEMENTS                           -->
+<!ENTITY % section.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Section Class Elements v1.3 20210610//EN"
+"JATS-section1-3.ent"                                              >
+
+
+<!-- ============================================================= -->
+<!--                    TABLES: XHTML TABLE MODULES                -->
+<!-- ============================================================= -->
+
+
+<!--                    XHTML TABLE SETUP MODULE                   -->
+<!--                    Set all Parameter Entities needed by the
+                        HTML 4.0 (XHTML) table model, and then
+                        call the module containing that model.
+                        Authoring Note: If wanted, this module
+                        will be invoked in the DTD module          -->
+<!ENTITY % XHTMLtablesetup.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite XHTML Table Setup Module v1.3 20210610//EN"
+"JATS-XHTMLtablesetup1-3.ent"                                      >
+
+
+<!--                    XHTML TABLE MODEL                          -->
+<!--                    The public XML version of the XHTML 1.1
+                        table model. This module is invoked in the
+                         module %JATS-XHTMLtablesetup1-3d2.ent;    -->
+<!ENTITY % xhtml-table-1.mod
+                        PUBLIC
+"-//W3C//ELEMENTS XHTML Tables 1.0//EN"
+"xhtml-table-1.mod"                                                  >
+
+
+<!--                    XHTML TABLE INLINE STYLE MODULE            -->
+<!--                    The public XML version of the XHTML 1.1
+                        inline style module for use in XHTML tables.
+                        This module is invoked in the
+                         module %JATS-XHTMLtablesetup1-3d2.ent;             -->
+<!ENTITY % xhtml-inlstyle-1.mod
+                        PUBLIC
+"-//W3C//ENTITIES XHTML Inline Style 1.0//EN"
+"xhtml-inlstyle-1.mod"                                                  >
+
+
+<!-- ============================================================= -->
+<!--                    ALI: NISO ACCESS AND INDICATORS            -->
+<!-- ============================================================= -->
+
+
+<!--                    NISO ACCESS AND INDICATORS (RP-22-1015)    -->
+<!--                    Set all Parameter Entities needed by the
+                        NISO ALI licensing elements.
+                        This module is invoked by each DTD.        -->
+<!ENTITY % JATS-ali-namespace.ent
+                        PUBLIC
+"-//NLM//DTD JATS ALI Namespace Module v1.3 20210610//EN"
+"JATS-ali-namespace1-3.ent"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    TABLES: OASIS EXCHANGE TABLE MODULES       -->
+<!-- ============================================================= -->
+
+
+<!--                    OASIS XML TABLE SETUP MODULE               -->
+<!--                    Set all Parameter Entities needed by the
+                        OASIS (CALS) Table Exchange table model.
+                        Authoring Note: If wanted, this module
+                        will be invoked in the DTD module          -->
+<!ENTITY % oasis-tablesetup.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) Namespaced OASIS XML Table Setup Module v1.3 20210610//EN"
+"JATS-oasis-tablesetup1-3.ent"                                     >
+
+
+<!--                    OASIS XML TABLE MODEL                      -->
+<!--                    The OASIS (CALS) Table Exchange table model
+                        This module is invoked in
+                        %JATS-oasis-tablesetup1-3d2.ent;           -->
+<!ENTITY % oasis-exchange.ent
+                        PUBLIC
+"-//OASIS//DTD XML Exchange Table Model 19990315//EN"
+"oasis-exchange.ent"                                                 >
+
+
+<!-- ============================================================= -->
+<!--                    SPECIAL CHARACTER MODULES                  -->
+<!-- ============================================================= -->
+
+
+<!--                    SPECIAL CHARACTERS DECLARATIONS            -->
+<!--                    Declares any standard XML special character
+                        entities used in this DTD                  -->
+<!ENTITY % xmlspecchars.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite XML Special Characters Module v1.3 20210610//EN"
+"JATS-xmlspecchars1-3.ent"                                         >
+
+
+<!--                    CUSTOM SPECIAL CHARACTERS DECLARATIONS     -->
+<!--                    Declares any custom special character
+                        entities created for this Suite            -->
+<!ENTITY % chars.ent PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Custom Special Characters Module v1.3 20210610//EN"
+"JATS-chars1-3.ent"                                                >
+
+
+<!-- ============================================================= -->
+<!--                    MATH: MATHML MODULES                       -->
+<!--                    Only one of the modules below may be       -->
+<!--                    invoked by a DTD.                          -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML 2.0 SETUP MODULE                    -->
+<!--                    Called from the DTD to include the MathML 2.0
+                        elements in the tag set.                   -->
+<!ENTITY % mathmlsetup.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite MathML Setup Module v1.3 20210610//EN"
+"JATS-mathmlsetup1-3.ent"                                          >
+
+
+<!--                    MATHML 3.0 SETUP MODULE                    -->
+<!--                    Called from the DTD to include the MathML 3.0
+                        elements in the tag set.                   -->
+<!ENTITY % mathml3-mathmlsetup.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite MathML 3.0 Setup Module v1.3 20210610//EN"
+"JATS-mathml3-mathmlsetup1-3.ent"                                  >
+
+
+<!-- ============================================================= -->
+<!--                     MATHML 2.0 MODULES (below for JATS V1)    -->
+<!--                     MATHML 3.0 modules are invoked in the DTD -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML 2.0 QUALIFIED NAMES                 -->
+<!ENTITY % mathml-qname.mod
+                        PUBLIC
+"-//W3C//ENTITIES MathML 2.0 Qualified Names 1.0//EN"
+"mathml2-qname-1.mod"                                                >
+
+
+<!--                    MATHML 2.0 DTD                             -->
+<!ENTITY % mathml.dtd   PUBLIC
+"-//W3C//DTD MathML 2.0//EN"
+"mathml2.dtd"                                                        >
+
+
+<!--                    MATHML 2.0 EXTRA ENTITIES                  -->
+<!ENTITY % ent-mmlextra
+                        PUBLIC
+"-//W3C//ENTITIES Extra for MathML 2.0//EN"
+"mathml/mmlextra.ent"                                               >
+
+
+<!--                    MATHML 2.0 ALIASES                         -->
+<!ENTITY % ent-mmlalias
+                        PUBLIC
+"-//W3C//ENTITIES Aliases for MathML 2.0//EN"
+"mathml/mmlalias.ent"                                               >
+
+
+<!-- ============================================================= -->
+<!--                     NOTATIONS MODULE                          -->
+<!-- ============================================================= -->
+
+
+<!--                    NOTATION DECLARATIONS MODULE               -->
+<!--                    Container module for the Notation Declarations
+                        to be used with this DTD suite.  Placed in
+                        their own module for easy expansion or
+                        replacement.                               -->
+<!ENTITY % notat.ent PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Notation Declarations v1.3 20210610//EN"
+"JATS-notat1-3.ent"                                                >
+
+<!-- ============================================================= -->
+<!--                     NLM CITATION (DEPRECATED ELEMENT) MODULE  -->
+<!-- ============================================================= -->
+
+
+<!--                    NLM CITATION MODULE                        -->
+<!--                    The only new element created for the
+                        Publishing DTD, the highly structured NLM
+                        citation, to enforce a slightly loose version
+                        of an NLM-structured bibliographic reference.
+                        Sequence is enforced and interior punctuation
+                        is expected to be generated.               -->
+<!ENTITY % nlmcitation.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) NLM Citation v1.3 20210610//EN"
+"JATS-nlmcitation1-3.ent"                                          >
+
+<!-- ============================================================= -->
+<!--                     MODULES TO ADD BITS INLINE INDEX ELEMENTS -->
+<!-- ============================================================= -->
+
+
+<!--                    BITS 2.0 EMBEDDED INDEX ELEMENTS MOD       -->
+<!--                    Element declarations the index elements
+                        which are embedded in the document
+                        narrative.                                 -->
+<!ENTITY % index-term.ent
+                        PUBLIC
+"-//NLM//DTD BITS Embedded Index Element Module v2.0 20151225//EN"
+"BITS-embedded-index2.ent"                                           >
+
+<!-- ============================================================= -->
+<!--                     MODULES TO ADD BITS QUESTION/ANSWERS      -->
+<!-- ============================================================= -->
+
+
+<!--                    BITS 2.0 QUESTION AND ANSWER MODULE        -->
+<!--                    Element declarations for BITS questions
+                        and answers (not complete tests, but used
+                        to put build quizzes and tests.            -->
+<!ENTITY % question-answer.ent
+                        PUBLIC
+"-//NLM//DTD BITS Question and Answer Module v2.0 20151225//EN"
+"BITS-question-answer2.ent"                                          >
+
+<!-- ============================================================= -->
+<!--                     NAMESPACE FOR W3C XSI PREFIX FOR DTDS
+                         THAT DO NOT USE MATHML                    -->
+<!-- ============================================================= -->
+
+<!--<!ENTITY % JATS-xsi-schema-namespace.ent
+                        PUBLIC
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite XSI Namespace Setup Module v1.3 20210610//EN"
+"JATS-xsi-schema-namespace1-3.ent"                                  >
+-->
+<!-- =================== End Journal Article Module of Modules === -->
diff --git a/dtd/JATS-nlmcitation1-3.ent b/dtd/JATS-nlmcitation1-3.ent
new file mode 100644
index 0000000..0cee388
--- /dev/null
+++ b/dtd/JATS-nlmcitation1-3.ent
@@ -0,0 +1,428 @@
+<!-- ============================================================= -->
+<!--  MODULE:    NLM Citation                                      -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) NLM Citation v1.3 20210610//EN"
+Delivered as file "JATS-nlmcitation1-3.ent"                        -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Deprecated 2012                                   -->
+<!--             This DTD Suite module adds the model for the      -->
+<!--             NLM Structured bibliographic citation. This model -->
+<!--             The model loosely reflects NLM's style, in that   -->
+<!--             the model allows the tagging of all "legal" NLM   -->
+<!--             citations and enforces the sequence in which      -->
+<!--             content must appear if it is present. However,    -->
+<!--             this model does not provide guidance on what      -->
+<!--             information is required for each type of cited    -->
+<!--             content.                                          -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             September 2004                                    -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Publishing DTD is built from the      -->
+<!--             Archiving and Interchange DTD Suite.              -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+ Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 17. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+    ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 16. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)     
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 15. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 14. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 13. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 12. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 11. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+ 10. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+      =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  9. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+    =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  8. JATS became version "1.1d3" and "v1.1d3 20150301"
+ 
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+  
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  6. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+  
+  5. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  4. Updated the DTD-version attribute to "0.4" 
+   
+  3. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  2. NLM CITATION ATTRIBUTES - Removed the dependency whereby
+     the NLM citation used the same attributes as the other types
+     of citation via %citation-atts;. <nlm-citation> now uses
+     only %nlm-citation-atts; No documents need change.
+     - added @xml:lang
+     - added @specific-use
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    NEW ELEMENT DECLARATIONS                   -->
+<!--                    Declarations of elements that are new to   -->
+<!--                    this DTD.                                  -->
+<!--                    NOTE: All new structures must be mappable  -->
+<!--                    to the archiving/interchange DTD and the   -->
+<!--                    mapping should be described when the new   -->
+<!--                    element is declared.                       -->
+<!-- ============================================================= -->
+
+
+<!--                    NLM CITATION ATTRIBUTES                    -->
+<!--                    Attributes for all three types of
+                        citations (<mixed-citation>,
+                        <element-citation>, and <nlm-citation>).   -->
+<!ENTITY % nlm-citation-atts
+            "%jats-common-atts;                                       
+             publication-type
+                        CDATA                             #IMPLIED
+             publisher-type
+                        CDATA                             #IMPLIED
+             publication-format
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    NLM CITATION MODEL                         -->
+<!--                    This structured citation model is loosely
+                        reflects the NLM's house style, in that
+                        it allows the tagging of all "legal" NLM
+                        citations and enforces the sequence in which
+                        content must appear if it is present.
+                        This model assumes that punctuation between
+                        the parts of a citation will be generated
+                        on display or on export.
+                        (Deprecated after Version 3.0)
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=nlm-citation
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=nlm-citation
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=nlm-citation
+                                                                   -->
+<!ELEMENT  nlm-citation
+                        ((person-group | collab)*,
+                         (article-title | trans-title)*,
+                         source?, patent?, trans-source?, year?,
+                         ((month?, day?, time-stamp?) | season?),
+                         access-date?, volume?, edition?,
+                         conf-name?, conf-date?, conf-loc?,
+                         (issue | supplement)*, publisher-loc?,
+                         publisher-name?, (fpage?, lpage?)*,
+                         page-count?, series?, comment*, pub-id*,
+                         annotation?)                                >
+
+<!ATTLIST  nlm-citation
+             %nlm-citation-atts;                                     >
+
+
+<!-- ================== End NLM Citation Module ================== -->
diff --git a/dtd/JATS-notat1-3.ent b/dtd/JATS-notat1-3.ent
new file mode 100644
index 0000000..1d3af2e
--- /dev/null
+++ b/dtd/JATS-notat1-3.ent
@@ -0,0 +1,412 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Notation Declarations                             -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Notation Declarations v1.3 20210610//EN"
+     Delivered as file "JATS-notat1-3.ent"                         -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    To name all the allowable notations               -->
+<!--                                                               -->
+<!-- CONTAINS:   Notation Declarations                             -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+ Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 16. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+    ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 15. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+     
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 14. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 13. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 12. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 11. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 10. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+  9. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  8. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d3" and "v1.1d3 20150301"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  6. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. OASIS TABLE NAMESPACE MODIFICATIONS - Added a new module
+     that sets up the namespace URI and namespace prefix for
+     the OASIS tables models.
+ 
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+  
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--               NOTATION DECLARATIONS                           -->
+<!-- ============================================================= -->
+
+
+<!--               LATEX (for Mathematics)                         -->
+<!NOTATION  LaTeX  PUBLIC
+           "+//ISBN 3-893-196463::Goosens//NOTATION Der LaTeX Begleiter//DE"  >
+
+
+<!--               TEX (for Mathematics)                           -->
+<!NOTATION  TEX  PUBLIC
+           "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN"  >
+<!NOTATION  tex  PUBLIC
+           "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN"  >
+<!NOTATION  TeX  PUBLIC
+           "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN"  >
+
+
+<!-- ============================================================= -->
+<!--               POTENTIAL NOTATION DECLARATIONS                 -->
+<!-- ============================================================= -->
+
+
+<!--               CGM (Computer Graphics Metafile)                -->
+<!NOTATION cgmchar PUBLIC
+"ISO 8632/2//NOTATION Character encoding//EN"
+                                                                     >
+<!NOTATION cgmclear PUBLIC
+"ISO 8632/4//NOTATION Clear text encoding//EN"
+                                                                     >
+
+
+<!--               GIF (Graphic Interchange Format)                -->
+<!NOTATION gif     PUBLIC
+"-//ISBN 0-7923-9432-1::Graphic Notation//NOTATION CompuServe
+Graphic Interchange Format//EN"
+                                                                     >
+
+<!--               EPS (Adobe's Encapsulate Postscript)            -->
+<!NOTATION eps     PUBLIC
+"+//ISBN 0-201-18127-4::Adobe//NOTATION PostScript Language Reference Manual//EN"
+                                                                     >
+
+
+<!--               JPEG (Joint Photographic Experts Group raster)  -->
+<!NOTATION jpeg    PUBLIC
+"+//ISBN 0-7923-9432-1::Graphic Notation//NOTATION Joint Photographic Experts Group raster//EN"
+                                                                     >
+
+<!--               TIFF (Uncompressed)                             -->
+<!NOTATION tiff    PUBLIC
+"+//ISBN 0-7923-9432-1::Graphic Notation//NOTATION Aldus/Microsoft
+Tagged Interchange File Format//EN"                                  >
+
+
+<!-- ================== End Notation Module ====================== -->
diff --git a/dtd/JATS-para1-3.ent b/dtd/JATS-para1-3.ent
new file mode 100644
index 0000000..256b79c
--- /dev/null
+++ b/dtd/JATS-para1-3.ent
@@ -0,0 +1,648 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Paragraph-Like Elements                           -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Paragraph-Like Elements v1.3 20210610//EN"
+     Delivered as file "JATS-para1-3.ent"                          -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Names structural elements that will appear in     -->
+<!--             the same places as a paragraph                    -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 25. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+ 24. OBJECT ID Added <object-id> to: 
+        <speech>
+
+ 23. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+      
+ 22. ADDED SUBJECTS TO WHEREVER KEYWORDS ALLOWED - Added
+     <subj-group> directly to the following elements:
+      - statement
+  
+ 21. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 20. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 19. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+     
+ 18. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 17. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+ 16. NEW VERSE ATTRIBUTES
+     - Added @indent-level, @style, @style-type, and @style-detail 
+       to <verse-line>
+     - Added @style, @style-type, and @style-detail to <verse-group>      
+    
+ 15. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 14. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 13. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 12. STATEMENT - Added new statement.class inside the model
+     for <statement>, so that statements can be recursive.
+
+ 11. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 10. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+
+
+  9. ABSTRACTS AND KEYWORDS ON NEW STRUCTURES
+     - Added <abstract> (through %abstract.class;) and <kwd-group> 
+       (through %kwd-group.class;) to the following elements:
+        - statement (through statement-model PE)
+   
+     =============================================================
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  4. Updated the DTD-version attribute to "0.4" 
+   
+  3. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  2. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+      - speaker through speaker-atts (both)
+      - statement through statement-atts (@xml:lang only; already
+          @specific-use))
+      - verse-line through verse-line-atts (both)
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    DISPLAY QUOTE ATTRIBUTES                   -->
+<!--                    Attribute list for the <disp-quote> element-->
+<!ENTITY % disp-quote-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PARAGRAPH ATTRIBUTES                       -->
+<!--                    Attribute list for the <p> element         -->
+<!ENTITY % p-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SPEAKER ATTRIBUTES                         -->
+<!--                    Attribute list for the <speaker> element   -->
+<!ENTITY % speaker-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SPEECH ATTRIBUTES                          -->
+<!--                    Attribute list for the <speech> element    -->
+<!ENTITY % speech-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STATEMENT ATTRIBUTES                       -->
+<!--                    Attribute list for the <statement> element -->
+<!ENTITY % statement-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    VERSE GROUP ATTRIBUTES                     -->
+<!--                    Attribute list for the <verse-group> element
+                                                                   -->
+<!ENTITY % verse-group-atts
+            "%jats-common-atts;                                       
+             style      CDATA                             #IMPLIED
+             style-detail
+                        CDATA                             #IMPLIED
+             style-type CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    VERSE LINE ATTRIBUTES                      -->
+<!--                    Attribute list for the <verse-line> element-->
+<!ENTITY % verse-line-atts
+            "%jats-common-atts;                                       
+             indent-level
+                        CDATA                             #IMPLIED
+             style      CDATA                             #IMPLIED
+             style-detail
+                        CDATA                             #IMPLIED
+             style-type CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    PARAGRAPH                                  -->
+<!--                    The basic block-unit of textual information
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=p
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=p
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=p
+                                                                   -->
+<!ELEMENT  p            (#PCDATA %p-elements;)*                      >
+<!ATTLIST  p
+             %p-atts;                                                >
+
+
+<!-- ============================================================= -->
+<!--                    THE REST OF THE PARAGRAPH ELEMENTS         -->
+<!-- ============================================================= -->
+
+
+<!--                    QUOTE, DISPLAYED MODEL                     -->
+<!--                    Content model for the Display Quote element-->
+<!ENTITY % disp-quote-model
+                        "(label?, title?, (%para-level;)*,
+                          (%display-back-matter.class;)* )"          >
+
+
+<!--                    QUOTE, DISPLAYED                           -->
+<!--                    Extract or extended quoted passage from
+                        another work, usually made typographically
+                        distinct from the surrounding text.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=disp-quote
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=disp-quote
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=disp-quote
+                                                                   -->
+<!ELEMENT  disp-quote   %disp-quote-model;                           >
+<!ATTLIST  disp-quote
+             %disp-quote-atts;                                       >
+
+
+<!--                    SPEECH MODEL                               -->
+<!--                    Content model for the <speech> element     -->
+<!ENTITY % speech-model "((%id.class;)*, speaker, 
+                          (%just-para.class;)+ )"                    >
+
+
+<!--                    SPEECH                                     -->
+<!--                    One exchange in a real or imaginary
+                        conversation between two or more entities,
+                        for example, between a an interviewer and the
+                        person being interviewed, between a nurse or
+                        doctor and a patient, between a person and a
+                        computer, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=speech
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=speech
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=speech
+                                                                   -->
+<!ELEMENT  speech       %speech-model;                               >
+<!ATTLIST  speech
+             %speech-atts;                                           >
+
+
+<!--                    SPEAKER ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a speaker.                                 -->
+<!ENTITY % speaker-elements
+                        "| %person-name.class; | %simple-link.class;">
+
+
+<!--                    SPEAKER                                    -->
+<!--                    One who utters a speech as part of a
+                        speech, for example the computer "HAL" in
+                        the exchange 'Hal: "Hi Dave"'.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=speaker
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=speaker
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=speaker
+                                                                   -->
+<!ELEMENT  speaker      (#PCDATA %speaker-elements;)*                >
+<!ATTLIST  speaker
+             %speaker-atts;                                          >
+
+
+<!--                    STATEMENT, FORMAL MODEL                    -->
+<!--                    Content model for the <statement> element  -->
+<!ENTITY % statement-model
+                        "(label?, title?, 
+                          (%abstract.class;)*, 
+                          (%kwd-group.class;)*, (%subj-group.class;)*,
+                          (%just-para.class; | %statement.class;)+,
+                          (%display-back-matter.class;)*)"           >
+
+
+<!--                    STATEMENT, FORMAL                          -->
+<!--                    A Theorem, Lemma, Proof, Postulate,
+                        Hypothesis, Proposition, Corollary, or
+                        other formal statement, identified as such
+                        with a label, usually made typographically
+                        distinct from the surrounding text
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=statement
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=statement
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=statement
+                                                                   -->
+<!ELEMENT  statement    %statement-model;                            >
+<!ATTLIST  statement
+             %statement-atts;                                        >
+
+
+<!--                    VERSE GROUP MODEL                          -->
+<!--                    Content model for the <verse-group> element-->
+<!ENTITY % verse-group-model
+                        "(label?, title?, subtitle?,
+                         (verse-line | verse-group)+,
+                         (%display-back-matter.class;)*) "           >
+
+
+<!--                    VERSE FORM FOR POETRY                      -->
+<!--                    A song, poem, or verse.
+                        Implementor's Note: No attempt has been made
+                        to retain the look or visual form of the
+                        original.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=verse-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=verse-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=verse-group
+                                                                   -->
+<!ELEMENT  verse-group  %verse-group-model;                          >
+<!ATTLIST  verse-group
+             %verse-group-atts;                                      >
+
+
+<!--                    VERSE-LINE ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <verse-line>
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % verse-line-elements
+                        "%simple-text; | %simple-link.class;"        >
+
+
+<!--                    LINE OF A VERSE                            -->
+<!--                    One line of a poem or verse
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=verse-line
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=verse-line
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=verse-line
+                                                                   -->
+<!ELEMENT  verse-line   (#PCDATA %verse-line-elements;)*             >
+<!ATTLIST  verse-line
+             %verse-line-atts;                                       >
+
+
+<!-- ================== End Paragraph Class Module =============== -->
diff --git a/dtd/JATS-phrase1-3.ent b/dtd/JATS-phrase1-3.ent
new file mode 100644
index 0000000..2420ae8
--- /dev/null
+++ b/dtd/JATS-phrase1-3.ent
@@ -0,0 +1,664 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Subject Phrase Class Elements                     -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Subject Phrase Class Elements v1.3 20210610//EN"
+     Delivered as file "JATS-phrase1-3.ent"                        -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the phrase.class, that is, names the      -->
+<!--             inline, subject-specific elements                 -->
+<!--                                                               -->
+<!--             If more specific subject words (such as "gene")   -->
+<!--             are added to later version of this DTD, they      -->
+<!--             should be added to the %phrase.class; entity and  -->
+<!--             defined in this module or in %common.ent;         -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 23. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 22. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 21. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 20. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 19. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+     
+ 18. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 17. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+   
+ 16. STYLED CONTENT - Added new @style-detail attribute to
+     <styled-content>, to account for dots, sesamis, and
+     other non-western emphasis.
+   
+ 15. VOCABULARY/TAXONOMY ATTRIBUTES - Added 4 new attributes for
+     naming (and possibly linking to) a general or controlled
+     taxonomy, vocabulary, index, database or other source of
+     terms: @vocab, @vocab-identifier, @vocab-term, and
+     @vocab-term-identifier
+      - All 4 added to <named-content>, to name a vocabulary 
+        as the source of the content being identified
+ 
+ 14. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 13. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 12. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 11. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 10. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+      
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  9. NAMED CONTENT ATTRIBUTE - Added @rid to the attributes of
+     <named-content>.
+   
+  8. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  7. Updated the DTD-version attribute to "0.4" 
+   
+  6. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  5. MILESTONE END ATTRIBUTES - The new parameter entity
+     %milestone-end-atts; now uses %milestone-atts;, as it used to,
+     for compatibility purposes. This had not been done.
+
+  4. ACCESSIBILITY- Added @alt to
+     - <abbrev> through %abbrev-atts;
+     - <named-content> through %named-content-atts;
+     - <styled-content> through %styled-content-atts:
+
+  3. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+      - abbrev through abbrev-atts (both)
+      - milestone-start through milestone-atts (@xml:lang only;
+           @specific-use already)
+      - milestone-end through milestone-end-atts (both)
+      - named-content through named-content-atts (@xml:lang only;
+           @specific-use already)
+      - styled-content through styled-content-atts (@xml:lang only;
+           @specific-use already)
+
+  2. MILESTONE - The attribute list for <milestone-start> was
+     named milestone-atts not milestone-start-atts. Added the
+     new PE milestone-start-atts, but set it to the value of
+     milestone-atts so as not to break customizations.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    ABBREVIATION ATTRIBUTES                    -->
+<!--                    Attributes for the <abbrev> element        -->
+<!ENTITY % abbrev-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             alt        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    MILESTONE ATTRIBUTES                       -->
+<!--                    Attributes for both the <milestone-start> 
+                        and <milestone-end> elements               -->
+<!ENTITY % milestone-atts
+            "%jats-common-atts;                                       
+             rid        IDREF                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             rationale  CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    MILESTONE START ATTRIBUTES                 -->
+<!--                    Attributes for the <milestone-start>
+                        element                                    -->
+<!ENTITY % milestone-start-atts
+            "%milestone-atts;"                                       >
+
+
+<!--                    MILESTONE END ATTRIBUTES                   -->
+<!--                    Attributes for the <milestone-end>
+                        element                                    -->
+<!ENTITY % milestone-end-atts
+            "%milestone-atts;"                                       >
+
+
+<!--                    NAMED CONTENT ATTRIBUTES                   -->
+<!--                    Attributes for the <named-content> element -->
+<!ENTITY % named-content-atts
+            "%jats-common-atts;                                       
+             rid        IDREFS                            #IMPLIED
+             alt        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #REQUIRED
+             vocab      CDATA                             #IMPLIED
+             vocab-identifier
+                        CDATA                             #IMPLIED
+             vocab-term CDATA                             #IMPLIED
+             vocab-term-identifier
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    STYLED CONTENT ATTRIBUTES                  -->
+<!--                    Attributes for the <styled-content> element-->
+<!ENTITY % styled-content-atts
+            "%jats-common-atts; 
+             toggle     (yes | no)                        #IMPLIED
+             style      CDATA                             #IMPLIED
+             style-type CDATA                             #IMPLIED
+             style-detail
+                        CDATA                             #IMPLIED
+             alt        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    PHRASE-LEVEL ELEMENTS                      -->
+<!-- ============================================================= -->
+
+
+<!--                    ABBREVIATION ELEMENTS                      -->
+<!--                    Elements for use in the <abbrev> element   -->
+<!ENTITY % abbrev-elements
+                        "| %def.class;"                              >
+
+
+<!--                    ABBREVIATION OR ACRONYM                    -->
+<!--                    Used to identify an abbreviation or acronym
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=abbrev
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=abbrev
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=abbrev
+                                                                   -->
+<!ELEMENT  abbrev       (#PCDATA %abbrev-elements;)*                 >
+<!ATTLIST  abbrev
+             %abbrev-atts;                                           >
+
+
+<!-- ============================================================= -->
+<!--                    MILESTONE ELEMENTS                         -->
+<!-- ============================================================= -->
+
+
+<!--                    MILESTONE MODEL                            -->
+<!--                    Model for both the <milestone-start> and
+                        <milestone-end> elements                   -->
+<!ENTITY % milestone-model
+                        "EMPTY"                                      >
+
+
+<!--                    MILESTONE START MODEL                      -->
+<!--                    Model for the both the <milestone-start>
+                        element                                    -->
+<!ENTITY % milestone-start-model
+                        "%milestone-model;"                          >
+
+
+<!--                    MILESTONE START                            -->
+<!--                    Used to mark the start of a non-hierarchically
+                        nested object, that is, a textual component
+                        which cannot be expressed in the normal
+                        non-overlapping, OCHO structure of an XML
+                        document. When this element is used, it is
+                        assumed that the end of the textual
+                        component will be marked with a
+                        <milestone-end> element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=milestone-start
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=milestone-start
+                                                                   -->
+<!ELEMENT  milestone-start
+                        %milestone-start-model;                      >
+<!ATTLIST  milestone-start
+             %milestone-start-atts;                                  >
+
+
+<!--                    MILESTONE END MODEL                        -->
+<!--                    Model for the both the <milestone-end>
+                        element                                    -->
+<!ENTITY % milestone-end-model
+                        "%milestone-model;"                          >
+
+
+<!--                    MILESTONE END                              -->
+<!--                    Used to mark the end of a non-hierarchically
+                        nested object, that is, a textual component
+                        which cannot be expressed in the normal
+                        non-overlapping, OCHO structure of an XML
+                        document. When this element is used, it is
+                        assumed that the start of the textual
+                        component was marked with a <milestone-start>
+                        element.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=milestone-end
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=milestone-end
+                                                                   -->
+<!ELEMENT  milestone-end
+                        %milestone-end-model;                        >
+<!ATTLIST  milestone-end
+             %milestone-end-atts;                                    >
+
+
+<!-- ============================================================= -->
+<!--                    NAMED CONTENT ELEMENTS                     -->
+<!-- ============================================================= -->
+
+
+<!--                    NAMED CONTENT ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <named-content> element                -->
+<!ENTITY % named-content-elements
+                        "| %address-link.class; |
+                         %article-link.class; |
+                         %block-display.class; | %block-math.class;|
+                         %emphasis.class;  |
+                         %inline-display-noalt.class; |
+                         %inline-math.class; | %list.class; |
+                         %math.class; | %phrase.class; |
+                         %simple-link.class; |
+                         %subsup.class; | %rest-of-para.class;"      >
+
+
+<!--                    NAMED SPECIAL (SUBJECT) CONTENT            -->
+<!--                    A semantically distinct word or phrase
+                        within the text. Often such phrases are
+                        treated differently, for example, given a
+                        different typographic style or look, to call
+                        attention to the subject matter. For
+                        example, the word is a drug name or a
+                        gene or the phrase identifies an organism
+                        genus/species.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=named-content
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=named-content
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=named-content
+                                                                   -->
+<!ELEMENT  named-content
+                        (#PCDATA %named-content-elements;)*          >
+<!ATTLIST  named-content
+             %named-content-atts;                                    >
+
+
+<!-- ============================================================= -->
+<!--                    STYLED CONTENT ELEMENTS                    -->
+<!-- ============================================================= -->
+
+
+<!--                    STYLED CONTENT ELEMENTS                    -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <styled-content> element               -->
+<!ENTITY % styled-content-elements
+                        "| %address-link.class; |
+                         %article-link.class; |
+                         %block-display.class; | %block-math.class;|
+                         %emphasis.class; |
+                         %inline-display-noalt.class; |
+                         %inline-math.class; | %list.class; |
+                         %math.class; | %phrase.class; |
+                         %simple-link.class; |
+                         %subsup.class; | %rest-of-para.class;"      >
+
+
+<!--                    STYLED SPECIAL (SUBJECT) CONTENT           -->
+<!--                    A stylistically distinct word or phrase
+                        within the text, that cannot be tagged using
+                        any of the other mechanisms for such content.
+                        In other words: the content cannot be
+                        described with bold, italic, monospace or any
+                        of the other emphasis class elements and
+                        <named-content> is inappropriate because the
+                        semantic reason behind the typographic
+                        distinction is not clear.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=styled-content
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=styled-content
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=styled-content
+                                                                   -->
+<!ELEMENT  styled-content
+                        (#PCDATA %styled-content-elements;)*         >
+<!ATTLIST  styled-content
+             %styled-content-atts;                                   >
+
+
+<!-- ================== End Phrase Class Module ================== -->
diff --git a/dtd/JATS-references1-3.ent b/dtd/JATS-references1-3.ent
new file mode 100644
index 0000000..e0f7685
--- /dev/null
+++ b/dtd/JATS-references1-3.ent
@@ -0,0 +1,1428 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Bibliographic Reference (Citation) Class Elements -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+ 
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Bibliographic Reference (Citation) Class Elements v1.3 20210610//EN"
+Delivered as file "JATS-references1-3.ent"                         -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the bibliographic reference elements      -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 35. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+ 34. OBJECT ID Added <object-id> to: 
+        <ref-list>
+  
+ 33. EXPANSION OF FIXED ATTRIBUTES LIST: There are four   
+     content-defined attributes which are CDATA values 
+     (undetermined) in Archiving, but which are named value 
+     lists in Publishing/Authoring:
+       - @fn-type 
+       - @person-group-type (override is in this module)
+       - @pub-id-type
+       - @ref-type 
+     In order to give users of Publishing and Authoing
+     more flexibility to name new values without 
+     destroying the benefit of named value lists:
+       - A new value “custom” has been added to the named
+           value list of each of these four attributes.
+       - A new attribute @custom-type has been added to
+           each element that takes one of these attributes.
+     The new attribute @custom-type was also added to
+     Green, so that documents valid to Blue or Pumpkin 
+     would also be also valid to Green.
+     In this module:
+      - The element <person-group> was given the new 
+        attribute @custom-type. The value "custom" will be
+        documented as a valid person-group type.
+        As an example: 
+           <person-group @person-group-type=”custom” 
+                         custom-type=”statisticians”>
+     The Best Practice rule (unenforceable in DTDs, but  
+     enforceable in Schematron) is, that if you use the 
+     value “custom” from one of these lists, you should 
+     also record what type of 'custom' in the 
+     @custom-type attribute.
+     
+ 32. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 31. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 30. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 29. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 28. PUB-ID-TYPE - @pub-id-type changed back to a fixed list from 
+     CDATA, reversing the decision of Version 1.2d1. Although 
+     the value list is unchanged, best practice will be documented
+     as using @pub-id-type for type and @assigning-authority
+     for the responsible agency.
+         - <pub-id>
+
+ 27. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 26. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+ 
+ 25. INLINE-GRAPHIC and PRIVATE-CHAR - both <inline-graphic> and
+     <private-char> added to elements allowed in:
+      - <data-title>
+      - <std>
+ 
+ 24. PUB-ID-TYPE - @pub-id-type changed from a fixed list to
+     CDATA for all usages of the attribute. [Rescinded,
+     uses a named value list as before]
+
+ 23. SOURCE/CHAPTER TITLE/PART TITLE - Added the following elements
+     to <source>, <chapter-title>, and <part-title> to more
+     closely mirror the model of <article-title>:
+        - abbrev class
+             abbrev
+        - inline-display class
+             alternatives | inline-graphic | private-char
+        - inline-math class 
+             chem-struct | inline-formula
+        - math class
+             tex-math | mml:math
+        - simple link class
+             fn | target | xref 
+     
+ 22. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 21. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 20. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+ 19. ATTRIBUTES FOR PUB-ID
+   - Added the linking attributes (optional version) to <pub-id> , 
+     so that a <pub-id> that is a DOI, for example, can carry the 
+     linking attributes and be made into a live link. In this use
+     of <pub-id>, the element is acting both as an identifier
+     and as a link.
+   - Added new attribute @assigning-authority to <pub-id>, to
+     carry new values such as "CrossRef" and to take some of the
+     semantic burden off the '@pub-id-type' attribute, when
+     values are organizations such as "Genbank" or "PDB".
+ 
+ 18. VERSION FOR DATASETS - Added new element <version>
+     for citing datasets and software. Similar to <edition>
+     for printed material.
+ 
+ 17. DATA TITLE FOR DATASETS - Added new element <data-title>
+     to name datasets and parts of datasets. Acts both as an
+     <article-title> equivalent and as a <source> equivalent,
+     since many levels of data may be cited.
+
+ 16. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+ 15. ACCESS DATE ELEMENT
+     Added attributes for @calendar and @iso-8601-date. The element is
+     deprecated but still in use.
+
+ 14. NEW <era> ELEMENT
+     Added <era> through date-parts.class to:
+      - <date-in-citation>
+
+ 13. INSTITUTIONS TO STANDARDS ORGANIZATIONS
+     Added the elements <institution-wrap> to the following elements
+     through the institution-wrap.class:
+      - <std-organization>
+
+ 12. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+ 11. EDITION 
+       a) Changed the long name of the <edition> element
+          ("Edition, Cited)") to "Edition Statement, Cited" to
+          indicate that element MAY contain more than just the
+          edition number.
+       b) Changed the definition of <edition> to include the full
+          edition statement and not just the edition number.
+       c) Added new element @designator to hold the edition
+          number, since the definition of edition is changing.
+          (through %edition-atts).
+   
+ 10. DATE IN CITATION ATTRIBUTES - Added to the attributes for
+     <date-in-citation> (through @date-in-citation-atts):
+       a) ISO 8601 standard date format attribute (@iso-8601-date) 
+          Format  YYYY-MM-DDThh:mm:ss 
+       b) Name of the calendar used (@calendar), to hold values
+          such as "Gregorian", "Japanese" (Emperor years), or
+          "Islamic".
+   
+  9. STANDARD ORGANIZATION - Added new element for the name of
+     the standards body that created or that promulgates a
+     standard. <std-organization> may be used as part of the
+     description of a cited standard inside a citation.
+     (New PEs: std-organization-atts; std-organization-elements)
+   
+  8. STANDARD MODEL - Updated the model for <std>, the description
+     of a cited standard in side a citation to include several
+     elements:
+         - <source> contains the name of the standard
+         - <pub-id> contains the standard designator
+         - date elements <month>, <day>, and <year> name the 
+              official date
+         - <std-organization> (new element) names the standards 
+             body
+         - <named-content> takes anything else a publisher/archive 
+             wishes to record, such as the standard status, et al.
+      The following elements were retained form the older model
+      and so will also be allowed inside <std:>
+
+         - <styled-content> because archives cannot always know the
+             reason behind a typographic change
+         - the emphasis elements (all face markup)
+         - <sub> and <sup>
+   
+ 7.  Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  6. Updated the DTD-version attribute to "0.4" 
+   
+  5. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+  4. @SPECIFIC-USE and @XML:LANG - Added the @specific-use and
+     @xml:lang to the following elements:
+      - access-date through access-date-atts (only @specific-use)
+      - annotation through annotation-atts (both)
+      - chapter-title through chapter-title-atts (both) NEW PE
+      - comment through comment-atts (both)
+      - date-in-citation through date-in-citation-atts (both)
+      - edition through edition-atts (both)
+      - gov through gov-atts (both)
+      - note through note-atts (both)
+      - part-title through part-title-atts (both) NEW PE
+      - patent through patent-atts (both)
+      - person-group through person-group-atts (both)
+      - pub-id through pub-id-atts (@specific-use only)
+      - ref through ref-atts (both)
+      - ref-list through ref-list-atts (@specific-use only)
+      - series through series-atts (both)
+      - source through source-atts (@specific-use only;
+          @xml:lang already)
+      - std through std-atts (both)
+      - time-stamp through time-stamp-atts (@specific-use only)
+      - trans-source through trans-source-atts (@specific-use only;
+          @xml:lang already)
+
+  3. PERSON GROUP - Changed the model of <person-group> to mixed
+     content. This entailed: creating new PE %person-group-elements;
+     that contained the elements to be used and Changing PE
+     %person-group-model to (#PCDATA %person-group-elements;)*.
+     The PE person-group-model has been retained in this module for
+     compatibility, but has been set to the mixed model using
+     person-group-elements.
+
+  2. ANNOTATION - Changed to content model to use the parameter
+     entity %annotation-model; Content model unchanged.
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR #PCDATA MODELS      -->
+<!-- ============================================================= -->
+
+
+<!--                    SOURCE ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <source> or <trans-source>.              -->
+<!ENTITY % source-elements
+                        "| %abbrev.class; |
+                         %address-link.class; |%emphasis.class; |
+                         %inline-display.class; |
+                         %inline-math.class; | %math.class; |
+                         %phrase-content.class; | 
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    ACCESS DATE ATTRIBUTES                     -->
+<!--                    Attributes for the <access-date> element   -->
+<!ENTITY % access-date-atts
+            "%jats-common-atts;                                       
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    ANNOTATION ATTRIBUTES                      -->
+<!--                    Attributes for the <annotation> element    -->
+<!ENTITY % annotation-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    CHAPTER TITLE ATTRIBUTES                   -->
+<!--                    Attributes for the <chapter-title> element -->
+<!ENTITY % chapter-title-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    COMMENT ATTRIBUTES                         -->
+<!--                    Attributes for the <comment> element       -->
+<!ENTITY % comment-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DATA TITLE ATTRIBUTES                      -->
+<!--                    Attributes for the <data-title> element    -->
+<!ENTITY % data-title-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    DATE IN CITATION ATTRIBUTES                -->
+<!--                    Attributes for the <date-in-citation>
+                                                         element   -->
+<!ENTITY % date-in-citation-atts
+            "%jats-common-atts;                                       
+             iso-8601-date
+                        CDATA                             #IMPLIED
+             calendar   CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    EDITION ATTRIBUTES                         -->
+<!--                    Attributes for the <edition> element       -->
+<!ENTITY % edition-atts
+            "%jats-common-atts;                                       
+             designator CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    GOVERNMENT ATTRIBUTES                      -->
+<!--                    Attributes for the <gov> element           -->
+<!ENTITY % gov-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    NOTE ATTRIBUTES                            -->
+<!--                    Attributes for the <note> element          -->
+<!ENTITY % note-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PART TITLE ATTRIBUTES                      -->
+<!--                    Attributes for the <part-title> element    -->
+<!ENTITY % part-title-atts
+            "%jats-common-atts;                                       
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PATENT ATTRIBUTES                          -->
+<!--                    Attributes for the <patent> element        -->
+<!ENTITY % patent-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             country    CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PERSON GROUP ATTRIBUTES                    -->
+<!--                    Attributes for the <person-group> element  -->
+<!ENTITY % person-group-atts
+            "%jats-common-atts;                                       
+             person-group-type
+                        CDATA                             #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    PUBLICATION IDENTIFIER ATTRIBUTES          -->
+<!--                    Attributes for the <pub-id> element        -->
+<!ENTITY % pub-id-atts
+            "%jats-common-atts;                                       
+             pub-id-type
+                        (%pub-id-types;)                  #IMPLIED
+             custom-type
+                        CDATA                             #IMPLIED
+             assigning-authority                
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    REFERENCE ATTRIBUTES                       -->
+<!--                    Attributes for the <ref> element           -->
+<!ENTITY % ref-atts
+            "%jats-common-atts;                                       
+              content-type
+                        CDATA                             #IMPLIED
+              specific-use
+                        CDATA                             #IMPLIED
+              xml:lang  NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    REFERENCE LIST ATTRIBUTES                  -->
+<!--                    Attributes for the <ref-list> element      -->
+<!ENTITY % ref-list-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SERIES ATTRIBUTES                          -->
+<!--                    Attributes for the <series> element        -->
+<!ENTITY % series-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    SOURCE ATTRIBUTES                          -->
+<!--                    Attributes for the <source> element        -->
+<!ENTITY % source-atts
+            "%jats-common-atts;                                       
+             content-type
+                       CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STANDARDS ATTRIBUTES                       -->
+<!--                    Attributes for the <std> element           -->
+<!ENTITY % std-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    STANDARDS ORGANIZATION ATTRIBUTES          -->
+<!--                    Attributes for the <std-organization> 
+                        element                                    -->
+<!ENTITY % std-organization-atts
+            "%jats-common-atts;                                       
+             content-type
+                       CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    TIME STAMP ATTRIBUTES                      -->
+<!--                    Attributes for the <time-stamp> element    -->
+<!ENTITY % time-stamp-atts
+            "%jats-common-atts;                                       
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    TRANSLATED SOURCE ATTRIBUTES               -->
+<!--                    Attributes for the <trans-source> element  -->
+<!ENTITY % trans-source-atts
+            "%jats-common-atts;                                       
+             content-type
+                       CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!--                    VERSION ATTRIBUTES                         -->
+<!--                    Attributes for the <version> element       -->
+<!ENTITY % version-atts
+            "%jats-common-atts;                                       
+             designator CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    BIBLIOGRAPHIC REFERENCE LIST ELEMENTS      -->
+<!-- ============================================================= -->
+
+
+<!--ELEM   article-title
+                        Defined in %common.ent;                    -->
+<!--ELEM   collab       Defined in %common.ent;                    -->
+<!--ELEM   conf-date    Defined in %common.ent;                    -->
+<!--ELEM   conf-loc     Defined in %common.ent;                    -->
+<!--ELEM   conf-name    Defined in %common.ent;                    -->
+<!--ELEM   day          Defined in %common.ent;                    -->
+<!--ELEM   elocation-id Defined in %common.ent;                    -->
+<!--ELEM   email        Defined in %common.ent;                    -->
+<!--ELEM   fpage        Defined in %common.ent;                    -->
+<!--ELEM   issn         Defined in %common.ent;                    -->
+<!--ELEM   issn-l       Defined in %common.ent;                    -->
+<!--ELEM   issue        Defined in %common.ent;                    -->
+<!--ELEM   lpage        Defined in %common.ent;                    -->
+<!--ELEM   month        Defined in %common.ent;                    -->
+<!--ELEM   publisher-loc
+                        Defined in %common.ent;                    -->
+<!--ELEM   publisher-name
+                        Defined in %common.ent;                    -->
+<!--ELEM   season       Defined in %common.ent;                    -->
+<!--ELEM   title        Defined in %common.ent;                    -->
+<!--ELEM   trans-title  Defined in %common.ent;                    -->
+<!--ELEM   volume       Defined in %common.ent;                    -->
+<!--ELEM   year         Defined in %common.ent;                    -->
+
+
+<!--                    REFERENCE LIST MODEL                       -->
+<!--                    Content model for the <ref-list> element   -->
+<!ENTITY % ref-list-model
+                        "((%id.class;)*, label?, title?, 
+                          (%para-level;)*, ref*, 
+                          (%ref-list.class;)* )"                     >
+
+
+<!--                    REFERENCE LIST (BIBLIOGRAPHIC REFERENCE LIST)
+                                                                   -->
+<!--                    List of references (citations) for the
+                        article.  Often called "References",
+                        "Bibliography", or "Additional Reading". No
+                        distinction is made between lists of cited
+                        references and lists of suggested references.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ref-list
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ref-list
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ref-list
+                                                                   -->
+<!ELEMENT  ref-list     %ref-list-model;                             >
+<!ATTLIST  ref-list
+             %ref-list-atts;                                         >
+
+
+<!--                    REFERENCE ITEM MODEL                       -->
+<!--                    Content model for the <ref> element        -->
+<!ENTITY % ref-model    "(label?,
+                         (%citation.class; | %note.class;)+ )"       >
+
+
+<!--                    REFERENCE ITEM                             -->
+<!--                    One item in a bibliographic list, typically
+                        a citation describing a referenced work, but
+                        some journals may place notes in this list as
+                        well as citations.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=ref
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=ref
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=ref
+                                                                   -->
+<!ELEMENT  ref          %ref-model;                                  >
+<!ATTLIST  ref
+             %ref-atts;                                              >
+
+
+<!--ELEM   element-citation
+                        Defined in %common.ent;                    -->
+<!--ELEM   mixed-citation
+                        Defined in %common.ent;                    -->
+
+
+<!--                    NOTE IN A REFERENCE LIST MODEL             -->
+<!--                    Content model for a note in a reference
+                        list element                               -->
+<!ENTITY % note-model   "(label?,
+                          (%just-para.class; | %product.class;)+ )"  >
+
+
+<!--                    NOTE IN A REFERENCE LIST                   -->
+<!--                    Used to tag non-citation material that
+                        sometimes within a reference list, for
+                        example, used to tag end note material when
+                        such a note is placed within a reference
+                        list.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=note
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=note
+                                                                   -->
+<!ELEMENT  note         %note-model;                                 >
+<!ATTLIST  note
+             %note-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    BIBLIOGRAPHIC REFERENCE CLASS              -->
+<!-- ============================================================= -->
+
+
+<!--                    ACCESS DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Access Date <access-date> element      -->
+<!ENTITY % access-date-elements
+                        ""                                           >
+
+
+<!--                    ACCESS DATE FOR CITED WORK                 -->
+<!--                    The date on which the work which is cited
+                        was examined. Some online resources are
+                        changing so quickly that a citation to the
+                        resource is not complete without the date
+                        on which the cited resource was examined,
+                        since a day before or a day later the
+                        relevant material might be different.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=access-date
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=access-date
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=access-date
+                                                                   -->
+<!ELEMENT  access-date  (#PCDATA %access-date-elements;)*            >
+<!ATTLIST  access-date
+             %access-date-atts;                                      >
+
+
+<!--                    ANNOTATION MODEL                           -->
+<!--                    The content model for the <annotation>
+                        element                                    -->
+<!ENTITY % annotation-model
+                        "((%just-para.class;)+)"                     >
+
+
+<!--                    ANNOTATION IN A CITATION                   -->
+<!--                    Most citations just provide the bibliographic
+                        information for a cited reference but a few
+                        describe or comment upon the nature or
+                        quality of the reference or summarize its
+                        findings.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=annotation
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=annotation
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=annotation
+                                                                   -->
+<!ELEMENT  annotation   %annotation-model;                           >
+<!ATTLIST  annotation
+             %annotation-atts;                                       >
+
+
+<!--                    CHAPTER TITLE ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <chapter-title> element                -->
+<!ENTITY % chapter-title-elements
+                        "%source-elements;"                          >
+
+
+<!--                    CHAPTER TITLE IN A CITATION                -->
+<!--                    Within a citation (such as a <mixed-citation>
+                        or an <element-citation>), the title of a
+                        cited book is tagged as <source> and the
+                        title of a chapter within that book is tagged
+                        as <chapter-title>.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=chapter-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=chapter-title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=chapter-title
+                                                                   -->
+<!ELEMENT  chapter-title
+                        (#PCDATA %chapter-title-elements;)*          >
+<!ATTLIST  chapter-title
+             %chapter-title-atts;                                    >
+
+
+<!--                    COMMENT ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Comment in a Citation <comment> element.
+                        Design Note: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % comment-elements
+                        "%simple-phrase;"                            >
+
+
+<!--                    COMMENT IN A CITATION                      -->
+<!--                    Used to mark unstructured text within an
+                        otherwise element structured reference.
+                        In an unstructured reference, this text would
+                        merely be data characters.
+                        Typical comments could include:
+                          <comment>[Abstract]</comment>
+                          <comment> translated from Russian</comment>
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=comment
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=comment
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=comment
+                                                                   -->
+<!ELEMENT  comment      (#PCDATA %comment-elements;)*                >
+<!ATTLIST  comment
+             %comment-atts;                                          >
+
+
+<!--                    DATA TITLE ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <data-title>.                            -->
+<!ENTITY % data-title-elements
+                        "| %address-link.class; |      
+                           %inline-display-noalt.class; | 
+                           %emphasis.class; | 
+                           %phrase-content.class; | %subsup.class;"  >
+
+
+<!--                    DATA TITLE IN A CITATION                   -->
+<!--                    Within a citation (such as a <mixed-citation>
+                        or an <element-citation>), the title of a
+                        cited data source such as a dataset or
+                        spreadsheet. 
+                        REMARKS: Since datasets can contain very
+                        complex relationships, for citing data, this 
+                        element may describe different levels, taking
+                        the place of both <article-title> and <source>
+                        when citing data.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=data-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=data-title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=data-title
+                                                                   -->
+<!ELEMENT  data-title
+                        (#PCDATA %data-title-elements;)*             >
+<!ATTLIST  data-title
+             %data-title-atts;                                       >
+
+<!--                    DATE IN CITATION ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Date Inside Citation <date-in-citation>
+                        element                                    -->
+<!ENTITY % date-in-citation-elements
+                        "| %date-parts.class;"                       >
+
+
+<!--                    DATE INSIDE CITATION                       -->
+<!--                    A container element for any date that may be
+                        referenced in a citation, other than the
+                        publication date of the cited work.
+                        The "content-type" attribute should be used
+                        to identify the purpose/type of date. For
+                        example, if the element contains the date
+                        on which the article contributor examined the
+                        cited work, the attribute might be
+                        "access-date".
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=date-in-citation
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=date-in-citation
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=date-in-citation
+                                                                   -->
+<!ELEMENT  date-in-citation
+                        (#PCDATA %date-in-citation-elements;)*       >
+<!ATTLIST  date-in-citation
+             %date-in-citation-atts;                                 >
+
+
+<!--                    EDITION ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <edition>
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % edition-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    EDITION STATEMENT, CITED                   -->
+<!--                    The full edition statement for a cited or
+                        referenced publication. This may include
+                        textual words ("Third print edition revised"),
+                        ordinals ("3rd"), superscripted ordinals
+                        ("3<sup>rd</sup>), or simply the edition number
+                        ("3"). 
+                        Remarks: The @designator attribute may be used
+                        to record the alphabetic or numerical 
+                        edition number.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=edition
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=edition
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=edition
+                                                                   -->
+<!ELEMENT  edition      (#PCDATA %edition-elements;)*                >
+<!ATTLIST  edition
+             %edition-atts;                                          >
+
+
+<!--                    GOVERNMENT REPORT ELEMENTS                 -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <gov>
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % gov-elements "%rendition-plus;"                           >
+
+
+<!--                    GOVERNMENT REPORT, CITED                   -->
+<!--                    The identification information (typically the
+                        title and/or an identification number) for
+                        a cited governmental report or other
+                        government publication
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=gov
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=gov
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=gov
+                                                                   -->
+<!ELEMENT  gov          (#PCDATA %gov-elements;)*                    >
+<!ATTLIST  gov
+             %gov-atts;                                              >
+
+
+<!--                    PART TITLE ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <part-title> element                   -->
+<!ENTITY % part-title-elements
+                        "%source-elements;"                          >
+
+
+<!--                    PART TITLE IN A CITATION                   -->
+<!--                    Within a citation (<mixed-citation>,
+                        <element-citation>), the title of a subpart
+                        of a hierarchical source, for example
+                        when books are divided into Parts, the title 
+                        of the cited Part; for an episode of a TV
+                        show or podcast, the title of the episode,
+                        etc. The top-level source (the name of the
+                        book, TV show, podcast, radio broadcast,
+                        etc.) is tagged as <source>.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=part-title
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=part-title
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=part-title
+                                                                   -->
+<!ELEMENT  part-title   (#PCDATA %part-title-elements;)*             >
+<!ATTLIST  part-title
+             %part-title-atts;                                       >
+
+
+<!--                    PATENT NUMBER ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <patent>
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % patent-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    PATENT NUMBER, CITED                       -->
+<!--                    The identification information (typically the
+                        patent number or number and name) for a
+                        cited patent
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=patent
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=patent
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=patent
+                                                                   -->
+<!ELEMENT  patent       (#PCDATA %patent-elements;)*                 >
+<!ATTLIST  patent
+             %patent-atts;                                           >
+
+
+<!--                    PERSON GROUP ELEMENTS                      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <person-group>                             -->
+<!ENTITY % person-group-elements
+                        "| %name.class; |
+                          %person-group-info.class;"                 >
+
+
+<!--                    PERSON GROUP MODEL                         -->
+<!--                    Content model for the Person Group element -->
+<!ENTITY % person-group-model
+                        "(#PCDATA %person-group-elements;)*"         >
+
+
+<!--                    PERSON GROUP FOR A CITED PUBLICATION       -->
+<!--                    Wrapper element for one or more authors,
+                        editors, translators, etc. named in a cited
+                        reference.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=person-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=person-group
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=person-group
+                                                                   -->
+<!ELEMENT  person-group %person-group-model;                         >
+<!ATTLIST  person-group
+             %person-group-atts;                                     >
+
+
+<!--                    PUBLICATION IDENTIFIER FOR A CITED PUBLICATION
+                                                                   -->
+<!--                    The identifier of a publication such as a
+                        related journal article that is listed
+                        within a citation (such as a <mixed-citation>
+                        or an <element-citation>) inside the
+                        bibliographic reference list <ref-list> of
+                        an article.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=pub-id
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=pub-id
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=pub-id
+                                                                   -->
+<!ELEMENT  pub-id       (#PCDATA)                                    >
+<!ATTLIST  pub-id
+             %pub-id-atts;                                           >
+
+
+<!--                    SERIES ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <series>
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % series-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    SERIES                                     -->
+<!--                    Container element for any series information
+                        used in a citation (such as a <mixed-citation>
+                        or an <element-citation>). For example,
+                        within a citation to a non-journal item that
+                        spans multiple volumes, this element could
+                        contain the unique title of the entire series:
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=series
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=series
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=series
+                                                                   -->
+<!ELEMENT  series       (#PCDATA %series-elements;)*                 >
+<!ATTLIST  series
+             %series-atts;                                           >
+
+
+<!--                    STANDARD ELEMENTS                          -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <std>
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % std-elements "| %emphasis.class; | 
+                           %inline-display-noalt.class; |
+                           %phrase-content.class; | %std.class; | 
+                           %subsup.class;"                           >
+
+
+<!--                    STANDARD, CITED                            -->
+<!--                    The identification information (typically the
+                        standard number, organization, and name) for
+                        a cited standard, where "standard" is defined
+                        as a document produced by a recognized
+                        standards body such ISO, IEEE, OASIS, ANSI,
+                        etc.
+                        The elements that can be used in the mixed
+                        content model of a <std> include:
+                          <source> contains the name of the standard
+                          <pub-id> contains the standard designator
+                          date elements name the official date
+                          <std-organization> names the standards body
+                          <named-content> takes anything else a 
+                            publisher/archive needs.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=std
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=std
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=std
+                                                                   -->
+<!ELEMENT  std          (#PCDATA %std-elements;)*                    >
+<!ATTLIST  std
+             %std-atts;                                              >
+
+
+<!--                    STANDARDS ORGANIZATION ELEMENTS            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <std-organization>.                        -->
+<!ENTITY % std-organization-elements 
+                        "| %emphasis.class; | 
+                         %institution-wrap.class; | %subsup.class;"  >
+
+
+<!--                    STANDARDS ORGANIZATION                     -->
+<!--                    The name of the standards body that created 
+                        or that promulgates a standard, such as
+                        NISO, ISO, ANSI, or industry standards
+                        organizations.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=std-organization
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=std-organization
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=std-organization
+                                                                   -->
+<!ELEMENT  std-organization
+                        (#PCDATA %std-organization-elements;)*       >
+<!ATTLIST  std-organization
+             %std-organization-atts;                                 >
+
+
+<!--                    SOURCE                                     -->
+<!--                    Within a citation, this is the title of a
+                        journal, book, conference proceedings, 
+                        video, podcast, radio blog, or other resource
+                        that is the source of the cited material.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=source
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=source
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=source
+                                                                   -->
+<!ELEMENT  source       (#PCDATA %source-elements;)*                 >
+<!ATTLIST  source
+             %source-atts;                                           >
+
+
+<!--                    TIME STAMP ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <time-stamp>.                            -->
+<!ENTITY % time-stamp-elements
+                        ""                                           >
+
+
+<!--                    TIME STAMP FOR CITED WORK                  -->
+<!--                    Used to record any time stamp that was
+                        found on the cited resource when it was
+                        examined, for resources such as databases
+                        that may use a time signature to identify
+                        different versions.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=time-stamp
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=time-stamp
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=time-stamp
+                                                                   -->
+<!ELEMENT  time-stamp   (#PCDATA %time-stamp-elements;)*             >
+<!ATTLIST  time-stamp
+             %time-stamp-atts;                                       >
+
+
+<!--                    TRANSLATED SOURCE                          -->
+<!--                    Within a citation, this is the title of a
+                        journal, book, conference proceedings, etc.
+                        that is the source of the cited material,
+                        but with the source name given in a different
+                        language from the source as given in the
+                        <source> element. For example, if an article
+                        is originally in French, the <source> name
+                        would be the French name and the
+                        <trans-source> might be in English.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=trans-source
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=trans-source
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=trans-source
+                                                                   -->
+<!ELEMENT  trans-source (#PCDATA %source-elements;)*                 >
+<!ATTLIST  trans-source
+             %trans-source-atts;                                     >
+
+
+<!--                    VERSION ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <version>.
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % version-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    VERSION STATEMENT, CITED                   -->
+<!--                    The version number for a cited dataset or
+                        software package. This is similar to an
+                        edition statement for a publication, in that it
+                        may include textual words ("9th"), superscripted 
+                        ordinals ("3<sup>rd</sup>), or simply the 
+                        version number ("16.2"). 
+                        Remarks: The @designator attribute may be used
+                        to record the alphabetic or numerical 
+                        version number, when the version number contains
+                        more than just a number, so the numeric version
+                        can be preserved for search and comparison.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=version
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=version
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=version
+                                                                   -->
+<!ELEMENT  version      (#PCDATA %version-elements;)*                >
+<!ATTLIST  version
+             %version-atts;                                          >
+
+
+<!-- ================== End Bibliographic Class Module =========== -->
diff --git a/dtd/JATS-related-object1-3.ent b/dtd/JATS-related-object1-3.ent
new file mode 100644
index 0000000..db60620
--- /dev/null
+++ b/dtd/JATS-related-object1-3.ent
@@ -0,0 +1,435 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Related Object Element                            -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          -->
+<!--  DATE:      June 2021                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Related Object Element v1.3 20210610//EN"
+     Delivered as file "JATS-related-object1-3.ent"                -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    Define the element <related-object>. [This        -->
+<!--             module was previously part of the NLM Book Tag Set-->
+<!--             and named bookrelated-object.ent.]                -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             February 2008 (book modules Oct 2006)             -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             The Journal Publishing DTD is built from the      -->
+<!--             Archiving and Interchange DTD Suite.              -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION\CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 20. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+
+ 19. STRING DATE - Used to be added to models using
+     %citation-additions.class;, now added through
+     %references.class; and the same as JATS. Changed:
+       <related-object>
+ 
+ 18. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 17. LANGUAGE OF THE TARGET OBJECT - Added a new optional
+     attribute @hreflang to name the language of the
+     target to which the <related-object> points.
+  
+ 16. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 15. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+     
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 14. 
+     JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 13. BITS "2.0" and "v2.0 20151225" remain unchanged
+      
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 12. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+ 11. JATS became version "1.2d1" and "v1.1d2 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+ 10. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  9. JATS became version "1.1d3" and "v1.1 20150301//EN"
+
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  8. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+   
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  7. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+  
+  6. RELATED-OBJECT ATTRIBUTES - Added the attribute @ext-link-type
+   
+  5. RELATED-OBJECT ATTRIBUTES - Added the linking attribute to
+     <related-object> through the "might-link-atts".
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    RELATED OBJECT ATTRIBUTES                  -->
+<!-- ============================================================= -->
+
+
+<!--                    RELATED OBJECT ATTRIBUTES                  -->
+<!--                    Attributes for <related-object>            -->
+<!ENTITY % related-object-atts
+            "%jats-common-atts;                                       
+             link-type  CDATA                             #IMPLIED
+             ext-link-type
+                        CDATA                             #IMPLIED
+             source-id  CDATA                             #IMPLIED
+             source-id-type
+                        CDATA                             #IMPLIED
+             source-type
+                        CDATA                             #IMPLIED
+             document-id
+                        CDATA                             #IMPLIED
+             document-id-type
+                        CDATA                             #IMPLIED
+             document-type
+                        CDATA                             #IMPLIED
+             object-id  CDATA                             #IMPLIED
+             object-id-type
+                        CDATA                             #IMPLIED
+             object-type
+                        CDATA                             #IMPLIED
+             content-type
+                        CDATA                             #IMPLIED
+             specific-use
+                        CDATA                             #IMPLIED
+             xml:lang   NMTOKEN                           #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!-- ============================================================= -->
+<!--                    RELATED OBJECT ELEMENT                     -->
+<!-- ============================================================= -->
+
+
+<!--                    RELATED OBJECT ELEMENTS                    -->
+<!--                    Elements allowed inside <related-object>   -->
+<!ENTITY % related-object-elements
+                        "| %emphasis.class; |
+                         %phrase-content.class; |
+                         %references.class; |  %subsup.class;"       >
+
+
+<!--                    RELATED OBJECT INFORMATION                 -->
+<!--                    Wrapper element, used as a container for
+                        text links to a related object, possibly
+                        accompanied by a very brief description of
+                        the object, for example a related book, a
+                        related chapter or figure in a book, a
+                        related dataset, etc.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=related-object
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=related-object
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=related-object
+                                                                   -->
+<!ELEMENT  related-object
+                        (#PCDATA %related-object-elements;)*         >
+<!ATTLIST  related-object
+             %related-object-atts;                                   >
+
+
+<!-- ================== End Related Object Element Module ======== -->
diff --git a/dtd/JATS-section1-3.ent b/dtd/JATS-section1-3.ent
new file mode 100644
index 0000000..620df23
--- /dev/null
+++ b/dtd/JATS-section1-3.ent
@@ -0,0 +1,463 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Section Class Elements                            -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          --> 
+<!--  DATE:      June 2021                                         --> 
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite Section Class Elements v1.3 20210610//EN"
+     Delivered as file "JATS-section1-3.ent"                       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->         
+<!--                                                               -->
+<!-- PURPOSE:    Defines the member of the sec.class, that is,     -->
+<!--             names all section-level elements in the           -->
+<!--             JATS DTD Suite                                    -->
+<!--                                                               -->
+<!--             At the time of the initial DTD creation           -->
+<!--             there is only one such element, Section itself    -->
+<!--             <sec>, but future expansion to named sections     -->
+<!--             (such as <methodology> or <materials> or any      -->
+<!--             new section-level structures would be added here. -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for                 -->
+<!--             these purposes.                                   -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 16. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 15. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 14. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 13. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 12. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 11. BITS "2.0" and "v2.0 20151225" remains unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 10. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+  9. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  8. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  7. JATS became version "1.1d3" and "v1.1 20150301//EN"
+ 
+     =============================================================
+     JATS Version 1.1d2              (DAL/BTU) v1.1d2 (2014-09-30)
+   
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d2 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This catalog represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+  6. JATS became version "1.1d2" and "v1.1d2 20140930//EN"
+  
+     =============================================================
+     NISO JATS Version 1.1d1           (DAL/BTU) v1.1 (2013-11-15)
+   
+     ANSI/NISO Z39.96-2012 (pre-release for V1.0 BITS; Version 1.1d1) 
+
+     NISO JATS Standing Committee met and answered the requests and
+     suggestions from the NISO request forms.
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+
+  5. GLOBAL ATTRIBUTES - Added the new parameter entity 
+         %jats-common-atts;
+     to every element in this module. This PE adds (for now) the
+     @id attribute and the @xml:base attribute to every element,
+     whether metadata or narrative.
+     Since the @id in this parameter entity is optional, a second
+     parameter entity jats-common-atts-id-required was also added.
+     The two are kept in sync with the jats-base-atts parameter 
+     entity.
+     This added an attribute list to:
+      - floats-group
+      - sec-meta
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE LISTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    FLOATS GROUP ATTRIBUTES                    -->
+<!--                    Attributes for the <floats-group> element  -->
+<!ENTITY % floats-group-atts
+            "%jats-common-atts;"                                     >
+
+
+<!--                    SECTION ATTRIBUTES                         -->
+<!--                    Attribute list for Section element         -->
+<!ENTITY % sec-atts
+            "%jats-common-atts;                                       
+             xml:lang   NMTOKEN                            #IMPLIED
+             sec-type   CDATA                              #IMPLIED
+             disp-level CDATA                              #IMPLIED
+             specific-use
+                        CDATA                              #IMPLIED" >
+
+
+<!--                    SECTION METADATA ATTRIBUTES                -->
+<!--                    Attributes for the <sec-meta> element      -->
+<!ENTITY % sec-meta-atts
+            "%jats-common-atts;"                                     >
+
+
+<!-- ============================================================= -->
+<!--                    FLOATS GROUP ELEMENTS                      -->
+<!-- ============================================================= -->
+
+
+<!--                    FLOATS GROUP MODEL                         -->
+<!--                    Model for the container element
+                        <floats-group>, which can be used to hold all
+                        the floating elements such as tables and
+                        figures within an <article>.               -->
+<!ENTITY % floats-group-model
+                        "(%floats-display.class;)*"                  >
+
+
+<!--                    FLOATS GROUP                               -->
+<!--                    This container element is just a group to
+                        hold the floating objects that occur within
+                        an article. Some publishers like to
+                        collect all these floating objects (figures,
+                        tables, text boxes, graphics, etc.) together
+                        at the end  rather than interspersing them
+                        throughout the various parts of the document
+                        where they are referenced.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=floats-group
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=floats-group
+                                                                   -->
+<!ELEMENT  floats-group %floats-group-model;                         >
+<!ATTLIST  floats-group
+             %floats-group-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                    SECTION ELEMENTS                           -->
+<!-- ============================================================= -->
+
+
+<!--                    SECTION                                    -->
+<!--                    A headed group of material; the basic
+                        structural unit of the article
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sec
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sec
+                        http://jats.nlm.nih.gov/articleauthoring/tag-library/1.3/index.html?elem=sec
+                                                                   -->
+<!ELEMENT  sec          %sec-model;                                  >
+<!ATTLIST  sec
+             %sec-atts;                                              >
+
+
+<!--                    SECTION METADATA                           -->
+<!--                    In some articles, each section has a different
+                        author or some sections are authored by
+                        different contributors from the enclosing
+                        article. This container element for
+                        section-level metadata is used to capture
+                        information such as those contributors.
+                        Details at:
+                        http://jats.nlm.nih.gov/archiving/tag-library/1.3/index.html?elem=sec-meta
+                        http://jats.nlm.nih.gov/publishing/tag-library/1.3/index.html?elem=sec-meta
+                                                                   -->
+<!ELEMENT  sec-meta     %sec-meta-model;                             >
+<!ATTLIST  sec-meta
+             %sec-meta-atts;                                         >
+
+
+<!-- ================== End Section Class Module ================= -->
diff --git a/dtd/JATS-xmlspecchars1-3.ent b/dtd/JATS-xmlspecchars1-3.ent
new file mode 100644
index 0000000..4657a47
--- /dev/null
+++ b/dtd/JATS-xmlspecchars1-3.ent
@@ -0,0 +1,528 @@
+<!-- ============================================================= -->
+<!--  MODULE:    XML Special Characters Module                     -->
+<!--  VERSION:   ANSI/NISO JATS Version 1.3 (Z39.96-2021)          --> 
+<!--  DATE:      June 2021                                         --> 
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD JATS (Z39.96) JATS DTD Suite XML Special Characters Module v1.3 20210610//EN"
+     Delivered as file "JATS-xmlspecchars1-3.ent"                  -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     JATS DTD Suite                                    -->
+<!--                                                               -->
+<!-- PURPOSE:    External Parameter Entities for calling in the    -->
+<!--             special character entities                        -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             The standard ISO special character entity sets    -->
+<!--             (see below)                                       -->
+<!--                                                               -->
+<!-- TAG SET SPONSOR                                               -->
+<!--             National Center for Biotechnology                 -->
+<!--                Information (NCBI)                             -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             This module was created for the JATS DTD Suite.   -->
+<!--             Digital archives and publishers may use the       -->
+<!--             DTD as is for markup of journal literature or     -->
+<!--             related material for archiving and transferring   -->
+<!--             such material between archives or create a        -->
+<!--             custom XML DTD from the Suite for these purposes. -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the JATS DTD Suite    -->
+<!--                and intend to stay compatible with the suite,  -->
+<!--                then please include the following statement    -->
+<!--                as a comment in all of your DTD modules:       -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the ANSI/NISO Z39.96 Journal Article Tag   -->
+<!--                    Suite (JATS)."                             -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the ANSI/NISO Z39.96 Journal Article -->
+<!--                    Tag Suite (JATS)."                         -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Mulberry Technologies, Inc. for the NISO Z39.96   -->
+<!--             Working Group. Mulberry Technologies was          -->
+<!--             supported by National Center for Biotechnology    -->
+<!--             Information (NCBI), a center of the US National   -->
+<!--             Library of Medicine (NLM).                        -->
+<!--                                                               -->
+<!--             This module is part of the JATS DTD Suite. The    -->
+<!--             Suite is a continuation of work done by NCBI,     -->
+<!--             Mulberry Technologies, and Inera Inc. on the NLM  -->
+<!--             Journal Archiving and Interchange DTD Suite, which-->
+<!--             was originally released in December, 2002.        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  -->
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Inera Inc.'s collaboration with other DTD         -->
+<!--             authors in completing NLM Version 1.0. The        -->
+<!--             Andrew W. Mellon Foundation provided support for  -->
+<!--             these important contributions.                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 jats@ncbi.nlm.nih.gov                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+   ==============================================================
+     JATS Version 1.3 (ANSI/NISO Z39.96-2021)
+                                  (DAL/BTU) v1.3 (2021-06-10)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by both the NISO and ANSI memberships 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on June 10, 2021, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.3 2021 (the version
+     submitted for vote), becoming NISO JATS v1.3 20210610 
+     (ANSI/NISO Z39.96-2019).
+
+     The file names and formal public identifiers have been 
+     changed in the modules and the catalogs.
+
+ 15. JATS 'v1.3d2 20201130' becomes 'v1.3 20210610' 
+     (final ANSI vote date)
+     'ANSI/NISO Z39.96-2019' becomes 'ANSI/NISO Z39.96-2021'
+
+   ==============================================================
+     JATS Version 1.3d2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3d2 (2020-11-30)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting; it is for Standing Committee review and
+     testing. The formal public identifiers have been changed 
+     in the modules and the catalogs.
+ 
+ 14. JATS "v1.3d2 20201130" becomes 'v1.3 20210610' (second 
+     committee draft following the final ANSI/NISO 1.2 vote)
+
+   ==============================================================
+     JATS Version 1.3d1 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.3.d1 (2019-08-31)
+    
+     ANSI NISO JATS is a continuing maintenance NISO Standard, 
+     which requires voting by the NISO and ANSI memberships 
+     to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     of the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+ 13. JATS "1.2" becomes "v1.3d1 20190831" (first committee
+     draft following the final ANSI/NISO vote) 
+
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2021)
+                                   (DAL/BTU) v1.2     (2019-02-08)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI vote on Feb 08, 2019, so it supersedes all Committee 
+     Drafts as well as the draft version JATS 1.2 2018 (the version
+     submitted for vote), becoming NISO JATS v1.2 20190208 
+     (ANSI/NISO Z39.96-2021).
+  
+ 12. JATS "1.2" becomes "v1.2 20190208" (final ANSI vote date)
+     "ANSI/NISO Z39.96-2015" becomes "ANSI/NISO Z39.96-2019"
+     
+   ==============================================================
+     JATS Version 1.2 (ANSI/NISO Z39.96-2018)
+                                   (DAL/BTU) v1.2     (2018-11-30)
+    
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the both the NISO and ANSI membership 
+     to be changed. This version of the NISO JATS was approved 
+     by ANSI and NISO vote, so it supersedes all Committee Drafts
+     and becoming NISO JATS 1.2 (ANSI/NISO Z39.96-2018).
+  
+ 11. JATS "1.2d2" and "v1.2d2 20180401" became
+     JATS "1.2" and "v1.2 20181130" 
+
+    =============================================================
+     JATS Version 1.2d2              (DAL/BTU) v1.2d2  (2018-04-01)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     BITS is under continuous maintenance, and is modified at the
+     discretion of the working group.
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+
+ 10. BITS "2.0" and "v2.0 20151225" remains unchanged
+   
+     JATS "1.2d1" and "v1.2d1 20171231" became
+     JATS "1.2d2" and "v1.2d2 20180401". 
+
+     No module names were changed.
+ 
+    =============================================================
+     JATS Version 1.2d1 (ANSI/NISO Z39.96-2015)
+                                   (DAL/BTU) v1.2d1  (2017-12-31)
+ 
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+  
+  9. JATS "1.2d1" and "v1.2d1 20170631" became
+     JATS "1.2d1" and "v1.2d1 20171231". 
+
+    =============================================================
+     JATS Version 1.2d1              (DAL/BTU) v1.2d1  (2017-06-31)
+
+     NISO JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+      
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee. This draft has not yet been given public review 
+     or voting. The formal public identifiers were changed in the 
+     modules and the catalogs.
+    
+  8. JATS became version "1.2d1" and "v1.2d1 20170631" 
+
+     =============================================================
+     JATS Version 1.1                (DAL/BTU) v1.1  (2015-12-15)
+
+     JATS is a continuing maintenance NISO Standard, which
+     requires voting by the ANSI and NISO memberships to be changed. 
+     JATS 1.1 was approved in late 2015, so the formal public 
+     identifiers were changed in the modules and the catalogs.
+     No model or attribute changes were made at this time. 
+ 
+  7. JATS became version "1.1" and "v1.1 20151215"
+     BITS remained version "2.0" but becomes "v2.0 20151225"
+
+     =============================================================
+     JATS Version 1.1d3             (DAL/BTU) v1.1d3  (2015-03-01)
+   
+     The changes in this release are in response to NISO 
+     License and Indicators Recommended Practice.
+
+     NISO JATS is a continuing maintenance NISO Standard, which 
+     requires voting by the NISO membership to be changed. This
+     Committee Draft 1.1d3 will be sent to the NISO voting
+     membership, to become (if approved) NISO JATS 1.1.
+     
+     This draft DTD represents an interim version of the
+     non-normative JATS DTD Suite, as an indication to JATS users
+     the decisions that have been made by the JATS Standing
+     Committee.
+
+  6. JATS became version "1.1d3" and "v1.1 20150301//EN"
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  5. OASIS TABLE NAMESPACE MODIFICATIONS - Added a new module
+     that sets up the namespace URI and namespace prefix for
+     the OASIS tables models.
+   
+     =============================================================
+     NISO JATS Version 1.0             (DAL/BTU) v1.0 (2012-xx-xx)
+   
+     ANSI/NISO Z39.96-2012 (Version 1.0) 
+
+     Details concerning ANSI/NISO Z39.96-2012 JATS-based DTDs,  
+     XSDs, RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.3d2/
+   
+  4. Updated the DTD-version attribute to "1.0" and the formal
+     public identifier to the date: "v1.0 20120330//EN".
+
+     =============================================================
+     Version 0.4                       (DAL/BTU) v0.4 (2011-01-31)
+   
+     This Tag Set is in the process of becoming a NISO standard.
+     The version numbers are starting over from 0.4", as a Trial
+     Use Draft, to be made into "Version 1.0" when the Tag Suite 
+     becomes a NISO standard. Thus, the version number that would
+     have been "NLM Version 3.1 Draft" has become NISO JATS
+     "Version 0.4".
+
+     Details on NISO Trial Use Draft Version 0.4 are available at
+           http://jats.nlm.nih.gov/JATS-0.4.
+   
+  3. Updated the DTD-version attribute to "0.4" 
+   
+  2. Updated the public identifier to "v0.4 20110131", 
+     modified the formal public identifier to include "JATS (Z39.96)",
+     and the filename as delivered to include "JATS" and the
+     new version number "0".
+
+     =============================================================
+     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
+
+     Version 3.0 is the first non-backward-compatible release.
+     In addition to the usual incremental changes, some
+     elements and attributes have been renamed and/or remodeled
+     to better meet user needs and to increase tag set consistency.
+     All module change histories are available through the Tag Suite
+     web site at http://dtd.nlm.nih.gov.
+
+     Details on version 3.0 are available at
+           http://dtd.nlm.nih.gov/3.0.
+
+  1. Updated public identifier to "v3.0 20071031//EN"              -->
+
+<!-- ============================================================= -->
+<!-- Details concerning 
+     ANSI/NISO Z39.96-2015 JATS-based DTDs, XSDs, 
+     RNGs and supporting documentation are available at
+           http://jats.nlm.nih.gov/1.1/                            -->
+
+<!-- ============================================================= -->
+<!--                    ENTITY SETS FROM INFORMATIVE ANNEX TO      -->
+<!--                       ISO 8879:1986 (SGML)                    -->
+<!-- ============================================================= -->
+
+
+<!--                    ISO STANDARD ADDED LATIN 1                 -->
+<!ENTITY % ISOlat1 PUBLIC
+"-//W3C//ENTITIES Added Latin 1 for MathML 2.0//EN"
+"iso8879/isolat1.ent"                                                >
+
+
+<!--                    ISO STANDARD ADDED LATIN 2                 -->
+<!ENTITY % ISOlat2 PUBLIC
+"-//W3C//ENTITIES Added Latin 2 for MathML 2.0//EN"
+"iso8879/isolat2.ent"                                                >
+
+
+<!--                    ISO BOX AND LINE DRAWING                   -->
+<!ENTITY % ISObox       PUBLIC
+"-//W3C//ENTITIES Box and Line Drawing for MathML 2.0//EN"
+"iso8879/isobox.ent"                                                 >
+
+
+<!--                    ISO STANDARD DIACRITICAL MARKS             -->
+<!ENTITY % ISOdia PUBLIC
+"-//W3C//ENTITIES Diacritical Marks for MathML 2.0//EN"
+"iso8879/isodia.ent"                                                 >
+
+
+<!--                    ISO STANDARD NUMERIC AND SPECIAL GRAPHIC   -->
+<!ENTITY % ISOnum PUBLIC
+"-//W3C//ENTITIES Numeric and Special Graphic for MathML 2.0//EN"
+"iso8879/isonum.ent"                                                 >
+
+
+<!--                    ISO STANDARD PUBLISHING                    -->
+<!ENTITY % ISOpub PUBLIC
+"-//W3C//ENTITIES Publishing for MathML 2.0//EN"
+"iso8879/isopub.ent"                                                 >
+
+
+<!--                    ISO STANDARD RUSSIAN CYRILLIC              -->
+<!ENTITY % ISOcyr1 PUBLIC
+"-//W3C//ENTITIES Russian Cyrillic for MathML 2.0//EN"
+"iso8879/isocyr1.ent"                                                >
+
+
+<!--                    ISO STANDARD NON-RUSSIAN CYRILLIC          -->
+<!ENTITY % ISOcyr2 PUBLIC
+"-//W3C//ENTITIES Non-Russian Cyrillic for MathML 2.0//EN"
+"iso8879/isocyr2.ent"                                                >
+
+
+<!-- ============================================================= -->
+<!--                    ISO 8879 NOT USED BY MATHML                -->
+<!-- ============================================================= -->
+
+
+<!--                    ISO STANDARD GREEK LETTERS                 -->
+<!ENTITY % ISOgrk1 PUBLIC
+"-//W3C//ENTITIES Greek Letters//EN"
+"xmlchars/isogrk1.ent"                                               >
+
+
+<!--                    ISO STANDARD MONOTONIKO GREEK              -->
+<!ENTITY % ISOgrk2 PUBLIC
+"-//W3C//ENTITIES Monotoniko Greek//EN"
+"xmlchars/isogrk2.ent"                                               >
+
+
+<!--                    ISO STANDARD ALTERNATIVE GREEK SYMBOLS     -->
+<!ENTITY % ISOgrk4 PUBLIC
+"-//W3C//ENTITIES Alternative Greek Symbols//EN"
+"xmlchars/isogrk4.ent"                                               >
+
+
+<!-- ============================================================= -->
+<!--                    ISO TECHNICAL REPORT 9573-13 ENTITY SETS   -->
+<!-- ============================================================= -->
+
+
+<!--                    ISO STANDARD GENERAL TECHNICAL             -->
+<!ENTITY % ISOtech PUBLIC
+"-//W3C//ENTITIES General Technical for MathML 2.0//EN"
+"iso9573-13/isotech.ent"                                             >
+
+
+<!--                    ISO STANDARD GREEK SYMBOLS                 -->
+<!ENTITY % ISOgrk3 PUBLIC
+"-//W3C//ENTITIES Greek Symbols for MathML 2.0//EN"
+"iso9573-13/isogrk3.ent"                                             >
+
+
+<!--                    ISO STANDARD MATH ALPHABETS (SCRIPT)       -->
+<!ENTITY % ISOmscr PUBLIC
+"-//W3C//ENTITIES Math Alphabets: Script for MathML 2.0//EN"
+"iso9573-13/isomscr.ent"                                             >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS
+                           (ARROW RELATIONS)                       -->
+<!ENTITY % ISOamsa PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Arrow Relations for MathML 2.0//EN"
+"iso9573-13/isoamsa.ent"                                             >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS
+                           (BINARY OPERATORS)                      -->
+<!ENTITY % ISOamsb PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Binary Operators for MathML 2.0//EN"
+"iso9573-13/isoamsb.ent"                                             >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS
+                           (DELIMITERS)                            -->
+<!ENTITY % ISOamsc PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Delimiters for MathML 2.0//EN"
+"iso9573-13/isoamsc.ent"                                             >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS
+                           (NEGATED RELATIONS)                     -->
+<!ENTITY % ISOamsn PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Negated Relations for MathML 2.0//EN"
+"iso9573-13/isoamsn.ent"                                             >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS (ORDINARY) -->
+<!ENTITY % ISOamso PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Ordinary for MathML 2.0//EN"
+"iso9573-13/isoamso.ent"                                             >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS
+                           (RELATIONS)                             -->
+<!ENTITY % ISOamsr PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Relations for MathML 2.0//EN"
+"iso9573-13/isoamsr.ent"                                             >
+
+
+<!--                    ISO STANDARD MATH ALPHABETS (FRAKTUR)      -->
+<!ENTITY % ISOmfrk PUBLIC
+"-//W3C//ENTITIES Math Alphabets: Fraktur for MathML 2.0//EN"
+"iso9573-13/isomfrk.ent"                                             >
+
+
+<!--                    ISO STANDARD MATH ALPHABETS (OPEN FACE)    -->
+<!ENTITY % ISOmopf PUBLIC
+"-//W3C//ENTITIES Math Alphabets: Open Face for MathML 2.0//EN"
+"iso9573-13/isomopf.ent"                                             >
+
+
+<!-- ============================================================= -->
+<!--                    ISO SPECIAL CHARACTER SETS INVOKED         -->
+<!-- ============================================================= -->
+
+
+%ISOlat1;
+%ISOlat2;
+%ISObox;
+%ISOdia;
+%ISOnum;
+%ISOpub;
+%ISOcyr1;
+%ISOcyr2;
+
+%ISOgrk1;
+%ISOgrk2;
+%ISOgrk4;
+
+%ISOtech;
+%ISOgrk3;
+%ISOamsa;
+%ISOamsb;
+%ISOamsc;
+%ISOamsn;
+%ISOamso;
+%ISOamsr;
+%ISOmscr;
+%ISOmfrk;
+%ISOmopf;
+
+
+<!--                    MAINTENANCE NOTE:
+                        Custom special characters are declared
+                        in a separate module %chars.ent;           -->
+
+
+<!-- ============ End of XML Special Characters Module =========== -->
diff --git a/dtd/MMDB.dtd b/dtd/MMDB.dtd
new file mode 100644
index 0000000..738efa9
--- /dev/null
+++ b/dtd/MMDB.dtd
@@ -0,0 +1,98 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb1.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- MMDB.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/MMDB.mod.dtd b/dtd/MMDB.mod.dtd
new file mode 100644
index 0000000..8424533
--- /dev/null
+++ b/dtd/MMDB.mod.dtd
@@ -0,0 +1,259 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb1.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "MMDB"
+================================================= -->
+
+<!--
+$Revision: 6.1 $
+**********************************************************************
+
+  Biological Macromolecule 3-D Structure Data Types for MMDB,
+                A Molecular Modeling Database
+
+  Definitions for a biomolecular assembly and the MMDB database
+
+  By Hitomi Ohkawa, Jim Ostell, Chris Hogue, and Steve Bryant 
+
+  National Center for Biotechnology Information
+  National Institutes of Health
+  Bethesda, MD 20894 USA
+
+  July 1995
+
+**********************************************************************
+ Contents of the MMDB database are currently based on files distributed by
+ the Protein Data Bank, PDB.  These data are changed in form, as described
+ in this specification. To some extent they are also changed in content, in 
+ that many data items implicit in PDB are made explicit, and others are
+ corrected or omitted as a consequence of validation checks.  The semantics
+ of MMDB data items are indicated by comments within the specification below.
+ These comments explain in detail the manner in which data items from  PDB 
+ have been mapped into MMDB. 
+-->
+
+<!-- Elements used by other modules:
+          Biostruc,
+          Biostruc-id,
+          Biostruc-set,
+          Biostruc-annot-set,
+          Biostruc-residue-graph-set -->
+
+<!-- Elements referenced from other modules:
+          Biostruc-graph,
+          Biomol-descr,
+          Residue-graph FROM MMDB-Chemical-graph,
+          Biostruc-model FROM MMDB-Structural-model,
+          Biostruc-feature-set FROM MMDB-Features,
+          Pub FROM NCBI-Pub,
+          Date,
+          Object-id,
+          Dbtag FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+ A structure report or "biostruc" describes the components of a biomolecular 
+ assembly in terms of their names and descriptions, and a chemical graph 
+ giving atomic formula, connectivity and chirality. It also gives one or more
+ three-dimensional model structures, literally a mapping of the atoms, 
+ residues and/or molecules of each component into a measured three-
+ dimensional space. Structure may also be described by named features, which 
+ associate nodes in the chemical graph, or regions in space, with text or 
+ numeric descriptors.
+ Note that a biostruc may also contain cross references to other databases,
+ including citations to relevant scientific literature. These cross 
+ references use object types from other NCBI data specifications, which are 
+ "imported" into MMDB, and not repeated in this specification. 
+-->
+<!ELEMENT Biostruc (
+        Biostruc_id, 
+        Biostruc_descr?, 
+        Biostruc_chemical-graph, 
+        Biostruc_features?, 
+        Biostruc_model?)>
+
+<!ELEMENT Biostruc_id (Biostruc-id*)>
+
+<!ELEMENT Biostruc_descr (Biostruc-descr*)>
+
+<!ELEMENT Biostruc_chemical-graph (Biostruc-graph)>
+
+<!ELEMENT Biostruc_features (Biostruc-feature-set*)>
+
+<!ELEMENT Biostruc_model (Biostruc-model*)>
+
+<!--
+ A Biostruc-id is a collection identifiers for the molecular assembly.
+ Mmdb-id's are NCBI-assigned, and are intended to be unique and stable 
+ identifiers.  Other-id's are synonyms.
+-->
+<!ELEMENT Biostruc-id (
+        Biostruc-id_mmdb-id | 
+        Biostruc-id_other-database | 
+        Biostruc-id_local-id)>
+
+<!ELEMENT Biostruc-id_mmdb-id (Mmdb-id)>
+
+<!ELEMENT Biostruc-id_other-database (Dbtag)>
+
+<!ELEMENT Biostruc-id_local-id (Object-id)>
+
+
+<!ELEMENT Mmdb-id (%INTEGER;)>
+
+<!--
+ The description of a biostruc refers to both the reported chemical and 
+ spatial structure of a biomolecular assembly.  PDB-derived descriptors
+ which refer specifically to the chemical components or spatial structure
+ are not provided here, but instead as descriptors of the biostruc-graph or 
+ biostruc-model. For PDB-derived structures the biostruc name is the PDB 
+ id-code.  PDB-derived citations appear as publications within the biostruc 
+ description, and include a data-submission citation derived from PDB AUTHOR 
+ records.  Citations are described using the NCBI Pub specification.
+-->
+<!ELEMENT Biostruc-descr (
+        Biostruc-descr_name | 
+        Biostruc-descr_pdb-comment | 
+        Biostruc-descr_other-comment | 
+        Biostruc-descr_history | 
+        Biostruc-descr_attribution)>
+
+<!ELEMENT Biostruc-descr_name (#PCDATA)>
+
+<!ELEMENT Biostruc-descr_pdb-comment (#PCDATA)>
+
+<!ELEMENT Biostruc-descr_other-comment (#PCDATA)>
+<!--
+ The history of a biostruc indicates it's origin and it's update history
+ within MMDB, the NCBI-maintained molecular structure database.  
+-->
+<!ELEMENT Biostruc-descr_history (Biostruc-history)>
+
+<!ELEMENT Biostruc-descr_attribution (Pub)>
+
+<!--
+ The history of a biostruc indicates it's origin and it's update history
+ within MMDB, the NCBI-maintained molecular structure database.  
+-->
+<!ELEMENT Biostruc-history (
+        Biostruc-history_replaces?, 
+        Biostruc-history_replaced-by?, 
+        Biostruc-history_data-source?)>
+
+<!ELEMENT Biostruc-history_replaces (Biostruc-replace)>
+
+<!ELEMENT Biostruc-history_replaced-by (Biostruc-replace)>
+<!--
+ The origin of a biostruc is a reference to another database.  PDB release 
+ date and PDB-assigned id codes are recorded here, as are the PDB-assigned 
+ entry date and replacement history.
+-->
+<!ELEMENT Biostruc-history_data-source (Biostruc-source)>
+
+
+<!ELEMENT Biostruc-replace (
+        Biostruc-replace_id, 
+        Biostruc-replace_date)>
+<!--
+ A Biostruc-id is a collection identifiers for the molecular assembly.
+ Mmdb-id's are NCBI-assigned, and are intended to be unique and stable 
+ identifiers.  Other-id's are synonyms.
+-->
+<!ELEMENT Biostruc-replace_id (Biostruc-id)>
+
+<!ELEMENT Biostruc-replace_date (Date)>
+
+<!--
+ The origin of a biostruc is a reference to another database.  PDB release 
+ date and PDB-assigned id codes are recorded here, as are the PDB-assigned 
+ entry date and replacement history.
+-->
+<!ELEMENT Biostruc-source (
+        Biostruc-source_name-of-database, 
+        Biostruc-source_version-of-database?, 
+        Biostruc-source_database-entry-id, 
+        Biostruc-source_database-entry-date, 
+        Biostruc-source_database-entry-history?)>
+
+<!ELEMENT Biostruc-source_name-of-database (#PCDATA)>
+
+<!ELEMENT Biostruc-source_version-of-database (
+        Biostruc-source_version-of-database_release-date | 
+        Biostruc-source_version-of-database_release-code)>
+
+<!ELEMENT Biostruc-source_version-of-database_release-date (Date)>
+
+<!ELEMENT Biostruc-source_version-of-database_release-code (#PCDATA)>
+<!--
+ A Biostruc-id is a collection identifiers for the molecular assembly.
+ Mmdb-id's are NCBI-assigned, and are intended to be unique and stable 
+ identifiers.  Other-id's are synonyms.
+-->
+<!ELEMENT Biostruc-source_database-entry-id (Biostruc-id)>
+
+<!ELEMENT Biostruc-source_database-entry-date (Date)>
+
+<!ELEMENT Biostruc-source_database-entry-history (Biostruc-source_database-entry-history_E*)>
+
+
+<!ELEMENT Biostruc-source_database-entry-history_E (#PCDATA)>
+
+<!--
+ A biostruc set is a means to collect ASN.1 data for many biostrucs in 
+ one file, as convenient for application programs.  The object type is not
+ inteded to imply similarity of the biostrucs grouped together.
+-->
+<!ELEMENT Biostruc-set (
+        Biostruc-set_id?, 
+        Biostruc-set_descr?, 
+        Biostruc-set_biostrucs)>
+
+<!ELEMENT Biostruc-set_id (Biostruc-id*)>
+
+<!ELEMENT Biostruc-set_descr (Biostruc-descr*)>
+
+<!ELEMENT Biostruc-set_biostrucs (Biostruc*)>
+
+<!--
+ A biostruc annotation set is a means to collect ASN.1 data for biostruc
+ features into one file. The object type is intended as a means to store 
+ feature annotation of similar type, such as "core" definitions for a 
+ threading program, or structure-structure alignments for a structure-
+ similarity browser.
+-->
+<!ELEMENT Biostruc-annot-set (
+        Biostruc-annot-set_id?, 
+        Biostruc-annot-set_descr?, 
+        Biostruc-annot-set_features)>
+
+<!ELEMENT Biostruc-annot-set_id (Biostruc-id*)>
+
+<!ELEMENT Biostruc-annot-set_descr (Biostruc-descr*)>
+
+<!ELEMENT Biostruc-annot-set_features (Biostruc-feature-set*)>
+
+<!--
+ A biostruc residue graph set is a collection of residue graphs.  The object
+ type is intended as a means to record dictionaries containing the chemical
+ subgraphs of "standard" residue types, which are used as a means to 
+ simplify discription of the covalent structure of a biomolecular assembly.
+ The standard residue graph dictionary supplied with the MMDB database 
+ contains 20 standard L amino acids and 8 standard ribonucleotide groups. 
+ These graphs are complete, including explicit hydrogen atoms and separate 
+ instances for the terminal polypeptide and polynucleotide residues. 
+-->
+<!ELEMENT Biostruc-residue-graph-set (
+        Biostruc-residue-graph-set_id?, 
+        Biostruc-residue-graph-set_descr?, 
+        Biostruc-residue-graph-set_residue-graphs)>
+
+<!ELEMENT Biostruc-residue-graph-set_id (Biostruc-id*)>
+
+<!ELEMENT Biostruc-residue-graph-set_descr (Biomol-descr*)>
+
+<!ELEMENT Biostruc-residue-graph-set_residue-graphs (Residue-graph*)>
+
diff --git a/dtd/MMDB_Chemical_graph.dtd b/dtd/MMDB_Chemical_graph.dtd
new file mode 100644
index 0000000..fd56bf7
--- /dev/null
+++ b/dtd/MMDB_Chemical_graph.dtd
@@ -0,0 +1,98 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb1.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- MMDB_Chemical_graph.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/MMDB_Chemical_graph.mod.dtd b/dtd/MMDB_Chemical_graph.mod.dtd
new file mode 100644
index 0000000..5763354
--- /dev/null
+++ b/dtd/MMDB_Chemical_graph.mod.dtd
@@ -0,0 +1,561 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb1.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "MMDB-Chemical-graph"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  Biological Macromolecule 3-D Structure Data Types for MMDB,
+                A Molecular Modeling Database
+
+  Definitions for a chemical graph
+
+  By Hitomi Ohkawa, Jim Ostell, Chris Hogue and Steve Bryant 
+
+  National Center for Biotechnology Information
+  National Institutes of Health
+  Bethesda, MD 20894 USA
+
+  July, 1995
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Biostruc-graph,
+          Biomol-descr,
+          Residue-graph,
+          Molecule-id,
+          PCSubstance-id,
+          Residue-id,
+          Atom-id -->
+
+<!-- Elements referenced from other modules:
+          Pub FROM NCBI-Pub,
+          BioSource FROM NCBI-BioSource,
+          Seq-id FROM NCBI-Seqloc,
+          Biostruc-id FROM MMDB -->
+<!-- ============================================ -->
+
+<!--
+ A biostruc graph contains the complete chemical graph of the biomolecular 
+ assembly.  The assembly graph is defined hierarchically, in terms of 
+ subgraphs graphs of component molecules.  For PDB-derived biostrucs,
+ the molecules forming the assembly are the individual biopolymer chains and 
+ any non-polymer or "heterogen" groups which are present. 
+ The PDB-derived  "compound name" field appears as the name within the
+ biostruc-graph description.  PDB "class" and "source" fields appear as 
+ explicit attributes.  PDB-derived structures are assigned an assembly type 
+ of "other" unless they have been further classified as the "physiological
+ form" or "crystallographic cell" contents.  If they have, the source of the 
+ type classification appears as a citation within the  assembly description. 
+ Note that the biostruc-graph also includes as literals the subgraphs of 
+ any nonstandard residues present within it. For PDB-derived biostrucs these 
+ subgraphs are constructed automatically, with validation as described below.
+-->
+<!ELEMENT Biostruc-graph (
+        Biostruc-graph_descr?, 
+        Biostruc-graph_molecule-graphs, 
+        Biostruc-graph_inter-molecule-bonds?, 
+        Biostruc-graph_residue-graphs?)>
+
+<!ELEMENT Biostruc-graph_descr (Biomol-descr*)>
+
+<!ELEMENT Biostruc-graph_molecule-graphs (Molecule-graph*)>
+
+<!ELEMENT Biostruc-graph_inter-molecule-bonds (Inter-residue-bond*)>
+
+<!ELEMENT Biostruc-graph_residue-graphs (Residue-graph*)>
+
+<!--
+ A biomolecule description refers to the chemical structure of a molecule or 
+ component substructures.  This descriptor type is used at the level of
+ assemblies, molecules and residues, and also for residue-graph dictionaries.
+ The BioSource object type is drawn from NCBI taxonomy data specifications,
+ and is not repeated here.
+-->
+<!ELEMENT Biomol-descr (
+        Biomol-descr_name | 
+        Biomol-descr_pdb-class | 
+        Biomol-descr_pdb-source | 
+        Biomol-descr_pdb-comment | 
+        Biomol-descr_other-comment | 
+        Biomol-descr_organism | 
+        Biomol-descr_attribution | 
+        Biomol-descr_assembly-type | 
+        Biomol-descr_molecule-type)>
+
+<!ELEMENT Biomol-descr_name (#PCDATA)>
+
+<!ELEMENT Biomol-descr_pdb-class (#PCDATA)>
+
+<!ELEMENT Biomol-descr_pdb-source (#PCDATA)>
+
+<!ELEMENT Biomol-descr_pdb-comment (#PCDATA)>
+
+<!ELEMENT Biomol-descr_other-comment (#PCDATA)>
+
+<!ELEMENT Biomol-descr_organism (BioSource)>
+
+<!ELEMENT Biomol-descr_attribution (Pub)>
+
+<!ELEMENT Biomol-descr_assembly-type (%INTEGER;)>
+<!ATTLIST Biomol-descr_assembly-type value (
+        physiological-form |
+        crystallographic-cell |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Biomol-descr_molecule-type (%INTEGER;)>
+<!ATTLIST Biomol-descr_molecule-type value (
+        dna |
+        rna |
+        protein |
+        other-biopolymer |
+        solvent |
+        other-nonpolymer |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ A molecule chemical graph is defined by a sequence of residues.  Nonpolymers
+ are described in the same way, but may contain only a single residue.  
+ Biopolymer molecules are identified within PDB entries according to their
+ appearance on SEQRES records, which formally define a biopolymer as such. 
+ Biopolymers are defined by the distinction between ATOM and HETATM 
+ coordinate records only in cases where the chemical sequence from SEQRES
+ is in conflict with coordinate data. The PDB-assigned chain code appears as 
+ the name within the molecule descriptions of the biopolymers.
+ Nonpolymer molecules from PDB correspond to individual HETEROGEN groups, 
+ excluding any HETEROGEN groups which represent modified biopolymer residues.
+ These molecules are named according to the chain, residue type and residue 
+ number fields as assigned by PDB. Any description appearing in the PDB HET 
+ record appears as a pdb-comment within the molecule description. 
+ Molecule types for PDB-derived molecule graphs are assigned by matching 
+ residue and atom names against the PDB-documented standard types for protein,
+ DNA and RNA, and against residue codes commonly used to indicate solvent.
+ Classification is by "majority rule". If more than half of the residues in
+ a biopolymer are standard groups of one type, then the molecule is of that 
+ type, and otherwise classified as "other". Note that this classification does
+ not preclude the presence of modified residues, but insists they constitute 
+ less than half the biopolymer. Non-polymers are classified only as "solvent"
+ or "other".  
+ Note that a molecule graph may also contain a set of cross references 
+ to biopolymer sequence databases.  All biopolymer molecules in MMDB contain 
+ appropriate identifiers for the corresponding entry in the NCBI-Sequences 
+ database, in particular the NCBI "gi" number, which may be used for sequence
+ retrieval. The Seq-id object type is defined in the NCBI molecular sequence 
+ specification, and not repeated here.
+-->
+<!ELEMENT Molecule-graph (
+        Molecule-graph_id, 
+        Molecule-graph_descr?, 
+        Molecule-graph_seq-id?, 
+        Molecule-graph_residue-sequence, 
+        Molecule-graph_inter-residue-bonds?, 
+        Molecule-graph_sid?)>
+
+<!ELEMENT Molecule-graph_id (Molecule-id)>
+
+<!ELEMENT Molecule-graph_descr (Biomol-descr*)>
+
+<!ELEMENT Molecule-graph_seq-id (Seq-id)>
+
+<!ELEMENT Molecule-graph_residue-sequence (Residue*)>
+
+<!ELEMENT Molecule-graph_inter-residue-bonds (Inter-residue-bond*)>
+<!-- Pubchem substance id -->
+<!ELEMENT Molecule-graph_sid (PCSubstance-id)>
+
+
+<!ELEMENT Molecule-id (%INTEGER;)>
+
+<!-- Pubchem substance id -->
+<!ELEMENT PCSubstance-id (%INTEGER;)>
+
+<!--
+ Residues may be assigned a text-string name as well as an id number. PDB 
+ assigned residue numbers appear as the residue name.
+-->
+<!ELEMENT Residue (
+        Residue_id, 
+        Residue_name?, 
+        Residue_residue-graph)>
+
+<!ELEMENT Residue_id (Residue-id)>
+
+<!ELEMENT Residue_name (#PCDATA)>
+<!--
+ Residue graphs from different sources may be referenced within a molecule
+ graph.  The allowed choices are the nonstandard residue graphs included in 
+ the present biostruc, residue graphs within other biostrucs, or residue 
+ graphs within tables of standard residue definitions.
+-->
+<!ELEMENT Residue_residue-graph (Residue-graph-pntr)>
+
+
+<!ELEMENT Residue-id (%INTEGER;)>
+
+<!--
+ Residue graphs from different sources may be referenced within a molecule
+ graph.  The allowed choices are the nonstandard residue graphs included in 
+ the present biostruc, residue graphs within other biostrucs, or residue 
+ graphs within tables of standard residue definitions.
+-->
+<!ELEMENT Residue-graph-pntr (
+        Residue-graph-pntr_local | 
+        Residue-graph-pntr_biostruc | 
+        Residue-graph-pntr_standard)>
+
+<!ELEMENT Residue-graph-pntr_local (Residue-graph-id)>
+
+<!ELEMENT Residue-graph-pntr_biostruc (Biostruc-graph-pntr)>
+
+<!ELEMENT Residue-graph-pntr_standard (Biostruc-residue-graph-set-pntr)>
+
+
+<!ELEMENT Biostruc-graph-pntr (
+        Biostruc-graph-pntr_biostruc-id, 
+        Biostruc-graph-pntr_residue-graph-id)>
+
+<!ELEMENT Biostruc-graph-pntr_biostruc-id (Biostruc-id)>
+
+<!ELEMENT Biostruc-graph-pntr_residue-graph-id (Residue-graph-id)>
+
+
+<!ELEMENT Biostruc-residue-graph-set-pntr (
+        Biostruc-residue-graph-set-pntr_biostruc-residue-graph-set-id, 
+        Biostruc-residue-graph-set-pntr_residue-graph-id)>
+
+<!ELEMENT Biostruc-residue-graph-set-pntr_biostruc-residue-graph-set-id (Biostruc-id)>
+
+<!ELEMENT Biostruc-residue-graph-set-pntr_residue-graph-id (Residue-graph-id)>
+
+<!--
+ Residue graphs define atomic formulae, connectivity, chirality, and names.
+ For standard residue graphs from the MMDB dictionary the PDB-assigned 
+ residue-type code appears as the name within the residue graph description,
+ and the full trivial name of the residue as a comment within that 
+ description.  For any nonstandard residue graphs provided with an MMDB 
+ biostruc the PDB-assigned residue-type code similarly appears as the name 
+ within the description, and any information provided on PDB HET records as 
+ a pdb-comment within that description.  
+ Note that nonstandard residue graphs for a PDB-derived biostruc may be 
+ incomplete. Current PDB format cannot represent connectivity for groups 
+ which are disordered, and for which no coordinates are given.  In these 
+ cases the residue graph defined in MMDB represents only the subgraph that 
+ could be identified from available ATOM, HETATM and CONECT records.
+-->
+<!ELEMENT Residue-graph (
+        Residue-graph_id, 
+        Residue-graph_descr?, 
+        Residue-graph_residue-type?, 
+        Residue-graph_iupac-code?, 
+        Residue-graph_atoms, 
+        Residue-graph_bonds, 
+        Residue-graph_chiral-centers?)>
+
+<!ELEMENT Residue-graph_id (Residue-graph-id)>
+
+<!ELEMENT Residue-graph_descr (Biomol-descr*)>
+
+<!ELEMENT Residue-graph_residue-type (%INTEGER;)>
+<!ATTLIST Residue-graph_residue-type value (
+        deoxyribonucleotide |
+        ribonucleotide |
+        amino-acid |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Residue-graph_iupac-code (Residue-graph_iupac-code_E*)>
+
+
+<!ELEMENT Residue-graph_iupac-code_E (#PCDATA)>
+
+<!ELEMENT Residue-graph_atoms (Atom*)>
+
+<!ELEMENT Residue-graph_bonds (Intra-residue-bond*)>
+
+<!ELEMENT Residue-graph_chiral-centers (Chiral-center*)>
+
+
+<!ELEMENT Residue-graph-id (%INTEGER;)>
+
+<!--
+ Atoms in residue graphs are defined by elemental symbols and names.  PDB-
+ assigned atom names appear here in the name field, except in cases of known 
+ PDB synonyms.  In these cases atom names are mapped to the names used in the
+ MMDB standard dictionary. This occurs primarily for hydrogen atoms, where 
+ PDB practice allows synonyms for several atom types.  For PDB atoms the 
+ elemental symbol is obtained by parsing the PDB atom name field, allowing 
+ for known special-semantics cases where the atom name does not follow the
+ documented encoding rule.  Ionizable protons are identified within standard 
+ residue graphs in the MMDB dictionary, but not within automatically-defined
+ nonstandard graphs.
+-->
+<!ELEMENT Atom (
+        Atom_id, 
+        Atom_name?, 
+        Atom_iupac-code?, 
+        Atom_element, 
+        Atom_ionizable-proton?)>
+
+<!ELEMENT Atom_id (Atom-id)>
+
+<!ELEMENT Atom_name (#PCDATA)>
+
+<!ELEMENT Atom_iupac-code (Atom_iupac-code_E*)>
+
+
+<!ELEMENT Atom_iupac-code_E (#PCDATA)>
+
+<!ELEMENT Atom_element %ENUM;>
+<!ATTLIST Atom_element value (
+        h |
+        he |
+        li |
+        be |
+        b |
+        c |
+        n |
+        o |
+        f |
+        ne |
+        na |
+        mg |
+        al |
+        si |
+        p |
+        s |
+        cl |
+        ar |
+        k |
+        ca |
+        sc |
+        ti |
+        v |
+        cr |
+        mn |
+        fe |
+        co |
+        ni |
+        cu |
+        zn |
+        ga |
+        ge |
+        as |
+        se |
+        br |
+        kr |
+        rb |
+        sr |
+        y |
+        zr |
+        nb |
+        mo |
+        tc |
+        ru |
+        rh |
+        pd |
+        ag |
+        cd |
+        in |
+        sn |
+        sb |
+        te |
+        i |
+        xe |
+        cs |
+        ba |
+        la |
+        ce |
+        pr |
+        nd |
+        pm |
+        sm |
+        eu |
+        gd |
+        tb |
+        dy |
+        ho |
+        er |
+        tm |
+        yb |
+        lu |
+        hf |
+        ta |
+        w |
+        re |
+        os |
+        ir |
+        pt |
+        au |
+        hg |
+        tl |
+        pb |
+        bi |
+        po |
+        at |
+        rn |
+        fr |
+        ra |
+        ac |
+        th |
+        pa |
+        u |
+        np |
+        pu |
+        am |
+        cm |
+        bk |
+        cf |
+        es |
+        fm |
+        md |
+        no |
+        lr |
+        other |
+        unknown
+        ) #REQUIRED >
+
+
+<!ELEMENT Atom_ionizable-proton %ENUM;>
+<!ATTLIST Atom_ionizable-proton value (
+        true |
+        false |
+        unknown
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Atom-id (%INTEGER;)>
+
+<!--
+ Intra-residue-bond specifies connectivity between atoms in Residue-graph.
+ Unlike Inter-residue-bond defined later, its participating atoms are part of
+ a residue subgraph dictionary, not part of a specific biostruc-graph.
+ For residue graphs in the standard MMDB dictionary bonds are defined from
+ the known chemical structures of amino acids and nucleotides.  For 
+ nonstandard residue graphs bonds are defined from PDB CONECT records, with
+ validation for consistency with coordinate data, and from stereochemical
+ calculation to identify unreported bonds.  Validation and bond identification
+ are based on comparison of inter-atomic distances to the sum of covalent
+ radii for the corresponding elements. 
+-->
+<!ELEMENT Intra-residue-bond (
+        Intra-residue-bond_atom-id-1, 
+        Intra-residue-bond_atom-id-2, 
+        Intra-residue-bond_bond-order?)>
+
+<!ELEMENT Intra-residue-bond_atom-id-1 (Atom-id)>
+
+<!ELEMENT Intra-residue-bond_atom-id-2 (Atom-id)>
+
+<!ELEMENT Intra-residue-bond_bond-order (%INTEGER;)>
+<!ATTLIST Intra-residue-bond_bond-order value (
+        single |
+        partial-double |
+        aromatic |
+        double |
+        triple |
+        other |
+        unknown
+        ) #IMPLIED >
+
+
+<!--
+ Chiral centers are atoms with tetrahedral geometry.  Chirality is defined
+ by a chiral volume involving the chiral center and 3 other atoms bonded to 
+ it.  For any coordinates assigned to atoms c, n1, n2, and n3, the vector 
+ triple product (n1-c) dot ( (n2-c) cross (n3-c) ) must have the indicated
+ sign.  The calculation assumes an orthogonal right-handed coordinate system
+ as is used for MMDB model structures.  
+ Chirality is defined for standard residues in the MMDB dictionary, but is 
+ not assigned automatically for PDB-derived nonstandard residues. If assigned
+ for nonstandard residues, the source of chirality information is described 
+ by a citation within the residue description.
+-->
+<!ELEMENT Chiral-center (
+        Chiral-center_c, 
+        Chiral-center_n1, 
+        Chiral-center_n2, 
+        Chiral-center_n3, 
+        Chiral-center_sign)>
+
+<!ELEMENT Chiral-center_c (Atom-id)>
+
+<!ELEMENT Chiral-center_n1 (Atom-id)>
+
+<!ELEMENT Chiral-center_n2 (Atom-id)>
+
+<!ELEMENT Chiral-center_n3 (Atom-id)>
+
+<!ELEMENT Chiral-center_sign %ENUM;>
+<!ATTLIST Chiral-center_sign value (
+        positive |
+        negative
+        ) #REQUIRED >
+
+
+<!--
+ Inter-residue bonds are defined by a reference to two atoms. For PDB-derived 
+ structures bonds are identified from biopolymer connectivity according to
+ SEQRES and from other connectivity information on SSBOND and CONECT 
+ records. These data are validated and unreported bonds identified by
+ stereochemical calculation, using the same criteria as for intra-residue 
+ bonds.
+-->
+<!ELEMENT Inter-residue-bond (
+        Inter-residue-bond_atom-id-1, 
+        Inter-residue-bond_atom-id-2, 
+        Inter-residue-bond_bond-order?)>
+<!--
+ Atoms, residues and molecules within the current biostruc are referenced 
+ by hierarchical pointers.
+-->
+<!ELEMENT Inter-residue-bond_atom-id-1 (Atom-pntr)>
+<!--
+ Atoms, residues and molecules within the current biostruc are referenced 
+ by hierarchical pointers.
+-->
+<!ELEMENT Inter-residue-bond_atom-id-2 (Atom-pntr)>
+
+<!ELEMENT Inter-residue-bond_bond-order (%INTEGER;)>
+<!ATTLIST Inter-residue-bond_bond-order value (
+        single |
+        partial-double |
+        aromatic |
+        double |
+        triple |
+        other |
+        unknown
+        ) #IMPLIED >
+
+
+<!--
+ Atoms, residues and molecules within the current biostruc are referenced 
+ by hierarchical pointers.
+-->
+<!ELEMENT Atom-pntr (
+        Atom-pntr_molecule-id, 
+        Atom-pntr_residue-id, 
+        Atom-pntr_atom-id)>
+
+<!ELEMENT Atom-pntr_molecule-id (Molecule-id)>
+
+<!ELEMENT Atom-pntr_residue-id (Residue-id)>
+
+<!ELEMENT Atom-pntr_atom-id (Atom-id)>
+
+
+<!ELEMENT Atom-pntr-set (Atom-pntr*)>
+
diff --git a/dtd/MMDB_Features.dtd b/dtd/MMDB_Features.dtd
new file mode 100644
index 0000000..b8eb295
--- /dev/null
+++ b/dtd/MMDB_Features.dtd
@@ -0,0 +1,98 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb3.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- MMDB_Features.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/MMDB_Features.mod.dtd b/dtd/MMDB_Features.mod.dtd
new file mode 100644
index 0000000..160fb02
--- /dev/null
+++ b/dtd/MMDB_Features.mod.dtd
@@ -0,0 +1,932 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb3.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 02/28/2011 23:04:52
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "MMDB-Features"
+================================================= -->
+
+<!--
+$Revision: 240129 $
+**********************************************************************
+
+  Biological Macromolecule 3-D Structure Data Types for MMDB,
+                A Molecular Modeling Database
+
+  Definitions for structural features and biostruc addressing
+
+  By Hitomi Ohkawa, Jim Ostell, Chris Hogue and Steve Bryant 
+
+  National Center for Biotechnology Information
+  National Institutes of Health
+  Bethesda, MD 20894 USA
+
+  July, 1996
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Biostruc-feature-set,
+          Chem-graph-pntrs,
+          Atom-pntrs,
+          Chem-graph-alignment,
+          Chem-graph-interaction,
+          Sphere,
+          Cone,
+          Cylinder,
+          Brick,
+          Transform,
+          Biostruc-feature-set-id,
+          Biostruc-feature-id -->
+
+<!-- Elements referenced from other modules:
+          Biostruc-id FROM MMDB,
+          Molecule-id,
+          Residue-id,
+          Atom-id FROM MMDB-Chemical-graph,
+          Model-id,
+          Model-coordinate-set-id FROM MMDB-Structural-model,
+          User-object FROM NCBI-General,
+          Pub FROM NCBI-Pub -->
+<!-- ============================================ -->
+
+<!--
+ Named model features refer to sets of residues or atoms, or a region in 
+ the model space.  A few specific feature types are allowed for compatibility
+ with PDB usage, but the purpose of a named model feature is simply to
+ associate various types of information with a set of atoms or 
+ residues, or a spatially-defined region of the model structure.  They also
+ support association of various properties with each residue or atom of a
+ set.
+ PDB-derived secondary structure defines a single feature, represented as a
+ sequence of residue motifs, as are the contents of PDB SITE and
+ FTNOTE records.  NCBI-assigned core and secondary structure descriptions
+ are also represented as a sequence of residue motifs.
+-->
+<!ELEMENT Biostruc-feature-set (
+        Biostruc-feature-set_id, 
+        Biostruc-feature-set_descr?, 
+        Biostruc-feature-set_features)>
+
+<!ELEMENT Biostruc-feature-set_id (Biostruc-feature-set-id)>
+
+<!ELEMENT Biostruc-feature-set_descr (Biostruc-feature-set-descr*)>
+
+<!ELEMENT Biostruc-feature-set_features (Biostruc-feature*)>
+
+
+<!ELEMENT Biostruc-feature-set-id (%INTEGER;)>
+
+
+<!ELEMENT Biostruc-feature-set-descr (
+        Biostruc-feature-set-descr_name | 
+        Biostruc-feature-set-descr_pdb-comment | 
+        Biostruc-feature-set-descr_other-comment | 
+        Biostruc-feature-set-descr_attribution)>
+
+<!ELEMENT Biostruc-feature-set-descr_name (#PCDATA)>
+
+<!ELEMENT Biostruc-feature-set-descr_pdb-comment (#PCDATA)>
+
+<!ELEMENT Biostruc-feature-set-descr_other-comment (#PCDATA)>
+
+<!ELEMENT Biostruc-feature-set-descr_attribution (Pub)>
+
+<!--
+ An explicitly specified type in Biostruc-feature allows for
+ efficient extraction and indexing of feature sets of a specific type. 
+ Special types are provided for coloring and rendering, as
+ as needed by molecular graphics programs.
+ new
+-->
+<!ELEMENT Biostruc-feature (
+        Biostruc-feature_id?, 
+        Biostruc-feature_name?, 
+        Biostruc-feature_type?, 
+        Biostruc-feature_property?, 
+        Biostruc-feature_location?)>
+
+<!ELEMENT Biostruc-feature_id (Biostruc-feature-id)>
+
+<!ELEMENT Biostruc-feature_name (#PCDATA)>
+
+<!ELEMENT Biostruc-feature_type (%INTEGER;)>
+
+<!--
+    comment	-  new
+    interaction	-  interaction Data
+    subgraph	-  NCBI domain reserved
+    core	-  user core definition
+    supercore	-  NCBI reserved
+    color	-  new
+    render	-  new
+    label	-  new
+    transform	-  new
+    camera	-  new
+    script	-  for scripts
+    alignment	-  VAST reserved 
+    multalign	-  multiple alignment
+    indirect	-  new
+    cn3dstate	-  Cn3D reserved
+-->
+<!ATTLIST Biostruc-feature_type value (
+        helix |
+        strand |
+        sheet |
+        turn |
+        site |
+        footnote |
+        comment |
+        interaction |
+        subgraph |
+        region |
+        core |
+        supercore |
+        color |
+        render |
+        label |
+        transform |
+        camera |
+        script |
+        alignment |
+        similarity |
+        multalign |
+        indirect |
+        cn3dstate |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Biostruc-feature_property (
+        Biostruc-feature_property_color | 
+        Biostruc-feature_property_render | 
+        Biostruc-feature_property_transform | 
+        Biostruc-feature_property_camera | 
+        Biostruc-feature_property_script | 
+        Biostruc-feature_property_user)>
+
+<!ELEMENT Biostruc-feature_property_color (Color-prop)>
+<!--
+ Note that Render-prop is compatible with the Annmm specification,
+ i.e., its numbering schemes do not clash with those in Render-prop.
+-->
+<!ELEMENT Biostruc-feature_property_render (Render-prop)>
+
+<!ELEMENT Biostruc-feature_property_transform (Transform)>
+<!--
+ The camera is a position relative to the world coordinates
+ of the structure referred to by a location.  
+ this is used to set the initial position of the
+ camera using OpenGL.  scale is the value used to scale the
+ other values from floating point to integer
+-->
+<!ELEMENT Biostruc-feature_property_camera (Camera)>
+<!--
+  When a Biostruc-Feature with a Biostruc-script is initiated,
+  it should play the specified steps one at a time, setting the feature-do
+  list as the active display.
+  The camera can be set using a feature-do, 
+  but it may be moved independently with
+  camera-move, which specifies how to move
+  the camera dynamically during the step along the path defined (e.g.,
+  a zoom, a rotate).
+  Any value of pause (in 1:10th's of a second) will force a pause
+  after an image is shown.
+  If waitevent is TRUE, it will await a mouse or keypress and ignore 
+  the pause value.
+-->
+<!ELEMENT Biostruc-feature_property_script (Biostruc-script)>
+
+<!ELEMENT Biostruc-feature_property_user (User-object)>
+
+<!ELEMENT Biostruc-feature_location (
+        Biostruc-feature_location_subgraph | 
+        Biostruc-feature_location_region | 
+        Biostruc-feature_location_alignment | 
+        Biostruc-feature_location_interaction | 
+        Biostruc-feature_location_similarity | 
+        Biostruc-feature_location_indirect)>
+
+<!ELEMENT Biostruc-feature_location_subgraph (Chem-graph-pntrs)>
+<!--
+ Region motifs describe features defined by spatial location, such as the
+ site specified by a coordinate value, or a rgeion within a bounding volume.
+-->
+<!ELEMENT Biostruc-feature_location_region (Region-pntrs)>
+<!--
+ A biostruc alignment establishes an equivalence of nodes in the chemical
+ graphs of two or more biostrucs. This may be mapped to a sequence
+ alignment in the case of biopolymers.
+ The 'dimension' component indicates the number of participants
+ in the alignment.  For pairwise alignments, such as VAST 
+ structure-structure alignments, the dimension will be always 2, with
+ biostruc-ids, alignment, and domain each containing two entries for an  
+ aligned pair.  The 'alignment' component contains a pair of Chem-graph-pntrs
+ specifying a like number of corresponding residues in each structure.
+ The 'domain' component specifies a region of each structure considered 
+ in the alignment.  Only one transform (for the second structure) and
+ one aligndata (for the pair) are provided for each VAST alignment.
+
+ For multiple alignments, a set of components are treated as
+ parallel arrays of length 'dimension'.
+ The 'transform' component moves each structure to align it with
+ the structure specified as the first element in the "parallel" array,
+ so necessarily the first transform is a NULL transform.
+ Align-stats are placeholders for scores.
+-->
+<!ELEMENT Biostruc-feature_location_alignment (Chem-graph-alignment)>
+
+<!ELEMENT Biostruc-feature_location_interaction (Chem-graph-interaction)>
+<!--
+ A biostruc similarity describes spatial features which are similar between
+ two or more biostrucs.  Similarities are model dependent, and the model and
+ coordinate set ids of the biostrucs must be specified.  They do not 
+ necessarily map to a sequence alignment, as the regions referenced may
+ be pieces of a surface or grid, and thus not uniquely mapable to particular
+ chemical components.
+-->
+<!ELEMENT Biostruc-feature_location_similarity (Region-similarity)>
+<!--
+ Other-feature allows for specifying location via reference to another
+ Biostruc-feature and its location.
+-->
+<!ELEMENT Biostruc-feature_location_indirect (Other-feature)>
+
+<!--
+ Other-feature allows for specifying location via reference to another
+ Biostruc-feature and its location.
+-->
+<!ELEMENT Other-feature (
+        Other-feature_biostruc-id, 
+        Other-feature_set, 
+        Other-feature_feature)>
+
+<!ELEMENT Other-feature_biostruc-id (Biostruc-id)>
+
+<!ELEMENT Other-feature_set (Biostruc-feature-set-id)>
+
+<!ELEMENT Other-feature_feature (Biostruc-feature-id)>
+
+
+<!ELEMENT Biostruc-feature-id (%INTEGER;)>
+
+<!--
+ Atom, residue or molecule motifs describe a substructure defined by a set
+ of nodes from the chemical graph. PDB secondary structure features are
+ described as a residue motif, since they are not associated with any one of
+ the multiple models that may be provided in a PDB file.  NCBI-assigned
+ secondary structure is represented in the same way, even though it is
+ model specific, since this allows for simple mapping of the structural 
+ feature onto a sequence-only representation. This addressing mode may also 
+ be used to describe features to be associated with particular atoms, 
+ as, for example, the chemical shift observed in an NMR experiment.
+-->
+<!ELEMENT Biostruc-molecule-pntr (
+        Biostruc-molecule-pntr_biostruc-id, 
+        Biostruc-molecule-pntr_molecule-id)>
+
+<!ELEMENT Biostruc-molecule-pntr_biostruc-id (Biostruc-id)>
+
+<!ELEMENT Biostruc-molecule-pntr_molecule-id (Molecule-id)>
+
+
+<!ELEMENT Chem-graph-pntrs (
+        Chem-graph-pntrs_atoms | 
+        Chem-graph-pntrs_residues | 
+        Chem-graph-pntrs_molecules)>
+
+<!ELEMENT Chem-graph-pntrs_atoms (Atom-pntrs)>
+
+<!ELEMENT Chem-graph-pntrs_residues (Residue-pntrs)>
+
+<!ELEMENT Chem-graph-pntrs_molecules (Molecule-pntrs)>
+
+
+<!ELEMENT Atom-pntrs (
+        Atom-pntrs_number-of-ptrs, 
+        Atom-pntrs_molecule-ids, 
+        Atom-pntrs_residue-ids, 
+        Atom-pntrs_atom-ids)>
+
+<!ELEMENT Atom-pntrs_number-of-ptrs (%INTEGER;)>
+
+<!ELEMENT Atom-pntrs_molecule-ids (Molecule-id*)>
+
+<!ELEMENT Atom-pntrs_residue-ids (Residue-id*)>
+
+<!ELEMENT Atom-pntrs_atom-ids (Atom-id*)>
+
+
+<!ELEMENT Residue-pntrs (
+        Residue-pntrs_explicit | 
+        Residue-pntrs_interval)>
+
+<!ELEMENT Residue-pntrs_explicit (Residue-explicit-pntrs)>
+
+<!ELEMENT Residue-pntrs_interval (Residue-interval-pntr*)>
+
+
+<!ELEMENT Residue-explicit-pntrs (
+        Residue-explicit-pntrs_number-of-ptrs, 
+        Residue-explicit-pntrs_molecule-ids, 
+        Residue-explicit-pntrs_residue-ids)>
+
+<!ELEMENT Residue-explicit-pntrs_number-of-ptrs (%INTEGER;)>
+
+<!ELEMENT Residue-explicit-pntrs_molecule-ids (Molecule-id*)>
+
+<!ELEMENT Residue-explicit-pntrs_residue-ids (Residue-id*)>
+
+
+<!ELEMENT Residue-interval-pntr (
+        Residue-interval-pntr_molecule-id, 
+        Residue-interval-pntr_from, 
+        Residue-interval-pntr_to)>
+
+<!ELEMENT Residue-interval-pntr_molecule-id (Molecule-id)>
+
+<!ELEMENT Residue-interval-pntr_from (Residue-id)>
+
+<!ELEMENT Residue-interval-pntr_to (Residue-id)>
+
+
+<!ELEMENT Molecule-pntrs (
+        Molecule-pntrs_number-of-ptrs, 
+        Molecule-pntrs_molecule-ids)>
+
+<!ELEMENT Molecule-pntrs_number-of-ptrs (%INTEGER;)>
+
+<!ELEMENT Molecule-pntrs_molecule-ids (Molecule-id*)>
+
+<!--
+ Region motifs describe features defined by spatial location, such as the
+ site specified by a coordinate value, or a rgeion within a bounding volume.
+-->
+<!ELEMENT Region-pntrs (
+        Region-pntrs_model-id, 
+        Region-pntrs_region)>
+
+<!ELEMENT Region-pntrs_model-id (Model-id)>
+
+<!ELEMENT Region-pntrs_region (
+        Region-pntrs_region_site | 
+        Region-pntrs_region_boundary)>
+
+<!ELEMENT Region-pntrs_region_site (Region-coordinates*)>
+
+<!ELEMENT Region-pntrs_region_boundary (Region-boundary*)>
+
+<!--
+ Coordinate sites describe a region in space by reference to individual 
+ coordinates, in a particular model.  These coordinates may be either the
+ x, y and z values of atomic coordinates, the triangles of a surface mesh, 
+ or the grid points of a density model. All are addressed in the same manner,
+ as coordinate indices which give offsets from the beginning of the 
+ coordinate data arrays.  A coordinate-index of 5, for example, refers to 
+ the 5th x, y and z values of an atomic coordinate set, the 5th v1, v2, and v3
+ values of a triangle mesh, or the 5th value in a density grid.
+ PDB SITE and FTNOTE records refer to particular atomic coordinates, and they
+ are represented as a region motif with addresses of type Region-coordinates.
+ Any names or descriptions provided by PDB are thus associated with the
+ indicated sites, in the indicated model. 
+-->
+<!ELEMENT Region-coordinates (
+        Region-coordinates_model-coord-set-id, 
+        Region-coordinates_number-of-coords?, 
+        Region-coordinates_coordinate-indices?)>
+
+<!ELEMENT Region-coordinates_model-coord-set-id (Model-coordinate-set-id)>
+
+<!ELEMENT Region-coordinates_number-of-coords (%INTEGER;)>
+
+<!ELEMENT Region-coordinates_coordinate-indices (Region-coordinates_coordinate-indices_E*)>
+
+
+<!ELEMENT Region-coordinates_coordinate-indices_E (%INTEGER;)>
+
+<!-- Region boundaries are defined by regular solids located in the model space.   -->
+<!ELEMENT Region-boundary (
+        Region-boundary_sphere | 
+        Region-boundary_cone | 
+        Region-boundary_cylinder | 
+        Region-boundary_brick)>
+<!--
+ Geometrical primitives are used in the definition of region motifs, and 
+ also non-atomic coordinates.  Spheres, cones, cylinders and bricks are 
+ defined by a few points in the model space.
+-->
+<!ELEMENT Region-boundary_sphere (Sphere)>
+
+<!ELEMENT Region-boundary_cone (Cone)>
+
+<!ELEMENT Region-boundary_cylinder (Cylinder)>
+<!--
+ A brick is defined by the coordinates of eight corners.  These are assumed
+ to appear in the order 000, 001, 010, 011, 100, 101, 110, 111, where the 
+ digits 0 and 1 refer to respectively to the x, y and z axes of a unit cube.
+ Opposite edges are assumed to be parallel. 
+-->
+<!ELEMENT Region-boundary_brick (Brick)>
+
+<!--
+ A biostruc alignment establishes an equivalence of nodes in the chemical
+ graphs of two or more biostrucs. This may be mapped to a sequence
+ alignment in the case of biopolymers.
+ The 'dimension' component indicates the number of participants
+ in the alignment.  For pairwise alignments, such as VAST 
+ structure-structure alignments, the dimension will be always 2, with
+ biostruc-ids, alignment, and domain each containing two entries for an  
+ aligned pair.  The 'alignment' component contains a pair of Chem-graph-pntrs
+ specifying a like number of corresponding residues in each structure.
+ The 'domain' component specifies a region of each structure considered 
+ in the alignment.  Only one transform (for the second structure) and
+ one aligndata (for the pair) are provided for each VAST alignment.
+
+ For multiple alignments, a set of components are treated as
+ parallel arrays of length 'dimension'.
+ The 'transform' component moves each structure to align it with
+ the structure specified as the first element in the "parallel" array,
+ so necessarily the first transform is a NULL transform.
+ Align-stats are placeholders for scores.
+-->
+<!ELEMENT Chem-graph-alignment (
+        Chem-graph-alignment_dimension?, 
+        Chem-graph-alignment_biostruc-ids, 
+        Chem-graph-alignment_alignment, 
+        Chem-graph-alignment_domain?, 
+        Chem-graph-alignment_transform?, 
+        Chem-graph-alignment_aligndata?)>
+
+<!ELEMENT Chem-graph-alignment_dimension (%INTEGER;)>
+
+<!ELEMENT Chem-graph-alignment_biostruc-ids (Biostruc-id*)>
+
+<!ELEMENT Chem-graph-alignment_alignment (Chem-graph-pntrs*)>
+
+<!ELEMENT Chem-graph-alignment_domain (Chem-graph-pntrs*)>
+
+<!ELEMENT Chem-graph-alignment_transform (Transform*)>
+
+<!ELEMENT Chem-graph-alignment_aligndata (Align-stats*)>
+
+
+<!ELEMENT Chem-graph-interaction (
+        Chem-graph-interaction_type?, 
+        Chem-graph-interaction_distance-threshold?, 
+        Chem-graph-interaction_interactors, 
+        Chem-graph-interaction_residue-contacts?, 
+        Chem-graph-interaction_atom-contacts?, 
+        Chem-graph-interaction_atom-distance?)>
+
+<!ELEMENT Chem-graph-interaction_type (%INTEGER;)>
+<!ATTLIST Chem-graph-interaction_type value (
+        protein-protein |
+        protein-dna |
+        protein-rna |
+        protein-chemical |
+        dna-dna |
+        dna-rna |
+        dna-chemical |
+        rna-rna |
+        rna-chemical |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Chem-graph-interaction_distance-threshold (RealValue)>
+
+<!ELEMENT Chem-graph-interaction_interactors (Biostruc-molecule-pntr*)>
+
+<!ELEMENT Chem-graph-interaction_residue-contacts (Chem-graph-pntrs*)>
+
+<!ELEMENT Chem-graph-interaction_atom-contacts (Chem-graph-pntrs*)>
+
+<!ELEMENT Chem-graph-interaction_atom-distance (RealValue*)>
+
+
+<!ELEMENT Align-stats (
+        Align-stats_descr?, 
+        Align-stats_scale-factor?, 
+        Align-stats_vast-score?, 
+        Align-stats_vast-mlogp?, 
+        Align-stats_align-res?, 
+        Align-stats_rmsd?, 
+        Align-stats_blast-score?, 
+        Align-stats_blast-mlogp?, 
+        Align-stats_other-score?)>
+
+<!ELEMENT Align-stats_descr (#PCDATA)>
+
+<!ELEMENT Align-stats_scale-factor (%INTEGER;)>
+
+<!ELEMENT Align-stats_vast-score (%INTEGER;)>
+
+<!ELEMENT Align-stats_vast-mlogp (%INTEGER;)>
+
+<!ELEMENT Align-stats_align-res (%INTEGER;)>
+
+<!ELEMENT Align-stats_rmsd (%INTEGER;)>
+
+<!ELEMENT Align-stats_blast-score (%INTEGER;)>
+
+<!ELEMENT Align-stats_blast-mlogp (%INTEGER;)>
+
+<!ELEMENT Align-stats_other-score (%INTEGER;)>
+
+<!--
+ A biostruc similarity describes spatial features which are similar between
+ two or more biostrucs.  Similarities are model dependent, and the model and
+ coordinate set ids of the biostrucs must be specified.  They do not 
+ necessarily map to a sequence alignment, as the regions referenced may
+ be pieces of a surface or grid, and thus not uniquely mapable to particular
+ chemical components.
+-->
+<!ELEMENT Region-similarity (
+        Region-similarity_dimension?, 
+        Region-similarity_biostruc-ids, 
+        Region-similarity_similarity, 
+        Region-similarity_transform)>
+
+<!ELEMENT Region-similarity_dimension (%INTEGER;)>
+
+<!ELEMENT Region-similarity_biostruc-ids (Biostruc-id*)>
+
+<!ELEMENT Region-similarity_similarity (Region-pntrs*)>
+
+<!ELEMENT Region-similarity_transform (Transform*)>
+
+<!--
+ Geometrical primitives are used in the definition of region motifs, and 
+ also non-atomic coordinates.  Spheres, cones, cylinders and bricks are 
+ defined by a few points in the model space.
+-->
+<!ELEMENT Sphere (
+        Sphere_center, 
+        Sphere_radius)>
+
+<!ELEMENT Sphere_center (Model-space-point)>
+
+<!ELEMENT Sphere_radius (RealValue)>
+
+
+<!ELEMENT Cone (
+        Cone_axis-top, 
+        Cone_axis-bottom, 
+        Cone_radius-bottom)>
+
+<!ELEMENT Cone_axis-top (Model-space-point)>
+
+<!ELEMENT Cone_axis-bottom (Model-space-point)>
+
+<!ELEMENT Cone_radius-bottom (RealValue)>
+
+
+<!ELEMENT Cylinder (
+        Cylinder_axis-top, 
+        Cylinder_axis-bottom, 
+        Cylinder_radius)>
+
+<!ELEMENT Cylinder_axis-top (Model-space-point)>
+
+<!ELEMENT Cylinder_axis-bottom (Model-space-point)>
+
+<!ELEMENT Cylinder_radius (RealValue)>
+
+<!--
+ A brick is defined by the coordinates of eight corners.  These are assumed
+ to appear in the order 000, 001, 010, 011, 100, 101, 110, 111, where the 
+ digits 0 and 1 refer to respectively to the x, y and z axes of a unit cube.
+ Opposite edges are assumed to be parallel. 
+-->
+<!ELEMENT Brick (
+        Brick_corner-000, 
+        Brick_corner-001, 
+        Brick_corner-010, 
+        Brick_corner-011, 
+        Brick_corner-100, 
+        Brick_corner-101, 
+        Brick_corner-110, 
+        Brick_corner-111)>
+
+<!ELEMENT Brick_corner-000 (Model-space-point)>
+
+<!ELEMENT Brick_corner-001 (Model-space-point)>
+
+<!ELEMENT Brick_corner-010 (Model-space-point)>
+
+<!ELEMENT Brick_corner-011 (Model-space-point)>
+
+<!ELEMENT Brick_corner-100 (Model-space-point)>
+
+<!ELEMENT Brick_corner-101 (Model-space-point)>
+
+<!ELEMENT Brick_corner-110 (Model-space-point)>
+
+<!ELEMENT Brick_corner-111 (Model-space-point)>
+
+
+<!ELEMENT Model-space-point (
+        Model-space-point_scale-factor, 
+        Model-space-point_x, 
+        Model-space-point_y, 
+        Model-space-point_z)>
+
+<!ELEMENT Model-space-point_scale-factor (%INTEGER;)>
+
+<!ELEMENT Model-space-point_x (%INTEGER;)>
+
+<!ELEMENT Model-space-point_y (%INTEGER;)>
+
+<!ELEMENT Model-space-point_z (%INTEGER;)>
+
+
+<!ELEMENT RealValue (
+        RealValue_scale-factor, 
+        RealValue_scaled-integer-value)>
+
+<!ELEMENT RealValue_scale-factor (%INTEGER;)>
+
+<!ELEMENT RealValue_scaled-integer-value (%INTEGER;)>
+
+
+<!ELEMENT Transform (
+        Transform_id, 
+        Transform_moves)>
+
+<!ELEMENT Transform_id (%INTEGER;)>
+
+<!ELEMENT Transform_moves (Move*)>
+
+
+<!ELEMENT Move (
+        Move_rotate | 
+        Move_translate)>
+<!--
+ A rotation matrix is defined by 9 numbers, given by row, i.e.,
+ with column indices varying fastest.
+ Coordinates, as a matrix with columns x, y, an z, are rotated 
+ via multiplication with the rotation matrix. 
+ A translation matrix is defined by 3 numbers, which is added to
+ the rotated coordinates for specified amount of translation. 
+-->
+<!ELEMENT Move_rotate (Rot-matrix)>
+
+<!ELEMENT Move_translate (Trans-matrix)>
+
+<!--
+ A rotation matrix is defined by 9 numbers, given by row, i.e.,
+ with column indices varying fastest.
+ Coordinates, as a matrix with columns x, y, an z, are rotated 
+ via multiplication with the rotation matrix. 
+ A translation matrix is defined by 3 numbers, which is added to
+ the rotated coordinates for specified amount of translation. 
+-->
+<!ELEMENT Rot-matrix (
+        Rot-matrix_scale-factor, 
+        Rot-matrix_rot-11, 
+        Rot-matrix_rot-12, 
+        Rot-matrix_rot-13, 
+        Rot-matrix_rot-21, 
+        Rot-matrix_rot-22, 
+        Rot-matrix_rot-23, 
+        Rot-matrix_rot-31, 
+        Rot-matrix_rot-32, 
+        Rot-matrix_rot-33)>
+
+<!ELEMENT Rot-matrix_scale-factor (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-11 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-12 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-13 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-21 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-22 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-23 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-31 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-32 (%INTEGER;)>
+
+<!ELEMENT Rot-matrix_rot-33 (%INTEGER;)>
+
+
+<!ELEMENT Trans-matrix (
+        Trans-matrix_scale-factor, 
+        Trans-matrix_tran-1, 
+        Trans-matrix_tran-2, 
+        Trans-matrix_tran-3)>
+
+<!ELEMENT Trans-matrix_scale-factor (%INTEGER;)>
+
+<!ELEMENT Trans-matrix_tran-1 (%INTEGER;)>
+
+<!ELEMENT Trans-matrix_tran-2 (%INTEGER;)>
+
+<!ELEMENT Trans-matrix_tran-3 (%INTEGER;)>
+
+<!--
+ The camera is a position relative to the world coordinates
+ of the structure referred to by a location.  
+ this is used to set the initial position of the
+ camera using OpenGL.  scale is the value used to scale the
+ other values from floating point to integer
+-->
+<!ELEMENT Camera (
+        Camera_x, 
+        Camera_y, 
+        Camera_distance, 
+        Camera_angle, 
+        Camera_scale, 
+        Camera_modelview)>
+
+<!ELEMENT Camera_x (%INTEGER;)>
+
+<!ELEMENT Camera_y (%INTEGER;)>
+
+<!ELEMENT Camera_distance (%INTEGER;)>
+
+<!ELEMENT Camera_angle (%INTEGER;)>
+
+<!ELEMENT Camera_scale (%INTEGER;)>
+
+<!ELEMENT Camera_modelview (GL-matrix)>
+
+
+<!ELEMENT GL-matrix (
+        GL-matrix_scale, 
+        GL-matrix_m11, 
+        GL-matrix_m12, 
+        GL-matrix_m13, 
+        GL-matrix_m14, 
+        GL-matrix_m21, 
+        GL-matrix_m22, 
+        GL-matrix_m23, 
+        GL-matrix_m24, 
+        GL-matrix_m31, 
+        GL-matrix_m32, 
+        GL-matrix_m33, 
+        GL-matrix_m34, 
+        GL-matrix_m41, 
+        GL-matrix_m42, 
+        GL-matrix_m43, 
+        GL-matrix_m44)>
+
+<!ELEMENT GL-matrix_scale (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m11 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m12 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m13 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m14 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m21 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m22 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m23 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m24 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m31 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m32 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m33 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m34 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m41 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m42 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m43 (%INTEGER;)>
+
+<!ELEMENT GL-matrix_m44 (%INTEGER;)>
+
+
+<!ELEMENT Color-prop (
+        Color-prop_r?, 
+        Color-prop_g?, 
+        Color-prop_b?, 
+        Color-prop_name?)>
+
+<!ELEMENT Color-prop_r (%INTEGER;)>
+
+<!ELEMENT Color-prop_g (%INTEGER;)>
+
+<!ELEMENT Color-prop_b (%INTEGER;)>
+
+<!ELEMENT Color-prop_name (#PCDATA)>
+
+<!--
+ Note that Render-prop is compatible with the Annmm specification,
+ i.e., its numbering schemes do not clash with those in Render-prop.
+-->
+<!ELEMENT Render-prop (%INTEGER;)>
+
+<!--
+    default	-  Default view
+    wire	-  use wireframe 
+    space	-  use spacefill
+    stick	-  use stick model (thin cylinders)
+    ballNStick	-  use ball & stick model
+    thickWire	-  thicker wireframe
+    hide	-  don't show this
+    name	-  display its name next to it
+    number	-  display its number next to it 
+    pdbNumber	-  display its PDB number next to it
+    objWireFrame	-  display MMDB surface object as wireframe
+    objPolygons	-  display MMDB surface object as polygons   
+    colorsetCPK	-  color atoms like CPK models
+    colorsetbyChain	-  color each chain different
+    colorsetbyTemp	-  color using isotropic Temp factors 
+    colorsetbyRes	-  color using residue properties
+    colorsetbyLen	-  color changes along chain length
+    colorsetbySStru	-  color by secondary structure
+    colorsetbyHydro	-  color by hydrophobicity
+    colorsetbyObject	-  color each object differently
+    colorsetbyDomain	-  color each domain differently
+-->
+<!ATTLIST Render-prop value (
+        default |
+        wire |
+        space |
+        stick |
+        ballNStick |
+        thickWire |
+        hide |
+        name |
+        number |
+        pdbNumber |
+        objWireFrame |
+        objPolygons |
+        colorsetCPK |
+        colorsetbyChain |
+        colorsetbyTemp |
+        colorsetbyRes |
+        colorsetbyLen |
+        colorsetbySStru |
+        colorsetbyHydro |
+        colorsetbyObject |
+        colorsetbyDomain |
+        other
+        ) #IMPLIED >
+
+
+<!--
+  When a Biostruc-Feature with a Biostruc-script is initiated,
+  it should play the specified steps one at a time, setting the feature-do
+  list as the active display.
+  The camera can be set using a feature-do, 
+  but it may be moved independently with
+  camera-move, which specifies how to move
+  the camera dynamically during the step along the path defined (e.g.,
+  a zoom, a rotate).
+  Any value of pause (in 1:10th's of a second) will force a pause
+  after an image is shown.
+  If waitevent is TRUE, it will await a mouse or keypress and ignore 
+  the pause value.
+-->
+<!ELEMENT Biostruc-script (Biostruc-script-step*)>
+
+
+<!ELEMENT Biostruc-script-step (
+        Biostruc-script-step_step-id, 
+        Biostruc-script-step_step-name?, 
+        Biostruc-script-step_feature-do?, 
+        Biostruc-script-step_camera-move?, 
+        Biostruc-script-step_pause?, 
+        Biostruc-script-step_waitevent, 
+        Biostruc-script-step_extra, 
+        Biostruc-script-step_jump?)>
+
+<!ELEMENT Biostruc-script-step_step-id (Step-id)>
+
+<!ELEMENT Biostruc-script-step_step-name (#PCDATA)>
+
+<!ELEMENT Biostruc-script-step_feature-do (Other-feature*)>
+
+<!ELEMENT Biostruc-script-step_camera-move (Transform)>
+
+<!ELEMENT Biostruc-script-step_pause (%INTEGER;)>
+
+<!ELEMENT Biostruc-script-step_waitevent EMPTY>
+<!ATTLIST Biostruc-script-step_waitevent value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Biostruc-script-step_extra (%INTEGER;)>
+
+<!ELEMENT Biostruc-script-step_jump (Step-id)>
+
+
+<!ELEMENT Step-id (%INTEGER;)>
+
diff --git a/dtd/MMDB_Structural_model.dtd b/dtd/MMDB_Structural_model.dtd
new file mode 100644
index 0000000..a5a075e
--- /dev/null
+++ b/dtd/MMDB_Structural_model.dtd
@@ -0,0 +1,98 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb2.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- MMDB_Structural_model.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/MMDB_Structural_model.mod.dtd b/dtd/MMDB_Structural_model.mod.dtd
new file mode 100644
index 0000000..aa9f16c
--- /dev/null
+++ b/dtd/MMDB_Structural_model.mod.dtd
@@ -0,0 +1,676 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mmdb2.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "MMDB-Structural-model"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+**********************************************************************
+
+  Biological Macromolecule 3-D Structure Data Types for MMDB,
+                A Molecular Modeling Database
+
+  Definitions for structural models
+
+  By Hitomi Ohkawa, Jim Ostell, Chris Hogue and Steve Bryant 
+
+  National Center for Biotechnology Information
+  National Institutes of Health
+  Bethesda, MD 20894 USA
+
+  July, 1996
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Biostruc-model,
+          Model-id,
+          Model-coordinate-set-id -->
+
+<!-- Elements referenced from other modules:
+          Chem-graph-pntrs,
+          Atom-pntrs,
+          Chem-graph-alignment,
+          Sphere,
+          Cone,
+          Cylinder,
+          Brick,
+          Transform FROM MMDB-Features,
+          Biostruc-id FROM MMDB,
+          Pub FROM NCBI-Pub -->
+<!-- ============================================ -->
+
+<!--
+ A structural model maps chemical components into a measured three-
+ dimensional space. PDB-derived biostrucs generally contain 4 models, 
+ corresponding to "views" of the structure of a biomolecular assemble with 
+ increasing levels of complexity.  Model types indicate the complexity of the
+ view.  
+ The model named "NCBI all atom" represents a view suitable for most 
+ computational biology applications.  It provides complete atomic coordinate 
+ data for a "single best" model, omitting statistical disorder information 
+ and/or ensemble structure descriptions provided in the source PDB file.  
+ Construction of the single best model is based on the assumption that the 
+ contents of the "alternate conformation" field from pdb imply no correlation
+ among the occupancies of multiple sites assigned to sets of atoms: the best 
+ site is chosen only on the basis of highest occupancy. Note, however, that 
+ alternate conformation sets where correlation is implied are generally 
+ constrained in crystallographic refinement to have uniform occupancy, and 
+ will thus be selected as a set. For ensemble models the model which assigns 
+ coordinates to the most atoms is chosen.  If numbers of coordinates are the 
+ same, the model occurring first in the PDB file is selected.  The single 
+ best model includes complete coordinates for all nonpolymer components, but 
+ omits those classified as "solvent".  Model type is 3 for this model. 
+ The model named "NCBI backbone" represents a simple view intended for 
+ graphic displays and rapid transmission over a network.  It includes only 
+ alpha carbon or backbone phosphate coordinates for biopolymers. It is based 
+ on selection of alpha-carbon and backbone phosphate atoms from the "NCBI
+ all atom" model. The model type is set to 2.  An even simpler model gives 
+ only a cartoon representation, using cylinders corresponding to secondary 
+ structure elements.  This is named "NCBI vector", and has model type 1.
+ The models named "PDB Model 1", "PDB Model 2", etc. represent the complete
+ information provided by PDB, including full descriptions of statistical
+ disorder.  The name of the model is based on the contents of the PDB MODEL
+ record, with a default name of "PDB Model 1" for PDB files which contain 
+ only a single model.  Construction of these models is based on the 
+ assumption that contents of the PDB "alternate conformation" field are 
+ intended to imply correlation among the occupancies of atom sets flagged by
+ the same identifier.  The special flag " " (blank) is assumed to indicate 
+ sites occupied in all alternate conformations, and sites flagged otherwise,
+ together with " ", to indicate a distinct member of an ensemble of 
+ alternate conformations.  Note that construction of ensemble members 
+ according to these assumption requires two validation checks on PDB 
+ "alternate conformation" flags: they must be unique among sites assigned to 
+ the same atom, and that the special " " flag must occur only for unique
+ sites.  Sites which violate the first check are flagged as "u", for 
+ "unknown"; they are omitted from all ensemble definitions but are 
+ nontheless retained in the coordinate list.  Sites which violate the second
+ check are flagged "b" for "blank", and are included in an appropriately
+ named ensemble.  The model type for pdb all models is 4.
+ Note that in the MMDB database models are stored in the ASN.1 stream in
+ order of increasing model type value.  Since models occur as the last item
+ in a biostruc, parsers may avoid reading the entire stream if the desired
+ model is one of the simplified types, which occur first in the stream. This
+ can save considerable I/O time, particularly for large ensemble models from 
+ NMR determinations.
+-->
+<!ELEMENT Biostruc-model (
+        Biostruc-model_id, 
+        Biostruc-model_type, 
+        Biostruc-model_descr?, 
+        Biostruc-model_model-space?, 
+        Biostruc-model_model-coordinates?)>
+
+<!ELEMENT Biostruc-model_id (Model-id)>
+
+<!ELEMENT Biostruc-model_type (Model-type)>
+
+<!ELEMENT Biostruc-model_descr (Model-descr*)>
+<!--
+ The model space defines measurement units and any external reference frame.
+ Coordinates refer to a right-handed orthogonal system defined on axes 
+ tagged x, y and z in the coordinate and feature definitions of a biostruc.
+ Coordinates from PDB-derived structures are reported without change, in
+ angstrom units.  The units of temperature and occupancy factors are not
+ defined explicitly in PDB, but are inferred from their value range.
+-->
+<!ELEMENT Biostruc-model_model-space (Model-space)>
+
+<!ELEMENT Biostruc-model_model-coordinates (Model-coordinate-set*)>
+
+
+<!ELEMENT Model-id (%INTEGER;)>
+
+
+<!ELEMENT Model-type (%INTEGER;)>
+<!ATTLIST Model-type value (
+        ncbi-vector |
+        ncbi-backbone |
+        ncbi-all-atom |
+        pdb-model |
+        other
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Model-descr (
+        Model-descr_name | 
+        Model-descr_pdb-reso | 
+        Model-descr_pdb-method | 
+        Model-descr_pdb-comment | 
+        Model-descr_other-comment | 
+        Model-descr_attribution)>
+
+<!ELEMENT Model-descr_name (#PCDATA)>
+
+<!ELEMENT Model-descr_pdb-reso (#PCDATA)>
+
+<!ELEMENT Model-descr_pdb-method (#PCDATA)>
+
+<!ELEMENT Model-descr_pdb-comment (#PCDATA)>
+
+<!ELEMENT Model-descr_other-comment (#PCDATA)>
+
+<!ELEMENT Model-descr_attribution (Pub)>
+
+<!--
+ The model space defines measurement units and any external reference frame.
+ Coordinates refer to a right-handed orthogonal system defined on axes 
+ tagged x, y and z in the coordinate and feature definitions of a biostruc.
+ Coordinates from PDB-derived structures are reported without change, in
+ angstrom units.  The units of temperature and occupancy factors are not
+ defined explicitly in PDB, but are inferred from their value range.
+-->
+<!ELEMENT Model-space (
+        Model-space_coordinate-units, 
+        Model-space_thermal-factor-units?, 
+        Model-space_occupancy-factor-units?, 
+        Model-space_density-units?, 
+        Model-space_reference-frame?)>
+
+<!ELEMENT Model-space_coordinate-units %ENUM;>
+<!ATTLIST Model-space_coordinate-units value (
+        angstroms |
+        nanometers |
+        other |
+        unknown
+        ) #REQUIRED >
+
+
+<!ELEMENT Model-space_thermal-factor-units %ENUM;>
+<!ATTLIST Model-space_thermal-factor-units value (
+        b |
+        u |
+        other |
+        unknown
+        ) #REQUIRED >
+
+
+<!ELEMENT Model-space_occupancy-factor-units %ENUM;>
+<!ATTLIST Model-space_occupancy-factor-units value (
+        fractional |
+        electrons |
+        other |
+        unknown
+        ) #REQUIRED >
+
+
+<!ELEMENT Model-space_density-units %ENUM;>
+<!ATTLIST Model-space_density-units value (
+        electrons-per-unit-volume |
+        arbitrary-scale |
+        other |
+        unknown
+        ) #REQUIRED >
+
+<!--
+ An external reference frame is a pointer to another biostruc, with an 
+ optional operator to rotate and translate coordinates into its model space.
+ This item is intended for representation of homology-derived model 
+ structures, and is not present for structures from PDB.
+-->
+<!ELEMENT Model-space_reference-frame (Reference-frame)>
+
+<!--
+ An external reference frame is a pointer to another biostruc, with an 
+ optional operator to rotate and translate coordinates into its model space.
+ This item is intended for representation of homology-derived model 
+ structures, and is not present for structures from PDB.
+-->
+<!ELEMENT Reference-frame (
+        Reference-frame_biostruc-id, 
+        Reference-frame_rotation-translation?)>
+
+<!ELEMENT Reference-frame_biostruc-id (Biostruc-id)>
+
+<!ELEMENT Reference-frame_rotation-translation (Transform)>
+
+<!--
+ Atomic coordinates may be assigned literally or by reference to another
+ biostruc.  The reference coordinate type is used to represent homology-
+ derived model structures.  PDB-derived structures have literal coordinates.
+ Referenced coordinates identify another biostruc, any transformation to be 
+ applied to coordinates from that biostruc, and a mapping of the chemical
+ graph of the present biostruc onto that of the referenced biostruc.  They
+ give an "alignment" of atoms in the current biostruc with those in another,
+ from which the coordinates of matched atoms may be retrieved.  For non-
+ atomic models "alignment" may also be represented by molecule and residue
+ equivalence lists.  Referenced coordinates are a data item inteded for 
+ representation of homology models, with an explicit pointer to their source
+ information. They do not occur in PDB-derived models.
+-->
+<!ELEMENT Model-coordinate-set (
+        Model-coordinate-set_id?, 
+        Model-coordinate-set_descr?, 
+        Model-coordinate-set_coordinates)>
+
+<!ELEMENT Model-coordinate-set_id (Model-coordinate-set-id)>
+
+<!ELEMENT Model-coordinate-set_descr (Model-descr*)>
+
+<!ELEMENT Model-coordinate-set_coordinates (
+        Model-coordinate-set_coordinates_literal | 
+        Model-coordinate-set_coordinates_reference)>
+<!--
+ Literal coordinates map chemical components into the model space.  Three 
+ mapping types are allowed, atomic coordinate models, density-grid models,
+ and surface models. A model consists of a sequence of such coordinate sets, 
+ and may thus combine coordinate subsets which have a different source.  
+ PDB-derived models contain a single atomic coordinate set, as they by
+ definition represent information from a single source.
+-->
+<!ELEMENT Model-coordinate-set_coordinates_literal (Coordinates)>
+
+<!ELEMENT Model-coordinate-set_coordinates_reference (Chem-graph-alignment)>
+
+
+<!ELEMENT Model-coordinate-set-id (%INTEGER;)>
+
+<!--
+ Literal coordinates map chemical components into the model space.  Three 
+ mapping types are allowed, atomic coordinate models, density-grid models,
+ and surface models. A model consists of a sequence of such coordinate sets, 
+ and may thus combine coordinate subsets which have a different source.  
+ PDB-derived models contain a single atomic coordinate set, as they by
+ definition represent information from a single source.
+-->
+<!ELEMENT Coordinates (
+        Coordinates_atomic | 
+        Coordinates_surface | 
+        Coordinates_density)>
+<!--
+ Literal atomic coordinate values give location, occupancy and order
+ parameters, and a pointer to a specific atom defined in the biostruc graph.
+ Temperature and occupancy factors have their conventional crystallographic
+ definitions, with units defined in the model space declaration.  Atoms,
+ sites, temperature-factors, occupancies and alternate-conformation-ids
+ are parallel arrays, i.e. the have the same number of values as given by
+ number-of-points. Conformation ensembles represent distinct correlated-
+ disorder subsets of the coordinates.  They will be present only for certain 
+ "views" of PDB structures, as described above. Their derivation from PDB-
+ supplied "alternate-conformation" ids is described below. 
+-->
+<!ELEMENT Coordinates_atomic (Atomic-coordinates)>
+<!--
+ Literal surface coordinates define the chemical components whose structure
+ is described by a surface, and the surface itself.  The surface may be
+ either a regular geometric solid or a triangle-mesh of arbitrary shape.
+-->
+<!ELEMENT Coordinates_surface (Surface-coordinates)>
+<!--
+ Literal density coordinates define the chemical components whose structure
+ is described by a density grid, parameters of this grid, and density values.
+-->
+<!ELEMENT Coordinates_density (Density-coordinates)>
+
+<!--
+ Literal atomic coordinate values give location, occupancy and order
+ parameters, and a pointer to a specific atom defined in the biostruc graph.
+ Temperature and occupancy factors have their conventional crystallographic
+ definitions, with units defined in the model space declaration.  Atoms,
+ sites, temperature-factors, occupancies and alternate-conformation-ids
+ are parallel arrays, i.e. the have the same number of values as given by
+ number-of-points. Conformation ensembles represent distinct correlated-
+ disorder subsets of the coordinates.  They will be present only for certain 
+ "views" of PDB structures, as described above. Their derivation from PDB-
+ supplied "alternate-conformation" ids is described below. 
+-->
+<!ELEMENT Atomic-coordinates (
+        Atomic-coordinates_number-of-points, 
+        Atomic-coordinates_atoms, 
+        Atomic-coordinates_sites, 
+        Atomic-coordinates_temperature-factors?, 
+        Atomic-coordinates_occupancies?, 
+        Atomic-coordinates_alternate-conf-ids?, 
+        Atomic-coordinates_conf-ensembles?)>
+
+<!ELEMENT Atomic-coordinates_number-of-points (%INTEGER;)>
+
+<!ELEMENT Atomic-coordinates_atoms (Atom-pntrs)>
+<!--
+ The atoms whose location is described by each coordinate are identified
+ via a hierarchical pointer to the chemical graph of the biomolecular
+ assembly.  Coordinates may be matched with atoms in the chemical structure
+ by the values of the molecule, residue and atom id's given here,  which 
+ match exactly the items of the same type defined in Biostruc-graph.
+ Coordinates are given as integer values, with a scale factor to convert 
+ to real values for each x, y or z, in the units indicated in model-space.
+ Integer values must be divided by the the scale factor.  This use of integer
+ values reduces the ASN.1 stream size. The scale factors for temperature 
+ factors and occupancies are given separately, but must be used in the same 
+ fashion to produce properly scaled real values.
+-->
+<!ELEMENT Atomic-coordinates_sites (Model-space-points)>
+
+<!ELEMENT Atomic-coordinates_temperature-factors (Atomic-temperature-factors)>
+
+<!ELEMENT Atomic-coordinates_occupancies (Atomic-occupancies)>
+<!--
+ An alternate conformation id is optionally associated with each coordinate. 
+ Aside from corrections due to the validation checks described above, the 
+ contents of MMDB Alternate-conformation-ids are identical to the PDB 
+ "alternate conformation" field.
+-->
+<!ELEMENT Atomic-coordinates_alternate-conf-ids (Alternate-conformation-ids)>
+
+<!ELEMENT Atomic-coordinates_conf-ensembles (Conformation-ensemble*)>
+
+<!--
+ The atoms whose location is described by each coordinate are identified
+ via a hierarchical pointer to the chemical graph of the biomolecular
+ assembly.  Coordinates may be matched with atoms in the chemical structure
+ by the values of the molecule, residue and atom id's given here,  which 
+ match exactly the items of the same type defined in Biostruc-graph.
+ Coordinates are given as integer values, with a scale factor to convert 
+ to real values for each x, y or z, in the units indicated in model-space.
+ Integer values must be divided by the the scale factor.  This use of integer
+ values reduces the ASN.1 stream size. The scale factors for temperature 
+ factors and occupancies are given separately, but must be used in the same 
+ fashion to produce properly scaled real values.
+-->
+<!ELEMENT Model-space-points (
+        Model-space-points_scale-factor, 
+        Model-space-points_x, 
+        Model-space-points_y, 
+        Model-space-points_z)>
+
+<!ELEMENT Model-space-points_scale-factor (%INTEGER;)>
+
+<!ELEMENT Model-space-points_x (Model-space-points_x_E*)>
+
+
+<!ELEMENT Model-space-points_x_E (%INTEGER;)>
+
+<!ELEMENT Model-space-points_y (Model-space-points_y_E*)>
+
+
+<!ELEMENT Model-space-points_y_E (%INTEGER;)>
+
+<!ELEMENT Model-space-points_z (Model-space-points_z_E*)>
+
+
+<!ELEMENT Model-space-points_z_E (%INTEGER;)>
+
+
+<!ELEMENT Atomic-temperature-factors (
+        Atomic-temperature-factors_isotropic | 
+        Atomic-temperature-factors_anisotropic)>
+
+<!ELEMENT Atomic-temperature-factors_isotropic (Isotropic-temperature-factors)>
+
+<!ELEMENT Atomic-temperature-factors_anisotropic (Anisotropic-temperature-factors)>
+
+
+<!ELEMENT Isotropic-temperature-factors (
+        Isotropic-temperature-factors_scale-factor, 
+        Isotropic-temperature-factors_b)>
+
+<!ELEMENT Isotropic-temperature-factors_scale-factor (%INTEGER;)>
+
+<!ELEMENT Isotropic-temperature-factors_b (Isotropic-temperature-factors_b_E*)>
+
+
+<!ELEMENT Isotropic-temperature-factors_b_E (%INTEGER;)>
+
+
+<!ELEMENT Anisotropic-temperature-factors (
+        Anisotropic-temperature-factors_scale-factor, 
+        Anisotropic-temperature-factors_b-11, 
+        Anisotropic-temperature-factors_b-12, 
+        Anisotropic-temperature-factors_b-13, 
+        Anisotropic-temperature-factors_b-22, 
+        Anisotropic-temperature-factors_b-23, 
+        Anisotropic-temperature-factors_b-33)>
+
+<!ELEMENT Anisotropic-temperature-factors_scale-factor (%INTEGER;)>
+
+<!ELEMENT Anisotropic-temperature-factors_b-11 (Anisotropic-temperature-factors_b-11_E*)>
+
+
+<!ELEMENT Anisotropic-temperature-factors_b-11_E (%INTEGER;)>
+
+<!ELEMENT Anisotropic-temperature-factors_b-12 (Anisotropic-temperature-factors_b-12_E*)>
+
+
+<!ELEMENT Anisotropic-temperature-factors_b-12_E (%INTEGER;)>
+
+<!ELEMENT Anisotropic-temperature-factors_b-13 (Anisotropic-temperature-factors_b-13_E*)>
+
+
+<!ELEMENT Anisotropic-temperature-factors_b-13_E (%INTEGER;)>
+
+<!ELEMENT Anisotropic-temperature-factors_b-22 (Anisotropic-temperature-factors_b-22_E*)>
+
+
+<!ELEMENT Anisotropic-temperature-factors_b-22_E (%INTEGER;)>
+
+<!ELEMENT Anisotropic-temperature-factors_b-23 (Anisotropic-temperature-factors_b-23_E*)>
+
+
+<!ELEMENT Anisotropic-temperature-factors_b-23_E (%INTEGER;)>
+
+<!ELEMENT Anisotropic-temperature-factors_b-33 (Anisotropic-temperature-factors_b-33_E*)>
+
+
+<!ELEMENT Anisotropic-temperature-factors_b-33_E (%INTEGER;)>
+
+
+<!ELEMENT Atomic-occupancies (
+        Atomic-occupancies_scale-factor, 
+        Atomic-occupancies_o)>
+
+<!ELEMENT Atomic-occupancies_scale-factor (%INTEGER;)>
+
+<!ELEMENT Atomic-occupancies_o (Atomic-occupancies_o_E*)>
+
+
+<!ELEMENT Atomic-occupancies_o_E (%INTEGER;)>
+
+<!--
+ An alternate conformation id is optionally associated with each coordinate. 
+ Aside from corrections due to the validation checks described above, the 
+ contents of MMDB Alternate-conformation-ids are identical to the PDB 
+ "alternate conformation" field.
+-->
+<!ELEMENT Alternate-conformation-ids (Alternate-conformation-id*)>
+
+
+<!ELEMENT Alternate-conformation-id (#PCDATA)>
+
+<!--
+ Correlated disorder ensemble is defined by a set of alternate conformation 
+ id's which identify coordinates relevant to that ensemble. These are 
+ defined from the validated and corrected contents of the PDB "alternate
+ conformation" field as described above.  A given ensemble, for example, may
+ consist of atom sites flagged by " " and "A" Alternate-conformation-ids. 
+ Names for ensembles are constructed from these flags. This example would be
+ named, in its description, "PDB Ensemble blank plus A".
+ Note that this interpretation is consistent with common PDB usage of the 
+ "alternate conformation" field, but that PDB specifications do not formally
+ distinguish between correlated and uncorrelated disorder in crystallographic
+ models. Ensembles identified in MMDB thus may not correspond to the meaning
+ intended by PDB or the depositor.  No information is lost, however, and
+ if the intended meaning is known alternative ensemble descriptions may be
+ reconstructed directly from the Alternate-conformation-ids.
+ Note that correlated disorder as defined here is allowed within an atomic 
+ coordinate set but not between the multiple sets which may define a model. 
+ Multiple sets within the same model are intended as a means to represent 
+ assemblies modeled from different experimentally determined structures,
+ where correlated disorder between coordinate sets is not relevant.
+-->
+<!ELEMENT Conformation-ensemble (
+        Conformation-ensemble_name, 
+        Conformation-ensemble_alt-conf-ids)>
+
+<!ELEMENT Conformation-ensemble_name (#PCDATA)>
+
+<!ELEMENT Conformation-ensemble_alt-conf-ids (Alternate-conformation-id*)>
+
+<!--
+ Literal surface coordinates define the chemical components whose structure
+ is described by a surface, and the surface itself.  The surface may be
+ either a regular geometric solid or a triangle-mesh of arbitrary shape.
+-->
+<!ELEMENT Surface-coordinates (
+        Surface-coordinates_contents, 
+        Surface-coordinates_surface)>
+
+<!ELEMENT Surface-coordinates_contents (Chem-graph-pntrs)>
+
+<!ELEMENT Surface-coordinates_surface (
+        Surface-coordinates_surface_sphere | 
+        Surface-coordinates_surface_cone | 
+        Surface-coordinates_surface_cylinder | 
+        Surface-coordinates_surface_brick | 
+        Surface-coordinates_surface_tmesh | 
+        Surface-coordinates_surface_triangles)>
+
+<!ELEMENT Surface-coordinates_surface_sphere (Sphere)>
+
+<!ELEMENT Surface-coordinates_surface_cone (Cone)>
+
+<!ELEMENT Surface-coordinates_surface_cylinder (Cylinder)>
+
+<!ELEMENT Surface-coordinates_surface_brick (Brick)>
+
+<!ELEMENT Surface-coordinates_surface_tmesh (T-mesh)>
+
+<!ELEMENT Surface-coordinates_surface_triangles (Triangles)>
+
+
+<!ELEMENT T-mesh (
+        T-mesh_number-of-points, 
+        T-mesh_scale-factor, 
+        T-mesh_swap, 
+        T-mesh_x, 
+        T-mesh_y, 
+        T-mesh_z)>
+
+<!ELEMENT T-mesh_number-of-points (%INTEGER;)>
+
+<!ELEMENT T-mesh_scale-factor (%INTEGER;)>
+
+<!ELEMENT T-mesh_swap (T-mesh_swap_E*)>
+
+
+<!ELEMENT T-mesh_swap_E EMPTY>
+<!ATTLIST T-mesh_swap_E value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT T-mesh_x (T-mesh_x_E*)>
+
+
+<!ELEMENT T-mesh_x_E (%INTEGER;)>
+
+<!ELEMENT T-mesh_y (T-mesh_y_E*)>
+
+
+<!ELEMENT T-mesh_y_E (%INTEGER;)>
+
+<!ELEMENT T-mesh_z (T-mesh_z_E*)>
+
+
+<!ELEMENT T-mesh_z_E (%INTEGER;)>
+
+
+<!ELEMENT Triangles (
+        Triangles_number-of-points, 
+        Triangles_scale-factor, 
+        Triangles_x, 
+        Triangles_y, 
+        Triangles_z, 
+        Triangles_number-of-triangles, 
+        Triangles_v1, 
+        Triangles_v2, 
+        Triangles_v3)>
+
+<!ELEMENT Triangles_number-of-points (%INTEGER;)>
+
+<!ELEMENT Triangles_scale-factor (%INTEGER;)>
+
+<!ELEMENT Triangles_x (Triangles_x_E*)>
+
+
+<!ELEMENT Triangles_x_E (%INTEGER;)>
+
+<!ELEMENT Triangles_y (Triangles_y_E*)>
+
+
+<!ELEMENT Triangles_y_E (%INTEGER;)>
+
+<!ELEMENT Triangles_z (Triangles_z_E*)>
+
+
+<!ELEMENT Triangles_z_E (%INTEGER;)>
+
+<!ELEMENT Triangles_number-of-triangles (%INTEGER;)>
+
+<!ELEMENT Triangles_v1 (Triangles_v1_E*)>
+
+
+<!ELEMENT Triangles_v1_E (%INTEGER;)>
+
+<!ELEMENT Triangles_v2 (Triangles_v2_E*)>
+
+
+<!ELEMENT Triangles_v2_E (%INTEGER;)>
+
+<!ELEMENT Triangles_v3 (Triangles_v3_E*)>
+
+
+<!ELEMENT Triangles_v3_E (%INTEGER;)>
+
+<!--
+ Literal density coordinates define the chemical components whose structure
+ is described by a density grid, parameters of this grid, and density values.
+-->
+<!ELEMENT Density-coordinates (
+        Density-coordinates_contents, 
+        Density-coordinates_grid-corners, 
+        Density-coordinates_grid-steps-x, 
+        Density-coordinates_grid-steps-y, 
+        Density-coordinates_grid-steps-z, 
+        Density-coordinates_fastest-varying, 
+        Density-coordinates_slowest-varying, 
+        Density-coordinates_scale-factor, 
+        Density-coordinates_density)>
+
+<!ELEMENT Density-coordinates_contents (Chem-graph-pntrs)>
+
+<!ELEMENT Density-coordinates_grid-corners (Brick)>
+
+<!ELEMENT Density-coordinates_grid-steps-x (%INTEGER;)>
+
+<!ELEMENT Density-coordinates_grid-steps-y (%INTEGER;)>
+
+<!ELEMENT Density-coordinates_grid-steps-z (%INTEGER;)>
+
+<!ELEMENT Density-coordinates_fastest-varying %ENUM;>
+<!ATTLIST Density-coordinates_fastest-varying value (
+        x |
+        y |
+        z
+        ) #REQUIRED >
+
+
+<!ELEMENT Density-coordinates_slowest-varying %ENUM;>
+<!ATTLIST Density-coordinates_slowest-varying value (
+        x |
+        y |
+        z
+        ) #REQUIRED >
+
+
+<!ELEMENT Density-coordinates_scale-factor (%INTEGER;)>
+
+<!ELEMENT Density-coordinates_density (Density-coordinates_density_E*)>
+
+
+<!ELEMENT Density-coordinates_density_E (%INTEGER;)>
+
diff --git a/dtd/NCBI_Access.dtd b/dtd/NCBI_Access.dtd
new file mode 100644
index 0000000..5dcedf0
--- /dev/null
+++ b/dtd/NCBI_Access.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "access.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Access.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Access_module PUBLIC "-//NCBI//NCBI Access Module//EN" "NCBI_Access.mod.dtd">
+%NCBI_Access_module;
diff --git a/dtd/NCBI_Access.mod.dtd b/dtd/NCBI_Access.mod.dtd
new file mode 100644
index 0000000..e83ad2a
--- /dev/null
+++ b/dtd/NCBI_Access.mod.dtd
@@ -0,0 +1,49 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "access.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Access"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+*********************************************************************
+
+  access.asn
+
+     messages for data access
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Link-set -->
+<!-- ============================================ -->
+
+<!--
+ links between same class = neighbors
+ links between other classes = links
+-->
+<!ELEMENT Link-set (
+        Link-set_num, 
+        Link-set_uids?, 
+        Link-set_weights?)>
+
+<!-- number of links to this doc type -->
+<!ELEMENT Link-set_num (%INTEGER;)>
+
+<!-- the links -->
+<!ELEMENT Link-set_uids (Link-set_uids_E*)>
+
+
+<!ELEMENT Link-set_uids_E (%INTEGER;)>
+
+<!-- the weights -->
+<!ELEMENT Link-set_weights (Link-set_weights_E*)>
+
+
+<!ELEMENT Link-set_weights_E (%INTEGER;)>
+
diff --git a/dtd/NCBI_Biblio.dtd b/dtd/NCBI_Biblio.dtd
new file mode 100644
index 0000000..17edc09
--- /dev/null
+++ b/dtd/NCBI_Biblio.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "biblio.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Biblio.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
diff --git a/dtd/NCBI_Biblio.mod.dtd b/dtd/NCBI_Biblio.mod.dtd
new file mode 100644
index 0000000..e0b7e1d
--- /dev/null
+++ b/dtd/NCBI_Biblio.mod.dtd
@@ -0,0 +1,690 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "biblio.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 12/20/2010 23:04:52
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Biblio"
+================================================= -->
+
+<!--
+$Revision: 217677 $
+****************************************************************
+
+  NCBI Bibliographic data elements
+  by James Ostell, 1990
+
+  Taken from the American National Standard for
+      Bibliographic References
+      ANSI Z39.29-1977
+  Version 3.0 - June 1994
+  PubMedId added in 1996
+  ArticleIds and eprint elements added in 1999
+
+****************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Cit-art,
+          Cit-jour,
+          Cit-book,
+          Cit-pat,
+          Cit-let,
+          Id-pat,
+          Cit-gen,
+          Cit-proc,
+          Cit-sub,
+          Title,
+          Author,
+          PubMedId,
+          DOI -->
+
+<!-- Elements referenced from other modules:
+          Person-id,
+          Date,
+          Dbtag FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+ Article Ids
+ can be many ids for an article
+-->
+<!ELEMENT ArticleId (
+        ArticleId_pubmed | 
+        ArticleId_medline | 
+        ArticleId_doi | 
+        ArticleId_pii | 
+        ArticleId_pmcid | 
+        ArticleId_pmcpid | 
+        ArticleId_pmpid | 
+        ArticleId_other)>
+
+<!-- see types below -->
+<!ELEMENT ArticleId_pubmed (PubMedId)>
+<!-- Id from MEDLINE -->
+<!ELEMENT ArticleId_medline (MedlineUID)>
+<!-- Document Object Identifier -->
+<!ELEMENT ArticleId_doi (DOI)>
+<!-- Controlled Publisher Identifier -->
+<!ELEMENT ArticleId_pii (PII)>
+<!-- PubMed Central Id -->
+<!ELEMENT ArticleId_pmcid (PmcID)>
+<!-- Publisher Id supplied to PubMed Central -->
+<!ELEMENT ArticleId_pmcpid (PmcPid)>
+<!-- Publisher Id supplied to PubMed -->
+<!ELEMENT ArticleId_pmpid (PmPid)>
+
+<!-- generic catch all -->
+<!ELEMENT ArticleId_other (Dbtag)>
+
+<!-- Id from the PubMed database at NCBI -->
+<!ELEMENT PubMedId (%INTEGER;)>
+
+<!-- Id from MEDLINE -->
+<!ELEMENT MedlineUID (%INTEGER;)>
+
+<!-- Document Object Identifier -->
+<!ELEMENT DOI (#PCDATA)>
+
+<!-- Controlled Publisher Identifier -->
+<!ELEMENT PII (#PCDATA)>
+
+<!-- PubMed Central Id -->
+<!ELEMENT PmcID (%INTEGER;)>
+
+<!-- Publisher Id supplied to PubMed Central -->
+<!ELEMENT PmcPid (#PCDATA)>
+
+<!-- Publisher Id supplied to PubMed -->
+<!ELEMENT PmPid (#PCDATA)>
+
+
+<!ELEMENT ArticleIdSet (ArticleId*)>
+
+<!--
+ Status Dates
+ points of publication
+-->
+<!ELEMENT PubStatus (%INTEGER;)>
+
+<!--
+    received	-  date manuscript received for review
+    accepted	-  accepted for publication
+    epublish	-  published electronically by publisher
+    ppublish	-  published in print by publisher
+    revised	-  article revised by publisher/author
+    pmc	-  article first appeared in PubMed Central
+    pmcr	-  article revision in PubMed Central
+    pubmed	-  article citation first appeared in PubMed
+    pubmedr	-  article citation revision in PubMed
+    aheadofprint	-  epublish, but will be followed by print
+    premedline	-  date into PreMedline status
+    medline	-  date made a MEDLINE record
+-->
+<!ATTLIST PubStatus value (
+        received |
+        accepted |
+        epublish |
+        ppublish |
+        revised |
+        pmc |
+        pmcr |
+        pubmed |
+        pubmedr |
+        aheadofprint |
+        premedline |
+        medline |
+        other
+        ) #IMPLIED >
+
+
+<!-- done as a structure so fields can be added -->
+<!ELEMENT PubStatusDate (
+        PubStatusDate_pubstatus, 
+        PubStatusDate_date)>
+<!--
+ Status Dates
+ points of publication
+-->
+<!ELEMENT PubStatusDate_pubstatus (PubStatus)>
+
+<!-- time may be added later -->
+<!ELEMENT PubStatusDate_date (Date)>
+
+
+<!ELEMENT PubStatusDateSet (PubStatusDate*)>
+
+<!--
+ Citation Types
+ article in journal or book
+-->
+<!ELEMENT Cit-art (
+        Cit-art_title?, 
+        Cit-art_authors?, 
+        Cit-art_from, 
+        Cit-art_ids?)>
+
+<!-- title of paper (ANSI requires) -->
+<!ELEMENT Cit-art_title (Title)>
+
+<!-- authors (ANSI requires) -->
+<!ELEMENT Cit-art_authors (Auth-list)>
+<!-- journal or book -->
+<!ELEMENT Cit-art_from (
+        Cit-art_from_journal | 
+        Cit-art_from_book | 
+        Cit-art_from_proc)>
+<!-- Journal citation -->
+<!ELEMENT Cit-art_from_journal (Cit-jour)>
+<!-- Book citation -->
+<!ELEMENT Cit-art_from_book (Cit-book)>
+<!-- Meeting proceedings -->
+<!ELEMENT Cit-art_from_proc (Cit-proc)>
+
+<!-- lots of ids -->
+<!ELEMENT Cit-art_ids (ArticleIdSet)>
+
+<!-- Journal citation -->
+<!ELEMENT Cit-jour (
+        Cit-jour_title, 
+        Cit-jour_imp)>
+
+<!-- title of journal -->
+<!ELEMENT Cit-jour_title (Title)>
+<!-- Imprint group -->
+<!ELEMENT Cit-jour_imp (Imprint)>
+
+<!-- Book citation -->
+<!ELEMENT Cit-book (
+        Cit-book_title, 
+        Cit-book_coll?, 
+        Cit-book_authors, 
+        Cit-book_imp)>
+
+<!-- Title of book -->
+<!ELEMENT Cit-book_title (Title)>
+
+<!-- part of a collection -->
+<!ELEMENT Cit-book_coll (Title)>
+
+<!-- authors -->
+<!ELEMENT Cit-book_authors (Auth-list)>
+<!-- Imprint group -->
+<!ELEMENT Cit-book_imp (Imprint)>
+
+<!-- Meeting proceedings -->
+<!ELEMENT Cit-proc (
+        Cit-proc_book, 
+        Cit-proc_meet)>
+
+<!-- citation to meeting -->
+<!ELEMENT Cit-proc_book (Cit-book)>
+
+<!-- time and location of meeting -->
+<!ELEMENT Cit-proc_meet (Meeting)>
+
+<!--
+ Patent number and date-issue were made optional in 1997 to
+   support patent applications being issued from the USPTO
+   Semantically a Cit-pat must have either a patent number or
+   an application number (or both) to be valid
+ patent citation
+-->
+<!ELEMENT Cit-pat (
+        Cit-pat_title, 
+        Cit-pat_authors, 
+        Cit-pat_country, 
+        Cit-pat_doc-type, 
+        Cit-pat_number?, 
+        Cit-pat_date-issue?, 
+        Cit-pat_class?, 
+        Cit-pat_app-number?, 
+        Cit-pat_app-date?, 
+        Cit-pat_applicants?, 
+        Cit-pat_assignees?, 
+        Cit-pat_priority?, 
+        Cit-pat_abstract?)>
+
+<!ELEMENT Cit-pat_title (#PCDATA)>
+
+<!-- author/inventor -->
+<!ELEMENT Cit-pat_authors (Auth-list)>
+
+<!-- Patent Document Country -->
+<!ELEMENT Cit-pat_country (#PCDATA)>
+
+<!-- Patent Document Type -->
+<!ELEMENT Cit-pat_doc-type (#PCDATA)>
+
+<!-- Patent Document Number -->
+<!ELEMENT Cit-pat_number (#PCDATA)>
+
+<!-- Patent Issue/Pub Date -->
+<!ELEMENT Cit-pat_date-issue (Date)>
+
+<!-- Patent Doc Class Code  -->
+<!ELEMENT Cit-pat_class (Cit-pat_class_E*)>
+
+
+<!ELEMENT Cit-pat_class_E (#PCDATA)>
+
+<!-- Patent Doc Appl Number -->
+<!ELEMENT Cit-pat_app-number (#PCDATA)>
+
+<!-- Patent Appl File Date -->
+<!ELEMENT Cit-pat_app-date (Date)>
+
+<!-- Applicants -->
+<!ELEMENT Cit-pat_applicants (Auth-list)>
+
+<!-- Assignees -->
+<!ELEMENT Cit-pat_assignees (Auth-list)>
+
+<!-- Priorities -->
+<!ELEMENT Cit-pat_priority (Patent-priority*)>
+
+<!-- abstract of patent -->
+<!ELEMENT Cit-pat_abstract (#PCDATA)>
+
+
+<!ELEMENT Patent-priority (
+        Patent-priority_country, 
+        Patent-priority_number, 
+        Patent-priority_date)>
+
+<!-- Patent country code -->
+<!ELEMENT Patent-priority_country (#PCDATA)>
+
+<!-- number assigned in that country -->
+<!ELEMENT Patent-priority_number (#PCDATA)>
+
+<!-- date of application -->
+<!ELEMENT Patent-priority_date (Date)>
+
+<!-- just to identify a patent -->
+<!ELEMENT Id-pat (
+        Id-pat_country, 
+        Id-pat_id, 
+        Id-pat_doc-type?)>
+
+<!-- Patent Document Country -->
+<!ELEMENT Id-pat_country (#PCDATA)>
+
+<!ELEMENT Id-pat_id (
+        Id-pat_id_number | 
+        Id-pat_id_app-number)>
+
+<!-- Patent Document Number -->
+<!ELEMENT Id-pat_id_number (#PCDATA)>
+
+<!-- Patent Doc Appl Number -->
+<!ELEMENT Id-pat_id_app-number (#PCDATA)>
+
+<!-- Patent Doc Type -->
+<!ELEMENT Id-pat_doc-type (#PCDATA)>
+
+<!-- letter, thesis, or manuscript -->
+<!ELEMENT Cit-let (
+        Cit-let_cit, 
+        Cit-let_man-id?, 
+        Cit-let_type?)>
+
+<!-- same fields as a book -->
+<!ELEMENT Cit-let_cit (Cit-book)>
+
+<!-- Manuscript identifier -->
+<!ELEMENT Cit-let_man-id (#PCDATA)>
+
+<!ELEMENT Cit-let_type %ENUM;>
+<!ATTLIST Cit-let_type value (
+        manuscript |
+        letter |
+        thesis
+        ) #REQUIRED >
+
+
+<!--
+ NOTE: this is just to cite a
+ direct data submission, see NCBI-Submit
+ for the form of a sequence submission
+ citation for a direct submission
+-->
+<!ELEMENT Cit-sub (
+        Cit-sub_authors, 
+        Cit-sub_imp?, 
+        Cit-sub_medium?, 
+        Cit-sub_date?, 
+        Cit-sub_descr?)>
+
+<!-- not necessarily authors of the paper -->
+<!ELEMENT Cit-sub_authors (Auth-list)>
+
+<!-- this only used to get date.. will go -->
+<!ELEMENT Cit-sub_imp (Imprint)>
+<!-- medium of submission -->
+<!ELEMENT Cit-sub_medium %ENUM;>
+<!ATTLIST Cit-sub_medium value (
+        paper |
+        tape |
+        floppy |
+        email |
+        other
+        ) #REQUIRED >
+
+
+<!-- replaces imp, will become required -->
+<!ELEMENT Cit-sub_date (Date)>
+
+<!-- description of changes for public view -->
+<!ELEMENT Cit-sub_descr (#PCDATA)>
+
+<!-- NOT from ANSI, this is a catchall -->
+<!ELEMENT Cit-gen (
+        Cit-gen_cit?, 
+        Cit-gen_authors?, 
+        Cit-gen_muid?, 
+        Cit-gen_journal?, 
+        Cit-gen_volume?, 
+        Cit-gen_issue?, 
+        Cit-gen_pages?, 
+        Cit-gen_date?, 
+        Cit-gen_serial-number?, 
+        Cit-gen_title?, 
+        Cit-gen_pmid?)>
+
+<!-- anything, not parsable -->
+<!ELEMENT Cit-gen_cit (#PCDATA)>
+<!-- Authorship Group -->
+<!ELEMENT Cit-gen_authors (Auth-list)>
+
+<!-- medline uid -->
+<!ELEMENT Cit-gen_muid (%INTEGER;)>
+<!--
+ Title Group
+ Valid for = A = Analytic (Cit-art)
+             J = Journals (Cit-jour)
+             B = Book (Cit-book)
+ Valid for:
+-->
+<!ELEMENT Cit-gen_journal (Title)>
+
+<!ELEMENT Cit-gen_volume (#PCDATA)>
+
+<!ELEMENT Cit-gen_issue (#PCDATA)>
+
+<!ELEMENT Cit-gen_pages (#PCDATA)>
+
+<!ELEMENT Cit-gen_date (Date)>
+
+<!-- for GenBank style references -->
+<!ELEMENT Cit-gen_serial-number (%INTEGER;)>
+
+<!-- eg. cit="unpublished",title="title" -->
+<!ELEMENT Cit-gen_title (#PCDATA)>
+
+<!-- PubMed Id -->
+<!ELEMENT Cit-gen_pmid (PubMedId)>
+
+<!-- Authorship Group -->
+<!ELEMENT Auth-list (
+        Auth-list_names, 
+        Auth-list_affil?)>
+
+<!ELEMENT Auth-list_names (
+        Auth-list_names_std | 
+        Auth-list_names_ml | 
+        Auth-list_names_str)>
+
+<!-- full citations -->
+<!ELEMENT Auth-list_names_std (Author*)>
+
+<!-- MEDLINE, semi-structured -->
+<!ELEMENT Auth-list_names_ml (Auth-list_names_ml_E*)>
+
+
+<!ELEMENT Auth-list_names_ml_E (#PCDATA)>
+
+<!-- free for all -->
+<!ELEMENT Auth-list_names_str (Auth-list_names_str_E*)>
+
+
+<!ELEMENT Auth-list_names_str_E (#PCDATA)>
+
+<!-- author affiliation -->
+<!ELEMENT Auth-list_affil (Affil)>
+
+
+<!ELEMENT Author (
+        Author_name, 
+        Author_level?, 
+        Author_role?, 
+        Author_affil?, 
+        Author_is-corr?)>
+
+<!-- Author, Primary or Secondary -->
+<!ELEMENT Author_name (Person-id)>
+
+<!ELEMENT Author_level %ENUM;>
+<!ATTLIST Author_level value (
+        primary |
+        secondary
+        ) #REQUIRED >
+
+<!-- Author Role Indicator -->
+<!ELEMENT Author_role %ENUM;>
+<!ATTLIST Author_role value (
+        compiler |
+        editor |
+        patent-assignee |
+        translator
+        ) #REQUIRED >
+
+
+<!ELEMENT Author_affil (Affil)>
+
+<!-- TRUE if corresponding author -->
+<!ELEMENT Author_is-corr EMPTY>
+<!ATTLIST Author_is-corr value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT Affil (
+        Affil_str | 
+        Affil_std)>
+
+<!-- unparsed string -->
+<!ELEMENT Affil_str (#PCDATA)>
+<!-- std representation -->
+<!ELEMENT Affil_std (
+        Affil_std_affil?, 
+        Affil_std_div?, 
+        Affil_std_city?, 
+        Affil_std_sub?, 
+        Affil_std_country?, 
+        Affil_std_street?, 
+        Affil_std_email?, 
+        Affil_std_fax?, 
+        Affil_std_phone?, 
+        Affil_std_postal-code?)>
+
+<!-- Author Affiliation, Name -->
+<!ELEMENT Affil_std_affil (#PCDATA)>
+
+<!-- Author Affiliation, Division -->
+<!ELEMENT Affil_std_div (#PCDATA)>
+
+<!-- Author Affiliation, City -->
+<!ELEMENT Affil_std_city (#PCDATA)>
+
+<!-- Author Affiliation, County Sub -->
+<!ELEMENT Affil_std_sub (#PCDATA)>
+
+<!-- Author Affiliation, Country -->
+<!ELEMENT Affil_std_country (#PCDATA)>
+
+<!-- street address, not ANSI -->
+<!ELEMENT Affil_std_street (#PCDATA)>
+
+<!ELEMENT Affil_std_email (#PCDATA)>
+
+<!ELEMENT Affil_std_fax (#PCDATA)>
+
+<!ELEMENT Affil_std_phone (#PCDATA)>
+
+<!ELEMENT Affil_std_postal-code (#PCDATA)>
+
+<!--
+ Title Group
+ Valid for = A = Analytic (Cit-art)
+             J = Journals (Cit-jour)
+             B = Book (Cit-book)
+ Valid for:
+-->
+<!ELEMENT Title (Title_E*)>
+
+
+
+<!ELEMENT Title_E (
+        Title_E_name | 
+        Title_E_tsub | 
+        Title_E_trans | 
+        Title_E_jta | 
+        Title_E_iso-jta | 
+        Title_E_ml-jta | 
+        Title_E_coden | 
+        Title_E_issn | 
+        Title_E_abr | 
+        Title_E_isbn)>
+
+<!-- Title, Anal,Coll,Mono    AJB -->
+<!ELEMENT Title_E_name (#PCDATA)>
+
+<!-- Title, Subordinate       A B -->
+<!ELEMENT Title_E_tsub (#PCDATA)>
+
+<!-- Title, Translated        AJB -->
+<!ELEMENT Title_E_trans (#PCDATA)>
+
+<!-- Title, Abbreviated        J -->
+<!ELEMENT Title_E_jta (#PCDATA)>
+
+<!-- specifically ISO jta      J -->
+<!ELEMENT Title_E_iso-jta (#PCDATA)>
+
+<!-- specifically MEDLINE jta  J -->
+<!ELEMENT Title_E_ml-jta (#PCDATA)>
+
+<!-- a coden                   J -->
+<!ELEMENT Title_E_coden (#PCDATA)>
+
+<!-- ISSN                      J -->
+<!ELEMENT Title_E_issn (#PCDATA)>
+
+<!-- Title, Abbreviated         B -->
+<!ELEMENT Title_E_abr (#PCDATA)>
+
+<!-- ISBN                       B -->
+<!ELEMENT Title_E_isbn (#PCDATA)>
+
+<!-- Imprint group -->
+<!ELEMENT Imprint (
+        Imprint_date, 
+        Imprint_volume?, 
+        Imprint_issue?, 
+        Imprint_pages?, 
+        Imprint_section?, 
+        Imprint_pub?, 
+        Imprint_cprt?, 
+        Imprint_part-sup?, 
+        Imprint_language?, 
+        Imprint_prepub?, 
+        Imprint_part-supi?, 
+        Imprint_retract?, 
+        Imprint_pubstatus?, 
+        Imprint_history?)>
+
+<!-- date of publication -->
+<!ELEMENT Imprint_date (Date)>
+
+<!ELEMENT Imprint_volume (#PCDATA)>
+
+<!ELEMENT Imprint_issue (#PCDATA)>
+
+<!ELEMENT Imprint_pages (#PCDATA)>
+
+<!ELEMENT Imprint_section (#PCDATA)>
+
+<!-- publisher, required for book -->
+<!ELEMENT Imprint_pub (Affil)>
+
+<!-- copyright date, "    "   " -->
+<!ELEMENT Imprint_cprt (Date)>
+
+<!-- part/sup of volume -->
+<!ELEMENT Imprint_part-sup (#PCDATA)>
+
+<!-- put here for simplicity -->
+<!ELEMENT Imprint_language (#PCDATA)>
+<!-- for prepublication citations -->
+<!ELEMENT Imprint_prepub %ENUM;>
+
+<!--
+    submitted	-  submitted, not accepted
+    in-press	-  accepted, not published
+-->
+<!ATTLIST Imprint_prepub value (
+        submitted |
+        in-press |
+        other
+        ) #REQUIRED >
+
+
+<!-- part/sup on issue -->
+<!ELEMENT Imprint_part-supi (#PCDATA)>
+
+<!-- retraction info -->
+<!ELEMENT Imprint_retract (CitRetract)>
+
+<!-- current status of this publication -->
+<!ELEMENT Imprint_pubstatus (PubStatus)>
+
+<!-- dates for this record -->
+<!ELEMENT Imprint_history (PubStatusDateSet)>
+
+
+<!ELEMENT CitRetract (
+        CitRetract_type, 
+        CitRetract_exp?)>
+<!-- retraction of an entry -->
+<!ELEMENT CitRetract_type %ENUM;>
+
+<!--
+    retracted	-  this citation retracted
+    notice	-  this citation is a retraction notice
+    in-error	-  an erratum was published about this
+    erratum	-  this is a published erratum
+-->
+<!ATTLIST CitRetract_type value (
+        retracted |
+        notice |
+        in-error |
+        erratum
+        ) #REQUIRED >
+
+
+<!-- citation and/or explanation -->
+<!ELEMENT CitRetract_exp (#PCDATA)>
+
+
+<!ELEMENT Meeting (
+        Meeting_number, 
+        Meeting_date, 
+        Meeting_place?)>
+
+<!ELEMENT Meeting_number (#PCDATA)>
+
+<!ELEMENT Meeting_date (Date)>
+
+<!ELEMENT Meeting_place (Affil)>
+
diff --git a/dtd/NCBI_BioSource.dtd b/dtd/NCBI_BioSource.dtd
new file mode 100644
index 0000000..2bfea5c
--- /dev/null
+++ b/dtd/NCBI_BioSource.dtd
@@ -0,0 +1,23 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_BioSource.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
diff --git a/dtd/NCBI_BioSource.mod.dtd b/dtd/NCBI_BioSource.mod.dtd
new file mode 100644
index 0000000..6b5c5da
--- /dev/null
+++ b/dtd/NCBI_BioSource.mod.dtd
@@ -0,0 +1,200 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 09/28/2012 23:04:43
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-BioSource"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  NCBI BioSource
+  by James Ostell, 1994
+  version 3.0
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          BioSource,
+          SubSource -->
+
+<!-- Elements referenced from other modules:
+          Org-ref FROM NCBI-Organism -->
+<!-- ============================================ -->
+
+<!--
+********************************************************************
+
+ BioSource gives the source of the biological material
+   for sequences
+
+********************************************************************
+-->
+<!ELEMENT BioSource (
+        BioSource_genome?, 
+        BioSource_origin?, 
+        BioSource_org, 
+        BioSource_subtype?, 
+        BioSource_is-focus?, 
+        BioSource_pcr-primers?)>
+<!-- biological context -->
+<!ELEMENT BioSource_genome (%INTEGER;)>
+<!ATTLIST BioSource_genome value (
+        unknown |
+        genomic |
+        chloroplast |
+        chromoplast |
+        kinetoplast |
+        mitochondrion |
+        plastid |
+        macronuclear |
+        extrachrom |
+        plasmid |
+        transposon |
+        insertion-seq |
+        cyanelle |
+        proviral |
+        virion |
+        nucleomorph |
+        apicoplast |
+        leucoplast |
+        proplastid |
+        endogenous-virus |
+        hydrogenosome |
+        chromosome |
+        chromatophore
+        ) #IMPLIED >
+
+
+<!ELEMENT BioSource_origin (%INTEGER;)>
+
+<!--
+    natural	-  normal biological entity
+    natmut	-  naturally occurring mutant
+    mut	-  artificially mutagenized
+    artificial	-  artificially engineered
+    synthetic	-  purely synthetic
+-->
+<!ATTLIST BioSource_origin value (
+        unknown |
+        natural |
+        natmut |
+        mut |
+        artificial |
+        synthetic |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT BioSource_org (Org-ref)>
+
+<!ELEMENT BioSource_subtype (SubSource*)>
+
+<!-- to distinguish biological focus -->
+<!ELEMENT BioSource_is-focus EMPTY>
+
+<!ELEMENT BioSource_pcr-primers (PCRReactionSet)>
+
+
+<!ELEMENT PCRReactionSet (PCRReaction*)>
+
+
+<!ELEMENT PCRReaction (
+        PCRReaction_forward?, 
+        PCRReaction_reverse?)>
+
+<!ELEMENT PCRReaction_forward (PCRPrimerSet)>
+
+<!ELEMENT PCRReaction_reverse (PCRPrimerSet)>
+
+
+<!ELEMENT PCRPrimerSet (PCRPrimer*)>
+
+
+<!ELEMENT PCRPrimer (
+        PCRPrimer_seq?, 
+        PCRPrimer_name?)>
+
+<!ELEMENT PCRPrimer_seq (PCRPrimerSeq)>
+
+<!ELEMENT PCRPrimer_name (PCRPrimerName)>
+
+
+<!ELEMENT PCRPrimerSeq (#PCDATA)>
+
+
+<!ELEMENT PCRPrimerName (#PCDATA)>
+
+
+<!ELEMENT SubSource (
+        SubSource_subtype, 
+        SubSource_name, 
+        SubSource_attrib?)>
+
+<!ELEMENT SubSource_subtype (%INTEGER;)>
+
+<!--
+    lat-lon	-  +/- decimal degrees
+    collection-date	-  DD-MMM-YYYY format
+    collected-by	-  name of person who collected the sample
+    identified-by	-  name of person who identified the sample
+    fwd-primer-seq	-  sequence (possibly more than one; semicolon-separated)
+    rev-primer-seq	-  sequence (possibly more than one; semicolon-separated)
+-->
+<!ATTLIST SubSource_subtype value (
+        chromosome |
+        map |
+        clone |
+        subclone |
+        haplotype |
+        genotype |
+        sex |
+        cell-line |
+        cell-type |
+        tissue-type |
+        clone-lib |
+        dev-stage |
+        frequency |
+        germline |
+        rearranged |
+        lab-host |
+        pop-variant |
+        tissue-lib |
+        plasmid-name |
+        transposon-name |
+        insertion-seq-name |
+        plastid-name |
+        country |
+        segment |
+        endogenous-virus-name |
+        transgenic |
+        environmental-sample |
+        isolation-source |
+        lat-lon |
+        collection-date |
+        collected-by |
+        identified-by |
+        fwd-primer-seq |
+        rev-primer-seq |
+        fwd-primer-name |
+        rev-primer-name |
+        metagenomic |
+        mating-type |
+        linkage-group |
+        haplogroup |
+        whole-replicon |
+        phenotype |
+        altitude |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT SubSource_name (#PCDATA)>
+
+<!-- attribution/source of this name -->
+<!ELEMENT SubSource_attrib (#PCDATA)>
+
diff --git a/dtd/NCBI_BioTree.dtd b/dtd/NCBI_BioTree.dtd
new file mode 100644
index 0000000..26ba5d9
--- /dev/null
+++ b/dtd/NCBI_BioTree.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "biotree.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_BioTree.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_BioTree_module PUBLIC "-//NCBI//NCBI BioTree Module//EN" "NCBI_BioTree.mod.dtd">
+%NCBI_BioTree_module;
diff --git a/dtd/NCBI_BioTree.mod.dtd b/dtd/NCBI_BioTree.mod.dtd
new file mode 100644
index 0000000..7a2ad1a
--- /dev/null
+++ b/dtd/NCBI_BioTree.mod.dtd
@@ -0,0 +1,109 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "biotree.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-BioTree"
+================================================= -->
+
+<!--
+$Revision: 184613 $
+*********************************************************************
+
+  biotree.asn
+
+     BioTree ASN
+     Anatoliy Kuznetsov
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          BioTreeContainer,
+          DistanceMatrix -->
+<!-- ============================================ -->
+
+
+<!ELEMENT BioTreeContainer (
+        BioTreeContainer_treetype?, 
+        BioTreeContainer_fdict, 
+        BioTreeContainer_nodes, 
+        BioTreeContainer_label?)>
+
+<!-- hint on what kind of tree is that -->
+<!ELEMENT BioTreeContainer_treetype (#PCDATA)>
+
+<!-- features dictionary  -->
+<!ELEMENT BioTreeContainer_fdict (FeatureDictSet)>
+
+<!-- set of nodes with encoded topology -->
+<!ELEMENT BioTreeContainer_nodes (NodeSet)>
+
+<!-- bio-tree label (short name) -->
+<!ELEMENT BioTreeContainer_label (#PCDATA)>
+
+
+<!ELEMENT NodeSet (Node*)>
+
+
+<!ELEMENT Node (
+        Node_id, 
+        Node_parent?, 
+        Node_features?)>
+
+<!-- node uid -->
+<!ELEMENT Node_id (%INTEGER;)>
+
+<!-- parent node id -->
+<!ELEMENT Node_parent (%INTEGER;)>
+
+<!ELEMENT Node_features (NodeFeatureSet)>
+
+
+<!ELEMENT NodeFeatureSet (NodeFeature*)>
+
+
+<!ELEMENT NodeFeature (
+        NodeFeature_featureid, 
+        NodeFeature_value)>
+
+<!ELEMENT NodeFeature_featureid (%INTEGER;)>
+
+<!ELEMENT NodeFeature_value (#PCDATA)>
+
+
+<!ELEMENT FeatureDictSet (FeatureDescr*)>
+
+
+<!ELEMENT FeatureDescr (
+        FeatureDescr_id, 
+        FeatureDescr_name)>
+
+<!-- feature id -->
+<!ELEMENT FeatureDescr_id (%INTEGER;)>
+
+<!-- feature name -->
+<!ELEMENT FeatureDescr_name (#PCDATA)>
+
+
+<!ELEMENT DistanceMatrix (
+        DistanceMatrix_labels, 
+        DistanceMatrix_distances)>
+
+<!-- n labels -->
+<!ELEMENT DistanceMatrix_labels (DistanceMatrix_labels_E*)>
+
+
+<!ELEMENT DistanceMatrix_labels_E (#PCDATA)>
+
+<!--
+ n(n-1)/2 pairwise distances
+ (0, 1)...(0, n), (1, 2)...(1, n)...
+-->
+<!ELEMENT DistanceMatrix_distances (DistanceMatrix_distances_E*)>
+
+
+<!ELEMENT DistanceMatrix_distances_E (%REAL;)>
+
diff --git a/dtd/NCBI_Blast4.dtd b/dtd/NCBI_Blast4.dtd
new file mode 100644
index 0000000..24437c5
--- /dev/null
+++ b/dtd/NCBI_Blast4.dtd
@@ -0,0 +1,95 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "blast.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Blast4.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Blast4_module PUBLIC "-//NCBI//NCBI Blast4 Module//EN" "NCBI_Blast4.mod.dtd">
+%NCBI_Blast4_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_ScoreMat_module PUBLIC "-//NCBI//NCBI ScoreMat Module//EN" "NCBI_ScoreMat.mod.dtd">
+%NCBI_ScoreMat_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Blast4.mod.dtd b/dtd/NCBI_Blast4.mod.dtd
new file mode 100644
index 0000000..f001a47
--- /dev/null
+++ b/dtd/NCBI_Blast4.mod.dtd
@@ -0,0 +1,1498 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "blast.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 04/01/2011 23:04:41
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Blast4"
+================================================= -->
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+                            PUBLIC DOMAIN NOTICE
+                National Center for Biotechnology Information
+
+  This software/database is a "United States Government Work" under the terms
+  of the United States Copyright Act.  It was written as part of the author's
+  official duties as a United States Government employee and thus cannot be
+  copyrighted.  This software/database is freely available to the public for
+  use.  The National Library of Medicine and the U.S. Government have not
+  placed any restriction on its use or reproduction.
+
+  Although all reasonable efforts have been taken to ensure the accuracy and
+  reliability of the software and data, the NLM and the U.S. Government do not
+  and cannot warrant the performance or results that may be obtained by using
+  this software or data.  The NLM and the U.S. Government disclaim all
+  warranties, express or implied, including warranties of performance,
+  merchantability or fitness for any particular purpose.
+
+  Please cite the authors in any work or product based on this material.
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Authors: Tom Madden, Tim Boemker
+
+  ASN.1 interface to BLAST.
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+
+<!-- Elements used by other modules:
+          Blast4-ka-block,
+          Blast4-value,
+          Blast4-parameter,
+          Blast4-parameters -->
+
+<!-- Elements referenced from other modules:
+          Bioseq FROM NCBI-Sequence,
+          Seq-data FROM NCBI-Sequence,
+          Bioseq-set FROM NCBI-Seqset,
+          PssmWithParameters FROM NCBI-ScoreMat,
+          Seq-id,
+          Seq-interval,
+          Seq-loc FROM NCBI-Seqloc,
+          Seq-align,
+          Seq-align-set FROM NCBI-Seqalign -->
+<!-- ============================================ -->
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Requests
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-request (
+        Blast4-request_ident?, 
+        Blast4-request_body)>
+
+<!--
+ Client identifier (email address, organization name, program/script
+ name, or any other form of contacting the owner of this request)
+-->
+<!ELEMENT Blast4-request_ident (#PCDATA)>
+
+<!-- Payload of the request -->
+<!ELEMENT Blast4-request_body (Blast4-request-body)>
+
+<!--
+ An archive format for results.  the results can be reformatted from
+ this format also.
+-->
+<!ELEMENT Blast4-archive (
+        Blast4-archive_request, 
+        Blast4-archive_results)>
+
+<!-- Query and options -->
+<!ELEMENT Blast4-archive_request (Blast4-request)>
+
+<!-- Results of search -->
+<!ELEMENT Blast4-archive_results (Blast4-get-search-results-reply)>
+
+
+<!ELEMENT Blast4-request-body (
+        Blast4-request-body_finish-params | 
+        Blast4-request-body_get-databases | 
+        Blast4-request-body_get-matrices | 
+        Blast4-request-body_get-parameters | 
+        Blast4-request-body_get-paramsets | 
+        Blast4-request-body_get-programs | 
+        Blast4-request-body_get-search-results | 
+        Blast4-request-body_get-sequences | 
+        Blast4-request-body_queue-search | 
+        Blast4-request-body_get-request-info | 
+        Blast4-request-body_get-sequence-parts | 
+        Blast4-request-body_get-windowmasked-taxids)>
+
+<!ELEMENT Blast4-request-body_finish-params (Blast4-finish-params-request)>
+
+<!-- Get all available BLAST databases -->
+<!ELEMENT Blast4-request-body_get-databases EMPTY>
+
+<!-- Get supported scoring matrices -->
+<!ELEMENT Blast4-request-body_get-matrices EMPTY>
+
+<!ELEMENT Blast4-request-body_get-parameters EMPTY>
+
+<!ELEMENT Blast4-request-body_get-paramsets EMPTY>
+
+<!ELEMENT Blast4-request-body_get-programs EMPTY>
+
+<!ELEMENT Blast4-request-body_get-search-results (Blast4-get-search-results-request)>
+<!-- Fetch sequence data from a BLAST database -->
+<!ELEMENT Blast4-request-body_get-sequences (Blast4-get-sequences-request)>
+<!--
+ Options have been broken down into three groups as part of the BLAST
+ API work.  The algorithm options essentially correspond to those
+ options available via the CBlastOptions class.
+ For definitions of the names used in the Blast4-parameter structures, see
+ c++/{include,src}/objects/blast/names.[hc]pp in the NCBI C++ toolkit.
+   algorithm-options: Options for BLAST (ie. seq comparison) algorithm.
+   program-options:   Options for controlling program execution and/or 
+                      database filtering
+   format-options:    Options for formatting BLAST results, clients should
+                      use this only if applicable, otherwise they should be
+                      ignored
+-->
+<!ELEMENT Blast4-request-body_queue-search (Blast4-queue-search-request)>
+<!-- Fetch information about the search request. -->
+<!ELEMENT Blast4-request-body_get-request-info (Blast4-get-request-info-request)>
+<!-- Fetch parts of sequences from a BLAST database -->
+<!ELEMENT Blast4-request-body_get-sequence-parts (Blast4-get-seq-parts-request)>
+
+<!ELEMENT Blast4-request-body_get-windowmasked-taxids EMPTY>
+
+
+<!ELEMENT Blast4-finish-params-request (
+        Blast4-finish-params-request_program, 
+        Blast4-finish-params-request_service, 
+        Blast4-finish-params-request_paramset?, 
+        Blast4-finish-params-request_params?)>
+
+<!ELEMENT Blast4-finish-params-request_program (#PCDATA)>
+
+<!ELEMENT Blast4-finish-params-request_service (#PCDATA)>
+
+<!ELEMENT Blast4-finish-params-request_paramset (#PCDATA)>
+
+<!ELEMENT Blast4-finish-params-request_params (Blast4-parameters)>
+
+<!-- This type allows the specification of what result types are desired -->
+<!ELEMENT Blast4-result-types %ENUM;>
+
+<!--
+    default	-  Default retrieves the following result types (if available): alignments,
+         phi-alignments masks, ka-blocks, search-stats and pssm
+-->
+<!ATTLIST Blast4-result-types value (
+        default |
+        alignments |
+        phi-alignments |
+        masks |
+        ka-blocks |
+        search-stats |
+        pssm |
+        simple-results
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Blast4-get-search-results-request (
+        Blast4-get-search-results-request_request-id, 
+        Blast4-get-search-results-request_result-types?)>
+
+<!-- The request ID of the BLAST search -->
+<!ELEMENT Blast4-get-search-results-request_request-id (#PCDATA)>
+
+<!-- Logical OR of Blast4-result-types, assumes default if absent -->
+<!ELEMENT Blast4-get-search-results-request_result-types (%INTEGER;)>
+
+<!--
+ If a PSSM is used (ie. for PSI-Blast), it must contain a "query"
+ for formatting purposes.  Bioseq-set may contain any number of
+ queries, specified as data.  Seq-loc-list may contain only the
+ "whole" or "interval" types.  In the case of "whole", any number of
+ queries may be used; in the case of "interval", there should be
+ exactly one query.  (This is limited by the BlastObject.)
+-->
+<!ELEMENT Blast4-queries (
+        Blast4-queries_pssm | 
+        Blast4-queries_seq-loc-list | 
+        Blast4-queries_bioseq-set)>
+
+<!ELEMENT Blast4-queries_pssm (PssmWithParameters)>
+
+<!ELEMENT Blast4-queries_seq-loc-list (Seq-loc*)>
+
+<!ELEMENT Blast4-queries_bioseq-set (Bioseq-set)>
+
+<!--
+ Options have been broken down into three groups as part of the BLAST
+ API work.  The algorithm options essentially correspond to those
+ options available via the CBlastOptions class.
+ For definitions of the names used in the Blast4-parameter structures, see
+ c++/{include,src}/objects/blast/names.[hc]pp in the NCBI C++ toolkit.
+   algorithm-options: Options for BLAST (ie. seq comparison) algorithm.
+   program-options:   Options for controlling program execution and/or 
+                      database filtering
+   format-options:    Options for formatting BLAST results, clients should
+                      use this only if applicable, otherwise they should be
+                      ignored
+-->
+<!ELEMENT Blast4-queue-search-request (
+        Blast4-queue-search-request_program, 
+        Blast4-queue-search-request_service, 
+        Blast4-queue-search-request_queries, 
+        Blast4-queue-search-request_subject, 
+        Blast4-queue-search-request_paramset?, 
+        Blast4-queue-search-request_algorithm-options?, 
+        Blast4-queue-search-request_program-options?, 
+        Blast4-queue-search-request_format-options?)>
+
+<!ELEMENT Blast4-queue-search-request_program (#PCDATA)>
+
+<!ELEMENT Blast4-queue-search-request_service (#PCDATA)>
+<!--
+ If a PSSM is used (ie. for PSI-Blast), it must contain a "query"
+ for formatting purposes.  Bioseq-set may contain any number of
+ queries, specified as data.  Seq-loc-list may contain only the
+ "whole" or "interval" types.  In the case of "whole", any number of
+ queries may be used; in the case of "interval", there should be
+ exactly one query.  (This is limited by the BlastObject.)
+-->
+<!ELEMENT Blast4-queue-search-request_queries (Blast4-queries)>
+
+<!ELEMENT Blast4-queue-search-request_subject (Blast4-subject)>
+
+<!-- This field contains a task description -->
+<!ELEMENT Blast4-queue-search-request_paramset (#PCDATA)>
+
+<!ELEMENT Blast4-queue-search-request_algorithm-options (Blast4-parameters)>
+
+<!ELEMENT Blast4-queue-search-request_program-options (Blast4-parameters)>
+
+<!ELEMENT Blast4-queue-search-request_format-options (Blast4-parameters)>
+
+<!-- Simplified search submission structure -->
+<!ELEMENT Blast4-queue-search-request-lite (
+        Blast4-queue-search-request-lite_query, 
+        Blast4-queue-search-request-lite_database-name, 
+        Blast4-queue-search-request-lite_options)>
+
+<!-- query sequence: provide a FASTA sequence, a gi number, or an accession -->
+<!ELEMENT Blast4-queue-search-request-lite_query (#PCDATA)>
+
+<!-- Name of BLAST database to search -->
+<!ELEMENT Blast4-queue-search-request-lite_database-name (#PCDATA)>
+
+<!-- BLAST options -->
+<!ELEMENT Blast4-queue-search-request-lite_options (Blast4-options-lite)>
+
+<!-- Request to retrieve the status of a given search -->
+<!ELEMENT Blast4-get-search-status-request (
+        Blast4-get-search-status-request_request-id)>
+
+<!ELEMENT Blast4-get-search-status-request_request-id (#PCDATA)>
+
+<!-- Reply to retrieve the status of a given search -->
+<!ELEMENT Blast4-get-search-status-reply (
+        Blast4-get-search-status-reply_status)>
+
+<!ELEMENT Blast4-get-search-status-reply_status (#PCDATA)>
+
+<!-- Fetch information about the search request. -->
+<!ELEMENT Blast4-get-request-info-request (
+        Blast4-get-request-info-request_request-id)>
+
+<!ELEMENT Blast4-get-request-info-request_request-id (#PCDATA)>
+
+
+<!ELEMENT Blast4-get-request-info-reply (
+        Blast4-get-request-info-reply_database, 
+        Blast4-get-request-info-reply_program, 
+        Blast4-get-request-info-reply_service, 
+        Blast4-get-request-info-reply_created-by, 
+        Blast4-get-request-info-reply_queries, 
+        Blast4-get-request-info-reply_algorithm-options, 
+        Blast4-get-request-info-reply_program-options, 
+        Blast4-get-request-info-reply_format-options?, 
+        Blast4-get-request-info-reply_subjects?)>
+
+<!ELEMENT Blast4-get-request-info-reply_database (Blast4-database)>
+
+<!ELEMENT Blast4-get-request-info-reply_program (#PCDATA)>
+
+<!ELEMENT Blast4-get-request-info-reply_service (#PCDATA)>
+
+<!ELEMENT Blast4-get-request-info-reply_created-by (#PCDATA)>
+<!--
+ If a PSSM is used (ie. for PSI-Blast), it must contain a "query"
+ for formatting purposes.  Bioseq-set may contain any number of
+ queries, specified as data.  Seq-loc-list may contain only the
+ "whole" or "interval" types.  In the case of "whole", any number of
+ queries may be used; in the case of "interval", there should be
+ exactly one query.  (This is limited by the BlastObject.)
+-->
+<!ELEMENT Blast4-get-request-info-reply_queries (Blast4-queries)>
+
+<!ELEMENT Blast4-get-request-info-reply_algorithm-options (Blast4-parameters)>
+
+<!ELEMENT Blast4-get-request-info-reply_program-options (Blast4-parameters)>
+
+<!ELEMENT Blast4-get-request-info-reply_format-options (Blast4-parameters)>
+
+<!ELEMENT Blast4-get-request-info-reply_subjects (Blast4-subject)>
+
+<!-- Fetch the search strategy (i.e.: object used to submit the search) -->
+<!ELEMENT Blast4-get-search-strategy-request (
+        Blast4-get-search-strategy-request_request-id)>
+
+<!ELEMENT Blast4-get-search-strategy-request_request-id (#PCDATA)>
+
+<!--
+ Return the search strategy (i.e.: Blast4-request containing a
+ Blast4-queue-search-request, an object used to submit the search)
+-->
+<!ELEMENT Blast4-get-search-strategy-reply (Blast4-request)>
+
+<!-- Fetch sequence data from a BLAST database -->
+<!ELEMENT Blast4-get-sequences-request (
+        Blast4-get-sequences-request_database, 
+        Blast4-get-sequences-request_seq-ids, 
+        Blast4-get-sequences-request_skip-seq-data?, 
+        Blast4-get-sequences-request_target-only?)>
+
+<!-- Name of the BLAST database from which to retrieve the sequence data -->
+<!ELEMENT Blast4-get-sequences-request_database (Blast4-database)>
+
+<!-- Sequence identifiers for the sequence to get -->
+<!ELEMENT Blast4-get-sequences-request_seq-ids (Seq-id*)>
+
+<!--
+ Determines whether the returned Bioseqs should contain the sequence data
+ or not
+-->
+<!ELEMENT Blast4-get-sequences-request_skip-seq-data EMPTY>
+<!ATTLIST Blast4-get-sequences-request_skip-seq-data value ( true | false ) "false" >
+
+
+<!--
+ Determines whether or not the defline of the returned Bioseqs should 
+ contain only the requested seq id.  This optional field only applies
+ to non-redundant BLAST database
+-->
+<!ELEMENT Blast4-get-sequences-request_target-only EMPTY>
+<!ATTLIST Blast4-get-sequences-request_target-only value ( true | false ) #REQUIRED >
+
+
+<!-- Fetch parts of sequences from a BLAST database -->
+<!ELEMENT Blast4-get-seq-parts-request (
+        Blast4-get-seq-parts-request_database, 
+        Blast4-get-seq-parts-request_seq-locations)>
+
+<!-- Name of the BLAST database from which to retrieve the sequence data -->
+<!ELEMENT Blast4-get-seq-parts-request_database (Blast4-database)>
+
+<!--
+ Allows the specification of ranges of sequence data needed.
+ If the sequence(s) interval's end is 0, no data will be fetched. 
+ If end is past the length of the sequence, it will be adjusted to the
+ end of the sequence (this allows fetching of the first chunk in
+ cases where the length is not yet known).
+-->
+<!ELEMENT Blast4-get-seq-parts-request_seq-locations (Seq-interval*)>
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Replies
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-reply (
+        Blast4-reply_errors?, 
+        Blast4-reply_body)>
+
+<!ELEMENT Blast4-reply_errors (Blast4-error*)>
+
+<!ELEMENT Blast4-reply_body (Blast4-reply-body)>
+
+
+<!ELEMENT Blast4-reply-body (
+        Blast4-reply-body_finish-params | 
+        Blast4-reply-body_get-databases | 
+        Blast4-reply-body_get-matrices | 
+        Blast4-reply-body_get-parameters | 
+        Blast4-reply-body_get-paramsets | 
+        Blast4-reply-body_get-programs | 
+        Blast4-reply-body_get-search-results | 
+        Blast4-reply-body_get-sequences | 
+        Blast4-reply-body_queue-search | 
+        Blast4-reply-body_get-queries | 
+        Blast4-reply-body_get-request-info | 
+        Blast4-reply-body_get-sequence-parts | 
+        Blast4-reply-body_get-windowmasked-taxids)>
+
+<!ELEMENT Blast4-reply-body_finish-params (Blast4-finish-params-reply)>
+
+<!ELEMENT Blast4-reply-body_get-databases (Blast4-get-databases-reply)>
+
+<!ELEMENT Blast4-reply-body_get-matrices (Blast4-get-matrices-reply)>
+
+<!ELEMENT Blast4-reply-body_get-parameters (Blast4-get-parameters-reply)>
+<!--
+ Note: Paramsets and tasks represent the same concept: a human readable
+ description that represents a set of parameters with specific values 
+ to accomplish a given task
+-->
+<!ELEMENT Blast4-reply-body_get-paramsets (Blast4-get-paramsets-reply)>
+
+<!ELEMENT Blast4-reply-body_get-programs (Blast4-get-programs-reply)>
+
+<!ELEMENT Blast4-reply-body_get-search-results (Blast4-get-search-results-reply)>
+
+<!ELEMENT Blast4-reply-body_get-sequences (Blast4-get-sequences-reply)>
+
+<!ELEMENT Blast4-reply-body_queue-search (Blast4-queue-search-reply)>
+
+<!ELEMENT Blast4-reply-body_get-queries (Blast4-get-queries-reply)>
+
+<!ELEMENT Blast4-reply-body_get-request-info (Blast4-get-request-info-reply)>
+
+<!ELEMENT Blast4-reply-body_get-sequence-parts (Blast4-get-seq-parts-reply)>
+
+<!ELEMENT Blast4-reply-body_get-windowmasked-taxids (Blast4-get-windowmasked-taxids-reply)>
+
+
+<!ELEMENT Blast4-finish-params-reply (Blast4-parameters)>
+
+
+<!ELEMENT Blast4-get-windowmasked-taxids-reply (Blast4-get-windowmasked-taxids-reply_E*)>
+
+
+
+<!ELEMENT Blast4-get-windowmasked-taxids-reply_E (%INTEGER;)>
+
+
+<!ELEMENT Blast4-get-databases-reply (Blast4-database-info*)>
+
+
+<!ELEMENT Blast4-get-matrices-reply (Blast4-matrix-id*)>
+
+
+<!ELEMENT Blast4-get-parameters-reply (Blast4-parameter-info*)>
+
+<!--
+ Note: Paramsets and tasks represent the same concept: a human readable
+ description that represents a set of parameters with specific values 
+ to accomplish a given task
+-->
+<!ELEMENT Blast4-get-paramsets-reply (Blast4-task-info*)>
+
+
+<!ELEMENT Blast4-get-programs-reply (Blast4-program-info*)>
+
+
+<!ELEMENT Blast4-get-search-results-reply (
+        Blast4-get-search-results-reply_alignments?, 
+        Blast4-get-search-results-reply_phi-alignments?, 
+        Blast4-get-search-results-reply_masks?, 
+        Blast4-get-search-results-reply_ka-blocks?, 
+        Blast4-get-search-results-reply_search-stats?, 
+        Blast4-get-search-results-reply_pssm?, 
+        Blast4-get-search-results-reply_simple-results?)>
+
+<!ELEMENT Blast4-get-search-results-reply_alignments (Seq-align-set)>
+
+<!ELEMENT Blast4-get-search-results-reply_phi-alignments (Blast4-phi-alignments)>
+
+<!--
+ Masking locations for the query sequence(s). Each element of this set
+ corresponds to a single query's translation frame as appropriate.
+-->
+<!ELEMENT Blast4-get-search-results-reply_masks (Blast4-mask*)>
+
+<!ELEMENT Blast4-get-search-results-reply_ka-blocks (Blast4-ka-block*)>
+
+<!ELEMENT Blast4-get-search-results-reply_search-stats (Blast4-get-search-results-reply_search-stats_E*)>
+
+
+<!ELEMENT Blast4-get-search-results-reply_search-stats_E (#PCDATA)>
+
+<!ELEMENT Blast4-get-search-results-reply_pssm (PssmWithParameters)>
+<!-- Complete set of simple Blast results -->
+<!ELEMENT Blast4-get-search-results-reply_simple-results (Blast4-simple-results)>
+
+
+<!ELEMENT Blast4-get-sequences-reply (Bioseq*)>
+
+<!--
+ Bundles Seq-ids and sequence data to fulfill requests of type
+ Blast4-get-seq-parts-request
+-->
+<!ELEMENT Blast4-seq-part-data (
+        Blast4-seq-part-data_id, 
+        Blast4-seq-part-data_data)>
+
+<!-- Sequence identifier -->
+<!ELEMENT Blast4-seq-part-data_id (Seq-id)>
+
+<!-- Its sequence data (may be partial) -->
+<!ELEMENT Blast4-seq-part-data_data (Seq-data)>
+
+
+<!ELEMENT Blast4-get-seq-parts-reply (Blast4-seq-part-data*)>
+
+
+<!ELEMENT Blast4-queue-search-reply (
+        Blast4-queue-search-reply_request-id?)>
+
+<!ELEMENT Blast4-queue-search-reply_request-id (#PCDATA)>
+
+
+<!ELEMENT Blast4-get-queries-reply (
+        Blast4-get-queries-reply_queries)>
+<!--
+ If a PSSM is used (ie. for PSI-Blast), it must contain a "query"
+ for formatting purposes.  Bioseq-set may contain any number of
+ queries, specified as data.  Seq-loc-list may contain only the
+ "whole" or "interval" types.  In the case of "whole", any number of
+ queries may be used; in the case of "interval", there should be
+ exactly one query.  (This is limited by the BlastObject.)
+-->
+<!ELEMENT Blast4-get-queries-reply_queries (Blast4-queries)>
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Errors
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-error (
+        Blast4-error_code, 
+        Blast4-error_message?)>
+
+<!--
+ This is an integer to allow for flexibility, but the values assigned
+ should be of type Blast4-error-code
+-->
+<!ELEMENT Blast4-error_code (%INTEGER;)>
+
+<!ELEMENT Blast4-error_message (#PCDATA)>
+
+<!--
+ This enumeration defines values that are intended to be used with the
+ Blast4-error::code in a logical AND operation to easily determine whether a
+ given Blast4-error object contains either a warning or an error
+-->
+<!ELEMENT Blast4-error-flags %ENUM;>
+<!ATTLIST Blast4-error-flags value (
+        warning |
+        error
+        ) #REQUIRED >
+
+
+<!--
+ Defines values for use in Blast4-error::code.
+ Note: warnings should have values greater than 1024 and less than 2048,
+ errors should have values greater than 2048.
+-->
+<!ELEMENT Blast4-error-code (%INTEGER;)>
+
+<!--
+    conversion-warning	-  A conversion issue was found when converting to/from blast3 from/to 
+         blast4 protocol in the blast4 server
+    internal-error	-  Indicates internal errors in the blast4 server
+    not-implemented	-  Request type is not implemented in the blast4 server
+    not-allowed	-  Request type is not allowed in the blast4 server
+    bad-request	-  Malformed/invalid requests (e.g.: parsing errors or invalid data in request)
+    bad-request-id	-  The RID requested is unknown or it has expired
+    search-pending	-  The search is pending
+-->
+<!ATTLIST Blast4-error-code value (
+        conversion-warning |
+        internal-error |
+        not-implemented |
+        not-allowed |
+        bad-request |
+        bad-request-id |
+        search-pending
+        ) #IMPLIED >
+
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Data types to be used in BLAST4 "Lite"
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-common-options-db-restriction-by-organism (
+        Blast4-common-options-db-restriction-by-organism_organism-restriction | 
+        Blast4-common-options-db-restriction-by-organism_taxid-restriction)>
+
+<!-- additional restriction on the database to search -->
+<!ELEMENT Blast4-common-options-db-restriction-by-organism_organism-restriction (#PCDATA)>
+
+<!-- same as above, specified with a taxid -->
+<!ELEMENT Blast4-common-options-db-restriction-by-organism_taxid-restriction (%INTEGER;)>
+
+
+<!ELEMENT Blast4-common-options-db-restriction (
+        Blast4-common-options-db-restriction_entrez-query?, 
+        Blast4-common-options-db-restriction_organism?)>
+
+<!-- entrez query restriction on the database to search -->
+<!ELEMENT Blast4-common-options-db-restriction_entrez-query (#PCDATA)>
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Data types to be used in BLAST4 "Lite"
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-common-options-db-restriction_organism (Blast4-common-options-db-restriction-by-organism)>
+
+
+<!ELEMENT Blast4-common-options-repeats-filtering (
+        Blast4-common-options-repeats-filtering_organism-taxid?)>
+
+<!-- defaults to human -->
+<!ELEMENT Blast4-common-options-repeats-filtering_organism-taxid (%INTEGER;)>
+
+
+<!ELEMENT Blast4-common-options-query-filtering (
+        Blast4-common-options-query-filtering_use-seg-filtering?, 
+        Blast4-common-options-query-filtering_use-dust-filtering?, 
+        Blast4-common-options-query-filtering_mask-for-lookup-table-only?, 
+        Blast4-common-options-query-filtering_repeats-filtering?, 
+        Blast4-common-options-query-filtering_user-specified-masks?, 
+        Blast4-common-options-query-filtering_no-filtering?)>
+
+<!-- use SEG filtering with default parameters -->
+<!ELEMENT Blast4-common-options-query-filtering_use-seg-filtering EMPTY>
+<!ATTLIST Blast4-common-options-query-filtering_use-seg-filtering value ( true | false ) #REQUIRED >
+
+
+<!-- use DUST filtering with default parameters -->
+<!ELEMENT Blast4-common-options-query-filtering_use-dust-filtering EMPTY>
+<!ATTLIST Blast4-common-options-query-filtering_use-dust-filtering value ( true | false ) #REQUIRED >
+
+
+<!-- mask for lookup table only (i.e.: soft masking) -->
+<!ELEMENT Blast4-common-options-query-filtering_mask-for-lookup-table-only EMPTY>
+<!ATTLIST Blast4-common-options-query-filtering_mask-for-lookup-table-only value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Blast4-common-options-query-filtering_repeats-filtering (Blast4-common-options-repeats-filtering)>
+
+<!-- user specified masking locations -->
+<!ELEMENT Blast4-common-options-query-filtering_user-specified-masks (Blast4-mask*)>
+
+<!-- This overrides all other filtering options -->
+<!ELEMENT Blast4-common-options-query-filtering_no-filtering EMPTY>
+<!ATTLIST Blast4-common-options-query-filtering_no-filtering value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT Blast4-common-options-discontiguous-megablast (
+        Blast4-common-options-discontiguous-megablast_template-type, 
+        Blast4-common-options-discontiguous-megablast_template-length)>
+
+<!ELEMENT Blast4-common-options-discontiguous-megablast_template-type (%INTEGER;)>
+
+<!ELEMENT Blast4-common-options-discontiguous-megablast_template-length (%INTEGER;)>
+
+
+<!ELEMENT Blast4-common-options-nucleotide-query (
+        Blast4-common-options-nucleotide-query_strand-type-list?, 
+        Blast4-common-options-nucleotide-query_disco-megablast-options?)>
+
+<!-- one per query -->
+<!ELEMENT Blast4-common-options-nucleotide-query_strand-type-list (Blast4-strand-type*)>
+
+<!ELEMENT Blast4-common-options-nucleotide-query_disco-megablast-options (Blast4-common-options-discontiguous-megablast)>
+
+
+<!ELEMENT Blast4-common-options-scoring (
+        Blast4-common-options-scoring_matrix-name?, 
+        Blast4-common-options-scoring_gap-opening-penalty?, 
+        Blast4-common-options-scoring_gap-extension-penalty?, 
+        Blast4-common-options-scoring_match-reward?, 
+        Blast4-common-options-scoring_mismatch-penalty?)>
+
+<!-- e.g.: BLOSUM62, PAM30, etc -->
+<!ELEMENT Blast4-common-options-scoring_matrix-name (#PCDATA)>
+
+<!ELEMENT Blast4-common-options-scoring_gap-opening-penalty (%INTEGER;)>
+
+<!ELEMENT Blast4-common-options-scoring_gap-extension-penalty (%INTEGER;)>
+
+<!ELEMENT Blast4-common-options-scoring_match-reward (%INTEGER;)>
+
+<!ELEMENT Blast4-common-options-scoring_mismatch-penalty (%INTEGER;)>
+
+
+<!ELEMENT Blast4-common-options (
+        Blast4-common-options_percent-identity?, 
+        Blast4-common-options_evalue?, 
+        Blast4-common-options_word-size?, 
+        Blast4-common-options_hitlist-size?, 
+        Blast4-common-options_db-restriction?, 
+        Blast4-common-options_query-filtering?, 
+        Blast4-common-options_nucl-query-options?, 
+        Blast4-common-options_scoring-options?, 
+        Blast4-common-options_phi-pattern?, 
+        Blast4-common-options_eff-search-space?, 
+        Blast4-common-options_comp-based-statistics?)>
+
+<!-- percent identity of matches (0-100) -->
+<!ELEMENT Blast4-common-options_percent-identity (%REAL;)>
+
+<!-- e-value threshold -->
+<!ELEMENT Blast4-common-options_evalue (%REAL;)>
+
+<!-- word size to use in lookup table construction -->
+<!ELEMENT Blast4-common-options_word-size (%INTEGER;)>
+
+<!-- max number of database sequences to align -->
+<!ELEMENT Blast4-common-options_hitlist-size (%INTEGER;)>
+
+<!ELEMENT Blast4-common-options_db-restriction (Blast4-common-options-db-restriction)>
+
+<!ELEMENT Blast4-common-options_query-filtering (Blast4-common-options-query-filtering)>
+
+<!ELEMENT Blast4-common-options_nucl-query-options (Blast4-common-options-nucleotide-query)>
+
+<!ELEMENT Blast4-common-options_scoring-options (Blast4-common-options-scoring)>
+
+<!-- PHI-BLAST pattern -->
+<!ELEMENT Blast4-common-options_phi-pattern (#PCDATA)>
+
+<!-- effective search space -->
+<!ELEMENT Blast4-common-options_eff-search-space (%REAL;)>
+
+<!-- Composition based statistics -->
+<!ELEMENT Blast4-common-options_comp-based-statistics (%INTEGER;)>
+
+
+<!ELEMENT Blast4-options-lite (
+        Blast4-options-lite_task, 
+        Blast4-options-lite_options?)>
+
+<!ELEMENT Blast4-options-lite_task (#PCDATA)>
+
+<!ELEMENT Blast4-options-lite_options (Blast4-common-options)>
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Other types in alphabetical order
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-cutoff (
+        Blast4-cutoff_e-value | 
+        Blast4-cutoff_raw-score)>
+
+<!ELEMENT Blast4-cutoff_e-value (%REAL;)>
+
+<!ELEMENT Blast4-cutoff_raw-score (%INTEGER;)>
+
+
+<!ELEMENT Blast4-database (
+        Blast4-database_name, 
+        Blast4-database_type)>
+
+<!ELEMENT Blast4-database_name (#PCDATA)>
+
+<!ELEMENT Blast4-database_type (Blast4-residue-type)>
+
+<!-- Borrowed from seq.asn -->
+<!ELEMENT Blast4-seqtech (%INTEGER;)>
+
+<!--
+    standard	-  standard sequencing
+    est	-  Expressed Sequence Tag
+    sts	-  Sequence Tagged Site
+    survey	-  one-pass genomic sequence
+    genemap	-  from genetic mapping techniques
+    physmap	-  from physical mapping techniques
+    derived	-  derived from other data, not a primary entity
+    concept-trans	-  conceptual translation
+    seq-pept	-  peptide was sequenced
+    both	-  concept transl. w/ partial pept. seq.
+    seq-pept-overlap	-  sequenced peptide, ordered by overlap
+    seq-pept-homol	-  sequenced peptide, ordered by homology
+    concept-trans-a	-  conceptual transl. supplied by author
+    htgs-1	-  unordered High Throughput sequence contig
+    htgs-2	-  ordered High Throughput sequence contig
+    htgs-3	-  finished High Throughput sequence
+    fli-cdna	-  full length insert cDNA
+    htgs-0	-  single genomic reads for coordination
+    htc	-  high throughput cDNA
+    wgs	-  whole genome shotgun sequencing
+    other	-  use Source.techexp
+-->
+<!ATTLIST Blast4-seqtech value (
+        unknown |
+        standard |
+        est |
+        sts |
+        survey |
+        genemap |
+        physmap |
+        derived |
+        concept-trans |
+        seq-pept |
+        both |
+        seq-pept-overlap |
+        seq-pept-homol |
+        concept-trans-a |
+        htgs-1 |
+        htgs-2 |
+        htgs-3 |
+        fli-cdna |
+        htgs-0 |
+        htc |
+        wgs |
+        other
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Blast4-database-info (
+        Blast4-database-info_database, 
+        Blast4-database-info_description, 
+        Blast4-database-info_last-updated, 
+        Blast4-database-info_total-length, 
+        Blast4-database-info_num-sequences, 
+        Blast4-database-info_seqtech, 
+        Blast4-database-info_taxid)>
+
+<!ELEMENT Blast4-database-info_database (Blast4-database)>
+
+<!ELEMENT Blast4-database-info_description (#PCDATA)>
+
+<!ELEMENT Blast4-database-info_last-updated (#PCDATA)>
+
+<!ELEMENT Blast4-database-info_total-length (%INTEGER;)>
+
+<!ELEMENT Blast4-database-info_num-sequences (%INTEGER;)>
+<!-- Borrowed from seq.asn -->
+<!ELEMENT Blast4-database-info_seqtech (Blast4-seqtech)>
+
+<!ELEMENT Blast4-database-info_taxid (%INTEGER;)>
+
+
+<!ELEMENT Blast4-frame-type %ENUM;>
+<!ATTLIST Blast4-frame-type value (
+        notset |
+        plus1 |
+        plus2 |
+        plus3 |
+        minus1 |
+        minus2 |
+        minus3
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Blast4-ka-block (
+        Blast4-ka-block_lambda, 
+        Blast4-ka-block_k, 
+        Blast4-ka-block_h, 
+        Blast4-ka-block_gapped)>
+
+<!ELEMENT Blast4-ka-block_lambda (%REAL;)>
+
+<!ELEMENT Blast4-ka-block_k (%REAL;)>
+
+<!ELEMENT Blast4-ka-block_h (%REAL;)>
+
+<!ELEMENT Blast4-ka-block_gapped EMPTY>
+<!ATTLIST Blast4-ka-block_gapped value ( true | false ) #REQUIRED >
+
+
+<!--
+ Masking locations for a query's frame. The locations field is a single
+ Seq-loc of type Packed-int, which contains all the masking locations for the
+ translation frame specified by the frame field.
+ Notes:
+ On input (i.e.: when the client specifies masking locations as a
+ Blast4-parameter), in the case of protein queries, the frame field must 
+ always be notset, in the case of nucleotide queries (regardless of whether 
+ the search will translate these or not), the frame must be plus1. Masking 
+ locations in the translated encoding are not permitted.
+ On output (i.e.: when blast 4 server encodes these as part of the 
+ Blast4-get-search-results-reply), the same conventions as above apply for
+ non-translated protein and nucleotide queries, but in the case of translated
+ nucleotide queries, the frame field can be specified in any of the
+ translation frames as appropriate.
+-->
+<!ELEMENT Blast4-mask (
+        Blast4-mask_locations, 
+        Blast4-mask_frame)>
+
+<!ELEMENT Blast4-mask_locations (Seq-loc*)>
+
+<!ELEMENT Blast4-mask_frame (Blast4-frame-type)>
+
+
+<!ELEMENT Blast4-matrix-id (
+        Blast4-matrix-id_residue-type, 
+        Blast4-matrix-id_name)>
+
+<!ELEMENT Blast4-matrix-id_residue-type (Blast4-residue-type)>
+
+<!ELEMENT Blast4-matrix-id_name (#PCDATA)>
+
+
+<!ELEMENT Blast4-parameter (
+        Blast4-parameter_name, 
+        Blast4-parameter_value)>
+
+<!ELEMENT Blast4-parameter_name (#PCDATA)>
+
+<!ELEMENT Blast4-parameter_value (Blast4-value)>
+
+
+<!ELEMENT Blast4-parameter-info (
+        Blast4-parameter-info_name, 
+        Blast4-parameter-info_type)>
+
+<!ELEMENT Blast4-parameter-info_name (#PCDATA)>
+
+<!ELEMENT Blast4-parameter-info_type (#PCDATA)>
+
+<!-- Self documenting task structure -->
+<!ELEMENT Blast4-task-info (
+        Blast4-task-info_name, 
+        Blast4-task-info_documentation)>
+
+<!-- Name of this task -->
+<!ELEMENT Blast4-task-info_name (#PCDATA)>
+
+<!-- Description of the task -->
+<!ELEMENT Blast4-task-info_documentation (#PCDATA)>
+
+
+<!ELEMENT Blast4-program-info (
+        Blast4-program-info_program, 
+        Blast4-program-info_services)>
+
+<!ELEMENT Blast4-program-info_program (#PCDATA)>
+
+<!ELEMENT Blast4-program-info_services (Blast4-program-info_services_E*)>
+
+
+<!ELEMENT Blast4-program-info_services_E (#PCDATA)>
+
+
+<!ELEMENT Blast4-residue-type %ENUM;>
+<!ATTLIST Blast4-residue-type value (
+        unknown |
+        protein |
+        nucleotide
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Blast4-strand-type %ENUM;>
+<!ATTLIST Blast4-strand-type value (
+        forward-strand |
+        reverse-strand |
+        both-strands
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Blast4-subject (
+        Blast4-subject_database | 
+        Blast4-subject_sequences | 
+        Blast4-subject_seq-loc-list)>
+
+<!ELEMENT Blast4-subject_database (#PCDATA)>
+
+<!ELEMENT Blast4-subject_sequences (Bioseq*)>
+
+<!ELEMENT Blast4-subject_seq-loc-list (Seq-loc*)>
+
+
+<!ELEMENT Blast4-parameters (Blast4-parameter*)>
+
+
+<!ELEMENT Blast4-phi-alignments (
+        Blast4-phi-alignments_num-alignments, 
+        Blast4-phi-alignments_seq-locs)>
+
+<!ELEMENT Blast4-phi-alignments_num-alignments (%INTEGER;)>
+
+<!ELEMENT Blast4-phi-alignments_seq-locs (Seq-loc*)>
+
+
+<!ELEMENT Blast4-value (
+        Blast4-value_big-integer | 
+        Blast4-value_bioseq | 
+        Blast4-value_boolean | 
+        Blast4-value_cutoff | 
+        Blast4-value_integer | 
+        Blast4-value_matrix | 
+        Blast4-value_real | 
+        Blast4-value_seq-align | 
+        Blast4-value_seq-id | 
+        Blast4-value_seq-loc | 
+        Blast4-value_strand-type | 
+        Blast4-value_string | 
+        Blast4-value_big-integer-list | 
+        Blast4-value_bioseq-list | 
+        Blast4-value_boolean-list | 
+        Blast4-value_cutoff-list | 
+        Blast4-value_integer-list | 
+        Blast4-value_matrix-list | 
+        Blast4-value_real-list | 
+        Blast4-value_seq-align-list | 
+        Blast4-value_seq-id-list | 
+        Blast4-value_seq-loc-list | 
+        Blast4-value_strand-type-list | 
+        Blast4-value_string-list | 
+        Blast4-value_bioseq-set | 
+        Blast4-value_seq-align-set | 
+        Blast4-value_query-mask)>
+
+<!-- scalar types -->
+<!ELEMENT Blast4-value_big-integer (%INTEGER;)>
+
+<!ELEMENT Blast4-value_bioseq (Bioseq)>
+
+<!ELEMENT Blast4-value_boolean EMPTY>
+<!ATTLIST Blast4-value_boolean value ( true | false ) #REQUIRED >
+
+<!--
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Other types in alphabetical order
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT Blast4-value_cutoff (Blast4-cutoff)>
+
+<!ELEMENT Blast4-value_integer (%INTEGER;)>
+
+<!ELEMENT Blast4-value_matrix (PssmWithParameters)>
+
+<!ELEMENT Blast4-value_real (%REAL;)>
+
+<!ELEMENT Blast4-value_seq-align (Seq-align)>
+
+<!ELEMENT Blast4-value_seq-id (Seq-id)>
+
+<!ELEMENT Blast4-value_seq-loc (Seq-loc)>
+
+<!ELEMENT Blast4-value_strand-type (Blast4-strand-type)>
+
+<!ELEMENT Blast4-value_string (#PCDATA)>
+
+<!-- lists of scalar types -->
+<!ELEMENT Blast4-value_big-integer-list (Blast4-value_big-integer-list_E*)>
+
+
+<!ELEMENT Blast4-value_big-integer-list_E (%INTEGER;)>
+
+<!ELEMENT Blast4-value_bioseq-list (Bioseq*)>
+
+<!ELEMENT Blast4-value_boolean-list (Blast4-value_boolean-list_E*)>
+
+
+<!ELEMENT Blast4-value_boolean-list_E EMPTY>
+<!ATTLIST Blast4-value_boolean-list_E value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Blast4-value_cutoff-list (Blast4-cutoff*)>
+
+<!ELEMENT Blast4-value_integer-list (Blast4-value_integer-list_E*)>
+
+
+<!ELEMENT Blast4-value_integer-list_E (%INTEGER;)>
+
+<!ELEMENT Blast4-value_matrix-list (PssmWithParameters*)>
+
+<!ELEMENT Blast4-value_real-list (Blast4-value_real-list_E*)>
+
+
+<!ELEMENT Blast4-value_real-list_E (%REAL;)>
+
+<!ELEMENT Blast4-value_seq-align-list (Seq-align*)>
+
+<!ELEMENT Blast4-value_seq-id-list (Seq-id*)>
+
+<!ELEMENT Blast4-value_seq-loc-list (Seq-loc*)>
+
+<!ELEMENT Blast4-value_strand-type-list (Blast4-strand-type*)>
+
+<!ELEMENT Blast4-value_string-list (Blast4-value_string-list_E*)>
+
+
+<!ELEMENT Blast4-value_string-list_E (#PCDATA)>
+
+<!-- imported collection types -->
+<!ELEMENT Blast4-value_bioseq-set (Bioseq-set)>
+
+<!ELEMENT Blast4-value_seq-align-set (Seq-align-set)>
+
+<!--
+ Intended to represent user-provided masking locations for a single query
+ sequence (name field in Blast4-parameter should be "LCaseMask").
+ Multiple Blast4-parameters of this type are needed to specify masking
+ locations for multiple queries.
+-->
+<!ELEMENT Blast4-value_query-mask (Blast4-mask)>
+
+<!-- Complete set of simple Blast results -->
+<!ELEMENT Blast4-simple-results (
+        Blast4-simple-results_all-alignments)>
+
+<!ELEMENT Blast4-simple-results_all-alignments (Blast4-alignments-for-query*)>
+
+<!-- Alignments for one query, compiled from the raw SeqAlign results -->
+<!ELEMENT Blast4-alignments-for-query (
+        Blast4-alignments-for-query_query-id, 
+        Blast4-alignments-for-query_alignments)>
+
+<!--
+ Query sequence identifier
+ (present if query is not a local id in the SeqAlign)
+-->
+<!ELEMENT Blast4-alignments-for-query_query-id (#PCDATA)>
+
+<!-- All the alignments for this query -->
+<!ELEMENT Blast4-alignments-for-query_alignments (Blast4-simple-alignment*)>
+
+<!-- A single alignment -->
+<!ELEMENT Blast4-simple-alignment (
+        Blast4-simple-alignment_subject-id, 
+        Blast4-simple-alignment_e-value, 
+        Blast4-simple-alignment_bit-score, 
+        Blast4-simple-alignment_num-identities?, 
+        Blast4-simple-alignment_num-indels?, 
+        Blast4-simple-alignment_full-query-range, 
+        Blast4-simple-alignment_full-subject-range)>
+
+<!--
+ Subject sequence identifier
+ (normally a GI from the SeqAlign)
+-->
+<!ELEMENT Blast4-simple-alignment_subject-id (#PCDATA)>
+
+<!-- E-Value -->
+<!ELEMENT Blast4-simple-alignment_e-value (%REAL;)>
+
+<!-- Bit score -->
+<!ELEMENT Blast4-simple-alignment_bit-score (%REAL;)>
+
+<!-- Number of identities -->
+<!ELEMENT Blast4-simple-alignment_num-identities (%INTEGER;)>
+
+<!-- Number of insertions/deletions -->
+<!ELEMENT Blast4-simple-alignment_num-indels (%INTEGER;)>
+
+<!-- Full query range covered by this HSP -->
+<!ELEMENT Blast4-simple-alignment_full-query-range (Blast4-range)>
+
+<!-- Full subject range covered by this HSP -->
+<!ELEMENT Blast4-simple-alignment_full-subject-range (Blast4-range)>
+
+<!-- Range on a sequence - zero offset -->
+<!ELEMENT Blast4-range (
+        Blast4-range_start?, 
+        Blast4-range_end?, 
+        Blast4-range_strand?)>
+
+<!ELEMENT Blast4-range_start (%INTEGER;)>
+
+<!ELEMENT Blast4-range_end (%INTEGER;)>
+
+<!--
+ The frame of the range (absent for proteins; -1/1 for nucleotides;
+ -1,-2,-3,1,2,3 for translated sequences)
+-->
+<!ELEMENT Blast4-range_strand (%INTEGER;)>
+
diff --git a/dtd/NCBI_BlastDL.dtd b/dtd/NCBI_BlastDL.dtd
new file mode 100644
index 0000000..451e782
--- /dev/null
+++ b/dtd/NCBI_BlastDL.dtd
@@ -0,0 +1,89 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "blastdb.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_BlastDL.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_BlastDL_module PUBLIC "-//NCBI//NCBI BlastDL Module//EN" "NCBI_BlastDL.mod.dtd">
+%NCBI_BlastDL_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_BlastDL.mod.dtd b/dtd/NCBI_BlastDL.mod.dtd
new file mode 100644
index 0000000..78a99bb
--- /dev/null
+++ b/dtd/NCBI_BlastDL.mod.dtd
@@ -0,0 +1,138 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "blastdb.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 07/15/2011 23:04:47
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-BlastDL"
+================================================= -->
+
+<!--
+$Id: blastdb.asn 311249 2011-07-11 14:12:16Z camacho $
+
+ Notes:
+
+ taxonomy: an integer is proposed, which would require some sort of 
+ table (or network connection) to do the conversions from integer 
+ to various names.  This could save quite a bit of space for databases 
+ that are predominantly of one organism (e.g., human in htgs).
+ I've proposed here that table contain scientific-, common-, and 
+ blast-names at the advice of Scott Federhen.  Scott also was in 
+ favor of having the complete lineage in the file, but it seems like 
+ this would be seldom used and we could have a view with a link back 
+ to the taxonomy page for anyone needing it. Since one file would 
+ suffice for all blast databases, it seems like this should be a new file.
+
+ memberships: a sequence of integers is proposed.  Each bit of an integer 
+ would indicate membership in some (virtual) blast database (e.g., pdb, 
+ swissprot) or some classification (e.g., mRNA, genomic).
+
+ links: a sequence of integers is proposed.  Each bit of an integer would 
+ indicate a link that could be established based upon the gi of the 
+ database sequence.
+
+-->
+
+<!-- Elements used by other modules:
+          Blast-def-line-set,
+          Blast-def-line -->
+
+<!-- Elements referenced from other modules:
+          Seq-id,
+          Seq-loc FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+<!-- all deflines for an entry -->
+<!ELEMENT Blast-def-line-set (Blast-def-line*)>
+
+
+<!ELEMENT Blast-def-line (
+        Blast-def-line_title?, 
+        Blast-def-line_seqid, 
+        Blast-def-line_taxid?, 
+        Blast-def-line_memberships?, 
+        Blast-def-line_links?, 
+        Blast-def-line_other-info?)>
+
+<!-- simple title -->
+<!ELEMENT Blast-def-line_title (#PCDATA)>
+
+<!-- Regular NCBI Seq-Id -->
+<!ELEMENT Blast-def-line_seqid (Seq-id*)>
+
+<!-- taxonomy id -->
+<!ELEMENT Blast-def-line_taxid (%INTEGER;)>
+
+<!-- bit arrays -->
+<!ELEMENT Blast-def-line_memberships (Blast-def-line_memberships_E*)>
+
+
+<!ELEMENT Blast-def-line_memberships_E (%INTEGER;)>
+
+<!-- DEPRECATED, replaced by LinkoutDB -->
+<!ELEMENT Blast-def-line_links (Blast-def-line_links_E*)>
+
+
+<!ELEMENT Blast-def-line_links_E (%INTEGER;)>
+
+<!-- for future use (probably genomic sequences) -->
+<!ELEMENT Blast-def-line_other-info (Blast-def-line_other-info_E*)>
+
+
+<!ELEMENT Blast-def-line_other-info_E (%INTEGER;)>
+
+<!--
+ This defines the possible sequence filtering algorithms to be used in a
+ BLAST database
+-->
+<!ELEMENT Blast-filter-program (%INTEGER;)>
+<!ATTLIST Blast-filter-program value (
+        not-set |
+        dust |
+        seg |
+        windowmasker |
+        repeat |
+        other |
+        max
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Blast-mask-list (
+        Blast-mask-list_masks, 
+        Blast-mask-list_more)>
+
+<!-- masks for a single sequence should be grouped in a Packed-seqint -->
+<!ELEMENT Blast-mask-list_masks (Seq-loc*)>
+
+<!--
+ as of 01/21/2010, this field is set to false always, indicating that the
+ entire object (set of Seq-loc) is contained in this object
+-->
+<!ELEMENT Blast-mask-list_more EMPTY>
+<!ATTLIST Blast-mask-list_more value ( true | false ) #REQUIRED >
+
+
+<!-- Defines the masking information for a set of sequences -->
+<!ELEMENT Blast-db-mask-info (
+        Blast-db-mask-info_algo-id, 
+        Blast-db-mask-info_algo-program, 
+        Blast-db-mask-info_algo-options, 
+        Blast-db-mask-info_masks)>
+
+<!ELEMENT Blast-db-mask-info_algo-id (%INTEGER;)>
+<!--
+ This defines the possible sequence filtering algorithms to be used in a
+ BLAST database
+-->
+<!ELEMENT Blast-db-mask-info_algo-program (Blast-filter-program)>
+
+<!ELEMENT Blast-db-mask-info_algo-options (#PCDATA)>
+
+<!--
+ This object was originally created to allow pagination of the sequence
+ masks, but this feature was discontinued in 01/21/2010
+-->
+<!ELEMENT Blast-db-mask-info_masks (Blast-mask-list)>
+
diff --git a/dtd/NCBI_BlastOutput.dtd b/dtd/NCBI_BlastOutput.dtd
new file mode 100644
index 0000000..307176a
--- /dev/null
+++ b/dtd/NCBI_BlastOutput.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "blastxml.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_BlastOutput.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_BlastOutput_module PUBLIC "-//NCBI//NCBI BlastOutput Module//EN" "NCBI_BlastOutput.mod.dtd">
+%NCBI_BlastOutput_module;
diff --git a/dtd/NCBI_BlastOutput.mod.dtd b/dtd/NCBI_BlastOutput.mod.dtd
new file mode 100644
index 0000000..7b0f47f
--- /dev/null
+++ b/dtd/NCBI_BlastOutput.mod.dtd
@@ -0,0 +1,273 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "blastxml.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-BlastOutput"
+================================================= -->
+
+<!--$Id: blastxml.asn 100080 2007-03-12 16:05:35Z kazimird $ -->
+
+
+<!ELEMENT BlastOutput (
+        BlastOutput_program, 
+        BlastOutput_version, 
+        BlastOutput_reference, 
+        BlastOutput_db, 
+        BlastOutput_query-ID, 
+        BlastOutput_query-def, 
+        BlastOutput_query-len, 
+        BlastOutput_query-seq?, 
+        BlastOutput_param, 
+        BlastOutput_iterations, 
+        BlastOutput_mbstat?)>
+
+<!-- BLAST program: blastp, tblastx etc. -->
+<!ELEMENT BlastOutput_program (#PCDATA)>
+
+<!-- Program version  -->
+<!ELEMENT BlastOutput_version (#PCDATA)>
+
+<!-- Steven, David, Tom and others -->
+<!ELEMENT BlastOutput_reference (#PCDATA)>
+
+<!-- BLAST Database name -->
+<!ELEMENT BlastOutput_db (#PCDATA)>
+
+<!-- SeqId of query -->
+<!ELEMENT BlastOutput_query-ID (#PCDATA)>
+
+<!-- Definition line of query -->
+<!ELEMENT BlastOutput_query-def (#PCDATA)>
+
+<!-- length of query sequence -->
+<!ELEMENT BlastOutput_query-len (%INTEGER;)>
+
+<!-- query sequence itself -->
+<!ELEMENT BlastOutput_query-seq (#PCDATA)>
+
+<!-- search parameters -->
+<!ELEMENT BlastOutput_param (Parameters)>
+
+<!ELEMENT BlastOutput_iterations (Iteration*)>
+
+<!-- Mega BLAST search statistics -->
+<!ELEMENT BlastOutput_mbstat (Statistics)>
+
+
+<!ELEMENT Iteration (
+        Iteration_iter-num, 
+        Iteration_query-ID?, 
+        Iteration_query-def?, 
+        Iteration_query-len?, 
+        Iteration_hits?, 
+        Iteration_stat?, 
+        Iteration_message?)>
+
+<!-- iteration number -->
+<!ELEMENT Iteration_iter-num (%INTEGER;)>
+
+<!-- SeqId of query -->
+<!ELEMENT Iteration_query-ID (#PCDATA)>
+
+<!-- Definition line of query -->
+<!ELEMENT Iteration_query-def (#PCDATA)>
+
+<!-- length of query sequence -->
+<!ELEMENT Iteration_query-len (%INTEGER;)>
+
+<!-- Hits one for every db sequence -->
+<!ELEMENT Iteration_hits (Hit*)>
+
+<!-- search statistics             -->
+<!ELEMENT Iteration_stat (Statistics)>
+
+<!-- Some (error?) information -->
+<!ELEMENT Iteration_message (#PCDATA)>
+
+
+<!ELEMENT Parameters (
+        Parameters_matrix?, 
+        Parameters_expect, 
+        Parameters_include?, 
+        Parameters_sc-match?, 
+        Parameters_sc-mismatch?, 
+        Parameters_gap-open, 
+        Parameters_gap-extend, 
+        Parameters_filter?, 
+        Parameters_pattern?, 
+        Parameters_entrez-query?)>
+
+<!-- Matrix used (-M) -->
+<!ELEMENT Parameters_matrix (#PCDATA)>
+
+<!-- Expectation threshold (-e) -->
+<!ELEMENT Parameters_expect (%REAL;)>
+
+<!-- Inclusion threshold (-h) -->
+<!ELEMENT Parameters_include (%REAL;)>
+
+<!-- match score for NT (-r) -->
+<!ELEMENT Parameters_sc-match (%INTEGER;)>
+
+<!-- mismatch score for NT (-q) -->
+<!ELEMENT Parameters_sc-mismatch (%INTEGER;)>
+
+<!-- Gap opening cost (-G) -->
+<!ELEMENT Parameters_gap-open (%INTEGER;)>
+
+<!-- Gap extension cost (-E) -->
+<!ELEMENT Parameters_gap-extend (%INTEGER;)>
+
+<!-- Filtering options (-F) -->
+<!ELEMENT Parameters_filter (#PCDATA)>
+
+<!-- PHI-BLAST pattern -->
+<!ELEMENT Parameters_pattern (#PCDATA)>
+
+<!-- Limit of request to Entrez query -->
+<!ELEMENT Parameters_entrez-query (#PCDATA)>
+
+
+<!ELEMENT Statistics (
+        Statistics_db-num, 
+        Statistics_db-len, 
+        Statistics_hsp-len, 
+        Statistics_eff-space, 
+        Statistics_kappa, 
+        Statistics_lambda, 
+        Statistics_entropy)>
+
+<!-- Number of sequences in BLAST db -->
+<!ELEMENT Statistics_db-num (%INTEGER;)>
+
+<!-- Length of BLAST db -->
+<!ELEMENT Statistics_db-len (%INTEGER;)>
+
+<!-- Effective HSP length -->
+<!ELEMENT Statistics_hsp-len (%INTEGER;)>
+
+<!-- Effective search space -->
+<!ELEMENT Statistics_eff-space (%REAL;)>
+
+<!-- Karlin-Altschul parameter K -->
+<!ELEMENT Statistics_kappa (%REAL;)>
+
+<!-- Karlin-Altschul parameter Lambda -->
+<!ELEMENT Statistics_lambda (%REAL;)>
+
+<!-- Karlin-Altschul parameter H -->
+<!ELEMENT Statistics_entropy (%REAL;)>
+
+
+<!ELEMENT Hit (
+        Hit_num, 
+        Hit_id, 
+        Hit_def, 
+        Hit_accession, 
+        Hit_len, 
+        Hit_hsps?)>
+
+<!-- hit number -->
+<!ELEMENT Hit_num (%INTEGER;)>
+
+<!-- SeqId of subject -->
+<!ELEMENT Hit_id (#PCDATA)>
+
+<!-- definition line of subject -->
+<!ELEMENT Hit_def (#PCDATA)>
+
+<!-- accession -->
+<!ELEMENT Hit_accession (#PCDATA)>
+
+<!-- length of subject -->
+<!ELEMENT Hit_len (%INTEGER;)>
+
+<!-- all HSP regions for the given subject -->
+<!ELEMENT Hit_hsps (Hsp*)>
+
+
+<!ELEMENT Hsp (
+        Hsp_num, 
+        Hsp_bit-score, 
+        Hsp_score, 
+        Hsp_evalue, 
+        Hsp_query-from, 
+        Hsp_query-to, 
+        Hsp_hit-from, 
+        Hsp_hit-to, 
+        Hsp_pattern-from?, 
+        Hsp_pattern-to?, 
+        Hsp_query-frame?, 
+        Hsp_hit-frame?, 
+        Hsp_identity?, 
+        Hsp_positive?, 
+        Hsp_gaps?, 
+        Hsp_align-len?, 
+        Hsp_density?, 
+        Hsp_qseq, 
+        Hsp_hseq, 
+        Hsp_midline?)>
+
+<!-- HSP number -->
+<!ELEMENT Hsp_num (%INTEGER;)>
+
+<!-- score (in bits) of HSP -->
+<!ELEMENT Hsp_bit-score (%REAL;)>
+
+<!-- score of HSP -->
+<!ELEMENT Hsp_score (%REAL;)>
+
+<!-- e-value of HSP -->
+<!ELEMENT Hsp_evalue (%REAL;)>
+
+<!-- start of HSP in query -->
+<!ELEMENT Hsp_query-from (%INTEGER;)>
+
+<!-- end of HSP -->
+<!ELEMENT Hsp_query-to (%INTEGER;)>
+
+<!-- start of HSP in subject -->
+<!ELEMENT Hsp_hit-from (%INTEGER;)>
+
+<!-- end of HSP in subject -->
+<!ELEMENT Hsp_hit-to (%INTEGER;)>
+
+<!-- start of PHI-BLAST pattern -->
+<!ELEMENT Hsp_pattern-from (%INTEGER;)>
+
+<!-- end of PHI-BLAST pattern -->
+<!ELEMENT Hsp_pattern-to (%INTEGER;)>
+
+<!-- translation frame of query -->
+<!ELEMENT Hsp_query-frame (%INTEGER;)>
+
+<!-- translation frame of subject -->
+<!ELEMENT Hsp_hit-frame (%INTEGER;)>
+
+<!-- number of identities in HSP -->
+<!ELEMENT Hsp_identity (%INTEGER;)>
+
+<!-- number of positives in HSP -->
+<!ELEMENT Hsp_positive (%INTEGER;)>
+
+<!-- number of gaps in HSP -->
+<!ELEMENT Hsp_gaps (%INTEGER;)>
+
+<!-- length of the alignment used -->
+<!ELEMENT Hsp_align-len (%INTEGER;)>
+
+<!-- score density -->
+<!ELEMENT Hsp_density (%INTEGER;)>
+
+<!-- alignment string for the query (with gaps) -->
+<!ELEMENT Hsp_qseq (#PCDATA)>
+
+<!-- alignment string for subject (with gaps) -->
+<!ELEMENT Hsp_hseq (#PCDATA)>
+
+<!-- formating middle line -->
+<!ELEMENT Hsp_midline (#PCDATA)>
+
diff --git a/dtd/NCBI_Cdd.dtd b/dtd/NCBI_Cdd.dtd
new file mode 100644
index 0000000..b2d06ad
--- /dev/null
+++ b/dtd/NCBI_Cdd.dtd
@@ -0,0 +1,110 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "cdd.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Cdd.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Cdd_module PUBLIC "-//NCBI//NCBI Cdd Module//EN" "NCBI_Cdd.mod.dtd">
+%NCBI_Cdd_module;
+
+<!ENTITY % NCBI_Cn3d_module PUBLIC "-//NCBI//NCBI Cn3d Module//EN" "NCBI_Cn3d.mod.dtd">
+%NCBI_Cn3d_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_ScoreMat_module PUBLIC "-//NCBI//NCBI ScoreMat Module//EN" "NCBI_ScoreMat.mod.dtd">
+%NCBI_ScoreMat_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Cdd.mod.dtd b/dtd/NCBI_Cdd.mod.dtd
new file mode 100644
index 0000000..7cf68d6
--- /dev/null
+++ b/dtd/NCBI_Cdd.mod.dtd
@@ -0,0 +1,1088 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "cdd.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Cdd"
+================================================= -->
+
+<!--
+$Revision: 194512 $
+**********************************************************************
+
+  Definitions for CDD's 
+
+  NCBI Structure Group
+
+  National Center for Biotechnology Information
+  National Institutes of Health
+  Bethesda, MD 20894 USA
+
+  October 1999
+
+  asntool -m cdd.asn -w 100 -o cdd.h
+  asntool -B objcdd -m cdd.asn -G -w 100 -I objseq.h objsset.h -K cdd.h \
+          -M asn.all
+**********************************************************************
+ NCBI Conserved Domain Definition
+-->
+
+<!-- Elements used by other modules:
+          Cdd-id,
+          Cdd-id-set,
+          Cdd,
+          Cdd-set,
+          Cdd-tree,
+          Cdd-tree-set,
+          Cdd-pref-nodes,
+          Cdd-Project -->
+
+<!-- Elements referenced from other modules:
+          Date FROM NCBI-General,
+          Pub FROM NCBI-Pub,
+          Biostruc-annot-set FROM MMDB,
+          Bioseq FROM NCBI-Sequence,
+          Seq-annot FROM NCBI-Sequence,
+          Seq-entry FROM NCBI-Seqset,
+          Org-ref FROM NCBI-Organism,
+          Seq-id FROM NCBI-Seqloc,
+          Seq-interval FROM NCBI-Seqloc,
+          Seq-loc FROM NCBI-Seqloc,
+          Seq-feat FROM NCBI-Seqfeat,
+          Score-set FROM NCBI-Seqalign,
+          Cn3d-style-dictionary,
+          Cn3d-user-annotations FROM NCBI-Cn3d,
+          PssmWithParameters FROM NCBI-ScoreMat -->
+<!-- ============================================ -->
+
+<!-- dealing with lists of preferred tax-nodes  -->
+<!ELEMENT Cdd-org-ref (
+        Cdd-org-ref_reference, 
+        Cdd-org-ref_active?, 
+        Cdd-org-ref_parent-tax-id?, 
+        Cdd-org-ref_rank?)>
+
+<!ELEMENT Cdd-org-ref_reference (Org-ref)>
+
+<!ELEMENT Cdd-org-ref_active EMPTY>
+<!ATTLIST Cdd-org-ref_active value ( true | false ) "true" >
+
+
+<!ELEMENT Cdd-org-ref_parent-tax-id (%INTEGER;)>
+
+<!ELEMENT Cdd-org-ref_rank (#PCDATA)>
+
+
+<!ELEMENT Cdd-org-ref-set (Cdd-org-ref*)>
+
+
+<!ELEMENT Cdd-pref-node-descr (
+        Cdd-pref-node-descr_create-date | 
+        Cdd-pref-node-descr_description)>
+
+<!ELEMENT Cdd-pref-node-descr_create-date (Date)>
+
+<!ELEMENT Cdd-pref-node-descr_description (#PCDATA)>
+
+
+<!ELEMENT Cdd-pref-node-descr-set (Cdd-pref-node-descr*)>
+
+
+<!ELEMENT Cdd-pref-nodes (
+        Cdd-pref-nodes_preferred-nodes, 
+        Cdd-pref-nodes_model-organisms?, 
+        Cdd-pref-nodes_optional-nodes?, 
+        Cdd-pref-nodes_description?)>
+
+<!ELEMENT Cdd-pref-nodes_preferred-nodes (Cdd-org-ref-set)>
+
+<!ELEMENT Cdd-pref-nodes_model-organisms (Cdd-org-ref-set)>
+
+<!ELEMENT Cdd-pref-nodes_optional-nodes (Cdd-org-ref-set)>
+
+<!ELEMENT Cdd-pref-nodes_description (Cdd-pref-node-descr-set)>
+
+<!--
+ Cdd's should not exist without a unique accession, but alternative id's may
+ be present as well. It is conceivable that a CD which is created as a merged
+ product of two highly redundant CDs will retain the source ids in addition 
+ to its new unique id
+ database the object resides in
+ currently not in use
+-->
+<!ELEMENT Global-id (
+        Global-id_accession, 
+        Global-id_release?, 
+        Global-id_version?, 
+        Global-id_database?)>
+
+<!-- SMART, Pfam, LOAD or CD accession -->
+<!ELEMENT Global-id_accession (#PCDATA)>
+
+<!--
+ to hold CD-Database release number
+ if desired, currently not used
+-->
+<!ELEMENT Global-id_release (#PCDATA)>
+
+<!--
+ version 0 is the seed, version
+ numbers increase with update/curate
+ cycles
+-->
+<!ELEMENT Global-id_version (%INTEGER;)>
+
+<!-- this is NOT the source!, rather the -->
+<!ELEMENT Global-id_database (#PCDATA)>
+
+
+<!ELEMENT Cdd-id (
+        Cdd-id_uid | 
+        Cdd-id_gid)>
+
+<!--
+ for synchronization with Entrez
+ holds PSSM-Ids
+-->
+<!ELEMENT Cdd-id_uid (%INTEGER;)>
+
+<!-- holds accession/version pairs -->
+<!ELEMENT Cdd-id_gid (Global-id)>
+
+
+<!ELEMENT Cdd-id-set (Cdd-id*)>
+
+<!--
+ record whether the CD contains
+ repeated sequence/structure motifs
+-->
+<!ELEMENT Cdd-repeat (
+        Cdd-repeat_count, 
+        Cdd-repeat_location?, 
+        Cdd-repeat_avglen?)>
+
+<!-- number of tandem repeats in the CD -->
+<!ELEMENT Cdd-repeat_count (%INTEGER;)>
+
+<!-- location on the representative -->
+<!ELEMENT Cdd-repeat_location (Seq-loc)>
+
+<!-- average repeat length -->
+<!ELEMENT Cdd-repeat_avglen (%INTEGER;)>
+
+<!-- record a link to Entrez Books -->
+<!ELEMENT Cdd-book-ref (
+        Cdd-book-ref_bookname, 
+        Cdd-book-ref_textelement, 
+        Cdd-book-ref_elementid?, 
+        Cdd-book-ref_subelementid?, 
+        Cdd-book-ref_celementid?, 
+        Cdd-book-ref_csubelementid?)>
+
+<!-- abbreviated book title -->
+<!ELEMENT Cdd-book-ref_bookname (#PCDATA)>
+
+<!ELEMENT Cdd-book-ref_textelement %ENUM;>
+
+<!--
+    unassigned	-  type of element 
+    section	-  a section or paragraph
+    figgrp	-  a figure or set of figures
+    table	-  a table
+    chapter	-  a whole chapter
+    biblist	-  a lisf of references
+    box	-  an inserted box
+    glossary	-  glossary
+    appendix	-  appendix
+-->
+<!ATTLIST Cdd-book-ref_textelement value (
+        unassigned |
+        section |
+        figgrp |
+        table |
+        chapter |
+        biblist |
+        box |
+        glossary |
+        appendix |
+        other
+        ) #REQUIRED >
+
+
+<!-- numerical address of the text-element -->
+<!ELEMENT Cdd-book-ref_elementid (%INTEGER;)>
+
+<!-- exact address, used with section -->
+<!ELEMENT Cdd-book-ref_subelementid (%INTEGER;)>
+
+<!-- address of the text element, if character string -->
+<!ELEMENT Cdd-book-ref_celementid (#PCDATA)>
+
+<!-- exact address, if character string -->
+<!ELEMENT Cdd-book-ref_csubelementid (#PCDATA)>
+
+<!--
+ The description of CDD's refers to the specific set of aligned sequences,
+ the region that is being aligned and the information contained in the
+ alignment. It may contain a lengthy comment
+ describing the function of the domain as well as its origin and all
+ other anecdotal information that can't be pressed into a rigid scheme.
+ Crosslinks to reference papers available in PubMed are possible as well.
+ There can be as many of these as you want in the CDD.
+-->
+<!ELEMENT Cdd-descr (
+        Cdd-descr_othername | 
+        Cdd-descr_category | 
+        Cdd-descr_comment | 
+        Cdd-descr_reference | 
+        Cdd-descr_create-date | 
+        Cdd-descr_tax-source | 
+        Cdd-descr_source | 
+        Cdd-descr_status | 
+        Cdd-descr_update-date | 
+        Cdd-descr_scrapbook | 
+        Cdd-descr_source-id | 
+        Cdd-descr_repeats | 
+        Cdd-descr_old-root | 
+        Cdd-descr_curation-status | 
+        Cdd-descr_readonly-status | 
+        Cdd-descr_book-ref | 
+        Cdd-descr_attribution | 
+        Cdd-descr_title)>
+
+<!--
+ alternative names for the CDD
+ if domain has several common names
+-->
+<!ELEMENT Cdd-descr_othername (#PCDATA)>
+
+<!--
+ intracellular, extracellular, etc.
+ to record spatial and/or temporal
+ expression in free-text format
+-->
+<!ELEMENT Cdd-descr_category (#PCDATA)>
+
+<!-- this is where descriptions go -->
+<!ELEMENT Cdd-descr_comment (#PCDATA)>
+
+<!-- a citation describing the domain -->
+<!ELEMENT Cdd-descr_reference (Pub)>
+
+<!-- Date of first creation/dump -->
+<!ELEMENT Cdd-descr_create-date (Date)>
+
+<!-- holds the highest common tax node -->
+<!ELEMENT Cdd-descr_tax-source (Org-ref)>
+
+<!--
+ the database the seeds were created
+ from, e.g. SMART, PFAM, etc..
+-->
+<!ELEMENT Cdd-descr_source (#PCDATA)>
+
+<!ELEMENT Cdd-descr_status (%INTEGER;)>
+
+<!--
+    finished-ok	-  a public curated CD
+    pending-release	-  needs work done, not yet released
+    other-asis	-  imported as-is, immediate release
+    matrix-only	-  CD holds a Psi-Blast PSSM only,
+         does not contain alignment data
+    update-running	-  has been flagged for
+         update (in queue)
+    auto-updated	-  update finished, no
+         work necessary
+    claimed	-  is earmarked for curation
+    curated-complete	-  public curated member of a
+         completed family
+    other	-  for CD production?
+-->
+<!ATTLIST Cdd-descr_status value (
+        unassigned |
+        finished-ok |
+        pending-release |
+        other-asis |
+        matrix-only |
+        update-running |
+        auto-updated |
+        claimed |
+        curated-complete |
+        other
+        ) #IMPLIED >
+
+
+<!-- Date of last version change -->
+<!ELEMENT Cdd-descr_update-date (Date)>
+
+<!--
+ for storing curation notes
+ those won't make it into public
+ distributions
+-->
+<!ELEMENT Cdd-descr_scrapbook (Cdd-descr_scrapbook_E*)>
+
+
+<!ELEMENT Cdd-descr_scrapbook_E (#PCDATA)>
+
+<!-- for linking back to source db -->
+<!ELEMENT Cdd-descr_source-id (Cdd-id-set)>
+
+<!-- to record repeat counts -->
+<!ELEMENT Cdd-descr_repeats (Cdd-repeat)>
+
+<!-- to record short-term history -->
+<!ELEMENT Cdd-descr_old-root (Cdd-id-set)>
+
+<!ELEMENT Cdd-descr_curation-status (%INTEGER;)>
+
+<!--
+    unassigned	-  to record curation status
+    prein	-  when CD is checked out from
+    ofc	-  the tracking database, for 
+    iac	-  use within curation software
+-->
+<!ATTLIST Cdd-descr_curation-status value (
+        unassigned |
+        prein |
+        ofc |
+        iac |
+        ofv1 |
+        iav1 |
+        ofv2 |
+        iav2 |
+        postin |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Cdd-descr_readonly-status (%INTEGER;)>
+
+<!--
+    unassigned	-  to record read-only status
+    readonly	-  when CD is checked out from
+    readwrite	-  the tracking database, for
+    other	-  use within curation software
+-->
+<!ATTLIST Cdd-descr_readonly-status value (
+        unassigned |
+        readonly |
+        readwrite |
+        other
+        ) #IMPLIED >
+
+
+<!-- links to Entrez/books -->
+<!ELEMENT Cdd-descr_book-ref (Cdd-book-ref)>
+
+<!-- add citations and/or author names -->
+<!ELEMENT Cdd-descr_attribution (Pub)>
+
+<!-- hold short descriptive text -->
+<!ELEMENT Cdd-descr_title (#PCDATA)>
+
+
+<!ELEMENT Cdd-descr-set (Cdd-descr*)>
+
+<!--
+ the Cdd-tree stores the hierarchy of CDDs. These objects are stored separate
+ from the CDs to allow for fast retrieval and use as an 'index' into CDs
+ all the components in a CD-tree match components in the full-sized CD
+ and should be synchronized
+-->
+<!ELEMENT Cdd-tree (
+        Cdd-tree_name, 
+        Cdd-tree_id, 
+        Cdd-tree_description?, 
+        Cdd-tree_parent?, 
+        Cdd-tree_children?, 
+        Cdd-tree_siblings?, 
+        Cdd-tree_neighbors?)>
+
+<!-- short name  copied from CD -->
+<!ELEMENT Cdd-tree_name (#PCDATA)>
+
+<!-- IDs         copied from CD -->
+<!ELEMENT Cdd-tree_id (Cdd-id-set)>
+
+<!-- description copied from CD -->
+<!ELEMENT Cdd-tree_description (Cdd-descr-set)>
+
+<!-- CD is the result of a split/merge -->
+<!ELEMENT Cdd-tree_parent (Cdd-id)>
+
+<!-- this CD has been split -->
+<!ELEMENT Cdd-tree_children (Cdd-id-set)>
+
+<!-- related CDs (have common hits) -->
+<!ELEMENT Cdd-tree_siblings (Cdd-id-set)>
+
+<!--
+ co-occurring CDs (non-overlapping 
+ hits to same sequences)
+-->
+<!ELEMENT Cdd-tree_neighbors (Cdd-id-set)>
+
+
+<!ELEMENT Cdd-tree-set (Cdd-tree*)>
+
+<!--
+ Matrix definitions, these are supposed to store PSSMs and corresponding 
+ matrices of relative residue frequencies.
+ the number of columns and rows is listed explicitly, values in columns
+ are stored column by column, i.e. in groups of nrows values for each column
+-->
+<!ELEMENT Matrix (
+        Matrix_ncolumns, 
+        Matrix_nrows, 
+        Matrix_row-labels?, 
+        Matrix_scale-factor, 
+        Matrix_columns)>
+
+<!ELEMENT Matrix_ncolumns (%INTEGER;)>
+
+<!ELEMENT Matrix_nrows (%INTEGER;)>
+
+<!ELEMENT Matrix_row-labels (Matrix_row-labels_E*)>
+
+
+<!ELEMENT Matrix_row-labels_E (#PCDATA)>
+
+<!ELEMENT Matrix_scale-factor (%INTEGER;)>
+
+<!ELEMENT Matrix_columns (Matrix_columns_E*)>
+
+
+<!ELEMENT Matrix_columns_E (%INTEGER;)>
+
+<!--
+ definition for matrix of pairwise "distances", stored as the upper 
+ triangle of a squared n x n matrix (excluding the diagonal), this is
+ supposed to store pairwise percentages of identical residues, pairwise
+ alignment scores or E-values from pairwise BLAST sequence comparisons
+-->
+<!ELEMENT Triangle (
+        Triangle_nelements, 
+        Triangle_scores?, 
+        Triangle_div-ranks?)>
+
+<!ELEMENT Triangle_nelements (%INTEGER;)>
+
+<!ELEMENT Triangle_scores (Score-set)>
+
+<!ELEMENT Triangle_div-ranks (Triangle_div-ranks_E*)>
+
+
+<!ELEMENT Triangle_div-ranks_E (%INTEGER;)>
+
+<!--
+ Update-align is supposed to contain alignments that still need some work
+ done to fit into the CD-proper alignment. These originate from the
+ CD update process (generated by Blast, for example) or may be created in
+ an editing session to save its state
+-->
+<!ELEMENT Update-comment (
+        Update-comment_comment | 
+        Update-comment_addthis | 
+        Update-comment_replaces | 
+        Update-comment_reject-loc | 
+        Update-comment_reference)>
+
+<!--
+ free text to describe nature of
+ Update-align
+-->
+<!ELEMENT Update-comment_comment (#PCDATA)>
+
+<!--
+ suggestion for inclusion in the CD
+ without corresponding alignment
+-->
+<!ELEMENT Update-comment_addthis (Seq-loc)>
+
+<!--
+ if one or several alignment rows are
+ to be replaced by the Update-align
+-->
+<!ELEMENT Update-comment_replaces (Seq-loc)>
+
+<!--
+ if used with Reject-id, specify a
+ location on a sequence which should
+ not be used
+-->
+<!ELEMENT Update-comment_reject-loc (Seq-loc)>
+
+<!--
+ if update alignment imported from
+ citation and for whenever it seems
+ necessary to cite
+-->
+<!ELEMENT Update-comment_reference (Pub)>
+
+<!--
+ Both fields are optional, as the Update-align may be a Seq-annot without
+ description, or a suggestion to add a sequence without the corresponding
+ alignment
+-->
+<!ELEMENT Update-align (
+        Update-align_description?, 
+        Update-align_seqannot?, 
+        Update-align_type)>
+
+<!ELEMENT Update-align_description (Update-comment*)>
+
+<!-- contains the SeqAlign -->
+<!ELEMENT Update-align_seqannot (Seq-annot)>
+
+<!ELEMENT Update-align_type (%INTEGER;)>
+<!ATTLIST Update-align_type value (
+        unassigned |
+        update |
+        update-3d |
+        demoted |
+        demoted-3d |
+        other
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Reject-id (
+        Reject-id_description?, 
+        Reject-id_ids)>
+
+<!ELEMENT Reject-id_description (Update-comment*)>
+
+<!ELEMENT Reject-id_ids (Seq-id*)>
+
+
+<!ELEMENT Feature-evidence (
+        Feature-evidence_comment | 
+        Feature-evidence_reference | 
+        Feature-evidence_bsannot | 
+        Feature-evidence_seqfeat | 
+        Feature-evidence_book-ref)>
+
+<!--
+ so we can spell out what doesn't
+ fit in any other category
+-->
+<!ELEMENT Feature-evidence_comment (#PCDATA)>
+
+<!-- evidence via a literature reference -->
+<!ELEMENT Feature-evidence_reference (Pub)>
+
+<!--
+ evidence via Biostruc-features, such
+ as structure superpositions 
+-->
+<!ELEMENT Feature-evidence_bsannot (Biostruc-annot-set)>
+
+<!--
+ evidence is a Sequence feature found
+ elsewhere
+-->
+<!ELEMENT Feature-evidence_seqfeat (Seq-feat)>
+
+<!-- evidence is a book chapter or figure -->
+<!ELEMENT Feature-evidence_book-ref (Cdd-book-ref)>
+
+
+<!ELEMENT Align-annot (
+        Align-annot_location, 
+        Align-annot_description?, 
+        Align-annot_evidence?, 
+        Align-annot_type?, 
+        Align-annot_aliases?, 
+        Align-annot_motif?, 
+        Align-annot_motifuse?)>
+
+<!--
+ points to a location in one of the
+ aligned sequences, usually the
+ master/representative
+-->
+<!ELEMENT Align-annot_location (Seq-loc)>
+
+<!--
+ to hold descriptions/names like
+ "Heme binding site" or "catalytic
+ triad" etc., something that should
+ be used for labels in visualization
+-->
+<!ELEMENT Align-annot_description (#PCDATA)>
+
+<!--
+ evidence we can
+ compute with
+-->
+<!ELEMENT Align-annot_evidence (Feature-evidence*)>
+
+<!--
+ for typing annotated features
+ 0 .. no type assigned
+ 1 .. active site
+ 2 .. polypeptide binding site
+ 3 .. nucleic acid binding site
+ 4 .. ion binding site
+ 5 .. chemical binding site
+ 6 .. posttranslational modification site
+-->
+<!ELEMENT Align-annot_type (%INTEGER;)>
+
+<!-- adding more names for indexing -->
+<!ELEMENT Align-annot_aliases (Align-annot_aliases_E*)>
+
+
+<!ELEMENT Align-annot_aliases_E (#PCDATA)>
+
+<!-- to validate mapping of sites -->
+<!ELEMENT Align-annot_motif (#PCDATA)>
+
+<!--
+ 0 for validation,
+ 1 for motif somewhere in seqloc
+ 2 for multiple motifs in seqloc
+-->
+<!ELEMENT Align-annot_motifuse (%INTEGER;)>
+
+
+<!ELEMENT Align-annot-set (Align-annot*)>
+
+<!--
+ the Domain-parent records an evolutionary relationship which may not be
+ as simple as a classical parent-child relationship in a typical hierarchy,
+ i.e. where a CD is merely a specific subgroup ("child") of a more general
+ diverse alignment model ("parent"). A CD alignment model may be the result
+ of an ancient fusion event, combining two or more domains into a bigger unit
+ which has subsequently undergone a divergent evolutionary process similar to
+ what may have happened to a single "domain". A CD alignment model may 
+ also reflect the result of a deletion event, where a specific subgroup
+ lacks part of a (set of) domain(s), but where the part present is found to
+ be highly similar to a putative "parent", with some added evidence for
+ an actual deletion, like from the distribution of truncated copies in phylogenetic
+ lineages. Deletion events which affect different parts of a set of
+ duplicated domain architectures may be indistinguishable from actual
+ fission events, which means that we may want to represent the latter as
+ deletions after duplication and do not need a special case for fissions.
+-->
+<!ELEMENT Domain-parent (
+        Domain-parent_parent-type, 
+        Domain-parent_parentid, 
+        Domain-parent_seqannot?)>
+
+<!ELEMENT Domain-parent_parent-type (%INTEGER;)>
+
+<!--
+    classical	-  the classification of parent child relations
+-->
+<!ATTLIST Domain-parent_parent-type value (
+        classical |
+        fusion |
+        deletion |
+        permutation |
+        other
+        ) #IMPLIED >
+
+
+<!-- identify the section parent by accession -->
+<!ELEMENT Domain-parent_parentid (Cdd-id)>
+
+<!--
+ contains the sequence alignment linking
+ CD alignment models, should align the 
+ masters/representatives of each CD
+-->
+<!ELEMENT Domain-parent_seqannot (Seq-annot)>
+
+<!-- record sequence trees generated by a suitable algorithm. -->
+<!ELEMENT Sequence-tree (
+        Sequence-tree_cdAccession?, 
+        Sequence-tree_algorithm, 
+        Sequence-tree_isAnnotated?, 
+        Sequence-tree_root)>
+
+<!ELEMENT Sequence-tree_cdAccession (#PCDATA)>
+
+<!ELEMENT Sequence-tree_algorithm (Algorithm-type)>
+
+<!ELEMENT Sequence-tree_isAnnotated EMPTY>
+<!ATTLIST Sequence-tree_isAnnotated value ( true | false ) "false" >
+
+
+<!ELEMENT Sequence-tree_root (SeqTree-node)>
+
+
+<!ELEMENT SeqTree-node (
+        SeqTree-node_isAnnotated?, 
+        SeqTree-node_name?, 
+        SeqTree-node_distance?, 
+        SeqTree-node_children, 
+        SeqTree-node_annotation?)>
+
+<!ELEMENT SeqTree-node_isAnnotated EMPTY>
+<!ATTLIST SeqTree-node_isAnnotated value ( true | false ) "false" >
+
+
+<!ELEMENT SeqTree-node_name (#PCDATA)>
+
+<!ELEMENT SeqTree-node_distance (%REAL;)>
+
+<!ELEMENT SeqTree-node_children (
+        SeqTree-node_children_children | 
+        SeqTree-node_children_footprint)>
+
+<!ELEMENT SeqTree-node_children_children (SeqTree-node*)>
+
+<!ELEMENT SeqTree-node_children_footprint (
+        SeqTree-node_children_footprint_seqRange, 
+        SeqTree-node_children_footprint_rowId?)>
+
+<!ELEMENT SeqTree-node_children_footprint_seqRange (Seq-interval)>
+
+<!ELEMENT SeqTree-node_children_footprint_rowId (%INTEGER;)>
+
+<!ELEMENT SeqTree-node_annotation (Node-annotation)>
+
+
+<!ELEMENT Algorithm-type (
+        Algorithm-type_scoring-Scheme, 
+        Algorithm-type_clustering-Method, 
+        Algorithm-type_score-Matrix?, 
+        Algorithm-type_gapOpen?, 
+        Algorithm-type_gapExtend?, 
+        Algorithm-type_gapScaleFactor?, 
+        Algorithm-type_nTerminalExt?, 
+        Algorithm-type_cTerminalExt?, 
+        Algorithm-type_tree-scope?, 
+        Algorithm-type_coloring-scope?)>
+
+<!ELEMENT Algorithm-type_scoring-Scheme (%INTEGER;)>
+<!ATTLIST Algorithm-type_scoring-Scheme value (
+        unassigned |
+        percent-id |
+        kimura-corrected |
+        aligned-score |
+        aligned-score-ext |
+        aligned-score-filled |
+        blast-footprint |
+        blast-full |
+        hybrid-aligned-score |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Algorithm-type_clustering-Method (%INTEGER;)>
+<!ATTLIST Algorithm-type_clustering-Method value (
+        unassigned |
+        single-linkage |
+        neighbor-joining |
+        fast-minimum-evolution |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Algorithm-type_score-Matrix (%INTEGER;)>
+<!ATTLIST Algorithm-type_score-Matrix value (
+        unassigned |
+        blosum45 |
+        blosum62 |
+        blosum80 |
+        pam30 |
+        pam70 |
+        pam250 |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Algorithm-type_gapOpen (%INTEGER;)>
+
+<!ELEMENT Algorithm-type_gapExtend (%INTEGER;)>
+
+<!ELEMENT Algorithm-type_gapScaleFactor (%INTEGER;)>
+
+<!ELEMENT Algorithm-type_nTerminalExt (%INTEGER;)>
+
+<!ELEMENT Algorithm-type_cTerminalExt (%INTEGER;)>
+
+<!ELEMENT Algorithm-type_tree-scope (%INTEGER;)>
+<!ATTLIST Algorithm-type_tree-scope value (
+        allDescendants |
+        immediateChildrenOnly |
+        selfOnly |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Algorithm-type_coloring-scope (%INTEGER;)>
+<!ATTLIST Algorithm-type_coloring-scope value (
+        allDescendants |
+        immediateChildrenOnly |
+        other
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Node-annotation (
+        Node-annotation_presentInChildCD?, 
+        Node-annotation_note?)>
+
+<!ELEMENT Node-annotation_presentInChildCD (#PCDATA)>
+
+<!ELEMENT Node-annotation_note (#PCDATA)>
+
+<!--
+ the Cdd is the basic ASN.1 object storing an annotated and curated set of
+ alignments (formulated as a set of pairwise master-slave alignments). 
+ The alignment data are contained in Seq-annots, and a special type of
+ object, the Update-align, contains additional alignment data from unfinished
+ editing sessions and update processes. The Biostruc-annot-set holds 
+ structure superposition information for multiple structure-derived rows in
+ the alignment.
+ Version numbers in Global-ids are meant to be updated every time the Cdd is
+ changed in a way that does not require Global-ids to be changed (sequences
+ added in update cycle, annotation changed, alignment errors fixed)
+-->
+<!ELEMENT Cdd (
+        Cdd_name, 
+        Cdd_id, 
+        Cdd_description?, 
+        Cdd_seqannot?, 
+        Cdd_features?, 
+        Cdd_sequences?, 
+        Cdd_profile-range?, 
+        Cdd_trunc-master?, 
+        Cdd_posfreq?, 
+        Cdd_scoremat?, 
+        Cdd_distance?, 
+        Cdd_parent?, 
+        Cdd_children?, 
+        Cdd_siblings?, 
+        Cdd_neighbors?, 
+        Cdd_pending?, 
+        Cdd_rejects?, 
+        Cdd_master3d?, 
+        Cdd_alignannot?, 
+        Cdd_style-dictionary?, 
+        Cdd_user-annotations?, 
+        Cdd_ancestors?, 
+        Cdd_scoreparams?, 
+        Cdd_seqtree?)>
+
+<!-- a short name (can be the accession..) -->
+<!ELEMENT Cdd_name (#PCDATA)>
+
+<!-- this CD's Ids -->
+<!ELEMENT Cdd_id (Cdd-id-set)>
+
+<!-- status, references, etc. -->
+<!ELEMENT Cdd_description (Cdd-descr-set)>
+
+<!-- contains the CD alignment -->
+<!ELEMENT Cdd_seqannot (Seq-annot*)>
+
+<!--
+ contains structure
+ alignment data
+ or "core" definitions
+-->
+<!ELEMENT Cdd_features (Biostruc-annot-set)>
+
+<!-- store as bioseq-set inside seq-entry -->
+<!ELEMENT Cdd_sequences (Seq-entry)>
+
+<!--
+ profile for this region only
+ also stores the Seq-id of the master
+-->
+<!ELEMENT Cdd_profile-range (Seq-interval)>
+
+<!--
+ holds the truncated master, which
+ may be something like a consensus,
+ uses the same sequence coordinate
+ frame as the profile-range
+-->
+<!ELEMENT Cdd_trunc-master (Bioseq)>
+
+<!-- relative residue frequencies -->
+<!ELEMENT Cdd_posfreq (Matrix)>
+
+<!-- Position dependent score matrix -->
+<!ELEMENT Cdd_scoremat (Matrix)>
+
+<!-- pairwise distances for all seqs. -->
+<!ELEMENT Cdd_distance (Triangle)>
+
+<!-- this CD is the result of a split -->
+<!ELEMENT Cdd_parent (Cdd-id)>
+
+<!-- this CD has been split, not used -->
+<!ELEMENT Cdd_children (Cdd-id-set)>
+
+<!-- related CDs (common hits), clusters -->
+<!ELEMENT Cdd_siblings (Cdd-id-set)>
+
+<!-- co-occurring CDs, not used -->
+<!ELEMENT Cdd_neighbors (Cdd-id-set)>
+
+<!--
+ contains alignments from
+ update or "lower panel"
+-->
+<!ELEMENT Cdd_pending (Update-align*)>
+
+<!--
+ SeqIds of rejected CD-
+ members, ignore in update
+-->
+<!ELEMENT Cdd_rejects (Reject-id*)>
+
+<!-- record if CD has a 3D representative -->
+<!ELEMENT Cdd_master3d (Seq-id*)>
+
+<!-- alignment annotation -->
+<!ELEMENT Cdd_alignannot (Align-annot-set)>
+
+<!-- record rendering styles -->
+<!ELEMENT Cdd_style-dictionary (Cn3d-style-dictionary)>
+
+<!-- user annotations in Cn3D -->
+<!ELEMENT Cdd_user-annotations (Cn3d-user-annotations)>
+
+<!-- list of parents -->
+<!ELEMENT Cdd_ancestors (Domain-parent*)>
+
+<!ELEMENT Cdd_scoreparams (PssmWithParameters)>
+<!-- record sequence trees generated by a suitable algorithm. -->
+<!ELEMENT Cdd_seqtree (Sequence-tree)>
+
+
+<!ELEMENT Cdd-set (Cdd*)>
+
+<!--
+ Cdd projects store a set of CDs, typically related to each other
+ relationships would be specified using the ancestors fields in the
+ individual CD objects. For use with CD-Tree, a program to visualize
+ curated CD hierarchies and evidence for hierarchical family structures.
+-->
+<!ELEMENT Cdd-Viewer-Rect (
+        Cdd-Viewer-Rect_top, 
+        Cdd-Viewer-Rect_left, 
+        Cdd-Viewer-Rect_width, 
+        Cdd-Viewer-Rect_height)>
+
+<!-- top coordinate -->
+<!ELEMENT Cdd-Viewer-Rect_top (%INTEGER;)>
+
+<!-- left  coordinate -->
+<!ELEMENT Cdd-Viewer-Rect_left (%INTEGER;)>
+
+<!-- width  -->
+<!ELEMENT Cdd-Viewer-Rect_width (%INTEGER;)>
+
+<!-- height -->
+<!ELEMENT Cdd-Viewer-Rect_height (%INTEGER;)>
+
+
+<!ELEMENT Cdd-Viewer (
+        Cdd-Viewer_ctrl, 
+        Cdd-Viewer_rect?, 
+        Cdd-Viewer_accessions)>
+<!-- viewer type -->
+<!ELEMENT Cdd-Viewer_ctrl (%INTEGER;)>
+<!ATTLIST Cdd-Viewer_ctrl value (
+        unassigned |
+        cd-info |
+        align-annot |
+        seq-list |
+        seq-tree |
+        merge-preview |
+        cross-hits |
+        notes |
+        tax-tree |
+        dart |
+        dart-selected-rows |
+        other
+        ) #IMPLIED >
+
+
+<!-- viewer rectangle -->
+<!ELEMENT Cdd-Viewer_rect (Cdd-Viewer-Rect)>
+
+<!-- list of accessions associated with a viewer -->
+<!ELEMENT Cdd-Viewer_accessions (Cdd-Viewer_accessions_E*)>
+
+
+<!ELEMENT Cdd-Viewer_accessions_E (#PCDATA)>
+
+
+<!ELEMENT Cdd-Script (
+        Cdd-Script_type?, 
+        Cdd-Script_name?, 
+        Cdd-Script_commands)>
+
+<!ELEMENT Cdd-Script_type (%INTEGER;)>
+<!ATTLIST Cdd-Script_type value (
+        unassigned |
+        user-recorded |
+        server-generated |
+        other
+        ) #IMPLIED >
+
+
+<!-- user assigned name/description -->
+<!ELEMENT Cdd-Script_name (#PCDATA)>
+
+<!-- actual script commands -->
+<!ELEMENT Cdd-Script_commands (#PCDATA)>
+
+<!-- cd colors are as:  0000FF for red, 00FF00 for green, FF0000 for blue -->
+<!ELEMENT Cdd-Project (
+        Cdd-Project_cds, 
+        Cdd-Project_cdcolor, 
+        Cdd-Project_viewers, 
+        Cdd-Project_log, 
+        Cdd-Project_scripts?, 
+        Cdd-Project_id?, 
+        Cdd-Project_rids?, 
+        Cdd-Project_create-date?, 
+        Cdd-Project_update-date?, 
+        Cdd-Project_project-id?)>
+
+<!-- cds -->
+<!ELEMENT Cdd-Project_cds (Cdd*)>
+
+<!-- colors   -->
+<!ELEMENT Cdd-Project_cdcolor (Cdd-Project_cdcolor_E*)>
+
+
+<!ELEMENT Cdd-Project_cdcolor_E (%INTEGER;)>
+
+<!-- Sequence viewers -->
+<!ELEMENT Cdd-Project_viewers (Cdd-Viewer*)>
+
+<!-- log -->
+<!ELEMENT Cdd-Project_log (#PCDATA)>
+
+<!-- command scripts -->
+<!ELEMENT Cdd-Project_scripts (Cdd-Script*)>
+
+<!-- to assign unique project id -->
+<!ELEMENT Cdd-Project_id (Cdd-id-set)>
+
+<!-- to store request IDs for batch CD-Searches -->
+<!ELEMENT Cdd-Project_rids (Cdd-Project_rids_E*)>
+
+
+<!ELEMENT Cdd-Project_rids_E (#PCDATA)>
+
+<!ELEMENT Cdd-Project_create-date (Date)>
+
+<!ELEMENT Cdd-Project_update-date (Date)>
+
+<!-- for temporary tracking in the database -->
+<!ELEMENT Cdd-Project_project-id (%INTEGER;)>
+
diff --git a/dtd/NCBI_Cn3d.dtd b/dtd/NCBI_Cn3d.dtd
new file mode 100644
index 0000000..9558045
--- /dev/null
+++ b/dtd/NCBI_Cn3d.dtd
@@ -0,0 +1,101 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "cn3d.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Cn3d.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Cn3d_module PUBLIC "-//NCBI//NCBI Cn3d Module//EN" "NCBI_Cn3d.mod.dtd">
+%NCBI_Cn3d_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Cn3d.mod.dtd b/dtd/NCBI_Cn3d.mod.dtd
new file mode 100644
index 0000000..16a815f
--- /dev/null
+++ b/dtd/NCBI_Cn3d.mod.dtd
@@ -0,0 +1,534 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "cn3d.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Cn3d"
+================================================= -->
+
+<!--
+$Revision: 1.15 $
+**********************************************************************
+
+  Definitions for Cn3D-specific data (rendering settings,
+    user annotations, etc.)
+
+  by Paul Thiessen
+
+  National Center for Biotechnology Information
+  National Institutes of Health
+  Bethesda, MD 20894 USA
+
+ asntool -m cn3d.asn -w 100 -o cn3d.h
+ asntool -B objcn3d -m cn3d.asn -G -w 100 -K cn3d.h -I mapcn3d.h \
+   -M ../mmdb1.asn,../mmdb2.asn,../mmdb3.asn
+**********************************************************************
+ Cn3D-specific information
+-->
+
+<!-- Elements used by other modules:
+          Cn3d-style-dictionary,
+          Cn3d-user-annotations -->
+
+<!-- Elements referenced from other modules:
+          Biostruc-id FROM MMDB,
+          Molecule-id,
+          Residue-id FROM MMDB-Chemical-graph -->
+<!-- ============================================ -->
+
+<!--
+ values of enumerations must match those in cn3d/style_manager.hpp!
+ for different types of backbones
+-->
+<!ELEMENT Cn3d-backbone-type %ENUM;>
+<!ATTLIST Cn3d-backbone-type value (
+        off |
+        trace |
+        partial |
+        complete
+        ) #REQUIRED >
+
+
+<!--
+ atom/bond/object rendering styles
+ for atoms and bonds
+-->
+<!ELEMENT Cn3d-drawing-style %ENUM;>
+
+<!--
+    with-arrows	-  for 3d-objects
+-->
+<!ATTLIST Cn3d-drawing-style value (
+        wire |
+        tubes |
+        ball-and-stick |
+        space-fill |
+        wire-worm |
+        tube-worm |
+        with-arrows |
+        without-arrows
+        ) #REQUIRED >
+
+
+<!--
+ available color schemes (not all
+ necessarily applicable to all objects)
+-->
+<!ELEMENT Cn3d-color-scheme %ENUM;>
+
+<!--
+    aligned	-  different alignment conservation coloring (currently only for proteins)
+    temperature	-  other schemes
+-->
+<!ATTLIST Cn3d-color-scheme value (
+        element |
+        object |
+        molecule |
+        domain |
+        residue |
+        secondary-structure |
+        user-select |
+        aligned |
+        identity |
+        variety |
+        weighted-variety |
+        information-content |
+        fit |
+        block-fit |
+        block-z-fit |
+        block-row-fit |
+        temperature |
+        hydrophobicity |
+        charge |
+        rainbow
+        ) #REQUIRED >
+
+
+<!--
+ RGB triplet, interpreted (after division by the scale-factor) as floating
+ point values which should range from [0..1]. The default scale-factor is
+ 255, so that one can conveniently set integer byte values [0..255] for
+ colors with the scale-factor already set appropriately to map to [0..1].
+    An alpha value is allowed, but is currently ignored by Cn3D.
+-->
+<!ELEMENT Cn3d-color (
+        Cn3d-color_scale-factor?, 
+        Cn3d-color_red, 
+        Cn3d-color_green, 
+        Cn3d-color_blue, 
+        Cn3d-color_alpha?)>
+
+<!ELEMENT Cn3d-color_scale-factor (%INTEGER;)>
+
+<!ELEMENT Cn3d-color_red (%INTEGER;)>
+
+<!ELEMENT Cn3d-color_green (%INTEGER;)>
+
+<!ELEMENT Cn3d-color_blue (%INTEGER;)>
+
+<!ELEMENT Cn3d-color_alpha (%INTEGER;)>
+
+<!-- style blob for backbones only -->
+<!ELEMENT Cn3d-backbone-style (
+        Cn3d-backbone-style_type, 
+        Cn3d-backbone-style_style, 
+        Cn3d-backbone-style_color-scheme, 
+        Cn3d-backbone-style_user-color)>
+<!--
+ values of enumerations must match those in cn3d/style_manager.hpp!
+ for different types of backbones
+-->
+<!ELEMENT Cn3d-backbone-style_type (Cn3d-backbone-type)>
+<!--
+ atom/bond/object rendering styles
+ for atoms and bonds
+-->
+<!ELEMENT Cn3d-backbone-style_style (Cn3d-drawing-style)>
+<!--
+ available color schemes (not all
+ necessarily applicable to all objects)
+-->
+<!ELEMENT Cn3d-backbone-style_color-scheme (Cn3d-color-scheme)>
+<!--
+ RGB triplet, interpreted (after division by the scale-factor) as floating
+ point values which should range from [0..1]. The default scale-factor is
+ 255, so that one can conveniently set integer byte values [0..255] for
+ colors with the scale-factor already set appropriately to map to [0..1].
+    An alpha value is allowed, but is currently ignored by Cn3D.
+-->
+<!ELEMENT Cn3d-backbone-style_user-color (Cn3d-color)>
+
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-general-style (
+        Cn3d-general-style_is-on, 
+        Cn3d-general-style_style, 
+        Cn3d-general-style_color-scheme, 
+        Cn3d-general-style_user-color)>
+
+<!ELEMENT Cn3d-general-style_is-on EMPTY>
+<!ATTLIST Cn3d-general-style_is-on value ( true | false ) #REQUIRED >
+
+<!--
+ atom/bond/object rendering styles
+ for atoms and bonds
+-->
+<!ELEMENT Cn3d-general-style_style (Cn3d-drawing-style)>
+<!--
+ available color schemes (not all
+ necessarily applicable to all objects)
+-->
+<!ELEMENT Cn3d-general-style_color-scheme (Cn3d-color-scheme)>
+<!--
+ RGB triplet, interpreted (after division by the scale-factor) as floating
+ point values which should range from [0..1]. The default scale-factor is
+ 255, so that one can conveniently set integer byte values [0..255] for
+ colors with the scale-factor already set appropriately to map to [0..1].
+    An alpha value is allowed, but is currently ignored by Cn3D.
+-->
+<!ELEMENT Cn3d-general-style_user-color (Cn3d-color)>
+
+<!-- style blob for backbone labels -->
+<!ELEMENT Cn3d-backbone-label-style (
+        Cn3d-backbone-label-style_spacing, 
+        Cn3d-backbone-label-style_type, 
+        Cn3d-backbone-label-style_number, 
+        Cn3d-backbone-label-style_termini, 
+        Cn3d-backbone-label-style_white)>
+
+<!-- zero means none -->
+<!ELEMENT Cn3d-backbone-label-style_spacing (%INTEGER;)>
+
+<!ELEMENT Cn3d-backbone-label-style_type %ENUM;>
+<!ATTLIST Cn3d-backbone-label-style_type value (
+        one-letter |
+        three-letter
+        ) #REQUIRED >
+
+
+<!ELEMENT Cn3d-backbone-label-style_number %ENUM;>
+
+<!--
+    sequential	-  from 1, by residues present, to match sequence
+    pdb	-  use number assigned by PDB
+-->
+<!ATTLIST Cn3d-backbone-label-style_number value (
+        none |
+        sequential |
+        pdb
+        ) #REQUIRED >
+
+
+<!ELEMENT Cn3d-backbone-label-style_termini EMPTY>
+<!ATTLIST Cn3d-backbone-label-style_termini value ( true | false ) #REQUIRED >
+
+
+<!-- all white, or (if false) color of alpha carbon -->
+<!ELEMENT Cn3d-backbone-label-style_white EMPTY>
+<!ATTLIST Cn3d-backbone-label-style_white value ( true | false ) #REQUIRED >
+
+
+<!-- rendering settings for Cn3D (mirrors StyleSettings class) -->
+<!ELEMENT Cn3d-style-settings (
+        Cn3d-style-settings_name?, 
+        Cn3d-style-settings_protein-backbone, 
+        Cn3d-style-settings_nucleotide-backbone, 
+        Cn3d-style-settings_protein-sidechains, 
+        Cn3d-style-settings_nucleotide-sidechains, 
+        Cn3d-style-settings_heterogens, 
+        Cn3d-style-settings_solvents, 
+        Cn3d-style-settings_connections, 
+        Cn3d-style-settings_helix-objects, 
+        Cn3d-style-settings_strand-objects, 
+        Cn3d-style-settings_virtual-disulfides-on, 
+        Cn3d-style-settings_virtual-disulfide-color, 
+        Cn3d-style-settings_hydrogens-on, 
+        Cn3d-style-settings_background-color, 
+        Cn3d-style-settings_scale-factor, 
+        Cn3d-style-settings_space-fill-proportion, 
+        Cn3d-style-settings_ball-radius, 
+        Cn3d-style-settings_stick-radius, 
+        Cn3d-style-settings_tube-radius, 
+        Cn3d-style-settings_tube-worm-radius, 
+        Cn3d-style-settings_helix-radius, 
+        Cn3d-style-settings_strand-width, 
+        Cn3d-style-settings_strand-thickness, 
+        Cn3d-style-settings_protein-labels?, 
+        Cn3d-style-settings_nucleotide-labels?, 
+        Cn3d-style-settings_ion-labels?)>
+
+<!-- a name (for favorites) -->
+<!ELEMENT Cn3d-style-settings_name (#PCDATA)>
+
+<!-- backbone styles -->
+<!ELEMENT Cn3d-style-settings_protein-backbone (Cn3d-backbone-style)>
+<!-- style blob for backbones only -->
+<!ELEMENT Cn3d-style-settings_nucleotide-backbone (Cn3d-backbone-style)>
+
+<!-- styles for other stuff -->
+<!ELEMENT Cn3d-style-settings_protein-sidechains (Cn3d-general-style)>
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-style-settings_nucleotide-sidechains (Cn3d-general-style)>
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-style-settings_heterogens (Cn3d-general-style)>
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-style-settings_solvents (Cn3d-general-style)>
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-style-settings_connections (Cn3d-general-style)>
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-style-settings_helix-objects (Cn3d-general-style)>
+<!-- style blob for other objects -->
+<!ELEMENT Cn3d-style-settings_strand-objects (Cn3d-general-style)>
+
+<!-- virtual disulfides -->
+<!ELEMENT Cn3d-style-settings_virtual-disulfides-on EMPTY>
+<!ATTLIST Cn3d-style-settings_virtual-disulfides-on value ( true | false ) #REQUIRED >
+
+<!--
+ RGB triplet, interpreted (after division by the scale-factor) as floating
+ point values which should range from [0..1]. The default scale-factor is
+ 255, so that one can conveniently set integer byte values [0..255] for
+ colors with the scale-factor already set appropriately to map to [0..1].
+    An alpha value is allowed, but is currently ignored by Cn3D.
+-->
+<!ELEMENT Cn3d-style-settings_virtual-disulfide-color (Cn3d-color)>
+
+<!-- hydrogens -->
+<!ELEMENT Cn3d-style-settings_hydrogens-on EMPTY>
+<!ATTLIST Cn3d-style-settings_hydrogens-on value ( true | false ) #REQUIRED >
+
+
+<!--
+ background
+ floating point parameters - scale-factor applies to all the following:
+-->
+<!ELEMENT Cn3d-style-settings_background-color (Cn3d-color)>
+
+<!ELEMENT Cn3d-style-settings_scale-factor (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_space-fill-proportion (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_ball-radius (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_stick-radius (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_tube-radius (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_tube-worm-radius (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_helix-radius (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_strand-width (%INTEGER;)>
+
+<!ELEMENT Cn3d-style-settings_strand-thickness (%INTEGER;)>
+
+<!-- backbone labels (no labels if not present) -->
+<!ELEMENT Cn3d-style-settings_protein-labels (Cn3d-backbone-label-style)>
+<!-- style blob for backbone labels -->
+<!ELEMENT Cn3d-style-settings_nucleotide-labels (Cn3d-backbone-label-style)>
+
+<!-- ion labels -->
+<!ELEMENT Cn3d-style-settings_ion-labels EMPTY>
+<!ATTLIST Cn3d-style-settings_ion-labels value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT Cn3d-style-settings-set (Cn3d-style-settings*)>
+
+
+<!ELEMENT Cn3d-style-table-id (%INTEGER;)>
+
+
+<!ELEMENT Cn3d-style-table-item (
+        Cn3d-style-table-item_id, 
+        Cn3d-style-table-item_style)>
+
+<!ELEMENT Cn3d-style-table-item_id (Cn3d-style-table-id)>
+<!-- rendering settings for Cn3D (mirrors StyleSettings class) -->
+<!ELEMENT Cn3d-style-table-item_style (Cn3d-style-settings)>
+
+<!-- the global settings, and a lookup table of styles for user annotations. -->
+<!ELEMENT Cn3d-style-dictionary (
+        Cn3d-style-dictionary_global-style, 
+        Cn3d-style-dictionary_style-table?)>
+<!-- rendering settings for Cn3D (mirrors StyleSettings class) -->
+<!ELEMENT Cn3d-style-dictionary_global-style (Cn3d-style-settings)>
+
+<!ELEMENT Cn3d-style-dictionary_style-table (Cn3d-style-table-item*)>
+
+<!--
+ a range of residues in a chain, identified by MMDB residue-id
+ (e.g., numbered from 1)
+-->
+<!ELEMENT Cn3d-residue-range (
+        Cn3d-residue-range_from, 
+        Cn3d-residue-range_to)>
+
+<!ELEMENT Cn3d-residue-range_from (Residue-id)>
+
+<!ELEMENT Cn3d-residue-range_to (Residue-id)>
+
+<!-- set of locations on a particular chain -->
+<!ELEMENT Cn3d-molecule-location (
+        Cn3d-molecule-location_molecule-id, 
+        Cn3d-molecule-location_residues?)>
+
+<!--
+ MMDB molecule id
+ which residues; whole molecule implied if absent
+-->
+<!ELEMENT Cn3d-molecule-location_molecule-id (Molecule-id)>
+
+<!ELEMENT Cn3d-molecule-location_residues (Cn3d-residue-range*)>
+
+<!--
+ set of locations on a particular structure object (e.g., a PDB/MMDB
+ structure), which may include multiple ranges of residues each on
+ multiple chains.
+-->
+<!ELEMENT Cn3d-object-location (
+        Cn3d-object-location_structure-id, 
+        Cn3d-object-location_residues)>
+
+<!ELEMENT Cn3d-object-location_structure-id (Biostruc-id)>
+
+<!ELEMENT Cn3d-object-location_residues (Cn3d-molecule-location*)>
+
+<!-- information for an individual user annotation -->
+<!ELEMENT Cn3d-user-annotation (
+        Cn3d-user-annotation_name, 
+        Cn3d-user-annotation_description?, 
+        Cn3d-user-annotation_style-id, 
+        Cn3d-user-annotation_residues, 
+        Cn3d-user-annotation_is-on)>
+
+<!-- a (short) name for this annotation -->
+<!ELEMENT Cn3d-user-annotation_name (#PCDATA)>
+
+<!-- an optional longer description -->
+<!ELEMENT Cn3d-user-annotation_description (#PCDATA)>
+
+<!-- how to draw this annotation -->
+<!ELEMENT Cn3d-user-annotation_style-id (Cn3d-style-table-id)>
+
+<!-- which residues to cover -->
+<!ELEMENT Cn3d-user-annotation_residues (Cn3d-object-location*)>
+
+<!-- whether this annotation is to be turned on in Cn3D -->
+<!ELEMENT Cn3d-user-annotation_is-on EMPTY>
+<!ATTLIST Cn3d-user-annotation_is-on value ( true | false ) #REQUIRED >
+
+
+<!-- a GL-ordered transformation matrix -->
+<!ELEMENT Cn3d-GL-matrix (
+        Cn3d-GL-matrix_m0, 
+        Cn3d-GL-matrix_m1, 
+        Cn3d-GL-matrix_m2, 
+        Cn3d-GL-matrix_m3, 
+        Cn3d-GL-matrix_m4, 
+        Cn3d-GL-matrix_m5, 
+        Cn3d-GL-matrix_m6, 
+        Cn3d-GL-matrix_m7, 
+        Cn3d-GL-matrix_m8, 
+        Cn3d-GL-matrix_m9, 
+        Cn3d-GL-matrix_m10, 
+        Cn3d-GL-matrix_m11, 
+        Cn3d-GL-matrix_m12, 
+        Cn3d-GL-matrix_m13, 
+        Cn3d-GL-matrix_m14, 
+        Cn3d-GL-matrix_m15)>
+
+<!ELEMENT Cn3d-GL-matrix_m0 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m1 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m2 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m3 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m4 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m5 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m6 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m7 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m8 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m9 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m10 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m11 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m12 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m13 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m14 (%REAL;)>
+
+<!ELEMENT Cn3d-GL-matrix_m15 (%REAL;)>
+
+<!-- a floating point 3d vector -->
+<!ELEMENT Cn3d-vector (
+        Cn3d-vector_x, 
+        Cn3d-vector_y, 
+        Cn3d-vector_z)>
+
+<!ELEMENT Cn3d-vector_x (%REAL;)>
+
+<!ELEMENT Cn3d-vector_y (%REAL;)>
+
+<!ELEMENT Cn3d-vector_z (%REAL;)>
+
+<!-- parameters used to set up the camera in Cn3D -->
+<!ELEMENT Cn3d-view-settings (
+        Cn3d-view-settings_camera-distance, 
+        Cn3d-view-settings_camera-angle-rad, 
+        Cn3d-view-settings_camera-look-at-X, 
+        Cn3d-view-settings_camera-look-at-Y, 
+        Cn3d-view-settings_camera-clip-near, 
+        Cn3d-view-settings_camera-clip-far, 
+        Cn3d-view-settings_matrix, 
+        Cn3d-view-settings_rotation-center)>
+
+<!-- camera on +Z axis this distance from origin -->
+<!ELEMENT Cn3d-view-settings_camera-distance (%REAL;)>
+
+<!-- camera angle -->
+<!ELEMENT Cn3d-view-settings_camera-angle-rad (%REAL;)>
+
+<!-- X,Y of point in Z=0 plane camera points at -->
+<!ELEMENT Cn3d-view-settings_camera-look-at-X (%REAL;)>
+
+<!ELEMENT Cn3d-view-settings_camera-look-at-Y (%REAL;)>
+
+<!-- distance of clipping planes from camera -->
+<!ELEMENT Cn3d-view-settings_camera-clip-near (%REAL;)>
+
+<!ELEMENT Cn3d-view-settings_camera-clip-far (%REAL;)>
+
+<!-- transformation of objects in the scene -->
+<!ELEMENT Cn3d-view-settings_matrix (Cn3d-GL-matrix)>
+
+<!-- center of rotation of whole scene -->
+<!ELEMENT Cn3d-view-settings_rotation-center (Cn3d-vector)>
+
+<!--
+ The list of annotations for a given CDD/mime. If residue regions overlap
+ between annotations that are turned on, the last annotation in this list
+ that contains these residues will be used as the display style for these
+ residues.
+   Also contains the current viewpoint, so that user's camera angle
+ can be stored and reproduced, for illustrations, on-line figures, etc.
+-->
+<!ELEMENT Cn3d-user-annotations (
+        Cn3d-user-annotations_annotations?, 
+        Cn3d-user-annotations_view?)>
+
+<!ELEMENT Cn3d-user-annotations_annotations (Cn3d-user-annotation*)>
+<!-- parameters used to set up the camera in Cn3D -->
+<!ELEMENT Cn3d-user-annotations_view (Cn3d-view-settings)>
+
diff --git a/dtd/NCBI_Entity.mod.dtd b/dtd/NCBI_Entity.mod.dtd
new file mode 100644
index 0000000..3919c3e
--- /dev/null
+++ b/dtd/NCBI_Entity.mod.dtd
@@ -0,0 +1,13 @@
+<!-- ======================== -->
+<!-- NCBI DTD                 -->
+<!-- NCBI ASN.1 mapped to XML -->
+<!-- ======================== -->
+ 
+<!-- Entities used to give specificity to #PCDATA -->
+<!ENTITY % INTEGER '#PCDATA'>
+<!ENTITY % ENUM 'EMPTY'>
+<!ENTITY % BOOLEAN 'EMPTY'>
+<!ENTITY % NULL 'EMPTY'>
+<!ENTITY % REAL '#PCDATA'>
+<!ENTITY % OCTETS '#PCDATA'>
+<!-- ============================================ -->
diff --git a/dtd/NCBI_Entrez2.dtd b/dtd/NCBI_Entrez2.dtd
new file mode 100644
index 0000000..a08a907
--- /dev/null
+++ b/dtd/NCBI_Entrez2.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "entrez2.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Entrez2.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Entrez2_module PUBLIC "-//NCBI//NCBI Entrez2 Module//EN" "NCBI_Entrez2.mod.dtd">
+%NCBI_Entrez2_module;
diff --git a/dtd/NCBI_Entrez2.mod.dtd b/dtd/NCBI_Entrez2.mod.dtd
new file mode 100644
index 0000000..5eb72c9
--- /dev/null
+++ b/dtd/NCBI_Entrez2.mod.dtd
@@ -0,0 +1,747 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "entrez2.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Entrez2"
+================================================= -->
+
+<!--
+$Revision: 1.12 $********************************************
+
+  entrez2.asn
+   Version 1
+
+   API to Entrez Engine (1999)
+   Retrieval of sequence done through ID1 module
+     Also, SeqId queries
+   Retrieval of PubMed records through PubMed module
+   Retrieval of Structures through PubStruct module
+   Retrieval of Genomes through Genomes module
+
+***************************************************************
+-->
+
+<!--
+**************************************
+  Entrez2 common elements
+**************************************
+ a date/time stamp
+-->
+<!ELEMENT Entrez2-dt (%INTEGER;)>
+
+<!-- database name -->
+<!ELEMENT Entrez2-db-id (#PCDATA)>
+
+<!-- field name -->
+<!ELEMENT Entrez2-field-id (#PCDATA)>
+
+<!-- link name -->
+<!ELEMENT Entrez2-link-id (#PCDATA)>
+
+<!-- list of record UIDs -->
+<!ELEMENT Entrez2-id-list (
+        Entrez2-id-list_db, 
+        Entrez2-id-list_num, 
+        Entrez2-id-list_uids?)>
+
+<!-- the database -->
+<!ELEMENT Entrez2-id-list_db (Entrez2-db-id)>
+
+<!-- number of uids -->
+<!ELEMENT Entrez2-id-list_num (%INTEGER;)>
+
+<!-- coded uids -->
+<!ELEMENT Entrez2-id-list_uids (%OCTETS;)>
+
+<!--
+****************************************
+ The structured form of the boolean is the same in a request or
+    return so that it easy to modify a query. This means some
+    fields are only considered in a return value, like counts
+    by term. They are ignored in a request.
+ The structured boolean supports specific boolean components,
+    an unparsed string in query syntax, and UID lists as
+    elements of a boolean. This makes it possible to submit
+    a single string, a fully structured query, or a mixture.
+    The UID list feature means one can also perform refinements
+    on UID lists from links, neighbors, or other operations.
+    UID list query now returns a history key for subsequent use.
+*****************************************
+-->
+<!ELEMENT Entrez2-boolean-exp (
+        Entrez2-boolean-exp_db, 
+        Entrez2-boolean-exp_exp, 
+        Entrez2-boolean-exp_limits?)>
+
+<!-- database for this query -->
+<!ELEMENT Entrez2-boolean-exp_db (Entrez2-db-id)>
+
+<!-- the Boolean -->
+<!ELEMENT Entrez2-boolean-exp_exp (Entrez2-boolean-element*)>
+
+<!-- date bounds -->
+<!ELEMENT Entrez2-boolean-exp_limits (Entrez2-limits)>
+
+
+<!ELEMENT Entrez2-boolean-element (
+        Entrez2-boolean-element_str | 
+        Entrez2-boolean-element_op | 
+        Entrez2-boolean-element_term | 
+        Entrez2-boolean-element_ids | 
+        Entrez2-boolean-element_key)>
+
+<!-- unparsed query string -->
+<!ELEMENT Entrez2-boolean-element_str (#PCDATA)>
+
+<!-- logical operator -->
+<!ELEMENT Entrez2-boolean-element_op (Entrez2-operator)>
+
+<!-- fielded term -->
+<!ELEMENT Entrez2-boolean-element_term (Entrez2-boolean-term)>
+
+<!-- list of UIDs - returns history key in reply -->
+<!ELEMENT Entrez2-boolean-element_ids (Entrez2-id-list)>
+
+<!-- history key for uploaded UID list or other query -->
+<!ELEMENT Entrez2-boolean-element_key (#PCDATA)>
+
+<!--
+*****************************************
+ the term is both sent and received as parts of
+   queries and replies. The attributes can be filled in
+   by either, but may be ignored by one or the other. Flags are
+   shown if a real value is only of use in the query (Q), only
+   in the reply (R), or used in both (B)
+ do-not-explode and do-not-translate are only active set by
+   by the query. However, they retain those settings in the
+   return value so they can be resent with a new query
+******************************************
+-->
+<!ELEMENT Entrez2-boolean-term (
+        Entrez2-boolean-term_field, 
+        Entrez2-boolean-term_term, 
+        Entrez2-boolean-term_term-count?, 
+        Entrez2-boolean-term_do-not-explode?, 
+        Entrez2-boolean-term_do-not-translate?)>
+
+<!-- B -->
+<!ELEMENT Entrez2-boolean-term_field (Entrez2-field-id)>
+
+<!-- B -->
+<!ELEMENT Entrez2-boolean-term_term (#PCDATA)>
+
+<!-- R count of records with term -->
+<!ELEMENT Entrez2-boolean-term_term-count (%INTEGER;)>
+
+<!-- Q do not explode term -->
+<!ELEMENT Entrez2-boolean-term_do-not-explode EMPTY>
+<!ATTLIST Entrez2-boolean-term_do-not-explode value ( true | false ) "false" >
+
+
+<!-- Q do not use synonyms -->
+<!ELEMENT Entrez2-boolean-term_do-not-translate EMPTY>
+<!ATTLIST Entrez2-boolean-term_do-not-translate value ( true | false ) "false" >
+
+
+
+<!ELEMENT Entrez2-operator (%INTEGER;)>
+<!ATTLIST Entrez2-operator value (
+        and |
+        or |
+        butnot |
+        range |
+        left-paren |
+        right-paren
+        ) #IMPLIED >
+
+
+<!--
+***************************************
+  Entrez2 Request types
+***************************************
+****************************************
+ The basic request wrapper leaves space for a version which
+   allow the server to support older clients
+ The tool parameter allows us to log the client types for
+   debugging and tuning
+ The cookie is a session ID returned by the first Entrez2-reply
+****************************************
+ a standard request
+-->
+<!ELEMENT Entrez2-request (
+        Entrez2-request_request, 
+        Entrez2-request_version, 
+        Entrez2-request_tool?, 
+        Entrez2-request_cookie?, 
+        Entrez2-request_use-history?)>
+
+<!-- the actual request -->
+<!ELEMENT Entrez2-request_request (E2Request)>
+
+<!-- ASN1 spec version -->
+<!ELEMENT Entrez2-request_version (%INTEGER;)>
+
+<!-- tool making request -->
+<!ELEMENT Entrez2-request_tool (#PCDATA)>
+
+<!-- history session cookie -->
+<!ELEMENT Entrez2-request_cookie (#PCDATA)>
+
+<!-- request should use history -->
+<!ELEMENT Entrez2-request_use-history EMPTY>
+<!ATTLIST Entrez2-request_use-history value ( true | false ) "false" >
+
+
+<!-- request types -->
+<!ELEMENT E2Request (
+        E2Request_get-info | 
+        E2Request_eval-boolean | 
+        E2Request_get-docsum | 
+        E2Request_get-term-pos | 
+        E2Request_get-term-list | 
+        E2Request_get-term-hierarchy | 
+        E2Request_get-links | 
+        E2Request_get-linked | 
+        E2Request_get-link-counts)>
+
+<!-- ask for info block -->
+<!ELEMENT E2Request_get-info EMPTY>
+
+<!-- Boolean lookup -->
+<!ELEMENT E2Request_eval-boolean (Entrez2-eval-boolean)>
+
+<!-- get the DocSums -->
+<!ELEMENT E2Request_get-docsum (Entrez2-id-list)>
+
+<!-- get position in term list -->
+<!ELEMENT E2Request_get-term-pos (Entrez2-term-query)>
+
+<!-- get Term list by position -->
+<!ELEMENT E2Request_get-term-list (Entrez2-term-pos)>
+
+<!-- get a hierarchy from a term -->
+<!ELEMENT E2Request_get-term-hierarchy (Entrez2-hier-query)>
+
+<!-- get specific links from a UID list -->
+<!ELEMENT E2Request_get-links (Entrez2-get-links)>
+
+<!-- get subset of UID list which has links -->
+<!ELEMENT E2Request_get-linked (Entrez2-get-links)>
+
+<!-- get all links from one UID -->
+<!ELEMENT E2Request_get-link-counts (Entrez2-id)>
+
+<!--
+****************************************
+ When evaluating a boolean query the counts of hits is always
+    returned.
+ In addition, you can request the UIDs of the hits or the
+    the parsed query in structured form (with counts by term),
+    or both.
+****************************************
+ evaluate Boolean query
+-->
+<!ELEMENT Entrez2-eval-boolean (
+        Entrez2-eval-boolean_return-UIDs?, 
+        Entrez2-eval-boolean_return-parse?, 
+        Entrez2-eval-boolean_query)>
+
+<!-- return UID list? -->
+<!ELEMENT Entrez2-eval-boolean_return-UIDs EMPTY>
+<!ATTLIST Entrez2-eval-boolean_return-UIDs value ( true | false ) "false" >
+
+
+<!-- return parsed query? -->
+<!ELEMENT Entrez2-eval-boolean_return-parse EMPTY>
+<!ATTLIST Entrez2-eval-boolean_return-parse value ( true | false ) "false" >
+
+
+<!-- the actual query -->
+<!ELEMENT Entrez2-eval-boolean_query (Entrez2-boolean-exp)>
+
+
+<!ELEMENT Entrez2-dt-filter (
+        Entrez2-dt-filter_begin-date, 
+        Entrez2-dt-filter_end-date, 
+        Entrez2-dt-filter_type-date)>
+<!--
+**************************************
+  Entrez2 common elements
+**************************************
+ a date/time stamp
+-->
+<!ELEMENT Entrez2-dt-filter_begin-date (Entrez2-dt)>
+<!--
+**************************************
+  Entrez2 common elements
+**************************************
+ a date/time stamp
+-->
+<!ELEMENT Entrez2-dt-filter_end-date (Entrez2-dt)>
+<!-- field name -->
+<!ELEMENT Entrez2-dt-filter_type-date (Entrez2-field-id)>
+
+<!-- date limits -->
+<!ELEMENT Entrez2-limits (
+        Entrez2-limits_filter-date?, 
+        Entrez2-limits_max-UIDs?, 
+        Entrez2-limits_offset-UIDs?)>
+
+<!ELEMENT Entrez2-limits_filter-date (Entrez2-dt-filter)>
+
+<!-- max UIDs to return in list -->
+<!ELEMENT Entrez2-limits_max-UIDs (%INTEGER;)>
+
+<!-- start partway into UID list -->
+<!ELEMENT Entrez2-limits_offset-UIDs (%INTEGER;)>
+
+<!-- a single UID -->
+<!ELEMENT Entrez2-id (
+        Entrez2-id_db, 
+        Entrez2-id_uid)>
+<!-- database name -->
+<!ELEMENT Entrez2-id_db (Entrez2-db-id)>
+
+<!ELEMENT Entrez2-id_uid (%INTEGER;)>
+
+
+<!ELEMENT Entrez2-term-query (
+        Entrez2-term-query_db, 
+        Entrez2-term-query_field, 
+        Entrez2-term-query_term)>
+<!-- database name -->
+<!ELEMENT Entrez2-term-query_db (Entrez2-db-id)>
+<!-- field name -->
+<!ELEMENT Entrez2-term-query_field (Entrez2-field-id)>
+
+<!ELEMENT Entrez2-term-query_term (#PCDATA)>
+
+
+<!ELEMENT Entrez2-hier-query (
+        Entrez2-hier-query_db, 
+        Entrez2-hier-query_field, 
+        Entrez2-hier-query_term?, 
+        Entrez2-hier-query_txid?)>
+<!-- database name -->
+<!ELEMENT Entrez2-hier-query_db (Entrez2-db-id)>
+<!-- field name -->
+<!ELEMENT Entrez2-hier-query_field (Entrez2-field-id)>
+
+<!-- query with either term -->
+<!ELEMENT Entrez2-hier-query_term (#PCDATA)>
+
+<!-- or Taxonomy ID -->
+<!ELEMENT Entrez2-hier-query_txid (%INTEGER;)>
+
+<!-- request portions of term list -->
+<!ELEMENT Entrez2-term-pos (
+        Entrez2-term-pos_db, 
+        Entrez2-term-pos_field, 
+        Entrez2-term-pos_first-term-pos, 
+        Entrez2-term-pos_number-of-terms?)>
+<!-- database name -->
+<!ELEMENT Entrez2-term-pos_db (Entrez2-db-id)>
+<!-- field name -->
+<!ELEMENT Entrez2-term-pos_field (Entrez2-field-id)>
+
+<!ELEMENT Entrez2-term-pos_first-term-pos (%INTEGER;)>
+
+<!-- optional for hierarchy only -->
+<!ELEMENT Entrez2-term-pos_number-of-terms (%INTEGER;)>
+
+<!-- request links of one type -->
+<!ELEMENT Entrez2-get-links (
+        Entrez2-get-links_uids, 
+        Entrez2-get-links_linktype, 
+        Entrez2-get-links_max-UIDS?, 
+        Entrez2-get-links_count-only?, 
+        Entrez2-get-links_parents-persist?)>
+
+<!-- docs to link from -->
+<!ELEMENT Entrez2-get-links_uids (Entrez2-id-list)>
+
+<!-- type of link -->
+<!ELEMENT Entrez2-get-links_linktype (Entrez2-link-id)>
+
+<!-- maximum number of links to return -->
+<!ELEMENT Entrez2-get-links_max-UIDS (%INTEGER;)>
+
+<!-- return only the counts -->
+<!ELEMENT Entrez2-get-links_count-only EMPTY>
+<!ATTLIST Entrez2-get-links_count-only value ( true | false ) #REQUIRED >
+
+
+<!-- allow original uids in list -->
+<!ELEMENT Entrez2-get-links_parents-persist EMPTY>
+<!ATTLIST Entrez2-get-links_parents-persist value ( true | false ) #REQUIRED >
+
+
+<!--
+**********************************************************
+ Replies from the Entrez server
+  all replies contain the date/time stamp when they were executed
+  to do reqular date bounded searches use this value+1 to search
+  again later instead of recording the date/time on the client machine
+  the cookie allows a simple key string to represent UID lists in the history
+**********************************************************
+-->
+<!ELEMENT Entrez2-reply (
+        Entrez2-reply_reply, 
+        Entrez2-reply_dt, 
+        Entrez2-reply_server, 
+        Entrez2-reply_msg?, 
+        Entrez2-reply_key?, 
+        Entrez2-reply_cookie?)>
+
+<!-- the actual reply -->
+<!ELEMENT Entrez2-reply_reply (E2Reply)>
+
+<!-- date/time stamp from server -->
+<!ELEMENT Entrez2-reply_dt (Entrez2-dt)>
+
+<!-- server version info -->
+<!ELEMENT Entrez2-reply_server (#PCDATA)>
+
+<!-- possibly a message to the user -->
+<!ELEMENT Entrez2-reply_msg (#PCDATA)>
+
+<!-- history key for query -->
+<!ELEMENT Entrez2-reply_key (#PCDATA)>
+
+<!-- history session cookie -->
+<!ELEMENT Entrez2-reply_cookie (#PCDATA)>
+
+
+<!ELEMENT E2Reply (
+        E2Reply_error | 
+        E2Reply_get-info | 
+        E2Reply_eval-boolean | 
+        E2Reply_get-docsum | 
+        E2Reply_get-term-pos | 
+        E2Reply_get-term-list | 
+        E2Reply_get-term-hierarchy | 
+        E2Reply_get-links | 
+        E2Reply_get-linked | 
+        E2Reply_get-link-counts)>
+
+<!-- if nothing can be returned -->
+<!ELEMENT E2Reply_error (#PCDATA)>
+
+<!-- the database info -->
+<!ELEMENT E2Reply_get-info (Entrez2-info)>
+
+<!-- result of boolean query -->
+<!ELEMENT E2Reply_eval-boolean (Entrez2-boolean-reply)>
+
+<!ELEMENT E2Reply_get-docsum (Entrez2-docsum-list)>
+
+<!-- position of the term -->
+<!ELEMENT E2Reply_get-term-pos (%INTEGER;)>
+
+<!ELEMENT E2Reply_get-term-list (Entrez2-term-list)>
+<!-- for hierarchical index -->
+<!ELEMENT E2Reply_get-term-hierarchy (Entrez2-hier-node)>
+<!--
+*******************************************
+ Links are returned in sets also using OCTET STRINGS
+*******************************************
+ set of links
+-->
+<!ELEMENT E2Reply_get-links (Entrez2-link-set)>
+<!-- list of record UIDs -->
+<!ELEMENT E2Reply_get-linked (Entrez2-id-list)>
+<!-- all links from 1 uid -->
+<!ELEMENT E2Reply_get-link-counts (Entrez2-link-count-list)>
+
+<!-- describes all the databases -->
+<!ELEMENT Entrez2-info (
+        Entrez2-info_db-count, 
+        Entrez2-info_build-date, 
+        Entrez2-info_db-info)>
+
+<!-- number of databases -->
+<!ELEMENT Entrez2-info_db-count (%INTEGER;)>
+
+<!-- build date of databases -->
+<!ELEMENT Entrez2-info_build-date (Entrez2-dt)>
+
+<!-- info by database -->
+<!ELEMENT Entrez2-info_db-info (Entrez2-db-info*)>
+
+<!-- info for one database -->
+<!ELEMENT Entrez2-db-info (
+        Entrez2-db-info_db-name, 
+        Entrez2-db-info_db-menu, 
+        Entrez2-db-info_db-descr, 
+        Entrez2-db-info_doc-count, 
+        Entrez2-db-info_field-count, 
+        Entrez2-db-info_fields, 
+        Entrez2-db-info_link-count, 
+        Entrez2-db-info_links, 
+        Entrez2-db-info_docsum-field-count, 
+        Entrez2-db-info_docsum-fields)>
+
+<!-- internal name -->
+<!ELEMENT Entrez2-db-info_db-name (Entrez2-db-id)>
+
+<!-- short name for menu -->
+<!ELEMENT Entrez2-db-info_db-menu (#PCDATA)>
+
+<!-- longer explanatory name -->
+<!ELEMENT Entrez2-db-info_db-descr (#PCDATA)>
+
+<!-- total number of records -->
+<!ELEMENT Entrez2-db-info_doc-count (%INTEGER;)>
+
+<!-- number of field types -->
+<!ELEMENT Entrez2-db-info_field-count (%INTEGER;)>
+
+<!ELEMENT Entrez2-db-info_fields (Entrez2-field-info*)>
+
+<!-- number of link types -->
+<!ELEMENT Entrez2-db-info_link-count (%INTEGER;)>
+
+<!ELEMENT Entrez2-db-info_links (Entrez2-link-info*)>
+
+<!ELEMENT Entrez2-db-info_docsum-field-count (%INTEGER;)>
+
+<!ELEMENT Entrez2-db-info_docsum-fields (Entrez2-docsum-field-info*)>
+
+<!-- info about one field -->
+<!ELEMENT Entrez2-field-info (
+        Entrez2-field-info_field-name, 
+        Entrez2-field-info_field-menu, 
+        Entrez2-field-info_field-descr, 
+        Entrez2-field-info_term-count, 
+        Entrez2-field-info_is-date?, 
+        Entrez2-field-info_is-numerical?, 
+        Entrez2-field-info_single-token?, 
+        Entrez2-field-info_hierarchy-avail?, 
+        Entrez2-field-info_is-rangable?, 
+        Entrez2-field-info_is-truncatable?)>
+
+<!-- the internal name -->
+<!ELEMENT Entrez2-field-info_field-name (Entrez2-field-id)>
+
+<!-- short string suitable for menu -->
+<!ELEMENT Entrez2-field-info_field-menu (#PCDATA)>
+
+<!-- longer, explanatory name -->
+<!ELEMENT Entrez2-field-info_field-descr (#PCDATA)>
+
+<!-- number of terms in field -->
+<!ELEMENT Entrez2-field-info_term-count (%INTEGER;)>
+
+<!ELEMENT Entrez2-field-info_is-date EMPTY>
+<!ATTLIST Entrez2-field-info_is-date value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Entrez2-field-info_is-numerical EMPTY>
+<!ATTLIST Entrez2-field-info_is-numerical value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Entrez2-field-info_single-token EMPTY>
+<!ATTLIST Entrez2-field-info_single-token value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Entrez2-field-info_hierarchy-avail EMPTY>
+<!ATTLIST Entrez2-field-info_hierarchy-avail value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Entrez2-field-info_is-rangable EMPTY>
+<!ATTLIST Entrez2-field-info_is-rangable value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Entrez2-field-info_is-truncatable EMPTY>
+<!ATTLIST Entrez2-field-info_is-truncatable value ( true | false ) #REQUIRED >
+
+
+<!-- info about one link -->
+<!ELEMENT Entrez2-link-info (
+        Entrez2-link-info_link-name, 
+        Entrez2-link-info_link-menu, 
+        Entrez2-link-info_link-descr, 
+        Entrez2-link-info_db-to, 
+        Entrez2-link-info_data-size?)>
+<!-- link name -->
+<!ELEMENT Entrez2-link-info_link-name (Entrez2-link-id)>
+
+<!ELEMENT Entrez2-link-info_link-menu (#PCDATA)>
+
+<!ELEMENT Entrez2-link-info_link-descr (#PCDATA)>
+
+<!-- database it links to -->
+<!ELEMENT Entrez2-link-info_db-to (Entrez2-db-id)>
+
+<!-- size of link data element     -->
+<!ELEMENT Entrez2-link-info_data-size (%INTEGER;)>
+
+
+<!ELEMENT Entrez2-docsum-field-type (%INTEGER;)>
+<!ATTLIST Entrez2-docsum-field-type value (
+        string |
+        int |
+        float |
+        date-pubmed
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Entrez2-docsum-field-info (
+        Entrez2-docsum-field-info_field-name, 
+        Entrez2-docsum-field-info_field-description, 
+        Entrez2-docsum-field-info_field-type)>
+
+<!ELEMENT Entrez2-docsum-field-info_field-name (#PCDATA)>
+
+<!ELEMENT Entrez2-docsum-field-info_field-description (#PCDATA)>
+
+<!ELEMENT Entrez2-docsum-field-info_field-type (Entrez2-docsum-field-type)>
+
+
+<!ELEMENT Entrez2-boolean-reply (
+        Entrez2-boolean-reply_count, 
+        Entrez2-boolean-reply_uids?, 
+        Entrez2-boolean-reply_query?)>
+
+<!-- records hit -->
+<!ELEMENT Entrez2-boolean-reply_count (%INTEGER;)>
+
+<!-- if uids requested -->
+<!ELEMENT Entrez2-boolean-reply_uids (Entrez2-id-list)>
+
+<!-- if parsed query requested -->
+<!ELEMENT Entrez2-boolean-reply_query (Entrez2-boolean-exp)>
+
+
+<!ELEMENT Entrez2-docsum-list (
+        Entrez2-docsum-list_count, 
+        Entrez2-docsum-list_list)>
+
+<!-- number of docsums -->
+<!ELEMENT Entrez2-docsum-list_count (%INTEGER;)>
+
+<!ELEMENT Entrez2-docsum-list_list (Entrez2-docsum*)>
+
+
+<!ELEMENT Entrez2-docsum (
+        Entrez2-docsum_uid, 
+        Entrez2-docsum_docsum-data)>
+
+<!-- primary uid (gi, pubmedid) -->
+<!ELEMENT Entrez2-docsum_uid (%INTEGER;)>
+
+<!ELEMENT Entrez2-docsum_docsum-data (Entrez2-docsum-data*)>
+
+
+<!ELEMENT Entrez2-docsum-data (
+        Entrez2-docsum-data_field-name, 
+        Entrez2-docsum-data_field-value)>
+
+<!ELEMENT Entrez2-docsum-data_field-name (#PCDATA)>
+
+<!ELEMENT Entrez2-docsum-data_field-value (#PCDATA)>
+
+
+<!ELEMENT Entrez2-term-list (
+        Entrez2-term-list_pos, 
+        Entrez2-term-list_num, 
+        Entrez2-term-list_list)>
+
+<!-- position of first term in list -->
+<!ELEMENT Entrez2-term-list_pos (%INTEGER;)>
+
+<!-- number of terms in list -->
+<!ELEMENT Entrez2-term-list_num (%INTEGER;)>
+
+<!ELEMENT Entrez2-term-list_list (Entrez2-term*)>
+
+
+<!ELEMENT Entrez2-term (
+        Entrez2-term_term, 
+        Entrez2-term_txid?, 
+        Entrez2-term_count, 
+        Entrez2-term_is-leaf-node?)>
+
+<!ELEMENT Entrez2-term_term (#PCDATA)>
+
+<!ELEMENT Entrez2-term_txid (%INTEGER;)>
+
+<!-- count of records with this term -->
+<!ELEMENT Entrez2-term_count (%INTEGER;)>
+
+<!-- used for hierarchy only -->
+<!ELEMENT Entrez2-term_is-leaf-node EMPTY>
+<!ATTLIST Entrez2-term_is-leaf-node value ( true | false ) #REQUIRED >
+
+
+<!-- for hierarchical index -->
+<!ELEMENT Entrez2-hier-node (
+        Entrez2-hier-node_cannonical-form, 
+        Entrez2-hier-node_lineage-count, 
+        Entrez2-hier-node_lineage?, 
+        Entrez2-hier-node_child-count, 
+        Entrez2-hier-node_children, 
+        Entrez2-hier-node_is-ambiguous?)>
+
+<!-- the official name -->
+<!ELEMENT Entrez2-hier-node_cannonical-form (#PCDATA)>
+
+<!-- number of strings in lineage -->
+<!ELEMENT Entrez2-hier-node_lineage-count (%INTEGER;)>
+
+<!-- strings up the lineage -->
+<!ELEMENT Entrez2-hier-node_lineage (Entrez2-term*)>
+
+<!-- number of children of this node -->
+<!ELEMENT Entrez2-hier-node_child-count (%INTEGER;)>
+
+<!-- the children -->
+<!ELEMENT Entrez2-hier-node_children (Entrez2-term*)>
+
+<!-- used for hierarchy only -->
+<!ELEMENT Entrez2-hier-node_is-ambiguous EMPTY>
+<!ATTLIST Entrez2-hier-node_is-ambiguous value ( true | false ) #REQUIRED >
+
+
+<!--
+*******************************************
+ Links are returned in sets also using OCTET STRINGS
+*******************************************
+ set of links
+-->
+<!ELEMENT Entrez2-link-set (
+        Entrez2-link-set_ids, 
+        Entrez2-link-set_data-size?, 
+        Entrez2-link-set_data?)>
+<!-- list of record UIDs -->
+<!ELEMENT Entrez2-link-set_ids (Entrez2-id-list)>
+
+<!-- size of data elements -->
+<!ELEMENT Entrez2-link-set_data-size (%INTEGER;)>
+
+<!-- coded scores -->
+<!ELEMENT Entrez2-link-set_data (%OCTETS;)>
+
+<!-- all links from 1 uid -->
+<!ELEMENT Entrez2-link-count-list (
+        Entrez2-link-count-list_link-type-count, 
+        Entrez2-link-count-list_links)>
+
+<!-- number of types of links -->
+<!ELEMENT Entrez2-link-count-list_link-type-count (%INTEGER;)>
+
+<!ELEMENT Entrez2-link-count-list_links (Entrez2-link-count*)>
+
+<!-- link count of one type -->
+<!ELEMENT Entrez2-link-count (
+        Entrez2-link-count_link-type, 
+        Entrez2-link-count_link-count)>
+<!-- link name -->
+<!ELEMENT Entrez2-link-count_link-type (Entrez2-link-id)>
+
+<!ELEMENT Entrez2-link-count_link-count (%INTEGER;)>
+
diff --git a/dtd/NCBI_Entrezgene.dtd b/dtd/NCBI_Entrezgene.dtd
new file mode 100644
index 0000000..36e206f
--- /dev/null
+++ b/dtd/NCBI_Entrezgene.dtd
@@ -0,0 +1,89 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "entrezgene.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Entrezgene.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Entrezgene_module PUBLIC "-//NCBI//NCBI Entrezgene Module//EN" "NCBI_Entrezgene.mod.dtd">
+%NCBI_Entrezgene_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Entrezgene.mod.dtd b/dtd/NCBI_Entrezgene.mod.dtd
new file mode 100644
index 0000000..c75d32f
--- /dev/null
+++ b/dtd/NCBI_Entrezgene.mod.dtd
@@ -0,0 +1,394 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "entrezgene.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 03/01/2017 23:04:04
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Entrezgene"
+================================================= -->
+
+<!--
+$Revision: 529103 $ 
+********************************************************************** 
+ 
+  NCBI Entrezgene 
+  by James Ostell, 2001 
+   
+  Generic "Gene" object for Entrez Genes 
+    This object is designed to incorporate a subset of information from 
+    LocusLink and from records in Entrez Genomes to provide indexing, 
+    linkage, and a useful summary report in Entrez for "Genes" 
+ 
+********************************************************************** 
+-->
+
+<!-- Elements used by other modules:
+          Entrezgene,
+          Entrezgene-Set,
+          Gene-track,
+          Gene-commentary -->
+
+<!-- Elements referenced from other modules:
+          Gene-ref FROM NCBI-Gene,
+          Prot-ref FROM NCBI-Protein,
+          BioSource FROM NCBI-BioSource,
+          RNA-ref FROM NCBI-RNA,
+          Dbtag,
+          Date FROM NCBI-General,
+          Seq-loc FROM NCBI-Seqloc,
+          Pub FROM NCBI-Pub -->
+<!-- ============================================ -->
+
+<!--
+******************************************** 
+ Entrezgene is the "document" indexed in Entrez 
+  and presented in the full display 
+ It also contains the Entrez ID and date information 
+******************************************* 
+-->
+<!ELEMENT Entrezgene (
+        Entrezgene_track-info?, 
+        Entrezgene_type, 
+        Entrezgene_source, 
+        Entrezgene_gene, 
+        Entrezgene_prot?, 
+        Entrezgene_rna?, 
+        Entrezgene_summary?, 
+        Entrezgene_location?, 
+        Entrezgene_gene-source?, 
+        Entrezgene_locus?, 
+        Entrezgene_properties?, 
+        Entrezgene_refgene?, 
+        Entrezgene_homology?, 
+        Entrezgene_comments?, 
+        Entrezgene_unique-keys?, 
+        Entrezgene_xtra-index-terms?, 
+        Entrezgene_xtra-properties?, 
+        Entrezgene_xtra-iq?, 
+        Entrezgene_non-unique-keys?)>
+
+<!-- not in submission, but in retrieval  -->
+<!ELEMENT Entrezgene_track-info (Gene-track)>
+<!-- type of Gene -->
+<!ELEMENT Entrezgene_type (%INTEGER;)>
+<!ATTLIST Entrezgene_type value (
+        unknown |
+        tRNA |
+        rRNA |
+        snRNA |
+        scRNA |
+        snoRNA |
+        protein-coding |
+        pseudo |
+        transposon |
+        miscRNA |
+        ncRNA |
+        biological-region |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Entrezgene_source (BioSource)>
+
+<!-- for locus-tag see note 3 -->
+<!ELEMENT Entrezgene_gene (Gene-ref)>
+
+<!ELEMENT Entrezgene_prot (Prot-ref)>
+
+<!ELEMENT Entrezgene_rna (RNA-ref)>
+
+<!-- short summary  -->
+<!ELEMENT Entrezgene_summary (#PCDATA)>
+
+<!ELEMENT Entrezgene_location (Maps*)>
+
+<!-- NCBI source to Entrez  -->
+<!ELEMENT Entrezgene_gene-source (Gene-source)>
+
+<!--
+ location of gene on chromosome (if known)
+ and all information about products
+ (mRNA, proteins and so on)
+-->
+<!ELEMENT Entrezgene_locus (Gene-commentary*)>
+
+<!ELEMENT Entrezgene_properties (Gene-commentary*)>
+
+<!-- NG for this?  -->
+<!ELEMENT Entrezgene_refgene (Gene-commentary*)>
+
+<!ELEMENT Entrezgene_homology (Gene-commentary*)>
+
+<!ELEMENT Entrezgene_comments (Gene-commentary*)>
+
+<!-- see note 3 -->
+<!ELEMENT Entrezgene_unique-keys (Dbtag*)>
+
+<!-- see note 2 -->
+<!ELEMENT Entrezgene_xtra-index-terms (Entrezgene_xtra-index-terms_E*)>
+
+
+<!ELEMENT Entrezgene_xtra-index-terms_E (#PCDATA)>
+
+<!-- see note 2 -->
+<!ELEMENT Entrezgene_xtra-properties (Xtra-Terms*)>
+
+<!-- see note 2 -->
+<!ELEMENT Entrezgene_xtra-iq (Xtra-Terms*)>
+
+<!ELEMENT Entrezgene_non-unique-keys (Dbtag*)>
+
+
+<!ELEMENT Entrezgene-Set (Entrezgene*)>
+
+
+<!ELEMENT Gene-track (
+        Gene-track_geneid, 
+        Gene-track_status?, 
+        Gene-track_current-id?, 
+        Gene-track_create-date, 
+        Gene-track_update-date, 
+        Gene-track_discontinue-date?)>
+
+<!-- required unique document id  -->
+<!ELEMENT Gene-track_geneid (%INTEGER;)>
+
+<!ELEMENT Gene-track_status (%INTEGER;)>
+
+<!--
+    secondary	-  synonym with merged
+    discontinued	-  'deleted', still index and display to public
+-->
+<!ATTLIST Gene-track_status value (
+        live |
+        secondary |
+        discontinued
+        ) #IMPLIED >
+
+
+<!-- see note 1 below -->
+<!ELEMENT Gene-track_current-id (Dbtag*)>
+
+<!-- date created in Entrez  -->
+<!ELEMENT Gene-track_create-date (Date)>
+
+<!-- last date updated in Entrez  -->
+<!ELEMENT Gene-track_update-date (Date)>
+
+<!-- -->
+<!ELEMENT Gene-track_discontinue-date (Date)>
+
+
+<!ELEMENT Gene-source (
+        Gene-source_src, 
+        Gene-source_src-int?, 
+        Gene-source_src-str1?, 
+        Gene-source_src-str2?, 
+        Gene-source_gene-display?, 
+        Gene-source_locus-display?, 
+        Gene-source_extra-terms?)>
+
+<!-- key to the source within NCBI locuslink, Ecoli, etc  -->
+<!ELEMENT Gene-source_src (#PCDATA)>
+
+<!-- eg. locuslink id  -->
+<!ELEMENT Gene-source_src-int (%INTEGER;)>
+
+<!-- eg. chromosome1  -->
+<!ELEMENT Gene-source_src-str1 (#PCDATA)>
+
+<!-- see note 3 -->
+<!ELEMENT Gene-source_src-str2 (#PCDATA)>
+
+<!-- do we have a URL for gene display?  -->
+<!ELEMENT Gene-source_gene-display EMPTY>
+<!ATTLIST Gene-source_gene-display value ( true | false ) "false" >
+
+
+<!-- do we have a URL for map/locus display?  -->
+<!ELEMENT Gene-source_locus-display EMPTY>
+<!ATTLIST Gene-source_locus-display value ( true | false ) "false" >
+
+
+<!-- do we have a URL for extra indexing terms?  -->
+<!ELEMENT Gene-source_extra-terms EMPTY>
+<!ATTLIST Gene-source_extra-terms value ( true | false ) "false" >
+
+
+
+<!ELEMENT Gene-commentary (
+        Gene-commentary_type, 
+        Gene-commentary_heading?, 
+        Gene-commentary_label?, 
+        Gene-commentary_text?, 
+        Gene-commentary_accession?, 
+        Gene-commentary_version?, 
+        Gene-commentary_xtra-properties?, 
+        Gene-commentary_refs?, 
+        Gene-commentary_source?, 
+        Gene-commentary_genomic-coords?, 
+        Gene-commentary_seqs?, 
+        Gene-commentary_products?, 
+        Gene-commentary_properties?, 
+        Gene-commentary_comment?, 
+        Gene-commentary_create-date?, 
+        Gene-commentary_update-date?, 
+        Gene-commentary_rna?)>
+<!-- type of Gene Commentary -->
+<!ELEMENT Gene-commentary_type (%INTEGER;)>
+
+<!--
+    property	-  used to display tag/value pair
+         for this type label is used as property tag, text is used as property value, 
+         other fields are not used.
+    reference	-  currently not used             
+    generif	-  to include generif in the main blob             
+    phenotype	-  to display phenotype information
+    complex	-  used (but not limited) to identify resulting 
+         interaction complexes
+    compound	-  pubchem entities
+    gene-group	-  for relationship sets (such as pseudogene / parent gene)
+    assembly	-  for full assembly accession
+    assembly-unit	-  for the assembly unit corresponding to the refseq
+-->
+<!ATTLIST Gene-commentary_type value (
+        genomic |
+        pre-RNA |
+        mRNA |
+        rRNA |
+        tRNA |
+        snRNA |
+        scRNA |
+        peptide |
+        other-genetic |
+        genomic-mRNA |
+        cRNA |
+        mature-peptide |
+        pre-protein |
+        miscRNA |
+        snoRNA |
+        property |
+        reference |
+        generif |
+        phenotype |
+        complex |
+        compound |
+        ncRNA |
+        gene-group |
+        assembly |
+        assembly-unit |
+        c-region |
+        d-segment |
+        j-segment |
+        v-segment |
+        comment |
+        other
+        ) #IMPLIED >
+
+
+<!-- appears above text  -->
+<!ELEMENT Gene-commentary_heading (#PCDATA)>
+
+<!--
+ occurs to left of text
+ for protein and RNA types it is a name
+ for property type it is a property tag  
+-->
+<!ELEMENT Gene-commentary_label (#PCDATA)>
+
+<!--
+ block of text 
+ for property type it is a property value  
+-->
+<!ELEMENT Gene-commentary_text (#PCDATA)>
+
+<!-- accession for the gi in the seqloc, see note 3 -->
+<!ELEMENT Gene-commentary_accession (#PCDATA)>
+
+<!-- version for the accession above -->
+<!ELEMENT Gene-commentary_version (%INTEGER;)>
+
+<!-- see note 2 -->
+<!ELEMENT Gene-commentary_xtra-properties (Xtra-Terms*)>
+
+<!-- refs for this  -->
+<!ELEMENT Gene-commentary_refs (Pub*)>
+
+<!-- links and refs  -->
+<!ELEMENT Gene-commentary_source (Other-source*)>
+
+<!-- referenced sequences in genomic coords -->
+<!ELEMENT Gene-commentary_genomic-coords (Seq-loc*)>
+
+<!-- referenced sequences in non-genomic coords -->
+<!ELEMENT Gene-commentary_seqs (Seq-loc*)>
+
+<!ELEMENT Gene-commentary_products (Gene-commentary*)>
+
+<!ELEMENT Gene-commentary_properties (Gene-commentary*)>
+
+<!ELEMENT Gene-commentary_comment (Gene-commentary*)>
+
+<!ELEMENT Gene-commentary_create-date (Date)>
+
+<!ELEMENT Gene-commentary_update-date (Date)>
+
+<!ELEMENT Gene-commentary_rna (RNA-ref)>
+
+
+<!ELEMENT Other-source (
+        Other-source_src?, 
+        Other-source_pre-text?, 
+        Other-source_anchor?, 
+        Other-source_url?, 
+        Other-source_post-text?)>
+
+<!-- key to non-ncbi source  -->
+<!ELEMENT Other-source_src (Dbtag)>
+
+<!-- text before anchor  -->
+<!ELEMENT Other-source_pre-text (#PCDATA)>
+
+<!-- text to show as highlight  -->
+<!ELEMENT Other-source_anchor (#PCDATA)>
+
+<!-- if present, use this URL not Dbtag and datbase  -->
+<!ELEMENT Other-source_url (#PCDATA)>
+
+<!-- text after anchor  -->
+<!ELEMENT Other-source_post-text (#PCDATA)>
+
+
+<!ELEMENT Maps (
+        Maps_display-str, 
+        Maps_method)>
+
+<!ELEMENT Maps_display-str (#PCDATA)>
+
+<!ELEMENT Maps_method (
+        Maps_method_proxy | 
+        Maps_method_map-type)>
+
+<!--url to non mapviewer mapviewing resource -->
+<!ELEMENT Maps_method_proxy (#PCDATA)>
+<!-- units used in display-str to query mapviewer  -->
+<!ELEMENT Maps_method_map-type %ENUM;>
+<!ATTLIST Maps_method_map-type value (
+        cyto |
+        bp |
+        cM |
+        cR |
+        min
+        ) #REQUIRED >
+
+
+<!-- see note 2 -->
+<!ELEMENT Xtra-Terms (
+        Xtra-Terms_tag, 
+        Xtra-Terms_value)>
+
+<!ELEMENT Xtra-Terms_tag (#PCDATA)>
+
+<!ELEMENT Xtra-Terms_value (#PCDATA)>
+
diff --git a/dtd/NCBI_FeatDef.dtd b/dtd/NCBI_FeatDef.dtd
new file mode 100644
index 0000000..a3ce559
--- /dev/null
+++ b/dtd/NCBI_FeatDef.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "featdef.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_FeatDef.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_FeatDef_module PUBLIC "-//NCBI//NCBI FeatDef Module//EN" "NCBI_FeatDef.mod.dtd">
+%NCBI_FeatDef_module;
diff --git a/dtd/NCBI_FeatDef.mod.dtd b/dtd/NCBI_FeatDef.mod.dtd
new file mode 100644
index 0000000..65fbf90
--- /dev/null
+++ b/dtd/NCBI_FeatDef.mod.dtd
@@ -0,0 +1,97 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "featdef.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-FeatDef"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+**********************************************************************
+
+  NCBI Sequence Feature Definition Module
+  by James Ostell, 1994
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          FeatDef,
+          FeatDefSet,
+          FeatDispGroup,
+          FeatDispGroupSet -->
+<!-- ============================================ -->
+
+
+<!ELEMENT FeatDef (
+        FeatDef_typelabel, 
+        FeatDef_menulabel, 
+        FeatDef_featdef-key, 
+        FeatDef_seqfeat-key, 
+        FeatDef_entrygroup, 
+        FeatDef_displaygroup, 
+        FeatDef_molgroup)>
+
+<!-- short label for type eg "CDS" -->
+<!ELEMENT FeatDef_typelabel (#PCDATA)>
+
+<!-- label for a menu eg "Coding Region" -->
+<!ELEMENT FeatDef_menulabel (#PCDATA)>
+
+<!-- unique for this feature definition -->
+<!ELEMENT FeatDef_featdef-key (%INTEGER;)>
+
+<!-- SeqFeat.data.choice from objfeat.h -->
+<!ELEMENT FeatDef_seqfeat-key (%INTEGER;)>
+
+<!-- Group for data entry -->
+<!ELEMENT FeatDef_entrygroup (%INTEGER;)>
+
+<!-- Group for data display -->
+<!ELEMENT FeatDef_displaygroup (%INTEGER;)>
+
+<!-- Type of Molecule used for -->
+<!ELEMENT FeatDef_molgroup (FeatMolType)>
+
+
+<!ELEMENT FeatMolType %ENUM;>
+
+<!--
+    aa	-  proteins
+    na	-  nucleic acids
+    both	-  both
+-->
+<!ATTLIST FeatMolType value (
+        aa |
+        na |
+        both
+        ) #REQUIRED >
+
+
+<!-- collections of defintions -->
+<!ELEMENT FeatDefSet (FeatDef*)>
+
+
+<!ELEMENT FeatDispGroup (
+        FeatDispGroup_groupkey, 
+        FeatDispGroup_groupname)>
+
+<!ELEMENT FeatDispGroup_groupkey (%INTEGER;)>
+
+<!ELEMENT FeatDispGroup_groupname (#PCDATA)>
+
+
+<!ELEMENT FeatDispGroupSet (FeatDispGroup*)>
+
+
+<!ELEMENT FeatDefGroupSet (
+        FeatDefGroupSet_groups, 
+        FeatDefGroupSet_defs)>
+
+<!ELEMENT FeatDefGroupSet_groups (FeatDispGroupSet)>
+<!-- collections of defintions -->
+<!ELEMENT FeatDefGroupSet_defs (FeatDefSet)>
+
diff --git a/dtd/NCBI_GBSeq.dtd b/dtd/NCBI_GBSeq.dtd
new file mode 100644
index 0000000..d317e96
--- /dev/null
+++ b/dtd/NCBI_GBSeq.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "gbseq.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_GBSeq.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_GBSeq_module PUBLIC "-//NCBI//NCBI GBSeq Module//EN" "NCBI_GBSeq.mod.dtd">
+%NCBI_GBSeq_module;
diff --git a/dtd/NCBI_GBSeq.mod.dtd b/dtd/NCBI_GBSeq.mod.dtd
new file mode 100644
index 0000000..95be4f3
--- /dev/null
+++ b/dtd/NCBI_GBSeq.mod.dtd
@@ -0,0 +1,407 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "gbseq.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 12/18/2013 23:04:02
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-GBSeq"
+================================================= -->
+
+<!--
+$Revision: 413850 $
+*********************************************************
+
+ ASN.1 and XML for the components of a GenBank format sequence
+ J.Ostell 2002
+ Updated 25 May 2010
+
+*********************************************************
+-->
+
+<!--
+********
+  GBSeq represents the elements in a GenBank style report
+    of a sequence with some small additions to structure and support
+    for protein (GenPept) versions of GenBank format as seen in
+    Entrez. While this represents the simplification, reduction of
+    detail, and flattening to a single sequence perspective of GenBank
+    format (compared with the full ASN.1 or XML from which GenBank and
+    this format is derived at NCBI), it is presented in ASN.1 or XML for
+    automated parsing and processing. It is hoped that this compromise
+    will be useful for those bulk processing at the GenBank format level
+    of detail today. Since it is a compromise, a number of pragmatic
+    decisions have been made.
+
+  In pursuit of simplicity and familiarity a number of
+    fields do not have full substructure defined here where there is
+    already a standard GenBank format string. For example:
+
+   Date  DD-Mon-YYYY
+   Authors   LastName, Intials (with periods)
+   Journal   JounalName Volume (issue), page-range (year)
+   FeatureLocations as per GenBank feature table, but FeatureIntervals
+    may also be provided as a convenience
+   FeatureQualifiers  as per GenBank feature table
+   Primary has a string that represents a table to construct
+    a third party (TPA) sequence.
+   other-seqids can have strings with the "vertical bar format" sequence
+    identifiers used in BLAST for example, when they are non-genbank types.
+    Currently in GenBank format you only see GI, but there are others, like
+    patents, submitter clone names, etc which will appear here, as they
+    always have in the ASN.1 format, and full XML format.
+   source-db is a formatted text block for peptides in GenPept format that
+    carries information from the source protein database.
+
+  There are also a number of elements that could have been
+   more exactly specified, but in the interest of simplicity
+   have been simply left as options. For example..
+
+  accession and accession.version will always appear in a GenBank record
+   they are optional because this format can also be used for non-GenBank
+   sequences, and in that case will have only "other-seqids".
+
+  sequences will normally all have "sequence" filled in. But contig records
+    will have a "join" statement in the "contig" slot, and no "sequence".
+    We also may consider a retrieval option with no sequence of any kind
+     and no feature table to quickly check minimal values.
+
+  a reference may have an author list, or be from a consortium, or both.
+
+  some fields, such as taxonomy, do appear as separate elements in GenBank
+    format but without a specific linetype (in GenBank format this comes
+    under ORGANISM). Another example is the separation of primary accession
+    from the list of secondary accessions. In GenBank format primary
+    accession is just the first one on the list that includes all secondaries
+    after it.
+
+  create-date deserves special comment. The date you see on the right hand
+    side of the LOCUS line in GenBank format is actually the last date the
+    the record was modified (or the update-date). The date the record was
+    first submitted to GenBank appears in the first submission citation in
+    the reference section. Internally in the databases and ASN.1 NCBI keeps
+    the first date the record was released into the sequence database at
+    NCBI as create-date. For records from EMBL, which supports create-date,
+    it is the date provided by EMBL. For DDBJ records, which do not supply
+    a create-date (same as GenBank format) the create-date is the first date
+    NCBI saw the record from DDBJ. For older GenBank records, before NCBI
+    took responsibility for GenBank, it is just the first date NCBI saw the
+    record. Create-date can be very useful, so we expose it here, but users
+    must understand it is only an approximation and comes from many sources,
+    and with many exceptions and caveats. It does NOT tell you the first
+    date the public might have seen this record and thus is NOT an accurate
+    measure for legal issues of precedence.
+
+********
+-->
+<!ELEMENT GBSet (GBSeq*)>
+
+
+<!ELEMENT GBSeq (
+        GBSeq_locus?, 
+        GBSeq_length, 
+        GBSeq_strandedness?, 
+        GBSeq_moltype, 
+        GBSeq_topology?, 
+        GBSeq_division?, 
+        GBSeq_update-date?, 
+        GBSeq_create-date?, 
+        GBSeq_update-release?, 
+        GBSeq_create-release?, 
+        GBSeq_definition?, 
+        GBSeq_primary-accession?, 
+        GBSeq_entry-version?, 
+        GBSeq_accession-version?, 
+        GBSeq_other-seqids?, 
+        GBSeq_secondary-accessions?, 
+        GBSeq_project?, 
+        GBSeq_keywords?, 
+        GBSeq_segment?, 
+        GBSeq_source?, 
+        GBSeq_organism?, 
+        GBSeq_taxonomy?, 
+        GBSeq_references?, 
+        GBSeq_comment?, 
+        GBSeq_comment-set?, 
+        GBSeq_struc-comments?, 
+        GBSeq_primary?, 
+        GBSeq_source-db?, 
+        GBSeq_database-reference?, 
+        GBSeq_feature-table?, 
+        GBSeq_feature-set?, 
+        GBSeq_sequence?, 
+        GBSeq_contig?, 
+        GBSeq_alt-seq?, 
+        GBSeq_xrefs?)>
+
+<!ELEMENT GBSeq_locus (#PCDATA)>
+
+<!ELEMENT GBSeq_length (%INTEGER;)>
+
+<!ELEMENT GBSeq_strandedness (#PCDATA)>
+
+<!ELEMENT GBSeq_moltype (#PCDATA)>
+
+<!ELEMENT GBSeq_topology (#PCDATA)>
+
+<!ELEMENT GBSeq_division (#PCDATA)>
+
+<!ELEMENT GBSeq_update-date (#PCDATA)>
+
+<!ELEMENT GBSeq_create-date (#PCDATA)>
+
+<!ELEMENT GBSeq_update-release (#PCDATA)>
+
+<!ELEMENT GBSeq_create-release (#PCDATA)>
+
+<!ELEMENT GBSeq_definition (#PCDATA)>
+
+<!ELEMENT GBSeq_primary-accession (#PCDATA)>
+
+<!ELEMENT GBSeq_entry-version (#PCDATA)>
+
+<!ELEMENT GBSeq_accession-version (#PCDATA)>
+
+<!ELEMENT GBSeq_other-seqids (GBSeqid*)>
+
+<!ELEMENT GBSeq_secondary-accessions (GBSecondary-accn*)>
+
+<!ELEMENT GBSeq_project (#PCDATA)>
+
+<!ELEMENT GBSeq_keywords (GBKeyword*)>
+
+<!ELEMENT GBSeq_segment (#PCDATA)>
+
+<!ELEMENT GBSeq_source (#PCDATA)>
+
+<!ELEMENT GBSeq_organism (#PCDATA)>
+
+<!ELEMENT GBSeq_taxonomy (#PCDATA)>
+
+<!ELEMENT GBSeq_references (GBReference*)>
+
+<!ELEMENT GBSeq_comment (#PCDATA)>
+
+<!ELEMENT GBSeq_comment-set (GBComment*)>
+
+<!ELEMENT GBSeq_struc-comments (GBStrucComment*)>
+
+<!ELEMENT GBSeq_primary (#PCDATA)>
+
+<!ELEMENT GBSeq_source-db (#PCDATA)>
+
+<!ELEMENT GBSeq_database-reference (#PCDATA)>
+
+<!ELEMENT GBSeq_feature-table (GBFeature*)>
+
+<!ELEMENT GBSeq_feature-set (GBFeatureSet*)>
+
+<!-- Optional for contig, wgs, etc. -->
+<!ELEMENT GBSeq_sequence (#PCDATA)>
+
+<!ELEMENT GBSeq_contig (#PCDATA)>
+
+<!ELEMENT GBSeq_alt-seq (GBAltSeqData*)>
+
+<!ELEMENT GBSeq_xrefs (GBXref*)>
+
+
+<!ELEMENT GBSeqid (#PCDATA)>
+
+
+<!ELEMENT GBSecondary-accn (#PCDATA)>
+
+
+<!ELEMENT GBKeyword (#PCDATA)>
+
+
+<!ELEMENT GBReference (
+        GBReference_reference, 
+        GBReference_position?, 
+        GBReference_authors?, 
+        GBReference_consortium?, 
+        GBReference_title?, 
+        GBReference_journal, 
+        GBReference_xref?, 
+        GBReference_pubmed?, 
+        GBReference_remark?)>
+
+<!ELEMENT GBReference_reference (#PCDATA)>
+
+<!ELEMENT GBReference_position (#PCDATA)>
+
+<!ELEMENT GBReference_authors (GBAuthor*)>
+
+<!ELEMENT GBReference_consortium (#PCDATA)>
+
+<!ELEMENT GBReference_title (#PCDATA)>
+
+<!ELEMENT GBReference_journal (#PCDATA)>
+
+<!ELEMENT GBReference_xref (GBXref*)>
+
+<!ELEMENT GBReference_pubmed (%INTEGER;)>
+
+<!ELEMENT GBReference_remark (#PCDATA)>
+
+
+<!ELEMENT GBAuthor (#PCDATA)>
+
+
+<!ELEMENT GBXref (
+        GBXref_dbname, 
+        GBXref_id)>
+
+<!ELEMENT GBXref_dbname (#PCDATA)>
+
+<!ELEMENT GBXref_id (#PCDATA)>
+
+
+<!ELEMENT GBComment (
+        GBComment_type?, 
+        GBComment_paragraphs)>
+
+<!ELEMENT GBComment_type (#PCDATA)>
+
+<!ELEMENT GBComment_paragraphs (GBCommentParagraph*)>
+
+
+<!ELEMENT GBCommentParagraph (#PCDATA)>
+
+
+<!ELEMENT GBStrucComment (
+        GBStrucComment_name?, 
+        GBStrucComment_items)>
+
+<!ELEMENT GBStrucComment_name (#PCDATA)>
+
+<!ELEMENT GBStrucComment_items (GBStrucCommentItem*)>
+
+
+<!ELEMENT GBStrucCommentItem (
+        GBStrucCommentItem_tag?, 
+        GBStrucCommentItem_value?, 
+        GBStrucCommentItem_url?)>
+
+<!ELEMENT GBStrucCommentItem_tag (#PCDATA)>
+
+<!ELEMENT GBStrucCommentItem_value (#PCDATA)>
+
+<!ELEMENT GBStrucCommentItem_url (#PCDATA)>
+
+
+<!ELEMENT GBFeatureSet (
+        GBFeatureSet_annot-source?, 
+        GBFeatureSet_features)>
+
+<!ELEMENT GBFeatureSet_annot-source (#PCDATA)>
+
+<!ELEMENT GBFeatureSet_features (GBFeature*)>
+
+
+<!ELEMENT GBFeature (
+        GBFeature_key, 
+        GBFeature_location, 
+        GBFeature_intervals?, 
+        GBFeature_operator?, 
+        GBFeature_partial5?, 
+        GBFeature_partial3?, 
+        GBFeature_quals?, 
+        GBFeature_xrefs?)>
+
+<!ELEMENT GBFeature_key (#PCDATA)>
+
+<!ELEMENT GBFeature_location (#PCDATA)>
+
+<!ELEMENT GBFeature_intervals (GBInterval*)>
+
+<!ELEMENT GBFeature_operator (#PCDATA)>
+
+<!ELEMENT GBFeature_partial5 EMPTY>
+<!ATTLIST GBFeature_partial5 value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT GBFeature_partial3 EMPTY>
+<!ATTLIST GBFeature_partial3 value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT GBFeature_quals (GBQualifier*)>
+
+<!ELEMENT GBFeature_xrefs (GBXref*)>
+
+
+<!ELEMENT GBInterval (
+        GBInterval_from?, 
+        GBInterval_to?, 
+        GBInterval_point?, 
+        GBInterval_iscomp?, 
+        GBInterval_interbp?, 
+        GBInterval_accession)>
+
+<!ELEMENT GBInterval_from (%INTEGER;)>
+
+<!ELEMENT GBInterval_to (%INTEGER;)>
+
+<!ELEMENT GBInterval_point (%INTEGER;)>
+
+<!ELEMENT GBInterval_iscomp EMPTY>
+<!ATTLIST GBInterval_iscomp value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT GBInterval_interbp EMPTY>
+<!ATTLIST GBInterval_interbp value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT GBInterval_accession (#PCDATA)>
+
+
+<!ELEMENT GBQualifier (
+        GBQualifier_name, 
+        GBQualifier_value?)>
+
+<!ELEMENT GBQualifier_name (#PCDATA)>
+
+<!ELEMENT GBQualifier_value (#PCDATA)>
+
+
+<!ELEMENT GBAltSeqData (
+        GBAltSeqData_name, 
+        GBAltSeqData_items?)>
+
+<!-- e.g., contig, wgs, scaffold, cage, genome -->
+<!ELEMENT GBAltSeqData_name (#PCDATA)>
+
+<!ELEMENT GBAltSeqData_items (GBAltSeqItem*)>
+
+
+<!ELEMENT GBAltSeqItem (
+        GBAltSeqItem_interval?, 
+        GBAltSeqItem_isgap?, 
+        GBAltSeqItem_gap-length?, 
+        GBAltSeqItem_gap-type?, 
+        GBAltSeqItem_gap-linkage?, 
+        GBAltSeqItem_gap-comment?, 
+        GBAltSeqItem_first-accn?, 
+        GBAltSeqItem_last-accn?, 
+        GBAltSeqItem_value?)>
+
+<!ELEMENT GBAltSeqItem_interval (GBInterval)>
+
+<!ELEMENT GBAltSeqItem_isgap EMPTY>
+<!ATTLIST GBAltSeqItem_isgap value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT GBAltSeqItem_gap-length (%INTEGER;)>
+
+<!ELEMENT GBAltSeqItem_gap-type (#PCDATA)>
+
+<!ELEMENT GBAltSeqItem_gap-linkage (#PCDATA)>
+
+<!ELEMENT GBAltSeqItem_gap-comment (#PCDATA)>
+
+<!ELEMENT GBAltSeqItem_first-accn (#PCDATA)>
+
+<!ELEMENT GBAltSeqItem_last-accn (#PCDATA)>
+
+<!ELEMENT GBAltSeqItem_value (#PCDATA)>
+
diff --git a/dtd/NCBI_Gene.dtd b/dtd/NCBI_Gene.dtd
new file mode 100644
index 0000000..cd6d122
--- /dev/null
+++ b/dtd/NCBI_Gene.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Gene.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
diff --git a/dtd/NCBI_Gene.mod.dtd b/dtd/NCBI_Gene.mod.dtd
new file mode 100644
index 0000000..be703af
--- /dev/null
+++ b/dtd/NCBI_Gene.mod.dtd
@@ -0,0 +1,97 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 10/09/2008 23:08:21
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Gene"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  NCBI Genes
+  by James Ostell, 1990
+  version 0.8
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Gene-ref,
+          Gene-nomenclature -->
+
+<!-- Elements referenced from other modules:
+          Dbtag FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+*** Gene ***********************************************
+*
+*  reference to a gene
+*
+-->
+<!ELEMENT Gene-ref (
+        Gene-ref_locus?, 
+        Gene-ref_allele?, 
+        Gene-ref_desc?, 
+        Gene-ref_maploc?, 
+        Gene-ref_pseudo?, 
+        Gene-ref_db?, 
+        Gene-ref_syn?, 
+        Gene-ref_locus-tag?, 
+        Gene-ref_formal-name?)>
+
+<!-- Official gene symbol -->
+<!ELEMENT Gene-ref_locus (#PCDATA)>
+
+<!-- Official allele designation -->
+<!ELEMENT Gene-ref_allele (#PCDATA)>
+
+<!-- descriptive name -->
+<!ELEMENT Gene-ref_desc (#PCDATA)>
+
+<!-- descriptive map location -->
+<!ELEMENT Gene-ref_maploc (#PCDATA)>
+
+<!-- pseudogene -->
+<!ELEMENT Gene-ref_pseudo EMPTY>
+<!ATTLIST Gene-ref_pseudo value ( true | false ) "false" >
+
+
+<!-- ids in other dbases -->
+<!ELEMENT Gene-ref_db (Dbtag*)>
+
+<!-- synonyms for locus -->
+<!ELEMENT Gene-ref_syn (Gene-ref_syn_E*)>
+
+
+<!ELEMENT Gene-ref_syn_E (#PCDATA)>
+
+<!-- systematic gene name (e.g., MI0001, ORF0069) -->
+<!ELEMENT Gene-ref_locus-tag (#PCDATA)>
+
+<!ELEMENT Gene-ref_formal-name (Gene-nomenclature)>
+
+
+<!ELEMENT Gene-nomenclature (
+        Gene-nomenclature_status, 
+        Gene-nomenclature_symbol?, 
+        Gene-nomenclature_name?, 
+        Gene-nomenclature_source?)>
+
+<!ELEMENT Gene-nomenclature_status %ENUM;>
+<!ATTLIST Gene-nomenclature_status value (
+        unknown |
+        official |
+        interim
+        ) #REQUIRED >
+
+
+<!ELEMENT Gene-nomenclature_symbol (#PCDATA)>
+
+<!ELEMENT Gene-nomenclature_name (#PCDATA)>
+
+<!ELEMENT Gene-nomenclature_source (Dbtag)>
+
diff --git a/dtd/NCBI_General.dtd b/dtd/NCBI_General.dtd
new file mode 100644
index 0000000..a8bb6c1
--- /dev/null
+++ b/dtd/NCBI_General.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "general.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
diff --git a/dtd/NCBI_General.mod.dtd b/dtd/NCBI_General.mod.dtd
new file mode 100644
index 0000000..c573ca5
--- /dev/null
+++ b/dtd/NCBI_General.mod.dtd
@@ -0,0 +1,333 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "general.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-General"
+================================================= -->
+
+<!--
+$Revision: 98896 $
+**********************************************************************
+
+  NCBI General Data elements
+  by James Ostell, 1990
+  Version 3.0 - June 1994
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Date,
+          Person-id,
+          Object-id,
+          Dbtag,
+          Int-fuzz,
+          User-object,
+          User-field -->
+<!-- ============================================ -->
+
+<!--
+ StringStore is really a VisibleString.  It is used to define very
+   long strings which may need to be stored by the receiving program
+   in special structures, such as a ByteStore, but it's just a hint.
+   AsnTool stores StringStores in ByteStore structures.
+ OCTET STRINGs are also stored in ByteStores by AsnTool
+ 
+ typedef struct bsunit {             /* for building multiline strings 
+ Nlm_Handle str;            /* the string piece 
+ Nlm_Int2 len_avail,
+ len;
+ struct bsunit PNTR next; }       /* the next one 
+ Nlm_BSUnit, PNTR Nlm_BSUnitPtr;
+ 
+ typedef struct bytestore {
+ Nlm_Int4 seekptr,       /* current position 
+ totlen,             /* total stored data length in bytes 
+ chain_offset;       /* offset in ByteStore of first byte in curchain 
+ Nlm_BSUnitPtr chain,       /* chain of elements 
+ curchain;           /* the BSUnit containing seekptr 
+ } Nlm_ByteStore, PNTR Nlm_ByteStorePtr;
+
+ AsnTool incorporates this as a primitive type, so the definition
+   is here just for completeness
+ 
+  StringStore ::= [APPLICATION 1] IMPLICIT OCTET STRING
+
+ BigInt is really an INTEGER. It is used to warn the receiving code to expect
+   a value bigger than Int4 (actually Int8). It will be stored in DataVal.bigintvalue
+
+   Like StringStore, AsnTool incorporates it as a primitive. The definition would be:
+   BigInt ::= [APPLICATION 2] IMPLICIT INTEGER
+
+ Date is used to replace the (overly complex) UTCTtime, GeneralizedTime
+  of ASN.1
+  It stores only a date
+
+-->
+<!ELEMENT Date (
+        Date_str | 
+        Date_std)>
+
+<!-- for those unparsed dates -->
+<!ELEMENT Date_str (#PCDATA)>
+
+<!-- use this if you can -->
+<!ELEMENT Date_std (Date-std)>
+
+<!-- NOTE: this is NOT a unix tm struct -->
+<!ELEMENT Date-std (
+        Date-std_year, 
+        Date-std_month?, 
+        Date-std_day?, 
+        Date-std_season?, 
+        Date-std_hour?, 
+        Date-std_minute?, 
+        Date-std_second?)>
+
+<!-- full year (including 1900) -->
+<!ELEMENT Date-std_year (%INTEGER;)>
+
+<!-- month (1-12) -->
+<!ELEMENT Date-std_month (%INTEGER;)>
+
+<!-- day of month (1-31) -->
+<!ELEMENT Date-std_day (%INTEGER;)>
+
+<!-- for "spring", "may-june", etc -->
+<!ELEMENT Date-std_season (#PCDATA)>
+
+<!-- hour of day (0-23) -->
+<!ELEMENT Date-std_hour (%INTEGER;)>
+
+<!-- minute of hour (0-59) -->
+<!ELEMENT Date-std_minute (%INTEGER;)>
+
+<!-- second of minute (0-59) -->
+<!ELEMENT Date-std_second (%INTEGER;)>
+
+<!--
+ Dbtag is generalized for tagging
+ eg. { "Social Security", str "023-79-8841" }
+ or  { "member", id 8882224 }
+-->
+<!ELEMENT Dbtag (
+        Dbtag_db, 
+        Dbtag_tag)>
+
+<!-- name of database or system -->
+<!ELEMENT Dbtag_db (#PCDATA)>
+
+<!-- appropriate tag -->
+<!ELEMENT Dbtag_tag (Object-id)>
+
+<!--
+ Object-id can tag or name anything
+
+-->
+<!ELEMENT Object-id (
+        Object-id_id | 
+        Object-id_str)>
+
+<!ELEMENT Object-id_id (%INTEGER;)>
+
+<!ELEMENT Object-id_str (#PCDATA)>
+
+<!--
+ Person-id is to define a std element for people
+
+-->
+<!ELEMENT Person-id (
+        Person-id_dbtag | 
+        Person-id_name | 
+        Person-id_ml | 
+        Person-id_str | 
+        Person-id_consortium)>
+
+<!-- any defined database tag -->
+<!ELEMENT Person-id_dbtag (Dbtag)>
+
+<!-- structured name -->
+<!ELEMENT Person-id_name (Name-std)>
+
+<!--
+ MEDLINE name (semi-structured)
+    eg. "Jones RM"
+-->
+<!ELEMENT Person-id_ml (#PCDATA)>
+
+<!-- unstructured name -->
+<!ELEMENT Person-id_str (#PCDATA)>
+
+<!-- consortium name -->
+<!ELEMENT Person-id_consortium (#PCDATA)>
+
+<!-- Structured names -->
+<!ELEMENT Name-std (
+        Name-std_last, 
+        Name-std_first?, 
+        Name-std_middle?, 
+        Name-std_full?, 
+        Name-std_initials?, 
+        Name-std_suffix?, 
+        Name-std_title?)>
+
+<!ELEMENT Name-std_last (#PCDATA)>
+
+<!ELEMENT Name-std_first (#PCDATA)>
+
+<!ELEMENT Name-std_middle (#PCDATA)>
+
+<!-- full name eg. "J. John Smith, Esq" -->
+<!ELEMENT Name-std_full (#PCDATA)>
+
+<!-- first + middle initials -->
+<!ELEMENT Name-std_initials (#PCDATA)>
+
+<!-- Jr, Sr, III -->
+<!ELEMENT Name-std_suffix (#PCDATA)>
+
+<!-- Dr., Sister, etc -->
+<!ELEMENT Name-std_title (#PCDATA)>
+
+<!--
+**** Int-fuzz **********************************************
+*
+*   uncertainties in integer values
+-->
+<!ELEMENT Int-fuzz (
+        Int-fuzz_p-m | 
+        Int-fuzz_range | 
+        Int-fuzz_pct | 
+        Int-fuzz_lim | 
+        Int-fuzz_alt)>
+
+<!-- plus or minus fixed amount -->
+<!ELEMENT Int-fuzz_p-m (%INTEGER;)>
+<!-- max to min -->
+<!ELEMENT Int-fuzz_range (
+        Int-fuzz_range_max, 
+        Int-fuzz_range_min)>
+
+<!ELEMENT Int-fuzz_range_max (%INTEGER;)>
+
+<!ELEMENT Int-fuzz_range_min (%INTEGER;)>
+
+<!-- % plus or minus (x10) 0-1000 -->
+<!ELEMENT Int-fuzz_pct (%INTEGER;)>
+<!-- some limit value -->
+<!ELEMENT Int-fuzz_lim %ENUM;>
+
+<!--
+    unk	-  unknown
+    gt	-  greater than
+    lt	-  less than
+    tr	-  space to right of position
+    tl	-  space to left of position
+    circle	-  artificial break at origin of circle
+    other	-  something else
+-->
+<!ATTLIST Int-fuzz_lim value (
+        unk |
+        gt |
+        lt |
+        tr |
+        tl |
+        circle |
+        other
+        ) #REQUIRED >
+
+
+<!-- set of alternatives for the integer -->
+<!ELEMENT Int-fuzz_alt (Int-fuzz_alt_E*)>
+
+
+<!ELEMENT Int-fuzz_alt_E (%INTEGER;)>
+
+<!--
+**** User-object **********************************************
+*
+*   a general object for a user defined structured data item
+*    used by Seq-feat and Seq-descr
+-->
+<!ELEMENT User-object (
+        User-object_class?, 
+        User-object_type, 
+        User-object_data)>
+
+<!-- endeavor which designed this object -->
+<!ELEMENT User-object_class (#PCDATA)>
+
+<!-- type of object within class -->
+<!ELEMENT User-object_type (Object-id)>
+
+<!-- the object itself -->
+<!ELEMENT User-object_data (User-field*)>
+
+
+<!ELEMENT User-field (
+        User-field_label, 
+        User-field_num?, 
+        User-field_data)>
+
+<!-- field label -->
+<!ELEMENT User-field_label (Object-id)>
+
+<!-- required for strs, ints, reals, oss -->
+<!ELEMENT User-field_num (%INTEGER;)>
+<!-- field contents -->
+<!ELEMENT User-field_data (
+        User-field_data_str | 
+        User-field_data_int | 
+        User-field_data_real | 
+        User-field_data_bool | 
+        User-field_data_os | 
+        User-field_data_object | 
+        User-field_data_strs | 
+        User-field_data_ints | 
+        User-field_data_reals | 
+        User-field_data_oss | 
+        User-field_data_fields | 
+        User-field_data_objects)>
+
+<!ELEMENT User-field_data_str (#PCDATA)>
+
+<!ELEMENT User-field_data_int (%INTEGER;)>
+
+<!ELEMENT User-field_data_real (%REAL;)>
+
+<!ELEMENT User-field_data_bool EMPTY>
+<!ATTLIST User-field_data_bool value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT User-field_data_os (%OCTETS;)>
+
+<!-- for using other definitions -->
+<!ELEMENT User-field_data_object (User-object)>
+
+<!ELEMENT User-field_data_strs (User-field_data_strs_E*)>
+
+
+<!ELEMENT User-field_data_strs_E (#PCDATA)>
+
+<!ELEMENT User-field_data_ints (User-field_data_ints_E*)>
+
+
+<!ELEMENT User-field_data_ints_E (%INTEGER;)>
+
+<!ELEMENT User-field_data_reals (User-field_data_reals_E*)>
+
+
+<!ELEMENT User-field_data_reals_E (%REAL;)>
+
+<!ELEMENT User-field_data_oss (User-field_data_oss_E*)>
+
+
+<!ELEMENT User-field_data_oss_E (%OCTETS;)>
+
+<!ELEMENT User-field_data_fields (User-field*)>
+
+<!ELEMENT User-field_data_objects (User-object*)>
+
diff --git a/dtd/NCBI_ID1Access.dtd b/dtd/NCBI_ID1Access.dtd
new file mode 100644
index 0000000..8e57ced
--- /dev/null
+++ b/dtd/NCBI_ID1Access.dtd
@@ -0,0 +1,92 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "id1.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_ID1Access.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_ID1Access_module PUBLIC "-//NCBI//NCBI ID1Access Module//EN" "NCBI_ID1Access.mod.dtd">
+%NCBI_ID1Access_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_ID1Access.mod.dtd b/dtd/NCBI_ID1Access.mod.dtd
new file mode 100644
index 0000000..b489907
--- /dev/null
+++ b/dtd/NCBI_ID1Access.mod.dtd
@@ -0,0 +1,218 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "id1.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-ID1Access"
+================================================= -->
+
+<!--
+$Revision: 1.12 $
+********************************************************************
+
+  Network Id server network access
+  Yaschenko 1996
+
+
+*********************************************************************
+
+  ID1.asn
+
+     messages for id server network access
+
+*********************************************************************
+-->
+
+<!-- Elements referenced from other modules:
+          Seq-id FROM NCBI-Seqloc,
+          Seq-entry FROM NCBI-Seqset,
+          Seq-hist FROM NCBI-Sequence -->
+<!-- ============================================ -->
+
+<!--
+**********************************
+ requests
+
+-->
+<!ELEMENT ID1server-request (
+        ID1server-request_init | 
+        ID1server-request_getgi | 
+        ID1server-request_getsefromgi | 
+        ID1server-request_fini | 
+        ID1server-request_getseqidsfromgi | 
+        ID1server-request_getgihist | 
+        ID1server-request_getgirev | 
+        ID1server-request_getgistate | 
+        ID1server-request_getsewithinfo | 
+        ID1server-request_getblobinfo)>
+
+<!-- DlInit -->
+<!ELEMENT ID1server-request_init EMPTY>
+
+<!-- get a gi given a Seq-id -->
+<!ELEMENT ID1server-request_getgi (Seq-id)>
+
+<!-- given a gi, get the Seq-entry -->
+<!ELEMENT ID1server-request_getsefromgi (ID1server-maxcomplex)>
+
+<!-- DlFini -->
+<!ELEMENT ID1server-request_fini EMPTY>
+
+<!--get all Seq-ids of given gi -->
+<!ELEMENT ID1server-request_getseqidsfromgi (%INTEGER;)>
+
+<!--get an historical list of gis  -->
+<!ELEMENT ID1server-request_getgihist (%INTEGER;)>
+
+<!--get a revision history of gi -->
+<!ELEMENT ID1server-request_getgirev (%INTEGER;)>
+
+<!--get a state of gi -->
+<!ELEMENT ID1server-request_getgistate (%INTEGER;)>
+<!--  Complexity stuff will be for ID1 -->
+<!ELEMENT ID1server-request_getsewithinfo (ID1server-maxcomplex)>
+<!--  Complexity stuff will be for ID1 -->
+<!ELEMENT ID1server-request_getblobinfo (ID1server-maxcomplex)>
+
+<!--  Complexity stuff will be for ID1 -->
+<!ELEMENT ID1server-maxcomplex (
+        ID1server-maxcomplex_maxplex, 
+        ID1server-maxcomplex_gi, 
+        ID1server-maxcomplex_ent?, 
+        ID1server-maxcomplex_sat?)>
+
+<!ELEMENT ID1server-maxcomplex_maxplex (Entry-complexities)>
+
+<!ELEMENT ID1server-maxcomplex_gi (%INTEGER;)>
+
+<!-- needed when you want to retrieve a given ent -->
+<!ELEMENT ID1server-maxcomplex_ent (%INTEGER;)>
+
+<!-- satellite 0-id,1-dbEST -->
+<!ELEMENT ID1server-maxcomplex_sat (#PCDATA)>
+
+
+<!ELEMENT Entry-complexities (%INTEGER;)>
+
+<!--
+    entry	-  the "natural" entry for this (nuc-prot) 
+    bioseq	-  only the bioseq identified
+    bioseq-set	-  any seg-set it may be part of
+    nuc-prot	-  any nuc-prot it may be part of
+-->
+<!ATTLIST Entry-complexities value (
+        entry |
+        bioseq |
+        bioseq-set |
+        nuc-prot |
+        pub-set
+        ) #IMPLIED >
+
+
+
+<!ELEMENT ID1Seq-hist (
+        ID1Seq-hist_hist)>
+
+<!ELEMENT ID1Seq-hist_hist (Seq-hist)>
+
+
+<!ELEMENT ID1server-back (
+        ID1server-back_init | 
+        ID1server-back_error | 
+        ID1server-back_gotgi | 
+        ID1server-back_gotseqentry | 
+        ID1server-back_gotdeadseqentry | 
+        ID1server-back_fini | 
+        ID1server-back_gistate | 
+        ID1server-back_ids | 
+        ID1server-back_gihist | 
+        ID1server-back_girevhist | 
+        ID1server-back_gotsewithinfo | 
+        ID1server-back_gotblobinfo)>
+
+<!-- DlInit -->
+<!ELEMENT ID1server-back_init EMPTY>
+
+<!ELEMENT ID1server-back_error (%INTEGER;)>
+
+<!ELEMENT ID1server-back_gotgi (%INTEGER;)>
+
+<!-- live -->
+<!ELEMENT ID1server-back_gotseqentry (Seq-entry)>
+
+<!-- dead -->
+<!ELEMENT ID1server-back_gotdeadseqentry (Seq-entry)>
+
+<!-- DlFini -->
+<!ELEMENT ID1server-back_fini EMPTY>
+
+<!ELEMENT ID1server-back_gistate (%INTEGER;)>
+
+<!ELEMENT ID1server-back_ids (Seq-id*)>
+
+<!--
+ because hand crafted Seq-hist does not follow 
+ same conventions 
+-->
+<!ELEMENT ID1server-back_gihist (ID1Seq-hist*)>
+
+<!ELEMENT ID1server-back_girevhist (ID1Seq-hist*)>
+
+<!ELEMENT ID1server-back_gotsewithinfo (ID1SeqEntry-info)>
+
+<!ELEMENT ID1server-back_gotblobinfo (ID1blob-info)>
+
+
+<!ELEMENT ID1server-debug (ID1server-back*)>
+
+
+<!ELEMENT ID1blob-info (
+        ID1blob-info_gi, 
+        ID1blob-info_sat, 
+        ID1blob-info_sat-key, 
+        ID1blob-info_satname, 
+        ID1blob-info_suppress, 
+        ID1blob-info_withdrawn, 
+        ID1blob-info_confidential, 
+        ID1blob-info_blob-state, 
+        ID1blob-info_comment?, 
+        ID1blob-info_extfeatmask?)>
+
+<!ELEMENT ID1blob-info_gi (%INTEGER;)>
+
+<!ELEMENT ID1blob-info_sat (%INTEGER;)>
+
+<!ELEMENT ID1blob-info_sat-key (%INTEGER;)>
+
+<!ELEMENT ID1blob-info_satname (#PCDATA)>
+
+<!ELEMENT ID1blob-info_suppress (%INTEGER;)>
+
+<!ELEMENT ID1blob-info_withdrawn (%INTEGER;)>
+
+<!ELEMENT ID1blob-info_confidential (%INTEGER;)>
+
+<!--
+ blob-state now contains blob version info.
+ it's actually minutes from 01/01/1970
+ and it's negative if blob is dead.
+-->
+<!ELEMENT ID1blob-info_blob-state (%INTEGER;)>
+
+<!-- public comment for withdrawn record  -->
+<!ELEMENT ID1blob-info_comment (#PCDATA)>
+
+<!-- mask for external features (SNP,...) -->
+<!ELEMENT ID1blob-info_extfeatmask (%INTEGER;)>
+
+
+<!ELEMENT ID1SeqEntry-info (
+        ID1SeqEntry-info_blob-info, 
+        ID1SeqEntry-info_blob?)>
+
+<!ELEMENT ID1SeqEntry-info_blob-info (ID1blob-info)>
+
+<!ELEMENT ID1SeqEntry-info_blob (Seq-entry)>
+
diff --git a/dtd/NCBI_ID2Access.dtd b/dtd/NCBI_ID2Access.dtd
new file mode 100644
index 0000000..4adbfa5
--- /dev/null
+++ b/dtd/NCBI_ID2Access.dtd
@@ -0,0 +1,95 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "id2.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_ID2Access.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_ID2Access_module PUBLIC "-//NCBI//NCBI ID2Access Module//EN" "NCBI_ID2Access.mod.dtd">
+%NCBI_ID2Access_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_Seq_split_module PUBLIC "-//NCBI//NCBI Seq split Module//EN" "NCBI_Seq_split.mod.dtd">
+%NCBI_Seq_split_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_ID2Access.mod.dtd b/dtd/NCBI_ID2Access.mod.dtd
new file mode 100644
index 0000000..5d5ecf7
--- /dev/null
+++ b/dtd/NCBI_ID2Access.mod.dtd
@@ -0,0 +1,759 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "id2.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-ID2Access"
+================================================= -->
+
+<!--
+$Revision: 196770 $
+********************************************************************
+
+  Network Id server network access
+  Vasilchenko 2003
+
+
+*********************************************************************
+
+  ID2.asn
+
+     messages for id server network access
+
+*********************************************************************
+-->
+
+<!-- Elements referenced from other modules:
+          Seq-id,
+          Seq-loc FROM NCBI-Seqloc,
+          ID2S-Chunk-Id,
+          ID2S-Seq-annot-Info FROM NCBI-Seq-split -->
+<!-- ============================================ -->
+
+<!--
+*********************************************************************
+ request types
+*********************************************************************
+ Requests are sent in packets to allow sending several requests at once
+ to avoid network latency, without possiblity of deadlock with server.
+ Server will not start sending replies until it will read the whole packet.
+-->
+<!ELEMENT ID2-Request-Packet (ID2-Request*)>
+
+
+<!ELEMENT ID2-Request (
+        ID2-Request_serial-number?, 
+        ID2-Request_params?, 
+        ID2-Request_request)>
+
+<!--
+ request's serial number, can be used in asynchronic clients
+ server should copy it to corresponding field in reply
+-->
+<!ELEMENT ID2-Request_serial-number (%INTEGER;)>
+
+<!ELEMENT ID2-Request_params (ID2-Params)>
+
+<!ELEMENT ID2-Request_request (
+        ID2-Request_request_init | 
+        ID2-Request_request_get-packages | 
+        ID2-Request_request_get-seq-id | 
+        ID2-Request_request_get-blob-id | 
+        ID2-Request_request_get-blob-info | 
+        ID2-Request_request_reget-blob | 
+        ID2-Request_request_get-chunks)>
+
+<!ELEMENT ID2-Request_request_init EMPTY>
+<!--
+ Request for set of params packages know by server.
+ Packages can be used to abbreviate parameters of request.
+-->
+<!ELEMENT ID2-Request_request_get-packages (ID2-Request-Get-Packages)>
+<!--
+ Requested sequence ID, can be any string or Seq-id.
+ This request will be replied with one or more ID2-Reply-Get-Seq-id.
+-->
+<!ELEMENT ID2-Request_request_get-seq-id (ID2-Request-Get-Seq-id)>
+<!--
+ Return blob-id with specified seq-id.
+ This request with be replied with one or more ID2-Reply-Get-Blob-Id.
+-->
+<!ELEMENT ID2-Request_request_get-blob-id (ID2-Request-Get-Blob-Id)>
+<!--
+ Return some information related to the blob.
+ This request with be replied with one or more of:
+   ID2-Reply-Get-Blob-Seq-ids - if requested by get-seq-ids field
+   ID2-Reply-Get-Blob         - if requested by get-data field
+   ID2S-Reply-Get-Split-Info
+   ID2S-Reply-Get-Chunk
+ Last two can be sent in addition to ID2-Reply-Get-Blob
+ if the blob is split on the server.
+ The replies are made separate to allow server to create replies easier
+ from precalculated data. Each of these replies have ID2-Reply-Data field.
+-->
+<!ELEMENT ID2-Request_request_get-blob-info (ID2-Request-Get-Blob-Info)>
+<!--
+ This is similar to FTP reget command.
+ It may be unsupported by server.
+ It's defined only for plain blobs (returned in ID2-Reply-Get-Blob)
+ as all split data comes in small chunks, so reget doesn't make sense.
+-->
+<!ELEMENT ID2-Request_request_reget-blob (ID2-Request-ReGet-Blob)>
+<!--
+ Request for specific chunks.
+ Server will reply with one or more ID2S-Reply-Get-Chunk.
+-->
+<!ELEMENT ID2-Request_request_get-chunks (ID2S-Request-Get-Chunks)>
+
+<!--
+ Request for set of params packages know by server.
+ Packages can be used to abbreviate parameters of request.
+-->
+<!ELEMENT ID2-Request-Get-Packages (
+        ID2-Request-Get-Packages_names?, 
+        ID2-Request-Get-Packages_no-contents?)>
+
+<!--
+ return known packages from this list
+ if unset - return all known packages
+-->
+<!ELEMENT ID2-Request-Get-Packages_names (ID2-Request-Get-Packages_names_E*)>
+
+
+<!ELEMENT ID2-Request-Get-Packages_names_E (#PCDATA)>
+
+<!-- return packages' names only -->
+<!ELEMENT ID2-Request-Get-Packages_no-contents EMPTY>
+
+<!--
+ Requested sequence ID, can be any string or Seq-id.
+ This request will be replied with one or more ID2-Reply-Get-Seq-id.
+-->
+<!ELEMENT ID2-Request-Get-Seq-id (
+        ID2-Request-Get-Seq-id_seq-id, 
+        ID2-Request-Get-Seq-id_seq-id-type?)>
+
+<!ELEMENT ID2-Request-Get-Seq-id_seq-id (ID2-Seq-id)>
+
+<!ELEMENT ID2-Request-Get-Seq-id_seq-id-type (%INTEGER;)>
+
+<!--
+    any	-  return any qualified Seq-id
+    gi	-  gi is preferred
+    text	-  text Seq-id (accession etc) is preferred
+    general	-  general Seq-id is preferred
+    all	-  return all qualified Seq-ids of the sequence
+    label	-  return a sequence string label as string
+         in general id with db "LABEL"
+    taxid	-  return a sequence taxonomy ID as integer
+         in general id with db "TAXID"
+-->
+<!ATTLIST ID2-Request-Get-Seq-id_seq-id-type value (
+        any |
+        gi |
+        text |
+        general |
+        all |
+        label |
+        taxid
+        ) #IMPLIED >
+
+
+
+<!ELEMENT ID2-Seq-id (
+        ID2-Seq-id_string | 
+        ID2-Seq-id_seq-id)>
+
+<!ELEMENT ID2-Seq-id_string (#PCDATA)>
+
+<!ELEMENT ID2-Seq-id_seq-id (Seq-id)>
+
+<!--
+ Return blob-id with specified seq-id.
+ This request with be replied with one or more ID2-Reply-Get-Blob-Id.
+-->
+<!ELEMENT ID2-Request-Get-Blob-Id (
+        ID2-Request-Get-Blob-Id_seq-id, 
+        ID2-Request-Get-Blob-Id_sources?, 
+        ID2-Request-Get-Blob-Id_external?)>
+
+<!-- id can be supplied by inner request -->
+<!ELEMENT ID2-Request-Get-Blob-Id_seq-id (ID2-Request-Get-Seq-id)>
+
+<!-- return id of blob with sequence -->
+<!ELEMENT ID2-Request-Get-Blob-Id_sources (ID2-Request-Get-Blob-Id_sources_E*)>
+
+
+<!ELEMENT ID2-Request-Get-Blob-Id_sources_E (#PCDATA)>
+
+<!-- return Blob-Ids with external features on this Seq-id -->
+<!ELEMENT ID2-Request-Get-Blob-Id_external EMPTY>
+
+<!--
+ Return some information related to the blob.
+ This request with be replied with one or more of:
+   ID2-Reply-Get-Blob-Seq-ids - if requested by get-seq-ids field
+   ID2-Reply-Get-Blob         - if requested by get-data field
+   ID2S-Reply-Get-Split-Info
+   ID2S-Reply-Get-Chunk
+ Last two can be sent in addition to ID2-Reply-Get-Blob
+ if the blob is split on the server.
+ The replies are made separate to allow server to create replies easier
+ from precalculated data. Each of these replies have ID2-Reply-Data field.
+-->
+<!ELEMENT ID2-Request-Get-Blob-Info (
+        ID2-Request-Get-Blob-Info_blob-id, 
+        ID2-Request-Get-Blob-Info_get-seq-ids?, 
+        ID2-Request-Get-Blob-Info_get-data?)>
+<!-- id can be supplied by inner request -->
+<!ELEMENT ID2-Request-Get-Blob-Info_blob-id (
+        ID2-Request-Get-Blob-Info_blob-id_blob-id | 
+        ID2-Request-Get-Blob-Info_blob-id_resolve)>
+
+<!-- id can be supplied by inner request -->
+<!ELEMENT ID2-Request-Get-Blob-Info_blob-id_blob-id (ID2-Blob-Id)>
+<!-- generate blob-ids from request -->
+<!ELEMENT ID2-Request-Get-Blob-Info_blob-id_resolve (
+        ID2-Request-Get-Blob-Info_blob-id_resolve_request, 
+        ID2-Request-Get-Blob-Info_blob-id_resolve_exclude-blobs?)>
+<!--
+ Return blob-id with specified seq-id.
+ This request with be replied with one or more ID2-Reply-Get-Blob-Id.
+-->
+<!ELEMENT ID2-Request-Get-Blob-Info_blob-id_resolve_request (ID2-Request-Get-Blob-Id)>
+
+<!-- server will not send blobs listed here -->
+<!ELEMENT ID2-Request-Get-Blob-Info_blob-id_resolve_exclude-blobs (ID2-Blob-Id*)>
+
+<!-- return in addition list of Seq-ids also resolving to this blob -->
+<!ELEMENT ID2-Request-Get-Blob-Info_get-seq-ids EMPTY>
+
+<!--
+ level of details requested immediately
+ server will send relevant chunks if blob is splitted
+-->
+<!ELEMENT ID2-Request-Get-Blob-Info_get-data (ID2-Get-Blob-Details)>
+
+<!--
+ This is similar to FTP reget command.
+ It may be unsupported by server.
+ It's defined only for plain blobs (returned in ID2-Reply-Get-Blob)
+ as all split data comes in small chunks, so reget doesn't make sense.
+-->
+<!ELEMENT ID2-Request-ReGet-Blob (
+        ID2-Request-ReGet-Blob_blob-id, 
+        ID2-Request-ReGet-Blob_split-version, 
+        ID2-Request-ReGet-Blob_offset)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2-Request-ReGet-Blob_blob-id (ID2-Blob-Id)>
+
+<!-- blob split version to resend -->
+<!ELEMENT ID2-Request-ReGet-Blob_split-version (%INTEGER;)>
+
+<!-- start offset of data to get -->
+<!ELEMENT ID2-Request-ReGet-Blob_offset (%INTEGER;)>
+
+<!--
+ Request for specific chunks.
+ Server will reply with one or more ID2S-Reply-Get-Chunk.
+-->
+<!ELEMENT ID2S-Request-Get-Chunks (
+        ID2S-Request-Get-Chunks_blob-id, 
+        ID2S-Request-Get-Chunks_chunks, 
+        ID2S-Request-Get-Chunks_split-version?)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2S-Request-Get-Chunks_blob-id (ID2-Blob-Id)>
+
+<!-- requests for specific chunks of splitted blob -->
+<!ELEMENT ID2S-Request-Get-Chunks_chunks (ID2S-Chunk-Id*)>
+
+<!-- blob split version -->
+<!ELEMENT ID2S-Request-Get-Chunks_split-version (%INTEGER;)>
+
+<!--
+ The following structure describes what parts of blob are required
+ immediately after ID2-Request-Get-Blob-Info in case blob is split.
+ Seq-entry level will have probably the same values as Entry-complexities.
+-->
+<!ELEMENT ID2-Get-Blob-Details (
+        ID2-Get-Blob-Details_location?, 
+        ID2-Get-Blob-Details_seq-class-level?, 
+        ID2-Get-Blob-Details_descr-level?, 
+        ID2-Get-Blob-Details_descr-type-mask?, 
+        ID2-Get-Blob-Details_annot-type-mask?, 
+        ID2-Get-Blob-Details_feat-type-mask?, 
+        ID2-Get-Blob-Details_sequence-level?)>
+
+<!-- reference location for details - can be only part of sequence -->
+<!ELEMENT ID2-Get-Blob-Details_location (Seq-loc)>
+
+<!-- Seq-entry level for all data except descriptors (sequnence, annots) -->
+<!ELEMENT ID2-Get-Blob-Details_seq-class-level (%INTEGER;)>
+
+<!-- Seq-entry level for descriptors -->
+<!ELEMENT ID2-Get-Blob-Details_descr-level (%INTEGER;)>
+
+<!-- mask of descriptor types - see Seqdesc for variants' values -->
+<!ELEMENT ID2-Get-Blob-Details_descr-type-mask (%INTEGER;)>
+
+<!-- mask of annotation types - see Seq-annot.data for values -->
+<!ELEMENT ID2-Get-Blob-Details_annot-type-mask (%INTEGER;)>
+
+<!-- mask of feature types - see SeqFeatData for values -->
+<!ELEMENT ID2-Get-Blob-Details_feat-type-mask (%INTEGER;)>
+<!-- level of sequence data to load -->
+<!ELEMENT ID2-Get-Blob-Details_sequence-level %ENUM;>
+
+<!--
+    none	-  not required
+    seq-map	-  at least seq-map
+    seq-data	-  include seq-data
+-->
+<!ATTLIST ID2-Get-Blob-Details_sequence-level value (
+        none |
+        seq-map |
+        seq-data
+        ) #REQUIRED >
+
+
+<!--
+*********************************************************************
+ reply types
+*********************************************************************
+-->
+<!ELEMENT ID2-Reply (
+        ID2-Reply_serial-number?, 
+        ID2-Reply_params?, 
+        ID2-Reply_error?, 
+        ID2-Reply_end-of-reply?, 
+        ID2-Reply_reply, 
+        ID2-Reply_discard?)>
+
+<!-- request's serial number, copy from request -->
+<!ELEMENT ID2-Reply_serial-number (%INTEGER;)>
+
+<!ELEMENT ID2-Reply_params (ID2-Params)>
+
+<!ELEMENT ID2-Reply_error (ID2-Error*)>
+
+<!--
+ true if this reply is the last one for the request
+ false if more replies will follow
+-->
+<!ELEMENT ID2-Reply_end-of-reply EMPTY>
+<!--
+ reply data moved at the end to make it easier to construct
+ the reply data manually from precalculated data
+-->
+<!ELEMENT ID2-Reply_reply (
+        ID2-Reply_reply_init | 
+        ID2-Reply_reply_empty | 
+        ID2-Reply_reply_get-package | 
+        ID2-Reply_reply_get-seq-id | 
+        ID2-Reply_reply_get-blob-id | 
+        ID2-Reply_reply_get-blob-seq-ids | 
+        ID2-Reply_reply_get-blob | 
+        ID2-Reply_reply_reget-blob | 
+        ID2-Reply_reply_get-split-info | 
+        ID2-Reply_reply_get-chunk)>
+
+<!ELEMENT ID2-Reply_reply_init EMPTY>
+
+<!ELEMENT ID2-Reply_reply_empty EMPTY>
+<!-- Reply to ID2-Request-Get-Packages. -->
+<!ELEMENT ID2-Reply_reply_get-package (ID2-Reply-Get-Package)>
+<!-- Reply to ID2-Request-Get-Seq-id. -->
+<!ELEMENT ID2-Reply_reply_get-seq-id (ID2-Reply-Get-Seq-id)>
+<!-- Reply to ID2-Request-Get-Blob-Id. -->
+<!ELEMENT ID2-Reply_reply_get-blob-id (ID2-Reply-Get-Blob-Id)>
+<!-- Reply to ID2-Request-Get-Blob-Info. -->
+<!ELEMENT ID2-Reply_reply_get-blob-seq-ids (ID2-Reply-Get-Blob-Seq-ids)>
+<!-- Reply to ID2-Request-Get-Blob-Info. -->
+<!ELEMENT ID2-Reply_reply_get-blob (ID2-Reply-Get-Blob)>
+<!-- Reply to ID2-Request-ReGet-Blob. -->
+<!ELEMENT ID2-Reply_reply_reget-blob (ID2-Reply-ReGet-Blob)>
+<!-- Reply to ID2-Request-Get-Blob-Info. -->
+<!ELEMENT ID2-Reply_reply_get-split-info (ID2S-Reply-Get-Split-Info)>
+<!-- Reply to ID2S-Request-Get-Chunks. -->
+<!ELEMENT ID2-Reply_reply_get-chunk (ID2S-Reply-Get-Chunk)>
+<!--
+ additional error flag if the reply is broken in the middle
+ of transfer.
+ 'last-octet-string', and 'nothing' mean that
+ client may use ReGet request to get the remaining data.
+-->
+<!ELEMENT ID2-Reply_discard %ENUM;>
+
+<!--
+    reply	-  whole reply should be discarded
+    last-octet-string	-  all data in embedded ID2-Reply-Data
+         except last OCTET STRING is correct
+    nothing	-  all data in embedded ID2-Reply-Data
+         is correct, but is incomplete
+-->
+<!ATTLIST ID2-Reply_discard value (
+        reply |
+        last-octet-string |
+        nothing
+        ) #REQUIRED >
+
+
+
+<!ELEMENT ID2-Error (
+        ID2-Error_severity, 
+        ID2-Error_retry-delay?, 
+        ID2-Error_message?)>
+
+<!ELEMENT ID2-Error_severity %ENUM;>
+
+<!--
+    warning	-  nothing harmful happened
+    failed-command	-  command cannot be completed this time
+    failed-connection	-  connection cannot be reused, reconnect is required
+    failed-server	-  server cannot be used for a while
+    no-data	-  resolve request gives no data
+         probably temporarily (see retry-delay field)
+    restricted-data	-  data exists but client doesn't have permission to get it
+    unsupported-command	-  this request type is not supported by server
+    invalid-arguments	-  error in request packet, cannot retry
+-->
+<!ATTLIST ID2-Error_severity value (
+        warning |
+        failed-command |
+        failed-connection |
+        failed-server |
+        no-data |
+        restricted-data |
+        unsupported-command |
+        invalid-arguments
+        ) #REQUIRED >
+
+
+<!-- client may retry the request after specified time in seconds  -->
+<!ELEMENT ID2-Error_retry-delay (%INTEGER;)>
+
+<!ELEMENT ID2-Error_message (#PCDATA)>
+
+<!-- Reply to ID2-Request-Get-Packages. -->
+<!ELEMENT ID2-Reply-Get-Package (
+        ID2-Reply-Get-Package_name, 
+        ID2-Reply-Get-Package_params?)>
+
+<!ELEMENT ID2-Reply-Get-Package_name (#PCDATA)>
+
+<!ELEMENT ID2-Reply-Get-Package_params (ID2-Params)>
+
+<!-- Reply to ID2-Request-Get-Seq-id. -->
+<!ELEMENT ID2-Reply-Get-Seq-id (
+        ID2-Reply-Get-Seq-id_request, 
+        ID2-Reply-Get-Seq-id_seq-id?, 
+        ID2-Reply-Get-Seq-id_end-of-reply?)>
+
+<!-- copy of request -->
+<!ELEMENT ID2-Reply-Get-Seq-id_request (ID2-Request-Get-Seq-id)>
+
+<!--
+ resolved Seq-id
+ not set if error occurred
+-->
+<!ELEMENT ID2-Reply-Get-Seq-id_seq-id (Seq-id*)>
+
+<!-- this Seq-id is the last one in the request -->
+<!ELEMENT ID2-Reply-Get-Seq-id_end-of-reply EMPTY>
+
+
+<!ELEMENT ID2-Blob-State %ENUM;>
+<!ATTLIST ID2-Blob-State value (
+        live |
+        suppressed-temp |
+        suppressed |
+        dead |
+        protected |
+        withdrawn
+        ) #REQUIRED >
+
+
+<!-- Reply to ID2-Request-Get-Blob-Id. -->
+<!ELEMENT ID2-Reply-Get-Blob-Id (
+        ID2-Reply-Get-Blob-Id_seq-id, 
+        ID2-Reply-Get-Blob-Id_blob-id?, 
+        ID2-Reply-Get-Blob-Id_split-version?, 
+        ID2-Reply-Get-Blob-Id_annot-info?, 
+        ID2-Reply-Get-Blob-Id_end-of-reply?, 
+        ID2-Reply-Get-Blob-Id_blob-state?)>
+
+<!-- requested Seq-id -->
+<!ELEMENT ID2-Reply-Get-Blob-Id_seq-id (Seq-id)>
+
+<!-- result -->
+<!ELEMENT ID2-Reply-Get-Blob-Id_blob-id (ID2-Blob-Id)>
+
+<!--
+ version of split data
+ (0 for non split)
+-->
+<!ELEMENT ID2-Reply-Get-Blob-Id_split-version (%INTEGER;)>
+
+<!--
+ annotation types in this blob
+ annotation are unknown if this field is omitted
+-->
+<!ELEMENT ID2-Reply-Get-Blob-Id_annot-info (ID2S-Seq-annot-Info*)>
+
+<!-- this Blob-id is the last one in the request -->
+<!ELEMENT ID2-Reply-Get-Blob-Id_end-of-reply EMPTY>
+
+<!-- state of the blob, 0 or missing means regular live data -->
+<!ELEMENT ID2-Reply-Get-Blob-Id_blob-state (%INTEGER;)>
+
+<!-- Reply to ID2-Request-Get-Blob-Info. -->
+<!ELEMENT ID2-Reply-Get-Blob-Seq-ids (
+        ID2-Reply-Get-Blob-Seq-ids_blob-id, 
+        ID2-Reply-Get-Blob-Seq-ids_ids?)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2-Reply-Get-Blob-Seq-ids_blob-id (ID2-Blob-Id)>
+
+<!--
+ list of Seq-id resolving to this Blob-Id
+ in compressed format
+-->
+<!ELEMENT ID2-Reply-Get-Blob-Seq-ids_ids (ID2-Reply-Data)>
+
+<!-- Reply to ID2-Request-Get-Blob-Info. -->
+<!ELEMENT ID2-Reply-Get-Blob (
+        ID2-Reply-Get-Blob_blob-id, 
+        ID2-Reply-Get-Blob_split-version?, 
+        ID2-Reply-Get-Blob_data?)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2-Reply-Get-Blob_blob-id (ID2-Blob-Id)>
+
+<!--
+ version of split data
+ (0 for non split)
+-->
+<!ELEMENT ID2-Reply-Get-Blob_split-version (%INTEGER;)>
+
+<!--
+ whole blob or blob skeleton
+ not set if error occurred
+-->
+<!ELEMENT ID2-Reply-Get-Blob_data (ID2-Reply-Data)>
+
+<!-- Reply to ID2-Request-Get-Blob-Info. -->
+<!ELEMENT ID2S-Reply-Get-Split-Info (
+        ID2S-Reply-Get-Split-Info_blob-id, 
+        ID2S-Reply-Get-Split-Info_split-version, 
+        ID2S-Reply-Get-Split-Info_data?)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2S-Reply-Get-Split-Info_blob-id (ID2-Blob-Id)>
+
+<!-- version of split data -->
+<!ELEMENT ID2S-Reply-Get-Split-Info_split-version (%INTEGER;)>
+
+<!--
+ blob split info
+ not set if error occurred
+-->
+<!ELEMENT ID2S-Reply-Get-Split-Info_data (ID2-Reply-Data)>
+
+<!-- Reply to ID2-Request-ReGet-Blob. -->
+<!ELEMENT ID2-Reply-ReGet-Blob (
+        ID2-Reply-ReGet-Blob_blob-id, 
+        ID2-Reply-ReGet-Blob_split-version, 
+        ID2-Reply-ReGet-Blob_offset, 
+        ID2-Reply-ReGet-Blob_data?)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2-Reply-ReGet-Blob_blob-id (ID2-Blob-Id)>
+
+<!-- version of data split -->
+<!ELEMENT ID2-Reply-ReGet-Blob_split-version (%INTEGER;)>
+
+<!-- offset of data -->
+<!ELEMENT ID2-Reply-ReGet-Blob_offset (%INTEGER;)>
+
+<!--
+ blob split info
+ not set if error occurred
+-->
+<!ELEMENT ID2-Reply-ReGet-Blob_data (ID2-Reply-Data)>
+
+<!-- Reply to ID2S-Request-Get-Chunks. -->
+<!ELEMENT ID2S-Reply-Get-Chunk (
+        ID2S-Reply-Get-Chunk_blob-id, 
+        ID2S-Reply-Get-Chunk_chunk-id, 
+        ID2S-Reply-Get-Chunk_data?)>
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2S-Reply-Get-Chunk_blob-id (ID2-Blob-Id)>
+
+<!-- id of chunk to send -->
+<!ELEMENT ID2S-Reply-Get-Chunk_chunk-id (ID2S-Chunk-Id)>
+
+<!--
+ chunk data
+ not set if error occurred
+-->
+<!ELEMENT ID2S-Reply-Get-Chunk_data (ID2-Reply-Data)>
+
+<!-- Data packing. -->
+<!ELEMENT ID2-Reply-Data (
+        ID2-Reply-Data_data-type?, 
+        ID2-Reply-Data_data-format?, 
+        ID2-Reply-Data_data-compression?, 
+        ID2-Reply-Data_data)>
+<!--
+ index of negotiated types
+ recommended types
+   Seq-entry,
+   ID2S-Split-Info,
+   ID2S-Chunk
+-->
+<!ELEMENT ID2-Reply-Data_data-type (%INTEGER;)>
+<!ATTLIST ID2-Reply-Data_data-type value (
+        seq-entry |
+        seq-annot |
+        id2s-split-info |
+        id2s-chunk
+        ) #IMPLIED >
+
+<!--
+ serialization format (ASN.1 binary, ASN.1 text)
+ index of negotiated formats
+-->
+<!ELEMENT ID2-Reply-Data_data-format (%INTEGER;)>
+<!ATTLIST ID2-Reply-Data_data-format value (
+        asn-binary |
+        asn-text |
+        xml
+        ) #IMPLIED >
+
+<!--
+ post serialization compression (plain, gzip, etc.)
+ index of negotiated compressions
+-->
+<!ELEMENT ID2-Reply-Data_data-compression (%INTEGER;)>
+<!ATTLIST ID2-Reply-Data_data-compression value (
+        none |
+        gzip |
+        nlmzip |
+        bzip2
+        ) #IMPLIED >
+
+
+<!-- data blob -->
+<!ELEMENT ID2-Reply-Data_data (ID2-Reply-Data_data_E*)>
+
+
+<!ELEMENT ID2-Reply-Data_data_E (%OCTETS;)>
+
+<!-- Data packed within ID2-Reply-Get-Blob-Seq-ids reply. -->
+<!ELEMENT ID2-Blob-Seq-ids (ID2-Blob-Seq-id*)>
+
+
+<!ELEMENT ID2-Blob-Seq-id (
+        ID2-Blob-Seq-id_seq-id, 
+        ID2-Blob-Seq-id_replaced?)>
+
+<!ELEMENT ID2-Blob-Seq-id_seq-id (Seq-id)>
+
+<!-- this Seq-id is replaced by sequence in another blob -->
+<!ELEMENT ID2-Blob-Seq-id_replaced EMPTY>
+
+<!--
+*********************************************************************
+ utility types
+*********************************************************************
+-->
+<!ELEMENT ID2-Blob-Id (
+        ID2-Blob-Id_sat, 
+        ID2-Blob-Id_sub-sat?, 
+        ID2-Blob-Id_sat-key, 
+        ID2-Blob-Id_version?)>
+
+<!ELEMENT ID2-Blob-Id_sat (%INTEGER;)>
+
+<!ELEMENT ID2-Blob-Id_sub-sat (%INTEGER;)>
+<!ATTLIST ID2-Blob-Id_sub-sat value (
+        main |
+        snp |
+        snp-graph |
+        cdd |
+        mgc |
+        hprd |
+        sts |
+        trna |
+        exon
+        ) #IMPLIED >
+
+
+<!ELEMENT ID2-Blob-Id_sat-key (%INTEGER;)>
+
+<!-- version of blob, optional in some requests -->
+<!ELEMENT ID2-Blob-Id_version (%INTEGER;)>
+
+
+<!ELEMENT ID2-Params (ID2-Param*)>
+
+
+<!ELEMENT ID2-Param (
+        ID2-Param_name, 
+        ID2-Param_value?, 
+        ID2-Param_type?)>
+
+<!ELEMENT ID2-Param_name (#PCDATA)>
+
+<!ELEMENT ID2-Param_value (ID2-Param_value_E*)>
+
+
+<!ELEMENT ID2-Param_value_E (#PCDATA)>
+
+<!ELEMENT ID2-Param_type %ENUM;>
+
+<!--
+    set-value	-  no response expected
+    get-value	-  this option is for client only
+         server replies with its value of param if known
+         server omits this param in reply if unknown to server
+    force-value	-  no direct response expected,
+         but if the param or its value is not supported
+         an error is reported and the request is not be completed
+    use-package	-  use named package
+         value should be unset
+-->
+<!ATTLIST ID2-Param_type value (
+        set-value |
+        get-value |
+        force-value |
+        use-package
+        ) #REQUIRED >
+
+
diff --git a/dtd/NCBI_MedArchive.dtd b/dtd/NCBI_MedArchive.dtd
new file mode 100644
index 0000000..1082302
--- /dev/null
+++ b/dtd/NCBI_MedArchive.dtd
@@ -0,0 +1,35 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mla.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_MedArchive.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_MedArchive_module PUBLIC "-//NCBI//NCBI MedArchive Module//EN" "NCBI_MedArchive.mod.dtd">
+%NCBI_MedArchive_module;
+
+<!ENTITY % NCBI_Medlars_module PUBLIC "-//NCBI//NCBI Medlars Module//EN" "NCBI_Medlars.mod.dtd">
+%NCBI_Medlars_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_PubMed_module PUBLIC "-//NCBI//NCBI PubMed Module//EN" "NCBI_PubMed.mod.dtd">
+%NCBI_PubMed_module;
diff --git a/dtd/NCBI_MedArchive.mod.dtd b/dtd/NCBI_MedArchive.mod.dtd
new file mode 100644
index 0000000..b4c2701
--- /dev/null
+++ b/dtd/NCBI_MedArchive.mod.dtd
@@ -0,0 +1,271 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mla.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 11/02/2010 23:04:52
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-MedArchive"
+================================================= -->
+
+<!--
+$Revision: 209893 $
+********************************************************************
+
+  Network MEDLINE Archive message formats
+  Ostell 1993
+
+
+*********************************************************************
+
+  mla.asn
+
+     messages for medline archive data access
+
+*********************************************************************
+-->
+
+<!-- Elements referenced from other modules:
+          Medline-entry FROM NCBI-Medline,
+          Medlars-entry FROM NCBI-Medlars,
+          Pubmed-entry FROM NCBI-PubMed,
+          Medline-si FROM NCBI-Medline,
+          Pub FROM NCBI-Pub,
+          Title,
+          PubMedId FROM NCBI-Biblio -->
+<!-- ============================================ -->
+
+<!--
+**********************************
+ requests
+
+-->
+<!ELEMENT Mla-request (
+        Mla-request_init | 
+        Mla-request_getmle | 
+        Mla-request_getpub | 
+        Mla-request_gettitle | 
+        Mla-request_citmatch | 
+        Mla-request_fini | 
+        Mla-request_getmriuids | 
+        Mla-request_getaccuids | 
+        Mla-request_uidtopmid | 
+        Mla-request_pmidtouid | 
+        Mla-request_getmlepmid | 
+        Mla-request_getpubpmid | 
+        Mla-request_citmatchpmid | 
+        Mla-request_getmripmids | 
+        Mla-request_getaccpmids | 
+        Mla-request_citlstpmids | 
+        Mla-request_getmleuid | 
+        Mla-request_getmlrpmid | 
+        Mla-request_getmlruid)>
+
+<!-- DlInit -->
+<!ELEMENT Mla-request_init EMPTY>
+
+<!-- get MedlineEntry -->
+<!ELEMENT Mla-request_getmle (%INTEGER;)>
+
+<!-- get citation by muid -->
+<!ELEMENT Mla-request_getpub (%INTEGER;)>
+
+<!-- match titles -->
+<!ELEMENT Mla-request_gettitle (Title-msg)>
+
+<!-- -->
+<!ELEMENT Mla-request_citmatch (Pub)>
+
+<!-- DlFini -->
+<!ELEMENT Mla-request_fini EMPTY>
+
+<!-- Get MUIDs for an MRI -->
+<!ELEMENT Mla-request_getmriuids (%INTEGER;)>
+
+<!-- Get MUIDs for an Accessions -->
+<!ELEMENT Mla-request_getaccuids (Medline-si)>
+
+<!-- get PMID for MUID -->
+<!ELEMENT Mla-request_uidtopmid (%INTEGER;)>
+
+<!-- get MUID for PMID -->
+<!ELEMENT Mla-request_pmidtouid (PubMedId)>
+
+<!-- get MedlineEntry by PubMed id -->
+<!ELEMENT Mla-request_getmlepmid (PubMedId)>
+
+<!-- get citation by PubMed id -->
+<!ELEMENT Mla-request_getpubpmid (PubMedId)>
+
+<!-- citation match, PMID on out -->
+<!ELEMENT Mla-request_citmatchpmid (Pub)>
+
+<!-- get PMIDs for an MRI -->
+<!ELEMENT Mla-request_getmripmids (%INTEGER;)>
+
+<!-- get PMIDs for an Accessions -->
+<!ELEMENT Mla-request_getaccpmids (Medline-si)>
+
+<!-- generate list of PMID for Pub -->
+<!ELEMENT Mla-request_citlstpmids (Pub)>
+
+<!-- get MedlineEntry by Medline id -->
+<!ELEMENT Mla-request_getmleuid (%INTEGER;)>
+
+<!-- get MedlarsEntry by PubMed id -->
+<!ELEMENT Mla-request_getmlrpmid (PubMedId)>
+
+<!-- get MedlarsEntry by Medline id -->
+<!ELEMENT Mla-request_getmlruid (%INTEGER;)>
+
+<!--
+**********************************************************************
+
+  if request = all
+	if one row returned
+	   reply=all, return every column
+	else 
+	   reply=ml-jta for each row
+
+  if request = not-set, reply=ml-jta
+
+  otherwise,
+	if request != ml-jta
+	   if column exist, reply=column, else reply=ml-jta
+
+**********************************************************************
+-->
+<!ELEMENT Title-type %ENUM;>
+
+<!--
+    not-set	-  request=ml-jta (default), reply=not-found
+-->
+<!ATTLIST Title-type value (
+        not-set |
+        name |
+        tsub |
+        trans |
+        jta |
+        iso-jta |
+        ml-jta |
+        coden |
+        issn |
+        abr |
+        isbn |
+        all
+        ) #REQUIRED >
+
+
+<!-- Title match request/response -->
+<!ELEMENT Title-msg (
+        Title-msg_type, 
+        Title-msg_title)>
+
+<!-- type to get, or type returned -->
+<!ELEMENT Title-msg_type (Title-type)>
+
+<!-- title(s) to look up, or title(s) found -->
+<!ELEMENT Title-msg_title (Title)>
+
+
+<!ELEMENT Title-msg-list (
+        Title-msg-list_num, 
+        Title-msg-list_titles)>
+
+<!-- number of titles -->
+<!ELEMENT Title-msg-list_num (%INTEGER;)>
+
+<!ELEMENT Title-msg-list_titles (Title-msg*)>
+
+
+<!ELEMENT Error-val %ENUM;>
+
+<!--
+    not-found	-  Entry was not found
+    operational-error	-  A run-time operation error was occurred
+    cannot-connect-jrsrv	-  Cannot connect to Journal server
+    cannot-connect-pmdb	-  Cannot connect to PubMed
+    journal-not-found	-  Journal title not found
+    citation-not-found	-  Volume, Page and Author do not match any
+         article
+    citation-ambiguous	-  More than one article found
+    citation-too-many	-  Too many article was found
+    cannot-connect-searchbackend-jrsrv	-  Cannot connect to searchbackend Journals db
+    cannot-connect-searchbackend-pmdb	-  Cannot connect to searchbackend PubMed db
+    cannot-connect-docsumbackend	-  Cannot connect to docsumbackend
+-->
+<!ATTLIST Error-val value (
+        not-found |
+        operational-error |
+        cannot-connect-jrsrv |
+        cannot-connect-pmdb |
+        journal-not-found |
+        citation-not-found |
+        citation-ambiguous |
+        citation-too-many |
+        cannot-connect-searchbackend-jrsrv |
+        cannot-connect-searchbackend-pmdb |
+        cannot-connect-docsumbackend
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Mla-back (
+        Mla-back_init | 
+        Mla-back_error | 
+        Mla-back_getmle | 
+        Mla-back_getpub | 
+        Mla-back_gettitle | 
+        Mla-back_citmatch | 
+        Mla-back_fini | 
+        Mla-back_getuids | 
+        Mla-back_getpmids | 
+        Mla-back_outuid | 
+        Mla-back_outpmid | 
+        Mla-back_getpme | 
+        Mla-back_getmlr)>
+
+<!-- DlInit -->
+<!ELEMENT Mla-back_init EMPTY>
+
+<!-- not found for getmle/getpub/citmatch -->
+<!ELEMENT Mla-back_error (Error-val)>
+
+<!-- got Medline Entry -->
+<!ELEMENT Mla-back_getmle (Medline-entry)>
+
+<!ELEMENT Mla-back_getpub (Pub)>
+
+<!-- match titles -->
+<!ELEMENT Mla-back_gettitle (Title-msg-list)>
+
+<!-- citation lookup muid or 0 -->
+<!ELEMENT Mla-back_citmatch (%INTEGER;)>
+
+<!-- DlFini -->
+<!ELEMENT Mla-back_fini EMPTY>
+
+<!-- got a set of MUIDs -->
+<!ELEMENT Mla-back_getuids (Mla-back_getuids_E*)>
+
+
+<!ELEMENT Mla-back_getuids_E (%INTEGER;)>
+
+<!-- got a set of PMIDs -->
+<!ELEMENT Mla-back_getpmids (Mla-back_getpmids_E*)>
+
+
+<!ELEMENT Mla-back_getpmids_E (%INTEGER;)>
+
+<!-- result muid or 0 if not found -->
+<!ELEMENT Mla-back_outuid (%INTEGER;)>
+
+<!-- result pmid or 0 if not found -->
+<!ELEMENT Mla-back_outpmid (PubMedId)>
+
+<!-- got Pubmed Entry -->
+<!ELEMENT Mla-back_getpme (Pubmed-entry)>
+
+<!-- got Medlars Entry -->
+<!ELEMENT Mla-back_getmlr (Medlars-entry)>
+
diff --git a/dtd/NCBI_Medlars.dtd b/dtd/NCBI_Medlars.dtd
new file mode 100644
index 0000000..6d1410c
--- /dev/null
+++ b/dtd/NCBI_Medlars.dtd
@@ -0,0 +1,23 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "medlars.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Medlars.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medlars_module PUBLIC "-//NCBI//NCBI Medlars Module//EN" "NCBI_Medlars.mod.dtd">
+%NCBI_Medlars_module;
diff --git a/dtd/NCBI_Medlars.mod.dtd b/dtd/NCBI_Medlars.mod.dtd
new file mode 100644
index 0000000..cb8d48a
--- /dev/null
+++ b/dtd/NCBI_Medlars.mod.dtd
@@ -0,0 +1,58 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "medlars.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Medlars"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+**********************************************************************
+
+  MEDLARS data definitions
+  Grigoriy Starchenko, 1997
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Medlars-entry,
+          Medlars-record -->
+
+<!-- Elements referenced from other modules:
+          PubMedId FROM NCBI-Biblio -->
+<!-- ============================================ -->
+
+<!-- a MEDLARS entry -->
+<!ELEMENT Medlars-entry (
+        Medlars-entry_pmid, 
+        Medlars-entry_muid?, 
+        Medlars-entry_recs)>
+
+<!-- All entries in PubMed must have it -->
+<!ELEMENT Medlars-entry_pmid (PubMedId)>
+
+<!-- Medline(OCCS) id -->
+<!ELEMENT Medlars-entry_muid (%INTEGER;)>
+
+<!-- List of Medlars records -->
+<!ELEMENT Medlars-entry_recs (Medlars-record*)>
+
+
+<!ELEMENT Medlars-record (
+        Medlars-record_code, 
+        Medlars-record_abbr?, 
+        Medlars-record_data)>
+
+<!-- Unit record field type integer form -->
+<!ELEMENT Medlars-record_code (%INTEGER;)>
+
+<!-- Unit record field type abbreviation form -->
+<!ELEMENT Medlars-record_abbr (#PCDATA)>
+
+<!-- Unit record data -->
+<!ELEMENT Medlars-record_data (#PCDATA)>
+
diff --git a/dtd/NCBI_Medline.dtd b/dtd/NCBI_Medline.dtd
new file mode 100644
index 0000000..9495345
--- /dev/null
+++ b/dtd/NCBI_Medline.dtd
@@ -0,0 +1,23 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "medline.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Medline.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
diff --git a/dtd/NCBI_Medline.mod.dtd b/dtd/NCBI_Medline.mod.dtd
new file mode 100644
index 0000000..b05a78e
--- /dev/null
+++ b/dtd/NCBI_Medline.mod.dtd
@@ -0,0 +1,245 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "medline.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Medline"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+**********************************************************************
+
+  MEDLINE data definitions
+  James Ostell, 1990
+
+  enhanced in 1996 to support PubMed records as well by simply adding
+    the PubMedId and making MedlineId optional
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Medline-entry,
+          Medline-si -->
+
+<!-- Elements referenced from other modules:
+          Cit-art,
+          PubMedId FROM NCBI-Biblio,
+          Date FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+ a MEDLINE or PubMed entry
+ regular medline record
+-->
+<!ELEMENT Medline-entry (
+        Medline-entry_uid?, 
+        Medline-entry_em, 
+        Medline-entry_cit, 
+        Medline-entry_abstract?, 
+        Medline-entry_mesh?, 
+        Medline-entry_substance?, 
+        Medline-entry_xref?, 
+        Medline-entry_idnum?, 
+        Medline-entry_gene?, 
+        Medline-entry_pmid?, 
+        Medline-entry_pub-type?, 
+        Medline-entry_mlfield?, 
+        Medline-entry_status?)>
+
+<!-- MEDLINE UID, sometimes not yet available if from PubMed -->
+<!ELEMENT Medline-entry_uid (%INTEGER;)>
+
+<!-- Entry Month -->
+<!ELEMENT Medline-entry_em (Date)>
+
+<!-- article citation -->
+<!ELEMENT Medline-entry_cit (Cit-art)>
+
+<!ELEMENT Medline-entry_abstract (#PCDATA)>
+
+<!ELEMENT Medline-entry_mesh (Medline-mesh*)>
+
+<!ELEMENT Medline-entry_substance (Medline-rn*)>
+
+<!ELEMENT Medline-entry_xref (Medline-si*)>
+
+<!-- ID Number (grants, contracts) -->
+<!ELEMENT Medline-entry_idnum (Medline-entry_idnum_E*)>
+
+
+<!ELEMENT Medline-entry_idnum_E (#PCDATA)>
+
+<!ELEMENT Medline-entry_gene (Medline-entry_gene_E*)>
+
+
+<!ELEMENT Medline-entry_gene_E (#PCDATA)>
+
+<!-- MEDLINE records may include the PubMedId -->
+<!ELEMENT Medline-entry_pmid (PubMedId)>
+
+<!-- may show publication types (review, etc) -->
+<!ELEMENT Medline-entry_pub-type (Medline-entry_pub-type_E*)>
+
+
+<!ELEMENT Medline-entry_pub-type_E (#PCDATA)>
+
+<!-- additional Medline field types -->
+<!ELEMENT Medline-entry_mlfield (Medline-field*)>
+
+<!ELEMENT Medline-entry_status (%INTEGER;)>
+
+<!--
+    publisher	-  record as supplied by publisher
+    premedline	-  premedline record
+-->
+<!ATTLIST Medline-entry_status value (
+        publisher |
+        premedline |
+        medline
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Medline-mesh (
+        Medline-mesh_mp?, 
+        Medline-mesh_term, 
+        Medline-mesh_qual?)>
+
+<!-- TRUE if main point (*) -->
+<!ELEMENT Medline-mesh_mp EMPTY>
+<!ATTLIST Medline-mesh_mp value ( true | false ) "false" >
+
+
+<!-- the MeSH term -->
+<!ELEMENT Medline-mesh_term (#PCDATA)>
+
+<!-- qualifiers -->
+<!ELEMENT Medline-mesh_qual (Medline-qual*)>
+
+
+<!ELEMENT Medline-qual (
+        Medline-qual_mp?, 
+        Medline-qual_subh)>
+
+<!-- TRUE if main point -->
+<!ELEMENT Medline-qual_mp EMPTY>
+<!ATTLIST Medline-qual_mp value ( true | false ) "false" >
+
+
+<!-- the subheading -->
+<!ELEMENT Medline-qual_subh (#PCDATA)>
+
+<!-- medline substance records -->
+<!ELEMENT Medline-rn (
+        Medline-rn_type, 
+        Medline-rn_cit?, 
+        Medline-rn_name)>
+<!-- type of record -->
+<!ELEMENT Medline-rn_type %ENUM;>
+
+<!--
+    cas	-  CAS number
+    ec	-  EC number
+-->
+<!ATTLIST Medline-rn_type value (
+        nameonly |
+        cas |
+        ec
+        ) #REQUIRED >
+
+
+<!-- CAS or EC number if present -->
+<!ELEMENT Medline-rn_cit (#PCDATA)>
+
+<!-- name (always present) -->
+<!ELEMENT Medline-rn_name (#PCDATA)>
+
+<!-- medline cross reference records -->
+<!ELEMENT Medline-si (
+        Medline-si_type, 
+        Medline-si_cit?)>
+<!-- type of xref -->
+<!ELEMENT Medline-si_type %ENUM;>
+
+<!--
+    ddbj	-  DNA Data Bank of Japan
+    carbbank	-  Carbohydrate Structure Database
+    embl	-  EMBL Data Library
+    hdb	-  Hybridoma Data Bank
+    genbank	-  GenBank
+    hgml	-  Human Gene Map Library
+    mim	-  Mendelian Inheritance in Man
+    msd	-  Microbial Strains Database
+    pdb	-  Protein Data Bank (Brookhaven)
+    pir	-  Protein Identification Resource
+    prfseqdb	-  Protein Research Foundation (Japan)
+    psd	-  Protein Sequence Database (Japan)
+    swissprot	-  SwissProt
+    gdb	-  Genome Data Base
+-->
+<!ATTLIST Medline-si_type value (
+        ddbj |
+        carbbank |
+        embl |
+        hdb |
+        genbank |
+        hgml |
+        mim |
+        msd |
+        pdb |
+        pir |
+        prfseqdb |
+        psd |
+        swissprot |
+        gdb
+        ) #REQUIRED >
+
+
+<!-- the citation/accession number -->
+<!ELEMENT Medline-si_cit (#PCDATA)>
+
+
+<!ELEMENT Medline-field (
+        Medline-field_type, 
+        Medline-field_str, 
+        Medline-field_ids?)>
+<!-- Keyed type -->
+<!ELEMENT Medline-field_type (%INTEGER;)>
+
+<!--
+    other	-  look in line code
+    comment	-  comment line
+    erratum	-  retracted, corrected, etc
+-->
+<!ATTLIST Medline-field_type value (
+        other |
+        comment |
+        erratum
+        ) #IMPLIED >
+
+
+<!-- the text -->
+<!ELEMENT Medline-field_str (#PCDATA)>
+
+<!-- pointers relevant to this text -->
+<!ELEMENT Medline-field_ids (DocRef*)>
+
+<!-- reference to a document -->
+<!ELEMENT DocRef (
+        DocRef_type, 
+        DocRef_uid)>
+
+<!ELEMENT DocRef_type (%INTEGER;)>
+<!ATTLIST DocRef_type value (
+        medline |
+        pubmed |
+        ncbigi
+        ) #IMPLIED >
+
+
+<!ELEMENT DocRef_uid (%INTEGER;)>
+
diff --git a/dtd/NCBI_Mim.dtd b/dtd/NCBI_Mim.dtd
new file mode 100644
index 0000000..7dc862b
--- /dev/null
+++ b/dtd/NCBI_Mim.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mim.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Mim.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Mim_module PUBLIC "-//NCBI//NCBI Mim Module//EN" "NCBI_Mim.mod.dtd">
+%NCBI_Mim_module;
diff --git a/dtd/NCBI_Mim.mod.dtd b/dtd/NCBI_Mim.mod.dtd
new file mode 100644
index 0000000..664a851
--- /dev/null
+++ b/dtd/NCBI_Mim.mod.dtd
@@ -0,0 +1,354 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "mim.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Mim"
+================================================= -->
+
+<!--
+********************************************************************
+
+  MIM data definitions
+  Brandon Brylawski, 1996.
+  version 2.1
+
+********************************************************************
+-->
+
+
+<!ELEMENT Mim-entries (Mim-entry*)>
+
+
+<!ELEMENT Mim-set (
+        Mim-set_releaseDate, 
+        Mim-set_mimEntries)>
+
+<!ELEMENT Mim-set_releaseDate (Mim-date)>
+
+<!ELEMENT Mim-set_mimEntries (Mim-entry*)>
+
+
+<!ELEMENT Mim-entry (
+        Mim-entry_mimNumber, 
+        Mim-entry_mimType, 
+        Mim-entry_title, 
+        Mim-entry_copyright?, 
+        Mim-entry_symbol?, 
+        Mim-entry_locus?, 
+        Mim-entry_synonyms?, 
+        Mim-entry_aliases?, 
+        Mim-entry_included?, 
+        Mim-entry_seeAlso?, 
+        Mim-entry_text?, 
+        Mim-entry_textfields?, 
+        Mim-entry_hasSummary?, 
+        Mim-entry_summary?, 
+        Mim-entry_summaryAttribution?, 
+        Mim-entry_summaryEditHistory?, 
+        Mim-entry_summaryCreationDate?, 
+        Mim-entry_allelicVariants?, 
+        Mim-entry_hasSynopsis?, 
+        Mim-entry_clinicalSynopsis?, 
+        Mim-entry_synopsisAttribution?, 
+        Mim-entry_synopsisEditHistory?, 
+        Mim-entry_synopsisCreationDate?, 
+        Mim-entry_editHistory?, 
+        Mim-entry_creationDate?, 
+        Mim-entry_references?, 
+        Mim-entry_attribution?, 
+        Mim-entry_numGeneMaps, 
+        Mim-entry_medlineLinks?, 
+        Mim-entry_proteinLinks?, 
+        Mim-entry_nucleotideLinks?, 
+        Mim-entry_structureLinks?, 
+        Mim-entry_genomeLinks?)>
+
+<!ELEMENT Mim-entry_mimNumber (#PCDATA)>
+
+<!ELEMENT Mim-entry_mimType (%INTEGER;)>
+<!ATTLIST Mim-entry_mimType value (
+        none |
+        star |
+        caret |
+        pound |
+        plus |
+        perc
+        ) #IMPLIED >
+
+
+<!ELEMENT Mim-entry_title (#PCDATA)>
+
+<!ELEMENT Mim-entry_copyright (#PCDATA)>
+
+<!ELEMENT Mim-entry_symbol (#PCDATA)>
+
+<!ELEMENT Mim-entry_locus (#PCDATA)>
+
+<!ELEMENT Mim-entry_synonyms (Mim-entry_synonyms_E*)>
+
+
+<!ELEMENT Mim-entry_synonyms_E (#PCDATA)>
+
+<!ELEMENT Mim-entry_aliases (Mim-entry_aliases_E*)>
+
+
+<!ELEMENT Mim-entry_aliases_E (#PCDATA)>
+
+<!ELEMENT Mim-entry_included (Mim-entry_included_E*)>
+
+
+<!ELEMENT Mim-entry_included_E (#PCDATA)>
+
+<!ELEMENT Mim-entry_seeAlso (Mim-cit*)>
+
+<!ELEMENT Mim-entry_text (Mim-text*)>
+
+<!ELEMENT Mim-entry_textfields (Mim-text*)>
+
+<!ELEMENT Mim-entry_hasSummary EMPTY>
+<!ATTLIST Mim-entry_hasSummary value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Mim-entry_summary (Mim-text*)>
+
+<!ELEMENT Mim-entry_summaryAttribution (Mim-edit-item*)>
+
+<!ELEMENT Mim-entry_summaryEditHistory (Mim-edit-item*)>
+
+<!ELEMENT Mim-entry_summaryCreationDate (Mim-edit-item)>
+
+<!ELEMENT Mim-entry_allelicVariants (Mim-allelic-variant*)>
+
+<!ELEMENT Mim-entry_hasSynopsis EMPTY>
+<!ATTLIST Mim-entry_hasSynopsis value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Mim-entry_clinicalSynopsis (Mim-index-term*)>
+
+<!ELEMENT Mim-entry_synopsisAttribution (Mim-edit-item*)>
+
+<!ELEMENT Mim-entry_synopsisEditHistory (Mim-edit-item*)>
+
+<!ELEMENT Mim-entry_synopsisCreationDate (Mim-edit-item)>
+
+<!ELEMENT Mim-entry_editHistory (Mim-edit-item*)>
+
+<!ELEMENT Mim-entry_creationDate (Mim-edit-item)>
+
+<!ELEMENT Mim-entry_references (Mim-reference*)>
+
+<!ELEMENT Mim-entry_attribution (Mim-edit-item*)>
+
+<!ELEMENT Mim-entry_numGeneMaps (%INTEGER;)>
+
+<!ELEMENT Mim-entry_medlineLinks (Mim-link)>
+
+<!ELEMENT Mim-entry_proteinLinks (Mim-link)>
+
+<!ELEMENT Mim-entry_nucleotideLinks (Mim-link)>
+
+<!ELEMENT Mim-entry_structureLinks (Mim-link)>
+
+<!ELEMENT Mim-entry_genomeLinks (Mim-link)>
+
+
+<!ELEMENT Mim-text (
+        Mim-text_label, 
+        Mim-text_text, 
+        Mim-text_neighbors?)>
+
+<!ELEMENT Mim-text_label (#PCDATA)>
+
+<!ELEMENT Mim-text_text (#PCDATA)>
+
+<!ELEMENT Mim-text_neighbors (Mim-link)>
+
+
+<!ELEMENT Mim-allelic-variant (
+        Mim-allelic-variant_number, 
+        Mim-allelic-variant_name, 
+        Mim-allelic-variant_aliases?, 
+        Mim-allelic-variant_mutation?, 
+        Mim-allelic-variant_description?, 
+        Mim-allelic-variant_snpLinks?)>
+
+<!ELEMENT Mim-allelic-variant_number (#PCDATA)>
+
+<!ELEMENT Mim-allelic-variant_name (#PCDATA)>
+
+<!ELEMENT Mim-allelic-variant_aliases (Mim-allelic-variant_aliases_E*)>
+
+
+<!ELEMENT Mim-allelic-variant_aliases_E (#PCDATA)>
+
+<!ELEMENT Mim-allelic-variant_mutation (Mim-text*)>
+
+<!ELEMENT Mim-allelic-variant_description (Mim-text*)>
+
+<!ELEMENT Mim-allelic-variant_snpLinks (Mim-link)>
+
+
+<!ELEMENT Mim-link (
+        Mim-link_num, 
+        Mim-link_uids, 
+        Mim-link_numRelevant?)>
+
+<!ELEMENT Mim-link_num (%INTEGER;)>
+
+<!ELEMENT Mim-link_uids (#PCDATA)>
+
+<!ELEMENT Mim-link_numRelevant (%INTEGER;)>
+
+
+<!ELEMENT Mim-author (
+        Mim-author_name, 
+        Mim-author_index)>
+
+<!ELEMENT Mim-author_name (#PCDATA)>
+
+<!ELEMENT Mim-author_index (%INTEGER;)>
+
+
+<!ELEMENT Mim-cit (
+        Mim-cit_number, 
+        Mim-cit_author, 
+        Mim-cit_others, 
+        Mim-cit_year)>
+
+<!ELEMENT Mim-cit_number (%INTEGER;)>
+
+<!ELEMENT Mim-cit_author (#PCDATA)>
+
+<!ELEMENT Mim-cit_others (#PCDATA)>
+
+<!ELEMENT Mim-cit_year (%INTEGER;)>
+
+
+<!ELEMENT Mim-reference (
+        Mim-reference_number, 
+        Mim-reference_origNumber?, 
+        Mim-reference_type?, 
+        Mim-reference_authors, 
+        Mim-reference_primaryAuthor, 
+        Mim-reference_otherAuthors, 
+        Mim-reference_citationTitle, 
+        Mim-reference_citationType?, 
+        Mim-reference_bookTitle?, 
+        Mim-reference_editors?, 
+        Mim-reference_volume?, 
+        Mim-reference_edition?, 
+        Mim-reference_journal?, 
+        Mim-reference_series?, 
+        Mim-reference_publisher?, 
+        Mim-reference_place?, 
+        Mim-reference_commNote?, 
+        Mim-reference_pubDate, 
+        Mim-reference_pages?, 
+        Mim-reference_miscInfo?, 
+        Mim-reference_pubmedUID?, 
+        Mim-reference_ambiguous, 
+        Mim-reference_noLink?)>
+
+<!ELEMENT Mim-reference_number (%INTEGER;)>
+
+<!ELEMENT Mim-reference_origNumber (%INTEGER;)>
+
+<!ELEMENT Mim-reference_type %ENUM;>
+<!ATTLIST Mim-reference_type value (
+        not-set |
+        citation |
+        book |
+        personal-communication |
+        book-citation
+        ) #REQUIRED >
+
+
+<!ELEMENT Mim-reference_authors (Mim-author*)>
+
+<!ELEMENT Mim-reference_primaryAuthor (#PCDATA)>
+
+<!ELEMENT Mim-reference_otherAuthors (#PCDATA)>
+
+<!ELEMENT Mim-reference_citationTitle (#PCDATA)>
+
+<!ELEMENT Mim-reference_citationType (%INTEGER;)>
+
+<!ELEMENT Mim-reference_bookTitle (#PCDATA)>
+
+<!ELEMENT Mim-reference_editors (Mim-author*)>
+
+<!ELEMENT Mim-reference_volume (#PCDATA)>
+
+<!ELEMENT Mim-reference_edition (#PCDATA)>
+
+<!ELEMENT Mim-reference_journal (#PCDATA)>
+
+<!ELEMENT Mim-reference_series (#PCDATA)>
+
+<!ELEMENT Mim-reference_publisher (#PCDATA)>
+
+<!ELEMENT Mim-reference_place (#PCDATA)>
+
+<!ELEMENT Mim-reference_commNote (#PCDATA)>
+
+<!ELEMENT Mim-reference_pubDate (Mim-date)>
+
+<!ELEMENT Mim-reference_pages (Mim-page*)>
+
+<!ELEMENT Mim-reference_miscInfo (#PCDATA)>
+
+<!ELEMENT Mim-reference_pubmedUID (%INTEGER;)>
+
+<!ELEMENT Mim-reference_ambiguous EMPTY>
+<!ATTLIST Mim-reference_ambiguous value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Mim-reference_noLink EMPTY>
+<!ATTLIST Mim-reference_noLink value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT Mim-index-term (
+        Mim-index-term_key, 
+        Mim-index-term_terms)>
+
+<!ELEMENT Mim-index-term_key (#PCDATA)>
+
+<!ELEMENT Mim-index-term_terms (Mim-index-term_terms_E*)>
+
+
+<!ELEMENT Mim-index-term_terms_E (#PCDATA)>
+
+
+<!ELEMENT Mim-edit-item (
+        Mim-edit-item_author, 
+        Mim-edit-item_modDate)>
+
+<!ELEMENT Mim-edit-item_author (#PCDATA)>
+
+<!ELEMENT Mim-edit-item_modDate (Mim-date)>
+
+
+<!ELEMENT Mim-date (
+        Mim-date_year, 
+        Mim-date_month?, 
+        Mim-date_day?)>
+
+<!ELEMENT Mim-date_year (%INTEGER;)>
+
+<!ELEMENT Mim-date_month (%INTEGER;)>
+
+<!ELEMENT Mim-date_day (%INTEGER;)>
+
+
+<!ELEMENT Mim-page (
+        Mim-page_from, 
+        Mim-page_to?)>
+
+<!ELEMENT Mim-page_from (#PCDATA)>
+
+<!ELEMENT Mim-page_to (#PCDATA)>
+
diff --git a/dtd/NCBI_Mime.dtd b/dtd/NCBI_Mime.dtd
new file mode 100644
index 0000000..a7be929
--- /dev/null
+++ b/dtd/NCBI_Mime.dtd
@@ -0,0 +1,113 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "ncbimime.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Mime.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Cdd_module PUBLIC "-//NCBI//NCBI Cdd Module//EN" "NCBI_Cdd.mod.dtd">
+%NCBI_Cdd_module;
+
+<!ENTITY % NCBI_Cn3d_module PUBLIC "-//NCBI//NCBI Cn3d Module//EN" "NCBI_Cn3d.mod.dtd">
+%NCBI_Cn3d_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Mime_module PUBLIC "-//NCBI//NCBI Mime Module//EN" "NCBI_Mime.mod.dtd">
+%NCBI_Mime_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_ScoreMat_module PUBLIC "-//NCBI//NCBI ScoreMat Module//EN" "NCBI_ScoreMat.mod.dtd">
+%NCBI_ScoreMat_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Mime.mod.dtd b/dtd/NCBI_Mime.mod.dtd
new file mode 100644
index 0000000..a7f8ef4
--- /dev/null
+++ b/dtd/NCBI_Mime.mod.dtd
@@ -0,0 +1,251 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "ncbimime.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Mime"
+================================================= -->
+
+<!--
+$Revision: 6.12 $
+****************************************************************
+
+  NCBI MIME type (chemical/ncbi-asn1-ascii and chemical/ncbi-asn1-binary)
+  by Jonathan Epstein, February 1996
+
+****************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Ncbi-mime-asn1 -->
+
+<!-- Elements referenced from other modules:
+          Biostruc,
+          Biostruc-annot-set FROM MMDB,
+          Cdd FROM NCBI-Cdd,
+          Seq-entry FROM NCBI-Seqset,
+          Seq-annot FROM NCBI-Sequence,
+          Medline-entry FROM NCBI-Medline,
+          Cn3d-style-dictionary,
+          Cn3d-user-annotations FROM NCBI-Cn3d -->
+<!-- ============================================ -->
+
+
+<!ELEMENT Ncbi-mime-asn1 (
+        Ncbi-mime-asn1_entrez | 
+        Ncbi-mime-asn1_alignstruc | 
+        Ncbi-mime-asn1_alignseq | 
+        Ncbi-mime-asn1_strucseq | 
+        Ncbi-mime-asn1_strucseqs | 
+        Ncbi-mime-asn1_general)>
+
+<!-- just a structure -->
+<!ELEMENT Ncbi-mime-asn1_entrez (Entrez-general)>
+
+<!-- structures & sequences & alignments -->
+<!ELEMENT Ncbi-mime-asn1_alignstruc (Biostruc-align)>
+
+<!-- sequence alignment -->
+<!ELEMENT Ncbi-mime-asn1_alignseq (Biostruc-align-seq)>
+
+<!-- structure & sequences -->
+<!ELEMENT Ncbi-mime-asn1_strucseq (Biostruc-seq)>
+
+<!-- structure & sequences & alignments -->
+<!ELEMENT Ncbi-mime-asn1_strucseqs (Biostruc-seqs)>
+
+<!--
+ all-purpose "grab bag"
+ others may be added here in the future
+-->
+<!ELEMENT Ncbi-mime-asn1_general (Biostruc-seqs-aligns-cdd)>
+
+<!-- generic bundle of sequence and alignment info -->
+<!ELEMENT Bundle-seqs-aligns (
+        Bundle-seqs-aligns_sequences?, 
+        Bundle-seqs-aligns_seqaligns?, 
+        Bundle-seqs-aligns_strucaligns?, 
+        Bundle-seqs-aligns_imports?, 
+        Bundle-seqs-aligns_style-dictionary?, 
+        Bundle-seqs-aligns_user-annotations?)>
+
+<!-- sequences -->
+<!ELEMENT Bundle-seqs-aligns_sequences (Seq-entry*)>
+
+<!-- sequence alignments -->
+<!ELEMENT Bundle-seqs-aligns_seqaligns (Seq-annot*)>
+
+<!-- structure alignments -->
+<!ELEMENT Bundle-seqs-aligns_strucaligns (Biostruc-annot-set)>
+
+<!-- imports (updates in Cn3D) -->
+<!ELEMENT Bundle-seqs-aligns_imports (Seq-annot*)>
+
+<!-- Cn3D stuff -->
+<!ELEMENT Bundle-seqs-aligns_style-dictionary (Cn3d-style-dictionary)>
+
+<!ELEMENT Bundle-seqs-aligns_user-annotations (Cn3d-user-annotations)>
+
+
+<!ELEMENT Biostruc-seqs-aligns-cdd (
+        Biostruc-seqs-aligns-cdd_seq-align-data, 
+        Biostruc-seqs-aligns-cdd_structures?, 
+        Biostruc-seqs-aligns-cdd_structure-type?)>
+
+<!ELEMENT Biostruc-seqs-aligns-cdd_seq-align-data (
+        Biostruc-seqs-aligns-cdd_seq-align-data_bundle | 
+        Biostruc-seqs-aligns-cdd_seq-align-data_cdd)>
+
+<!-- either seqs + alignments -->
+<!ELEMENT Biostruc-seqs-aligns-cdd_seq-align-data_bundle (Bundle-seqs-aligns)>
+
+<!-- or CDD (which contains these) -->
+<!ELEMENT Biostruc-seqs-aligns-cdd_seq-align-data_cdd (Cdd)>
+
+<!-- structures -->
+<!ELEMENT Biostruc-seqs-aligns-cdd_structures (Biostruc*)>
+<!-- type of structures to load if -->
+<!ELEMENT Biostruc-seqs-aligns-cdd_structure-type %ENUM;>
+
+<!--
+    ncbi-backbone	-  not present; meanings and
+    ncbi-all-atom	-  values are same as MMDB's
+    pdb-model	-  Model-type
+-->
+<!ATTLIST Biostruc-seqs-aligns-cdd_structure-type value (
+        ncbi-backbone |
+        ncbi-all-atom |
+        pdb-model
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Biostruc-align (
+        Biostruc-align_master, 
+        Biostruc-align_slaves, 
+        Biostruc-align_alignments, 
+        Biostruc-align_sequences, 
+        Biostruc-align_seqalign, 
+        Biostruc-align_style-dictionary?, 
+        Biostruc-align_user-annotations?)>
+
+<!ELEMENT Biostruc-align_master (Biostruc)>
+
+<!ELEMENT Biostruc-align_slaves (Biostruc*)>
+
+<!-- structure alignments -->
+<!ELEMENT Biostruc-align_alignments (Biostruc-annot-set)>
+
+<!-- sequences -->
+<!ELEMENT Biostruc-align_sequences (Seq-entry*)>
+
+<!ELEMENT Biostruc-align_seqalign (Seq-annot*)>
+
+<!ELEMENT Biostruc-align_style-dictionary (Cn3d-style-dictionary)>
+
+<!ELEMENT Biostruc-align_user-annotations (Cn3d-user-annotations)>
+
+<!-- display seq structure align only -->
+<!ELEMENT Biostruc-align-seq (
+        Biostruc-align-seq_sequences, 
+        Biostruc-align-seq_seqalign, 
+        Biostruc-align-seq_style-dictionary?, 
+        Biostruc-align-seq_user-annotations?)>
+
+<!-- sequences -->
+<!ELEMENT Biostruc-align-seq_sequences (Seq-entry*)>
+
+<!ELEMENT Biostruc-align-seq_seqalign (Seq-annot*)>
+
+<!ELEMENT Biostruc-align-seq_style-dictionary (Cn3d-style-dictionary)>
+
+<!ELEMENT Biostruc-align-seq_user-annotations (Cn3d-user-annotations)>
+
+<!-- display  structure seq added by yanli -->
+<!ELEMENT Biostruc-seq (
+        Biostruc-seq_structure, 
+        Biostruc-seq_sequences, 
+        Biostruc-seq_style-dictionary?, 
+        Biostruc-seq_user-annotations?)>
+
+<!ELEMENT Biostruc-seq_structure (Biostruc)>
+
+<!ELEMENT Biostruc-seq_sequences (Seq-entry*)>
+
+<!ELEMENT Biostruc-seq_style-dictionary (Cn3d-style-dictionary)>
+
+<!ELEMENT Biostruc-seq_user-annotations (Cn3d-user-annotations)>
+
+<!-- display blast alignment along with neighbor's structure added by yanli -->
+<!ELEMENT Biostruc-seqs (
+        Biostruc-seqs_structure, 
+        Biostruc-seqs_sequences, 
+        Biostruc-seqs_seqalign, 
+        Biostruc-seqs_style-dictionary?, 
+        Biostruc-seqs_user-annotations?)>
+
+<!ELEMENT Biostruc-seqs_structure (Biostruc)>
+
+<!-- sequences -->
+<!ELEMENT Biostruc-seqs_sequences (Seq-entry*)>
+
+<!ELEMENT Biostruc-seqs_seqalign (Seq-annot*)>
+
+<!ELEMENT Biostruc-seqs_style-dictionary (Cn3d-style-dictionary)>
+
+<!ELEMENT Biostruc-seqs_user-annotations (Cn3d-user-annotations)>
+
+
+<!ELEMENT Entrez-style %ENUM;>
+<!ATTLIST Entrez-style value (
+        docsum |
+        genbank |
+        genpept |
+        fasta |
+        asn1 |
+        graphic |
+        alignment |
+        globalview |
+        report |
+        medlars |
+        embl |
+        pdb |
+        kinemage
+        ) #REQUIRED >
+
+
+
+<!ELEMENT Entrez-general (
+        Entrez-general_title?, 
+        Entrez-general_data, 
+        Entrez-general_style, 
+        Entrez-general_location?)>
+
+<!ELEMENT Entrez-general_title (#PCDATA)>
+
+<!ELEMENT Entrez-general_data (
+        Entrez-general_data_ml | 
+        Entrez-general_data_prot | 
+        Entrez-general_data_nuc | 
+        Entrez-general_data_genome | 
+        Entrez-general_data_structure | 
+        Entrez-general_data_strucAnnot)>
+
+<!ELEMENT Entrez-general_data_ml (Medline-entry)>
+
+<!ELEMENT Entrez-general_data_prot (Seq-entry)>
+
+<!ELEMENT Entrez-general_data_nuc (Seq-entry)>
+
+<!ELEMENT Entrez-general_data_genome (Seq-entry)>
+
+<!ELEMENT Entrez-general_data_structure (Biostruc)>
+
+<!ELEMENT Entrez-general_data_strucAnnot (Biostruc-annot-set)>
+
+<!ELEMENT Entrez-general_style (Entrez-style)>
+
+<!ELEMENT Entrez-general_location (#PCDATA)>
+
diff --git a/dtd/NCBI_ObjPrt.dtd b/dtd/NCBI_ObjPrt.dtd
new file mode 100644
index 0000000..ae5196a
--- /dev/null
+++ b/dtd/NCBI_ObjPrt.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "objprt.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_ObjPrt.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_ObjPrt_module PUBLIC "-//NCBI//NCBI ObjPrt Module//EN" "NCBI_ObjPrt.mod.dtd">
+%NCBI_ObjPrt_module;
diff --git a/dtd/NCBI_ObjPrt.mod.dtd b/dtd/NCBI_ObjPrt.mod.dtd
new file mode 100644
index 0000000..23f916a
--- /dev/null
+++ b/dtd/NCBI_ObjPrt.mod.dtd
@@ -0,0 +1,133 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "objprt.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-ObjPrt"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+********************************************************************
+
+  Print Templates
+  James Ostell, 1993
+
+
+********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          PrintTemplate,
+          PrintTemplateSet -->
+<!-- ============================================ -->
+
+
+<!ELEMENT PrintTemplate (
+        PrintTemplate_name, 
+        PrintTemplate_labelfrom?, 
+        PrintTemplate_format)>
+
+<!-- name for this template -->
+<!ELEMENT PrintTemplate_name (TemplateName)>
+
+<!-- ASN.1 path to get label from -->
+<!ELEMENT PrintTemplate_labelfrom (#PCDATA)>
+
+<!ELEMENT PrintTemplate_format (PrintFormat)>
+
+
+<!ELEMENT TemplateName (#PCDATA)>
+
+
+<!ELEMENT PrintTemplateSet (PrintTemplate*)>
+
+
+<!ELEMENT PrintFormat (
+        PrintFormat_asn1, 
+        PrintFormat_label?, 
+        PrintFormat_prefix?, 
+        PrintFormat_suffix?, 
+        PrintFormat_form)>
+
+<!-- ASN.1 partial path for this -->
+<!ELEMENT PrintFormat_asn1 (#PCDATA)>
+
+<!-- printable label -->
+<!ELEMENT PrintFormat_label (#PCDATA)>
+
+<!ELEMENT PrintFormat_prefix (#PCDATA)>
+
+<!ELEMENT PrintFormat_suffix (#PCDATA)>
+<!-- Forms for various ASN.1 components -->
+<!ELEMENT PrintFormat_form (PrintForm)>
+
+<!-- Forms for various ASN.1 components -->
+<!ELEMENT PrintForm (
+        PrintForm_block | 
+        PrintForm_boolean | 
+        PrintForm_enum | 
+        PrintForm_text | 
+        PrintForm_use-template | 
+        PrintForm_user | 
+        PrintForm_null)>
+<!-- for SEQUENCE, SET -->
+<!ELEMENT PrintForm_block (PrintFormBlock)>
+
+<!ELEMENT PrintForm_boolean (PrintFormBoolean)>
+
+<!ELEMENT PrintForm_enum (PrintFormEnum)>
+
+<!ELEMENT PrintForm_text (PrintFormText)>
+
+<!ELEMENT PrintForm_use-template (TemplateName)>
+
+<!ELEMENT PrintForm_user (UserFormat)>
+
+<!-- rarely used -->
+<!ELEMENT PrintForm_null EMPTY>
+
+
+<!ELEMENT UserFormat (
+        UserFormat_printfunc, 
+        UserFormat_defaultfunc?)>
+
+<!ELEMENT UserFormat_printfunc (#PCDATA)>
+
+<!ELEMENT UserFormat_defaultfunc (#PCDATA)>
+
+<!-- for SEQUENCE, SET -->
+<!ELEMENT PrintFormBlock (
+        PrintFormBlock_separator?, 
+        PrintFormBlock_components)>
+
+<!ELEMENT PrintFormBlock_separator (#PCDATA)>
+
+<!ELEMENT PrintFormBlock_components (PrintFormat*)>
+
+
+<!ELEMENT PrintFormBoolean (
+        PrintFormBoolean_true?, 
+        PrintFormBoolean_false?)>
+
+<!ELEMENT PrintFormBoolean_true (#PCDATA)>
+
+<!ELEMENT PrintFormBoolean_false (#PCDATA)>
+
+
+<!ELEMENT PrintFormEnum (
+        PrintFormEnum_values?)>
+
+<!ELEMENT PrintFormEnum_values (PrintFormEnum_values_E*)>
+
+
+<!ELEMENT PrintFormEnum_values_E (#PCDATA)>
+
+
+<!ELEMENT PrintFormText (
+        PrintFormText_textfunc?)>
+
+<!ELEMENT PrintFormText_textfunc (#PCDATA)>
+
diff --git a/dtd/NCBI_Organism.dtd b/dtd/NCBI_Organism.dtd
new file mode 100644
index 0000000..b06e17e
--- /dev/null
+++ b/dtd/NCBI_Organism.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Organism.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
diff --git a/dtd/NCBI_Organism.mod.dtd b/dtd/NCBI_Organism.mod.dtd
new file mode 100644
index 0000000..9c36c43
--- /dev/null
+++ b/dtd/NCBI_Organism.mod.dtd
@@ -0,0 +1,226 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 07/07/2010 23:05:04
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Organism"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  NCBI Organism
+  by James Ostell, 1994
+  version 3.0
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Org-ref -->
+
+<!-- Elements referenced from other modules:
+          Dbtag FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+*** Org-ref ***********************************************
+*
+*  Reference to an organism
+*     defines only the organism.. lower levels of detail for biological
+*     molecules are provided by the Source object
+*
+-->
+<!ELEMENT Org-ref (
+        Org-ref_taxname?, 
+        Org-ref_common?, 
+        Org-ref_mod?, 
+        Org-ref_db?, 
+        Org-ref_syn?, 
+        Org-ref_orgname?)>
+
+<!-- preferred formal name -->
+<!ELEMENT Org-ref_taxname (#PCDATA)>
+
+<!-- common name -->
+<!ELEMENT Org-ref_common (#PCDATA)>
+
+<!-- unstructured modifiers -->
+<!ELEMENT Org-ref_mod (Org-ref_mod_E*)>
+
+
+<!ELEMENT Org-ref_mod_E (#PCDATA)>
+
+<!-- ids in taxonomic or culture dbases -->
+<!ELEMENT Org-ref_db (Dbtag*)>
+
+<!-- synonyms for taxname or common -->
+<!ELEMENT Org-ref_syn (Org-ref_syn_E*)>
+
+
+<!ELEMENT Org-ref_syn_E (#PCDATA)>
+
+<!ELEMENT Org-ref_orgname (OrgName)>
+
+
+<!ELEMENT OrgName (
+        OrgName_name?, 
+        OrgName_attrib?, 
+        OrgName_mod?, 
+        OrgName_lineage?, 
+        OrgName_gcode?, 
+        OrgName_mgcode?, 
+        OrgName_div?, 
+        OrgName_pgcode?)>
+
+<!ELEMENT OrgName_name (
+        OrgName_name_binomial | 
+        OrgName_name_virus | 
+        OrgName_name_hybrid | 
+        OrgName_name_namedhybrid | 
+        OrgName_name_partial)>
+
+<!-- genus/species type name -->
+<!ELEMENT OrgName_name_binomial (BinomialOrgName)>
+
+<!-- virus names are different -->
+<!ELEMENT OrgName_name_virus (#PCDATA)>
+
+<!-- hybrid between organisms -->
+<!ELEMENT OrgName_name_hybrid (MultiOrgName)>
+
+<!-- some hybrids have genus x species name -->
+<!ELEMENT OrgName_name_namedhybrid (BinomialOrgName)>
+
+<!-- when genus not known -->
+<!ELEMENT OrgName_name_partial (PartialOrgName)>
+
+<!-- attribution of name -->
+<!ELEMENT OrgName_attrib (#PCDATA)>
+
+<!ELEMENT OrgName_mod (OrgMod*)>
+
+<!-- lineage with semicolon separators -->
+<!ELEMENT OrgName_lineage (#PCDATA)>
+
+<!-- genetic code (see CdRegion) -->
+<!ELEMENT OrgName_gcode (%INTEGER;)>
+
+<!-- mitochondrial genetic code -->
+<!ELEMENT OrgName_mgcode (%INTEGER;)>
+
+<!-- GenBank division code -->
+<!ELEMENT OrgName_div (#PCDATA)>
+
+<!-- plastid genetic code -->
+<!ELEMENT OrgName_pgcode (%INTEGER;)>
+
+
+<!ELEMENT OrgMod (
+        OrgMod_subtype, 
+        OrgMod_subname, 
+        OrgMod_attrib?)>
+
+<!ELEMENT OrgMod_subtype (%INTEGER;)>
+
+<!--
+    dosage	-  chromosome dosage of hybrid
+    nat-host	-  natural host of this specimen
+    gb-acronym	-  used by taxonomy database
+    gb-anamorph	-  used by taxonomy database
+    gb-synonym	-  used by taxonomy database
+    other	-  ASN5: old-name (254) will be added to next spec
+-->
+<!ATTLIST OrgMod_subtype value (
+        strain |
+        substrain |
+        type |
+        subtype |
+        variety |
+        serotype |
+        serogroup |
+        serovar |
+        cultivar |
+        pathovar |
+        chemovar |
+        biovar |
+        biotype |
+        group |
+        subgroup |
+        isolate |
+        common |
+        acronym |
+        dosage |
+        nat-host |
+        sub-species |
+        specimen-voucher |
+        authority |
+        forma |
+        forma-specialis |
+        ecotype |
+        synonym |
+        anamorph |
+        teleomorph |
+        breed |
+        gb-acronym |
+        gb-anamorph |
+        gb-synonym |
+        culture-collection |
+        bio-material |
+        metagenome-source |
+        old-lineage |
+        old-name |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT OrgMod_subname (#PCDATA)>
+
+<!-- attribution/source of name -->
+<!ELEMENT OrgMod_attrib (#PCDATA)>
+
+
+<!ELEMENT BinomialOrgName (
+        BinomialOrgName_genus, 
+        BinomialOrgName_species?, 
+        BinomialOrgName_subspecies?)>
+
+<!-- required -->
+<!ELEMENT BinomialOrgName_genus (#PCDATA)>
+
+<!-- species required if subspecies used -->
+<!ELEMENT BinomialOrgName_species (#PCDATA)>
+
+<!ELEMENT BinomialOrgName_subspecies (#PCDATA)>
+
+<!-- the first will be used to assign division -->
+<!ELEMENT MultiOrgName (OrgName*)>
+
+<!-- when we don't know the genus -->
+<!ELEMENT PartialOrgName (TaxElement*)>
+
+
+<!ELEMENT TaxElement (
+        TaxElement_fixed-level, 
+        TaxElement_level?, 
+        TaxElement_name)>
+
+<!ELEMENT TaxElement_fixed-level (%INTEGER;)>
+
+<!--
+    other	-  level must be set in string
+-->
+<!ATTLIST TaxElement_fixed-level value (
+        other |
+        family |
+        order |
+        class
+        ) #IMPLIED >
+
+
+<!ELEMENT TaxElement_level (#PCDATA)>
+
+<!ELEMENT TaxElement_name (#PCDATA)>
+
diff --git a/dtd/NCBI_PCAssay.dtd b/dtd/NCBI_PCAssay.dtd
new file mode 100644
index 0000000..7b35bb2
--- /dev/null
+++ b/dtd/NCBI_PCAssay.dtd
@@ -0,0 +1,38 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pcassay.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 01/17/2012 23:05:10
+     ============================================ -->
+
+<!-- NCBI_PCAssay.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_PCAssay_module PUBLIC "-//NCBI//NCBI PCAssay Module//EN" "NCBI_PCAssay.mod.dtd">
+%NCBI_PCAssay_module;
+
+<!ENTITY % NCBI_PCSubstance_module PUBLIC "-//NCBI//NCBI PCSubstance Module//EN" "NCBI_PCSubstance.mod.dtd">
+%NCBI_PCSubstance_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
diff --git a/dtd/NCBI_PCAssay.mod.dtd b/dtd/NCBI_PCAssay.mod.dtd
new file mode 100644
index 0000000..020ab07
--- /dev/null
+++ b/dtd/NCBI_PCAssay.mod.dtd
@@ -0,0 +1,1006 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pcassay.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 01/17/2012 23:05:10
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-PCAssay"
+================================================= -->
+
+<!--
+ $Id: pcassay.asn 282508 2011-05-11 22:47:31Z ywang $
+ ===========================================================================
+
+                            PUBLIC DOMAIN NOTICE
+               National Center for Biotechnology Information
+
+  This software/database is a "United States Government Work" under the
+  terms of the United States Copyright Act.  It was written as part of
+  the author's official duties as a United States Government employee and
+  thus cannot be copyrighted.  This software/database is freely available
+  to the public for use. The National Library of Medicine and the U.S.
+  Government have not placed any restriction on its use or reproduction.
+
+  Although all reasonable efforts have been taken to ensure the accuracy
+  and reliability of the software and data, the NLM and the U.S.
+  Government do not and cannot warrant the performance or results that
+  may be obtained by using this software or data. The NLM and the U.S.
+  Government disclaim all warranties, express or implied, including
+  warranties of performance, merchantability or fitness for any particular
+  purpose.
+
+  Please cite the author in any work or product based on this material.
+
+ ===========================================================================
+
+ Authors:  NCBI Structure Group
+
+ File Description:
+      ASN.1 definitions for PubChem biological assay data database
+
+ ===========================================================================
+-->
+
+<!-- Elements referenced from other modules:
+          Pub FROM NCBI-Pub,
+          BioSource FROM NCBI-BioSource,
+          Date,
+          Object-id FROM NCBI-General,
+          PC-ID,
+          PC-Source,
+          PC-XRefData FROM NCBI-PCSubstance -->
+<!-- ============================================ -->
+
+<!--
+ EXPORTS ;
+ Container for multiple Assay Data Submissions
+-->
+<!ELEMENT PC-AssayContainer (PC-AssaySubmit*)>
+
+<!-- Container for Data Depositions and Assay Definitions -->
+<!ELEMENT PC-AssaySubmit (
+        PC-AssaySubmit_assay, 
+        PC-AssaySubmit_data?, 
+        PC-AssaySubmit_revoke?)>
+<!-- Assay Description or pre-existing Identifier -->
+<!ELEMENT PC-AssaySubmit_assay (
+        PC-AssaySubmit_assay_aid | 
+        PC-AssaySubmit_assay_aid-source | 
+        PC-AssaySubmit_assay_descr | 
+        PC-AssaySubmit_assay_aidver)>
+
+<!--   Assay Identifier -->
+<!ELEMENT PC-AssaySubmit_assay_aid (%INTEGER;)>
+
+<!--   External Assay Identifier -->
+<!ELEMENT PC-AssaySubmit_assay_aid-source (PC-Source)>
+
+<!--   Assay Description (new or updated) -->
+<!ELEMENT PC-AssaySubmit_assay_descr (PC-AssayDescription)>
+
+<!--   Assay Identifier/Version (for internal use) -->
+<!ELEMENT PC-AssaySubmit_assay_aidver (PC-ID)>
+
+<!-- Assay Data Deposition (vector) -->
+<!ELEMENT PC-AssaySubmit_data (PC-AssayResults*)>
+
+<!-- List of SID's whose data is to be suppressed -->
+<!ELEMENT PC-AssaySubmit_revoke (PC-AssaySubmit_revoke_E*)>
+
+
+<!ELEMENT PC-AssaySubmit_revoke_E (%INTEGER;)>
+
+<!--
+ Container for multiple Assay Result Sets
+ PC-AssayResultsSet ::= SEQUENCE OF PC-AssayResults
+ Assay Results provided for a given Substance tested, with respect to the results types defined in the 
+   referenced Assay Description
+-->
+<!ELEMENT PC-AssayResults (
+        PC-AssayResults_sid, 
+        PC-AssayResults_sid-source?, 
+        PC-AssayResults_version?, 
+        PC-AssayResults_comment?, 
+        PC-AssayResults_outcome?, 
+        PC-AssayResults_rank?, 
+        PC-AssayResults_data?, 
+        PC-AssayResults_url?, 
+        PC-AssayResults_xref?, 
+        PC-AssayResults_date?)>
+
+<!--
+ Internal/External Tracking Information
+ Tested Substance ID/Version  [Either valid ID or, 
+   if "sid-source" is used, this is a "0" value]
+   Note: A valid ID is greater than "0"
+-->
+<!ELEMENT PC-AssayResults_sid (%INTEGER;)>
+
+<!--
+ External Identifier for this Substance
+   Note: May be used in-lieu of "sid"
+   Note: This is non-optional if "sid" is "0"
+-->
+<!ELEMENT PC-AssayResults_sid-source (PC-Source)>
+
+<!--
+ Version identifier for this AID-SID Result
+   Note: Incoming data should set this to be "0"
+-->
+<!ELEMENT PC-AssayResults_version (%INTEGER;)>
+
+<!--
+ Data Annotation/Qualifier and URL to further Depositor Information
+ Annotation or qualifier for this Result
+-->
+<!ELEMENT PC-AssayResults_comment (#PCDATA)>
+<!--
+ Assay Result Data for this Sample
+   Note: Users need populate only those "tid"s, for which there is data, in any order.
+ Assay Outcome
+-->
+<!ELEMENT PC-AssayResults_outcome (%INTEGER;)>
+
+<!--
+    inactive	-    Substance is considered Inactive
+    active	-    Substance is considered Active
+    inconclusive	-    Substance is Inconclusive
+    unspecified	-    Substance Outcome is Unspecified
+    probe	-    Substance Outcome is Unspecified
+-->
+<!ATTLIST PC-AssayResults_outcome value (
+        inactive |
+        active |
+        inconclusive |
+        unspecified |
+        probe
+        ) #IMPLIED >
+
+
+<!--
+ Rank of Assay Outcome (for result ordering)
+   Note: Larger numbers are more active
+-->
+<!ELEMENT PC-AssayResults_rank (%INTEGER;)>
+
+<!-- Assay Data Reported for this SID (vector) -->
+<!ELEMENT PC-AssayResults_data (PC-AssayData*)>
+
+<!-- Depositor provided URL for this Result -->
+<!ELEMENT PC-AssayResults_url (#PCDATA)>
+
+<!--
+ annotated Cross-Reference Information
+ to be removed, 
+ instead regulard TID will be generated
+ which are then annotated by xref type
+-->
+<!ELEMENT PC-AssayResults_xref (PC-AnnotatedXRef*)>
+
+<!-- Pubchem Release Date -->
+<!ELEMENT PC-AssayResults_date (Date)>
+
+<!-- Assay Readouts/Results for a Tested Substance -->
+<!ELEMENT PC-AssayData (
+        PC-AssayData_tid, 
+        PC-AssayData_value)>
+
+<!--
+ Assay Result Field Type ID (TID)
+   Note: Result Field ID's must be greater than "0"
+-->
+<!ELEMENT PC-AssayData_tid (%INTEGER;)>
+<!-- Assay Result, must be the same type as defined for TID -->
+<!ELEMENT PC-AssayData_value (
+        PC-AssayData_value_ival | 
+        PC-AssayData_value_fval | 
+        PC-AssayData_value_bval | 
+        PC-AssayData_value_sval)>
+
+<!ELEMENT PC-AssayData_value_ival (%INTEGER;)>
+
+<!ELEMENT PC-AssayData_value_fval (%REAL;)>
+
+<!ELEMENT PC-AssayData_value_bval EMPTY>
+<!ATTLIST PC-AssayData_value_bval value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT PC-AssayData_value_sval (#PCDATA)>
+
+<!--
+ Assay Description provided by an Organization that describes the assay/protocol performed and defines the 
+   measured end-points and parameters to be stored.  An Assay Description is not a database table.  You can 
+   define as many Result Definitions as needed and they need not be used by all Substances tested.
+ Assay Descriptions can be modified on both description text and Result Definitions after initial submission
+ as desired, and such udpates will be tracked in PubChem
+-->
+<!ELEMENT PC-AssayDescription (
+        PC-AssayDescription_aid, 
+        PC-AssayDescription_aid-source?, 
+        PC-AssayDescription_name, 
+        PC-AssayDescription_description?, 
+        PC-AssayDescription_protocol?, 
+        PC-AssayDescription_comment?, 
+        PC-AssayDescription_xref?, 
+        PC-AssayDescription_results?, 
+        PC-AssayDescription_pub?, 
+        PC-AssayDescription_revision?, 
+        PC-AssayDescription_target?, 
+        PC-AssayDescription_activity-outcome-method?, 
+        PC-AssayDescription_dr?, 
+        PC-AssayDescription_substance-type?, 
+        PC-AssayDescription_grant-number?, 
+        PC-AssayDescription_project-category?, 
+        PC-AssayDescription_is-panel?, 
+        PC-AssayDescription_assay-group?, 
+        PC-AssayDescription_panel-info?, 
+        PC-AssayDescription_is-mlp-late-stage?, 
+        PC-AssayDescription_categorized-comment?)>
+
+<!--
+ Internal/External Tracking Information
+ Assay Description ID/Version  [Either valid ID
+   or, if "aid-source" is used, a "0" dummy value]
+   Note: Version is for internal use (only?)
+   Note: A valid ID is greater than "0"
+-->
+<!ELEMENT PC-AssayDescription_aid (PC-ID)>
+
+<!--
+ External Identifier for this Assay Description
+   Note: May be used in-lieu of "aid"
+   Note: This is non-optional if "aid" ID is "0"
+-->
+<!ELEMENT PC-AssayDescription_aid-source (PC-Source)>
+
+<!--
+ Assay Description Information
+ Short Assay Name (for display purposes)
+-->
+<!ELEMENT PC-AssayDescription_name (#PCDATA)>
+
+<!-- Description of Assay -->
+<!ELEMENT PC-AssayDescription_description (PC-AssayDescription_description_E*)>
+
+
+<!ELEMENT PC-AssayDescription_description_E (#PCDATA)>
+
+<!-- Procedure used to generate results -->
+<!ELEMENT PC-AssayDescription_protocol (PC-AssayDescription_protocol_E*)>
+
+
+<!ELEMENT PC-AssayDescription_protocol_E (#PCDATA)>
+
+<!-- Comments or additional information -->
+<!ELEMENT PC-AssayDescription_comment (PC-AssayDescription_comment_E*)>
+
+
+<!ELEMENT PC-AssayDescription_comment_E (#PCDATA)>
+
+<!-- Annotated Cross-Reference Information -->
+<!ELEMENT PC-AssayDescription_xref (PC-AnnotatedXRef*)>
+
+<!--
+ Allowed Assay Result Types
+ Result Definitions (vector)
+-->
+<!ELEMENT PC-AssayDescription_results (PC-ResultType*)>
+
+<!--
+ Additional Information
+ Depositor provided publications for this assay
+-->
+<!ELEMENT PC-AssayDescription_pub (Pub*)>
+
+<!-- Revision identifier for textual description -->
+<!ELEMENT PC-AssayDescription_revision (%INTEGER;)>
+
+<!-- Target information -->
+<!ELEMENT PC-AssayDescription_target (PC-AssayTargetInfo*)>
+<!-- Assay Outcome Qualifier -->
+<!ELEMENT PC-AssayDescription_activity-outcome-method (%INTEGER;)>
+
+<!--
+    other	-    All Other Type
+    screening	-    Primary Screen Assay
+    confirmatory	-    Confirmatory Assay
+    summary	-    Probe Summary Assay
+-->
+<!ATTLIST PC-AssayDescription_activity-outcome-method value (
+        other |
+        screening |
+        confirmatory |
+        summary
+        ) #IMPLIED >
+
+
+<!-- Dose-Response Attribution -->
+<!ELEMENT PC-AssayDescription_dr (PC-AssayDRAttr*)>
+
+<!-- to distinguish the type of substance used in the screening -->
+<!ELEMENT PC-AssayDescription_substance-type (%INTEGER;)>
+<!ATTLIST PC-AssayDescription_substance-type value (
+        small-molecule |
+        nucleotide |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ Grant and project category information
+ grant proposal number
+ required for 'MLSCN' & 'MLPCN' projects
+-->
+<!ELEMENT PC-AssayDescription_grant-number (PC-AssayDescription_grant-number_E*)>
+
+
+<!ELEMENT PC-AssayDescription_grant-number_E (#PCDATA)>
+
+<!--
+ to distinguish projects funded through MLSCN, MLPCN or other
+ mlscn: assay depositions from MLSCN screen center
+ mlpcn: assay depositions from MLPCN screen center
+ mlscn-ap: assay depositions from MLSCN assay provider
+ mlpcn-ap: assay depositions from MLPCN assay provider
+ required for 'MLSCN' & 'MLPCN' projects
+ journal-article: to be deprecated; replaced by option 7,8 & 9 to better characterize data from literature 
+ literature-extracted: data from literature, extracted by curators
+ literature-author: data from literature, submitted by author of articles
+ literature-publisher: data from literature, submitted by journals/publishers
+ rnaigi: RNAi screenings from RNAi Global Initiative 
+-->
+<!ELEMENT PC-AssayDescription_project-category (%INTEGER;)>
+
+<!--
+    journal-article	-  to be deprecated
+-->
+<!ATTLIST PC-AssayDescription_project-category value (
+        mlscn |
+        mlpcn |
+        mlscn-ap |
+        mlpcn-ap |
+        journal-article |
+        assay-vendor |
+        literature-extracted |
+        literature-author |
+        literature-publisher |
+        rnaigi |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ annotation to indicate whether an assay is a panel, e.g. containing multiple components, or belongs to a group    
+ annotation for panel assay, e.g. to indicate that this assay
+ contains multiple members/components. 
+ A panel assay can be one assay reporting readouts for
+ many targets, or reporting readouts for different
+ cell lines, or different organisms
+ examples such as bioassay containing kinase profiling data
+ or bioassay containing cytoxicity data for multiple cell lines
+ or bioassay containing screening data from different stages, 
+ such as primary screening, follow ups
+-->
+<!ELEMENT PC-AssayDescription_is-panel EMPTY>
+<!ATTLIST PC-AssayDescription_is-panel value ( true | false ) #REQUIRED >
+
+
+<!--
+ annotation for assay gruop information, e.g. this 
+ assay belongs to a group of assay associated by 
+ a unique name, e.g. the value assigned to 'assay-group',  
+ assays belonging to this group can be 
+ retrieved using this unique name
+ it is depositor's responsibility to make the name 
+ distinct if necessary
+ this can be used as the mechanism to specify 'related bioassays'
+ before hand so it is not necessary to update the descriptions of
+ related assays when new group member submitted to PubChem 
+-->
+<!ELEMENT PC-AssayDescription_assay-group (PC-AssayDescription_assay-group_E*)>
+
+
+<!ELEMENT PC-AssayDescription_assay-group_E (#PCDATA)>
+
+<!--
+ for 'panel' type of bioassay only
+ store assay panel member information
+-->
+<!ELEMENT PC-AssayDescription_panel-info (PC-AssayPanel)>
+
+<!-- verification for 'late-stage-data' deposition -->
+<!ELEMENT PC-AssayDescription_is-mlp-late-stage EMPTY>
+<!ATTLIST PC-AssayDescription_is-mlp-late-stage value ( true | false ) #REQUIRED >
+
+
+<!-- to report categorized description/comment by associating with a category title  -->
+<!ELEMENT PC-AssayDescription_categorized-comment (PC-CategorizedComment*)>
+
+<!--
+ Description for Panel Assay
+ Describe general information about the panel, and link to information for each panel member 
+-->
+<!ELEMENT PC-AssayPanel (
+        PC-AssayPanel_name, 
+        PC-AssayPanel_descr?, 
+        PC-AssayPanel_member?)>
+
+<!-- short name for the panel, such as 'Kinase Profiling' -->
+<!ELEMENT PC-AssayPanel_name (#PCDATA)>
+
+<!-- short description of this panel -->
+<!ELEMENT PC-AssayPanel_descr (#PCDATA)>
+
+<!-- store panel member information -->
+<!ELEMENT PC-AssayPanel_member (PC-AssayPanelMember*)>
+
+<!-- Specific information about each panel member(or component), such as target, cell line name, cross-reference ...  -->
+<!ELEMENT PC-AssayPanelMember (
+        PC-AssayPanelMember_mid, 
+        PC-AssayPanelMember_name?, 
+        PC-AssayPanelMember_description?, 
+        PC-AssayPanelMember_protocol?, 
+        PC-AssayPanelMember_comment?, 
+        PC-AssayPanelMember_target?, 
+        PC-AssayPanelMember_xref?, 
+        PC-AssayPanelMember_activity-outcome-method?, 
+        PC-AssayPanelMember_dr?, 
+        PC-AssayPanelMember_categorized-comment?)>
+
+<!--
+ ID for panel member 
+ if a kinase panel with 300 kinases, ID will range from 1 to 300  
+ TIDs of the same panel member to be grouped based on panel member ID
+-->
+<!ELEMENT PC-AssayPanelMember_mid (%INTEGER;)>
+
+<!-- short name for this panel member  -->
+<!ELEMENT PC-AssayPanelMember_name (#PCDATA)>
+
+<!--
+ description about specifics of this panel member
+ such as about cell line, or target information 
+-->
+<!ELEMENT PC-AssayPanelMember_description (#PCDATA)>
+
+<!-- Specific procedure used to generate results for the panel member -->
+<!ELEMENT PC-AssayPanelMember_protocol (PC-AssayPanelMember_protocol_E*)>
+
+
+<!ELEMENT PC-AssayPanelMember_protocol_E (#PCDATA)>
+
+<!-- Comments or additional information -->
+<!ELEMENT PC-AssayPanelMember_comment (PC-AssayPanelMember_comment_E*)>
+
+
+<!ELEMENT PC-AssayPanelMember_comment_E (#PCDATA)>
+
+<!-- often provided for profiling assays across protein families -->
+<!ELEMENT PC-AssayPanelMember_target (PC-AssayTargetInfo*)>
+
+<!-- annotated Cross-Reference Information -->
+<!ELEMENT PC-AssayPanelMember_xref (PC-AnnotatedXRef*)>
+<!-- Assay Outcome Qualifier -->
+<!ELEMENT PC-AssayPanelMember_activity-outcome-method (%INTEGER;)>
+
+<!--
+    other	-    All Other Type
+    screening	-    Primary Screen Assay
+    confirmatory	-    Confirmatory Assay
+    summary	-    Probe Summary Assay
+-->
+<!ATTLIST PC-AssayPanelMember_activity-outcome-method value (
+        other |
+        screening |
+        confirmatory |
+        summary
+        ) #IMPLIED >
+
+
+<!-- Dose-Response Attribution within the panel member -->
+<!ELEMENT PC-AssayPanelMember_dr (PC-AssayDRAttr*)>
+
+<!-- to report categorized description/comment by associating with a category title  -->
+<!ELEMENT PC-AssayPanelMember_categorized-comment (PC-CategorizedComment*)>
+
+<!--
+ Definition for Categorized description/comment 
+ This field is added to provide flexibility for depositors to present textual description/comments in a desirable way 
+ and to facilitate information validation by the depositor and data exchange with PubChem 
+-->
+<!ELEMENT PC-CategorizedComment (
+        PC-CategorizedComment_title, 
+        PC-CategorizedComment_comment)>
+
+<!-- title for the description/comment -->
+<!ELEMENT PC-CategorizedComment_title (#PCDATA)>
+
+<!-- description/comment content -->
+<!ELEMENT PC-CategorizedComment_comment (PC-CategorizedComment_comment_E*)>
+
+
+<!ELEMENT PC-CategorizedComment_comment_E (#PCDATA)>
+
+<!--
+  Assay Dose-response attribute information used to define a set of readouts
+    as being part of a dose-response curve (for curve plotting/analysis)
+-->
+<!ELEMENT PC-AssayDRAttr (
+        PC-AssayDRAttr_id, 
+        PC-AssayDRAttr_descr?, 
+        PC-AssayDRAttr_dn?, 
+        PC-AssayDRAttr_rn?, 
+        PC-AssayDRAttr_type?)>
+
+<!--
+ Unique dose-response test set identifier
+   Note: A valid ID is greater than "0"
+-->
+<!ELEMENT PC-AssayDRAttr_id (%INTEGER;)>
+
+<!-- Dose-Response Curve Description (used as curve title) -->
+<!ELEMENT PC-AssayDRAttr_descr (#PCDATA)>
+
+<!-- Dose Axis Description (used as axis name) -->
+<!ELEMENT PC-AssayDRAttr_dn (#PCDATA)>
+
+<!-- Response Axis Description (used as axis name) -->
+<!ELEMENT PC-AssayDRAttr_rn (#PCDATA)>
+
+<!ELEMENT PC-AssayDRAttr_type (%INTEGER;)>
+
+<!--
+    experimental	-  dose-response data points measured directly by experiment
+    calculated	-  dose-response data points derived from fitted curve
+-->
+<!ATTLIST PC-AssayDRAttr_type value (
+        experimental |
+        calculated
+        ) #IMPLIED >
+
+
+<!--
+ Molecular target information provides by organization describes the functionality of the target, 
+ facilitates the linking between PubChem bioassays, and the linking between target molecule to other NCBI resources
+-->
+<!ELEMENT PC-AssayTargetInfo (
+        PC-AssayTargetInfo_name, 
+        PC-AssayTargetInfo_mol-id, 
+        PC-AssayTargetInfo_molecule-type?, 
+        PC-AssayTargetInfo_organism?, 
+        PC-AssayTargetInfo_descr?, 
+        PC-AssayTargetInfo_comment?)>
+
+<!-- Molecular name of target -->
+<!ELEMENT PC-AssayTargetInfo_name (#PCDATA)>
+
+<!-- NCBI database identifier of the target molecule -->
+<!ELEMENT PC-AssayTargetInfo_mol-id (%INTEGER;)>
+<!-- Assay Target Type -->
+<!ELEMENT PC-AssayTargetInfo_molecule-type (%INTEGER;)>
+
+<!--
+    protein	-  mol-id: NCBI Protein GI 
+    dna	-  mol-id: NCBI Nucleotide GI
+    rna	-  mol-id: NCBI Nucleotide GI
+    gene	-  mol-id: NCBI Gene ID
+    biosystem	-  mol-id: NCBI BioSystems ID
+-->
+<!ATTLIST PC-AssayTargetInfo_molecule-type value (
+        protein |
+        dna |
+        rna |
+        gene |
+        biosystem |
+        other
+        ) #IMPLIED >
+
+
+<!-- Target Organism -->
+<!ELEMENT PC-AssayTargetInfo_organism (BioSource)>
+
+<!-- Target Description  (e.g., cellular functionality and location) -->
+<!ELEMENT PC-AssayTargetInfo_descr (#PCDATA)>
+
+<!-- Comments or Additional Information -->
+<!ELEMENT PC-AssayTargetInfo_comment (PC-AssayTargetInfo_comment_E*)>
+
+
+<!ELEMENT PC-AssayTargetInfo_comment_E (#PCDATA)>
+
+<!-- Annotated Cross-Reference (XRef) Information to allow the XRef to be qualified, as to its meaning or context -->
+<!ELEMENT PC-AnnotatedXRef (
+        PC-AnnotatedXRef_xref, 
+        PC-AnnotatedXRef_comment?, 
+        PC-AnnotatedXRef_type?)>
+
+<!-- Cross-Reference Information -->
+<!ELEMENT PC-AnnotatedXRef_xref (PC-XRefData)>
+
+<!-- Annotation qualifier describing Cross-Reference meaning -->
+<!ELEMENT PC-AnnotatedXRef_comment (#PCDATA)>
+
+<!ELEMENT PC-AnnotatedXRef_type (%INTEGER;)>
+
+<!--
+    pcit	-  primary PMID/citation directly associated with the current assay data 
+    pgene	-  gene encoding the protein assay target
+-->
+<!ATTLIST PC-AnnotatedXRef_type value (
+        pcit |
+        pgene
+        ) #IMPLIED >
+
+
+<!-- Definition of Allowed Result Types for a given Assay -->
+<!ELEMENT PC-ResultType (
+        PC-ResultType_tid, 
+        PC-ResultType_name, 
+        PC-ResultType_description?, 
+        PC-ResultType_type, 
+        PC-ResultType_constraints?, 
+        PC-ResultType_unit?, 
+        PC-ResultType_sunit?, 
+        PC-ResultType_transform?, 
+        PC-ResultType_stransform?, 
+        PC-ResultType_tc?, 
+        PC-ResultType_ac?, 
+        PC-ResultType_panel-info?, 
+        PC-ResultType_annot?)>
+
+<!--
+ Tracking or Description Information
+ Assay Result Field Type ID (TID)
+-->
+<!ELEMENT PC-ResultType_tid (%INTEGER;)>
+
+<!-- Result Field Name (short name for display) -->
+<!ELEMENT PC-ResultType_name (#PCDATA)>
+
+<!-- Result Field Description -->
+<!ELEMENT PC-ResultType_description (PC-ResultType_description_E*)>
+
+
+<!ELEMENT PC-ResultType_description_E (#PCDATA)>
+<!--
+ Result Data Type and Validation Information
+ Result Data Type
+-->
+<!ELEMENT PC-ResultType_type (%INTEGER;)>
+<!ATTLIST PC-ResultType_type value (
+        float |
+        int |
+        bool |
+        string
+        ) #IMPLIED >
+
+<!--
+ Allowed Values, used for validating incoming data
+ If type is "float"
+-->
+<!ELEMENT PC-ResultType_constraints (
+        PC-ResultType_constraints_fset | 
+        PC-ResultType_constraints_fmin | 
+        PC-ResultType_constraints_fmax | 
+        PC-ResultType_constraints_frange | 
+        PC-ResultType_constraints_iset | 
+        PC-ResultType_constraints_imin | 
+        PC-ResultType_constraints_imax | 
+        PC-ResultType_constraints_irange | 
+        PC-ResultType_constraints_sset)>
+
+<!--   Allowed values must be equal to one of these -->
+<!ELEMENT PC-ResultType_constraints_fset (PC-ResultType_constraints_fset_E*)>
+
+
+<!ELEMENT PC-ResultType_constraints_fset_E (%REAL;)>
+
+<!--   Allowed values (x) must be [ fmin <= x ] -->
+<!ELEMENT PC-ResultType_constraints_fmin (%REAL;)>
+
+<!--   Allowed values (x) must be [ x <= fmax ] -->
+<!ELEMENT PC-ResultType_constraints_fmax (%REAL;)>
+
+<!--   Minimum/Maximum Range [ min <= x <= max ] -->
+<!ELEMENT PC-ResultType_constraints_frange (PC-RealMinMax)>
+
+<!--
+ If type is "int"
+   Allowed values must be equal to one of these
+-->
+<!ELEMENT PC-ResultType_constraints_iset (PC-ResultType_constraints_iset_E*)>
+
+
+<!ELEMENT PC-ResultType_constraints_iset_E (%INTEGER;)>
+
+<!--   Allowed values (x) must be [ imin <= x ] -->
+<!ELEMENT PC-ResultType_constraints_imin (%INTEGER;)>
+
+<!--   Allowed values (x) must be [ x <= imax ] -->
+<!ELEMENT PC-ResultType_constraints_imax (%INTEGER;)>
+
+<!--   Minimum/Maximum Range [ min <= x <= max ] -->
+<!ELEMENT PC-ResultType_constraints_irange (PC-IntegerMinMax)>
+
+<!--
+ If type is "string"
+   Allowed values must be equal to one of these
+-->
+<!ELEMENT PC-ResultType_constraints_sset (PC-ResultType_constraints_sset_E*)>
+
+
+<!ELEMENT PC-ResultType_constraints_sset_E (#PCDATA)>
+<!--
+ Unit information provides the units for the values reported for this TID.  For example, if the values 
+   reported for this TID are a concentration, e.g., micro-molar, setting the unit "um" allows PubChem to 
+   know that the value, e.g., "1.3", is actually "1.3 uM".  This also allows PubChem to properly report the 
+   units when displaying the reported values for this TID.  If the enumerated units provided below are 
+   insufficient, you may represent the units as a string in the optional "sunit" field (see below).
+ Units for Value
+-->
+<!ELEMENT PC-ResultType_unit (%INTEGER;)>
+
+<!--
+    ppt	-  Parts per Thousand
+    ppm	-  Parts per Million
+    ppb	-  Parts per Billion
+    mm	-  milliM
+    um	-  microM
+    nm	-  nanoM
+    pm	-  picoM
+    fm	-  femtoM
+    mgml	-  milligrams per mL
+    ugml	-  micrograms per mL
+    ngml	-  nanograms per mL
+    pgml	-  picograms per mL
+    fgml	-  femtograms per mL
+    m	-  Molar
+    percent	-  Percent
+    ratio	-  Ratio
+    sec	-  Seconds
+    rsec	-  Reciprocal Seconds
+    min	-  Minutes
+    rmin	-  Reciprocal Minutes
+    day	-  Days
+    rday	-  Reciprocal Days
+    ml-min-kg	-  milliliter / minute / kilogram
+    l-kg	-  liter / kilogram
+    hr-ng-ml	-  hour * nanogram / milliliter
+    cm-sec	-  centimeter / second
+    mg-kg	-  milligram / kilogram
+-->
+<!ATTLIST PC-ResultType_unit value (
+        ppt |
+        ppm |
+        ppb |
+        mm |
+        um |
+        nm |
+        pm |
+        fm |
+        mgml |
+        ugml |
+        ngml |
+        pgml |
+        fgml |
+        m |
+        percent |
+        ratio |
+        sec |
+        rsec |
+        min |
+        rmin |
+        day |
+        rday |
+        ml-min-kg |
+        l-kg |
+        hr-ng-ml |
+        cm-sec |
+        mg-kg |
+        none |
+        unspecified
+        ) #IMPLIED >
+
+
+<!--
+ ATTENTION: sunit field is DEPRECATED. It is no longer
+            supported and remains for legacy data only.
+ Unit Type (as a String)
+-->
+<!ELEMENT PC-ResultType_sunit (#PCDATA)>
+<!--
+ Value Transform information qualifies the values reported for this TID.  For example, if the values
+   reported for this TID are "-Log10 GI50", you may want to consider setting
+   the "nlog" value below.  In doing so, PubChem would know that the value, e.g., "5.0" 
+   is actually "1.0e-5".  If the transformation applied is not listed, you may represent
+   this transformation as a string in the "stransform" (see below) for eventual inclusion 
+   in the enumerated transform list below.
+
+
+ ATTENTION: transform field is DEPRECATED. It is no longer
+            supported and remains for legacy data only.
+ Value Type Details
+-->
+<!ELEMENT PC-ResultType_transform (%INTEGER;)>
+
+<!--
+    linear	-  Linear Scale (x)
+    ln	-  Natural Log Scale (ln x)
+    log	-  Log Base 10 Scale (log10 x)
+    reciprocal	-  Reciprocal Scale (1/x)
+    negative	-  Negative Linear Scale (-x)
+    nlog	-  Negative Log Base 10 Scale (-log10 x)
+    nln	-  Negative Natural Log Scane (-ln x)
+-->
+<!ATTLIST PC-ResultType_transform value (
+        linear |
+        ln |
+        log |
+        reciprocal |
+        negative |
+        nlog |
+        nln
+        ) #IMPLIED >
+
+
+<!--
+ ATTENTION: stransform field is DEPRECATED. It is no longer
+            supported and remains for legacy data only.
+ Value Transform Type (as a String)
+-->
+<!ELEMENT PC-ResultType_stransform (#PCDATA)>
+
+<!-- Tested concentration attribute -->
+<!ELEMENT PC-ResultType_tc (PC-ConcentrationAttr)>
+
+<!--
+ if true, indicates that this TID field 
+ provides active concentration summary by 
+ reporting the concentration which produces 
+ 50% of the maximum possible biological response
+ such as IC50, EC50, AC50, GI50 etc. 
+ or by reporting constant parameters such as Ki, 
+ that based on which the activity outcome in this assay is called   
+-->
+<!ELEMENT PC-ResultType_ac EMPTY>
+<!ATTLIST PC-ResultType_ac value ( true | false ) #REQUIRED >
+
+
+<!--
+ needed for panel assay only
+ each panel member may have a number of TID columns reported
+ such TIDs are grouped by panel member ID, see PC-AssayPanelMemberInfo
+-->
+<!ELEMENT PC-ResultType_panel-info (PC-AssayPanelTestResult)>
+
+<!--
+ treat substance associated cross-reference as regular TID
+ web servers would make a link 
+ to the corresponding record in Entrez databases
+ treat substance associated target information as regular TID
+ for example, for RNAi screening data, each 'substance' may
+ correspond to a specific gene target
+-->
+<!ELEMENT PC-ResultType_annot (%INTEGER;)>
+
+<!--
+    pmid	-  PubMed ID
+    mmdb	-  MMDB ID
+    url	-  indicate  TID data is a url that provides supplementary information
+    protein-gi	-  GenBank General ID (GI) for a Protein
+    nucleotide-gi	-  GenBank General ID (GI) for a Nucleotide 
+    taxonomy	-  Taxonomy ID for an Organism
+    mim	-  MIM, Mendelian Inheritance in Man, ID 
+    gene	-  Entrez Gene ID
+    probe	-  Entrez Probe ID
+    aid	-  PubChem BioAssay ID, may be used in 'Summary' assay
+    sid	-  PubChem Substance ID, may be used in 'Summary' assay 
+    cid	-  PubChem Compound ID 
+    protein-target-gi	-  GenBank General ID (GI) for a Protein target
+    biosystems-target-id	-  NCBI BioSystems ID 
+    target-name	-  target name
+    target-descr	-  brief target description 
+    target-tax-id	-  NCBI Taxonomy ID for target molecule 
+    gene-target-id	-  NCBI Gene ID for a gene target 
+    dna-nucleotide-target-gi	-  GenBank General ID (GI) for a DNA Nucleotide target 
+    rna-nucleotide-target-gi	-  GenBank General ID (GI) for a RNA Nucleotide target 
+-->
+<!ATTLIST PC-ResultType_annot value (
+        pmid |
+        mmdb |
+        url |
+        protein-gi |
+        nucleotide-gi |
+        taxonomy |
+        mim |
+        gene |
+        probe |
+        aid |
+        sid |
+        cid |
+        protein-target-gi |
+        biosystems-target-id |
+        target-name |
+        target-descr |
+        target-tax-id |
+        gene-target-id |
+        dna-nucleotide-target-gi |
+        rna-nucleotide-target-gi
+        ) #IMPLIED >
+
+
+
+<!ELEMENT PC-AssayPanelTestResult (
+        PC-AssayPanelTestResult_mid, 
+        PC-AssayPanelTestResult_readout-annot?)>
+
+<!--
+ panel member ID, see PC-AssayPanelMemberInfo
+ track association between a group of TIDs and panel member
+-->
+<!ELEMENT PC-AssayPanelTestResult_mid (%INTEGER;)>
+
+<!ELEMENT PC-AssayPanelTestResult_readout-annot (%INTEGER;)>
+
+<!--
+    regular	-  to indicate this TID column is a regular readout
+    outcome	-  to indicate this TID column is  "outcome" of the particular panel member
+    score	-  to indicate this TID column reports activity score of the particular panel member
+         to be used for neighboring assays
+    ac	-  to indicate this TID column is "active concentration"   
+         'outcome' and 'ac' type of TID are to be used for data analysis 
+         across members of panel
+         or across multiple assays including other panel assays
+-->
+<!ATTLIST PC-AssayPanelTestResult_readout-annot value (
+        regular |
+        outcome |
+        score |
+        ac
+        ) #IMPLIED >
+
+
+<!--The concentration attribute is to indicate that the readout under this test result field is biological concentration-response data, the attribute provides the value and unit of the tested concentration -->
+<!ELEMENT PC-ConcentrationAttr (
+        PC-ConcentrationAttr_concentration, 
+        PC-ConcentrationAttr_unit, 
+        PC-ConcentrationAttr_dr-id?)>
+
+<!ELEMENT PC-ConcentrationAttr_concentration (%REAL;)>
+<!-- Units for Concentration -->
+<!ELEMENT PC-ConcentrationAttr_unit (%INTEGER;)>
+
+<!--
+    um	-  microM
+-->
+<!ATTLIST PC-ConcentrationAttr_unit value (
+        um
+        ) #IMPLIED >
+
+
+<!-- Dose-Response Attribution ID (if applicable) -->
+<!ELEMENT PC-ConcentrationAttr_dr-id (%INTEGER;)>
+
+<!-- Mininum and Maximum Constraints on an Integer Value (used for validating incoming data) -->
+<!ELEMENT PC-IntegerMinMax (
+        PC-IntegerMinMax_min, 
+        PC-IntegerMinMax_max)>
+
+<!-- Minimum Value Allowed -->
+<!ELEMENT PC-IntegerMinMax_min (%INTEGER;)>
+
+<!-- Maximum Value Allowed -->
+<!ELEMENT PC-IntegerMinMax_max (%INTEGER;)>
+
+<!-- Mininum and Maximum Constraints on a Real Value (used for validating incoming data) -->
+<!ELEMENT PC-RealMinMax (
+        PC-RealMinMax_min, 
+        PC-RealMinMax_max)>
+
+<!-- Minimum Value Allowed -->
+<!ELEMENT PC-RealMinMax_min (%REAL;)>
+
+<!-- Maximum Value Allowed -->
+<!ELEMENT PC-RealMinMax_max (%REAL;)>
+
diff --git a/dtd/NCBI_PCSubstance.dtd b/dtd/NCBI_PCSubstance.dtd
new file mode 100644
index 0000000..0efe6fd
--- /dev/null
+++ b/dtd/NCBI_PCSubstance.dtd
@@ -0,0 +1,29 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pcsubstance.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_PCSubstance.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_PCSubstance_module PUBLIC "-//NCBI//NCBI PCSubstance Module//EN" "NCBI_PCSubstance.mod.dtd">
+%NCBI_PCSubstance_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
diff --git a/dtd/NCBI_PCSubstance.mod.dtd b/dtd/NCBI_PCSubstance.mod.dtd
new file mode 100644
index 0000000..479ed86
--- /dev/null
+++ b/dtd/NCBI_PCSubstance.mod.dtd
@@ -0,0 +1,1628 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pcsubstance.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 02/14/2012 23:05:04
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-PCSubstance"
+================================================= -->
+
+<!--
+ $Id: pcsubstance.asn 353134 2012-02-13 19:08:39Z bolton $
+ ===========================================================================
+
+                            PUBLIC DOMAIN NOTICE
+               National Center for Biotechnology Information
+
+  This software/database is a "United States Government Work" under the
+  terms of the United States Copyright Act.  It was written as part of
+  the author's official duties as a United States Government employee and
+  thus cannot be copyrighted.  This software/database is freely available
+  to the public for use. The National Library of Medicine and the U.S.
+  Government have not placed any restriction on its use or reproduction.
+
+  Although all reasonable efforts have been taken to ensure the accuracy
+  and reliability of the software and data, the NLM and the U.S.
+  Government do not and cannot warrant the performance or results that
+  may be obtained by using this software or data. The NLM and the U.S.
+  Government disclaim all warranties, express or implied, including
+  warranties of performance, merchantability or fitness for any particular
+  purpose.
+
+  Please cite the author in any work or product based on this material.
+
+ ===========================================================================
+
+ Authors:  NCBI Structure Group
+
+ File Description:
+      ASN.1 definitions for PubChem small molecule database
+
+ ===========================================================================
+-->
+
+<!-- Elements used by other modules:
+          PC-Substance,
+          PC-Compound,
+          PC-Substances,
+          PC-Compounds,
+          PC-Source,
+          PC-ID,
+          PC-InfoData,
+          PC-XRefData -->
+
+<!-- Elements referenced from other modules:
+          Pub FROM NCBI-Pub,
+          Date,
+          Object-id FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!-- Root Record for Chemical Substance Definition -->
+<!ELEMENT PC-Substance (
+        PC-Substance_sid, 
+        PC-Substance_source, 
+        PC-Substance_pub?, 
+        PC-Substance_synonyms?, 
+        PC-Substance_comment?, 
+        PC-Substance_xref?, 
+        PC-Substance_compound?)>
+
+<!--
+ Internal Tracking Information
+ Substance ID/Version  [Either valid ID or a "0" dummy
+   value, if "source" is to be used]
+   Note: Version is for internal use (only?)
+   Note: A valid ID is greater than "0"
+-->
+<!ELEMENT PC-Substance_sid (PC-ID)>
+
+<!-- Data Source for this Submission -->
+<!ELEMENT PC-Substance_source (PC-Source)>
+
+<!--
+ Substance Description Information
+ Articles Describing this Substance
+-->
+<!ELEMENT PC-Substance_pub (Pub*)>
+
+<!-- Substance Names provided by Depositor -->
+<!ELEMENT PC-Substance_synonyms (PC-Substance_synonyms_E*)>
+
+
+<!ELEMENT PC-Substance_synonyms_E (#PCDATA)>
+
+<!-- Comments and Description provided by Depositor -->
+<!ELEMENT PC-Substance_comment (PC-Substance_comment_E*)>
+
+
+<!ELEMENT PC-Substance_comment_E (#PCDATA)>
+
+<!-- X-Ref/LinkOut Data provided by Depositor -->
+<!ELEMENT PC-Substance_xref (PC-XRefData*)>
+
+<!--
+ Structure Description
+ Original Deposited Structure Information
+-->
+<!ELEMENT PC-Substance_compound (PC-Compounds)>
+
+<!-- Holder for groups of Substances -->
+<!ELEMENT PC-Substances (PC-Substance*)>
+
+<!-- ID and Version Description Information -->
+<!ELEMENT PC-ID (
+        PC-ID_id, 
+        PC-ID_version)>
+
+<!--
+ Unique "Global" ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-ID_id (%INTEGER;)>
+
+<!--
+ Incremented when Depositor updates record
+   Note: For Internal Use (only?)
+-->
+<!ELEMENT PC-ID_version (%INTEGER;)>
+
+<!-- Describes Substance Source, if from another database -->
+<!ELEMENT PC-Source (
+        PC-Source_individual | 
+        PC-Source_db | 
+        PC-Source_mmdb)>
+
+<!-- Individual Submission -->
+<!ELEMENT PC-Source_individual (Pub)>
+
+<!-- External DB Submission -->
+<!ELEMENT PC-Source_db (PC-DBTracking)>
+
+<!-- MMDB Submission (deprecated) -->
+<!ELEMENT PC-Source_mmdb (PC-MMDBSource)>
+
+<!-- External DB Tracking Information -->
+<!ELEMENT PC-DBTracking (
+        PC-DBTracking_name, 
+        PC-DBTracking_source-id, 
+        PC-DBTracking_date?, 
+        PC-DBTracking_description?, 
+        PC-DBTracking_pub?)>
+
+<!-- Unique Name of External Database -->
+<!ELEMENT PC-DBTracking_name (#PCDATA)>
+
+<!-- Primary Unique ID used by External DB -->
+<!ELEMENT PC-DBTracking_source-id (Object-id)>
+
+<!-- External Database Release Date -->
+<!ELEMENT PC-DBTracking_date (Date)>
+
+<!-- External Database Release Code/Description -->
+<!ELEMENT PC-DBTracking_description (#PCDATA)>
+
+<!-- Data Submission to same DB by original Author -->
+<!ELEMENT PC-DBTracking_pub (Pub)>
+
+<!-- MMDB Source Record detailing specific location or part of an MMDB Record -->
+<!ELEMENT PC-MMDBSource (
+        PC-MMDBSource_mmdb-id, 
+        PC-MMDBSource_molecule-id, 
+        PC-MMDBSource_molecule-name, 
+        PC-MMDBSource_residue-id?, 
+        PC-MMDBSource_residue-name?, 
+        PC-MMDBSource_atom-id?, 
+        PC-MMDBSource_atom-name?)>
+
+<!--
+ MMDB Record ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-MMDBSource_mmdb-id (%INTEGER;)>
+
+<!--
+ MMDB Molecule ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-MMDBSource_molecule-id (%INTEGER;)>
+
+<!-- MMDB Molecule Name -->
+<!ELEMENT PC-MMDBSource_molecule-name (PC-MMDBSource_molecule-name_E*)>
+
+
+<!ELEMENT PC-MMDBSource_molecule-name_E (#PCDATA)>
+
+<!--
+ Residue ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-MMDBSource_residue-id (%INTEGER;)>
+
+<!-- Residue Name -->
+<!ELEMENT PC-MMDBSource_residue-name (#PCDATA)>
+
+<!--
+ Atom ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-MMDBSource_atom-id (%INTEGER;)>
+
+<!-- Atom Name -->
+<!ELEMENT PC-MMDBSource_atom-name (#PCDATA)>
+
+<!-- Depositor Provided X-Ref and LinkOut data for Entrez -->
+<!ELEMENT PC-XRefData (
+        PC-XRefData_regid | 
+        PC-XRefData_rn | 
+        PC-XRefData_mesh | 
+        PC-XRefData_pmid | 
+        PC-XRefData_gi | 
+        PC-XRefData_mmdb | 
+        PC-XRefData_sid | 
+        PC-XRefData_cid | 
+        PC-XRefData_dburl | 
+        PC-XRefData_sburl | 
+        PC-XRefData_asurl | 
+        PC-XRefData_protein-gi | 
+        PC-XRefData_nucleotide-gi | 
+        PC-XRefData_taxonomy | 
+        PC-XRefData_aid | 
+        PC-XRefData_mim | 
+        PC-XRefData_gene | 
+        PC-XRefData_probe | 
+        PC-XRefData_biosystem | 
+        PC-XRefData_geogse | 
+        PC-XRefData_geogsm | 
+        PC-XRefData_patent)>
+
+<!-- External Database Registry ID -->
+<!ELEMENT PC-XRefData_regid (#PCDATA)>
+
+<!-- Registry Number (e.g., EC Number, CAS Number) -->
+<!ELEMENT PC-XRefData_rn (#PCDATA)>
+
+<!-- MESH Index Term -->
+<!ELEMENT PC-XRefData_mesh (#PCDATA)>
+
+<!--
+ PubMed ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_pmid (%INTEGER;)>
+
+<!--
+ GenBank General ID
+   Note: Please use protein-gi or nucleotide-gi, if possible
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_gi (%INTEGER;)>
+
+<!--
+ MMDB ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_mmdb (%INTEGER;)>
+
+<!--
+ PubChem Substance ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_sid (%INTEGER;)>
+
+<!--
+ PubChem Compound ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_cid (%INTEGER;)>
+
+<!-- Depositor Source Database Homepage -->
+<!ELEMENT PC-XRefData_dburl (#PCDATA)>
+
+<!-- Depositor Homepage for a Substance -->
+<!ELEMENT PC-XRefData_sburl (#PCDATA)>
+
+<!-- Depositor Homepage for an Assay -->
+<!ELEMENT PC-XRefData_asurl (#PCDATA)>
+
+<!--
+ GenBank General ID for a Protein
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_protein-gi (%INTEGER;)>
+
+<!--
+ GenBank General ID for a Nucleotide
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_nucleotide-gi (%INTEGER;)>
+
+<!--
+ Taxonomy ID for an Organism
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_taxonomy (%INTEGER;)>
+
+<!--
+ PubChem BioAssay ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_aid (%INTEGER;)>
+
+<!--
+ MIM, Mendelian Inheritance in Man, Number 
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_mim (%INTEGER;)>
+
+<!--
+ Entrez Gene ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_gene (%INTEGER;)>
+
+<!--
+ Probe ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_probe (%INTEGER;)>
+
+<!--
+ BioSystem ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_biosystem (%INTEGER;)>
+
+<!--
+ Gene Expression Omnibus Series Accession (GEO GSE) ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_geogse (%INTEGER;)>
+
+<!--
+ Gene Expression Omnibus Sample Accession (GEO GSM) ID
+   Note: Must be greater than "0" or, if invalid, "0"
+-->
+<!ELEMENT PC-XRefData_geogsm (%INTEGER;)>
+
+<!-- Patent Identifier (e.g., USPTO, EPO, WPO, JPO, CPO) -->
+<!ELEMENT PC-XRefData_patent (#PCDATA)>
+
+<!-- Compound Record -->
+<!ELEMENT PC-Compound (
+        PC-Compound_id, 
+        PC-Compound_atoms?, 
+        PC-Compound_bonds?, 
+        PC-Compound_stereo?, 
+        PC-Compound_coords?, 
+        PC-Compound_charge?, 
+        PC-Compound_props?, 
+        PC-Compound_stereogroups?, 
+        PC-Compound_count?, 
+        PC-Compound_vbalt?)>
+
+<!--
+ Tracking Information
+ Compound Qualifier (Type/ID)
+-->
+<!ELEMENT PC-Compound_id (PC-CompoundType)>
+
+<!-- AtomID/Type Information -->
+<!ELEMENT PC-Compound_atoms (PC-Atoms)>
+
+<!-- BondID/Type/Atom Information -->
+<!ELEMENT PC-Compound_bonds (PC-Bonds)>
+
+<!-- StereoCenter Descriptions -->
+<!ELEMENT PC-Compound_stereo (PC-StereoCenter*)>
+
+<!-- 2D/3D Coordinate Sets of Compound -->
+<!ELEMENT PC-Compound_coords (PC-Coordinates*)>
+
+<!-- Provided Total Formal Charge  (Signed Integer) -->
+<!ELEMENT PC-Compound_charge (%INTEGER;)>
+
+<!-- Derived (computed) Properties -->
+<!ELEMENT PC-Compound_props (PC-InfoData*)>
+
+<!-- Relative stereochemistry groups -->
+<!ELEMENT PC-Compound_stereogroups (PC-StereoGroup*)>
+
+<!-- Counts of various properties -->
+<!ELEMENT PC-Compound_count (PC-Count)>
+
+<!-- Alternate Valence-Bond Forms -->
+<!ELEMENT PC-Compound_vbalt (PC-Compounds)>
+
+<!-- Holder for groups of Compounds -->
+<!ELEMENT PC-Compounds (PC-Compound*)>
+
+<!--
+ Qualification used to describe the type of Compound deposited, standardized, or derived.
+    Please note that mixtures/cocktails may be specified using previously deposited substances.
+-->
+<!ELEMENT PC-CompoundType (
+        PC-CompoundType_type?, 
+        PC-CompoundType_id?)>
+<!--
+  Compound Qualifier or Type
+ For Compound Depositions
+-->
+<!ELEMENT PC-CompoundType_type (%INTEGER;)>
+
+<!--
+    deposited	-  Original Deposited Compound
+         For Standardized Compounds
+    standardized	-  Standardized Form of a Deposited Compound
+    component	-  Component of a Standardized Compound
+    neutralized	-  Neutralized Form of a Standardized Compound
+         For Mixture/Cocktail Depositions
+    mixture	-  Substance that is a component of a mixture
+         For Theoretical Compounds
+    tautomer	-  Predicted Tautomer Form
+    pka-state	-  Predicted Ionized pKa Form
+    unknown	-  Unknown Compound Type
+-->
+<!ATTLIST PC-CompoundType_type value (
+        deposited |
+        standardized |
+        component |
+        neutralized |
+        mixture |
+        tautomer |
+        pka-state |
+        unknown
+        ) #IMPLIED >
+
+<!--  Compound Namespace and ID  (absent for "deposited" type compounds) -->
+<!ELEMENT PC-CompoundType_id (
+        PC-CompoundType_id_cid | 
+        PC-CompoundType_id_sid | 
+        PC-CompoundType_id_xid)>
+
+<!--  Standardized Compound -->
+<!ELEMENT PC-CompoundType_id_cid (%INTEGER;)>
+
+<!--  PubChem Substance (for "mixture" type compounds) -->
+<!ELEMENT PC-CompoundType_id_sid (%INTEGER;)>
+
+<!--  PubChem Theoretical Compound -->
+<!ELEMENT PC-CompoundType_id_xid (%INTEGER;)>
+
+<!-- Counts of various properties of a Compound -->
+<!ELEMENT PC-Count (
+        PC-Count_heavy-atom, 
+        PC-Count_atom-chiral, 
+        PC-Count_atom-chiral-def, 
+        PC-Count_atom-chiral-undef, 
+        PC-Count_bond-chiral, 
+        PC-Count_bond-chiral-def, 
+        PC-Count_bond-chiral-undef, 
+        PC-Count_isotope-atom, 
+        PC-Count_covalent-unit, 
+        PC-Count_tautomers)>
+
+<!-- Total count of non-Hydrogen (Heavy) Atoms -->
+<!ELEMENT PC-Count_heavy-atom (%INTEGER;)>
+
+<!--
+ StereoChemistry Counts
+ Total count of (SP3) Chiral Atoms
+-->
+<!ELEMENT PC-Count_atom-chiral (%INTEGER;)>
+
+<!-- Total count of Defined (SP3) Chiral Atoms -->
+<!ELEMENT PC-Count_atom-chiral-def (%INTEGER;)>
+
+<!-- Total count of Undefined (SP3) Chiral Atoms -->
+<!ELEMENT PC-Count_atom-chiral-undef (%INTEGER;)>
+
+<!-- Total count of (SP2) Chiral Bonds -->
+<!ELEMENT PC-Count_bond-chiral (%INTEGER;)>
+
+<!-- Total count of (SP2) Defined Chiral Bonds -->
+<!ELEMENT PC-Count_bond-chiral-def (%INTEGER;)>
+
+<!-- Total count of (SP2) Undefined Chiral Bonds -->
+<!ELEMENT PC-Count_bond-chiral-undef (%INTEGER;)>
+
+<!--
+ Isotopic Counts
+ Total count of Atoms with Isotopic Information
+-->
+<!ELEMENT PC-Count_isotope-atom (%INTEGER;)>
+
+<!--
+ Discrete Structure Counts
+ Total count of covalently-bonded units in the record
+-->
+<!ELEMENT PC-Count_covalent-unit (%INTEGER;)>
+
+<!-- Number of possible tautomers (Max. 999) -->
+<!ELEMENT PC-Count_tautomers (%INTEGER;)>
+
+<!--
+ List of atom identifiers which are in a common stereochemistry group.
+ All atoms in this group possess the characteristic of the type specified.
+ The convention adopted is intended to be compatible with MDL's Enhanced
+ Stereochemical Representation white paper.
+ An atom can only be member of a single stereo group, and all atoms
+ in a stereo group must have a stereo descriptor.
+ Stereogroups only apply to stereocenters that can have parity.
+-->
+<!ELEMENT PC-StereoGroup (
+        PC-StereoGroup_type, 
+        PC-StereoGroup_aid)>
+
+<!ELEMENT PC-StereoGroup_type (%INTEGER;)>
+
+<!--
+    absolute	-  Absolute configuration is known
+    or	-  Relative configuration is known (absolute configuration is unknown)
+    and	-  Mixture of stereoisomers
+    unknown	-  Unknown configuration type
+-->
+<!ATTLIST PC-StereoGroup_type value (
+        absolute |
+        or |
+        and |
+        unknown
+        ) #IMPLIED >
+
+
+<!--
+ Atom Identifiers of atoms in this group
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoGroup_aid (PC-StereoGroup_aid_E*)>
+
+
+<!ELEMENT PC-StereoGroup_aid_E (%INTEGER;)>
+
+<!-- Compound Description/Descriptor Data -->
+<!ELEMENT PC-InfoData (
+        PC-InfoData_urn, 
+        PC-InfoData_value)>
+
+<!-- Universal Resource Name  [for Value Qualification] -->
+<!ELEMENT PC-InfoData_urn (PC-Urn)>
+<!-- Data Value -->
+<!ELEMENT PC-InfoData_value (
+        PC-InfoData_value_bval | 
+        PC-InfoData_value_bvec | 
+        PC-InfoData_value_ival | 
+        PC-InfoData_value_ivec | 
+        PC-InfoData_value_fval | 
+        PC-InfoData_value_fvec | 
+        PC-InfoData_value_sval | 
+        PC-InfoData_value_slist | 
+        PC-InfoData_value_date | 
+        PC-InfoData_value_binary | 
+        PC-InfoData_value_bitlist)>
+
+<!-- Boolean or Binary -->
+<!ELEMENT PC-InfoData_value_bval EMPTY>
+<!ATTLIST PC-InfoData_value_bval value ( true | false ) #REQUIRED >
+
+
+<!-- Boolean Vector -->
+<!ELEMENT PC-InfoData_value_bvec (PC-InfoData_value_bvec_E*)>
+
+
+<!ELEMENT PC-InfoData_value_bvec_E EMPTY>
+<!ATTLIST PC-InfoData_value_bvec_E value ( true | false ) #REQUIRED >
+
+
+<!-- Integer (signed or unsigned) -->
+<!ELEMENT PC-InfoData_value_ival (%INTEGER;)>
+
+<!-- Integer Vector -->
+<!ELEMENT PC-InfoData_value_ivec (PC-InfoData_value_ivec_E*)>
+
+
+<!ELEMENT PC-InfoData_value_ivec_E (%INTEGER;)>
+
+<!-- Float or Double -->
+<!ELEMENT PC-InfoData_value_fval (%REAL;)>
+
+<!-- Double Vector -->
+<!ELEMENT PC-InfoData_value_fvec (PC-InfoData_value_fvec_E*)>
+
+
+<!ELEMENT PC-InfoData_value_fvec_E (%REAL;)>
+
+<!-- String -->
+<!ELEMENT PC-InfoData_value_sval (#PCDATA)>
+
+<!-- List of Strings -->
+<!ELEMENT PC-InfoData_value_slist (PC-InfoData_value_slist_E*)>
+
+
+<!ELEMENT PC-InfoData_value_slist_E (#PCDATA)>
+
+<!-- Date -->
+<!ELEMENT PC-InfoData_value_date (Date)>
+
+<!-- Binary Data -->
+<!ELEMENT PC-InfoData_value_binary (%OCTETS;)>
+
+<!-- Bit List (specialized version of Boolean vector) -->
+<!ELEMENT PC-InfoData_value_bitlist (%BITS;)>
+
+<!--
+ Universal Resource Name 
+    Provides explicit source information on derived or calculated data 
+-->
+<!ELEMENT PC-Urn (
+        PC-Urn_label, 
+        PC-Urn_name?, 
+        PC-Urn_datatype?, 
+        PC-Urn_parameters?, 
+        PC-Urn_implementation?, 
+        PC-Urn_version?, 
+        PC-Urn_software?, 
+        PC-Urn_source?, 
+        PC-Urn_release?)>
+
+<!-- Generic Name or Label for Display  [e.g., "Log P"] -->
+<!ELEMENT PC-Urn_label (#PCDATA)>
+
+<!-- Qualified Name  [e.g., "XlogP"] -->
+<!ELEMENT PC-Urn_name (#PCDATA)>
+
+<!-- Specific Data Type of Value  [e.g., binary] -->
+<!ELEMENT PC-Urn_datatype (PC-UrnDataType)>
+
+<!-- Implementation Parameter  [e.g., "metal=0"] -->
+<!ELEMENT PC-Urn_parameters (#PCDATA)>
+
+<!-- Implementation Name  [e.g., "E_XlogP"] -->
+<!ELEMENT PC-Urn_implementation (#PCDATA)>
+
+<!-- Implementation Version  [e.g., "3.317"] -->
+<!ELEMENT PC-Urn_version (#PCDATA)>
+
+<!-- Implementation Software  [e.g., "Cactvs"] -->
+<!ELEMENT PC-Urn_software (#PCDATA)>
+
+<!-- Implementation Organization  [e.g., "xemistry.com"] -->
+<!ELEMENT PC-Urn_source (#PCDATA)>
+
+<!-- NCBI Implementation Release  [e.g., "10.25.2005"] -->
+<!ELEMENT PC-Urn_release (#PCDATA)>
+
+<!--
+ URN Data Type
+   Provides the ability to use more specific data types than that directly provided by ASN.1.
+   Provides for more specific validation of specified data.
+-->
+<!ELEMENT PC-UrnDataType (%INTEGER;)>
+
+<!--
+    string	-  Basic Data Types
+         String                             [maps to a VisibleString]
+    stringlist	-  List of Strings                    [maps to VisibleString list]
+    int	-  32-Bit Signed Integer              [maps to an INTEGER]
+    intvec	-  Vector of 32-Bit Signed Integer    [maps to INTEGER vector]
+    uint	-  32-Bit Unsigned Integer            [maps to an INTEGER]
+    uintvec	-  Vector of 32-Bit Unsigned Integer  [maps to INTEGER vector]
+    double	-  64-Bit Float                       [maps to a REAL]
+    doublevec	-  Vector of Double                   [maps to REAL vector]
+    bool	-  Boolean or Binary value            [maps to a BOOLEAN]
+    boolvec	-  Boolean Vector                     [maps to BOOLEAN vector]
+    uint64	-  Specialized Data Types
+         64-Bit Unsigned Integer (Hex form) [maps to a VisibleString]
+    binary	-  Binary Data Blob                   [maps to an OCTET STRING]
+    url	-  URL                                [maps to a VisibleString]
+    unicode	-  UniCode String                     [maps to a VisibleString]
+    date	-  ISO8601 Date                       [maps to a Date]
+    fingerprint	-  Binary Fingerprint (Gzip'ped bit   [maps to an OCTET STRING]
+           list w/ 4-Byte prefix denoting bit list length)
+    unknown	-  Unknown Data Type               [maps to a set of VisibleString]
+-->
+<!ATTLIST PC-UrnDataType value (
+        string |
+        stringlist |
+        int |
+        intvec |
+        uint |
+        uintvec |
+        double |
+        doublevec |
+        bool |
+        boolvec |
+        uint64 |
+        binary |
+        url |
+        unicode |
+        date |
+        fingerprint |
+        unknown
+        ) #IMPLIED >
+
+
+<!-- Coordinates for the Compound of a given type -->
+<!ELEMENT PC-Coordinates (
+        PC-Coordinates_type, 
+        PC-Coordinates_aid, 
+        PC-Coordinates_conformers?, 
+        PC-Coordinates_atomlabels?, 
+        PC-Coordinates_data?)>
+
+<!-- Coordinate Type Information (vector) -->
+<!ELEMENT PC-Coordinates_type (PC-CoordinateType*)>
+
+<!--
+ Conformer Atom IDs (vector)
+   (to be kept synchronized with Conformers)
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-Coordinates_aid (PC-Coordinates_aid_E*)>
+
+
+<!ELEMENT PC-Coordinates_aid_E (%INTEGER;)>
+
+<!-- Conformers for this Coordinate Set -->
+<!ELEMENT PC-Coordinates_conformers (PC-Conformer*)>
+
+<!-- Atom labels for Conformer Set -->
+<!ELEMENT PC-Coordinates_atomlabels (PC-AtomString*)>
+
+<!-- Data Associated with these Coordinates -->
+<!ELEMENT PC-Coordinates_data (PC-InfoData*)>
+
+<!--
+ Drawing/Conformer Definition (in Parallel Arrays, synchronized to aid integer list)
+   3D coordinates are specified in a right-handed coordinate system. For 2D plots, Y axis leads upwards.
+-->
+<!ELEMENT PC-Conformer (
+        PC-Conformer_x, 
+        PC-Conformer_y, 
+        PC-Conformer_z?, 
+        PC-Conformer_style?, 
+        PC-Conformer_data?)>
+
+<!--
+  [Note: Parallel Arrays must be kept Synchronized]
+ X Coordinates (vector)
+-->
+<!ELEMENT PC-Conformer_x (PC-Conformer_x_E*)>
+
+
+<!ELEMENT PC-Conformer_x_E (%REAL;)>
+
+<!-- Y Coordinates (vector) -->
+<!ELEMENT PC-Conformer_y (PC-Conformer_y_E*)>
+
+
+<!ELEMENT PC-Conformer_y_E (%REAL;)>
+
+<!-- Z Coordinates (vector) -->
+<!ELEMENT PC-Conformer_z (PC-Conformer_z_E*)>
+
+
+<!ELEMENT PC-Conformer_z_E (%REAL;)>
+
+<!-- Structure Annotations -->
+<!ELEMENT PC-Conformer_style (PC-DrawAnnotations)>
+
+<!-- Data Associated with this Conformer -->
+<!ELEMENT PC-Conformer_data (PC-InfoData*)>
+
+<!-- Holder for groups of Conformers -->
+<!ELEMENT PC-Conformers (PC-Conformer*)>
+
+<!-- Coordinate Set Type Distinctions -->
+<!ELEMENT PC-CoordinateType (%INTEGER;)>
+
+<!--
+    twod	-  2D Coordinates
+    threed	-  3D Coordinates (should also indicate units, below)
+    submitted	-  Depositor Provided Coordinates
+    experimental	-  Experimentally Determined Coordinates
+    computed	-  Computed Coordinates
+    standardized	-  Standardized Coordinates
+    augmented	-  Hybrid Original with Computed Coordinates (e.g., explicit H)
+    aligned	-  Template used to align drawing
+    compact	-  Drawing uses shorthand forms (e.g., COOH, OCH3, Et, etc.)
+    units-angstroms	-  (3D) Coordinate units are Angstroms
+    units-nanometers	-  (3D) Coordinate units are nanometers
+    units-pixel	-  (2D) Coordinate units are pixels
+    units-points	-  (2D) Coordinate units are points
+    units-stdbonds	-  (2D) Coordinate units are standard bond lengths (1.0)
+    units-unknown	-  Coordinate units are unknown or unspecified
+-->
+<!ATTLIST PC-CoordinateType value (
+        twod |
+        threed |
+        submitted |
+        experimental |
+        computed |
+        standardized |
+        augmented |
+        aligned |
+        compact |
+        units-angstroms |
+        units-nanometers |
+        units-pixel |
+        units-points |
+        units-stdbonds |
+        units-unknown
+        ) #IMPLIED >
+
+
+<!--
+ Drawing Annotations (in Parallel Arrays)
+    [Note: A pair of atoms can have multiple annotations]
+-->
+<!ELEMENT PC-DrawAnnotations (
+        PC-DrawAnnotations_annotation, 
+        PC-DrawAnnotations_aid1, 
+        PC-DrawAnnotations_aid2)>
+
+<!--
+  [Note: Parallel Arrays must be kept Synchronized]
+ Bond Annotations (vector)
+-->
+<!ELEMENT PC-DrawAnnotations_annotation (PC-BondAnnotation*)>
+
+<!--
+ Atom1 Identifier (vector)
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-DrawAnnotations_aid1 (PC-DrawAnnotations_aid1_E*)>
+
+
+<!ELEMENT PC-DrawAnnotations_aid1_E (%INTEGER;)>
+
+<!--
+ Atom2 Identifier (vector)
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-DrawAnnotations_aid2 (PC-DrawAnnotations_aid2_E*)>
+
+
+<!ELEMENT PC-DrawAnnotations_aid2_E (%INTEGER;)>
+
+<!-- Atom-Atom Annotation Information -->
+<!ELEMENT PC-BondAnnotation (%INTEGER;)>
+
+<!--
+    crossed	-  Double Bond that can be both Cis/Trans
+    dashed	-  Hydrogen-Bond (3D Only?)
+    wavy	-  Unknown Stereochemistry
+    dotted	-  Complex/Fractional
+    wedge-up	-  Above-Plane
+    wedge-down	-  Below-Plane
+    arrow	-  Dative
+    aromatic	-  Aromatic
+    resonance	-  Resonance
+    bold	-  Fat Bond (Non-Specific User Interpreted Information)
+    fischer	-  Interpret Bond Stereo using Fischer Conventions
+    closeContact	-  Identification of Atom-Atom Close Contacts (3D Only)
+    unknown	-  Unspecified or Unknown Atom-Atom Annotation
+-->
+<!ATTLIST PC-BondAnnotation value (
+        crossed |
+        dashed |
+        wavy |
+        dotted |
+        wedge-up |
+        wedge-down |
+        arrow |
+        aromatic |
+        resonance |
+        bold |
+        fischer |
+        closeContact |
+        unknown
+        ) #IMPLIED >
+
+
+<!-- Atom Information  (in Parallel Arrays) -->
+<!ELEMENT PC-Atoms (
+        PC-Atoms_aid, 
+        PC-Atoms_element, 
+        PC-Atoms_label?, 
+        PC-Atoms_isotope?, 
+        PC-Atoms_charge?, 
+        PC-Atoms_radical?, 
+        PC-Atoms_source?, 
+        PC-Atoms_comment?)>
+
+<!--
+  [Note: Parallel Arrays must be kept Synchronized]
+ Atom Identifiers (vector)
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-Atoms_aid (PC-Atoms_aid_E*)>
+
+
+<!ELEMENT PC-Atoms_aid_E (%INTEGER;)>
+
+<!-- Atomic Numbers (vector) -->
+<!ELEMENT PC-Atoms_element (PC-Element*)>
+
+<!--
+ Independent Arrays of ID-Value Pairs  (Technically allows multiple values per Atom)
+ Atom labels
+-->
+<!ELEMENT PC-Atoms_label (PC-AtomString*)>
+
+<!-- Isotopic Information -->
+<!ELEMENT PC-Atoms_isotope (PC-AtomInt*)>
+
+<!-- Formal Charges -->
+<!ELEMENT PC-Atoms_charge (PC-AtomInt*)>
+
+<!-- Radical Information -->
+<!ELEMENT PC-Atoms_radical (PC-AtomRadical*)>
+
+<!-- E.g. identity of MMDB "R" groups -->
+<!ELEMENT PC-Atoms_source (PC-AtomSource*)>
+
+<!-- Atom Comments -->
+<!ELEMENT PC-Atoms_comment (PC-AtomString*)>
+
+<!-- Specification of an Association between an Atom Identifier and Source -->
+<!ELEMENT PC-AtomSource (
+        PC-AtomSource_aid, 
+        PC-AtomSource_source)>
+
+<!--
+ Atom Identifier for the R-Group Source
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-AtomSource_aid (%INTEGER;)>
+
+<!-- Atom Specific MMDB Record -->
+<!ELEMENT PC-AtomSource_source (PC-MMDBSource)>
+
+<!-- Specification of an Association between an Atom Identifier and an Integer Value -->
+<!ELEMENT PC-AtomInt (
+        PC-AtomInt_aid, 
+        PC-AtomInt_value)>
+
+<!--
+ Atom Identifier for the Value
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-AtomInt_aid (%INTEGER;)>
+
+<!-- Value Associated to the ID -->
+<!ELEMENT PC-AtomInt_value (%INTEGER;)>
+
+<!-- Specification of an Association between an Atom Identifier and a String Value -->
+<!ELEMENT PC-AtomString (
+        PC-AtomString_aid, 
+        PC-AtomString_value)>
+
+<!--
+ Atom Identifier for the Value
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-AtomString_aid (%INTEGER;)>
+
+<!-- Value Associated to the ID -->
+<!ELEMENT PC-AtomString_value (#PCDATA)>
+
+<!-- Rudimentary Atom Electronic Configuration Designation -->
+<!ELEMENT PC-AtomRadical (
+        PC-AtomRadical_aid, 
+        PC-AtomRadical_type)>
+
+<!--
+ Atom Identifier for the Value
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-AtomRadical_aid (%INTEGER;)>
+<!-- Type of Atom Radical -->
+<!ELEMENT PC-AtomRadical_type (%INTEGER;)>
+
+<!--
+    singlet	-  Open-Shell Singlet
+    doublet	-  Open-Shell Doublet
+    triplet	-  Open-Shell Triplet
+    quartet	-  Open-Shell Quartet
+    quintet	-  Open-Shell Quintet
+    hextet	-  Open-Shell Hextet
+    heptet	-  Open-Shell Quintet
+    octet	-  Open-Shell Octet
+    none	-  Closed-Shell Singlet
+-->
+<!ATTLIST PC-AtomRadical_type value (
+        singlet |
+        doublet |
+        triplet |
+        quartet |
+        quintet |
+        hextet |
+        heptet |
+        octet |
+        none
+        ) #IMPLIED >
+
+
+<!-- Element Information [which may contain "illegal" element values] -->
+<!ELEMENT PC-Element (%INTEGER;)>
+
+<!--
+    a	-  Illegal Atom Numbers that may be Interpreted to be something else
+         Unspecified Atom (Asterick)
+    d	-  Dummy Atom
+    r	-  Rgroup Label
+    lp	-  Lone Pair
+    h	-  Elements
+-->
+<!ATTLIST PC-Element value (
+        a |
+        d |
+        r |
+        lp |
+        h |
+        he |
+        li |
+        be |
+        b |
+        c |
+        n |
+        o |
+        f |
+        ne |
+        na |
+        mg |
+        al |
+        si |
+        p |
+        s |
+        cl |
+        ar |
+        k |
+        ca |
+        sc |
+        ti |
+        v |
+        cr |
+        mn |
+        fe |
+        co |
+        ni |
+        cu |
+        zn |
+        ga |
+        ge |
+        as |
+        se |
+        br |
+        kr |
+        rb |
+        sr |
+        y |
+        zr |
+        nb |
+        mo |
+        tc |
+        ru |
+        rh |
+        pd |
+        ag |
+        cd |
+        in |
+        sn |
+        sb |
+        te |
+        i |
+        xe |
+        cs |
+        ba |
+        la |
+        ce |
+        pr |
+        nd |
+        pm |
+        sm |
+        eu |
+        gd |
+        tb |
+        dy |
+        ho |
+        er |
+        tm |
+        yb |
+        lu |
+        hf |
+        ta |
+        w |
+        re |
+        os |
+        ir |
+        pt |
+        au |
+        hg |
+        tl |
+        pb |
+        bi |
+        po |
+        at |
+        rn |
+        fr |
+        ra |
+        ac |
+        th |
+        pa |
+        u |
+        np |
+        pu |
+        am |
+        cm |
+        bk |
+        cf |
+        es |
+        fm |
+        md |
+        no |
+        lr |
+        rf |
+        db |
+        sg |
+        bh |
+        hs |
+        mt |
+        ds |
+        rg
+        ) #IMPLIED >
+
+
+<!-- Bond Description Information  (in Parallel Arrays) -->
+<!ELEMENT PC-Bonds (
+        PC-Bonds_aid1, 
+        PC-Bonds_aid2, 
+        PC-Bonds_order)>
+
+<!--
+  [Note: Parallel Arrays must be kept Synchronized]
+ Atom1 Identifier (vector)
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-Bonds_aid1 (PC-Bonds_aid1_E*)>
+
+
+<!ELEMENT PC-Bonds_aid1_E (%INTEGER;)>
+
+<!--
+ Atom2 Identifier (vector)
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-Bonds_aid2 (PC-Bonds_aid2_E*)>
+
+
+<!ELEMENT PC-Bonds_aid2_E (%INTEGER;)>
+
+<!-- Bond Type Information (vector) -->
+<!ELEMENT PC-Bonds_order (PC-BondType*)>
+
+<!-- Bond Type Information -->
+<!ELEMENT PC-BondType (%INTEGER;)>
+
+<!--
+    single	-  Single Bond
+    double	-  Double Bond
+    triple	-  Triple Bond
+    quadruple	-  Quadruple Bond
+    dative	-  Dative Bond
+    complex	-  Complex Bond
+    ionic	-  Ionic Bond
+    unknown	-  Unknown/Unspecified Connectivity
+-->
+<!ATTLIST PC-BondType value (
+        single |
+        double |
+        triple |
+        quadruple |
+        dative |
+        complex |
+        ionic |
+        unknown
+        ) #IMPLIED >
+
+
+<!--
+ Allowed Stereogenic Center Types
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+-->
+<!ELEMENT PC-StereoCenter (
+        PC-StereoCenter_tetrahedral | 
+        PC-StereoCenter_planar | 
+        PC-StereoCenter_squareplanar | 
+        PC-StereoCenter_octahedral | 
+        PC-StereoCenter_bipyramid | 
+        PC-StereoCenter_tshape | 
+        PC-StereoCenter_pentagonal)>
+
+<!-- Tetrahedral (SP3) StereoCenter -->
+<!ELEMENT PC-StereoCenter_tetrahedral (PC-StereoTetrahedral)>
+
+<!-- Planar (SP2) StereoCenter -->
+<!ELEMENT PC-StereoCenter_planar (PC-StereoPlanar)>
+
+<!-- Square Planar (SP4) StereoCenter -->
+<!ELEMENT PC-StereoCenter_squareplanar (PC-StereoSquarePlanar)>
+
+<!-- Octahedral (OC-6) / Square Pyramid (SPY-5) StereoCenters -->
+<!ELEMENT PC-StereoCenter_octahedral (PC-StereoOctahedral)>
+
+<!-- Trigonal BiPyramid (TBPY-4 and TBPY-5) StereoCenters -->
+<!ELEMENT PC-StereoCenter_bipyramid (PC-StereoTrigonalBiPyramid)>
+
+<!-- T-Shaped (TS-3) StereoCenters -->
+<!ELEMENT PC-StereoCenter_tshape (PC-StereoTShape)>
+
+<!-- Pentagonal BiPyramid (PBPY-7) StereoCenters -->
+<!ELEMENT PC-StereoCenter_pentagonal (PC-StereoPentagonalBiPyramid)>
+
+<!--
+ SP3 Tetrahedral StereoCenter, Trigonal Pyramid Stereogenic Center,
+   Cumulenic StereoCenter (Linear systems of an even number of double bonds),
+   or Hindered biaryl stereocenter (All biaryls have hindered rotation that
+   to some extent the ortho-hydrogens prevent coplanarity)
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoTetrahedral (
+        PC-StereoTetrahedral_center, 
+        PC-StereoTetrahedral_above, 
+        PC-StereoTetrahedral_top, 
+        PC-StereoTetrahedral_bottom, 
+        PC-StereoTetrahedral_below, 
+        PC-StereoTetrahedral_parity?, 
+        PC-StereoTetrahedral_type?)>
+
+<!--
+ Atom Identifier of Atom Center
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTetrahedral_center (%INTEGER;)>
+
+<!--
+ Atom Identifier of Atom Above the Plane
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTetrahedral_above (%INTEGER;)>
+
+<!--
+ Atom Identifier of Atom In-Plane and at the Top
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTetrahedral_top (%INTEGER;)>
+
+<!--
+ Atom Identifier of Atom In-Plane and at the Bottom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTetrahedral_bottom (%INTEGER;)>
+
+<!--
+ Atom Identifier of Atom Below the Plane
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTetrahedral_below (%INTEGER;)>
+<!-- StereoCenter Designation -->
+<!ELEMENT PC-StereoTetrahedral_parity (%INTEGER;)>
+<!ATTLIST PC-StereoTetrahedral_parity value (
+        clockwise |
+        counterclockwise |
+        any |
+        unknown
+        ) #IMPLIED >
+
+<!-- Type of StereoCenter, Tetrahedral, if not specified -->
+<!ELEMENT PC-StereoTetrahedral_type (%INTEGER;)>
+
+<!--
+    tetrahedral	-  Tetrahedral StereoCenter
+    cumulenic	-  Cumulenic StereoCenter
+    biaryl	-  Biaryl StereoCenter
+-->
+<!ATTLIST PC-StereoTetrahedral_type value (
+        tetrahedral |
+        cumulenic |
+        biaryl
+        ) #IMPLIED >
+
+
+<!--
+ SP2 Planar Stereogenic Center, Cumulenic StereoCenter (Linear systems on an odd
+   number of double bonds present planar stereochemistry)
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoPlanar (
+        PC-StereoPlanar_left, 
+        PC-StereoPlanar_ltop, 
+        PC-StereoPlanar_lbottom, 
+        PC-StereoPlanar_right, 
+        PC-StereoPlanar_rtop, 
+        PC-StereoPlanar_rbottom, 
+        PC-StereoPlanar_parity?, 
+        PC-StereoPlanar_type?)>
+
+<!--
+ Atom ID of Left Double Bond Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPlanar_left (%INTEGER;)>
+
+<!--
+ Atom ID of Top Atom attached to the Left Double Bond Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPlanar_ltop (%INTEGER;)>
+
+<!--
+ Atom ID of Bottom Atom attached to the Left Double Bond Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPlanar_lbottom (%INTEGER;)>
+
+<!--
+ Atom ID of Right Double Bond Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPlanar_right (%INTEGER;)>
+
+<!--
+ Atom ID of Top Atom attached to the Right Double Bond Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPlanar_rtop (%INTEGER;)>
+
+<!--
+ Atom ID of Bottom Atom attached to the Right Double Bond Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPlanar_rbottom (%INTEGER;)>
+<!-- StereoCenter Designation -->
+<!ELEMENT PC-StereoPlanar_parity (%INTEGER;)>
+<!ATTLIST PC-StereoPlanar_parity value (
+        same |
+        opposite |
+        any |
+        unknown
+        ) #IMPLIED >
+
+<!-- Type of StereoCenter, SP2 Planar, if not specified -->
+<!ELEMENT PC-StereoPlanar_type (%INTEGER;)>
+
+<!--
+    planar	-  SP2 Planar StereoCenter
+    cumulenic	-  Cumulenic StereoCenter
+-->
+<!ATTLIST PC-StereoPlanar_type value (
+        planar |
+        cumulenic
+        ) #IMPLIED >
+
+
+<!--
+ Square Planar (SP4) StereoCenters
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoSquarePlanar (
+        PC-StereoSquarePlanar_center, 
+        PC-StereoSquarePlanar_lbelow, 
+        PC-StereoSquarePlanar_rbelow, 
+        PC-StereoSquarePlanar_labove, 
+        PC-StereoSquarePlanar_rabove, 
+        PC-StereoSquarePlanar_parity?)>
+
+<!--
+ Atom ID of Atom Center
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoSquarePlanar_center (%INTEGER;)>
+
+<!--
+ Atom ID of Left Below Plane Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoSquarePlanar_lbelow (%INTEGER;)>
+
+<!--
+ Atom ID of Right Below Plane Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoSquarePlanar_rbelow (%INTEGER;)>
+
+<!--
+ Atom ID of Left Above Plane Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoSquarePlanar_labove (%INTEGER;)>
+
+<!--
+ Atom ID of Right Above Plane Atom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoSquarePlanar_rabove (%INTEGER;)>
+<!-- StereoCenter Type -->
+<!ELEMENT PC-StereoSquarePlanar_parity (%INTEGER;)>
+
+<!--
+    u-shape	-    U shaped isomer (labove-lbelow-rbelow-rabove)
+    z-shape	-    Z shaped isomer (labove-rabove-lbelow-rbelow)
+    x-shape	-    X shaped isomer (labove-rbelow-rabove-lbelow)
+    any	-    Nonspecific mixture of isomers
+-->
+<!ATTLIST PC-StereoSquarePlanar_parity value (
+        u-shape |
+        z-shape |
+        x-shape |
+        any |
+        unknown
+        ) #IMPLIED >
+
+
+<!--
+ Octahedral (OC-6) and Square Pyramid (SPY-5) StereoCenters
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoOctahedral (
+        PC-StereoOctahedral_center, 
+        PC-StereoOctahedral_top, 
+        PC-StereoOctahedral_bottom, 
+        PC-StereoOctahedral_labove, 
+        PC-StereoOctahedral_lbelow, 
+        PC-StereoOctahedral_rabove, 
+        PC-StereoOctahedral_rbelow)>
+
+<!--
+ Atom ID of Atom Center
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_center (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Top
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_top (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Bottom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_bottom (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Above the Plane on the Left
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_labove (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Below the Plane on the Left
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_lbelow (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Above the Plane on the Right
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_rabove (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Below the Plane on the Right
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoOctahedral_rbelow (%INTEGER;)>
+
+<!--
+ Trigonal BiPyramid (TBPY-4 and TBPY-5) StereoCenters
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid (
+        PC-StereoTrigonalBiPyramid_center, 
+        PC-StereoTrigonalBiPyramid_above, 
+        PC-StereoTrigonalBiPyramid_below, 
+        PC-StereoTrigonalBiPyramid_top, 
+        PC-StereoTrigonalBiPyramid_bottom, 
+        PC-StereoTrigonalBiPyramid_right)>
+
+<!--
+ Atom ID of Atom Center
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid_center (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Above the Plane
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid_above (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Below the Plane
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid_below (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Top
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid_top (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Bottom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid_bottom (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and to the Right
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTrigonalBiPyramid_right (%INTEGER;)>
+
+<!--
+ T-Shaped (TS-3) StereoCenters
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoTShape (
+        PC-StereoTShape_center, 
+        PC-StereoTShape_top, 
+        PC-StereoTShape_bottom, 
+        PC-StereoTShape_above)>
+
+<!--
+ Atom ID of Atom Center
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTShape_center (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Top
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTShape_top (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Bottom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTShape_bottom (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Above the Plane
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoTShape_above (%INTEGER;)>
+
+<!--
+ Pentagonal BiPyramid (PBPY-7) StereoCenters
+   [Using IUPAC Stereogenic Center recommendations and terminology]
+   [Note: "-1" can be used for the Atom Identifier to represent a lone-pair or implicit hydrogen]
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid (
+        PC-StereoPentagonalBiPyramid_center, 
+        PC-StereoPentagonalBiPyramid_top, 
+        PC-StereoPentagonalBiPyramid_bottom, 
+        PC-StereoPentagonalBiPyramid_left, 
+        PC-StereoPentagonalBiPyramid_labove, 
+        PC-StereoPentagonalBiPyramid_lbelow, 
+        PC-StereoPentagonalBiPyramid_rabove, 
+        PC-StereoPentagonalBiPyramid_rbelow)>
+
+<!--
+ Atom ID of Atom Center
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_center (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Top
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_top (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Bottom
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_bottom (%INTEGER;)>
+
+<!--
+ Atom ID of Atom In-Plane and at the Left
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_left (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Above the Plane on the Left
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_labove (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Below the Plane on the Left
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_lbelow (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Above the Plane on the Right
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_rabove (%INTEGER;)>
+
+<!--
+ Atom ID of Atom Below the Plane on the Right
+   Note: Atom ID's must be greater than "0"
+-->
+<!ELEMENT PC-StereoPentagonalBiPyramid_rbelow (%INTEGER;)>
+
diff --git a/dtd/NCBI_Project.dtd b/dtd/NCBI_Project.dtd
new file mode 100644
index 0000000..4d42013
--- /dev/null
+++ b/dtd/NCBI_Project.dtd
@@ -0,0 +1,95 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "proj.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Project.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Project_module PUBLIC "-//NCBI//NCBI Project Module//EN" "NCBI_Project.mod.dtd">
+%NCBI_Project_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_PubMed_module PUBLIC "-//NCBI//NCBI PubMed Module//EN" "NCBI_PubMed.mod.dtd">
+%NCBI_PubMed_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Project.mod.dtd b/dtd/NCBI_Project.mod.dtd
new file mode 100644
index 0000000..e2215fe
--- /dev/null
+++ b/dtd/NCBI_Project.mod.dtd
@@ -0,0 +1,158 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "proj.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Project"
+================================================= -->
+
+<!--
+$Revision: 6.3 $
+****************************************************************
+
+  NCBI Project Definition Module
+  by Jim Ostell and Jonathan Kans, 1998
+
+****************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Project,
+          Project-item -->
+
+<!-- Elements referenced from other modules:
+          Date FROM NCBI-General,
+          PubMedId FROM NCBI-Biblio,
+          Seq-id,
+          Seq-loc FROM NCBI-Seqloc,
+          Seq-annot,
+          Pubdesc FROM NCBI-Sequence,
+          Seq-entry FROM NCBI-Seqset,
+          Pubmed-entry FROM NCBI-PubMed -->
+<!-- ============================================ -->
+
+
+<!ELEMENT Project (
+        Project_descr?, 
+        Project_data)>
+
+<!ELEMENT Project_descr (Project-descr)>
+
+<!ELEMENT Project_data (Project-item)>
+
+
+<!ELEMENT Project-item (
+        Project-item_pmuid | 
+        Project-item_protuid | 
+        Project-item_nucuid | 
+        Project-item_sequid | 
+        Project-item_genomeuid | 
+        Project-item_structuid | 
+        Project-item_pmid | 
+        Project-item_protid | 
+        Project-item_nucid | 
+        Project-item_seqid | 
+        Project-item_genomeid | 
+        Project-item_structid | 
+        Project-item_pment | 
+        Project-item_protent | 
+        Project-item_nucent | 
+        Project-item_seqent | 
+        Project-item_genomeent | 
+        Project-item_structent | 
+        Project-item_seqannot | 
+        Project-item_loc | 
+        Project-item_proj)>
+
+<!ELEMENT Project-item_pmuid (Project-item_pmuid_E*)>
+
+
+<!ELEMENT Project-item_pmuid_E (%INTEGER;)>
+
+<!ELEMENT Project-item_protuid (Project-item_protuid_E*)>
+
+
+<!ELEMENT Project-item_protuid_E (%INTEGER;)>
+
+<!ELEMENT Project-item_nucuid (Project-item_nucuid_E*)>
+
+
+<!ELEMENT Project-item_nucuid_E (%INTEGER;)>
+
+<!ELEMENT Project-item_sequid (Project-item_sequid_E*)>
+
+
+<!ELEMENT Project-item_sequid_E (%INTEGER;)>
+
+<!ELEMENT Project-item_genomeuid (Project-item_genomeuid_E*)>
+
+
+<!ELEMENT Project-item_genomeuid_E (%INTEGER;)>
+
+<!ELEMENT Project-item_structuid (Project-item_structuid_E*)>
+
+
+<!ELEMENT Project-item_structuid_E (%INTEGER;)>
+
+<!ELEMENT Project-item_pmid (PubMedId*)>
+
+<!ELEMENT Project-item_protid (Seq-id*)>
+
+<!ELEMENT Project-item_nucid (Seq-id*)>
+
+<!ELEMENT Project-item_seqid (Seq-id*)>
+
+<!ELEMENT Project-item_genomeid (Seq-id*)>
+
+<!ELEMENT Project-item_structid EMPTY>
+
+<!ELEMENT Project-item_pment (Pubmed-entry*)>
+
+<!ELEMENT Project-item_protent (Seq-entry*)>
+
+<!ELEMENT Project-item_nucent (Seq-entry*)>
+
+<!ELEMENT Project-item_seqent (Seq-entry*)>
+
+<!ELEMENT Project-item_genomeent (Seq-entry*)>
+
+<!ELEMENT Project-item_structent EMPTY>
+
+<!ELEMENT Project-item_seqannot (Seq-annot*)>
+
+<!ELEMENT Project-item_loc (Seq-loc*)>
+
+<!ELEMENT Project-item_proj (Project*)>
+
+
+<!ELEMENT Project-descr (
+        Project-descr_id, 
+        Project-descr_name?, 
+        Project-descr_descr?)>
+
+<!ELEMENT Project-descr_id (Project-id*)>
+
+<!ELEMENT Project-descr_name (#PCDATA)>
+
+<!ELEMENT Project-descr_descr (Projdesc*)>
+
+
+<!ELEMENT Projdesc (
+        Projdesc_pub | 
+        Projdesc_date | 
+        Projdesc_comment | 
+        Projdesc_title)>
+
+<!ELEMENT Projdesc_pub (Pubdesc)>
+
+<!ELEMENT Projdesc_date (Date)>
+
+<!ELEMENT Projdesc_comment (#PCDATA)>
+
+<!ELEMENT Projdesc_title (#PCDATA)>
+
+
+<!ELEMENT Project-id (#PCDATA)>
+
diff --git a/dtd/NCBI_Protein.dtd b/dtd/NCBI_Protein.dtd
new file mode 100644
index 0000000..e8279ea
--- /dev/null
+++ b/dtd/NCBI_Protein.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Protein.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
diff --git a/dtd/NCBI_Protein.mod.dtd b/dtd/NCBI_Protein.mod.dtd
new file mode 100644
index 0000000..e833a5d
--- /dev/null
+++ b/dtd/NCBI_Protein.mod.dtd
@@ -0,0 +1,75 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Protein"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  NCBI Protein
+  by James Ostell, 1990
+  version 0.8
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Prot-ref -->
+
+<!-- Elements referenced from other modules:
+          Dbtag FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+*** Prot-ref ***********************************************
+*
+*  Reference to a protein name
+*
+-->
+<!ELEMENT Prot-ref (
+        Prot-ref_name?, 
+        Prot-ref_desc?, 
+        Prot-ref_ec?, 
+        Prot-ref_activity?, 
+        Prot-ref_db?, 
+        Prot-ref_processed?)>
+
+<!-- protein name -->
+<!ELEMENT Prot-ref_name (Prot-ref_name_E*)>
+
+
+<!ELEMENT Prot-ref_name_E (#PCDATA)>
+
+<!-- description (instead of name) -->
+<!ELEMENT Prot-ref_desc (#PCDATA)>
+
+<!-- E.C. number(s) -->
+<!ELEMENT Prot-ref_ec (Prot-ref_ec_E*)>
+
+
+<!ELEMENT Prot-ref_ec_E (#PCDATA)>
+
+<!-- activities -->
+<!ELEMENT Prot-ref_activity (Prot-ref_activity_E*)>
+
+
+<!ELEMENT Prot-ref_activity_E (#PCDATA)>
+
+<!-- ids in other dbases -->
+<!ELEMENT Prot-ref_db (Dbtag*)>
+<!-- processing status -->
+<!ELEMENT Prot-ref_processed %ENUM;>
+<!ATTLIST Prot-ref_processed value (
+        not-set |
+        preprotein |
+        mature |
+        signal-peptide |
+        transit-peptide
+        ) #REQUIRED >
+
+
diff --git a/dtd/NCBI_Pub.dtd b/dtd/NCBI_Pub.dtd
new file mode 100644
index 0000000..6a52954
--- /dev/null
+++ b/dtd/NCBI_Pub.dtd
@@ -0,0 +1,26 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pub.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Pub.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
diff --git a/dtd/NCBI_Pub.mod.dtd b/dtd/NCBI_Pub.mod.dtd
new file mode 100644
index 0000000..ca92c18
--- /dev/null
+++ b/dtd/NCBI_Pub.mod.dtd
@@ -0,0 +1,120 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pub.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Pub"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+********************************************************************
+
+  Publication common set
+  James Ostell, 1990
+
+  This is the base class definitions for Publications of all sorts
+
+  support for PubMedId added in 1996
+********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Pub,
+          Pub-set,
+          Pub-equiv -->
+
+<!-- Elements referenced from other modules:
+          Medline-entry FROM NCBI-Medline,
+          Cit-art,
+          Cit-jour,
+          Cit-book,
+          Cit-proc,
+          Cit-pat,
+          Id-pat,
+          Cit-gen,
+          Cit-let,
+          Cit-sub,
+          PubMedId FROM NCBI-Biblio -->
+<!-- ============================================ -->
+
+
+<!ELEMENT Pub (
+        Pub_gen | 
+        Pub_sub | 
+        Pub_medline | 
+        Pub_muid | 
+        Pub_article | 
+        Pub_journal | 
+        Pub_book | 
+        Pub_proc | 
+        Pub_patent | 
+        Pub_pat-id | 
+        Pub_man | 
+        Pub_equiv | 
+        Pub_pmid)>
+
+<!-- general or generic unparsed -->
+<!ELEMENT Pub_gen (Cit-gen)>
+
+<!-- submission -->
+<!ELEMENT Pub_sub (Cit-sub)>
+
+<!ELEMENT Pub_medline (Medline-entry)>
+
+<!-- medline uid -->
+<!ELEMENT Pub_muid (%INTEGER;)>
+
+<!ELEMENT Pub_article (Cit-art)>
+
+<!ELEMENT Pub_journal (Cit-jour)>
+
+<!ELEMENT Pub_book (Cit-book)>
+
+<!-- proceedings of a meeting -->
+<!ELEMENT Pub_proc (Cit-proc)>
+
+<!ELEMENT Pub_patent (Cit-pat)>
+
+<!-- identify a patent -->
+<!ELEMENT Pub_pat-id (Id-pat)>
+
+<!-- manuscript, thesis, or letter -->
+<!ELEMENT Pub_man (Cit-let)>
+
+<!-- to cite a variety of ways -->
+<!ELEMENT Pub_equiv (Pub-equiv)>
+
+<!-- PubMedId -->
+<!ELEMENT Pub_pmid (PubMedId)>
+
+<!-- equivalent identifiers for same citation -->
+<!ELEMENT Pub-equiv (Pub*)>
+
+
+<!ELEMENT Pub-set (
+        Pub-set_pub | 
+        Pub-set_medline | 
+        Pub-set_article | 
+        Pub-set_journal | 
+        Pub-set_book | 
+        Pub-set_proc | 
+        Pub-set_patent)>
+
+<!ELEMENT Pub-set_pub (Pub*)>
+
+<!ELEMENT Pub-set_medline (Medline-entry*)>
+
+<!ELEMENT Pub-set_article (Cit-art*)>
+
+<!ELEMENT Pub-set_journal (Cit-jour*)>
+
+<!ELEMENT Pub-set_book (Cit-book*)>
+
+<!-- proceedings of a meeting -->
+<!ELEMENT Pub-set_proc (Cit-proc*)>
+
+<!ELEMENT Pub-set_patent (Cit-pat*)>
+
diff --git a/dtd/NCBI_PubMed.dtd b/dtd/NCBI_PubMed.dtd
new file mode 100644
index 0000000..b272da6
--- /dev/null
+++ b/dtd/NCBI_PubMed.dtd
@@ -0,0 +1,26 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pubmed.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_PubMed.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_PubMed_module PUBLIC "-//NCBI//NCBI PubMed Module//EN" "NCBI_PubMed.mod.dtd">
+%NCBI_PubMed_module;
diff --git a/dtd/NCBI_PubMed.mod.dtd b/dtd/NCBI_PubMed.mod.dtd
new file mode 100644
index 0000000..4313a76
--- /dev/null
+++ b/dtd/NCBI_PubMed.mod.dtd
@@ -0,0 +1,64 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "pubmed.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-PubMed"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+**********************************************************************
+
+  PUBMED data definitions
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Pubmed-entry,
+          Pubmed-url -->
+
+<!-- Elements referenced from other modules:
+          PubMedId FROM NCBI-Biblio,
+          Medline-entry FROM NCBI-Medline -->
+<!-- ============================================ -->
+
+<!--
+ a PubMed entry
+ PUBMED records must include the PubMedId
+-->
+<!ELEMENT Pubmed-entry (
+        Pubmed-entry_pmid, 
+        Pubmed-entry_medent?, 
+        Pubmed-entry_publisher?, 
+        Pubmed-entry_urls?, 
+        Pubmed-entry_pubid?)>
+
+<!ELEMENT Pubmed-entry_pmid (PubMedId)>
+
+<!-- Medline entry information -->
+<!ELEMENT Pubmed-entry_medent (Medline-entry)>
+
+<!-- Publisher name -->
+<!ELEMENT Pubmed-entry_publisher (#PCDATA)>
+
+<!-- List of URL to publisher cite -->
+<!ELEMENT Pubmed-entry_urls (Pubmed-url*)>
+
+<!-- Publisher's article identifier -->
+<!ELEMENT Pubmed-entry_pubid (#PCDATA)>
+
+
+<!ELEMENT Pubmed-url (
+        Pubmed-url_location?, 
+        Pubmed-url_url)>
+
+<!-- Location code -->
+<!ELEMENT Pubmed-url_location (#PCDATA)>
+
+<!-- Selected URL for location -->
+<!ELEMENT Pubmed-url_url (#PCDATA)>
+
diff --git a/dtd/NCBI_RNA.dtd b/dtd/NCBI_RNA.dtd
new file mode 100644
index 0000000..c64fad9
--- /dev/null
+++ b/dtd/NCBI_RNA.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_RNA.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_RNA.mod.dtd b/dtd/NCBI_RNA.mod.dtd
new file mode 100644
index 0000000..b1c7991
--- /dev/null
+++ b/dtd/NCBI_RNA.mod.dtd
@@ -0,0 +1,144 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 09/15/2008 23:08:25
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-RNA"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  NCBI RNAs
+  by James Ostell, 1990
+  version 0.8
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          RNA-ref,
+          Trna-ext,
+          RNA-gen,
+          RNA-qual,
+          RNA-qual-set -->
+
+<!-- Elements referenced from other modules:
+          Seq-loc FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+<!--
+*** rnas ***********************************************
+*
+*  various rnas
+*
+ minimal RNA sequence
+-->
+<!ELEMENT RNA-ref (
+        RNA-ref_type, 
+        RNA-ref_pseudo?, 
+        RNA-ref_ext?)>
+<!-- type of RNA feature -->
+<!ELEMENT RNA-ref_type %ENUM;>
+
+<!--
+    snRNA	-  will become ncRNA, with RNA-gen.class = snRNA
+    scRNA	-  will become ncRNA, with RNA-gen.class = scRNA
+    snoRNA	-  will become ncRNA, with RNA-gen.class = snoRNA
+    ncRNA	-  non-coding RNA; subsumes snRNA, scRNA, snoRNA
+-->
+<!ATTLIST RNA-ref_type value (
+        unknown |
+        premsg |
+        mRNA |
+        tRNA |
+        rRNA |
+        snRNA |
+        scRNA |
+        snoRNA |
+        ncRNA |
+        tmRNA |
+        miscRNA |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT RNA-ref_pseudo EMPTY>
+<!ATTLIST RNA-ref_pseudo value ( true | false ) #REQUIRED >
+
+
+<!-- generic fields for ncRNA, tmRNA, miscRNA -->
+<!ELEMENT RNA-ref_ext (
+        RNA-ref_ext_name | 
+        RNA-ref_ext_tRNA | 
+        RNA-ref_ext_gen)>
+
+<!-- for naming "other" type -->
+<!ELEMENT RNA-ref_ext_name (#PCDATA)>
+
+<!-- for tRNAs -->
+<!ELEMENT RNA-ref_ext_tRNA (Trna-ext)>
+
+<!ELEMENT RNA-ref_ext_gen (RNA-gen)>
+
+<!-- tRNA feature extensions -->
+<!ELEMENT Trna-ext (
+        Trna-ext_aa?, 
+        Trna-ext_codon?, 
+        Trna-ext_anticodon?)>
+<!-- aa this carries -->
+<!ELEMENT Trna-ext_aa (
+        Trna-ext_aa_iupacaa | 
+        Trna-ext_aa_ncbieaa | 
+        Trna-ext_aa_ncbi8aa | 
+        Trna-ext_aa_ncbistdaa)>
+
+<!ELEMENT Trna-ext_aa_iupacaa (%INTEGER;)>
+
+<!ELEMENT Trna-ext_aa_ncbieaa (%INTEGER;)>
+
+<!ELEMENT Trna-ext_aa_ncbi8aa (%INTEGER;)>
+
+<!ELEMENT Trna-ext_aa_ncbistdaa (%INTEGER;)>
+
+<!-- codon(s) as in Genetic-code -->
+<!ELEMENT Trna-ext_codon (Trna-ext_codon_E*)>
+
+
+<!ELEMENT Trna-ext_codon_E (%INTEGER;)>
+
+<!-- location of anticodon -->
+<!ELEMENT Trna-ext_anticodon (Seq-loc)>
+
+
+<!ELEMENT RNA-gen (
+        RNA-gen_class?, 
+        RNA-gen_product?, 
+        RNA-gen_quals?)>
+
+<!--
+ for ncRNAs, the class of non-coding RNA:
+ examples: antisense_RNA, guide_RNA, snRNA
+-->
+<!ELEMENT RNA-gen_class (#PCDATA)>
+
+<!ELEMENT RNA-gen_product (#PCDATA)>
+
+<!-- e.g., tag_peptide qualifier for tmRNAs -->
+<!ELEMENT RNA-gen_quals (RNA-qual-set)>
+
+<!-- Additional data values for RNA-gen, -->
+<!ELEMENT RNA-qual (
+        RNA-qual_qual, 
+        RNA-qual_val)>
+
+<!-- in a tag (qual), value (val) format -->
+<!ELEMENT RNA-qual_qual (#PCDATA)>
+
+<!ELEMENT RNA-qual_val (#PCDATA)>
+
+
+<!ELEMENT RNA-qual-set (RNA-qual*)>
+
diff --git a/dtd/NCBI_Remap.dtd b/dtd/NCBI_Remap.dtd
new file mode 100644
index 0000000..4696a50
--- /dev/null
+++ b/dtd/NCBI_Remap.dtd
@@ -0,0 +1,89 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "remap.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Remap.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Remap_module PUBLIC "-//NCBI//NCBI Remap Module//EN" "NCBI_Remap.mod.dtd">
+%NCBI_Remap_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Remap.mod.dtd b/dtd/NCBI_Remap.mod.dtd
new file mode 100644
index 0000000..9f14d35
--- /dev/null
+++ b/dtd/NCBI_Remap.mod.dtd
@@ -0,0 +1,158 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "remap.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Remap"
+================================================= -->
+
+<!--
+$Id: remap.asn,v 1.2 2004/07/28 13:43:33 jcherry Exp $********************************************
+
+  remap.asn
+   Version 1
+
+   API for remapping locations on sequences
+
+   Author: Josh Cherry
+
+***************************************************************
+-->
+
+<!-- Elements referenced from other modules:
+          Seq-loc FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+<!-- a date/time stamp -->
+<!ELEMENT Remap-dt (%INTEGER;)>
+
+<!-- database name -->
+<!ELEMENT Remap-db-id (#PCDATA)>
+
+<!--
+***************************************
+  Remap Request types
+***************************************
+****************************************
+ The basic request wrapper leaves space for a version which
+   allow the server to support older clients
+ The tool parameter allows us to log the client types for
+   debugging and tuning
+****************************************
+ a standard request
+-->
+<!ELEMENT Remap-request (
+        Remap-request_request, 
+        Remap-request_version, 
+        Remap-request_tool?)>
+
+<!-- the actual request -->
+<!ELEMENT Remap-request_request (RMRequest)>
+
+<!-- ASN1 spec version -->
+<!ELEMENT Remap-request_version (%INTEGER;)>
+
+<!-- tool making request -->
+<!ELEMENT Remap-request_tool (#PCDATA)>
+
+<!-- request types -->
+<!ELEMENT RMRequest (
+        RMRequest_remap | 
+        RMRequest_maps-to-builds | 
+        RMRequest_maps-from-builds | 
+        RMRequest_all-builds)>
+
+<!-- do the actual remapping -->
+<!ELEMENT RMRequest_remap (Remap-query)>
+
+<!-- what builds can this be mapped to? -->
+<!ELEMENT RMRequest_maps-to-builds (#PCDATA)>
+
+<!-- what builds can be mapped to this? -->
+<!ELEMENT RMRequest_maps-from-builds (#PCDATA)>
+
+<!-- all the builds the server knows of -->
+<!ELEMENT RMRequest_all-builds EMPTY>
+
+
+<!ELEMENT Remap-query (
+        Remap-query_from-build, 
+        Remap-query_to-build, 
+        Remap-query_locs)>
+
+<!-- build to map from -->
+<!ELEMENT Remap-query_from-build (#PCDATA)>
+
+<!-- build to map to -->
+<!ELEMENT Remap-query_to-build (#PCDATA)>
+
+<!-- the locations to remap -->
+<!ELEMENT Remap-query_locs (Seq-loc*)>
+
+<!--
+**********************************************************
+ Replies from the server
+  all replies contain the date/time stamp when they were executed
+**********************************************************
+-->
+<!ELEMENT Remap-reply (
+        Remap-reply_reply, 
+        Remap-reply_dt, 
+        Remap-reply_server, 
+        Remap-reply_msg?)>
+
+<!-- the actual reply -->
+<!ELEMENT Remap-reply_reply (RMReply)>
+
+<!-- date/time stamp from server -->
+<!ELEMENT Remap-reply_dt (Remap-dt)>
+
+<!-- server version info -->
+<!ELEMENT Remap-reply_server (#PCDATA)>
+
+<!-- possibly a message to the user -->
+<!ELEMENT Remap-reply_msg (#PCDATA)>
+
+
+<!ELEMENT RMReply (
+        RMReply_error | 
+        RMReply_remap | 
+        RMReply_maps-to-builds | 
+        RMReply_maps-from-builds | 
+        RMReply_all-builds)>
+
+<!-- if nothing can be returned -->
+<!ELEMENT RMReply_error (#PCDATA)>
+
+<!-- result of actual remapping -->
+<!ELEMENT RMReply_remap (Remap-result)>
+
+<!--
+ all the builds that the server
+ knows how to map this build to
+-->
+<!ELEMENT RMReply_maps-to-builds (RMReply_maps-to-builds_E*)>
+
+
+<!ELEMENT RMReply_maps-to-builds_E (#PCDATA)>
+
+<!--
+ all the builds that the server
+ knows how to map to this build
+-->
+<!ELEMENT RMReply_maps-from-builds (RMReply_maps-from-builds_E*)>
+
+
+<!ELEMENT RMReply_maps-from-builds_E (#PCDATA)>
+
+<!-- all builds that the server knows of -->
+<!ELEMENT RMReply_all-builds (RMReply_all-builds_E*)>
+
+
+<!ELEMENT RMReply_all-builds_E (#PCDATA)>
+
+<!-- remapped locations -->
+<!ELEMENT Remap-result (Seq-loc*)>
+
diff --git a/dtd/NCBI_Rsite.dtd b/dtd/NCBI_Rsite.dtd
new file mode 100644
index 0000000..7bcf4de
--- /dev/null
+++ b/dtd/NCBI_Rsite.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_Rsite.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
diff --git a/dtd/NCBI_Rsite.mod.dtd b/dtd/NCBI_Rsite.mod.dtd
new file mode 100644
index 0000000..1758ab1
--- /dev/null
+++ b/dtd/NCBI_Rsite.mod.dtd
@@ -0,0 +1,38 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Rsite"
+================================================= -->
+
+<!--
+**********************************************************************
+
+  NCBI Restriction Sites
+  by James Ostell, 1990
+  version 0.8
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Rsite-ref -->
+
+<!-- Elements referenced from other modules:
+          Dbtag FROM NCBI-General -->
+<!-- ============================================ -->
+
+
+<!ELEMENT Rsite-ref (
+        Rsite-ref_str | 
+        Rsite-ref_db)>
+
+<!-- may be unparsable -->
+<!ELEMENT Rsite-ref_str (#PCDATA)>
+
+<!-- pointer to a restriction site database -->
+<!ELEMENT Rsite-ref_db (Dbtag)>
+
diff --git a/dtd/NCBI_ScoreMat.dtd b/dtd/NCBI_ScoreMat.dtd
new file mode 100644
index 0000000..64a676b
--- /dev/null
+++ b/dtd/NCBI_ScoreMat.dtd
@@ -0,0 +1,92 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "scoremat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_ScoreMat.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_ScoreMat_module PUBLIC "-//NCBI//NCBI ScoreMat Module//EN" "NCBI_ScoreMat.mod.dtd">
+%NCBI_ScoreMat_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_ScoreMat.mod.dtd b/dtd/NCBI_ScoreMat.mod.dtd
new file mode 100644
index 0000000..d79b8e0
--- /dev/null
+++ b/dtd/NCBI_ScoreMat.mod.dtd
@@ -0,0 +1,579 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "scoremat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 03/06/2012 23:04:40
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-ScoreMat"
+================================================= -->
+
+<!--
+$Id: scoremat.asn 347837 2011-12-21 15:28:42Z boratyng $
+ ===========================================================================
+
+                            PUBLIC DOMAIN NOTICE
+               National Center for Biotechnology Information
+
+  This software/database is a "United States Government Work" under the
+  terms of the United States Copyright Act.  It was written as part of
+  the author's official duties as a United States Government employee and
+  thus cannot be copyrighted.  This software/database is freely available
+  to the public for use. The National Library of Medicine and the U.S.
+  Government have not placed any restriction on its use or reproduction.
+
+  Although all reasonable efforts have been taken to ensure the accuracy
+  and reliability of the software and data, the NLM and the U.S.
+  Government do not and cannot warrant the performance or results that
+  may be obtained by using this software or data. The NLM and the U.S.
+  Government disclaim all warranties, express or implied, including
+  warranties of performance, merchantability or fitness for any particular
+  purpose.
+
+  Please cite the author in any work or product based on this material.
+
+ ===========================================================================
+
+ Author:  Christiam Camacho
+
+ File Description:
+      ASN.1 definitions for scoring matrix
+
+ ===========================================================================
+-->
+
+<!-- Elements used by other modules:
+          Pssm,
+          PssmIntermediateData,
+          PssmFinalData,
+          PssmParameters,
+          PssmWithParameters -->
+
+<!-- Elements referenced from other modules:
+          Object-id FROM NCBI-General,
+          Seq-entry FROM NCBI-Seqset -->
+<!-- ============================================ -->
+
+<!--
+ a rudimentary block/core-model, to be used with block-based alignment 
+ routines and threading
+-->
+<!ELEMENT BlockProperty (
+        BlockProperty_type, 
+        BlockProperty_intvalue?, 
+        BlockProperty_textvalue?)>
+
+<!ELEMENT BlockProperty_type (%INTEGER;)>
+
+<!--
+    threshold	-  score threshold for heuristics
+    minscore	-  observed minimum score in CD
+    maxscore	-  observed maximum score in CD
+    meanscore	-  observed mean score in CD
+    variance	-  observed score variance
+    name	-  just name the block
+    is-optional	-  block may not have to be used    
+-->
+<!ATTLIST BlockProperty_type value (
+        unassigned |
+        threshold |
+        minscore |
+        maxscore |
+        meanscore |
+        variance |
+        name |
+        is-optional |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT BlockProperty_intvalue (%INTEGER;)>
+
+<!ELEMENT BlockProperty_textvalue (#PCDATA)>
+
+
+<!ELEMENT CoreBlock (
+        CoreBlock_start, 
+        CoreBlock_stop, 
+        CoreBlock_minstart?, 
+        CoreBlock_maxstop?, 
+        CoreBlock_property?)>
+
+<!-- begin of block on query -->
+<!ELEMENT CoreBlock_start (%INTEGER;)>
+
+<!-- end of block on query -->
+<!ELEMENT CoreBlock_stop (%INTEGER;)>
+
+<!-- optional N-terminal extension -->
+<!ELEMENT CoreBlock_minstart (%INTEGER;)>
+
+<!-- optional C-terminal extension -->
+<!ELEMENT CoreBlock_maxstop (%INTEGER;)>
+
+<!ELEMENT CoreBlock_property (BlockProperty*)>
+
+
+<!ELEMENT LoopConstraint (
+        LoopConstraint_minlength?, 
+        LoopConstraint_maxlength?)>
+
+<!-- minimum length of unaligned region -->
+<!ELEMENT LoopConstraint_minlength (%INTEGER;)>
+
+<!-- maximum length of unaligned region -->
+<!ELEMENT LoopConstraint_maxlength (%INTEGER;)>
+
+
+<!ELEMENT CoreDef (
+        CoreDef_nblocks, 
+        CoreDef_blocks, 
+        CoreDef_loops, 
+        CoreDef_isDiscontinuous?, 
+        CoreDef_insertions?)>
+
+<!-- number of core elements/blocks -->
+<!ELEMENT CoreDef_nblocks (%INTEGER;)>
+
+<!-- nblocks locations -->
+<!ELEMENT CoreDef_blocks (CoreBlock*)>
+
+<!-- (nblocks+1) constraints -->
+<!ELEMENT CoreDef_loops (LoopConstraint*)>
+
+<!-- is it a discontinuous domain -->
+<!ELEMENT CoreDef_isDiscontinuous EMPTY>
+<!ATTLIST CoreDef_isDiscontinuous value ( true | false ) #REQUIRED >
+
+
+<!-- positions of long insertions -->
+<!ELEMENT CoreDef_insertions (CoreDef_insertions_E*)>
+
+
+<!ELEMENT CoreDef_insertions_E (%INTEGER;)>
+
+
+<!ELEMENT Site-annot (
+        Site-annot_startPosition, 
+        Site-annot_stopPosition, 
+        Site-annot_description?, 
+        Site-annot_type?, 
+        Site-annot_aliases?, 
+        Site-annot_motif?, 
+        Site-annot_motifuse?)>
+
+<!-- location of the annotation, -->
+<!ELEMENT Site-annot_startPosition (%INTEGER;)>
+
+<!--
+ start and stop position in the
+ PSSM
+-->
+<!ELEMENT Site-annot_stopPosition (%INTEGER;)>
+
+<!--
+ holds description or names, that
+ can be used for labels in
+ visualization
+-->
+<!ELEMENT Site-annot_description (#PCDATA)>
+
+<!--
+ type of the annotated feature,
+ similarly to Align-annot in
+ NCBI-Cdd
+-->
+<!ELEMENT Site-annot_type (%INTEGER;)>
+
+<!--
+ additional names for
+ the annotation
+-->
+<!ELEMENT Site-annot_aliases (Site-annot_aliases_E*)>
+
+
+<!ELEMENT Site-annot_aliases_E (#PCDATA)>
+
+<!-- motif to validate mapping of sites -->
+<!ELEMENT Site-annot_motif (#PCDATA)>
+
+<!--
+ 0 for validation
+ 1 for motif in seqloc
+ 2 for multiple motifs in seqloc
+-->
+<!ELEMENT Site-annot_motifuse (%INTEGER;)>
+
+
+<!ELEMENT Site-annot-set (Site-annot*)>
+
+<!--
+ ===========================================================================
+ PSI-BLAST, formatrpsdb, RPS-BLAST workflow:
+ ===========================================
+
+ Two possible inputs to PSI-BLAST and formatrpsdb:
+ 1) PssmWithParams where pssm field contains intermediate PSSM data (matrix 
+    of frequency ratios)
+ 2) PssmWithParams where pssm field contains final PSSM data (matrix of 
+    scores and statistical parameters) - such as written by cddumper
+
+ In case 1, PSI-BLAST's PSSM engine is invoked to create the PSSM and perform
+ the PSI-BLAST search or build the PSSM to then build the RPS-BLAST database.
+ In case 2, PSI-BLAST's PSSM engine is not invoked and the matrix of scores
+ statistical parameters are used to perform the search in PSI-BLAST and the
+ same data and the data in PssmWithParams::params::rpsdbparams is used to
+ build the PSSM and ultimately the RPS-BLAST database
+ 
+ 
+                 reads    ++++++++++++++ writes
+ PssmWithParams  ====>    + PSI-BLAST  + =====> PssmWithParams
+                          ++++++++++++++             |  ^
+         ^                                           |  |
+         |                                           |  |
+         +===========================================+  |
+                                                     |  |
+         +===========================================+  |
+         |                                              |
+ reads   |                                              | 
+         v                                              |
+  +++++++++++++++ writes +++++++++++++++++++++++        |
+  | formatrpsdb | =====> | RPS-BLAST databases |        |
+  +++++++++++++++        +++++++++++++++++++++++        |
+                                   ^                    |
+                                   |                    |
+                                   | reads              |
+                             +++++++++++++              |
+                             | RPS-BLAST |              |
+                             +++++++++++++              |
+                                                        |
+       reads  ++++++++++++               writes         |
+  Cdd ======> | cddumper | =============================+
+              ++++++++++++
+
+ ===========================================================================
+ Contains the PSSM's scores and its associated statistical parameters. 
+ Dimensions and order in which scores are stored must be the same as that 
+ specified in Pssm::numRows, Pssm::numColumns, and Pssm::byrow
+-->
+<!ELEMENT PssmFinalData (
+        PssmFinalData_scores, 
+        PssmFinalData_lambda, 
+        PssmFinalData_kappa, 
+        PssmFinalData_h, 
+        PssmFinalData_scalingFactor?, 
+        PssmFinalData_lambdaUngapped?, 
+        PssmFinalData_kappaUngapped?, 
+        PssmFinalData_hUngapped?)>
+
+<!-- PSSM's scores -->
+<!ELEMENT PssmFinalData_scores (PssmFinalData_scores_E*)>
+
+
+<!ELEMENT PssmFinalData_scores_E (%INTEGER;)>
+
+<!-- Karlin & Altschul parameter produced during the PSSM's calculation -->
+<!ELEMENT PssmFinalData_lambda (%REAL;)>
+
+<!-- Karlin & Altschul parameter produced during the PSSM's calculation -->
+<!ELEMENT PssmFinalData_kappa (%REAL;)>
+
+<!-- Karlin & Altschul parameter produced during the PSSM's calculation -->
+<!ELEMENT PssmFinalData_h (%REAL;)>
+
+<!--
+ scaling factor used to obtain more precision when building the PSSM.
+ (i.e.: scores are scaled by this value). By default, PSI-BLAST's PSSM
+ engine generates PSSMs which are not scaled-up, however, if PSI-BLAST is
+ given a PSSM which contains a scaled-up PSSM (indicated by having a
+ scalingFactor greater than 1), then it will scale down the PSSM to
+ perform the initial stages of the search with it.
+ N.B.: When building RPS-BLAST databases, if formatrpsdb is provided 
+ scaled-up PSSMs, it will ensure that all PSSMs used to build the 
+ RPS-BLAST database are scaled by the same factor (otherwise, RPS-BLAST 
+ will silently produce incorrect results).
+-->
+<!ELEMENT PssmFinalData_scalingFactor (%INTEGER;)>
+
+<!-- Karlin & Altschul parameter produced during the PSSM's calculation -->
+<!ELEMENT PssmFinalData_lambdaUngapped (%REAL;)>
+
+<!-- Karlin & Altschul parameter produced during the PSSM's calculation -->
+<!ELEMENT PssmFinalData_kappaUngapped (%REAL;)>
+
+<!-- Karlin & Altschul parameter produced during the PSSM's calculation -->
+<!ELEMENT PssmFinalData_hUngapped (%REAL;)>
+
+<!--
+ Contains the PSSM's intermediate data used to create the PSSM's scores 
+ and statistical parameters. Dimensions and order in which scores are 
+ stored must be the same as that specified in Pssm::numRows, 
+ Pssm::numColumns, and Pssm::byrow
+-->
+<!ELEMENT PssmIntermediateData (
+        PssmIntermediateData_resFreqsPerPos?, 
+        PssmIntermediateData_weightedResFreqsPerPos?, 
+        PssmIntermediateData_freqRatios, 
+        PssmIntermediateData_informationContent?, 
+        PssmIntermediateData_gaplessColumnWeights?, 
+        PssmIntermediateData_sigma?, 
+        PssmIntermediateData_intervalSizes?, 
+        PssmIntermediateData_numMatchingSeqs?, 
+        PssmIntermediateData_numIndeptObsr?)>
+
+<!--
+ observed residue frequencies (or counts) per position of the PSSM 
+ (prior to application of pseudocounts)
+-->
+<!ELEMENT PssmIntermediateData_resFreqsPerPos (PssmIntermediateData_resFreqsPerPos_E*)>
+
+
+<!ELEMENT PssmIntermediateData_resFreqsPerPos_E (%INTEGER;)>
+
+<!--
+ Weighted observed residue frequencies per position of the PSSM.
+ (N.B.: each position's weights should add up to 1.0).
+ This field corresponds to f_i (f sub i) in equation 2 of 
+ Nucleic Acids Res. 2001 Jul 15;29(14):2994-3005.
+ NOTE: this is needed for diagnostics information only (i.e.:
+ -out_ascii_pssm option in psiblast)
+-->
+<!ELEMENT PssmIntermediateData_weightedResFreqsPerPos (PssmIntermediateData_weightedResFreqsPerPos_E*)>
+
+
+<!ELEMENT PssmIntermediateData_weightedResFreqsPerPos_E (%REAL;)>
+
+<!-- PSSM's frequency ratios -->
+<!ELEMENT PssmIntermediateData_freqRatios (PssmIntermediateData_freqRatios_E*)>
+
+
+<!ELEMENT PssmIntermediateData_freqRatios_E (%REAL;)>
+
+<!--
+ Information content per position of the PSSM
+ NOTE: this is needed for diagnostics information only (i.e.:
+ -out_ascii_pssm option in psiblast)
+-->
+<!ELEMENT PssmIntermediateData_informationContent (PssmIntermediateData_informationContent_E*)>
+
+
+<!ELEMENT PssmIntermediateData_informationContent_E (%REAL;)>
+
+<!--
+ Relative weight for columns of the PSSM without gaps to pseudocounts
+ NOTE: this is needed for diagnostics information only (i.e.:
+ -out_ascii_pssm option in psiblast)
+-->
+<!ELEMENT PssmIntermediateData_gaplessColumnWeights (PssmIntermediateData_gaplessColumnWeights_E*)>
+
+
+<!ELEMENT PssmIntermediateData_gaplessColumnWeights_E (%REAL;)>
+
+<!--
+ Used in sequence weights computation
+ NOTE: this is needed for diagnostics information only (i.e.:
+ -out_ascii_pssm option in psiblast)
+-->
+<!ELEMENT PssmIntermediateData_sigma (PssmIntermediateData_sigma_E*)>
+
+
+<!ELEMENT PssmIntermediateData_sigma_E (%REAL;)>
+
+<!--
+ Length of the aligned regions per position of the query sequence
+ NOTE: this is needed for diagnostics information only (i.e.:
+ -out_ascii_pssm option in psiblast)
+-->
+<!ELEMENT PssmIntermediateData_intervalSizes (PssmIntermediateData_intervalSizes_E*)>
+
+
+<!ELEMENT PssmIntermediateData_intervalSizes_E (%INTEGER;)>
+
+<!--
+ Number of matching sequences per position of the PSSM (including the
+ query)
+ NOTE: this is needed for diagnostics information only (i.e.:
+ -out_ascii_pssm option in psiblast)
+-->
+<!ELEMENT PssmIntermediateData_numMatchingSeqs (PssmIntermediateData_numMatchingSeqs_E*)>
+
+
+<!ELEMENT PssmIntermediateData_numMatchingSeqs_E (%INTEGER;)>
+
+<!--
+ Number of independent observations per position of the PSSM
+ NOTE: this is needed for building CDD database for DELTA-BLAST
+-->
+<!ELEMENT PssmIntermediateData_numIndeptObsr (PssmIntermediateData_numIndeptObsr_E*)>
+
+
+<!ELEMENT PssmIntermediateData_numIndeptObsr_E (%REAL;)>
+
+<!--
+ Position-specific scoring matrix
+
+ Column indices on the PSSM refer to the positions corresponding to the
+ query/master sequence, i.e. the number of columns (N) is the same
+ as the length of the query/master sequence. 
+ Row indices refer to individual amino acid types, i.e. the number of 
+ rows (M) is the same as the number of different residues in the 
+ alphabet we use. Consequently, row labels are amino acid identifiers.
+
+ PSSMs are stored as linear arrays of integers. By default, we store
+ them column-by-column, M values for the first column followed by M
+ values for the second column, and so on. In order to provide
+ flexibility for external applications, the boolean field "byrow" is 
+ provided to specify the storage order.
+-->
+<!ELEMENT Pssm (
+        Pssm_isProtein?, 
+        Pssm_identifier?, 
+        Pssm_numRows, 
+        Pssm_numColumns, 
+        Pssm_rowLabels?, 
+        Pssm_byRow?, 
+        Pssm_query?, 
+        Pssm_intermediateData?, 
+        Pssm_finalData?)>
+
+<!-- Is the this a protein or nucleotide scoring matrix? -->
+<!ELEMENT Pssm_isProtein EMPTY>
+<!ATTLIST Pssm_isProtein value ( true | false ) "true" >
+
+
+<!-- PSSM identifier -->
+<!ELEMENT Pssm_identifier (Object-id)>
+
+<!--
+ The dimensions of the matrix are returned so the client can
+ verify that all data was received.
+ number of rows
+-->
+<!ELEMENT Pssm_numRows (%INTEGER;)>
+
+<!-- number of columns -->
+<!ELEMENT Pssm_numColumns (%INTEGER;)>
+
+<!--
+ row-labels is given to note the order of residue types so that it can
+ be cross-checked between applications.
+ If this field is not given, the matrix values are presented in 
+ order of the alphabet ncbistdaa is used for protein, ncbi4na for nucl.
+ for proteins the values returned correspond to 
+ (-,-), (-,A), (-,B), (-,C) ... (A,-), (A,A), (A,B), (A,C) ...
+-->
+<!ELEMENT Pssm_rowLabels (Pssm_rowLabels_E*)>
+
+
+<!ELEMENT Pssm_rowLabels_E (#PCDATA)>
+
+<!-- are matrices stored row by row? -->
+<!ELEMENT Pssm_byRow EMPTY>
+<!ATTLIST Pssm_byRow value ( true | false ) "false" >
+
+
+<!-- PSSM representative sequence (master)  -->
+<!ELEMENT Pssm_query (Seq-entry)>
+
+<!--
+ both intermediateData and finalData can be provided, but at least one of
+ them must be provided.
+ N.B.: by default PSI-BLAST will return the PSSM in its PssmIntermediateData 
+ representation. 
+ Intermediate or final data for the PSSM
+-->
+<!ELEMENT Pssm_intermediateData (PssmIntermediateData)>
+
+<!-- Final representation for the PSSM -->
+<!ELEMENT Pssm_finalData (PssmFinalData)>
+
+<!--
+ This structure is used to create the RPS-BLAST database auxiliary file 
+ (*.aux) and it contains parameters set at creation time of the PSSM.
+ Also, the matrixName field is used by formatrpsdb to build a PSSM from 
+ a Pssm structure which only contains PssmIntermediateData.
+-->
+<!ELEMENT FormatRpsDbParameters (
+        FormatRpsDbParameters_matrixName, 
+        FormatRpsDbParameters_gapOpen?, 
+        FormatRpsDbParameters_gapExtend?)>
+
+<!--
+ name of the underlying score matrix whose frequency ratios were
+ used in PSSM construction (e.g.: BLOSUM62)
+-->
+<!ELEMENT FormatRpsDbParameters_matrixName (#PCDATA)>
+
+<!-- gap opening penalty corresponding to the matrix above -->
+<!ELEMENT FormatRpsDbParameters_gapOpen (%INTEGER;)>
+
+<!-- gap extension penalty corresponding to the matrix above -->
+<!ELEMENT FormatRpsDbParameters_gapExtend (%INTEGER;)>
+
+<!--
+ Populated by PSSM engine of PSI-BLAST, original source for these values 
+ are the PSI-BLAST options specified using the BLAST options API
+-->
+<!ELEMENT PssmParameters (
+        PssmParameters_pseudocount?, 
+        PssmParameters_rpsdbparams?, 
+        PssmParameters_constraints?, 
+        PssmParameters_bitScoreThresh?, 
+        PssmParameters_annotatedSites?)>
+
+<!--
+ pseudocount constant used for PSSM. This field corresponds to beta in 
+ equation 2 of Nucleic Acids Res. 2001 Jul 15;29(14):2994-3005.
+-->
+<!ELEMENT PssmParameters_pseudocount (%INTEGER;)>
+
+<!--
+ data needed by formatrpsdb to create RPS-BLAST databases. matrixName is
+ populated by PSI-BLAST
+-->
+<!ELEMENT PssmParameters_rpsdbparams (FormatRpsDbParameters)>
+
+<!--
+ alignment constraints needed by sequence-structure threader
+ and other global or local block-alignment algorithms
+-->
+<!ELEMENT PssmParameters_constraints (CoreDef)>
+
+<!-- bit score threshold for specific conserved domain hits -->
+<!ELEMENT PssmParameters_bitScoreThresh (%REAL;)>
+
+<!-- conserved functional sites with annotations -->
+<!ELEMENT PssmParameters_annotatedSites (Site-annot-set)>
+
+<!--
+ Envelope containing PSSM and the parameters used to create it. 
+ Provided for use in PSI-BLAST, formatrpsdb, and for the structure group.
+-->
+<!ELEMENT PssmWithParameters (
+        PssmWithParameters_pssm, 
+        PssmWithParameters_params?)>
+
+<!--
+ This field is applicable to PSI-BLAST and formatrpsdb.
+ When both the intermediate and final PSSM data are provided in this
+ field, the final data (matrix of scores and associated statistical
+ parameters) takes precedence and that data is used for further
+ processing. The rationale for this is that the PSSM's scores and
+ statistical parameters might have been calculated by other applications
+ and it might not be possible to recreate it by using PSI-BLAST's PSSM 
+ engine.
+-->
+<!ELEMENT PssmWithParameters_pssm (Pssm)>
+
+<!--
+ This field's rpsdbparams is used to specify the values of options 
+ for processing by formatrpsdb. If these are not set, the command 
+ line defaults of formatrpsdb are applied. This field is used
+ by PSI-BLAST to verify that the underlying scorem matrix used to BUILD
+ the PSSM is the same as the one being specified through the BLAST
+ Options API. If this field is omitted, no verification will be
+ performed, so be careful to keep track of what matrix was used to build
+ the PSSM or else the results produced by PSI-BLAST will be unreliable.
+-->
+<!ELEMENT PssmWithParameters_params (PssmParameters)>
+
diff --git a/dtd/NCBI_SeqCode.dtd b/dtd/NCBI_SeqCode.dtd
new file mode 100644
index 0000000..3e754ac
--- /dev/null
+++ b/dtd/NCBI_SeqCode.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqcode.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_SeqCode.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_SeqCode_module PUBLIC "-//NCBI//NCBI SeqCode Module//EN" "NCBI_SeqCode.mod.dtd">
+%NCBI_SeqCode_module;
diff --git a/dtd/NCBI_SeqCode.mod.dtd b/dtd/NCBI_SeqCode.mod.dtd
new file mode 100644
index 0000000..1e60966
--- /dev/null
+++ b/dtd/NCBI_SeqCode.mod.dtd
@@ -0,0 +1,150 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqcode.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-SeqCode"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+  *********************************************************************
+
+  These are code and conversion tables for NCBI sequence codes
+  ASN.1 for the sequences themselves are define in seq.asn
+
+  Seq-map-table and Seq-code-table REQUIRE that codes start with 0
+    and increase continuously.  So IUPAC codes, which are upper case
+    letters will always have 65 0 cells before the codes begin.  This
+    allows all codes to do indexed lookups for things
+
+  Valid names for code tables are:
+    IUPACna
+    IUPACaa
+    IUPACeaa
+    IUPACaa3     3 letter amino acid codes : parallels IUPACeaa
+                   display only, not a data exchange type
+    NCBI2na
+    NCBI4na
+    NCBI8na
+    NCBI8aa
+    NCBIstdaa
+     probability types map to IUPAC types for display as characters
+-->
+
+<!-- Elements used by other modules:
+          Seq-code-table,
+          Seq-map-table,
+          Seq-code-set -->
+<!-- ============================================ -->
+
+<!-- sequence representations -->
+<!ELEMENT Seq-code-type %ENUM;>
+
+<!--
+    iupacna	-  IUPAC 1 letter nuc acid code
+    iupacaa	-  IUPAC 1 letter amino acid code
+    ncbi2na	-  2 bit nucleic acid code
+    ncbi4na	-  4 bit nucleic acid code
+    ncbi8na	-  8 bit extended nucleic acid code
+    ncbipna	-  nucleic acid probabilities
+    ncbi8aa	-  8 bit extended amino acid codes
+    ncbieaa	-  extended ASCII 1 letter aa codes
+    ncbipaa	-  amino acid probabilities
+    iupacaa3	-  3 letter code only for display
+    ncbistdaa	-  consecutive codes for std aas, 0-25
+-->
+<!ATTLIST Seq-code-type value (
+        iupacna |
+        iupacaa |
+        ncbi2na |
+        ncbi4na |
+        ncbi8na |
+        ncbipna |
+        ncbi8aa |
+        ncbieaa |
+        ncbipaa |
+        iupacaa3 |
+        ncbistdaa
+        ) #REQUIRED >
+
+
+<!-- for tables of sequence mappings  -->
+<!ELEMENT Seq-map-table (
+        Seq-map-table_from, 
+        Seq-map-table_to, 
+        Seq-map-table_num, 
+        Seq-map-table_start-at?, 
+        Seq-map-table_table)>
+
+<!-- code to map from -->
+<!ELEMENT Seq-map-table_from (Seq-code-type)>
+
+<!-- code to map to -->
+<!ELEMENT Seq-map-table_to (Seq-code-type)>
+
+<!-- number of rows in table -->
+<!ELEMENT Seq-map-table_num (%INTEGER;)>
+
+<!-- index offset of first element -->
+<!ELEMENT Seq-map-table_start-at (%INTEGER;)>
+
+<!-- table of values, in from-to order -->
+<!ELEMENT Seq-map-table_table (Seq-map-table_table_E*)>
+
+
+<!ELEMENT Seq-map-table_table_E (%INTEGER;)>
+
+<!-- for names of coded values -->
+<!ELEMENT Seq-code-table (
+        Seq-code-table_code, 
+        Seq-code-table_num, 
+        Seq-code-table_one-letter, 
+        Seq-code-table_start-at?, 
+        Seq-code-table_table, 
+        Seq-code-table_comps?)>
+
+<!-- name of code -->
+<!ELEMENT Seq-code-table_code (Seq-code-type)>
+
+<!-- number of rows in table -->
+<!ELEMENT Seq-code-table_num (%INTEGER;)>
+
+<!-- symbol is ALWAYS 1 letter? -->
+<!ELEMENT Seq-code-table_one-letter EMPTY>
+<!ATTLIST Seq-code-table_one-letter value ( true | false ) #REQUIRED >
+
+
+<!-- index offset of first element -->
+<!ELEMENT Seq-code-table_start-at (%INTEGER;)>
+
+<!-- an explanatory name or string -->
+<!ELEMENT Seq-code-table_table (Seq-code-table_table_E*)>
+
+
+<!ELEMENT Seq-code-table_table_E (
+        Seq-code-table_table_E_symbol, 
+        Seq-code-table_table_E_name)>
+
+<!-- the printed symbol or letter -->
+<!ELEMENT Seq-code-table_table_E_symbol (#PCDATA)>
+
+<!ELEMENT Seq-code-table_table_E_name (#PCDATA)>
+
+<!-- pointers to complement nuc acid -->
+<!ELEMENT Seq-code-table_comps (Seq-code-table_comps_E*)>
+
+
+<!ELEMENT Seq-code-table_comps_E (%INTEGER;)>
+
+<!-- for distribution -->
+<!ELEMENT Seq-code-set (
+        Seq-code-set_codes?, 
+        Seq-code-set_maps?)>
+
+<!ELEMENT Seq-code-set_codes (Seq-code-table*)>
+
+<!ELEMENT Seq-code-set_maps (Seq-map-table*)>
+
diff --git a/dtd/NCBI_SeqTable.dtd b/dtd/NCBI_SeqTable.dtd
new file mode 100644
index 0000000..f47d9ba
--- /dev/null
+++ b/dtd/NCBI_SeqTable.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqtable.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_SeqTable.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_SeqTable.mod.dtd b/dtd/NCBI_SeqTable.mod.dtd
new file mode 100644
index 0000000..54232b3
--- /dev/null
+++ b/dtd/NCBI_SeqTable.mod.dtd
@@ -0,0 +1,390 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqtable.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 01/23/2013 23:05:37
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-SeqTable"
+================================================= -->
+
+<!--
+$Revision: 386776 $
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+                            PUBLIC DOMAIN NOTICE
+                National Center for Biotechnology Information
+
+  This software/database is a "United States Government Work" under the terms
+  of the United States Copyright Act.  It was written as part of the author's
+  official duties as a United States Government employee and thus cannot be
+  copyrighted.  This software/database is freely available to the public for
+  use.  The National Library of Medicine and the U.S. Government have not
+  placed any restriction on its use or reproduction.
+
+  Although all reasonable efforts have been taken to ensure the accuracy and
+  reliability of the software and data, the NLM and the U.S. Government do not
+  and cannot warrant the performance or results that may be obtained by using
+  this software or data.  The NLM and the U.S. Government disclaim all
+  warranties, express or implied, including warranties of performance,
+  merchantability or fitness for any particular purpose.
+
+  Please cite the authors in any work or product based on this material.
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  Authors: Mike DiCuccio, Eugene Vasilchenko
+
+  ASN.1 interface to table readers
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+
+<!-- Elements used by other modules:
+          SeqTable-column-info,
+          SeqTable-column,
+          Seq-table -->
+
+<!-- Elements referenced from other modules:
+          Seq-id,
+          Seq-loc,
+          Seq-interval FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+
+<!ELEMENT SeqTable-column-info (
+        SeqTable-column-info_title?, 
+        SeqTable-column-info_field-id?, 
+        SeqTable-column-info_field-name?)>
+
+<!-- user friendly column name, can be skipped -->
+<!ELEMENT SeqTable-column-info_title (#PCDATA)>
+<!--
+ identification of the column data in the objects described by the table
+ known column data types
+ position types
+-->
+<!ELEMENT SeqTable-column-info_field-id (%INTEGER;)>
+
+<!--
+    location	-  location as Seq-loc
+    location-id	-  location Seq-id
+    location-gi	-  gi
+    location-from	-  interval from
+    location-to	-  interval to
+    location-strand	-  location strand
+    product	-  product as Seq-loc
+    product-id	-  product Seq-id
+    product-gi	-  product gi
+    product-from	-  product interval from
+    product-to	-  product interval to
+    product-strand	-  product strand
+    id-local	-  main feature fields
+         id.local.id
+    xref-id-local	-  xref.id.local.id
+    ext	-  field-name must be "E.xxx", see below
+    qual	-  field-name must be "Q.xxx", see below
+    dbxref	-  field-name must be "D.xxx", see below
+    data-imp-key	-  various data fields
+    ext-type	-  extra fields, see also special values for str below
+-->
+<!ATTLIST SeqTable-column-info_field-id value (
+        location |
+        location-id |
+        location-gi |
+        location-from |
+        location-to |
+        location-strand |
+        location-fuzz-from-lim |
+        location-fuzz-to-lim |
+        product |
+        product-id |
+        product-gi |
+        product-from |
+        product-to |
+        product-strand |
+        product-fuzz-from-lim |
+        product-fuzz-to-lim |
+        id-local |
+        xref-id-local |
+        partial |
+        comment |
+        title |
+        ext |
+        qual |
+        dbxref |
+        data-imp-key |
+        data-region |
+        data-cdregion-frame |
+        ext-type |
+        qual-qual |
+        qual-val |
+        dbxref-db |
+        dbxref-tag
+        ) #IMPLIED >
+
+
+<!--
+ any column can be identified by ASN.1 text locator string
+ with omitted object type.
+ examples:
+   "data.gene.locus" for Seq-feat.data.gene.locus
+   "data.imp.key" for Seq-feat.data.imp.key
+   "qual.qual"
+    - Seq-feat.qual is SEQUENCE so several columns are allowed
+      see also "Q.xxx" special value for shorter qual representation
+   "ext.type.str"
+   "ext.data.label.str"
+   "ext.data.data.int"
+      see also "E.xxx" special value for shorter ext representation
+ special values start with capital letter:
+   "E.xxx" - ext.data.label.str = xxx, ext.data.data = data
+    - Seq-feat.ext.data is SEQUENCE so several columns are allowed
+   "Q.xxx" - qual.qual = xxx, qual.val = data
+    - Seq-feat.qual is SEQUENCE so several columns are allowed
+   "D.xxx" - dbxref.id = xxx, dbxref.tag = data
+    - Seq-feat.dbxref is SET so several columns are allowed
+-->
+<!ELEMENT SeqTable-column-info_field-name (#PCDATA)>
+
+
+<!ELEMENT CommonString-table (
+        CommonString-table_strings, 
+        CommonString-table_indexes)>
+
+<!-- set of possible values -->
+<!ELEMENT CommonString-table_strings (CommonString-table_strings_E*)>
+
+
+<!ELEMENT CommonString-table_strings_E (#PCDATA)>
+
+<!-- indexes of values -->
+<!ELEMENT CommonString-table_indexes (CommonString-table_indexes_E*)>
+
+
+<!ELEMENT CommonString-table_indexes_E (%INTEGER;)>
+
+
+<!ELEMENT CommonBytes-table (
+        CommonBytes-table_bytes, 
+        CommonBytes-table_indexes)>
+
+<!-- set of possible values -->
+<!ELEMENT CommonBytes-table_bytes (CommonBytes-table_bytes_E*)>
+
+
+<!ELEMENT CommonBytes-table_bytes_E (%OCTETS;)>
+
+<!-- indexes of values -->
+<!ELEMENT CommonBytes-table_indexes (CommonBytes-table_indexes_E*)>
+
+
+<!ELEMENT CommonBytes-table_indexes_E (%INTEGER;)>
+
+
+<!ELEMENT SeqTable-multi-data (
+        SeqTable-multi-data_int | 
+        SeqTable-multi-data_real | 
+        SeqTable-multi-data_string | 
+        SeqTable-multi-data_bytes | 
+        SeqTable-multi-data_common-string | 
+        SeqTable-multi-data_common-bytes | 
+        SeqTable-multi-data_bit | 
+        SeqTable-multi-data_loc | 
+        SeqTable-multi-data_id | 
+        SeqTable-multi-data_interval)>
+
+<!-- a set of integers, one per row -->
+<!ELEMENT SeqTable-multi-data_int (SeqTable-multi-data_int_E*)>
+
+
+<!ELEMENT SeqTable-multi-data_int_E (%INTEGER;)>
+
+<!-- a set of reals, one per row -->
+<!ELEMENT SeqTable-multi-data_real (SeqTable-multi-data_real_E*)>
+
+
+<!ELEMENT SeqTable-multi-data_real_E (%REAL;)>
+
+<!-- a set of strings, one per row -->
+<!ELEMENT SeqTable-multi-data_string (SeqTable-multi-data_string_E*)>
+
+
+<!ELEMENT SeqTable-multi-data_string_E (#PCDATA)>
+
+<!-- a set of byte arrays, one per row -->
+<!ELEMENT SeqTable-multi-data_bytes (SeqTable-multi-data_bytes_E*)>
+
+
+<!ELEMENT SeqTable-multi-data_bytes_E (%OCTETS;)>
+
+<!-- a set of string with small set of possible values -->
+<!ELEMENT SeqTable-multi-data_common-string (CommonString-table)>
+
+<!-- a set of byte arrays with small set of possible values -->
+<!ELEMENT SeqTable-multi-data_common-bytes (CommonBytes-table)>
+
+<!--
+ a set of bits, one per row
+ this uses bm::bvector<> as its storage mechanism
+-->
+<!ELEMENT SeqTable-multi-data_bit (%OCTETS;)>
+
+<!-- a set of locations, one per row -->
+<!ELEMENT SeqTable-multi-data_loc (Seq-loc*)>
+
+<!ELEMENT SeqTable-multi-data_id (Seq-id*)>
+
+<!ELEMENT SeqTable-multi-data_interval (Seq-interval*)>
+
+
+<!ELEMENT SeqTable-single-data (
+        SeqTable-single-data_int | 
+        SeqTable-single-data_real | 
+        SeqTable-single-data_string | 
+        SeqTable-single-data_bytes | 
+        SeqTable-single-data_bit | 
+        SeqTable-single-data_loc | 
+        SeqTable-single-data_id | 
+        SeqTable-single-data_interval)>
+
+<!-- integer -->
+<!ELEMENT SeqTable-single-data_int (%INTEGER;)>
+
+<!-- real -->
+<!ELEMENT SeqTable-single-data_real (%REAL;)>
+
+<!-- string -->
+<!ELEMENT SeqTable-single-data_string (#PCDATA)>
+
+<!-- byte array -->
+<!ELEMENT SeqTable-single-data_bytes (%OCTETS;)>
+
+<!-- bit -->
+<!ELEMENT SeqTable-single-data_bit EMPTY>
+<!ATTLIST SeqTable-single-data_bit value ( true | false ) #REQUIRED >
+
+
+<!-- location -->
+<!ELEMENT SeqTable-single-data_loc (Seq-loc)>
+
+<!ELEMENT SeqTable-single-data_id (Seq-id)>
+
+<!ELEMENT SeqTable-single-data_interval (Seq-interval)>
+
+
+<!ELEMENT SeqTable-sparse-index (
+        SeqTable-sparse-index_indexes | 
+        SeqTable-sparse-index_bit-set)>
+
+<!-- indexes of rows with values -->
+<!ELEMENT SeqTable-sparse-index_indexes (SeqTable-sparse-index_indexes_E*)>
+
+
+<!ELEMENT SeqTable-sparse-index_indexes_E (%INTEGER;)>
+
+<!-- bitset of rows with values -->
+<!ELEMENT SeqTable-sparse-index_bit-set (%OCTETS;)>
+
+
+<!ELEMENT SeqTable-column (
+        SeqTable-column_header, 
+        SeqTable-column_data?, 
+        SeqTable-column_sparse?, 
+        SeqTable-column_default?, 
+        SeqTable-column_sparse-other?)>
+
+<!--
+ column description or reference to previously defined info
+ information about data
+-->
+<!ELEMENT SeqTable-column_header (SeqTable-column-info)>
+
+<!-- row data -->
+<!ELEMENT SeqTable-column_data (SeqTable-multi-data)>
+
+<!-- in case not all rows contain data this field will contain sparse info -->
+<!ELEMENT SeqTable-column_sparse (SeqTable-sparse-index)>
+
+<!-- default value for sparse table, or if row data is too short -->
+<!ELEMENT SeqTable-column_default (SeqTable-single-data)>
+
+<!-- single value for indexes not listed in sparse table -->
+<!ELEMENT SeqTable-column_sparse-other (SeqTable-single-data)>
+
+
+<!ELEMENT Seq-table (
+        Seq-table_feat-type, 
+        Seq-table_feat-subtype?, 
+        Seq-table_num-rows, 
+        Seq-table_columns)>
+
+<!-- type of features in this table, equal to Seq-feat.data variant index -->
+<!ELEMENT Seq-table_feat-type (%INTEGER;)>
+
+<!-- subtype of features in this table, defined in header SeqFeatData.hpp -->
+<!ELEMENT Seq-table_feat-subtype (%INTEGER;)>
+
+<!-- number of rows -->
+<!ELEMENT Seq-table_num-rows (%INTEGER;)>
+
+<!-- data in columns -->
+<!ELEMENT Seq-table_columns (SeqTable-column*)>
+
diff --git a/dtd/NCBI_Seq_split.dtd b/dtd/NCBI_Seq_split.dtd
new file mode 100644
index 0000000..d705b7c
--- /dev/null
+++ b/dtd/NCBI_Seq_split.dtd
@@ -0,0 +1,92 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqsplit.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Seq_split.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_Seq_split_module PUBLIC "-//NCBI//NCBI Seq split Module//EN" "NCBI_Seq_split.mod.dtd">
+%NCBI_Seq_split_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Seq_split.mod.dtd b/dtd/NCBI_Seq_split.mod.dtd
new file mode 100644
index 0000000..4ab94ad
--- /dev/null
+++ b/dtd/NCBI_Seq_split.mod.dtd
@@ -0,0 +1,559 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqsplit.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Seq-split"
+================================================= -->
+
+<!--
+$Revision: 181438 $
+********************************************************************
+
+  Network Id server network access
+  Vasilchenko 2003
+
+
+*********************************************************************
+
+  seqsplit.asn
+
+     representation of split sequences
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          ID2S-Chunk-Id,
+          ID2S-Seq-annot-Info -->
+
+<!-- Elements referenced from other modules:
+          Seq-id FROM NCBI-Seqloc,
+          Seq-entry FROM NCBI-Seqset,
+          Bioseq,
+          Seq-annot,
+          Seq-descr,
+          Seq-literal FROM NCBI-Sequence,
+          Seq-align FROM NCBI-Seqalign,
+          Feat-id FROM NCBI-Seqfeat -->
+<!-- ============================================ -->
+
+<!--
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Blob split info types
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Chunks split description
+-->
+<!ELEMENT ID2S-Split-Info (
+        ID2S-Split-Info_bioseqs-info?, 
+        ID2S-Split-Info_chunks, 
+        ID2S-Split-Info_skeleton?)>
+
+<!ELEMENT ID2S-Split-Info_bioseqs-info (ID2S-Bioseqs-Info*)>
+
+<!ELEMENT ID2S-Split-Info_chunks (ID2S-Chunk-Info*)>
+
+<!ELEMENT ID2S-Split-Info_skeleton (Seq-entry)>
+
+
+<!ELEMENT ID2S-Bioseqs-Info (
+        ID2S-Bioseqs-Info_info, 
+        ID2S-Bioseqs-Info_bioseqs)>
+
+<!ELEMENT ID2S-Bioseqs-Info_info (ID2S-Bioseq-Info)>
+
+<!ELEMENT ID2S-Bioseqs-Info_bioseqs (ID2S-Bioseq-Ids)>
+
+
+<!ELEMENT ID2S-Bioseq-Info (
+        ID2S-Bioseq-Info_gap-count?, 
+        ID2S-Bioseq-Info_seq-map-has-ref?)>
+
+<!ELEMENT ID2S-Bioseq-Info_gap-count (%INTEGER;)>
+
+<!ELEMENT ID2S-Bioseq-Info_seq-map-has-ref EMPTY>
+<!ATTLIST ID2S-Bioseq-Info_seq-map-has-ref value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT ID2S-Chunk-Info (
+        ID2S-Chunk-Info_id, 
+        ID2S-Chunk-Info_content)>
+<!--
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ utility types
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT ID2S-Chunk-Info_id (ID2S-Chunk-Id)>
+
+<!ELEMENT ID2S-Chunk-Info_content (ID2S-Chunk-Content*)>
+
+<!--
+ Description of information in this chunk
+ Place means id of Bioseq or Bioseq-set
+-->
+<!ELEMENT ID2S-Chunk-Content (
+        ID2S-Chunk-Content_seq-descr | 
+        ID2S-Chunk-Content_seq-annot | 
+        ID2S-Chunk-Content_seq-assembly | 
+        ID2S-Chunk-Content_seq-map | 
+        ID2S-Chunk-Content_seq-data | 
+        ID2S-Chunk-Content_seq-annot-place | 
+        ID2S-Chunk-Content_bioseq-place | 
+        ID2S-Chunk-Content_feat-ids)>
+
+<!-- place of Seq-descrs -->
+<!ELEMENT ID2S-Chunk-Content_seq-descr (ID2S-Seq-descr-Info)>
+
+<!-- locations and types of annotations -->
+<!ELEMENT ID2S-Chunk-Content_seq-annot (ID2S-Seq-annot-Info)>
+
+<!-- place of assembly history -->
+<!ELEMENT ID2S-Chunk-Content_seq-assembly (ID2S-Seq-assembly-Info)>
+
+<!-- place of sequence map -->
+<!ELEMENT ID2S-Chunk-Content_seq-map (ID2S-Seq-map-Info)>
+
+<!-- place of sequence data -->
+<!ELEMENT ID2S-Chunk-Content_seq-data (ID2S-Seq-data-Info)>
+
+<!-- place of Seq-annots -->
+<!ELEMENT ID2S-Chunk-Content_seq-annot-place (ID2S-Seq-annot-place-Info)>
+
+<!-- place of Bioseqs -->
+<!ELEMENT ID2S-Chunk-Content_bioseq-place (ID2S-Bioseq-place-Info*)>
+
+<!-- ids of features -->
+<!ELEMENT ID2S-Chunk-Content_feat-ids (ID2S-Seq-feat-Ids-Info*)>
+
+
+<!ELEMENT ID2S-Seq-descr-Info (
+        ID2S-Seq-descr-Info_type-mask, 
+        ID2S-Seq-descr-Info_bioseqs?, 
+        ID2S-Seq-descr-Info_bioseq-sets?)>
+
+<!-- mask of Seq-descr types, -->
+<!ELEMENT ID2S-Seq-descr-Info_type-mask (%INTEGER;)>
+
+<!ELEMENT ID2S-Seq-descr-Info_bioseqs (ID2S-Bioseq-Ids)>
+
+<!ELEMENT ID2S-Seq-descr-Info_bioseq-sets (ID2S-Bioseq-set-Ids)>
+
+
+<!ELEMENT ID2S-Seq-annot-Info (
+        ID2S-Seq-annot-Info_name?, 
+        ID2S-Seq-annot-Info_align?, 
+        ID2S-Seq-annot-Info_graph?, 
+        ID2S-Seq-annot-Info_feat?, 
+        ID2S-Seq-annot-Info_seq-loc?)>
+
+<!--
+ name is set if this is named annot
+ name may be empty which differ from unnamed annot
+-->
+<!ELEMENT ID2S-Seq-annot-Info_name (#PCDATA)>
+
+<!ELEMENT ID2S-Seq-annot-Info_align EMPTY>
+
+<!ELEMENT ID2S-Seq-annot-Info_graph EMPTY>
+
+<!ELEMENT ID2S-Seq-annot-Info_feat (ID2S-Feat-type-Info*)>
+<!--
+ ID2S-Seq-loc is used to represent unordered and unstranded
+ set of intervals on set of sequences.
+ It's optimized for compact encoding of several common cases:
+    Seq-ids of type gi,
+    intervals covering whole sequences,
+    whole sequences with sequential gis,
+    set of intervals on the same sequence (Seq-id sharing).
+-->
+<!ELEMENT ID2S-Seq-annot-Info_seq-loc (ID2S-Seq-loc)>
+
+
+<!ELEMENT ID2S-Seq-annot-place-Info (
+        ID2S-Seq-annot-place-Info_name?, 
+        ID2S-Seq-annot-place-Info_bioseqs?, 
+        ID2S-Seq-annot-place-Info_bioseq-sets?)>
+
+<!ELEMENT ID2S-Seq-annot-place-Info_name (#PCDATA)>
+
+<!ELEMENT ID2S-Seq-annot-place-Info_bioseqs (ID2S-Bioseq-Ids)>
+
+<!ELEMENT ID2S-Seq-annot-place-Info_bioseq-sets (ID2S-Bioseq-set-Ids)>
+
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info (
+        ID2S-Seq-feat-Ids-Info_feat-types?, 
+        ID2S-Seq-feat-Ids-Info_xref-types?, 
+        ID2S-Seq-feat-Ids-Info_local-ids?, 
+        ID2S-Seq-feat-Ids-Info_local-str-ids?)>
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info_feat-types (ID2S-Feat-type-Info*)>
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info_xref-types (ID2S-Feat-type-Info*)>
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info_local-ids (ID2S-Seq-feat-Ids-Info_local-ids_E*)>
+
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info_local-ids_E (%INTEGER;)>
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info_local-str-ids (ID2S-Seq-feat-Ids-Info_local-str-ids_E*)>
+
+
+<!ELEMENT ID2S-Seq-feat-Ids-Info_local-str-ids_E (#PCDATA)>
+
+
+<!ELEMENT ID2S-Feat-type-Info (
+        ID2S-Feat-type-Info_type, 
+        ID2S-Feat-type-Info_subtypes?)>
+
+<!ELEMENT ID2S-Feat-type-Info_type (%INTEGER;)>
+
+<!ELEMENT ID2S-Feat-type-Info_subtypes (ID2S-Feat-type-Info_subtypes_E*)>
+
+
+<!ELEMENT ID2S-Feat-type-Info_subtypes_E (%INTEGER;)>
+
+
+<!ELEMENT ID2S-Seq-assembly-Info (
+        ID2S-Seq-assembly-Info_bioseqs)>
+
+<!ELEMENT ID2S-Seq-assembly-Info_bioseqs (ID2S-Bioseq-Ids)>
+
+
+<!ELEMENT ID2S-Seq-map-Info (ID2S-Seq-loc)>
+
+
+<!ELEMENT ID2S-Seq-data-Info (ID2S-Seq-loc)>
+
+
+<!ELEMENT ID2S-Bioseq-place-Info (
+        ID2S-Bioseq-place-Info_bioseq-set, 
+        ID2S-Bioseq-place-Info_seq-ids)>
+
+<!ELEMENT ID2S-Bioseq-place-Info_bioseq-set (%INTEGER;)>
+
+<!ELEMENT ID2S-Bioseq-place-Info_seq-ids (ID2S-Bioseq-Ids)>
+
+
+<!ELEMENT ID2S-Chunk (
+        ID2S-Chunk_data)>
+
+<!ELEMENT ID2S-Chunk_data (ID2S-Chunk-Data*)>
+
+
+<!ELEMENT ID2S-Chunk-Data (
+        ID2S-Chunk-Data_id, 
+        ID2S-Chunk-Data_descr?, 
+        ID2S-Chunk-Data_annots?, 
+        ID2S-Chunk-Data_assembly?, 
+        ID2S-Chunk-Data_seq-map?, 
+        ID2S-Chunk-Data_seq-data?, 
+        ID2S-Chunk-Data_bioseqs?)>
+<!-- place of data to insert -->
+<!ELEMENT ID2S-Chunk-Data_id (
+        ID2S-Chunk-Data_id_bioseq-set | 
+        ID2S-Chunk-Data_id_gi | 
+        ID2S-Chunk-Data_id_seq-id)>
+
+<!-- Bioseq-set id -->
+<!ELEMENT ID2S-Chunk-Data_id_bioseq-set (%INTEGER;)>
+
+<!-- Bioseq id -->
+<!ELEMENT ID2S-Chunk-Data_id_gi (%INTEGER;)>
+
+<!-- Bioseq id -->
+<!ELEMENT ID2S-Chunk-Data_id_seq-id (Seq-id)>
+
+<!-- Seq-descr, for Bioseq and Bioseq-set -->
+<!ELEMENT ID2S-Chunk-Data_descr (Seq-descr)>
+
+<!-- Seq-annot, for Bioseq and Bioseq-set -->
+<!ELEMENT ID2S-Chunk-Data_annots (Seq-annot*)>
+
+<!-- assembly history Seq-align, for Bioseq -->
+<!ELEMENT ID2S-Chunk-Data_assembly (Seq-align*)>
+
+<!-- sequence map, for Bioseq -->
+<!ELEMENT ID2S-Chunk-Data_seq-map (ID2S-Sequence-Piece*)>
+
+<!-- sequence data, for Bioseq -->
+<!ELEMENT ID2S-Chunk-Data_seq-data (ID2S-Sequence-Piece*)>
+
+<!-- Bioseq, for Bioseq-set -->
+<!ELEMENT ID2S-Chunk-Data_bioseqs (Bioseq*)>
+
+
+<!ELEMENT ID2S-Sequence-Piece (
+        ID2S-Sequence-Piece_start, 
+        ID2S-Sequence-Piece_data)>
+
+<!-- start position on sequence -->
+<!ELEMENT ID2S-Sequence-Piece_start (%INTEGER;)>
+
+<!ELEMENT ID2S-Sequence-Piece_data (Seq-literal*)>
+
+<!--
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ utility types
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT ID2S-Chunk-Id (%INTEGER;)>
+
+
+<!ELEMENT ID2S-Bioseq-set-Ids (ID2S-Bioseq-set-Ids_E*)>
+
+
+
+<!ELEMENT ID2S-Bioseq-set-Ids_E (%INTEGER;)>
+
+
+<!ELEMENT ID2S-Bioseq-Ids (ID2S-Bioseq-Ids_E*)>
+
+
+
+<!ELEMENT ID2S-Bioseq-Ids_E (
+        ID2S-Bioseq-Ids_E_gi | 
+        ID2S-Bioseq-Ids_E_seq-id | 
+        ID2S-Bioseq-Ids_E_gi-range)>
+
+<!ELEMENT ID2S-Bioseq-Ids_E_gi (%INTEGER;)>
+
+<!ELEMENT ID2S-Bioseq-Ids_E_seq-id (Seq-id)>
+
+<!ELEMENT ID2S-Bioseq-Ids_E_gi-range (ID2S-Gi-Range)>
+
+
+<!ELEMENT ID2S-Gi-Range (
+        ID2S-Gi-Range_start, 
+        ID2S-Gi-Range_count?)>
+
+<!-- start gi in this gi range -->
+<!ELEMENT ID2S-Gi-Range_start (%INTEGER;)>
+
+<!-- number of sequential gis -->
+<!ELEMENT ID2S-Gi-Range_count (%INTEGER;)>
+
+<!--
+ ID2S-Seq-loc is used to represent unordered and unstranded
+ set of intervals on set of sequences.
+ It's optimized for compact encoding of several common cases:
+    Seq-ids of type gi,
+    intervals covering whole sequences,
+    whole sequences with sequential gis,
+    set of intervals on the same sequence (Seq-id sharing).
+-->
+<!ELEMENT ID2S-Seq-loc (
+        ID2S-Seq-loc_whole-gi | 
+        ID2S-Seq-loc_whole-seq-id | 
+        ID2S-Seq-loc_whole-gi-range | 
+        ID2S-Seq-loc_gi-interval | 
+        ID2S-Seq-loc_seq-id-interval | 
+        ID2S-Seq-loc_gi-ints | 
+        ID2S-Seq-loc_seq-id-ints | 
+        ID2S-Seq-loc_loc-set)>
+
+<!-- whole sequence by gi -->
+<!ELEMENT ID2S-Seq-loc_whole-gi (%INTEGER;)>
+
+<!-- whole sequence by Seq-id -->
+<!ELEMENT ID2S-Seq-loc_whole-seq-id (Seq-id)>
+
+<!-- set of whole sequences by gis -->
+<!ELEMENT ID2S-Seq-loc_whole-gi-range (ID2S-Gi-Range)>
+
+<!-- interval on sequence by gi -->
+<!ELEMENT ID2S-Seq-loc_gi-interval (ID2S-Gi-Interval)>
+
+<!-- interval on sequence by Seq-id -->
+<!ELEMENT ID2S-Seq-loc_seq-id-interval (ID2S-Seq-id-Interval)>
+
+<!-- set of intervals on the same gi -->
+<!ELEMENT ID2S-Seq-loc_gi-ints (ID2S-Gi-Ints)>
+
+<!-- set of intervals on the same id -->
+<!ELEMENT ID2S-Seq-loc_seq-id-ints (ID2S-Seq-id-Ints)>
+
+<!-- combination of locations -->
+<!ELEMENT ID2S-Seq-loc_loc-set (ID2S-Seq-loc*)>
+
+
+<!ELEMENT ID2S-Gi-Interval (
+        ID2S-Gi-Interval_gi, 
+        ID2S-Gi-Interval_start, 
+        ID2S-Gi-Interval_length?)>
+
+<!ELEMENT ID2S-Gi-Interval_gi (%INTEGER;)>
+
+<!ELEMENT ID2S-Gi-Interval_start (%INTEGER;)>
+
+<!ELEMENT ID2S-Gi-Interval_length (%INTEGER;)>
+
+
+<!ELEMENT ID2S-Seq-id-Interval (
+        ID2S-Seq-id-Interval_seq-id, 
+        ID2S-Seq-id-Interval_start, 
+        ID2S-Seq-id-Interval_length?)>
+
+<!ELEMENT ID2S-Seq-id-Interval_seq-id (Seq-id)>
+
+<!ELEMENT ID2S-Seq-id-Interval_start (%INTEGER;)>
+
+<!ELEMENT ID2S-Seq-id-Interval_length (%INTEGER;)>
+
+
+<!ELEMENT ID2S-Interval (
+        ID2S-Interval_start, 
+        ID2S-Interval_length?)>
+
+<!ELEMENT ID2S-Interval_start (%INTEGER;)>
+
+<!ELEMENT ID2S-Interval_length (%INTEGER;)>
+
+
+<!ELEMENT ID2S-Gi-Ints (
+        ID2S-Gi-Ints_gi, 
+        ID2S-Gi-Ints_ints)>
+
+<!ELEMENT ID2S-Gi-Ints_gi (%INTEGER;)>
+
+<!ELEMENT ID2S-Gi-Ints_ints (ID2S-Interval*)>
+
+
+<!ELEMENT ID2S-Seq-id-Ints (
+        ID2S-Seq-id-Ints_seq-id, 
+        ID2S-Seq-id-Ints_ints)>
+
+<!ELEMENT ID2S-Seq-id-Ints_seq-id (Seq-id)>
+
+<!ELEMENT ID2S-Seq-id-Ints_ints (ID2S-Interval*)>
+
diff --git a/dtd/NCBI_Seqalign.dtd b/dtd/NCBI_Seqalign.dtd
new file mode 100644
index 0000000..08e37eb
--- /dev/null
+++ b/dtd/NCBI_Seqalign.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqalign.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Seqalign.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Seqalign.mod.dtd b/dtd/NCBI_Seqalign.mod.dtd
new file mode 100644
index 0000000..721a351
--- /dev/null
+++ b/dtd/NCBI_Seqalign.mod.dtd
@@ -0,0 +1,570 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqalign.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 08/01/2012 23:04:42
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Seqalign"
+================================================= -->
+
+<!--
+$Revision: 370567 $
+**********************************************************************
+
+  NCBI Sequence Alignment elements
+  by James Ostell, 1990
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Seq-align,
+          Score,
+          Score-set,
+          Seq-align-set -->
+
+<!-- Elements referenced from other modules:
+          Seq-id,
+          Seq-loc,
+          Na-strand FROM NCBI-Seqloc,
+          User-object,
+          Object-id FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+*** Sequence Alignment ********************************
+*
+-->
+<!ELEMENT Seq-align-set (Seq-align*)>
+
+
+<!ELEMENT Seq-align (
+        Seq-align_type, 
+        Seq-align_dim?, 
+        Seq-align_score?, 
+        Seq-align_segs, 
+        Seq-align_bounds?, 
+        Seq-align_id?, 
+        Seq-align_ext?)>
+
+<!ELEMENT Seq-align_type %ENUM;>
+
+<!--
+    diags	-  unbroken, but not ordered, diagonals
+    partial	-  mapping pieces together
+    disc	-  discontinuous alignment
+-->
+<!ATTLIST Seq-align_type value (
+        not-set |
+        global |
+        diags |
+        partial |
+        disc |
+        other
+        ) #REQUIRED >
+
+
+<!-- dimensionality -->
+<!ELEMENT Seq-align_dim (%INTEGER;)>
+
+<!-- for whole alignment -->
+<!ELEMENT Seq-align_score (Score*)>
+<!-- alignment data -->
+<!ELEMENT Seq-align_segs (
+        Seq-align_segs_dendiag | 
+        Seq-align_segs_denseg | 
+        Seq-align_segs_std | 
+        Seq-align_segs_packed | 
+        Seq-align_segs_disc | 
+        Seq-align_segs_spliced | 
+        Seq-align_segs_sparse)>
+
+<!ELEMENT Seq-align_segs_dendiag (Dense-diag*)>
+<!--
+ Dense-seg: the densist packing for sequence alignments only.
+            a start of -1 indicates a gap for that sequence of
+            length lens.
+
+ id=100  AAGGCCTTTTAGAGATGATGATGATGATGA
+ id=200  AAGGCCTTTTAG.......GATGATGATGA
+ id=300  ....CCTTTTAGAGATGATGAT....ATGA
+
+ dim = 3, numseg = 6, ids = { 100, 200, 300 }
+ starts = { 0,0,-1, 4,4,0, 12,-1,8, 19,12,15, 22,15,-1, 26,19,18 }
+ lens = { 4, 8, 7, 3, 4, 4 }
+
+ for (multiway) global or partial alignments
+-->
+<!ELEMENT Seq-align_segs_denseg (Dense-seg)>
+
+<!ELEMENT Seq-align_segs_std (Std-seg*)>
+<!-- for (multiway) global or partial alignments -->
+<!ELEMENT Seq-align_segs_packed (Packed-seg)>
+<!--
+*** Sequence Alignment ********************************
+*
+-->
+<!ELEMENT Seq-align_segs_disc (Seq-align-set)>
+
+<!ELEMENT Seq-align_segs_spliced (Spliced-seg)>
+<!--
+ ==========================================================================
+
+ Sparse-seg follows the semantics of dense-seg and is more optimal for
+ representing sparse multiple alignments
+
+ ==========================================================================
+-->
+<!ELEMENT Seq-align_segs_sparse (Sparse-seg)>
+
+<!--
+ regions of sequence over which align
+  was computed
+-->
+<!ELEMENT Seq-align_bounds (Seq-loc*)>
+
+<!-- alignment id -->
+<!ELEMENT Seq-align_id (Object-id*)>
+
+<!--extra info -->
+<!ELEMENT Seq-align_ext (User-object*)>
+
+<!-- for (multiway) diagonals -->
+<!ELEMENT Dense-diag (
+        Dense-diag_dim?, 
+        Dense-diag_ids, 
+        Dense-diag_starts, 
+        Dense-diag_len, 
+        Dense-diag_strands?, 
+        Dense-diag_scores?)>
+
+<!-- dimensionality -->
+<!ELEMENT Dense-diag_dim (%INTEGER;)>
+
+<!-- sequences in order -->
+<!ELEMENT Dense-diag_ids (Seq-id*)>
+
+<!-- start OFFSETS in ids order -->
+<!ELEMENT Dense-diag_starts (Dense-diag_starts_E*)>
+
+
+<!ELEMENT Dense-diag_starts_E (%INTEGER;)>
+
+<!-- len of aligned segments -->
+<!ELEMENT Dense-diag_len (%INTEGER;)>
+
+<!ELEMENT Dense-diag_strands (Na-strand*)>
+
+<!ELEMENT Dense-diag_scores (Score*)>
+
+<!--
+ Dense-seg: the densist packing for sequence alignments only.
+            a start of -1 indicates a gap for that sequence of
+            length lens.
+
+ id=100  AAGGCCTTTTAGAGATGATGATGATGATGA
+ id=200  AAGGCCTTTTAG.......GATGATGATGA
+ id=300  ....CCTTTTAGAGATGATGAT....ATGA
+
+ dim = 3, numseg = 6, ids = { 100, 200, 300 }
+ starts = { 0,0,-1, 4,4,0, 12,-1,8, 19,12,15, 22,15,-1, 26,19,18 }
+ lens = { 4, 8, 7, 3, 4, 4 }
+
+ for (multiway) global or partial alignments
+-->
+<!ELEMENT Dense-seg (
+        Dense-seg_dim?, 
+        Dense-seg_numseg, 
+        Dense-seg_ids, 
+        Dense-seg_starts, 
+        Dense-seg_lens, 
+        Dense-seg_strands?, 
+        Dense-seg_scores?)>
+
+<!-- dimensionality -->
+<!ELEMENT Dense-seg_dim (%INTEGER;)>
+
+<!-- number of segments here -->
+<!ELEMENT Dense-seg_numseg (%INTEGER;)>
+
+<!-- sequences in order -->
+<!ELEMENT Dense-seg_ids (Seq-id*)>
+
+<!-- start OFFSETS in ids order within segs -->
+<!ELEMENT Dense-seg_starts (Dense-seg_starts_E*)>
+
+
+<!ELEMENT Dense-seg_starts_E (%INTEGER;)>
+
+<!-- lengths in ids order within segs -->
+<!ELEMENT Dense-seg_lens (Dense-seg_lens_E*)>
+
+
+<!ELEMENT Dense-seg_lens_E (%INTEGER;)>
+
+<!ELEMENT Dense-seg_strands (Na-strand*)>
+
+<!-- score for each seg -->
+<!ELEMENT Dense-seg_scores (Score*)>
+
+<!-- for (multiway) global or partial alignments -->
+<!ELEMENT Packed-seg (
+        Packed-seg_dim?, 
+        Packed-seg_numseg, 
+        Packed-seg_ids, 
+        Packed-seg_starts, 
+        Packed-seg_present, 
+        Packed-seg_lens, 
+        Packed-seg_strands?, 
+        Packed-seg_scores?)>
+
+<!-- dimensionality -->
+<!ELEMENT Packed-seg_dim (%INTEGER;)>
+
+<!-- number of segments here -->
+<!ELEMENT Packed-seg_numseg (%INTEGER;)>
+
+<!-- sequences in order -->
+<!ELEMENT Packed-seg_ids (Seq-id*)>
+
+<!-- start OFFSETS in ids order for whole alignment -->
+<!ELEMENT Packed-seg_starts (Packed-seg_starts_E*)>
+
+
+<!ELEMENT Packed-seg_starts_E (%INTEGER;)>
+
+<!--
+ Boolean if each sequence present or absent in
+   each segment
+-->
+<!ELEMENT Packed-seg_present (%OCTETS;)>
+
+<!-- length of each segment -->
+<!ELEMENT Packed-seg_lens (Packed-seg_lens_E*)>
+
+
+<!ELEMENT Packed-seg_lens_E (%INTEGER;)>
+
+<!ELEMENT Packed-seg_strands (Na-strand*)>
+
+<!-- score for each segment -->
+<!ELEMENT Packed-seg_scores (Score*)>
+
+
+<!ELEMENT Std-seg (
+        Std-seg_dim?, 
+        Std-seg_ids?, 
+        Std-seg_loc, 
+        Std-seg_scores?)>
+
+<!-- dimensionality -->
+<!ELEMENT Std-seg_dim (%INTEGER;)>
+
+<!ELEMENT Std-seg_ids (Seq-id*)>
+
+<!ELEMENT Std-seg_loc (Seq-loc*)>
+
+<!ELEMENT Std-seg_scores (Score*)>
+
+
+<!ELEMENT Spliced-seg (
+        Spliced-seg_product-id?, 
+        Spliced-seg_genomic-id?, 
+        Spliced-seg_product-strand?, 
+        Spliced-seg_genomic-strand?, 
+        Spliced-seg_product-type, 
+        Spliced-seg_exons, 
+        Spliced-seg_poly-a?, 
+        Spliced-seg_product-length?, 
+        Spliced-seg_modifiers?)>
+
+<!-- product is either protein or transcript (cDNA) -->
+<!ELEMENT Spliced-seg_product-id (Seq-id)>
+
+<!ELEMENT Spliced-seg_genomic-id (Seq-id)>
+
+<!-- should be 'plus' or 'minus' -->
+<!ELEMENT Spliced-seg_product-strand (Na-strand)>
+
+<!ELEMENT Spliced-seg_genomic-strand (Na-strand)>
+
+<!ELEMENT Spliced-seg_product-type %ENUM;>
+<!ATTLIST Spliced-seg_product-type value (
+        transcript |
+        protein
+        ) #REQUIRED >
+
+
+<!--
+ set of segments involved
+ each segment corresponds to one exon
+ exons are always in biological order
+-->
+<!ELEMENT Spliced-seg_exons (Spliced-exon*)>
+
+<!--
+ start of poly(A) tail on the transcript
+ For sense transcripts:
+   aligned product positions < poly-a <= product-length
+   poly-a == product-length indicates inferred poly(A) tail at transcript's end
+ For antisense transcripts:
+   -1 <= poly-a < aligned product positions
+   poly-a == -1 indicates inferred poly(A) tail at transcript's start
+-->
+<!ELEMENT Spliced-seg_poly-a (%INTEGER;)>
+
+<!--
+ length of the product, in bases/residues
+ from this (or from poly-a if present), a 3' unaligned length can be extracted
+-->
+<!ELEMENT Spliced-seg_product-length (%INTEGER;)>
+
+<!--
+ alignment descriptors / modifiers
+ this provides us a set for extension
+-->
+<!ELEMENT Spliced-seg_modifiers (Spliced-seg-modifier*)>
+
+
+<!ELEMENT Spliced-seg-modifier (
+        Spliced-seg-modifier_start-codon-found | 
+        Spliced-seg-modifier_stop-codon-found)>
+
+<!--
+ protein aligns from the start and the first codon 
+ on both product and genomic is start codon
+-->
+<!ELEMENT Spliced-seg-modifier_start-codon-found EMPTY>
+<!ATTLIST Spliced-seg-modifier_start-codon-found value ( true | false ) #REQUIRED >
+
+
+<!--
+ protein aligns to it's end and there is stop codon 
+ on the genomic right after the alignment
+-->
+<!ELEMENT Spliced-seg-modifier_stop-codon-found EMPTY>
+<!ATTLIST Spliced-seg-modifier_stop-codon-found value ( true | false ) #REQUIRED >
+
+
+<!--
+ complete or partial exon
+ two consecutive Spliced-exons may belong to one exon
+-->
+<!ELEMENT Spliced-exon (
+        Spliced-exon_product-start, 
+        Spliced-exon_product-end, 
+        Spliced-exon_genomic-start, 
+        Spliced-exon_genomic-end, 
+        Spliced-exon_product-id?, 
+        Spliced-exon_genomic-id?, 
+        Spliced-exon_product-strand?, 
+        Spliced-exon_genomic-strand?, 
+        Spliced-exon_parts?, 
+        Spliced-exon_scores?, 
+        Spliced-exon_acceptor-before-exon?, 
+        Spliced-exon_donor-after-exon?, 
+        Spliced-exon_partial?, 
+        Spliced-exon_ext?)>
+
+<!-- product-end >= product-start -->
+<!ELEMENT Spliced-exon_product-start (Product-pos)>
+
+<!ELEMENT Spliced-exon_product-end (Product-pos)>
+
+<!-- genomic-end >= genomic-start -->
+<!ELEMENT Spliced-exon_genomic-start (%INTEGER;)>
+
+<!ELEMENT Spliced-exon_genomic-end (%INTEGER;)>
+
+<!-- product is either protein or transcript (cDNA) -->
+<!ELEMENT Spliced-exon_product-id (Seq-id)>
+
+<!ELEMENT Spliced-exon_genomic-id (Seq-id)>
+
+<!-- should be 'plus' or 'minus' -->
+<!ELEMENT Spliced-exon_product-strand (Na-strand)>
+
+<!-- genomic-strand represents the strand of translation -->
+<!ELEMENT Spliced-exon_genomic-strand (Na-strand)>
+
+<!-- basic seqments always are in biologic order -->
+<!ELEMENT Spliced-exon_parts (Spliced-exon-chunk*)>
+
+<!-- scores for this exon -->
+<!ELEMENT Spliced-exon_scores (Score-set)>
+
+<!-- splice sites -->
+<!ELEMENT Spliced-exon_acceptor-before-exon (Splice-site)>
+<!-- site involved in splice -->
+<!ELEMENT Spliced-exon_donor-after-exon (Splice-site)>
+
+<!-- flag: is this exon complete or partial? -->
+<!ELEMENT Spliced-exon_partial EMPTY>
+<!ATTLIST Spliced-exon_partial value ( true | false ) #REQUIRED >
+
+
+<!--extra info -->
+<!ELEMENT Spliced-exon_ext (User-object*)>
+
+
+<!ELEMENT Product-pos (
+        Product-pos_nucpos | 
+        Product-pos_protpos)>
+
+<!ELEMENT Product-pos_nucpos (%INTEGER;)>
+<!-- position on protein (1/3 of amino-acid resolution) -->
+<!ELEMENT Product-pos_protpos (Prot-pos)>
+
+<!-- position on protein (1/3 of amino-acid resolution) -->
+<!ELEMENT Prot-pos (
+        Prot-pos_amin, 
+        Prot-pos_frame?)>
+
+<!-- amino-acid position (0-based) -->
+<!ELEMENT Prot-pos_amin (%INTEGER;)>
+
+<!--
+ position within codon (1-based)
+ 0 = not set (meaning 1)
+-->
+<!ELEMENT Prot-pos_frame (%INTEGER;)>
+
+<!--
+ Spliced-exon-chunk: piece of an exon
+ lengths are given in nucleotide bases (1/3 of aminoacid when product is a
+ protein)
+-->
+<!ELEMENT Spliced-exon-chunk (
+        Spliced-exon-chunk_match | 
+        Spliced-exon-chunk_mismatch | 
+        Spliced-exon-chunk_diag | 
+        Spliced-exon-chunk_product-ins | 
+        Spliced-exon-chunk_genomic-ins)>
+
+<!-- both sequences represented, product and genomic sequences match -->
+<!ELEMENT Spliced-exon-chunk_match (%INTEGER;)>
+
+<!-- both sequences represented, product and genomic sequences do not match -->
+<!ELEMENT Spliced-exon-chunk_mismatch (%INTEGER;)>
+
+<!--
+ both sequences are represented, there is sufficient similarity 
+ between product and genomic sequences. Can be used to replace stretches
+ of matches and mismatches, mostly for protein to genomic where 
+ definition of match or mismatch depends on translation table
+-->
+<!ELEMENT Spliced-exon-chunk_diag (%INTEGER;)>
+
+<!-- insertion in product sequence (i.e. gap in the genomic sequence) -->
+<!ELEMENT Spliced-exon-chunk_product-ins (%INTEGER;)>
+
+<!-- insertion in genomic sequence (i.e. gap in the product sequence) -->
+<!ELEMENT Spliced-exon-chunk_genomic-ins (%INTEGER;)>
+
+<!-- site involved in splice -->
+<!ELEMENT Splice-site (
+        Splice-site_bases)>
+
+<!--
+ typically two bases in the intronic region, always
+ in IUPAC format
+-->
+<!ELEMENT Splice-site_bases (#PCDATA)>
+
+<!--
+ ==========================================================================
+
+ Sparse-seg follows the semantics of dense-seg and is more optimal for
+ representing sparse multiple alignments
+
+ ==========================================================================
+-->
+<!ELEMENT Sparse-seg (
+        Sparse-seg_master-id?, 
+        Sparse-seg_rows, 
+        Sparse-seg_row-scores?, 
+        Sparse-seg_ext?)>
+
+<!ELEMENT Sparse-seg_master-id (Seq-id)>
+
+<!-- pairwise alignments constituting this multiple alignment -->
+<!ELEMENT Sparse-seg_rows (Sparse-align*)>
+
+<!-- per-row scores -->
+<!ELEMENT Sparse-seg_row-scores (Score*)>
+
+<!-- index of extra items -->
+<!ELEMENT Sparse-seg_ext (Sparse-seg-ext*)>
+
+
+<!ELEMENT Sparse-align (
+        Sparse-align_first-id, 
+        Sparse-align_second-id, 
+        Sparse-align_numseg, 
+        Sparse-align_first-starts, 
+        Sparse-align_second-starts, 
+        Sparse-align_lens, 
+        Sparse-align_second-strands?, 
+        Sparse-align_seg-scores?)>
+
+<!ELEMENT Sparse-align_first-id (Seq-id)>
+
+<!ELEMENT Sparse-align_second-id (Seq-id)>
+
+<!--number of segments -->
+<!ELEMENT Sparse-align_numseg (%INTEGER;)>
+
+<!--starts on the first sequence [numseg] -->
+<!ELEMENT Sparse-align_first-starts (Sparse-align_first-starts_E*)>
+
+
+<!ELEMENT Sparse-align_first-starts_E (%INTEGER;)>
+
+<!--starts on the second sequence [numseg] -->
+<!ELEMENT Sparse-align_second-starts (Sparse-align_second-starts_E*)>
+
+
+<!ELEMENT Sparse-align_second-starts_E (%INTEGER;)>
+
+<!--lengths of segments [numseg] -->
+<!ELEMENT Sparse-align_lens (Sparse-align_lens_E*)>
+
+
+<!ELEMENT Sparse-align_lens_E (%INTEGER;)>
+
+<!ELEMENT Sparse-align_second-strands (Na-strand*)>
+
+<!-- per-segment scores -->
+<!ELEMENT Sparse-align_seg-scores (Score*)>
+
+
+<!ELEMENT Sparse-seg-ext (
+        Sparse-seg-ext_index)>
+
+<!--
+seg-ext SET OF {
+    index INTEGER,
+    data User-field
+ }
+-->
+<!ELEMENT Sparse-seg-ext_index (%INTEGER;)>
+
+<!-- use of Score is discouraged for external ASN.1 specifications -->
+<!ELEMENT Score (
+        Score_id?, 
+        Score_value)>
+
+<!ELEMENT Score_id (Object-id)>
+
+<!ELEMENT Score_value (
+        Score_value_real | 
+        Score_value_int)>
+
+<!ELEMENT Score_value_real (%REAL;)>
+
+<!ELEMENT Score_value_int (%INTEGER;)>
+
+<!-- use of Score-set is encouraged for external ASN.1 specifications -->
+<!ELEMENT Score-set (Score*)>
+
diff --git a/dtd/NCBI_Seqfeat.dtd b/dtd/NCBI_Seqfeat.dtd
new file mode 100644
index 0000000..48af83f
--- /dev/null
+++ b/dtd/NCBI_Seqfeat.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Seqfeat.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Seqfeat.mod.dtd b/dtd/NCBI_Seqfeat.mod.dtd
new file mode 100644
index 0000000..fb7dc75
--- /dev/null
+++ b/dtd/NCBI_Seqfeat.mod.dtd
@@ -0,0 +1,772 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 09/28/2012 23:04:43
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Seqfeat"
+================================================= -->
+
+<!--
+$Revision: 376374 $
+**********************************************************************
+
+  NCBI Sequence Feature elements
+  by James Ostell, 1990
+  Version 3.0 - June 1994
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Seq-feat,
+          Feat-id,
+          Genetic-code,
+          ModelEvidenceSupport -->
+
+<!-- Elements referenced from other modules:
+          Gene-ref FROM NCBI-Gene,
+          Prot-ref FROM NCBI-Protein,
+          Org-ref FROM NCBI-Organism,
+          Variation-ref FROM NCBI-Variation,
+          BioSource FROM NCBI-BioSource,
+          RNA-ref FROM NCBI-RNA,
+          Seq-id,
+          Seq-loc,
+          Giimport-id FROM NCBI-Seqloc,
+          Pubdesc,
+          Numbering,
+          Heterogen FROM NCBI-Sequence,
+          Rsite-ref FROM NCBI-Rsite,
+          Txinit FROM NCBI-TxInit,
+          DOI,
+          PubMedId FROM NCBI-Biblio,
+          Pub-set FROM NCBI-Pub,
+          Object-id,
+          Dbtag,
+          User-object FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+*** Feature identifiers ********************************
+*
+-->
+<!ELEMENT Feat-id (
+        Feat-id_gibb | 
+        Feat-id_giim | 
+        Feat-id_local | 
+        Feat-id_general)>
+
+<!-- geninfo backbone -->
+<!ELEMENT Feat-id_gibb (%INTEGER;)>
+
+<!-- geninfo import -->
+<!ELEMENT Feat-id_giim (Giimport-id)>
+
+<!-- for local software use -->
+<!ELEMENT Feat-id_local (Object-id)>
+
+<!-- for use by various databases -->
+<!ELEMENT Feat-id_general (Dbtag)>
+
+<!--
+*** Seq-feat *******************************************
+*  sequence feature generalization
+-->
+<!ELEMENT Seq-feat (
+        Seq-feat_id?, 
+        Seq-feat_data, 
+        Seq-feat_partial?, 
+        Seq-feat_except?, 
+        Seq-feat_comment?, 
+        Seq-feat_product?, 
+        Seq-feat_location, 
+        Seq-feat_qual?, 
+        Seq-feat_title?, 
+        Seq-feat_ext?, 
+        Seq-feat_cit?, 
+        Seq-feat_exp-ev?, 
+        Seq-feat_xref?, 
+        Seq-feat_dbxref?, 
+        Seq-feat_pseudo?, 
+        Seq-feat_except-text?, 
+        Seq-feat_ids?, 
+        Seq-feat_exts?, 
+        Seq-feat_support?)>
+<!--
+*** Feature identifiers ********************************
+*
+-->
+<!ELEMENT Seq-feat_id (Feat-id)>
+
+<!-- the specific data -->
+<!ELEMENT Seq-feat_data (SeqFeatData)>
+
+<!-- incomplete in some way? -->
+<!ELEMENT Seq-feat_partial EMPTY>
+<!ATTLIST Seq-feat_partial value ( true | false ) #REQUIRED >
+
+
+<!-- something funny about this? -->
+<!ELEMENT Seq-feat_except EMPTY>
+<!ATTLIST Seq-feat_except value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Seq-feat_comment (#PCDATA)>
+
+<!-- product of process -->
+<!ELEMENT Seq-feat_product (Seq-loc)>
+
+<!-- feature made from -->
+<!ELEMENT Seq-feat_location (Seq-loc)>
+
+<!-- qualifiers -->
+<!ELEMENT Seq-feat_qual (Gb-qual*)>
+
+<!-- for user defined label -->
+<!ELEMENT Seq-feat_title (#PCDATA)>
+
+<!-- user defined structure extension -->
+<!ELEMENT Seq-feat_ext (User-object)>
+
+<!-- citations for this feature -->
+<!ELEMENT Seq-feat_cit (Pub-set)>
+<!-- evidence for existence of feature -->
+<!ELEMENT Seq-feat_exp-ev %ENUM;>
+
+<!--
+    experimental	-  any reasonable experimental check
+    not-experimental	-  similarity, pattern, etc
+-->
+<!ATTLIST Seq-feat_exp-ev value (
+        experimental |
+        not-experimental
+        ) #REQUIRED >
+
+
+<!-- cite other relevant features -->
+<!ELEMENT Seq-feat_xref (SeqFeatXref*)>
+
+<!-- support for xref to other databases -->
+<!ELEMENT Seq-feat_dbxref (Dbtag*)>
+
+<!-- annotated on pseudogene? -->
+<!ELEMENT Seq-feat_pseudo EMPTY>
+<!ATTLIST Seq-feat_pseudo value ( true | false ) #REQUIRED >
+
+
+<!-- explain if except=TRUE -->
+<!ELEMENT Seq-feat_except-text (#PCDATA)>
+
+<!-- set of Ids; will replace 'id' field -->
+<!ELEMENT Seq-feat_ids (Feat-id*)>
+
+<!-- set of extensions; will replace 'ext' field -->
+<!ELEMENT Seq-feat_exts (User-object*)>
+
+<!-- will replace /experiment, /inference, model-evidence -->
+<!ELEMENT Seq-feat_support (SeqFeatSupport)>
+
+
+<!ELEMENT SeqFeatData (
+        SeqFeatData_gene | 
+        SeqFeatData_org | 
+        SeqFeatData_cdregion | 
+        SeqFeatData_prot | 
+        SeqFeatData_rna | 
+        SeqFeatData_pub | 
+        SeqFeatData_seq | 
+        SeqFeatData_imp | 
+        SeqFeatData_region | 
+        SeqFeatData_comment | 
+        SeqFeatData_bond | 
+        SeqFeatData_site | 
+        SeqFeatData_rsite | 
+        SeqFeatData_user | 
+        SeqFeatData_txinit | 
+        SeqFeatData_num | 
+        SeqFeatData_psec-str | 
+        SeqFeatData_non-std-residue | 
+        SeqFeatData_het | 
+        SeqFeatData_biosrc | 
+        SeqFeatData_clone | 
+        SeqFeatData_variation)>
+
+<!ELEMENT SeqFeatData_gene (Gene-ref)>
+
+<!ELEMENT SeqFeatData_org (Org-ref)>
+<!--
+*** CdRegion ***********************************************
+*
+*  Instructions to translate from a nucleic acid to a peptide
+*    conflict means it's supposed to translate but doesn't
+*
+-->
+<!ELEMENT SeqFeatData_cdregion (Cdregion)>
+
+<!ELEMENT SeqFeatData_prot (Prot-ref)>
+
+<!ELEMENT SeqFeatData_rna (RNA-ref)>
+
+<!-- publication applies to this seq -->
+<!ELEMENT SeqFeatData_pub (Pubdesc)>
+
+<!-- to annotate origin from another seq -->
+<!ELEMENT SeqFeatData_seq (Seq-loc)>
+<!--
+*** Import ***********************************************
+*
+*  Features imported from other databases
+*
+-->
+<!ELEMENT SeqFeatData_imp (Imp-feat)>
+
+<!-- named region (globin locus) -->
+<!ELEMENT SeqFeatData_region (#PCDATA)>
+
+<!-- just a comment -->
+<!ELEMENT SeqFeatData_comment EMPTY>
+
+<!ELEMENT SeqFeatData_bond %ENUM;>
+<!ATTLIST SeqFeatData_bond value (
+        disulfide |
+        thiolester |
+        xlink |
+        thioether |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT SeqFeatData_site %ENUM;>
+<!ATTLIST SeqFeatData_site value (
+        active |
+        binding |
+        cleavage |
+        inhibit |
+        modified |
+        glycosylation |
+        myristoylation |
+        mutagenized |
+        metal-binding |
+        phosphorylation |
+        acetylation |
+        amidation |
+        methylation |
+        hydroxylation |
+        sulfatation |
+        oxidative-deamination |
+        pyrrolidone-carboxylic-acid |
+        gamma-carboxyglutamic-acid |
+        blocked |
+        lipid-binding |
+        np-binding |
+        dna-binding |
+        signal-peptide |
+        transit-peptide |
+        transmembrane-region |
+        nitrosylation |
+        other
+        ) #REQUIRED >
+
+
+<!-- restriction site  (for maps really) -->
+<!ELEMENT SeqFeatData_rsite (Rsite-ref)>
+
+<!-- user defined structure -->
+<!ELEMENT SeqFeatData_user (User-object)>
+
+<!-- transcription initiation -->
+<!ELEMENT SeqFeatData_txinit (Txinit)>
+
+<!-- a numbering system -->
+<!ELEMENT SeqFeatData_num (Numbering)>
+<!-- protein secondary structure -->
+<!ELEMENT SeqFeatData_psec-str %ENUM;>
+
+<!--
+    helix	-  any helix
+    sheet	-  beta sheet
+    turn	-  beta or gamma turn
+-->
+<!ATTLIST SeqFeatData_psec-str value (
+        helix |
+        sheet |
+        turn
+        ) #REQUIRED >
+
+
+<!-- non-standard residue here in seq -->
+<!ELEMENT SeqFeatData_non-std-residue (#PCDATA)>
+
+<!-- cofactor, prosthetic grp, etc, bound to seq -->
+<!ELEMENT SeqFeatData_het (Heterogen)>
+
+<!ELEMENT SeqFeatData_biosrc (BioSource)>
+<!--
+*** Clone-ref ***********************************************
+*
+*  Specification of clone features
+*
+-->
+<!ELEMENT SeqFeatData_clone (Clone-ref)>
+
+<!ELEMENT SeqFeatData_variation (Variation-ref)>
+
+<!-- both optional because can have one or both -->
+<!ELEMENT SeqFeatXref (
+        SeqFeatXref_id?, 
+        SeqFeatXref_data?)>
+
+<!-- the feature copied -->
+<!ELEMENT SeqFeatXref_id (Feat-id)>
+
+<!-- the specific data -->
+<!ELEMENT SeqFeatXref_data (SeqFeatData)>
+
+
+<!ELEMENT SeqFeatSupport (
+        SeqFeatSupport_experiment?, 
+        SeqFeatSupport_inference?, 
+        SeqFeatSupport_model-evidence?)>
+
+<!ELEMENT SeqFeatSupport_experiment (ExperimentSupport*)>
+
+<!ELEMENT SeqFeatSupport_inference (InferenceSupport*)>
+
+<!ELEMENT SeqFeatSupport_model-evidence (ModelEvidenceSupport*)>
+
+
+<!ELEMENT EvidenceCategory (%INTEGER;)>
+<!ATTLIST EvidenceCategory value (
+        not-set |
+        coordinates |
+        description |
+        existence
+        ) #IMPLIED >
+
+
+
+<!ELEMENT ExperimentSupport (
+        ExperimentSupport_category?, 
+        ExperimentSupport_explanation, 
+        ExperimentSupport_pmids?, 
+        ExperimentSupport_dois?)>
+
+<!ELEMENT ExperimentSupport_category (EvidenceCategory)>
+
+<!ELEMENT ExperimentSupport_explanation (#PCDATA)>
+
+<!ELEMENT ExperimentSupport_pmids (PubMedId*)>
+
+<!ELEMENT ExperimentSupport_dois (DOI*)>
+
+
+<!ELEMENT Program-id (
+        Program-id_name, 
+        Program-id_version?)>
+
+<!ELEMENT Program-id_name (#PCDATA)>
+
+<!ELEMENT Program-id_version (#PCDATA)>
+
+
+<!ELEMENT EvidenceBasis (
+        EvidenceBasis_programs?, 
+        EvidenceBasis_accessions?)>
+
+<!ELEMENT EvidenceBasis_programs (Program-id*)>
+
+<!ELEMENT EvidenceBasis_accessions (Seq-id*)>
+
+
+<!ELEMENT InferenceSupport (
+        InferenceSupport_category?, 
+        InferenceSupport_type?, 
+        InferenceSupport_other-type?, 
+        InferenceSupport_same-species?, 
+        InferenceSupport_basis, 
+        InferenceSupport_pmids?, 
+        InferenceSupport_dois?)>
+
+<!ELEMENT InferenceSupport_category (EvidenceCategory)>
+
+<!ELEMENT InferenceSupport_type (%INTEGER;)>
+<!ATTLIST InferenceSupport_type value (
+        not-set |
+        similar-to-sequence |
+        similar-to-aa |
+        similar-to-dna |
+        similar-to-rna |
+        similar-to-mrna |
+        similiar-to-est |
+        similar-to-other-rna |
+        profile |
+        nucleotide-motif |
+        protein-motif |
+        ab-initio-prediction |
+        alignment |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT InferenceSupport_other-type (#PCDATA)>
+
+<!ELEMENT InferenceSupport_same-species EMPTY>
+<!ATTLIST InferenceSupport_same-species value ( true | false ) "false" >
+
+
+<!ELEMENT InferenceSupport_basis (EvidenceBasis)>
+
+<!ELEMENT InferenceSupport_pmids (PubMedId*)>
+
+<!ELEMENT InferenceSupport_dois (DOI*)>
+
+
+<!ELEMENT ModelEvidenceItem (
+        ModelEvidenceItem_id, 
+        ModelEvidenceItem_exon-count?, 
+        ModelEvidenceItem_exon-length?, 
+        ModelEvidenceItem_full-length?, 
+        ModelEvidenceItem_supports-all-exon-combo?)>
+
+<!ELEMENT ModelEvidenceItem_id (Seq-id)>
+
+<!ELEMENT ModelEvidenceItem_exon-count (%INTEGER;)>
+
+<!ELEMENT ModelEvidenceItem_exon-length (%INTEGER;)>
+
+<!ELEMENT ModelEvidenceItem_full-length EMPTY>
+<!ATTLIST ModelEvidenceItem_full-length value ( true | false ) "false" >
+
+
+<!ELEMENT ModelEvidenceItem_supports-all-exon-combo EMPTY>
+<!ATTLIST ModelEvidenceItem_supports-all-exon-combo value ( true | false ) "false" >
+
+
+
+<!ELEMENT ModelEvidenceSupport (
+        ModelEvidenceSupport_method?, 
+        ModelEvidenceSupport_mrna?, 
+        ModelEvidenceSupport_est?, 
+        ModelEvidenceSupport_protein?, 
+        ModelEvidenceSupport_identification?, 
+        ModelEvidenceSupport_dbxref?, 
+        ModelEvidenceSupport_exon-count?, 
+        ModelEvidenceSupport_exon-length?, 
+        ModelEvidenceSupport_full-length?, 
+        ModelEvidenceSupport_supports-all-exon-combo?)>
+
+<!ELEMENT ModelEvidenceSupport_method (#PCDATA)>
+
+<!ELEMENT ModelEvidenceSupport_mrna (ModelEvidenceItem*)>
+
+<!ELEMENT ModelEvidenceSupport_est (ModelEvidenceItem*)>
+
+<!ELEMENT ModelEvidenceSupport_protein (ModelEvidenceItem*)>
+
+<!ELEMENT ModelEvidenceSupport_identification (Seq-id)>
+
+<!ELEMENT ModelEvidenceSupport_dbxref (Dbtag*)>
+
+<!ELEMENT ModelEvidenceSupport_exon-count (%INTEGER;)>
+
+<!ELEMENT ModelEvidenceSupport_exon-length (%INTEGER;)>
+
+<!ELEMENT ModelEvidenceSupport_full-length EMPTY>
+<!ATTLIST ModelEvidenceSupport_full-length value ( true | false ) "false" >
+
+
+<!ELEMENT ModelEvidenceSupport_supports-all-exon-combo EMPTY>
+<!ATTLIST ModelEvidenceSupport_supports-all-exon-combo value ( true | false ) "false" >
+
+
+<!--
+*** CdRegion ***********************************************
+*
+*  Instructions to translate from a nucleic acid to a peptide
+*    conflict means it's supposed to translate but doesn't
+*
+-->
+<!ELEMENT Cdregion (
+        Cdregion_orf?, 
+        Cdregion_frame?, 
+        Cdregion_conflict?, 
+        Cdregion_gaps?, 
+        Cdregion_mismatch?, 
+        Cdregion_code?, 
+        Cdregion_code-break?, 
+        Cdregion_stops?)>
+
+<!-- just an ORF ? -->
+<!ELEMENT Cdregion_orf EMPTY>
+<!ATTLIST Cdregion_orf value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Cdregion_frame %ENUM;>
+
+<!--
+    not-set	-  not set, code uses one
+    three	-  reading frame
+-->
+<!ATTLIST Cdregion_frame value (
+        not-set |
+        one |
+        two |
+        three
+        ) #REQUIRED >
+
+
+<!-- conflict -->
+<!ELEMENT Cdregion_conflict EMPTY>
+<!ATTLIST Cdregion_conflict value ( true | false ) #REQUIRED >
+
+
+<!-- number of gaps on conflict/except -->
+<!ELEMENT Cdregion_gaps (%INTEGER;)>
+
+<!-- number of mismatches on above -->
+<!ELEMENT Cdregion_mismatch (%INTEGER;)>
+
+<!-- genetic code used -->
+<!ELEMENT Cdregion_code (Genetic-code)>
+
+<!-- individual exceptions -->
+<!ELEMENT Cdregion_code-break (Code-break*)>
+
+<!-- number of stop codons on above -->
+<!ELEMENT Cdregion_stops (%INTEGER;)>
+
+<!--
+ each code is 64 cells long, in the order where
+ T=0,C=1,A=2,G=3, TTT=0, TTC=1, TCA=4, etc
+ NOTE: this order does NOT correspond to a Seq-data
+ encoding.  It is "natural" to codon usage instead.
+ the value in each cell is the AA coded for
+ start= AA coded only if first in peptide
+   in start array, if codon is not a legitimate start
+   codon, that cell will have the "gap" symbol for
+   that alphabet.  Otherwise it will have the AA
+   encoded when that codon is used at the start.
+-->
+<!ELEMENT Genetic-code (Genetic-code_E*)>
+
+
+
+<!ELEMENT Genetic-code_E (
+        Genetic-code_E_name | 
+        Genetic-code_E_id | 
+        Genetic-code_E_ncbieaa | 
+        Genetic-code_E_ncbi8aa | 
+        Genetic-code_E_ncbistdaa | 
+        Genetic-code_E_sncbieaa | 
+        Genetic-code_E_sncbi8aa | 
+        Genetic-code_E_sncbistdaa)>
+
+<!-- name of a code -->
+<!ELEMENT Genetic-code_E_name (#PCDATA)>
+
+<!-- id in dbase -->
+<!ELEMENT Genetic-code_E_id (%INTEGER;)>
+
+<!-- indexed to IUPAC extended -->
+<!ELEMENT Genetic-code_E_ncbieaa (#PCDATA)>
+
+<!-- indexed to NCBI8aa -->
+<!ELEMENT Genetic-code_E_ncbi8aa (%OCTETS;)>
+
+<!-- indexed to NCBIstdaa -->
+<!ELEMENT Genetic-code_E_ncbistdaa (%OCTETS;)>
+
+<!-- start, indexed to IUPAC extended -->
+<!ELEMENT Genetic-code_E_sncbieaa (#PCDATA)>
+
+<!-- start, indexed to NCBI8aa -->
+<!ELEMENT Genetic-code_E_sncbi8aa (%OCTETS;)>
+
+<!-- start, indexed to NCBIstdaa -->
+<!ELEMENT Genetic-code_E_sncbistdaa (%OCTETS;)>
+
+<!--
+ specific codon exceptions
+ NCBIstdaa code
+-->
+<!ELEMENT Code-break (
+        Code-break_loc, 
+        Code-break_aa)>
+
+<!-- location of exception -->
+<!ELEMENT Code-break_loc (Seq-loc)>
+<!-- the amino acid -->
+<!ELEMENT Code-break_aa (
+        Code-break_aa_ncbieaa | 
+        Code-break_aa_ncbi8aa | 
+        Code-break_aa_ncbistdaa)>
+
+<!-- ASCII value of NCBIeaa code -->
+<!ELEMENT Code-break_aa_ncbieaa (%INTEGER;)>
+
+<!-- NCBI8aa code -->
+<!ELEMENT Code-break_aa_ncbi8aa (%INTEGER;)>
+
+<!ELEMENT Code-break_aa_ncbistdaa (%INTEGER;)>
+
+<!-- table of genetic codes -->
+<!ELEMENT Genetic-code-table (Genetic-code*)>
+
+<!--
+*** Import ***********************************************
+*
+*  Features imported from other databases
+*
+-->
+<!ELEMENT Imp-feat (
+        Imp-feat_key, 
+        Imp-feat_loc?, 
+        Imp-feat_descr?)>
+
+<!ELEMENT Imp-feat_key (#PCDATA)>
+
+<!-- original location string -->
+<!ELEMENT Imp-feat_loc (#PCDATA)>
+
+<!-- text description -->
+<!ELEMENT Imp-feat_descr (#PCDATA)>
+
+
+<!ELEMENT Gb-qual (
+        Gb-qual_qual, 
+        Gb-qual_val)>
+
+<!ELEMENT Gb-qual_qual (#PCDATA)>
+
+<!ELEMENT Gb-qual_val (#PCDATA)>
+
+<!--
+*** Clone-ref ***********************************************
+*
+*  Specification of clone features
+*
+-->
+<!ELEMENT Clone-ref (
+        Clone-ref_name, 
+        Clone-ref_library?, 
+        Clone-ref_concordant?, 
+        Clone-ref_unique?, 
+        Clone-ref_placement-method?, 
+        Clone-ref_clone-seq?)>
+
+<!-- Official clone symbol -->
+<!ELEMENT Clone-ref_name (#PCDATA)>
+
+<!-- Library name -->
+<!ELEMENT Clone-ref_library (#PCDATA)>
+
+<!-- OPTIONAL? -->
+<!ELEMENT Clone-ref_concordant EMPTY>
+<!ATTLIST Clone-ref_concordant value ( true | false ) "false" >
+
+
+<!-- OPTIONAL? -->
+<!ELEMENT Clone-ref_unique EMPTY>
+<!ATTLIST Clone-ref_unique value ( true | false ) "false" >
+
+
+<!ELEMENT Clone-ref_placement-method (%INTEGER;)>
+
+<!--
+    end-seq	-  Clone placed by end sequence
+    insert-alignment	-  Clone placed by insert alignment
+    sts	-  Clone placed by STS
+    end-seq-insert-alignment	-  combined end-seq and insert align
+    external	-  Placement provided externally
+    curated	-  Human placed or approved
+-->
+<!ATTLIST Clone-ref_placement-method value (
+        end-seq |
+        insert-alignment |
+        sts |
+        fish |
+        fingerprint |
+        end-seq-insert-alignment |
+        external |
+        curated |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Clone-ref_clone-seq (Clone-seq-set)>
+
+
+<!ELEMENT Clone-seq-set (Clone-seq*)>
+
+
+<!ELEMENT Clone-seq (
+        Clone-seq_type, 
+        Clone-seq_confidence?, 
+        Clone-seq_location, 
+        Clone-seq_seq?, 
+        Clone-seq_align-id?, 
+        Clone-seq_support?)>
+
+<!ELEMENT Clone-seq_type (%INTEGER;)>
+<!ATTLIST Clone-seq_type value (
+        insert |
+        end |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Clone-seq_confidence (%INTEGER;)>
+
+<!--
+    multiple	-  Multiple hits
+    na	-  Unspecified
+    nohit-rep	-  No hits, end flagged repetitive
+    nohitnorep	-  No hits, end not flagged repetitive
+    other-chrm	-  Hit on different chromosome
+    virtual	-  Virtual (hasn't been sequenced)
+    multiple-rep	-  Multiple hits, end flagged repetitive
+    multiplenorep	-  Multiple hits, end not flagged repetitive
+    no-hit	-  No hits
+-->
+<!ATTLIST Clone-seq_confidence value (
+        multiple |
+        na |
+        nohit-rep |
+        nohitnorep |
+        other-chrm |
+        unique |
+        virtual |
+        multiple-rep |
+        multiplenorep |
+        no-hit |
+        other
+        ) #IMPLIED >
+
+
+<!-- location on sequence -->
+<!ELEMENT Clone-seq_location (Seq-loc)>
+
+<!-- clone sequence location -->
+<!ELEMENT Clone-seq_seq (Seq-loc)>
+
+<!-- internal alignment identifier -->
+<!ELEMENT Clone-seq_align-id (Dbtag)>
+
+<!ELEMENT Clone-seq_support (%INTEGER;)>
+
+<!--
+    prototype	-  sequence used to place clone
+    supporting	-  sequence supports placement
+    supports-other	-  supports a different placement
+    non-supporting	-  does not support any placement
+-->
+<!ATTLIST Clone-seq_support value (
+        prototype |
+        supporting |
+        supports-other |
+        non-supporting
+        ) #IMPLIED >
+
+
diff --git a/dtd/NCBI_Seqloc.dtd b/dtd/NCBI_Seqloc.dtd
new file mode 100644
index 0000000..a0464a4
--- /dev/null
+++ b/dtd/NCBI_Seqloc.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqloc.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Seqloc.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Seqloc.mod.dtd b/dtd/NCBI_Seqloc.mod.dtd
new file mode 100644
index 0000000..7daa894
--- /dev/null
+++ b/dtd/NCBI_Seqloc.mod.dtd
@@ -0,0 +1,325 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqloc.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Seqloc"
+================================================= -->
+
+<!--
+$Revision: 182653 $
+**********************************************************************
+
+  NCBI Sequence location and identifier elements
+  by James Ostell, 1990
+
+  Version 3.0 - 1994
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Seq-id,
+          Seq-loc,
+          Seq-interval,
+          Packed-seqint,
+          Seq-point,
+          Packed-seqpnt,
+          Na-strand,
+          Giimport-id -->
+
+<!-- Elements referenced from other modules:
+          Object-id,
+          Int-fuzz,
+          Dbtag,
+          Date FROM NCBI-General,
+          Id-pat FROM NCBI-Biblio,
+          Feat-id FROM NCBI-Seqfeat -->
+<!-- ============================================ -->
+
+<!--
+*** Sequence identifiers ********************************
+*
+-->
+<!ELEMENT Seq-id (
+        Seq-id_local | 
+        Seq-id_gibbsq | 
+        Seq-id_gibbmt | 
+        Seq-id_giim | 
+        Seq-id_genbank | 
+        Seq-id_embl | 
+        Seq-id_pir | 
+        Seq-id_swissprot | 
+        Seq-id_patent | 
+        Seq-id_other | 
+        Seq-id_general | 
+        Seq-id_gi | 
+        Seq-id_ddbj | 
+        Seq-id_prf | 
+        Seq-id_pdb | 
+        Seq-id_tpg | 
+        Seq-id_tpe | 
+        Seq-id_tpd | 
+        Seq-id_gpipe | 
+        Seq-id_named-annot-track)>
+
+<!-- local use -->
+<!ELEMENT Seq-id_local (Object-id)>
+
+<!-- Geninfo backbone seqid -->
+<!ELEMENT Seq-id_gibbsq (%INTEGER;)>
+
+<!-- Geninfo backbone moltype -->
+<!ELEMENT Seq-id_gibbmt (%INTEGER;)>
+
+<!-- Geninfo import id -->
+<!ELEMENT Seq-id_giim (Giimport-id)>
+
+<!ELEMENT Seq-id_genbank (Textseq-id)>
+
+<!ELEMENT Seq-id_embl (Textseq-id)>
+
+<!ELEMENT Seq-id_pir (Textseq-id)>
+
+<!ELEMENT Seq-id_swissprot (Textseq-id)>
+
+<!ELEMENT Seq-id_patent (Patent-seq-id)>
+
+<!-- for historical reasons, 'other' = 'refseq' -->
+<!ELEMENT Seq-id_other (Textseq-id)>
+
+<!-- for other databases -->
+<!ELEMENT Seq-id_general (Dbtag)>
+
+<!-- GenInfo Integrated Database -->
+<!ELEMENT Seq-id_gi (%INTEGER;)>
+
+<!-- DDBJ -->
+<!ELEMENT Seq-id_ddbj (Textseq-id)>
+
+<!-- PRF SEQDB -->
+<!ELEMENT Seq-id_prf (Textseq-id)>
+
+<!-- PDB sequence -->
+<!ELEMENT Seq-id_pdb (PDB-seq-id)>
+
+<!-- Third Party Annot/Seq Genbank -->
+<!ELEMENT Seq-id_tpg (Textseq-id)>
+
+<!-- Third Party Annot/Seq EMBL -->
+<!ELEMENT Seq-id_tpe (Textseq-id)>
+
+<!-- Third Party Annot/Seq DDBJ -->
+<!ELEMENT Seq-id_tpd (Textseq-id)>
+
+<!-- Internal NCBI genome pipeline processing ID -->
+<!ELEMENT Seq-id_gpipe (Textseq-id)>
+
+<!-- Internal named annotation tracking ID -->
+<!ELEMENT Seq-id_named-annot-track (Textseq-id)>
+
+
+<!ELEMENT Seq-id-set (Seq-id*)>
+
+
+<!ELEMENT Patent-seq-id (
+        Patent-seq-id_seqid, 
+        Patent-seq-id_cit)>
+
+<!-- number of sequence in patent -->
+<!ELEMENT Patent-seq-id_seqid (%INTEGER;)>
+
+<!-- patent citation -->
+<!ELEMENT Patent-seq-id_cit (Id-pat)>
+
+
+<!ELEMENT Textseq-id (
+        Textseq-id_name?, 
+        Textseq-id_accession?, 
+        Textseq-id_release?, 
+        Textseq-id_version?)>
+
+<!ELEMENT Textseq-id_name (#PCDATA)>
+
+<!ELEMENT Textseq-id_accession (#PCDATA)>
+
+<!ELEMENT Textseq-id_release (#PCDATA)>
+
+<!ELEMENT Textseq-id_version (%INTEGER;)>
+
+
+<!ELEMENT Giimport-id (
+        Giimport-id_id, 
+        Giimport-id_db?, 
+        Giimport-id_release?)>
+
+<!-- the id to use here -->
+<!ELEMENT Giimport-id_id (%INTEGER;)>
+
+<!-- dbase used in -->
+<!ELEMENT Giimport-id_db (#PCDATA)>
+
+<!-- the release -->
+<!ELEMENT Giimport-id_release (#PCDATA)>
+
+
+<!ELEMENT PDB-seq-id (
+        PDB-seq-id_mol, 
+        PDB-seq-id_chain?, 
+        PDB-seq-id_rel?)>
+
+<!-- the molecule name -->
+<!ELEMENT PDB-seq-id_mol (PDB-mol-id)>
+
+<!-- a single ASCII character, chain id -->
+<!ELEMENT PDB-seq-id_chain (%INTEGER;)>
+
+<!-- release date, month and year -->
+<!ELEMENT PDB-seq-id_rel (Date)>
+
+<!-- name of mol, 4 chars -->
+<!ELEMENT PDB-mol-id (#PCDATA)>
+
+<!--
+*** Sequence locations **********************************
+*
+-->
+<!ELEMENT Seq-loc (
+        Seq-loc_null | 
+        Seq-loc_empty | 
+        Seq-loc_whole | 
+        Seq-loc_int | 
+        Seq-loc_packed-int | 
+        Seq-loc_pnt | 
+        Seq-loc_packed-pnt | 
+        Seq-loc_mix | 
+        Seq-loc_equiv | 
+        Seq-loc_bond | 
+        Seq-loc_feat)>
+
+<!-- not placed -->
+<!ELEMENT Seq-loc_null EMPTY>
+
+<!-- to NULL one Seq-id in a collection -->
+<!ELEMENT Seq-loc_empty (Seq-id)>
+
+<!-- whole sequence -->
+<!ELEMENT Seq-loc_whole (Seq-id)>
+
+<!-- from to -->
+<!ELEMENT Seq-loc_int (Seq-interval)>
+
+<!ELEMENT Seq-loc_packed-int (Packed-seqint)>
+
+<!ELEMENT Seq-loc_pnt (Seq-point)>
+
+<!ELEMENT Seq-loc_packed-pnt (Packed-seqpnt)>
+<!-- this will hold anything -->
+<!ELEMENT Seq-loc_mix (Seq-loc-mix)>
+
+<!-- equivalent sets of locations -->
+<!ELEMENT Seq-loc_equiv (Seq-loc-equiv)>
+<!-- bond between residues -->
+<!ELEMENT Seq-loc_bond (Seq-bond)>
+
+<!-- indirect, through a Seq-feat -->
+<!ELEMENT Seq-loc_feat (Feat-id)>
+
+
+<!ELEMENT Seq-interval (
+        Seq-interval_from, 
+        Seq-interval_to, 
+        Seq-interval_strand?, 
+        Seq-interval_id, 
+        Seq-interval_fuzz-from?, 
+        Seq-interval_fuzz-to?)>
+
+<!ELEMENT Seq-interval_from (%INTEGER;)>
+
+<!ELEMENT Seq-interval_to (%INTEGER;)>
+<!-- strand of nucleic acid -->
+<!ELEMENT Seq-interval_strand (Na-strand)>
+
+<!-- WARNING: this used to be optional -->
+<!ELEMENT Seq-interval_id (Seq-id)>
+
+<!ELEMENT Seq-interval_fuzz-from (Int-fuzz)>
+
+<!ELEMENT Seq-interval_fuzz-to (Int-fuzz)>
+
+
+<!ELEMENT Packed-seqint (Seq-interval*)>
+
+
+<!ELEMENT Seq-point (
+        Seq-point_point, 
+        Seq-point_strand?, 
+        Seq-point_id, 
+        Seq-point_fuzz?)>
+
+<!ELEMENT Seq-point_point (%INTEGER;)>
+<!-- strand of nucleic acid -->
+<!ELEMENT Seq-point_strand (Na-strand)>
+
+<!-- WARNING: this used to be optional -->
+<!ELEMENT Seq-point_id (Seq-id)>
+
+<!ELEMENT Seq-point_fuzz (Int-fuzz)>
+
+
+<!ELEMENT Packed-seqpnt (
+        Packed-seqpnt_strand?, 
+        Packed-seqpnt_id, 
+        Packed-seqpnt_fuzz?, 
+        Packed-seqpnt_points)>
+<!-- strand of nucleic acid -->
+<!ELEMENT Packed-seqpnt_strand (Na-strand)>
+<!--
+*** Sequence identifiers ********************************
+*
+-->
+<!ELEMENT Packed-seqpnt_id (Seq-id)>
+
+<!ELEMENT Packed-seqpnt_fuzz (Int-fuzz)>
+
+<!ELEMENT Packed-seqpnt_points (Packed-seqpnt_points_E*)>
+
+
+<!ELEMENT Packed-seqpnt_points_E (%INTEGER;)>
+
+<!-- strand of nucleic acid -->
+<!ELEMENT Na-strand %ENUM;>
+
+<!--
+    both	-  in forward orientation
+    both-rev	-  in reverse orientation
+-->
+<!ATTLIST Na-strand value (
+        unknown |
+        plus |
+        minus |
+        both |
+        both-rev |
+        other
+        ) #REQUIRED >
+
+
+<!-- bond between residues -->
+<!ELEMENT Seq-bond (
+        Seq-bond_a, 
+        Seq-bond_b?)>
+
+<!-- connection to a least one residue -->
+<!ELEMENT Seq-bond_a (Seq-point)>
+
+<!-- other end may not be available -->
+<!ELEMENT Seq-bond_b (Seq-point)>
+
+<!-- this will hold anything -->
+<!ELEMENT Seq-loc-mix (Seq-loc*)>
+
+<!-- for a set of equivalent locations -->
+<!ELEMENT Seq-loc-equiv (Seq-loc*)>
+
diff --git a/dtd/NCBI_Seqres.dtd b/dtd/NCBI_Seqres.dtd
new file mode 100644
index 0000000..353ff75
--- /dev/null
+++ b/dtd/NCBI_Seqres.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqres.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Seqres.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Seqres.mod.dtd b/dtd/NCBI_Seqres.mod.dtd
new file mode 100644
index 0000000..27dba62
--- /dev/null
+++ b/dtd/NCBI_Seqres.mod.dtd
@@ -0,0 +1,134 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqres.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Seqres"
+================================================= -->
+
+<!--
+$Revision: 6.0 $
+**********************************************************************
+
+  NCBI Sequence Analysis Results (other than alignments)
+  by James Ostell, 1990
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Seq-graph -->
+
+<!-- Elements referenced from other modules:
+          Seq-loc FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+<!--
+*** Sequence Graph ********************************
+*
+*   for values mapped by residue or range to sequence
+*
+-->
+<!ELEMENT Seq-graph (
+        Seq-graph_title?, 
+        Seq-graph_comment?, 
+        Seq-graph_loc, 
+        Seq-graph_title-x?, 
+        Seq-graph_title-y?, 
+        Seq-graph_comp?, 
+        Seq-graph_a?, 
+        Seq-graph_b?, 
+        Seq-graph_numval, 
+        Seq-graph_graph)>
+
+<!ELEMENT Seq-graph_title (#PCDATA)>
+
+<!ELEMENT Seq-graph_comment (#PCDATA)>
+
+<!-- region this applies to -->
+<!ELEMENT Seq-graph_loc (Seq-loc)>
+
+<!-- title for x-axis -->
+<!ELEMENT Seq-graph_title-x (#PCDATA)>
+
+<!ELEMENT Seq-graph_title-y (#PCDATA)>
+
+<!-- compression (residues/value) -->
+<!ELEMENT Seq-graph_comp (%INTEGER;)>
+
+<!-- for scaling values -->
+<!ELEMENT Seq-graph_a (%REAL;)>
+
+<!-- display = (a x value) + b -->
+<!ELEMENT Seq-graph_b (%REAL;)>
+
+<!-- number of values in graph -->
+<!ELEMENT Seq-graph_numval (%INTEGER;)>
+
+<!ELEMENT Seq-graph_graph (
+        Seq-graph_graph_real | 
+        Seq-graph_graph_int | 
+        Seq-graph_graph_byte)>
+
+<!ELEMENT Seq-graph_graph_real (Real-graph)>
+
+<!ELEMENT Seq-graph_graph_int (Int-graph)>
+<!-- integer from 0-255 -->
+<!ELEMENT Seq-graph_graph_byte (Byte-graph)>
+
+
+<!ELEMENT Real-graph (
+        Real-graph_max, 
+        Real-graph_min, 
+        Real-graph_axis, 
+        Real-graph_values)>
+
+<!-- top of graph -->
+<!ELEMENT Real-graph_max (%REAL;)>
+
+<!-- bottom of graph -->
+<!ELEMENT Real-graph_min (%REAL;)>
+
+<!-- value to draw axis on -->
+<!ELEMENT Real-graph_axis (%REAL;)>
+
+<!ELEMENT Real-graph_values (Real-graph_values_E*)>
+
+
+<!ELEMENT Real-graph_values_E (%REAL;)>
+
+
+<!ELEMENT Int-graph (
+        Int-graph_max, 
+        Int-graph_min, 
+        Int-graph_axis, 
+        Int-graph_values)>
+
+<!ELEMENT Int-graph_max (%INTEGER;)>
+
+<!ELEMENT Int-graph_min (%INTEGER;)>
+
+<!ELEMENT Int-graph_axis (%INTEGER;)>
+
+<!ELEMENT Int-graph_values (Int-graph_values_E*)>
+
+
+<!ELEMENT Int-graph_values_E (%INTEGER;)>
+
+<!-- integer from 0-255 -->
+<!ELEMENT Byte-graph (
+        Byte-graph_max, 
+        Byte-graph_min, 
+        Byte-graph_axis, 
+        Byte-graph_values)>
+
+<!ELEMENT Byte-graph_max (%INTEGER;)>
+
+<!ELEMENT Byte-graph_min (%INTEGER;)>
+
+<!ELEMENT Byte-graph_axis (%INTEGER;)>
+
+<!ELEMENT Byte-graph_values (%OCTETS;)>
+
diff --git a/dtd/NCBI_Seqset.dtd b/dtd/NCBI_Seqset.dtd
new file mode 100644
index 0000000..69de4db
--- /dev/null
+++ b/dtd/NCBI_Seqset.dtd
@@ -0,0 +1,89 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqset.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Seqset.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Seqset.mod.dtd b/dtd/NCBI_Seqset.mod.dtd
new file mode 100644
index 0000000..549d8d6
--- /dev/null
+++ b/dtd/NCBI_Seqset.mod.dtd
@@ -0,0 +1,138 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqset.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 05/02/2011 23:05:01
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Seqset"
+================================================= -->
+
+<!--
+$Revision: 279709 $
+**********************************************************************
+
+  NCBI Sequence Collections
+  by James Ostell, 1990
+
+  Version 3.0 - 1994
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Bioseq-set,
+          Seq-entry -->
+
+<!-- Elements referenced from other modules:
+          Bioseq,
+          Seq-annot,
+          Seq-descr FROM NCBI-Sequence,
+          Object-id,
+          Dbtag,
+          Date FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!--
+*** Sequence Collections ********************************
+*
+ just a collection
+-->
+<!ELEMENT Bioseq-set (
+        Bioseq-set_id?, 
+        Bioseq-set_coll?, 
+        Bioseq-set_level?, 
+        Bioseq-set_class?, 
+        Bioseq-set_release?, 
+        Bioseq-set_date?, 
+        Bioseq-set_descr?, 
+        Bioseq-set_seq-set, 
+        Bioseq-set_annot?)>
+
+<!ELEMENT Bioseq-set_id (Object-id)>
+
+<!-- to identify a collection -->
+<!ELEMENT Bioseq-set_coll (Dbtag)>
+
+<!-- nesting level -->
+<!ELEMENT Bioseq-set_level (%INTEGER;)>
+
+<!ELEMENT Bioseq-set_class %ENUM;>
+
+<!--
+    nuc-prot	-  nuc acid and coded proteins
+    segset	-  segmented sequence + parts
+    conset	-  constructed sequence + parts
+    parts	-  parts for 2 or 3
+    gibb	-  geninfo backbone
+    gi	-  geninfo
+    genbank	-  converted genbank
+    pir	-  converted pir
+    pub-set	-  all the seqs from a single publication
+    equiv	-  a set of equivalent maps or seqs
+    swissprot	-  converted SWISSPROT
+    pdb-entry	-  a complete PDB entry
+    mut-set	-  set of mutations
+    pop-set	-  population study
+    phy-set	-  phylogenetic study
+    eco-set	-  ecological sample study
+    gen-prod-set	-  genomic products, chrom+mRNA+protein
+    wgs-set	-  whole genome shotgun project
+    named-annot	-  named annotation set
+    named-annot-prod	-  with instantiated mRNA+protein
+    read-set	-  set from a single read
+    paired-end-reads	-  paired sequences within a read-set
+    small-genome-set	-  viral segments or mitochondrial minicircles
+-->
+<!ATTLIST Bioseq-set_class value (
+        not-set |
+        nuc-prot |
+        segset |
+        conset |
+        parts |
+        gibb |
+        gi |
+        genbank |
+        pir |
+        pub-set |
+        equiv |
+        swissprot |
+        pdb-entry |
+        mut-set |
+        pop-set |
+        phy-set |
+        eco-set |
+        gen-prod-set |
+        wgs-set |
+        named-annot |
+        named-annot-prod |
+        read-set |
+        paired-end-reads |
+        small-genome-set |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT Bioseq-set_release (#PCDATA)>
+
+<!ELEMENT Bioseq-set_date (Date)>
+
+<!ELEMENT Bioseq-set_descr (Seq-descr)>
+
+<!ELEMENT Bioseq-set_seq-set (Seq-entry*)>
+
+<!ELEMENT Bioseq-set_annot (Seq-annot*)>
+
+
+<!ELEMENT Seq-entry (
+        Seq-entry_seq | 
+        Seq-entry_set)>
+
+<!ELEMENT Seq-entry_seq (Bioseq)>
+<!--
+*** Sequence Collections ********************************
+*
+ just a collection
+-->
+<!ELEMENT Seq-entry_set (Bioseq-set)>
+
diff --git a/dtd/NCBI_Sequence.dtd b/dtd/NCBI_Sequence.dtd
new file mode 100644
index 0000000..78673f6
--- /dev/null
+++ b/dtd/NCBI_Sequence.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seq.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Sequence.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Sequence.mod.dtd b/dtd/NCBI_Sequence.mod.dtd
new file mode 100644
index 0000000..d09ae02
--- /dev/null
+++ b/dtd/NCBI_Sequence.mod.dtd
@@ -0,0 +1,1112 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seq.asn"
+     ::DATATOOL:: by application DATATOOL version 2.4.4
+     ::DATATOOL:: on 09/25/2012 23:04:47
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Sequence"
+================================================= -->
+
+<!--
+$Revision: 375986 $
+**********************************************************************
+
+  NCBI Sequence elements
+  by James Ostell, 1990
+  Version 3.0 - June 1994
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Annotdesc,
+          Annot-descr,
+          Bioseq,
+          GIBB-mol,
+          Heterogen,
+          MolInfo,
+          Numbering,
+          Pubdesc,
+          Seq-annot,
+          Seq-data,
+          Seqdesc,
+          Seq-descr,
+          Seq-ext,
+          Seq-hist,
+          Seq-inst,
+          Seq-literal,
+          Seqdesc,
+          Delta-ext,
+          Seq-gap -->
+
+<!-- Elements referenced from other modules:
+          Date,
+          Int-fuzz,
+          Dbtag,
+          Object-id,
+          User-object FROM NCBI-General,
+          Seq-align FROM NCBI-Seqalign,
+          Seq-feat,
+          ModelEvidenceSupport FROM NCBI-Seqfeat,
+          Seq-graph FROM NCBI-Seqres,
+          Pub-equiv FROM NCBI-Pub,
+          Org-ref FROM NCBI-Organism,
+          BioSource FROM NCBI-BioSource,
+          Seq-id,
+          Seq-loc FROM NCBI-Seqloc,
+          GB-block FROM GenBank-General,
+          PIR-block FROM PIR-General,
+          EMBL-block FROM EMBL-General,
+          SP-block FROM SP-General,
+          PRF-block FROM PRF-General,
+          PDB-block FROM PDB-General,
+          Seq-table FROM NCBI-SeqTable -->
+<!-- ============================================ -->
+
+<!--
+*** Sequence ********************************
+*
+-->
+<!ELEMENT Bioseq (
+        Bioseq_id, 
+        Bioseq_descr?, 
+        Bioseq_inst, 
+        Bioseq_annot?)>
+
+<!-- equivalent identifiers -->
+<!ELEMENT Bioseq_id (Seq-id*)>
+
+<!-- descriptors -->
+<!ELEMENT Bioseq_descr (Seq-descr)>
+
+<!-- the sequence data -->
+<!ELEMENT Bioseq_inst (Seq-inst)>
+
+<!ELEMENT Bioseq_annot (Seq-annot*)>
+
+<!--
+*** Descriptors *****************************
+*
+-->
+<!ELEMENT Seq-descr (Seqdesc*)>
+
+
+<!ELEMENT Seqdesc (
+        Seqdesc_mol-type | 
+        Seqdesc_modif | 
+        Seqdesc_method | 
+        Seqdesc_name | 
+        Seqdesc_title | 
+        Seqdesc_org | 
+        Seqdesc_comment | 
+        Seqdesc_num | 
+        Seqdesc_maploc | 
+        Seqdesc_pir | 
+        Seqdesc_genbank | 
+        Seqdesc_pub | 
+        Seqdesc_region | 
+        Seqdesc_user | 
+        Seqdesc_sp | 
+        Seqdesc_dbxref | 
+        Seqdesc_embl | 
+        Seqdesc_create-date | 
+        Seqdesc_update-date | 
+        Seqdesc_prf | 
+        Seqdesc_pdb | 
+        Seqdesc_het | 
+        Seqdesc_source | 
+        Seqdesc_molinfo | 
+        Seqdesc_modelev)>
+
+<!-- type of molecule -->
+<!ELEMENT Seqdesc_mol-type (GIBB-mol)>
+
+<!-- modifiers -->
+<!ELEMENT Seqdesc_modif (GIBB-mod*)>
+
+<!-- sequencing method -->
+<!ELEMENT Seqdesc_method (GIBB-method)>
+
+<!-- a name for this sequence -->
+<!ELEMENT Seqdesc_name (#PCDATA)>
+
+<!-- a title for this sequence -->
+<!ELEMENT Seqdesc_title (#PCDATA)>
+
+<!-- if all from one organism -->
+<!ELEMENT Seqdesc_org (Org-ref)>
+
+<!-- a more extensive comment -->
+<!ELEMENT Seqdesc_comment (#PCDATA)>
+
+<!-- a numbering system -->
+<!ELEMENT Seqdesc_num (Numbering)>
+
+<!-- map location of this sequence -->
+<!ELEMENT Seqdesc_maploc (Dbtag)>
+
+<!-- PIR specific info -->
+<!ELEMENT Seqdesc_pir (PIR-block)>
+
+<!-- GenBank specific info -->
+<!ELEMENT Seqdesc_genbank (GB-block)>
+
+<!-- a reference to the publication -->
+<!ELEMENT Seqdesc_pub (Pubdesc)>
+
+<!-- overall region (globin locus) -->
+<!ELEMENT Seqdesc_region (#PCDATA)>
+
+<!-- user defined object -->
+<!ELEMENT Seqdesc_user (User-object)>
+
+<!-- SWISSPROT specific info -->
+<!ELEMENT Seqdesc_sp (SP-block)>
+
+<!-- xref to other databases -->
+<!ELEMENT Seqdesc_dbxref (Dbtag)>
+
+<!-- EMBL specific information -->
+<!ELEMENT Seqdesc_embl (EMBL-block)>
+
+<!-- date entry first created/released -->
+<!ELEMENT Seqdesc_create-date (Date)>
+
+<!-- date of last update -->
+<!ELEMENT Seqdesc_update-date (Date)>
+
+<!-- PRF specific information -->
+<!ELEMENT Seqdesc_prf (PRF-block)>
+
+<!-- PDB specific information -->
+<!ELEMENT Seqdesc_pdb (PDB-block)>
+
+<!-- cofactor, etc associated but not bound -->
+<!ELEMENT Seqdesc_het (Heterogen)>
+
+<!-- source of materials, includes Org-ref -->
+<!ELEMENT Seqdesc_source (BioSource)>
+
+<!-- info on the molecule and techniques -->
+<!ELEMENT Seqdesc_molinfo (MolInfo)>
+
+<!-- model evidence for XM records -->
+<!ELEMENT Seqdesc_modelev (ModelEvidenceSupport)>
+
+<!--
+******* NOTE:
+*       mol-type, modif, method, and org are consolidated and expanded
+*       in Org-ref, BioSource, and MolInfo in this specification. They
+*       will be removed in later specifications. Do not use them in the
+*       the future. Instead expect the new structures.
+*
+***************************
+********************************************************************
+
+ MolInfo gives information on the
+ classification of the type and quality of the sequence
+
+ WARNING: this will replace GIBB-mol, GIBB-mod, GIBB-method
+
+********************************************************************
+-->
+<!ELEMENT MolInfo (
+        MolInfo_biomol?, 
+        MolInfo_tech?, 
+        MolInfo_techexp?, 
+        MolInfo_completeness?, 
+        MolInfo_gbmoltype?)>
+
+<!ELEMENT MolInfo_biomol (%INTEGER;)>
+
+<!--
+    pre-RNA	-  precursor RNA of any sort really
+    other-genetic	-  other genetic material
+    genomic-mRNA	-  reported a mix of genomic and cdna sequence
+    cRNA	-  viral RNA genome copy intermediate
+    snoRNA	-  small nucleolar RNA
+    transcribed-RNA	-  transcribed RNA other than existing classes
+-->
+<!ATTLIST MolInfo_biomol value (
+        unknown |
+        genomic |
+        pre-RNA |
+        mRNA |
+        rRNA |
+        tRNA |
+        snRNA |
+        scRNA |
+        peptide |
+        other-genetic |
+        genomic-mRNA |
+        cRNA |
+        snoRNA |
+        transcribed-RNA |
+        ncRNA |
+        tmRNA |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT MolInfo_tech (%INTEGER;)>
+
+<!--
+    standard	-  standard sequencing
+    est	-  Expressed Sequence Tag
+    sts	-  Sequence Tagged Site
+    survey	-  one-pass genomic sequence
+    genemap	-  from genetic mapping techniques
+    physmap	-  from physical mapping techniques
+    derived	-  derived from other data, not a primary entity
+    concept-trans	-  conceptual translation
+    seq-pept	-  peptide was sequenced
+    both	-  concept transl. w/ partial pept. seq.
+    seq-pept-overlap	-  sequenced peptide, ordered by overlap
+    seq-pept-homol	-  sequenced peptide, ordered by homology
+    concept-trans-a	-  conceptual transl. supplied by author
+    htgs-1	-  unordered High Throughput sequence contig
+    htgs-2	-  ordered High Throughput sequence contig
+    htgs-3	-  finished High Throughput sequence
+    fli-cdna	-  full length insert cDNA
+    htgs-0	-  single genomic reads for coordination
+    htc	-  high throughput cDNA
+    wgs	-  whole genome shotgun sequencing
+    barcode	-  barcode of life project
+    composite-wgs-htgs	-  composite of WGS and HTGS
+    tsa	-  transcriptome shotgun assembly
+    other	-  use Source.techexp
+-->
+<!ATTLIST MolInfo_tech value (
+        unknown |
+        standard |
+        est |
+        sts |
+        survey |
+        genemap |
+        physmap |
+        derived |
+        concept-trans |
+        seq-pept |
+        both |
+        seq-pept-overlap |
+        seq-pept-homol |
+        concept-trans-a |
+        htgs-1 |
+        htgs-2 |
+        htgs-3 |
+        fli-cdna |
+        htgs-0 |
+        htc |
+        wgs |
+        barcode |
+        composite-wgs-htgs |
+        tsa |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ explanation if tech not enough
+
+ Completeness is not indicated in most records.  For genomes, assume
+ the sequences are incomplete unless specifically marked as complete.
+ For mRNAs, assume the ends are not known exactly unless marked as
+ having the left or right end.
+
+-->
+<!ELEMENT MolInfo_techexp (#PCDATA)>
+
+<!ELEMENT MolInfo_completeness (%INTEGER;)>
+
+<!--
+    complete	-  complete biological entity
+    partial	-  partial but no details given
+    no-left	-  missing 5' or NH3 end
+    no-right	-  missing 3' or COOH end
+    no-ends	-  missing both ends
+    has-left	-  5' or NH3 end present
+    has-right	-  3' or COOH end present
+-->
+<!ATTLIST MolInfo_completeness value (
+        unknown |
+        complete |
+        partial |
+        no-left |
+        no-right |
+        no-ends |
+        has-left |
+        has-right |
+        other
+        ) #IMPLIED >
+
+
+<!-- identifies particular ncRNA -->
+<!ELEMENT MolInfo_gbmoltype (#PCDATA)>
+
+<!-- type of molecule represented -->
+<!ELEMENT GIBB-mol %ENUM;>
+
+<!--
+    pre-mRNA	-  precursor RNA of any sort really
+    other-genetic	-  other genetic material
+    genomic-mRNA	-  reported a mix of genomic and cdna sequence
+-->
+<!ATTLIST GIBB-mol value (
+        unknown |
+        genomic |
+        pre-mRNA |
+        mRNA |
+        rRNA |
+        tRNA |
+        snRNA |
+        scRNA |
+        peptide |
+        other-genetic |
+        genomic-mRNA |
+        other
+        ) #REQUIRED >
+
+
+<!-- GenInfo Backbone modifiers -->
+<!ELEMENT GIBB-mod %ENUM;>
+
+<!--
+    mutagen	-  subject of mutagenesis ?
+    natmut	-  natural mutant ?
+    no-left	-  missing left end (5' for na, NH2 for aa)
+    no-right	-  missing right end (3' or COOH)
+    est	-  expressed sequence tag
+    sts	-  sequence tagged site
+    survey	-  one pass survey sequence
+    genemap	-  is a genetic map
+    restmap	-  is an ordered restriction map
+    physmap	-  is a physical map (not ordered restriction map)
+-->
+<!ATTLIST GIBB-mod value (
+        dna |
+        rna |
+        extrachrom |
+        plasmid |
+        mitochondrial |
+        chloroplast |
+        kinetoplast |
+        cyanelle |
+        synthetic |
+        recombinant |
+        partial |
+        complete |
+        mutagen |
+        natmut |
+        transposon |
+        insertion-seq |
+        no-left |
+        no-right |
+        macronuclear |
+        proviral |
+        est |
+        sts |
+        survey |
+        chromoplast |
+        genemap |
+        restmap |
+        physmap |
+        other
+        ) #REQUIRED >
+
+
+<!-- sequencing methods -->
+<!ELEMENT GIBB-method %ENUM;>
+
+<!--
+    concept-trans	-  conceptual translation
+    seq-pept	-  peptide was sequenced
+    both	-  concept transl. w/ partial pept. seq.
+    seq-pept-overlap	-  sequenced peptide, ordered by overlap
+    seq-pept-homol	-  sequenced peptide, ordered by homology
+    concept-trans-a	-  conceptual transl. supplied by author
+-->
+<!ATTLIST GIBB-method value (
+        concept-trans |
+        seq-pept |
+        both |
+        seq-pept-overlap |
+        seq-pept-homol |
+        concept-trans-a |
+        other
+        ) #REQUIRED >
+
+
+<!-- any display numbering system -->
+<!ELEMENT Numbering (
+        Numbering_cont | 
+        Numbering_enum | 
+        Numbering_ref | 
+        Numbering_real)>
+
+<!-- continuous numbering -->
+<!ELEMENT Numbering_cont (Num-cont)>
+
+<!-- enumerated names for residues -->
+<!ELEMENT Numbering_enum (Num-enum)>
+
+<!-- by reference to another sequence -->
+<!ELEMENT Numbering_ref (Num-ref)>
+
+<!-- supports mapping to a float system -->
+<!ELEMENT Numbering_real (Num-real)>
+
+<!-- continuous display numbering system -->
+<!ELEMENT Num-cont (
+        Num-cont_refnum?, 
+        Num-cont_has-zero?, 
+        Num-cont_ascending?)>
+
+<!-- number assigned to first residue -->
+<!ELEMENT Num-cont_refnum (%INTEGER;)>
+
+<!-- 0 used? -->
+<!ELEMENT Num-cont_has-zero EMPTY>
+<!ATTLIST Num-cont_has-zero value ( true | false ) "false" >
+
+
+<!-- ascending numbers? -->
+<!ELEMENT Num-cont_ascending EMPTY>
+<!ATTLIST Num-cont_ascending value ( true | false ) "true" >
+
+
+<!-- any tags to residues -->
+<!ELEMENT Num-enum (
+        Num-enum_num, 
+        Num-enum_names)>
+
+<!-- number of tags to follow -->
+<!ELEMENT Num-enum_num (%INTEGER;)>
+
+<!-- the tags -->
+<!ELEMENT Num-enum_names (Num-enum_names_E*)>
+
+
+<!ELEMENT Num-enum_names_E (#PCDATA)>
+
+<!-- by reference to other sequences -->
+<!ELEMENT Num-ref (
+        Num-ref_type, 
+        Num-ref_aligns?)>
+<!-- type of reference -->
+<!ELEMENT Num-ref_type %ENUM;>
+
+<!--
+    sources	-  by segmented or const seq sources
+    aligns	-  by alignments given below
+-->
+<!ATTLIST Num-ref_type value (
+        not-set |
+        sources |
+        aligns
+        ) #REQUIRED >
+
+
+<!ELEMENT Num-ref_aligns (Seq-align)>
+
+<!-- mapping to floating point system -->
+<!ELEMENT Num-real (
+        Num-real_a, 
+        Num-real_b, 
+        Num-real_units?)>
+
+<!-- from an integer system used by Bioseq -->
+<!ELEMENT Num-real_a (%REAL;)>
+
+<!-- position = (a * int_position) + b -->
+<!ELEMENT Num-real_b (%REAL;)>
+
+<!ELEMENT Num-real_units (#PCDATA)>
+
+<!-- how sequence presented in pub -->
+<!ELEMENT Pubdesc (
+        Pubdesc_pub, 
+        Pubdesc_name?, 
+        Pubdesc_fig?, 
+        Pubdesc_num?, 
+        Pubdesc_numexc?, 
+        Pubdesc_poly-a?, 
+        Pubdesc_maploc?, 
+        Pubdesc_seq-raw?, 
+        Pubdesc_align-group?, 
+        Pubdesc_comment?, 
+        Pubdesc_reftype?)>
+
+<!-- the citation(s) -->
+<!ELEMENT Pubdesc_pub (Pub-equiv)>
+
+<!-- name used in paper -->
+<!ELEMENT Pubdesc_name (#PCDATA)>
+
+<!-- figure in paper -->
+<!ELEMENT Pubdesc_fig (#PCDATA)>
+
+<!-- numbering from paper -->
+<!ELEMENT Pubdesc_num (Numbering)>
+
+<!-- numbering problem with paper -->
+<!ELEMENT Pubdesc_numexc EMPTY>
+<!ATTLIST Pubdesc_numexc value ( true | false ) #REQUIRED >
+
+
+<!-- poly A tail indicated in figure? -->
+<!ELEMENT Pubdesc_poly-a EMPTY>
+<!ATTLIST Pubdesc_poly-a value ( true | false ) #REQUIRED >
+
+
+<!-- map location reported in paper -->
+<!ELEMENT Pubdesc_maploc (#PCDATA)>
+
+<!-- original sequence from paper -->
+<!ELEMENT Pubdesc_seq-raw (#PCDATA)>
+
+<!-- this seq aligned with others in paper -->
+<!ELEMENT Pubdesc_align-group (%INTEGER;)>
+
+<!-- any comment on this pub in context -->
+<!ELEMENT Pubdesc_comment (#PCDATA)>
+<!-- type of reference in a GenBank record -->
+<!ELEMENT Pubdesc_reftype (%INTEGER;)>
+
+<!--
+    seq	-  refers to sequence
+    sites	-  refers to unspecified features
+    feats	-  refers to specified features
+    no-target	-  nothing specified (EMBL)
+-->
+<!ATTLIST Pubdesc_reftype value (
+        seq |
+        sites |
+        feats |
+        no-target
+        ) #IMPLIED >
+
+
+<!-- cofactor, prosthetic group, inhibitor, etc -->
+<!ELEMENT Heterogen (#PCDATA)>
+
+<!--
+*** Instances of sequences *******************************
+*
+ the sequence data itself
+-->
+<!ELEMENT Seq-inst (
+        Seq-inst_repr, 
+        Seq-inst_mol, 
+        Seq-inst_length?, 
+        Seq-inst_fuzz?, 
+        Seq-inst_topology?, 
+        Seq-inst_strand?, 
+        Seq-inst_seq-data?, 
+        Seq-inst_ext?, 
+        Seq-inst_hist?)>
+<!-- representation class -->
+<!ELEMENT Seq-inst_repr %ENUM;>
+
+<!--
+    not-set	-  empty
+    virtual	-  no seq data
+    raw	-  continuous sequence
+    seg	-  segmented sequence
+    const	-  constructed sequence
+    ref	-  reference to another sequence
+    consen	-  consensus sequence or pattern
+    map	-  ordered map of any kind
+    delta	-  sequence made by changes (delta) to others
+-->
+<!ATTLIST Seq-inst_repr value (
+        not-set |
+        virtual |
+        raw |
+        seg |
+        const |
+        ref |
+        consen |
+        map |
+        delta |
+        other
+        ) #REQUIRED >
+
+<!-- molecule class in living organism -->
+<!ELEMENT Seq-inst_mol %ENUM;>
+
+<!--
+    not-set	-    > cdna = rna
+    na	-  just a nucleic acid
+-->
+<!ATTLIST Seq-inst_mol value (
+        not-set |
+        dna |
+        rna |
+        aa |
+        na |
+        other
+        ) #REQUIRED >
+
+
+<!-- length of sequence in residues -->
+<!ELEMENT Seq-inst_length (%INTEGER;)>
+
+<!-- length uncertainty -->
+<!ELEMENT Seq-inst_fuzz (Int-fuzz)>
+<!-- topology of molecule -->
+<!ELEMENT Seq-inst_topology %ENUM;>
+
+<!--
+    tandem	-  some part of tandem repeat
+-->
+<!ATTLIST Seq-inst_topology value (
+        not-set |
+        linear |
+        circular |
+        tandem |
+        other
+        ) #REQUIRED >
+
+<!-- strandedness in living organism -->
+<!ELEMENT Seq-inst_strand %ENUM;>
+
+<!--
+    ss	-  single strand
+    ds	-  double strand
+    other	-  default ds for DNA, ss for RNA, pept
+-->
+<!ATTLIST Seq-inst_strand value (
+        not-set |
+        ss |
+        ds |
+        mixed |
+        other
+        ) #REQUIRED >
+
+
+<!-- the sequence -->
+<!ELEMENT Seq-inst_seq-data (Seq-data)>
+
+<!-- extensions for special types -->
+<!ELEMENT Seq-inst_ext (Seq-ext)>
+
+<!-- sequence history -->
+<!ELEMENT Seq-inst_hist (Seq-hist)>
+
+<!--
+*** Sequence Extensions **********************************
+*  for representing more complex types
+*  const type uses Seq-hist.assembly
+-->
+<!ELEMENT Seq-ext (
+        Seq-ext_seg | 
+        Seq-ext_ref | 
+        Seq-ext_map | 
+        Seq-ext_delta)>
+
+<!-- segmented sequences -->
+<!ELEMENT Seq-ext_seg (Seg-ext)>
+
+<!-- hot link to another sequence (a view) -->
+<!ELEMENT Seq-ext_ref (Ref-ext)>
+
+<!-- ordered map of markers -->
+<!ELEMENT Seq-ext_map (Map-ext)>
+
+<!ELEMENT Seq-ext_delta (Delta-ext)>
+
+
+<!ELEMENT Seg-ext (Seq-loc*)>
+
+
+<!ELEMENT Ref-ext (Seq-loc)>
+
+
+<!ELEMENT Map-ext (Seq-feat*)>
+
+
+<!ELEMENT Delta-ext (Delta-seq*)>
+
+
+<!ELEMENT Delta-seq (
+        Delta-seq_loc | 
+        Delta-seq_literal)>
+
+<!-- point to a sequence -->
+<!ELEMENT Delta-seq_loc (Seq-loc)>
+
+<!-- a piece of sequence -->
+<!ELEMENT Delta-seq_literal (Seq-literal)>
+
+
+<!ELEMENT Seq-literal (
+        Seq-literal_length, 
+        Seq-literal_fuzz?, 
+        Seq-literal_seq-data?)>
+
+<!-- must give a length in residues -->
+<!ELEMENT Seq-literal_length (%INTEGER;)>
+
+<!-- could be unsure -->
+<!ELEMENT Seq-literal_fuzz (Int-fuzz)>
+
+<!-- may have the data -->
+<!ELEMENT Seq-literal_seq-data (Seq-data)>
+
+<!--
+*** Sequence History Record ***********************************
+** assembly = records how seq was assembled from others
+** replaces = records sequences made obsolete by this one
+** replaced-by = this seq is made obsolete by another(s)
+-->
+<!ELEMENT Seq-hist (
+        Seq-hist_assembly?, 
+        Seq-hist_replaces?, 
+        Seq-hist_replaced-by?, 
+        Seq-hist_deleted?)>
+
+<!-- how was this assembled? -->
+<!ELEMENT Seq-hist_assembly (Seq-align*)>
+
+<!-- seq makes these seqs obsolete -->
+<!ELEMENT Seq-hist_replaces (Seq-hist-rec)>
+
+<!-- these seqs make this one obsolete -->
+<!ELEMENT Seq-hist_replaced-by (Seq-hist-rec)>
+
+<!ELEMENT Seq-hist_deleted (
+        Seq-hist_deleted_bool | 
+        Seq-hist_deleted_date)>
+
+<!ELEMENT Seq-hist_deleted_bool EMPTY>
+<!ATTLIST Seq-hist_deleted_bool value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Seq-hist_deleted_date (Date)>
+
+
+<!ELEMENT Seq-hist-rec (
+        Seq-hist-rec_date?, 
+        Seq-hist-rec_ids)>
+
+<!ELEMENT Seq-hist-rec_date (Date)>
+
+<!ELEMENT Seq-hist-rec_ids (Seq-id*)>
+
+<!--
+*** Various internal sequence representations ************
+*      all are controlled, fixed length forms
+ sequence representations
+-->
+<!ELEMENT Seq-data (
+        Seq-data_iupacna | 
+        Seq-data_iupacaa | 
+        Seq-data_ncbi2na | 
+        Seq-data_ncbi4na | 
+        Seq-data_ncbi8na | 
+        Seq-data_ncbipna | 
+        Seq-data_ncbi8aa | 
+        Seq-data_ncbieaa | 
+        Seq-data_ncbipaa | 
+        Seq-data_ncbistdaa | 
+        Seq-data_gap)>
+
+<!-- IUPAC 1 letter nuc acid code -->
+<!ELEMENT Seq-data_iupacna (IUPACna)>
+
+<!-- IUPAC 1 letter amino acid code -->
+<!ELEMENT Seq-data_iupacaa (IUPACaa)>
+
+<!-- 2 bit nucleic acid code -->
+<!ELEMENT Seq-data_ncbi2na (NCBI2na)>
+
+<!-- 4 bit nucleic acid code -->
+<!ELEMENT Seq-data_ncbi4na (NCBI4na)>
+
+<!-- 8 bit extended nucleic acid code -->
+<!ELEMENT Seq-data_ncbi8na (NCBI8na)>
+
+<!-- nucleic acid probabilities -->
+<!ELEMENT Seq-data_ncbipna (NCBIpna)>
+
+<!-- 8 bit extended amino acid codes -->
+<!ELEMENT Seq-data_ncbi8aa (NCBI8aa)>
+
+<!-- extended ASCII 1 letter aa codes -->
+<!ELEMENT Seq-data_ncbieaa (NCBIeaa)>
+
+<!-- amino acid probabilities -->
+<!ELEMENT Seq-data_ncbipaa (NCBIpaa)>
+
+<!-- consecutive codes for std aas -->
+<!ELEMENT Seq-data_ncbistdaa (NCBIstdaa)>
+
+<!-- gap types -->
+<!ELEMENT Seq-data_gap (Seq-gap)>
+
+
+<!ELEMENT Seq-gap (
+        Seq-gap_type, 
+        Seq-gap_linkage?, 
+        Seq-gap_linkage-evidence?)>
+
+<!ELEMENT Seq-gap_type (%INTEGER;)>
+
+<!--
+    fragment	-  Deprecated. Used only for AGP 1.1
+    clone	-  Deprecated. Used only for AGP 1.1
+-->
+<!ATTLIST Seq-gap_type value (
+        unknown |
+        fragment |
+        clone |
+        short-arm |
+        heterochromatin |
+        centromere |
+        telomere |
+        repeat |
+        contig |
+        scaffold |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Seq-gap_linkage (%INTEGER;)>
+<!ATTLIST Seq-gap_linkage value (
+        unlinked |
+        linked |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Seq-gap_linkage-evidence (Linkage-evidence*)>
+
+
+<!ELEMENT Linkage-evidence (
+        Linkage-evidence_type)>
+
+<!ELEMENT Linkage-evidence_type (%INTEGER;)>
+<!ATTLIST Linkage-evidence_type value (
+        paired-ends |
+        align-genus |
+        align-xgenus |
+        align-trnscpt |
+        within-clone |
+        clone-contig |
+        map |
+        strobe |
+        unspecified |
+        pcr |
+        other
+        ) #IMPLIED >
+
+
+<!-- IUPAC 1 letter codes, no spaces -->
+<!ELEMENT IUPACna (#PCDATA)>
+
+<!-- IUPAC 1 letter codes, no spaces -->
+<!ELEMENT IUPACaa (#PCDATA)>
+
+<!-- 00=A, 01=C, 10=G, 11=T -->
+<!ELEMENT NCBI2na (%OCTETS;)>
+
+<!--
+ 1 bit each for agct
+ 0001=A, 0010=C, 0100=G, 1000=T/U
+ 0101=Purine, 1010=Pyrimidine, etc
+-->
+<!ELEMENT NCBI4na (%OCTETS;)>
+
+<!-- for modified nucleic acids -->
+<!ELEMENT NCBI8na (%OCTETS;)>
+
+<!--
+ 5 octets/base, prob for a,c,g,t,n
+ probabilities are coded 0-255 = 0.0-1.0
+-->
+<!ELEMENT NCBIpna (%OCTETS;)>
+
+<!-- for modified amino acids -->
+<!ELEMENT NCBI8aa (%OCTETS;)>
+
+<!--
+ ASCII extended 1 letter aa codes
+ IUPAC codes + U=selenocysteine
+-->
+<!ELEMENT NCBIeaa (#PCDATA)>
+
+<!--
+ 25 octets/aa, prob for IUPAC aas in order:
+ A-Y,B,Z,X,(ter),anything
+ probabilities are coded 0-255 = 0.0-1.0
+-->
+<!ELEMENT NCBIpaa (%OCTETS;)>
+
+<!-- codes 0-25, 1 per byte -->
+<!ELEMENT NCBIstdaa (%OCTETS;)>
+
+<!--
+*** Sequence Annotation *************************************
+*
+ This is a replica of Textseq-id
+ This is specific for annotations, and exists to maintain a semantic
+ difference between IDs assigned to annotations and IDs assigned to
+ sequences
+-->
+<!ELEMENT Textannot-id (
+        Textannot-id_name?, 
+        Textannot-id_accession?, 
+        Textannot-id_release?, 
+        Textannot-id_version?)>
+
+<!ELEMENT Textannot-id_name (#PCDATA)>
+
+<!ELEMENT Textannot-id_accession (#PCDATA)>
+
+<!ELEMENT Textannot-id_release (#PCDATA)>
+
+<!ELEMENT Textannot-id_version (%INTEGER;)>
+
+
+<!ELEMENT Annot-id (
+        Annot-id_local | 
+        Annot-id_ncbi | 
+        Annot-id_general | 
+        Annot-id_other)>
+
+<!ELEMENT Annot-id_local (Object-id)>
+
+<!ELEMENT Annot-id_ncbi (%INTEGER;)>
+
+<!ELEMENT Annot-id_general (Dbtag)>
+<!--
+*** Sequence Annotation *************************************
+*
+ This is a replica of Textseq-id
+ This is specific for annotations, and exists to maintain a semantic
+ difference between IDs assigned to annotations and IDs assigned to
+ sequences
+-->
+<!ELEMENT Annot-id_other (Textannot-id)>
+
+
+<!ELEMENT Annot-descr (Annotdesc*)>
+
+
+<!ELEMENT Annotdesc (
+        Annotdesc_name | 
+        Annotdesc_title | 
+        Annotdesc_comment | 
+        Annotdesc_pub | 
+        Annotdesc_user | 
+        Annotdesc_create-date | 
+        Annotdesc_update-date | 
+        Annotdesc_src | 
+        Annotdesc_align | 
+        Annotdesc_region)>
+
+<!-- a short name for this collection -->
+<!ELEMENT Annotdesc_name (#PCDATA)>
+
+<!-- a title for this collection -->
+<!ELEMENT Annotdesc_title (#PCDATA)>
+
+<!-- a more extensive comment -->
+<!ELEMENT Annotdesc_comment (#PCDATA)>
+
+<!-- a reference to the publication -->
+<!ELEMENT Annotdesc_pub (Pubdesc)>
+
+<!-- user defined object -->
+<!ELEMENT Annotdesc_user (User-object)>
+
+<!-- date entry first created/released -->
+<!ELEMENT Annotdesc_create-date (Date)>
+
+<!-- date of last update -->
+<!ELEMENT Annotdesc_update-date (Date)>
+
+<!-- source sequence from which annot came -->
+<!ELEMENT Annotdesc_src (Seq-id)>
+
+<!-- definition of the SeqAligns -->
+<!ELEMENT Annotdesc_align (Align-def)>
+
+<!-- all contents cover this region -->
+<!ELEMENT Annotdesc_region (Seq-loc)>
+
+
+<!ELEMENT Align-def (
+        Align-def_align-type, 
+        Align-def_ids?)>
+<!-- class of align Seq-annot -->
+<!ELEMENT Align-def_align-type (%INTEGER;)>
+
+<!--
+    ref	-  set of alignments to the same sequence
+    alt	-  set of alternate alignments of the same seqs
+    blocks	-  set of aligned blocks in the same seqs
+-->
+<!ATTLIST Align-def_align-type value (
+        ref |
+        alt |
+        blocks |
+        other
+        ) #IMPLIED >
+
+
+<!-- used for the one ref seqid for now -->
+<!ELEMENT Align-def_ids (Seq-id*)>
+
+<!-- features in table form -->
+<!ELEMENT Seq-annot (
+        Seq-annot_id?, 
+        Seq-annot_db?, 
+        Seq-annot_name?, 
+        Seq-annot_desc?, 
+        Seq-annot_data)>
+
+<!ELEMENT Seq-annot_id (Annot-id*)>
+<!-- source of annotation -->
+<!ELEMENT Seq-annot_db (%INTEGER;)>
+<!ATTLIST Seq-annot_db value (
+        genbank |
+        embl |
+        ddbj |
+        pir |
+        sp |
+        bbone |
+        pdb |
+        other
+        ) #IMPLIED >
+
+
+<!-- source if "other" above -->
+<!ELEMENT Seq-annot_name (#PCDATA)>
+
+<!-- used only for stand alone Seq-annots -->
+<!ELEMENT Seq-annot_desc (Annot-descr)>
+
+<!ELEMENT Seq-annot_data (
+        Seq-annot_data_ftable | 
+        Seq-annot_data_align | 
+        Seq-annot_data_graph | 
+        Seq-annot_data_ids | 
+        Seq-annot_data_locs | 
+        Seq-annot_data_seq-table)>
+
+<!ELEMENT Seq-annot_data_ftable (Seq-feat*)>
+
+<!ELEMENT Seq-annot_data_align (Seq-align*)>
+
+<!ELEMENT Seq-annot_data_graph (Seq-graph*)>
+
+<!-- used for communication between tools -->
+<!ELEMENT Seq-annot_data_ids (Seq-id*)>
+
+<!-- used for communication between tools -->
+<!ELEMENT Seq-annot_data_locs (Seq-loc*)>
+
+<!ELEMENT Seq-annot_data_seq-table (Seq-table)>
+
diff --git a/dtd/NCBI_Submit.dtd b/dtd/NCBI_Submit.dtd
new file mode 100644
index 0000000..b81b188
--- /dev/null
+++ b/dtd/NCBI_Submit.dtd
@@ -0,0 +1,92 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "submit.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Submit.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_Submit_module PUBLIC "-//NCBI//NCBI Submit Module//EN" "NCBI_Submit.mod.dtd">
+%NCBI_Submit_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Submit.mod.dtd b/dtd/NCBI_Submit.mod.dtd
new file mode 100644
index 0000000..64885f0
--- /dev/null
+++ b/dtd/NCBI_Submit.mod.dtd
@@ -0,0 +1,156 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "submit.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Submit"
+================================================= -->
+
+<!--
+$Revision: 6.1 $
+********************************************************************
+
+  Direct Submission of Sequence Data
+  James Ostell, 1991
+
+  This is a trial specification for direct submission of sequence
+    data worked out between NCBI and EMBL
+  Later revised to reflect work with GenBank and Integrated database
+
+  Version 3.0, 1994
+    This is the official NCBI sequence submission format now.
+
+********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Seq-submit,
+          Contact-info -->
+
+<!-- Elements referenced from other modules:
+          Cit-sub,
+          Author FROM NCBI-Biblio,
+          Date,
+          Object-id FROM NCBI-General,
+          Seq-annot FROM NCBI-Sequence,
+          Seq-id FROM NCBI-Seqloc,
+          Seq-entry FROM NCBI-Seqset -->
+<!-- ============================================ -->
+
+<!-- deletions of entries -->
+<!ELEMENT Seq-submit (
+        Seq-submit_sub, 
+        Seq-submit_data)>
+
+<!ELEMENT Seq-submit_sub (Submit-block)>
+
+<!ELEMENT Seq-submit_data (
+        Seq-submit_data_entrys | 
+        Seq-submit_data_annots | 
+        Seq-submit_data_delete)>
+
+<!-- sequence(s) -->
+<!ELEMENT Seq-submit_data_entrys (Seq-entry*)>
+
+<!-- annotation(s) -->
+<!ELEMENT Seq-submit_data_annots (Seq-annot*)>
+
+<!ELEMENT Seq-submit_data_delete (Seq-id*)>
+
+
+<!ELEMENT Submit-block (
+        Submit-block_contact, 
+        Submit-block_cit, 
+        Submit-block_hup?, 
+        Submit-block_reldate?, 
+        Submit-block_subtype?, 
+        Submit-block_tool?, 
+        Submit-block_user-tag?, 
+        Submit-block_comment?)>
+
+<!-- who to contact -->
+<!ELEMENT Submit-block_contact (Contact-info)>
+
+<!-- citation for this submission -->
+<!ELEMENT Submit-block_cit (Cit-sub)>
+
+<!-- hold until publish -->
+<!ELEMENT Submit-block_hup EMPTY>
+<!ATTLIST Submit-block_hup value ( true | false ) "false" >
+
+
+<!-- release by date -->
+<!ELEMENT Submit-block_reldate (Date)>
+<!-- type of submission -->
+<!ELEMENT Submit-block_subtype (%INTEGER;)>
+
+<!--
+    new	-  new data
+    update	-  update by author
+    revision	-  3rd party (non-author) update
+-->
+<!ATTLIST Submit-block_subtype value (
+        new |
+        update |
+        revision |
+        other
+        ) #IMPLIED >
+
+
+<!-- tool used to make submission -->
+<!ELEMENT Submit-block_tool (#PCDATA)>
+
+<!-- user supplied id for this submission -->
+<!ELEMENT Submit-block_user-tag (#PCDATA)>
+
+<!-- user comments/advice to database -->
+<!ELEMENT Submit-block_comment (#PCDATA)>
+
+<!-- who to contact to discuss the submission -->
+<!ELEMENT Contact-info (
+        Contact-info_name?, 
+        Contact-info_address?, 
+        Contact-info_phone?, 
+        Contact-info_fax?, 
+        Contact-info_email?, 
+        Contact-info_telex?, 
+        Contact-info_owner-id?, 
+        Contact-info_password?, 
+        Contact-info_last-name?, 
+        Contact-info_first-name?, 
+        Contact-info_middle-initial?, 
+        Contact-info_contact?)>
+
+<!-- OBSOLETE: will be removed -->
+<!ELEMENT Contact-info_name (#PCDATA)>
+
+<!ELEMENT Contact-info_address (Contact-info_address_E*)>
+
+
+<!ELEMENT Contact-info_address_E (#PCDATA)>
+
+<!ELEMENT Contact-info_phone (#PCDATA)>
+
+<!ELEMENT Contact-info_fax (#PCDATA)>
+
+<!ELEMENT Contact-info_email (#PCDATA)>
+
+<!ELEMENT Contact-info_telex (#PCDATA)>
+
+<!-- for owner accounts -->
+<!ELEMENT Contact-info_owner-id (Object-id)>
+
+<!ELEMENT Contact-info_password (%OCTETS;)>
+
+<!-- structured to replace name above -->
+<!ELEMENT Contact-info_last-name (#PCDATA)>
+
+<!ELEMENT Contact-info_first-name (#PCDATA)>
+
+<!ELEMENT Contact-info_middle-initial (#PCDATA)>
+
+<!-- WARNING: this will replace the above -->
+<!ELEMENT Contact-info_contact (Author)>
+
diff --git a/dtd/NCBI_Systems.dtd b/dtd/NCBI_Systems.dtd
new file mode 100644
index 0000000..d1f8c2a
--- /dev/null
+++ b/dtd/NCBI_Systems.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "systems.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.3
+     ::DATATOOL:: on 09/17/2009 11:55:41
+     ============================================ -->
+
+<!-- NCBI_Systems.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_Systems_module PUBLIC "-//NCBI//NCBI Systems Module//EN" "NCBI_Systems.mod.dtd">
+%NCBI_Systems_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_TSeq.dtd b/dtd/NCBI_TSeq.dtd
new file mode 100644
index 0000000..9463557
--- /dev/null
+++ b/dtd/NCBI_TSeq.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "tinyseq.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_TSeq.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_TSeq_module PUBLIC "-//NCBI//NCBI TSeq Module//EN" "NCBI_TSeq.mod.dtd">
+%NCBI_TSeq_module;
diff --git a/dtd/NCBI_TSeq.mod.dtd b/dtd/NCBI_TSeq.mod.dtd
new file mode 100644
index 0000000..e7fc3f4
--- /dev/null
+++ b/dtd/NCBI_TSeq.mod.dtd
@@ -0,0 +1,66 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "tinyseq.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-TSeq"
+================================================= -->
+
+<!--
+$Revision: 6.1 $
+**********************************************************************
+
+  ASN.1 for a tiny Bioseq in XML
+    basically a structured FASTA file with a few extras
+    in this case we drop all modularity of components
+      All ids are Optional - simpler structure, less checking
+      Components of organism are hard coded - can't easily add or change
+      sequence is just string whether DNA or protein
+  by James Ostell, 2000
+
+**********************************************************************
+-->
+
+
+<!ELEMENT TSeq (
+        TSeq_seqtype, 
+        TSeq_gi?, 
+        TSeq_accver?, 
+        TSeq_sid?, 
+        TSeq_local?, 
+        TSeq_taxid?, 
+        TSeq_orgname?, 
+        TSeq_defline, 
+        TSeq_length, 
+        TSeq_sequence)>
+
+<!ELEMENT TSeq_seqtype %ENUM;>
+<!ATTLIST TSeq_seqtype value (
+        nucleotide |
+        protein
+        ) #REQUIRED >
+
+
+<!ELEMENT TSeq_gi (%INTEGER;)>
+
+<!ELEMENT TSeq_accver (#PCDATA)>
+
+<!ELEMENT TSeq_sid (#PCDATA)>
+
+<!ELEMENT TSeq_local (#PCDATA)>
+
+<!ELEMENT TSeq_taxid (%INTEGER;)>
+
+<!ELEMENT TSeq_orgname (#PCDATA)>
+
+<!ELEMENT TSeq_defline (#PCDATA)>
+
+<!ELEMENT TSeq_length (%INTEGER;)>
+
+<!ELEMENT TSeq_sequence (#PCDATA)>
+
+<!-- a bunch of them -->
+<!ELEMENT TSeqSet (TSeq*)>
+
diff --git a/dtd/NCBI_TxInit.dtd b/dtd/NCBI_TxInit.dtd
new file mode 100644
index 0000000..fe9a6c1
--- /dev/null
+++ b/dtd/NCBI_TxInit.dtd
@@ -0,0 +1,29 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NCBI_TxInit.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
diff --git a/dtd/NCBI_TxInit.mod.dtd b/dtd/NCBI_TxInit.mod.dtd
new file mode 100644
index 0000000..d5d97c1
--- /dev/null
+++ b/dtd/NCBI_TxInit.mod.dtd
@@ -0,0 +1,184 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-TxInit"
+================================================= -->
+
+<!--
+********************************************************************
+
+  Transcription Initiation Site Feature Data Block
+  James Ostell, 1991
+  Philip Bucher, David Ghosh
+  version 1.1
+
+
+
+********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          Txinit -->
+
+<!-- Elements referenced from other modules:
+          Gene-ref FROM NCBI-Gene,
+          Prot-ref FROM NCBI-Protein,
+          Org-ref FROM NCBI-Organism -->
+<!-- ============================================ -->
+
+
+<!ELEMENT Txinit (
+        Txinit_name, 
+        Txinit_syn?, 
+        Txinit_gene?, 
+        Txinit_protein?, 
+        Txinit_rna?, 
+        Txinit_expression?, 
+        Txinit_txsystem, 
+        Txinit_txdescr?, 
+        Txinit_txorg?, 
+        Txinit_mapping-precise?, 
+        Txinit_location-accurate?, 
+        Txinit_inittype?, 
+        Txinit_evidence?)>
+
+<!-- descriptive name of initiation site -->
+<!ELEMENT Txinit_name (#PCDATA)>
+
+<!-- synonyms -->
+<!ELEMENT Txinit_syn (Txinit_syn_E*)>
+
+
+<!ELEMENT Txinit_syn_E (#PCDATA)>
+
+<!-- gene(s) transcribed -->
+<!ELEMENT Txinit_gene (Gene-ref*)>
+
+<!-- protein(s) produced -->
+<!ELEMENT Txinit_protein (Prot-ref*)>
+
+<!-- rna(s) produced -->
+<!ELEMENT Txinit_rna (Txinit_rna_E*)>
+
+
+<!ELEMENT Txinit_rna_E (#PCDATA)>
+
+<!-- tissue/time of expression -->
+<!ELEMENT Txinit_expression (#PCDATA)>
+<!-- transcription apparatus used at this site -->
+<!ELEMENT Txinit_txsystem %ENUM;>
+
+<!--
+    pol1	-  eukaryotic Pol I
+    pol2	-  eukaryotic Pol II
+    pol3	-  eukaryotic Pol III
+    rna	-  RNA replicase
+-->
+<!ATTLIST Txinit_txsystem value (
+        unknown |
+        pol1 |
+        pol2 |
+        pol3 |
+        bacterial |
+        viral |
+        rna |
+        organelle |
+        other
+        ) #REQUIRED >
+
+
+<!-- modifiers on txsystem -->
+<!ELEMENT Txinit_txdescr (#PCDATA)>
+
+<!-- organism supplying transcription apparatus -->
+<!ELEMENT Txinit_txorg (Org-ref)>
+
+<!-- mapping precise or approx -->
+<!ELEMENT Txinit_mapping-precise EMPTY>
+<!ATTLIST Txinit_mapping-precise value ( true | false ) "false" >
+
+
+<!-- does Seq-loc reflect mapping -->
+<!ELEMENT Txinit_location-accurate EMPTY>
+<!ATTLIST Txinit_location-accurate value ( true | false ) "false" >
+
+
+<!ELEMENT Txinit_inittype %ENUM;>
+<!ATTLIST Txinit_inittype value (
+        unknown |
+        single |
+        multiple |
+        region
+        ) #REQUIRED >
+
+
+<!ELEMENT Txinit_evidence (Tx-evidence*)>
+
+
+<!ELEMENT Tx-evidence (
+        Tx-evidence_exp-code, 
+        Tx-evidence_expression-system?, 
+        Tx-evidence_low-prec-data?, 
+        Tx-evidence_from-homolog?)>
+
+<!ELEMENT Tx-evidence_exp-code %ENUM;>
+
+<!--
+    rna-seq	-  direct RNA sequencing
+    rna-size	-  RNA length measurement
+    np-map	-  nuclease protection mapping with homologous sequence ladder
+    np-size	-  nuclease protected fragment length measurement
+    pe-seq	-  dideoxy RNA sequencing
+    cDNA-seq	-  full-length cDNA sequencing
+    pe-map	-  primer extension mapping with homologous sequence ladder
+    pe-size	-  primer extension product length measurement
+    pseudo-seq	-  full-length processed pseudogene sequencing
+    rev-pe-map	-  see NOTE (1) below
+-->
+<!ATTLIST Tx-evidence_exp-code value (
+        unknown |
+        rna-seq |
+        rna-size |
+        np-map |
+        np-size |
+        pe-seq |
+        cDNA-seq |
+        pe-map |
+        pe-size |
+        pseudo-seq |
+        rev-pe-map |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT Tx-evidence_expression-system %ENUM;>
+<!ATTLIST Tx-evidence_expression-system value (
+        unknown |
+        physiological |
+        in-vitro |
+        oocyte |
+        transfection |
+        transgenic |
+        other
+        ) #REQUIRED >
+
+
+<!ELEMENT Tx-evidence_low-prec-data EMPTY>
+<!ATTLIST Tx-evidence_low-prec-data value ( true | false ) "false" >
+
+
+<!-- experiment actually done on -->
+<!ELEMENT Tx-evidence_from-homolog EMPTY>
+<!ATTLIST Tx-evidence_from-homolog value ( true | false ) "false" >
+<!--
+  close homolog
+ NOTE (1) length measurement of a reverse direction primer-extension
+          product (blocked  by  RNA  5'end)  by  comparison with
+          homologous sequence ladder (J. Mol. Biol. 199, 587)
+-->
+
+
diff --git a/dtd/NCBI_Variation.dtd b/dtd/NCBI_Variation.dtd
new file mode 100644
index 0000000..7a992b1
--- /dev/null
+++ b/dtd/NCBI_Variation.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- NCBI_Variation.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/NCBI_Variation.mod.dtd b/dtd/NCBI_Variation.mod.dtd
new file mode 100644
index 0000000..ee7f020
--- /dev/null
+++ b/dtd/NCBI_Variation.mod.dtd
@@ -0,0 +1,944 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqfeat.asn"
+     ::DATATOOL:: by application DATATOOL version 2.3.1
+     ::DATATOOL:: on 12/01/2011 23:05:19
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NCBI-Variation"
+================================================= -->
+
+<!--
+*** Variation-ref ***********************************************
+*
+*  Specification of variation features
+*
+-->
+
+<!-- Elements used by other modules:
+          Variation-ref,
+          Variation-inst,
+          VariantProperties,
+          Population-data,
+          Phenotype -->
+
+<!-- Elements referenced from other modules:
+          Int-fuzz,
+          User-object,
+          Object-id,
+          Dbtag FROM NCBI-General,
+          Seq-literal FROM NCBI-Sequence,
+          SubSource FROM NCBI-BioSource,
+          Seq-loc FROM NCBI-Seqloc,
+          Pub FROM NCBI-Pub -->
+<!-- ============================================ -->
+
+<!--
+ 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Historically, the dbSNP definitions document data structures used in the
+ processing and annotation of variations by the dbSNP group.  The intention
+ is to provide information to clients that reflect internal information
+ produced during the mapping of SNPs
+ 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<!ELEMENT VariantProperties (
+        VariantProperties_version, 
+        VariantProperties_resource-link?, 
+        VariantProperties_gene-location?, 
+        VariantProperties_effect?, 
+        VariantProperties_mapping?, 
+        VariantProperties_map-weight?, 
+        VariantProperties_frequency-based-validation?, 
+        VariantProperties_genotype?, 
+        VariantProperties_project-data?, 
+        VariantProperties_quality-check?, 
+        VariantProperties_confidence?, 
+        VariantProperties_other-validation?, 
+        VariantProperties_allele-origin?, 
+        VariantProperties_allele-state?, 
+        VariantProperties_allele-frequency?, 
+        VariantProperties_is-ancestral-allele?)>
+
+<!ELEMENT VariantProperties_version (%INTEGER;)>
+<!--
+ NOTE:
+ The format for most of these values is as an integer
+ Unless otherwise noted, these integers represent a bitwise OR (= simple
+ sum) of the possible values, and as such, these values represent the
+ specific bit flags that may be set for each of the possible attributes
+ here.
+-->
+<!ELEMENT VariantProperties_resource-link (%INTEGER;)>
+
+<!--
+    preserved	-  Clinical, Pubmed, Cited, (0x01)
+    provisional	-  Provisional Third Party Annotations (0x02)
+    has3D	-  Has 3D strcture SNP3D table (0x04)
+    submitterLinkout	-  SNP->SubSNP->Batch link_out (0x08)
+    clinical	-  Clinical if LSDB, OMIM, TPA, Diagnostic (0x10)
+    genotypeKit	-  Marker exists on high density genotyping kit
+         (0x20)
+-->
+<!ATTLIST VariantProperties_resource-link value (
+        preserved |
+        provisional |
+        has3D |
+        submitterLinkout |
+        clinical |
+        genotypeKit
+        ) #IMPLIED >
+
+
+<!ELEMENT VariantProperties_gene-location (%INTEGER;)>
+
+<!--
+    in-gene	-  Sequence intervals covered by a gene ID but not
+         having an aligned transcript (0x01)
+    near-gene-5	-  Within 2kb of the 5' end of a gene feature
+    near-gene-3	-  Within 0.5kb of the 3' end of a gene feature
+    intron	-  In Intron (0x08)
+    donor	-  In donor splice-site (0x10)
+    acceptor	-  In acceptor splice-site (0x20)
+    utr-5	-  In 5' UTR (0x40)
+    utr-3	-  In 3' UTR (0x80)
+    in-start-codon	-  the variant is observed in a start codon
+         (0x100)
+    in-stop-codon	-  the variant is observed in a stop codon
+         (0x200)
+    intergenic	-  variant located between genes (0x400)
+    conserved-noncoding	-  variant is located in a conserved
+         non-coding region (0x800)
+-->
+<!ATTLIST VariantProperties_gene-location value (
+        in-gene |
+        near-gene-5 |
+        near-gene-3 |
+        intron |
+        donor |
+        acceptor |
+        utr-5 |
+        utr-3 |
+        in-start-codon |
+        in-stop-codon |
+        intergenic |
+        conserved-noncoding
+        ) #IMPLIED >
+
+
+<!ELEMENT VariantProperties_effect (%INTEGER;)>
+
+<!--
+    no-change	-  known to cause no functional changes
+         since 0 does not combine with any other bit
+         value, 'no-change' specifically implies that
+         there are no consequences
+    synonymous	-  one allele in the set does not change the encoded
+         amino acid (0x1)
+    nonsense	-  one allele in the set changes to STOP codon
+         (TER).  (0x2)
+    missense	-  one allele in the set changes protein peptide
+         (0x4)
+    frameshift	-  one allele in the set changes all downstream
+         amino acids (0x8)
+    up-regulator	-  the variant causes increased transcription
+         (0x10)
+    down-regulator	-  the variant causes decreased transcription
+         (0x20)
+    stop-gain	-  reference codon is not stop codon, but the snp
+         variant allele changes the codon to a
+         terminating codon.
+    stop-loss	-  reverse of STOP-GAIN: reference codon is a
+         stop codon, but a snp variant allele changes
+         the codon to a non-terminating codon.
+-->
+<!ATTLIST VariantProperties_effect value (
+        no-change |
+        synonymous |
+        nonsense |
+        missense |
+        frameshift |
+        up-regulator |
+        down-regulator |
+        methylation |
+        stop-gain |
+        stop-loss
+        ) #IMPLIED >
+
+
+<!ELEMENT VariantProperties_mapping (%INTEGER;)>
+
+<!--
+    has-other-snp	-  Another SNP has the same mapped positions
+         on reference assembly (0x01)
+    has-assembly-conflict	-  Weight 1 or 2 SNPs that map to different
+         chromosomes on different assemblies (0x02)
+    is-assembly-specific	-  Only maps to 1 assembly (0x04)
+-->
+<!ATTLIST VariantProperties_mapping value (
+        has-other-snp |
+        has-assembly-conflict |
+        is-assembly-specific
+        ) #IMPLIED >
+
+<!--
+ map-weight captures specificity of placement
+ NOTE: This is *NOT* a bitfield
+-->
+<!ELEMENT VariantProperties_map-weight (%INTEGER;)>
+<!ATTLIST VariantProperties_map-weight value (
+        is-uniquely-placed |
+        placed-twice-on-same-chrom |
+        placed-twice-on-diff-chrom |
+        many-placements
+        ) #IMPLIED >
+
+
+<!ELEMENT VariantProperties_frequency-based-validation (%INTEGER;)>
+
+<!--
+    is-mutation	-  low frequency variation that is cited in
+         journal or other reputable sources (0x01)
+    above-5pct-all	-  >5% minor allele freq in each and all
+         populations (0x02)
+    above-5pct-1plus	-  >5% minor allele freq in 1+ populations (0x04)
+    validated	-  Bit is set if the variant has a minor allele
+         observed in two or more separate chromosomes
+    above-1pct-all	-  >1% minor allele freq in each and all
+         populations (0x10)
+    above-1pct-1plus	-  >1% minor allele freq in 1+ populations (0x20)
+-->
+<!ATTLIST VariantProperties_frequency-based-validation value (
+        is-mutation |
+        above-5pct-all |
+        above-5pct-1plus |
+        validated |
+        above-1pct-all |
+        above-1pct-1plus
+        ) #IMPLIED >
+
+
+<!ELEMENT VariantProperties_genotype (%INTEGER;)>
+
+<!--
+    in-haplotype-set	-  Exists in a haplotype tagging set (0x01)
+    has-genotypes	-  SNP has individual genotype (0x02)
+-->
+<!ATTLIST VariantProperties_genotype value (
+        in-haplotype-set |
+        has-genotypes
+        ) #IMPLIED >
+
+
+<!--
+ project IDs are IDs from BioProjects
+ in order to report information about project relationships, we
+ require projects to be registered
+ This field in many ways duplicates dbxrefs; however, the
+ intention of this field is to more adequately reflect
+ ownership and data source
+
+ 11/9/2010: DO NOT USE
+ This field was changed in the spec in a breaking way; using it will
+ break clients.  We are officially suppressing / abandoning this field.
+ Clients who need to use this should instead place the data in
+ Seq-feat.dbxref, using the db name 'BioProject'
+-->
+<!ELEMENT VariantProperties_project-data (VariantProperties_project-data_E*)>
+
+
+<!ELEMENT VariantProperties_project-data_E (%INTEGER;)>
+
+<!ELEMENT VariantProperties_quality-check (%INTEGER;)>
+
+<!--
+    contig-allele-missing	-  Reference sequence allele at the mapped
+         position is not present in the SNP
+         allele list, adjusted for orientation
+         (0x01)
+    withdrawn-by-submitter	-  One member SS is withdrawn by submitter
+         (0x02)
+    non-overlapping-alleles	-  RS set has 2+ alleles from different
+         submissions and these sets share no
+         alleles in common (0x04)
+    strain-specific	-  Straing specific fixed difference (0x08)
+    genotype-conflict	-  Has Genotype Conflict (0x10)
+-->
+<!ATTLIST VariantProperties_quality-check value (
+        contig-allele-missing |
+        withdrawn-by-submitter |
+        non-overlapping-alleles |
+        strain-specific |
+        genotype-conflict
+        ) #IMPLIED >
+
+
+<!ELEMENT VariantProperties_confidence (%INTEGER;)>
+<!ATTLIST VariantProperties_confidence value (
+        unknown |
+        likely-artifact |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ has this variant been validated?
+ While a boolean flag offers no subtle distinctions of validation
+ methods, occasionally it is only known as a single boolean value
+ NOTE: this flag is redundant and should be omitted if more comprehensive
+ validation information is present
+-->
+<!ELEMENT VariantProperties_other-validation EMPTY>
+<!ATTLIST VariantProperties_other-validation value ( true | false ) #REQUIRED >
+
+<!--
+ origin of this allele, if known
+ note that these are powers-of-two, and represent bits; thus, we can
+ represent more than one state simultaneously through a bitwise OR
+-->
+<!ELEMENT VariantProperties_allele-origin (%INTEGER;)>
+
+<!--
+    other	-  stopper - 2^31
+-->
+<!ATTLIST VariantProperties_allele-origin value (
+        unknown |
+        germline |
+        somatic |
+        inherited |
+        paternal |
+        maternal |
+        de-novo |
+        biparental |
+        uniparental |
+        not-tested |
+        tested-inconclusive |
+        not-reported |
+        other
+        ) #IMPLIED >
+
+<!--
+ observed allele state, if known
+ NOTE: THIS IS NOT A BITFIELD!
+-->
+<!ELEMENT VariantProperties_allele-state (%INTEGER;)>
+<!ATTLIST VariantProperties_allele-state value (
+        unknown |
+        homozygous |
+        heterozygous |
+        hemizygous |
+        nullizygous |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ NOTE:
+ 'allele-frequency' here refers to the minor allele frequency of the
+ default population
+-->
+<!ELEMENT VariantProperties_allele-frequency (%REAL;)>
+
+<!-- is this variant the ancestral allele? -->
+<!ELEMENT VariantProperties_is-ancestral-allele EMPTY>
+<!ATTLIST VariantProperties_is-ancestral-allele value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT Phenotype (
+        Phenotype_source?, 
+        Phenotype_term?, 
+        Phenotype_xref?, 
+        Phenotype_clinical-significance?)>
+
+<!ELEMENT Phenotype_source (#PCDATA)>
+
+<!ELEMENT Phenotype_term (#PCDATA)>
+
+<!ELEMENT Phenotype_xref (Dbtag*)>
+<!-- does this variant have known clinical significance? -->
+<!ELEMENT Phenotype_clinical-significance (%INTEGER;)>
+<!ATTLIST Phenotype_clinical-significance value (
+        unknown |
+        untested |
+        non-pathogenic |
+        probable-non-pathogenic |
+        probable-pathogenic |
+        pathogenic |
+        drug-response |
+        histocompatibility |
+        other
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Population-data (
+        Population-data_population, 
+        Population-data_genotype-frequency?, 
+        Population-data_chromosomes-tested?, 
+        Population-data_sample-ids?, 
+        Population-data_allele-frequency?, 
+        Population-data_flags?)>
+
+<!-- assayed population (e.g. HAPMAP-CEU) -->
+<!ELEMENT Population-data_population (#PCDATA)>
+
+<!ELEMENT Population-data_genotype-frequency (%REAL;)>
+
+<!ELEMENT Population-data_chromosomes-tested (%INTEGER;)>
+
+<!ELEMENT Population-data_sample-ids (Object-id*)>
+
+<!ELEMENT Population-data_allele-frequency (%REAL;)>
+<!--
+ This field is an explicit bit-field
+ Valid values should be a bitwise combination (= simple sum)
+ of any of the values below
+-->
+<!ELEMENT Population-data_flags (%INTEGER;)>
+<!ATTLIST Population-data_flags value (
+        is-default-population |
+        is-minor-allele |
+        is-rare-allele
+        ) #IMPLIED >
+
+
+
+<!ELEMENT Ext-loc (
+        Ext-loc_id, 
+        Ext-loc_location)>
+
+<!ELEMENT Ext-loc_id (Object-id)>
+
+<!ELEMENT Ext-loc_location (Seq-loc)>
+
+
+<!ELEMENT Variation-ref (
+        Variation-ref_id?, 
+        Variation-ref_parent-id?, 
+        Variation-ref_sample-id?, 
+        Variation-ref_other-ids?, 
+        Variation-ref_name?, 
+        Variation-ref_synonyms?, 
+        Variation-ref_description?, 
+        Variation-ref_phenotype?, 
+        Variation-ref_method?, 
+        Variation-ref_population-data?, 
+        Variation-ref_variant-prop?, 
+        Variation-ref_validated?, 
+        Variation-ref_clinical-test?, 
+        Variation-ref_allele-origin?, 
+        Variation-ref_allele-state?, 
+        Variation-ref_allele-frequency?, 
+        Variation-ref_is-ancestral-allele?, 
+        Variation-ref_pub?, 
+        Variation-ref_data, 
+        Variation-ref_consequence?, 
+        Variation-ref_location?, 
+        Variation-ref_ext-locs?, 
+        Variation-ref_ext?, 
+        Variation-ref_somatic-origin?)>
+
+<!--
+ ids (i.e., SNP rsid / ssid, dbVar nsv/nssv)
+ expected values include 'dbSNP|rs12334', 'dbSNP|ss12345', 'dbVar|nsv1'
+
+ we relate three kinds of IDs here:
+  - our current object's id
+  - the id of this object's parent, if it exists
+  - the sample ID that this item originates from
+-->
+<!ELEMENT Variation-ref_id (Dbtag)>
+
+<!ELEMENT Variation-ref_parent-id (Dbtag)>
+
+<!ELEMENT Variation-ref_sample-id (Object-id)>
+
+<!ELEMENT Variation-ref_other-ids (Dbtag*)>
+
+<!--
+ names and synonyms
+ some variants have well-known canonical names and possible accepted
+ synonyms
+-->
+<!ELEMENT Variation-ref_name (#PCDATA)>
+
+<!ELEMENT Variation-ref_synonyms (Variation-ref_synonyms_E*)>
+
+
+<!ELEMENT Variation-ref_synonyms_E (#PCDATA)>
+
+<!-- tag for comment and descriptions -->
+<!ELEMENT Variation-ref_description (#PCDATA)>
+
+<!-- phenotype -->
+<!ELEMENT Variation-ref_phenotype (Phenotype*)>
+<!-- sequencing / acuisition method -->
+<!ELEMENT Variation-ref_method (Variation-ref_method_E*)>
+
+
+<!ELEMENT Variation-ref_method_E (%INTEGER;)>
+<!ATTLIST Variation-ref_method_E value (
+        unknown |
+        bac-acgh |
+        computational |
+        curated |
+        digital-array |
+        expression-array |
+        fish |
+        flanking-sequence |
+        maph |
+        mcd-analysis |
+        mlpa |
+        oea-assembly |
+        oligo-acgh |
+        paired-end |
+        pcr |
+        qpcr |
+        read-depth |
+        roma |
+        rt-pcr |
+        sage |
+        sequence-alignment |
+        sequencing |
+        snp-array |
+        snp-genoytyping |
+        southern |
+        western |
+        optical-mapping |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ Note about SNP representation and pretinent fields: allele-frequency,
+ population, quality-codes:
+ The case of multiple alleles for a SNP would be described by
+ parent-feature of type Variation-set.diff-alleles, where the child
+ features of type Variation-inst, all at the same location, would
+ describe individual alleles.
+ population data
+ DEPRECATED - do not use
+-->
+<!ELEMENT Variation-ref_population-data (Population-data*)>
+
+<!-- variant properties bit fields -->
+<!ELEMENT Variation-ref_variant-prop (VariantProperties)>
+
+<!--
+ has this variant been validated?
+ DEPRECATED: new field = VariantProperties.other-validation
+-->
+<!ELEMENT Variation-ref_validated EMPTY>
+<!ATTLIST Variation-ref_validated value ( true | false ) #REQUIRED >
+
+
+<!--
+ link-outs to GeneTests database
+ DEPRECATED - do not use
+-->
+<!ELEMENT Variation-ref_clinical-test (Dbtag*)>
+<!--
+ origin of this allele, if known
+ note that these are powers-of-two, and represent bits; thus, we can
+ represent more than one state simultaneously through a bitwise OR
+ DEPRECATED: new field = VariantProperties.allele-origin
+-->
+<!ELEMENT Variation-ref_allele-origin (%INTEGER;)>
+
+<!--
+    other	-  stopper - 2^31
+-->
+<!ATTLIST Variation-ref_allele-origin value (
+        unknown |
+        germline |
+        somatic |
+        inherited |
+        paternal |
+        maternal |
+        de-novo |
+        biparental |
+        uniparental |
+        not-tested |
+        tested-inconclusive |
+        other
+        ) #IMPLIED >
+
+<!--
+ observed allele state, if known
+ DEPRECATED: new field = VariantProperties.allele-state
+-->
+<!ELEMENT Variation-ref_allele-state (%INTEGER;)>
+<!ATTLIST Variation-ref_allele-state value (
+        unknown |
+        homozygous |
+        heterozygous |
+        hemizygous |
+        nullizygous |
+        other
+        ) #IMPLIED >
+
+
+<!--
+ NOTE:
+ 'allele-frequency' here refers to the minor allele frequency of the
+ default population
+ DEPRECATED: new field = VariantProperties.allele-frequency
+-->
+<!ELEMENT Variation-ref_allele-frequency (%REAL;)>
+
+<!--
+ is this variant the ancestral allele?
+ DEPRECATED: new field = VariantProperties.is-ancestral-allele
+-->
+<!ELEMENT Variation-ref_is-ancestral-allele EMPTY>
+<!ATTLIST Variation-ref_is-ancestral-allele value ( true | false ) #REQUIRED >
+
+
+<!--
+ publication support.
+ Note: made this pub instead of pub-equiv, since
+ Pub can be pub-equiv and pub-equiv is a set of pubs, but it looks like
+ Pub is more often used as top-level container
+ DEPRECATED - do not use; use Seq-feat.dbxref instead
+-->
+<!ELEMENT Variation-ref_pub (Pub)>
+
+<!ELEMENT Variation-ref_data (
+        Variation-ref_data_unknown | 
+        Variation-ref_data_note | 
+        Variation-ref_data_uniparental-disomy | 
+        Variation-ref_data_instance | 
+        Variation-ref_data_set | 
+        Variation-ref_data_complex)>
+
+<!ELEMENT Variation-ref_data_unknown EMPTY>
+
+<!--free-form -->
+<!ELEMENT Variation-ref_data_note (#PCDATA)>
+
+<!ELEMENT Variation-ref_data_uniparental-disomy EMPTY>
+
+<!-- actual sequence-edit at feat.location -->
+<!ELEMENT Variation-ref_data_instance (Variation-inst)>
+<!--
+ Set of related Variations.
+ Location of the set equals to the union of member locations
+-->
+<!ELEMENT Variation-ref_data_set (
+        Variation-ref_data_set_type, 
+        Variation-ref_data_set_variations, 
+        Variation-ref_data_set_name?)>
+
+<!ELEMENT Variation-ref_data_set_type (%INTEGER;)>
+
+<!--
+    compound	-  complex change at the same location on the
+         same molecule
+    products	-  different products arising from the same
+         variation in a precursor, e.g. r.[13g>a,
+         13_88del]
+    haplotype	-  changes on the same allele, e.g
+         r.[13g>a;15u>c]
+    genotype	-  changes on different alleles in the same
+         genotype, e.g. g.[476C>T]+[476C>T]
+    mosaic	-  different genotypes in the same individual
+    individual	-  same organism; allele relationship unknown,
+         e.g. g.[476C>T(+)183G>C]
+    population	-  population
+    alleles	-  set represents a set of observed alleles
+    package	-  set represents a package of observations at
+         a given location, generally containing
+         asserted + reference
+-->
+<!ATTLIST Variation-ref_data_set_type value (
+        unknown |
+        compound |
+        products |
+        haplotype |
+        genotype |
+        mosaic |
+        individual |
+        population |
+        alleles |
+        package |
+        other
+        ) #IMPLIED >
+
+
+<!ELEMENT Variation-ref_data_set_variations (Variation-ref*)>
+
+<!ELEMENT Variation-ref_data_set_name (#PCDATA)>
+
+<!--
+ variant is a complex and undescribed change at the location
+ This type of variant is known to occur in dbVar submissions
+-->
+<!ELEMENT Variation-ref_data_complex EMPTY>
+
+<!ELEMENT Variation-ref_consequence (Variation-ref_consequence_E*)>
+
+
+<!ELEMENT Variation-ref_consequence_E (
+        Variation-ref_consequence_E_unknown | 
+        Variation-ref_consequence_E_splicing | 
+        Variation-ref_consequence_E_note | 
+        Variation-ref_consequence_E_variation | 
+        Variation-ref_consequence_E_frameshift | 
+        Variation-ref_consequence_E_loss-of-heterozygosity)>
+
+<!ELEMENT Variation-ref_consequence_E_unknown EMPTY>
+
+<!--some effect on splicing -->
+<!ELEMENT Variation-ref_consequence_E_splicing EMPTY>
+
+<!--freeform -->
+<!ELEMENT Variation-ref_consequence_E_note (#PCDATA)>
+
+<!--
+ Describe resulting variation in the product, e.g. missense,
+ nonsense, silent, neutral, etc in a protein, that arises from
+ THIS variation.
+-->
+<!ELEMENT Variation-ref_consequence_E_variation (Variation-ref)>
+<!-- see http://www.hgvs.org/mutnomen/recs-prot.html -->
+<!ELEMENT Variation-ref_consequence_E_frameshift (
+        Variation-ref_consequence_E_frameshift_phase?, 
+        Variation-ref_consequence_E_frameshift_x-length?)>
+
+<!ELEMENT Variation-ref_consequence_E_frameshift_phase (%INTEGER;)>
+
+<!ELEMENT Variation-ref_consequence_E_frameshift_x-length (%INTEGER;)>
+
+<!ELEMENT Variation-ref_consequence_E_loss-of-heterozygosity (
+        Variation-ref_consequence_E_loss-of-heterozygosity_reference?, 
+        Variation-ref_consequence_E_loss-of-heterozygosity_test?)>
+
+<!--
+ In germline comparison, it will be reference genome assembly
+ (default) or reference/normal population. In somatic mutation,
+ it will be a name of the normal tissue.
+-->
+<!ELEMENT Variation-ref_consequence_E_loss-of-heterozygosity_reference (#PCDATA)>
+
+<!-- Name of the testing subject type or the testing tissue. -->
+<!ELEMENT Variation-ref_consequence_E_loss-of-heterozygosity_test (#PCDATA)>
+
+<!--
+ Observed location, if different from the parent set or feature.location.
+ DEPRECATED - do not use
+-->
+<!ELEMENT Variation-ref_location (Seq-loc)>
+
+<!--
+ reference other locs, e.g. mapped source
+ DEPRECATED - do not use
+-->
+<!ELEMENT Variation-ref_ext-locs (Ext-loc*)>
+
+<!-- DEPRECATED - do not use; use Seq-feat.exts instead -->
+<!ELEMENT Variation-ref_ext (User-object)>
+
+<!ELEMENT Variation-ref_somatic-origin (Variation-ref_somatic-origin_E*)>
+
+
+<!ELEMENT Variation-ref_somatic-origin_E (
+        Variation-ref_somatic-origin_E_source?, 
+        Variation-ref_somatic-origin_E_condition?)>
+
+<!-- description of the somatic origin itself -->
+<!ELEMENT Variation-ref_somatic-origin_E_source (SubSource)>
+<!-- condition related to this origin's type -->
+<!ELEMENT Variation-ref_somatic-origin_E_condition (
+        Variation-ref_somatic-origin_E_condition_description?, 
+        Variation-ref_somatic-origin_E_condition_object-id?)>
+
+<!ELEMENT Variation-ref_somatic-origin_E_condition_description (#PCDATA)>
+
+<!-- reference to BioTerm / other descriptive database -->
+<!ELEMENT Variation-ref_somatic-origin_E_condition_object-id (Dbtag*)>
+
+
+<!ELEMENT Delta-item (
+        Delta-item_seq?, 
+        Delta-item_multiplier?, 
+        Delta-item_multiplier-fuzz?, 
+        Delta-item_action?)>
+
+<!ELEMENT Delta-item_seq (
+        Delta-item_seq_literal | 
+        Delta-item_seq_loc | 
+        Delta-item_seq_this)>
+
+<!ELEMENT Delta-item_seq_literal (Seq-literal)>
+
+<!ELEMENT Delta-item_seq_loc (Seq-loc)>
+
+<!--same location as variation-ref itself -->
+<!ELEMENT Delta-item_seq_this EMPTY>
+
+<!--
+ Multiplier allows representing a tandem, e.g.  ATATAT as AT*3
+ This allows describing CNV/SSR where delta=self  with a
+ multiplier which specifies the count of the repeat unit.
+assumed 1 if not specified.
+-->
+<!ELEMENT Delta-item_multiplier (%INTEGER;)>
+
+<!ELEMENT Delta-item_multiplier-fuzz (Int-fuzz)>
+
+<!ELEMENT Delta-item_action (%INTEGER;)>
+
+<!--
+    morph	-  replace len(seq) positions starting with location.start with seq
+    offset	-  go downstream by distance specified by multiplier (upstream if < 0),
+         in genomic context.
+    del-at	-  excise sequence at location
+         if multiplier is specified, delete len(location)*multiplier
+         positions downstream
+    ins-before	-  insert seq before the location.start
+-->
+<!ATTLIST Delta-item_action value (
+        morph |
+        offset |
+        del-at |
+        ins-before
+        ) #IMPLIED >
+
+
+<!-- Variation instance -->
+<!ELEMENT Variation-inst (
+        Variation-inst_type, 
+        Variation-inst_delta, 
+        Variation-inst_observation?)>
+
+<!ELEMENT Variation-inst_type (%INTEGER;)>
+
+<!--
+    unknown	-  delta=[]
+    identity	-  delta=[]
+    inv	-  delta=[del, ins.seq=
+         RevComp(variation-location)]
+    snv	-  delta=[morph of length 1]
+         NOTE: this is snV not snP; the latter
+         requires frequency-based validation to be
+         established in VariantProperties
+         the strict definition of SNP is an SNV with
+         an established population frequency of at
+         least 1% in at least 1 popuplation
+    mnp	-  delta=[morph of length >1]
+    delins	-  delta=[del, ins]
+    del	-  delta=[del]
+    ins	-  delta=[ins]
+    microsatellite	-  delta=[del, ins.seq= repeat-unit with fuzzy
+         multiplier]
+         variation-location is the microsat expansion
+         on the sequence
+    transposon	-  delta=[del, ins.seq= known donor or 'this']
+         variation-location is equiv of transposon
+         locs.
+    cnv	-  delta=[del, ins= 'this' with fuzzy
+         multiplier]
+    direct-copy	-  delta=[ins.seq= upstream location on the
+         same strand]
+    rev-direct-copy	-  delta=[ins.seq= downstream location on the
+         same strand]
+    inverted-copy	-  delta=[ins.seq= upstream location on the
+         opposite strand]
+    everted-copy	-  delta=[ins.seq= downstream location on the
+         opposite strand]
+    translocation	-  delta=like delins
+    prot-missense	-  delta=[morph of length 1]
+    prot-nonsense	-  delta=[del]; variation-location is the tail
+         of the protein being truncated
+    prot-neutral	-  delta=[morph of length 1]
+    prot-silent	-  delta=[morph of length 1, same AA as at
+         variation-location]
+    prot-other	-  delta=any
+    other	-  delta=any
+-->
+<!ATTLIST Variation-inst_type value (
+        unknown |
+        identity |
+        inv |
+        snv |
+        mnp |
+        delins |
+        del |
+        ins |
+        microsatellite |
+        transposon |
+        cnv |
+        direct-copy |
+        rev-direct-copy |
+        inverted-copy |
+        everted-copy |
+        translocation |
+        prot-missense |
+        prot-nonsense |
+        prot-neutral |
+        prot-silent |
+        prot-other |
+        other
+        ) #IMPLIED >
+
+
+<!-- Sequence that replaces the location, in biological order. -->
+<!ELEMENT Variation-inst_delta (Delta-item*)>
+<!--
+ 'observation' is used to label items in a Variation-ref package
+ This field is explicitly a bit-field, so the bitwise OR (= sum) of any
+ of the values may be observed.
+-->
+<!ELEMENT Variation-inst_observation (%INTEGER;)>
+
+<!--
+    asserted	-  inst represents the asserted base at a
+         position
+    reference	-  inst represents the reference base at the
+         position
+    variant	-  inst represent the observed variant at a
+         given position
+-->
+<!ATTLIST Variation-inst_observation value (
+        asserted |
+        reference |
+        variant
+        ) #IMPLIED >
+
+
diff --git a/dtd/NCBI_all.dtd b/dtd/NCBI_all.dtd
new file mode 100644
index 0000000..3ed101d
--- /dev/null
+++ b/dtd/NCBI_all.dtd
@@ -0,0 +1,202 @@
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % Docsum_3_0_module PUBLIC "-//NCBI//Docsum 3 0 Module//EN" "Docsum_3_0.mod.dtd">
+%Docsum_3_0_module;
+
+<!ENTITY % Docsum_3_1_module PUBLIC "-//NCBI//Docsum 3 1 Module//EN" "Docsum_3_1.mod.dtd">
+%Docsum_3_1_module;
+
+<!ENTITY % Docsum_3_2_module PUBLIC "-//NCBI//Docsum 3 2 Module//EN" "Docsum_3_2.mod.dtd">
+%Docsum_3_2_module;
+
+<!ENTITY % Docsum_3_3_module PUBLIC "-//NCBI//Docsum 3 3 Module//EN" "Docsum_3_3.mod.dtd">
+%Docsum_3_3_module;
+
+<!ENTITY % Docsum_3_4_module PUBLIC "-//NCBI//Docsum 3 4 Module//EN" "Docsum_3_4.mod.dtd">
+%Docsum_3_4_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % HomoloGene_module PUBLIC "-//NCBI//HomoloGene Module//EN" "HomoloGene.mod.dtd">
+%HomoloGene_module;
+
+<!ENTITY % INSD_INSDSeq_module PUBLIC "-//NCBI//INSD INSDSeq Module//EN" "INSD_INSDSeq.mod.dtd">
+%INSD_INSDSeq_module;
+
+<!ENTITY % MMDB_module PUBLIC "-//NCBI//MMDB Module//EN" "MMDB.mod.dtd">
+%MMDB_module;
+
+<!ENTITY % MMDB_Chemical_graph_module PUBLIC "-//NCBI//MMDB Chemical graph Module//EN" "MMDB_Chemical_graph.mod.dtd">
+%MMDB_Chemical_graph_module;
+
+<!ENTITY % MMDB_Features_module PUBLIC "-//NCBI//MMDB Features Module//EN" "MMDB_Features.mod.dtd">
+%MMDB_Features_module;
+
+<!ENTITY % MMDB_Structural_model_module PUBLIC "-//NCBI//MMDB Structural model Module//EN" "MMDB_Structural_model.mod.dtd">
+%MMDB_Structural_model_module;
+
+<!ENTITY % NCBI_Access_module PUBLIC "-//NCBI//NCBI Access Module//EN" "NCBI_Access.mod.dtd">
+%NCBI_Access_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_BioTree_module PUBLIC "-//NCBI//NCBI BioTree Module//EN" "NCBI_BioTree.mod.dtd">
+%NCBI_BioTree_module;
+
+<!ENTITY % NCBI_Blast4_module PUBLIC "-//NCBI//NCBI Blast4 Module//EN" "NCBI_Blast4.mod.dtd">
+%NCBI_Blast4_module;
+
+<!ENTITY % NCBI_BlastDL_module PUBLIC "-//NCBI//NCBI BlastDL Module//EN" "NCBI_BlastDL.mod.dtd">
+%NCBI_BlastDL_module;
+
+<!ENTITY % NCBI_BlastOutput_module PUBLIC "-//NCBI//NCBI BlastOutput Module//EN" "NCBI_BlastOutput.mod.dtd">
+%NCBI_BlastOutput_module;
+
+<!ENTITY % NCBI_Cdd_module PUBLIC "-//NCBI//NCBI Cdd Module//EN" "NCBI_Cdd.mod.dtd">
+%NCBI_Cdd_module;
+
+<!ENTITY % NCBI_Cn3d_module PUBLIC "-//NCBI//NCBI Cn3d Module//EN" "NCBI_Cn3d.mod.dtd">
+%NCBI_Cn3d_module;
+
+<!ENTITY % NCBI_Entrez2_module PUBLIC "-//NCBI//NCBI Entrez2 Module//EN" "NCBI_Entrez2.mod.dtd">
+%NCBI_Entrez2_module;
+
+<!ENTITY % NCBI_Entrezgene_module PUBLIC "-//NCBI//NCBI Entrezgene Module//EN" "NCBI_Entrezgene.mod.dtd">
+%NCBI_Entrezgene_module;
+
+<!ENTITY % NCBI_FeatDef_module PUBLIC "-//NCBI//NCBI FeatDef Module//EN" "NCBI_FeatDef.mod.dtd">
+%NCBI_FeatDef_module;
+
+<!ENTITY % NCBI_GBSeq_module PUBLIC "-//NCBI//NCBI GBSeq Module//EN" "NCBI_GBSeq.mod.dtd">
+%NCBI_GBSeq_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_ID1Access_module PUBLIC "-//NCBI//NCBI ID1Access Module//EN" "NCBI_ID1Access.mod.dtd">
+%NCBI_ID1Access_module;
+
+<!ENTITY % NCBI_ID2Access_module PUBLIC "-//NCBI//NCBI ID2Access Module//EN" "NCBI_ID2Access.mod.dtd">
+%NCBI_ID2Access_module;
+
+<!ENTITY % NCBI_MedArchive_module PUBLIC "-//NCBI//NCBI MedArchive Module//EN" "NCBI_MedArchive.mod.dtd">
+%NCBI_MedArchive_module;
+
+<!ENTITY % NCBI_Medlars_module PUBLIC "-//NCBI//NCBI Medlars Module//EN" "NCBI_Medlars.mod.dtd">
+%NCBI_Medlars_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Mim_module PUBLIC "-//NCBI//NCBI Mim Module//EN" "NCBI_Mim.mod.dtd">
+%NCBI_Mim_module;
+
+<!ENTITY % NCBI_Mime_module PUBLIC "-//NCBI//NCBI Mime Module//EN" "NCBI_Mime.mod.dtd">
+%NCBI_Mime_module;
+
+<!ENTITY % NCBI_ObjPrt_module PUBLIC "-//NCBI//NCBI ObjPrt Module//EN" "NCBI_ObjPrt.mod.dtd">
+%NCBI_ObjPrt_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_PCAssay_module PUBLIC "-//NCBI//NCBI PCAssay Module//EN" "NCBI_PCAssay.mod.dtd">
+%NCBI_PCAssay_module;
+
+<!ENTITY % NCBI_PCSubstance_module PUBLIC "-//NCBI//NCBI PCSubstance Module//EN" "NCBI_PCSubstance.mod.dtd">
+%NCBI_PCSubstance_module;
+
+<!ENTITY % NCBI_Project_module PUBLIC "-//NCBI//NCBI Project Module//EN" "NCBI_Project.mod.dtd">
+%NCBI_Project_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_PubMed_module PUBLIC "-//NCBI//NCBI PubMed Module//EN" "NCBI_PubMed.mod.dtd">
+%NCBI_PubMed_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Remap_module PUBLIC "-//NCBI//NCBI Remap Module//EN" "NCBI_Remap.mod.dtd">
+%NCBI_Remap_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_ScoreMat_module PUBLIC "-//NCBI//NCBI ScoreMat Module//EN" "NCBI_ScoreMat.mod.dtd">
+%NCBI_ScoreMat_module;
+
+<!ENTITY % NCBI_SeqCode_module PUBLIC "-//NCBI//NCBI SeqCode Module//EN" "NCBI_SeqCode.mod.dtd">
+%NCBI_SeqCode_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seq_split_module PUBLIC "-//NCBI//NCBI Seq split Module//EN" "NCBI_Seq_split.mod.dtd">
+%NCBI_Seq_split_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Seqset_module PUBLIC "-//NCBI//NCBI Seqset Module//EN" "NCBI_Seqset.mod.dtd">
+%NCBI_Seqset_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_Submit_module PUBLIC "-//NCBI//NCBI Submit Module//EN" "NCBI_Submit.mod.dtd">
+%NCBI_Submit_module;
+
+<!ENTITY % NCBI_TSeq_module PUBLIC "-//NCBI//NCBI TSeq Module//EN" "NCBI_TSeq.mod.dtd">
+%NCBI_TSeq_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % NSE_module PUBLIC "-//NCBI//NSE Module//EN" "NSE.mod.dtd">
+%NSE_module;
+
+<!ENTITY % OMSSA_module PUBLIC "-//NCBI//OMSSA Module//EN" "OMSSA.mod.dtd">
+%OMSSA_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
+
diff --git a/dtd/NSE.dtd b/dtd/NSE.dtd
new file mode 100644
index 0000000..74f0075
--- /dev/null
+++ b/dtd/NSE.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- NSE.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NSE_module PUBLIC "-//NCBI//NSE Module//EN" "NSE.mod.dtd">
+%NSE_module;
diff --git a/dtd/NSE.mod.dtd b/dtd/NSE.mod.dtd
new file mode 100644
index 0000000..4327f48
--- /dev/null
+++ b/dtd/NSE.mod.dtd
@@ -0,0 +1,895 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "docsum.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "NSE"
+================================================= -->
+
+
+<!-- Elements used by other modules:
+          ExchangeSet,
+          Rs,
+          Ss,
+          MapLoc,
+          FxnSet,
+          Assembly,
+          Assay,
+          BaseURL,
+          PrimarySequence,
+          RsStruct,
+          RsLinkout,
+          Component -->
+<!-- ============================================ -->
+
+<!-- Set of dbSNP refSNP docsums -->
+<!ELEMENT ExchangeSet (
+        ExchangeSet_setType?, 
+        ExchangeSet_setDepth?, 
+        ExchangeSet_specVersion?, 
+        ExchangeSet_dbSnpBuild?, 
+        ExchangeSet_generated?, 
+        ExchangeSet_sourceDatabase, 
+        ExchangeSet_rs?, 
+        ExchangeSet_assay?, 
+        ExchangeSet_query?, 
+        ExchangeSet_summary, 
+        ExchangeSet_baseURL)>
+
+<!-- set-type: full dump; from query; single refSNP -->
+<!ELEMENT ExchangeSet_setType (#PCDATA)>
+
+<!-- content depth: brief XML (only refSNP properties and summary subSNP element content); full XML (full refSNP, full subSNP content; all flanking sequences) -->
+<!ELEMENT ExchangeSet_setDepth (#PCDATA)>
+
+<!-- version number of docsum.asn/docsum.dtd specification -->
+<!ELEMENT ExchangeSet_specVersion (#PCDATA)>
+
+<!-- build number of database for this export -->
+<!ELEMENT ExchangeSet_dbSnpBuild (%INTEGER;)>
+
+<!-- Generated date -->
+<!ELEMENT ExchangeSet_generated (#PCDATA)>
+
+<!ELEMENT ExchangeSet_sourceDatabase (
+        ExchangeSet_sourceDatabase_taxId, 
+        ExchangeSet_sourceDatabase_organism, 
+        ExchangeSet_sourceDatabase_dbSnpOrgAbbr?, 
+        ExchangeSet_sourceDatabase_gpipeOrgAbbr?)>
+
+<!-- NCBI taxonomy ID for variation -->
+<!ELEMENT ExchangeSet_sourceDatabase_taxId (%INTEGER;)>
+
+<!-- common name for species used as part of database name. -->
+<!ELEMENT ExchangeSet_sourceDatabase_organism (#PCDATA)>
+
+<!-- organism abbreviation used in dbSNP. -->
+<!ELEMENT ExchangeSet_sourceDatabase_dbSnpOrgAbbr (#PCDATA)>
+
+<!-- organism abbreviation used within NCBI genome pipeline data dumps. -->
+<!ELEMENT ExchangeSet_sourceDatabase_gpipeOrgAbbr (#PCDATA)>
+
+<!ELEMENT ExchangeSet_rs (Rs*)>
+
+<!ELEMENT ExchangeSet_assay (Assay)>
+
+<!ELEMENT ExchangeSet_query (
+        ExchangeSet_query_date?, 
+        ExchangeSet_query_string?)>
+
+<!-- yyyy-mm-dd -->
+<!ELEMENT ExchangeSet_query_date (#PCDATA)>
+
+<!-- Query terms or search constraints -->
+<!ELEMENT ExchangeSet_query_string (#PCDATA)>
+
+<!ELEMENT ExchangeSet_summary (
+        ExchangeSet_summary_numRsIds?, 
+        ExchangeSet_summary_totalSeqLength?, 
+        ExchangeSet_summary_numContigHits?, 
+        ExchangeSet_summary_numGeneHits?, 
+        ExchangeSet_summary_numGiHits?, 
+        ExchangeSet_summary_num3dStructs?, 
+        ExchangeSet_summary_numAlleleFreqs?, 
+        ExchangeSet_summary_numStsHits?, 
+        ExchangeSet_summary_numUnigeneCids?)>
+
+<!-- Total number of refsnp-ids in this exchange set -->
+<!ELEMENT ExchangeSet_summary_numRsIds (%INTEGER;)>
+
+<!-- Total length of exemplar flanking sequences -->
+<!ELEMENT ExchangeSet_summary_totalSeqLength (%INTEGER;)>
+
+<!-- Total number of contig locations from SNPContigLoc -->
+<!ELEMENT ExchangeSet_summary_numContigHits (%INTEGER;)>
+
+<!-- Total number of locus ids from SNPContigLocusId -->
+<!ELEMENT ExchangeSet_summary_numGeneHits (%INTEGER;)>
+
+<!-- Total number of gi hits from MapLink -->
+<!ELEMENT ExchangeSet_summary_numGiHits (%INTEGER;)>
+
+<!-- Total number of 3D structures from SNP3D -->
+<!ELEMENT ExchangeSet_summary_num3dStructs (%INTEGER;)>
+
+<!-- Total number of allele frequences from SubPopAllele -->
+<!ELEMENT ExchangeSet_summary_numAlleleFreqs (%INTEGER;)>
+
+<!-- Total number of STS hits from SnpInSts -->
+<!ELEMENT ExchangeSet_summary_numStsHits (%INTEGER;)>
+
+<!-- Total number of unigene cluster ids from UnigeneSnp -->
+<!ELEMENT ExchangeSet_summary_numUnigeneCids (%INTEGER;)>
+
+<!ELEMENT ExchangeSet_baseURL (BaseURL*)>
+
+<!-- defines the docsum structure for refSNP clusters, where a refSNP cluster (rs) is a grouping of individual dbSNP submissions that all refer to the same variation. The refsnp provides a single unified record for annotation of NCBI resources such as reference genome sequence. -->
+<!ELEMENT Rs (
+        Rs_rsId, 
+        Rs_snpClass, 
+        Rs_snpType, 
+        Rs_molType, 
+        Rs_validProbMin?, 
+        Rs_validProbMax?, 
+        Rs_genotype?, 
+        Rs_het?, 
+        Rs_validation, 
+        Rs_create, 
+        Rs_update?, 
+        Rs_sequence, 
+        Rs_ss, 
+        Rs_assembly?, 
+        Rs_primarySequence?, 
+        Rs_rsStruct?, 
+        Rs_rsLinkout?, 
+        Rs_mergeHistory?)>
+
+<!-- refSNP (rs) number -->
+<!ELEMENT Rs_rsId (%INTEGER;)>
+
+<!ELEMENT Rs_snpClass %ENUM;>
+<!ATTLIST Rs_snpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_snpType %ENUM;>
+<!ATTLIST Rs_snpType value (
+        notwithdrawn |
+        artifact |
+        gene-duplication |
+        duplicate-submission |
+        notspecified |
+        ambiguous-location |
+        low-map-quality
+        ) #REQUIRED >
+
+
+<!ELEMENT Rs_molType %ENUM;>
+<!ATTLIST Rs_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!-- minimum reported success rate of all submissions in cluster -->
+<!ELEMENT Rs_validProbMin (%INTEGER;)>
+
+<!-- maximum reported success rate of all submissions in cluster -->
+<!ELEMENT Rs_validProbMax (%INTEGER;)>
+
+<!-- at least one genotype reported for this refSNP -->
+<!ELEMENT Rs_genotype EMPTY>
+<!ATTLIST Rs_genotype value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_het (
+        Rs_het_type, 
+        Rs_het_value, 
+        Rs_het_stdError?)>
+
+<!-- Est=Estimated average het from allele frequencies, Obs=Observed from genotype data -->
+<!ELEMENT Rs_het_type %ENUM;>
+<!ATTLIST Rs_het_type value (
+        est |
+        obs
+        ) #REQUIRED >
+
+
+<!-- Heterozygosity -->
+<!ELEMENT Rs_het_value (%REAL;)>
+
+<!-- Standard error of Het estimate -->
+<!ELEMENT Rs_het_stdError (%REAL;)>
+
+<!ELEMENT Rs_validation (
+        Rs_validation_byCluster?, 
+        Rs_validation_byFrequency?, 
+        Rs_validation_byOtherPop?, 
+        Rs_validation_by2Hit2Allele?, 
+        Rs_validation_byHapMap?, 
+        Rs_validation_otherPopBatchId?, 
+        Rs_validation_twoHit2AlleleBatchId?)>
+
+<!-- at least one subsnp in cluster has frequency data submitted -->
+<!ELEMENT Rs_validation_byCluster EMPTY>
+<!ATTLIST Rs_validation_byCluster value ( true | false ) #REQUIRED >
+
+
+<!-- cluster has 2+ submissions, with 1+ submissions assayed with a non-computational method -->
+<!ELEMENT Rs_validation_byFrequency EMPTY>
+<!ATTLIST Rs_validation_byFrequency value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Rs_validation_byOtherPop EMPTY>
+<!ATTLIST Rs_validation_byOtherPop value ( true | false ) #REQUIRED >
+
+
+<!-- cluster has 2+ submissions, with 1+ submissions assayed with a non-computational method -->
+<!ELEMENT Rs_validation_by2Hit2Allele EMPTY>
+<!ATTLIST Rs_validation_by2Hit2Allele value ( true | false ) #REQUIRED >
+
+
+<!-- TBD -->
+<!ELEMENT Rs_validation_byHapMap EMPTY>
+<!ATTLIST Rs_validation_byHapMap value ( true | false ) #REQUIRED >
+
+
+<!-- dbSNP batch-id's for other pop snp validation data. -->
+<!ELEMENT Rs_validation_otherPopBatchId (Rs_validation_otherPopBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_otherPopBatchId_E (%INTEGER;)>
+
+<!-- dbSNP batch-id's for double-hit snp validation data. Use batch-id to get methods, etc. -->
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId (Rs_validation_twoHit2AlleleBatchId_E*)>
+
+
+<!ELEMENT Rs_validation_twoHit2AlleleBatchId_E (%INTEGER;)>
+
+<!-- date the refsnp cluster was instantiated -->
+<!ELEMENT Rs_create (
+        Rs_create_build?, 
+        Rs_create_date?)>
+
+<!-- build number when the cluster was created -->
+<!ELEMENT Rs_create_build (%INTEGER;)>
+
+<!-- yyyy-mm-dd -->
+<!ELEMENT Rs_create_date (#PCDATA)>
+
+<!-- most recent date the cluster was updated (member added or deleted) -->
+<!ELEMENT Rs_update (
+        Rs_update_build?, 
+        Rs_update_date?)>
+
+<!-- build number when the cluster was updated -->
+<!ELEMENT Rs_update_build (%INTEGER;)>
+
+<!-- yyyy-mm-dd -->
+<!ELEMENT Rs_update_date (#PCDATA)>
+
+<!ELEMENT Rs_sequence (
+        Rs_sequence_exemplarSs, 
+        Rs_sequence_seq5?, 
+        Rs_sequence_observed, 
+        Rs_sequence_seq3?)>
+
+<!-- dbSNP ss# selected as source of refSNP flanking sequence, ss# part of ss-list below -->
+<!ELEMENT Rs_sequence_exemplarSs (%INTEGER;)>
+
+<!-- 5' sequence that flanks the variation -->
+<!ELEMENT Rs_sequence_seq5 (#PCDATA)>
+
+<!-- list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation -->
+<!ELEMENT Rs_sequence_observed (#PCDATA)>
+
+<!-- 3' sequence that flanks the variation -->
+<!ELEMENT Rs_sequence_seq3 (#PCDATA)>
+
+<!ELEMENT Rs_ss (Ss*)>
+
+<!ELEMENT Rs_assembly (Assembly*)>
+
+<!ELEMENT Rs_primarySequence (PrimarySequence*)>
+
+<!ELEMENT Rs_rsStruct (RsStruct*)>
+
+<!ELEMENT Rs_rsLinkout (RsLinkout*)>
+
+<!ELEMENT Rs_mergeHistory (Rs_mergeHistory_E*)>
+
+
+<!ELEMENT Rs_mergeHistory_E (
+        Rs_mergeHistory_E_rsId, 
+        Rs_mergeHistory_E_buildId?, 
+        Rs_mergeHistory_E_orientFlip?)>
+
+<!-- previously issued rs id whose member assays have now been merged -->
+<!ELEMENT Rs_mergeHistory_E_rsId (%INTEGER;)>
+
+<!-- build id when rs id was merged into parent rs -->
+<!ELEMENT Rs_mergeHistory_E_buildId (%INTEGER;)>
+
+<!-- TRUE if strand of rs id is reverse to parent object's current strand -->
+<!ELEMENT Rs_mergeHistory_E_orientFlip EMPTY>
+<!ATTLIST Rs_mergeHistory_E_orientFlip value ( true | false ) #REQUIRED >
+
+
+<!-- data for an individual submission to dbSNP -->
+<!ELEMENT Ss (
+        Ss_ssId, 
+        Ss_handle, 
+        Ss_batchId, 
+        Ss_locSnpId?, 
+        Ss_subSnpClass?, 
+        Ss_orient?, 
+        Ss_strand?, 
+        Ss_molType?, 
+        Ss_buildId?, 
+        Ss_methodClass?, 
+        Ss_validated?, 
+        Ss_linkoutUrl?, 
+        Ss_sequence)>
+
+<!-- dbSNP accession number for submission -->
+<!ELEMENT Ss_ssId (%INTEGER;)>
+
+<!-- Tag for the submitting laboratory -->
+<!ELEMENT Ss_handle (#PCDATA)>
+
+<!-- dbSNP number for batch submission -->
+<!ELEMENT Ss_batchId (%INTEGER;)>
+
+<!-- submission (ss#) submitter ID -->
+<!ELEMENT Ss_locSnpId (#PCDATA)>
+
+<!-- SubSNP classification by type of variation -->
+<!ELEMENT Ss_subSnpClass %ENUM;>
+<!ATTLIST Ss_subSnpClass value (
+        snp |
+        in-del |
+        heterozygous |
+        microsatellite |
+        named-locus |
+        no-variation |
+        mixed |
+        multinucleotide-polymorphism
+        ) #REQUIRED >
+
+
+<!-- orientation of refsnp cluster members to refsnp cluster sequence -->
+<!ELEMENT Ss_orient %ENUM;>
+
+<!--
+    forward	-  ss flanking sequence is in same orientation as seq-ss-exemplar
+    reverse	-  lanking sequence and alleles are reverse complement of refSNP as defined by ss exemplar
+-->
+<!ATTLIST Ss_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!-- strand is defined as TOP/BOTTOM by nature of flanking nucleotide sequence -->
+<!ELEMENT Ss_strand %ENUM;>
+<!ATTLIST Ss_strand value (
+        top |
+        bottom
+        ) #REQUIRED >
+
+
+<!-- moltype from Batch table -->
+<!ELEMENT Ss_molType %ENUM;>
+<!ATTLIST Ss_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro |
+        unknown
+        ) #REQUIRED >
+
+
+<!-- dbSNP build number when ss# was added to a refSNP (rs#) cluster -->
+<!ELEMENT Ss_buildId (%INTEGER;)>
+
+<!-- class of method used to assay for the variation -->
+<!ELEMENT Ss_methodClass %ENUM;>
+
+<!--
+    dHPLC	-  Denaturing High Pressure Liquid Chromatography used to detect SNP
+    hybridize	-  a hybridization method (e.g. chip) was used to assay for variation
+    computed	-  variation was mined from sequence alignment with software
+    sequence	-  samples were sequenced and resulting alignment used to define variation
+-->
+<!ATTLIST Ss_methodClass value (
+        dHPLC |
+        hybridize |
+        computed |
+        sSCP |
+        other |
+        unknown |
+        rFLP |
+        sequence
+        ) #REQUIRED >
+
+
+<!ELEMENT Ss_validated %ENUM;>
+
+<!--
+    by-submitter	-  subsnp has been experimentally validated by submitter
+    by-frequency	-  subsnp has frequency data submitted
+    by-cluster	-  has 2+ submissions, with 1+ submission assayed with a non-computational method
+-->
+<!ATTLIST Ss_validated value (
+        by-submitter |
+        by-frequency |
+        by-cluster
+        ) #REQUIRED >
+
+
+<!-- append loc-snp-id to this base URL to construct a pointer to submitter data. -->
+<!ELEMENT Ss_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Ss_sequence (
+        Ss_sequence_seq5?, 
+        Ss_sequence_observed, 
+        Ss_sequence_seq3?)>
+
+<!-- 5' sequence that flanks the variation -->
+<!ELEMENT Ss_sequence_seq5 (#PCDATA)>
+
+<!-- list of all nucleotide alleles observed in ss-list members, correcting for reverse complementation of memebers reported in reverse orientation -->
+<!ELEMENT Ss_sequence_observed (#PCDATA)>
+
+<!-- 3' sequence that flanks the variation -->
+<!ELEMENT Ss_sequence_seq3 (#PCDATA)>
+
+<!-- Position of a single hit of a variation on a contig -->
+<!ELEMENT MapLoc (
+        MapLoc_asnFrom, 
+        MapLoc_asnTo, 
+        MapLoc_locType, 
+        MapLoc_alnQuality?, 
+        MapLoc_orient?, 
+        MapLoc_physMapInt?, 
+        MapLoc_leftFlankNeighborPos?, 
+        MapLoc_rightFlankNeighborPos?, 
+        MapLoc_leftContigNeighborPos?, 
+        MapLoc_rightContigNeighborPos?, 
+        MapLoc_numberOfMismatches?, 
+        MapLoc_numberOfDeletions?, 
+        MapLoc_numberOfInsertions?, 
+        MapLoc_fxnSet?)>
+
+<!-- beginning of variation as feature on contig -->
+<!ELEMENT MapLoc_asnFrom (%INTEGER;)>
+
+<!-- end position of variation as feature on contig -->
+<!ELEMENT MapLoc_asnTo (%INTEGER;)>
+
+<!-- defines the seq-loc symbol if asn_from != asn_to -->
+<!ELEMENT MapLoc_locType %ENUM;>
+
+<!--
+    insertion	-  insertion on contig
+    exact	-  asn-from = asn-to write as 'asn-from'
+    deletion	-  deletion on contig
+-->
+<!ATTLIST MapLoc_locType value (
+        insertion |
+        exact |
+        deletion |
+        range-ins |
+        range-exact |
+        range-del
+        ) #REQUIRED >
+
+
+<!-- alignment qualiity -->
+<!ELEMENT MapLoc_alnQuality (%REAL;)>
+
+<!-- orientation of refSNP sequence to contig sequence -->
+<!ELEMENT MapLoc_orient %ENUM;>
+<!ATTLIST MapLoc_orient value (
+        forward |
+        reverse
+        ) #REQUIRED >
+
+
+<!-- chromosome position as integer for sorting -->
+<!ELEMENT MapLoc_physMapInt (%INTEGER;)>
+
+<!-- nearest aligned position in 5' flanking sequence of snp -->
+<!ELEMENT MapLoc_leftFlankNeighborPos (%INTEGER;)>
+
+<!-- nearest aligned position in 3' flanking sequence of snp -->
+<!ELEMENT MapLoc_rightFlankNeighborPos (%INTEGER;)>
+
+<!-- nearest aligned position in 5' contig alignment of snp -->
+<!ELEMENT MapLoc_leftContigNeighborPos (%INTEGER;)>
+
+<!-- nearest aligned position in 3' contig alignment of snp -->
+<!ELEMENT MapLoc_rightContigNeighborPos (%INTEGER;)>
+
+<!-- number of Mismatched positions in this alignment -->
+<!ELEMENT MapLoc_numberOfMismatches (%INTEGER;)>
+
+<!-- number of deletions in this alignment -->
+<!ELEMENT MapLoc_numberOfDeletions (%INTEGER;)>
+
+<!-- number of insetions in this alignment -->
+<!ELEMENT MapLoc_numberOfInsertions (%INTEGER;)>
+
+<!ELEMENT MapLoc_fxnSet (FxnSet*)>
+
+<!-- functional relationship of SNP (and possibly alleles) to genes at contig location as defined in organism-specific bxxx_SNPContigLocusId_xxx tables. -->
+<!ELEMENT FxnSet (
+        FxnSet_geneId?, 
+        FxnSet_symbol?, 
+        FxnSet_mrnaAcc?, 
+        FxnSet_mrnaVer?, 
+        FxnSet_protAcc?, 
+        FxnSet_protVer?, 
+        FxnSet_fxnClass?, 
+        FxnSet_readingFrame?, 
+        FxnSet_allele?, 
+        FxnSet_residue?, 
+        FxnSet_aaPosition?)>
+
+<!-- gene-id of gene as aligned to contig -->
+<!ELEMENT FxnSet_geneId (%INTEGER;)>
+
+<!-- symbol (official if present in Entrez Gene) of gene -->
+<!ELEMENT FxnSet_symbol (#PCDATA)>
+
+<!-- mRNA accession if variation in transcript -->
+<!ELEMENT FxnSet_mrnaAcc (#PCDATA)>
+
+<!-- mRNA sequence version if variation is in transcripot -->
+<!ELEMENT FxnSet_mrnaVer (%INTEGER;)>
+
+<!-- protein accession if variation in protein -->
+<!ELEMENT FxnSet_protAcc (#PCDATA)>
+
+<!-- protein version if variation is in protein -->
+<!ELEMENT FxnSet_protVer (%INTEGER;)>
+
+<!ELEMENT FxnSet_fxnClass %ENUM;>
+
+<!--
+    locus-region	-  variation in region of gene, but not in transcript
+-->
+<!ATTLIST FxnSet_fxnClass value (
+        locus-region |
+        coding-unknown |
+        coding-synonymous |
+        coding-nonsynonymous |
+        mrna-utr |
+        intron |
+        splice-site |
+        reference |
+        coding-exception
+        ) #REQUIRED >
+
+
+<!ELEMENT FxnSet_readingFrame (%INTEGER;)>
+
+<!-- variation allele: * suffix indicates allele of contig at this location -->
+<!ELEMENT FxnSet_allele (#PCDATA)>
+
+<!-- translated amino acid residue for allele -->
+<!ELEMENT FxnSet_residue (#PCDATA)>
+
+<!-- position of the variant residue in peptide sequence -->
+<!ELEMENT FxnSet_aaPosition (%INTEGER;)>
+
+<!-- A collection of genome sequence records (curated gene regions (NG's), contigs (NWNT's)  and chromosomes (NC/AC's) produced by a genome sequence project. Structure is populated from ContigInfo tables. -->
+<!ELEMENT Assembly (
+        Assembly_dbSnpBuild, 
+        Assembly_genomeBuild, 
+        Assembly_groupLabel?, 
+        Assembly_assemblySource?, 
+        Assembly_current?, 
+        Assembly_reference?, 
+        Assembly_component?, 
+        Assembly_snpStat)>
+
+<!-- dbSNP build number defining the rsid set aligned to this assembly -->
+<!ELEMENT Assembly_dbSnpBuild (%INTEGER;)>
+
+<!-- assembly build number with possible 'subbuild' version numbers to reflect updates in gene annotation (human e.g. 34_3, 35_1, 36_1) -->
+<!ELEMENT Assembly_genomeBuild (#PCDATA)>
+
+<!-- High-level classification of the assembly to distinguish reference projects from alternate solutions. GroupLabel field from organism/build-specific ContigInfo tables. "reference" is occasionally used as the preferred assembly; standards will converge as additional organism genome projects are finished. Note that some organism assembly names include extended characters like '~' and '/' that may be incompatible with OS filename conventions. -->
+<!ELEMENT Assembly_groupLabel (#PCDATA)>
+
+<!-- Name of the group(s) or organization(s) that generated the assembly -->
+<!ELEMENT Assembly_assemblySource (#PCDATA)>
+
+<!-- Marks the current genomic assembly -->
+<!ELEMENT Assembly_current EMPTY>
+<!ATTLIST Assembly_current value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_reference EMPTY>
+<!ATTLIST Assembly_reference value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT Assembly_component (Component*)>
+
+<!ELEMENT Assembly_snpStat (
+        Assembly_snpStat_mapWeight, 
+        Assembly_snpStat_chromCount?, 
+        Assembly_snpStat_placedContigCount?, 
+        Assembly_snpStat_unplacedContigCount?, 
+        Assembly_snpStat_seqlocCount?, 
+        Assembly_snpStat_hapCount?)>
+
+<!-- summary measure of placement precision in the assembly -->
+<!ELEMENT Assembly_snpStat_mapWeight %ENUM;>
+<!ATTLIST Assembly_snpStat_mapWeight value (
+        unmapped |
+        unique-in-contig |
+        two-hits-in-contig |
+        less-10-hits |
+        multiple-hits
+        ) #REQUIRED >
+
+
+<!-- number of distinct chromosomes in the mapset -->
+<!ELEMENT Assembly_snpStat_chromCount (%INTEGER;)>
+
+<!-- number of distinct contigs [ gi | accession[.version] ] in the mapset -->
+<!ELEMENT Assembly_snpStat_placedContigCount (%INTEGER;)>
+
+<!-- number of sequence postions to a contig with unknown chromosomal assignment -->
+<!ELEMENT Assembly_snpStat_unplacedContigCount (%INTEGER;)>
+
+<!-- total number of sequence positions in the mapset -->
+<!ELEMENT Assembly_snpStat_seqlocCount (%INTEGER;)>
+
+<!-- Number of hits to alternative genomic haplotypes (e.g. HLA DR region, KIR, or pseudo-autosomal regions like PAR) within the assembly mapset. Note that positions on haplotypes defined in other assemblies (a different assembly_group_label value) will not be counted in this value. -->
+<!ELEMENT Assembly_snpStat_hapCount (%INTEGER;)>
+
+
+<!ELEMENT Assay (
+        Assay_handle?, 
+        Assay_batch?, 
+        Assay_batchId?, 
+        Assay_batchType?, 
+        Assay_molType?, 
+        Assay_sampleSize?, 
+        Assay_population?, 
+        Assay_linkoutUrl?, 
+        Assay_method?, 
+        Assay_taxonomy, 
+        Assay_strains?, 
+        Assay_comment?, 
+        Assay_citation?)>
+
+<!ELEMENT Assay_handle (#PCDATA)>
+
+<!ELEMENT Assay_batch (#PCDATA)>
+
+<!ELEMENT Assay_batchId (%INTEGER;)>
+
+<!ELEMENT Assay_batchType %ENUM;>
+<!ATTLIST Assay_batchType value (
+        snpassay |
+        validation |
+        doublehit
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_molType %ENUM;>
+<!ATTLIST Assay_molType value (
+        genomic |
+        cDNA |
+        mito |
+        chloro
+        ) #REQUIRED >
+
+
+<!ELEMENT Assay_sampleSize (%INTEGER;)>
+
+<!ELEMENT Assay_population (#PCDATA)>
+
+<!ELEMENT Assay_linkoutUrl (#PCDATA)>
+
+<!ELEMENT Assay_method (
+        Assay_method_name?, 
+        Assay_method_id?, 
+        Assay_method_exception)>
+
+<!-- Submitters method identifier -->
+<!ELEMENT Assay_method_name (#PCDATA)>
+
+<!-- dbSNP method identifier -->
+<!ELEMENT Assay_method_id (#PCDATA)>
+
+<!-- description of deviation from/addition to given method -->
+<!ELEMENT Assay_method_exception (#PCDATA)>
+
+<!ELEMENT Assay_taxonomy (
+        Assay_taxonomy_id, 
+        Assay_taxonomy_organism?)>
+
+<!-- NCBI taxonomy ID for variation -->
+<!ELEMENT Assay_taxonomy_id (%INTEGER;)>
+
+<!ELEMENT Assay_taxonomy_organism (#PCDATA)>
+
+<!ELEMENT Assay_strains (Assay_strains_E*)>
+
+
+<!ELEMENT Assay_strains_E (#PCDATA)>
+
+<!ELEMENT Assay_comment (#PCDATA)>
+
+<!ELEMENT Assay_citation (Assay_citation_E*)>
+
+
+<!ELEMENT Assay_citation_E (#PCDATA)>
+
+<!-- URL value from dbSNP_main.BaseURL links table. attributes provide context information and URL id that is referenced within individual refSNP objects. -->
+<!ELEMENT BaseURL (
+        BaseURL_urlId?, 
+        BaseURL_resourceName?, 
+        BaseURL_resourceId?, 
+        BaseURL_baseURL)>
+
+<!-- Resource identifier from dbSNP_main.baseURL. -->
+<!ELEMENT BaseURL_urlId (%INTEGER;)>
+
+<!-- Name of linked resource -->
+<!ELEMENT BaseURL_resourceName (#PCDATA)>
+
+<!-- identifier expected by resource for URL -->
+<!ELEMENT BaseURL_resourceId (#PCDATA)>
+
+<!ELEMENT BaseURL_baseURL (#PCDATA)>
+
+
+<!ELEMENT PrimarySequence (
+        PrimarySequence_dbSnpBuild, 
+        PrimarySequence_gi, 
+        PrimarySequence_source?, 
+        PrimarySequence_accession?, 
+        PrimarySequence_mapLoc)>
+
+<!ELEMENT PrimarySequence_dbSnpBuild (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_gi (%INTEGER;)>
+
+<!ELEMENT PrimarySequence_source %ENUM;>
+<!ATTLIST PrimarySequence_source value (
+        submitter |
+        blastmb |
+        xm
+        ) #REQUIRED >
+
+
+<!ELEMENT PrimarySequence_accession (#PCDATA)>
+
+<!ELEMENT PrimarySequence_mapLoc (MapLoc*)>
+
+<!-- structure information for SNP -->
+<!ELEMENT RsStruct (
+        RsStruct_protAcc?, 
+        RsStruct_protGi?, 
+        RsStruct_protLoc?, 
+        RsStruct_protResidue?, 
+        RsStruct_rsResidue?, 
+        RsStruct_structGi?, 
+        RsStruct_structLoc?, 
+        RsStruct_structResidue?)>
+
+<!-- accession of the protein with variation -->
+<!ELEMENT RsStruct_protAcc (#PCDATA)>
+
+<!-- GI of the protein with variation -->
+<!ELEMENT RsStruct_protGi (%INTEGER;)>
+
+<!-- position of the residue for the protein GI -->
+<!ELEMENT RsStruct_protLoc (%INTEGER;)>
+
+<!-- residue specified for protein at prot-loc location -->
+<!ELEMENT RsStruct_protResidue (#PCDATA)>
+
+<!-- alternative residue specified by variation sequence -->
+<!ELEMENT RsStruct_rsResidue (#PCDATA)>
+
+<!-- GI of the structure neighbor -->
+<!ELEMENT RsStruct_structGi (%INTEGER;)>
+
+<!-- position of the residue for the structure GI -->
+<!ELEMENT RsStruct_structLoc (%INTEGER;)>
+
+<!-- residue specified for protein at struct-loc location -->
+<!ELEMENT RsStruct_structResidue (#PCDATA)>
+
+<!-- link data for another resource -->
+<!ELEMENT RsLinkout (
+        RsLinkout_resourceId, 
+        RsLinkout_linkValue)>
+
+<!-- BaseURLList.url_id -->
+<!ELEMENT RsLinkout_resourceId (#PCDATA)>
+
+<!-- value to append to ResourceURL.base-url for complete link -->
+<!ELEMENT RsLinkout_linkValue (#PCDATA)>
+
+
+<!ELEMENT Component (
+        Component_componentType?, 
+        Component_ctgId?, 
+        Component_accession?, 
+        Component_name?, 
+        Component_chromosome?, 
+        Component_start?, 
+        Component_end?, 
+        Component_orientation?, 
+        Component_gi?, 
+        Component_groupTerm?, 
+        Component_contigLabel?, 
+        Component_mapLoc)>
+
+<!-- type of component: chromosome, contig, gene_region, etc. -->
+<!ELEMENT Component_componentType %ENUM;>
+<!ATTLIST Component_componentType value (
+        contig |
+        mrna
+        ) #REQUIRED >
+
+
+<!-- dbSNP contig_id used to join on contig hit / mapset data to these assembly properties -->
+<!ELEMENT Component_ctgId (%INTEGER;)>
+
+<!-- Accession[.version] for the sequence component -->
+<!ELEMENT Component_accession (#PCDATA)>
+
+<!-- contig name defined as either a submitter local id, element of a whole genome assembly set, or internal NCBI local id -->
+<!ELEMENT Component_name (#PCDATA)>
+
+<!-- Organism appropriate chromosome tag, 'Un' reserved for default case of unplaced components -->
+<!ELEMENT Component_chromosome (#PCDATA)>
+
+<!-- component starting position on the chromosome (base 0 inclusive) -->
+<!ELEMENT Component_start (%INTEGER;)>
+
+<!-- component ending position on the chromosome (base 0 inclusive) -->
+<!ELEMENT Component_end (%INTEGER;)>
+
+<!-- orientation of this component to chromosome, forward (fwd) = 0, reverse (rev) = 1, unknown = NULL in ContigInfo.orient. -->
+<!ELEMENT Component_orientation %ENUM;>
+<!ATTLIST Component_orientation value (
+        fwd |
+        rev |
+        unknown
+        ) #REQUIRED >
+
+
+<!-- NCBI gi for component sequence (equivalent to accession.version) for nucleotide sequence. -->
+<!ELEMENT Component_gi (#PCDATA)>
+
+<!-- Identifier label for the genome assembly that defines the contigs in this mapset and their placement within the organism genome. -->
+<!ELEMENT Component_groupTerm (#PCDATA)>
+
+<!-- Display label for component -->
+<!ELEMENT Component_contigLabel (#PCDATA)>
+
+<!ELEMENT Component_mapLoc (MapLoc*)>
+
diff --git a/dtd/OMSSA.dtd b/dtd/OMSSA.dtd
new file mode 100644
index 0000000..4ab5adc
--- /dev/null
+++ b/dtd/OMSSA.dtd
@@ -0,0 +1,89 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "omssa.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- OMSSA.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % OMSSA_module PUBLIC "-//NCBI//OMSSA Module//EN" "OMSSA.mod.dtd">
+%OMSSA_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/OMSSA.mod.dtd b/dtd/OMSSA.mod.dtd
new file mode 100644
index 0000000..26f050e
--- /dev/null
+++ b/dtd/OMSSA.mod.dtd
@@ -0,0 +1,1361 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "omssa.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 08/02/2010 23:05:14
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "OMSSA"
+================================================= -->
+
+<!--
+ $Id: omssa.asn 192083 2010-05-19 22:28:08Z lewisg $
+**********************************************************************
+
+  OMSSA (Open Mass Spectrometry Search Algorithm) data definitions
+  Lewis Geer, 2003
+
+  make using something like
+  "datatool -m omssa.asn -oc ObjOmssa -oA -od omssa.def"
+
+  note that this file requires omssa.def
+
+**********************************************************************
+-->
+
+<!-- Elements referenced from other modules:
+          Bioseq FROM NCBI-Sequence -->
+<!-- ============================================ -->
+
+<!-- Generic holder for experimental info -->
+<!ELEMENT NameValue (
+        NameValue_name, 
+        NameValue_value)>
+
+<!ELEMENT NameValue_name (#PCDATA)>
+
+<!ELEMENT NameValue_value (#PCDATA)>
+
+<!-- Holds a single spectrum -->
+<!ELEMENT MSSpectrum (
+        MSSpectrum_number, 
+        MSSpectrum_charge, 
+        MSSpectrum_precursormz, 
+        MSSpectrum_mz, 
+        MSSpectrum_abundance, 
+        MSSpectrum_iscale, 
+        MSSpectrum_ids?, 
+        MSSpectrum_namevalue?)>
+
+<!-- unique number of spectrum -->
+<!ELEMENT MSSpectrum_number (%INTEGER;)>
+
+<!-- may be more than one if unknown -->
+<!ELEMENT MSSpectrum_charge (MSSpectrum_charge_E*)>
+
+
+<!ELEMENT MSSpectrum_charge_E (%INTEGER;)>
+
+<!-- scaled precursor m/z, scale is in MSSearchSettings -->
+<!ELEMENT MSSpectrum_precursormz (%INTEGER;)>
+
+<!-- scaled product m/z -->
+<!ELEMENT MSSpectrum_mz (MSSpectrum_mz_E*)>
+
+
+<!ELEMENT MSSpectrum_mz_E (%INTEGER;)>
+
+<!-- scaled product abundance -->
+<!ELEMENT MSSpectrum_abundance (MSSpectrum_abundance_E*)>
+
+
+<!ELEMENT MSSpectrum_abundance_E (%INTEGER;)>
+
+<!-- abundance scale, float to integer -->
+<!ELEMENT MSSpectrum_iscale (%REAL;)>
+
+<!-- ids/filenames -->
+<!ELEMENT MSSpectrum_ids (MSSpectrum_ids_E*)>
+
+
+<!ELEMENT MSSpectrum_ids_E (#PCDATA)>
+
+<!-- extra info: retention times, etc. -->
+<!ELEMENT MSSpectrum_namevalue (NameValue*)>
+
+<!-- Holds a set of spectra -->
+<!ELEMENT MSSpectrumset (MSSpectrum*)>
+
+<!-- enumerate enzymes -->
+<!ELEMENT MSEnzymes (%INTEGER;)>
+<!ATTLIST MSEnzymes value (
+        trypsin |
+        argc |
+        cnbr |
+        chymotrypsin |
+        formicacid |
+        lysc |
+        lysc-p |
+        pepsin-a |
+        tryp-cnbr |
+        tryp-chymo |
+        trypsin-p |
+        whole-protein |
+        aspn |
+        gluc |
+        aspngluc |
+        top-down |
+        semi-tryptic |
+        no-enzyme |
+        chymotrypsin-p |
+        aspn-de |
+        gluc-de |
+        lysn |
+        thermolysin-p |
+        semi-chymotrypsin |
+        semi-gluc |
+        max |
+        none
+        ) #IMPLIED >
+
+
+<!-- enumerate modifications -->
+<!ELEMENT MSMod (%INTEGER;)>
+
+<!--
+    methylk	-  methylation of K
+    oxym	-  oxidation of methionine
+    carboxymethylc	-  carboxymethyl cysteine
+    carbamidomethylc	-  carbamidomethyl cysteine
+    deamidationkq	-  deamidation of K and Q
+    propionamidec	-  propionamide cysteine
+    phosphorylations	-  phosphorylation of S
+    phosphorylationt	-  phosphorylation of T
+    phosphorylationy	-  phosphorylation of Y    
+    ntermmcleave	-  N terminal methionine cleavage
+    ntermacetyl	-  N terminal protein acetyl
+    ntermmethyl	-  N terminal protein methyl
+    ntermtrimethyl	-  N terminal protein trimethyl
+    methythiold	-  beta methythiolation of D
+    methylq	-  methylation of Q
+    trimethylk	-  trimethylation of K
+    methyld	-  methylation of D
+    methyle	-  methylation of E
+    ctermpepmethyl	-  C terminal methylation
+    trideuteromethyld	-  trideuteromethylation of D
+    trideuteromethyle	-  trideuteromethylation of E
+    ctermpeptrideuteromethyl	-  C terminal trideuteromethylation
+    usermod1	-  start of user defined mods
+    usermod10	-  end of user defined mods
+    max	-  maximum number of mods
+    unknown	-  modification of unknown type
+-->
+<!ATTLIST MSMod value (
+        methylk |
+        oxym |
+        carboxymethylc |
+        carbamidomethylc |
+        deamidationkq |
+        propionamidec |
+        phosphorylations |
+        phosphorylationt |
+        phosphorylationy |
+        ntermmcleave |
+        ntermacetyl |
+        ntermmethyl |
+        ntermtrimethyl |
+        methythiold |
+        methylq |
+        trimethylk |
+        methyld |
+        methyle |
+        ctermpepmethyl |
+        trideuteromethyld |
+        trideuteromethyle |
+        ctermpeptrideuteromethyl |
+        nformylmet |
+        twoamino3oxobutanoicacid |
+        acetylk |
+        ctermamide |
+        bmethylthiold |
+        carbamidomethylk |
+        carbamidometylh |
+        carbamidomethyld |
+        carbamidomethyle |
+        carbamylk |
+        ntermcarbamyl |
+        citrullinationr |
+        cysteicacidc |
+        diiodinationy |
+        dimethylk |
+        dimethylr |
+        ntermpepdimethyl |
+        dihydroxyf |
+        thioacetylk |
+        ntermpeptioacetyl |
+        farnesylationc |
+        formylk |
+        ntermpepformyl |
+        formylkynureninw |
+        phef |
+        gammacarboxyld |
+        gammacarboxyle |
+        geranylgeranylc |
+        ntermpepglucuronylg |
+        glutathionec |
+        glyglyk |
+        guanidinationk |
+        his2asnh |
+        his2asph |
+        ctermpephsem |
+        ctermpephselactm |
+        hydroxykynureninw |
+        hydroxylationd |
+        hydroxylationk |
+        hydroxylationn |
+        hydroxylationp |
+        hydroxylationf |
+        hydroxylationy |
+        iodinationy |
+        kynureninw |
+        lipoylk |
+        ctermpepmeester |
+        meesterd |
+        meestere |
+        meesters |
+        meestery |
+        methylc |
+        methylh |
+        methyln |
+        ntermpepmethyl |
+        methylr |
+        ntermpepmyristoyeylationg |
+        ntermpepmyristoyl4hg |
+        ntermpepmyristoylationg |
+        myristoylationk |
+        ntermformyl |
+        nemc |
+        nipcam |
+        nitrow |
+        nitroy |
+        ctermpepo18 |
+        ctermpepdio18 |
+        oxyh |
+        oxyw |
+        ppantetheines |
+        palmitoylationc |
+        palmitoylationk |
+        palmitoylations |
+        palmitoylationt |
+        phospholosss |
+        phospholosst |
+        phospholossy |
+        phosphoneutrallossc |
+        phosphoneutrallossd |
+        phosphoneutrallossh |
+        propionylk |
+        ntermpeppropionyl |
+        propionylheavyk |
+        ntermpeppropionylheavy |
+        pyridylk |
+        ntermpeppyridyl |
+        ntermpeppyrocmc |
+        ntermpeppyroe |
+        ntermpeppyroq |
+        pyroglutamicp |
+        spyridylethylc |
+        semetm |
+        sulfationy |
+        suphonem |
+        triiodinationy |
+        trimethylationr |
+        ntermpeptripalmitatec |
+        usermod1 |
+        usermod2 |
+        usermod3 |
+        usermod4 |
+        usermod5 |
+        usermod6 |
+        usermod7 |
+        usermod8 |
+        usermod9 |
+        usermod10 |
+        icatlight |
+        icatheavy |
+        camthiopropanoylk |
+        phosphoneutrallosss |
+        phosphoneutrallosst |
+        phosphoetdlosss |
+        phosphoetdlosst |
+        arg-13c6 |
+        arg-13c6-15n4 |
+        lys-13c6 |
+        oxy18 |
+        beta-elim-s |
+        beta-elim-t |
+        usermod11 |
+        usermod12 |
+        usermod13 |
+        usermod14 |
+        usermod15 |
+        usermod16 |
+        usermod17 |
+        usermod18 |
+        usermod19 |
+        usermod20 |
+        usermod21 |
+        usermod22 |
+        usermod23 |
+        usermod24 |
+        usermod25 |
+        usermod26 |
+        usermod27 |
+        usermod28 |
+        usermod29 |
+        usermod30 |
+        sulfinicacid |
+        arg2orn |
+        dehydro |
+        carboxykynurenin |
+        sumoylation |
+        iTRAQ114nterm |
+        iTRAQ114K |
+        iTRAQ114Y |
+        iTRAQ115nterm |
+        iTRAQ115K |
+        iTRAQ115Y |
+        iTRAQ116nterm |
+        iTRAQ116K |
+        iTRAQ116Y |
+        iTRAQ117nterm |
+        iTRAQ117K |
+        iTRAQ117Y |
+        mmts |
+        lys-2H4 |
+        lys-13C615N2 |
+        hexNAcN |
+        dHexHexNAcN |
+        hexNAcS |
+        hexNAcT |
+        mod186 |
+        mod187 |
+        mod188 |
+        mod189 |
+        mod190 |
+        mod191 |
+        mod192 |
+        mod193 |
+        mod194 |
+        mod195 |
+        mod196 |
+        mod197 |
+        mod198 |
+        mod199 |
+        mod200 |
+        mod201 |
+        mod202 |
+        mod203 |
+        mod204 |
+        mod205 |
+        mod206 |
+        mod207 |
+        mod208 |
+        mod209 |
+        mod210 |
+        mod211 |
+        mod212 |
+        mod213 |
+        mod214 |
+        mod215 |
+        mod216 |
+        mod217 |
+        mod218 |
+        mod219 |
+        mod220 |
+        mod221 |
+        mod222 |
+        mod223 |
+        mod224 |
+        mod225 |
+        mod226 |
+        mod227 |
+        mod228 |
+        mod229 |
+        mod230 |
+        max |
+        unknown |
+        none
+        ) #IMPLIED >
+
+
+<!-- enumerate modification types -->
+<!ELEMENT MSModType (%INTEGER;)>
+
+<!--
+    modaa	-  at particular amino acids
+    modn	-  at the N terminus of a protein
+    modnaa	-  at the N terminus of a protein at particular amino acids
+    modc	-  at the C terminus of a protein
+    modcaa	-  at the C terminus of a protein at particular amino acids
+    modnp	-  at the N terminus of a peptide
+    modnpaa	-  at the N terminus of a peptide at particular amino acids
+    modcp	-  at the C terminus of a peptide
+    modcpaa	-  at the C terminus of a peptide at particular amino acids
+    modmax	-  the max number of modification types
+-->
+<!ATTLIST MSModType value (
+        modaa |
+        modn |
+        modnaa |
+        modc |
+        modcaa |
+        modnp |
+        modnpaa |
+        modcp |
+        modcpaa |
+        modmax
+        ) #IMPLIED >
+
+
+<!-- mass container -->
+<!ELEMENT MSMassSet (
+        MSMassSet_monomass, 
+        MSMassSet_averagemass, 
+        MSMassSet_n15mass)>
+
+<!ELEMENT MSMassSet_monomass (%REAL;)>
+
+<!ELEMENT MSMassSet_averagemass (%REAL;)>
+
+<!ELEMENT MSMassSet_n15mass (%REAL;)>
+
+<!-- Modification Definition -->
+<!ELEMENT MSModSpec (
+        MSModSpec_mod, 
+        MSModSpec_type, 
+        MSModSpec_name, 
+        MSModSpec_monomass, 
+        MSModSpec_averagemass, 
+        MSModSpec_n15mass, 
+        MSModSpec_residues?, 
+        MSModSpec_neutralloss?, 
+        MSModSpec_unimod?, 
+        MSModSpec_psi-ms?)>
+
+<!-- what is the mod -->
+<!ELEMENT MSModSpec_mod (MSMod)>
+
+<!-- modification type -->
+<!ELEMENT MSModSpec_type (MSModType)>
+
+<!-- friendly name of mod -->
+<!ELEMENT MSModSpec_name (#PCDATA)>
+
+<!-- monoisotopic mass -->
+<!ELEMENT MSModSpec_monomass (%REAL;)>
+
+<!-- average mass -->
+<!ELEMENT MSModSpec_averagemass (%REAL;)>
+
+<!-- monoisotopic n15 mass -->
+<!ELEMENT MSModSpec_n15mass (%REAL;)>
+
+<!-- residues to apply mod to -->
+<!ELEMENT MSModSpec_residues (MSModSpec_residues_E*)>
+
+
+<!ELEMENT MSModSpec_residues_E (#PCDATA)>
+
+<!-- loss after precursor mass determination -->
+<!ELEMENT MSModSpec_neutralloss (MSMassSet)>
+
+<!-- the equivalent Unimod Accession number -->
+<!ELEMENT MSModSpec_unimod (%INTEGER;)>
+
+<!-- the PSI-MS equivalent name   -->
+<!ELEMENT MSModSpec_psi-ms (#PCDATA)>
+
+<!-- Holds a set of modifications -->
+<!ELEMENT MSModSpecSet (MSModSpec*)>
+
+<!--
+ How is charge to be handled?  Some input files are not clear
+ on this.  For example, a dta file only specifies one charge, 
+ even though the charge is not really known.
+-->
+<!ELEMENT MSCalcPlusOne (%INTEGER;)>
+
+<!--
+    dontcalc	-  don't guess charge one
+    calc	-  guess charge one
+-->
+<!ATTLIST MSCalcPlusOne value (
+        dontcalc |
+        calc
+        ) #IMPLIED >
+
+
+<!-- user instructions on whether to believe charges in input file -->
+<!ELEMENT MSCalcCharge (%INTEGER;)>
+
+<!--
+    calculate	-  guess the charge(s) from the data
+    usefile	-  use what the input file says
+    userange	-  use the charge range specified
+-->
+<!ATTLIST MSCalcCharge value (
+        calculate |
+        usefile |
+        userange
+        ) #IMPLIED >
+
+
+<!-- How to handle precursor charge -->
+<!ELEMENT MSChargeHandle (
+        MSChargeHandle_calcplusone?, 
+        MSChargeHandle_calccharge?, 
+        MSChargeHandle_mincharge?, 
+        MSChargeHandle_maxcharge?, 
+        MSChargeHandle_considermult?, 
+        MSChargeHandle_plusone, 
+        MSChargeHandle_maxproductcharge?, 
+        MSChargeHandle_prodlesspre?, 
+        MSChargeHandle_negative?)>
+
+<!-- do we guess charge one? -->
+<!ELEMENT MSChargeHandle_calcplusone (MSCalcPlusOne)>
+
+<!-- how do we handle charges? -->
+<!ELEMENT MSChargeHandle_calccharge (MSCalcCharge)>
+
+<!-- if userange, what is the min? -->
+<!ELEMENT MSChargeHandle_mincharge (%INTEGER;)>
+
+<!-- if userange, what is the max? -->
+<!ELEMENT MSChargeHandle_maxcharge (%INTEGER;)>
+
+<!-- at which precursor charge to consider +2 ions? -->
+<!ELEMENT MSChargeHandle_considermult (%INTEGER;)>
+
+<!-- what % of peaks below precursor needed to call as +1 -->
+<!ELEMENT MSChargeHandle_plusone (%REAL;)>
+
+<!-- maximum product ion charge -->
+<!ELEMENT MSChargeHandle_maxproductcharge (%INTEGER;)>
+
+<!-- product charge always less thanor equal to precursor? -->
+<!ELEMENT MSChargeHandle_prodlesspre EMPTY>
+<!ATTLIST MSChargeHandle_prodlesspre value ( true | false ) #REQUIRED >
+
+
+<!-- negative ion search if -1, positive ion if 1 -->
+<!ELEMENT MSChargeHandle_negative (%INTEGER;)>
+
+<!-- what type of atomic mass to use -->
+<!ELEMENT MSSearchType (%INTEGER;)>
+<!ATTLIST MSSearchType value (
+        monoisotopic |
+        average |
+        monon15 |
+        exact |
+        multiisotope |
+        max
+        ) #IMPLIED >
+
+
+<!-- what is the charge dependence of the mass tolerance? -->
+<!ELEMENT MSZdependence (%INTEGER;)>
+
+<!--
+    independent	-  mass tol. invariant with charge
+    linearwithz	-  mass tol. scales with charge
+-->
+<!ATTLIST MSZdependence value (
+        independent |
+        linearwithz |
+        max
+        ) #IMPLIED >
+
+
+<!-- Iterative search settings -->
+<!ELEMENT MSIterativeSettings (
+        MSIterativeSettings_researchthresh, 
+        MSIterativeSettings_subsetthresh, 
+        MSIterativeSettings_replacethresh)>
+
+<!-- e-val threshold for re-searching spectra, 0 = always re-search -->
+<!ELEMENT MSIterativeSettings_researchthresh (%REAL;)>
+
+<!-- e-val threshold for picking sequence subset, 0 = all sequences -->
+<!ELEMENT MSIterativeSettings_subsetthresh (%REAL;)>
+
+<!-- e-val threshold for replacing hitset, 0 = only if better -->
+<!ELEMENT MSIterativeSettings_replacethresh (%REAL;)>
+
+<!-- Library search settings -->
+<!ELEMENT MSLibrarySettings (
+        MSLibrarySettings_libnames, 
+        MSLibrarySettings_presearch, 
+        MSLibrarySettings_useomssascore, 
+        MSLibrarySettings_usereplicatescore, 
+        MSLibrarySettings_qtofscore)>
+
+<!-- names of search libraries -->
+<!ELEMENT MSLibrarySettings_libnames (MSLibrarySettings_libnames_E*)>
+
+
+<!ELEMENT MSLibrarySettings_libnames_E (#PCDATA)>
+
+<!-- should there be a restriction on precursor mass? -->
+<!ELEMENT MSLibrarySettings_presearch EMPTY>
+<!ATTLIST MSLibrarySettings_presearch value ( true | false ) #REQUIRED >
+
+
+<!-- use the omssa score? -->
+<!ELEMENT MSLibrarySettings_useomssascore EMPTY>
+<!ATTLIST MSLibrarySettings_useomssascore value ( true | false ) #REQUIRED >
+
+
+<!-- use the number of replicates score? -->
+<!ELEMENT MSLibrarySettings_usereplicatescore EMPTY>
+<!ATTLIST MSLibrarySettings_usereplicatescore value ( true | false ) #REQUIRED >
+
+
+<!-- use the qtof score? -->
+<!ELEMENT MSLibrarySettings_qtofscore EMPTY>
+<!ATTLIST MSLibrarySettings_qtofscore value ( true | false ) #REQUIRED >
+
+
+<!-- Generic search settings -->
+<!ELEMENT MSSearchSettings (
+        MSSearchSettings_precursorsearchtype, 
+        MSSearchSettings_productsearchtype, 
+        MSSearchSettings_ionstosearch, 
+        MSSearchSettings_peptol, 
+        MSSearchSettings_msmstol, 
+        MSSearchSettings_zdep, 
+        MSSearchSettings_cutoff, 
+        MSSearchSettings_cutlo, 
+        MSSearchSettings_cuthi, 
+        MSSearchSettings_cutinc, 
+        MSSearchSettings_singlewin, 
+        MSSearchSettings_doublewin, 
+        MSSearchSettings_singlenum, 
+        MSSearchSettings_doublenum, 
+        MSSearchSettings_fixed, 
+        MSSearchSettings_variable, 
+        MSSearchSettings_enzyme, 
+        MSSearchSettings_missedcleave, 
+        MSSearchSettings_hitlistlen?, 
+        MSSearchSettings_db, 
+        MSSearchSettings_tophitnum, 
+        MSSearchSettings_minhit?, 
+        MSSearchSettings_minspectra?, 
+        MSSearchSettings_scale?, 
+        MSSearchSettings_maxmods?, 
+        MSSearchSettings_taxids?, 
+        MSSearchSettings_chargehandling?, 
+        MSSearchSettings_usermods?, 
+        MSSearchSettings_pseudocount?, 
+        MSSearchSettings_searchb1?, 
+        MSSearchSettings_searchctermproduct?, 
+        MSSearchSettings_maxproductions?, 
+        MSSearchSettings_minnoenzyme?, 
+        MSSearchSettings_maxnoenzyme?, 
+        MSSearchSettings_exactmass?, 
+        MSSearchSettings_settingid?, 
+        MSSearchSettings_iterativesettings?, 
+        MSSearchSettings_precursorcull?, 
+        MSSearchSettings_infiles?, 
+        MSSearchSettings_outfiles?, 
+        MSSearchSettings_nocorrelationscore?, 
+        MSSearchSettings_probfollowingion?, 
+        MSSearchSettings_nmethionine?, 
+        MSSearchSettings_automassadjust?, 
+        MSSearchSettings_lomasscutoff?, 
+        MSSearchSettings_libsearchsettings?, 
+        MSSearchSettings_noprolineions?, 
+        MSSearchSettings_reversesearch?, 
+        MSSearchSettings_othersettings?, 
+        MSSearchSettings_numisotopes?, 
+        MSSearchSettings_pepppm?, 
+        MSSearchSettings_msmsppm?, 
+        MSSearchSettings_reportedhitcount?)>
+
+<!-- average or monoisotopic? -->
+<!ELEMENT MSSearchSettings_precursorsearchtype (MSSearchType)>
+
+<!-- average or monoisotopic? -->
+<!ELEMENT MSSearchSettings_productsearchtype (MSSearchType)>
+
+<!-- which ions to search? -->
+<!ELEMENT MSSearchSettings_ionstosearch (MSIonType*)>
+
+<!-- peptide mass tolerance -->
+<!ELEMENT MSSearchSettings_peptol (%REAL;)>
+
+<!-- msms mass tolerance -->
+<!ELEMENT MSSearchSettings_msmstol (%REAL;)>
+
+<!-- what is the charge dependence of the mass tolerance? -->
+<!ELEMENT MSSearchSettings_zdep (MSZdependence)>
+
+<!--
+ evalue cutoff
+ next 3 fields define intensity fraction below
+ which peaks will be discard
+-->
+<!ELEMENT MSSearchSettings_cutoff (%REAL;)>
+
+<!-- the start of the cutoff, fraction of most intense peak -->
+<!ELEMENT MSSearchSettings_cutlo (%REAL;)>
+
+<!-- the end of the cutoff -->
+<!ELEMENT MSSearchSettings_cuthi (%REAL;)>
+
+<!-- the increment of the cutoff -->
+<!ELEMENT MSSearchSettings_cutinc (%REAL;)>
+
+<!-- the size of the single charge filtering window -->
+<!ELEMENT MSSearchSettings_singlewin (%INTEGER;)>
+
+<!-- the size of the double charge filtering window -->
+<!ELEMENT MSSearchSettings_doublewin (%INTEGER;)>
+
+<!-- the number of peaks allowed in the single window -->
+<!ELEMENT MSSearchSettings_singlenum (%INTEGER;)>
+
+<!-- the number of peaks allowed in the double window -->
+<!ELEMENT MSSearchSettings_doublenum (%INTEGER;)>
+
+<!-- fixed PTM's -->
+<!ELEMENT MSSearchSettings_fixed (MSMod*)>
+
+<!-- variable PTM's -->
+<!ELEMENT MSSearchSettings_variable (MSMod*)>
+
+<!-- digestion enzyme -->
+<!ELEMENT MSSearchSettings_enzyme (MSEnzymes)>
+
+<!-- number of missed cleaves allowed -->
+<!ELEMENT MSSearchSettings_missedcleave (%INTEGER;)>
+
+<!--
+ the number of hits kept in memory
+ for a spectrum
+-->
+<!ELEMENT MSSearchSettings_hitlistlen (%INTEGER;)>
+
+<!-- sequence set to search, e.g. "nr" -->
+<!ELEMENT MSSearchSettings_db (#PCDATA)>
+
+<!-- number of m/z to consider in first pass -->
+<!ELEMENT MSSearchSettings_tophitnum (%INTEGER;)>
+
+<!-- minimum number of m/z values for a valid hit -->
+<!ELEMENT MSSearchSettings_minhit (%INTEGER;)>
+
+<!-- minimum number of m/z for a valid spectra -->
+<!ELEMENT MSSearchSettings_minspectra (%INTEGER;)>
+
+<!-- scale for m/z float to integer -->
+<!ELEMENT MSSearchSettings_scale (%INTEGER;)>
+
+<!--
+ maximum number of mass ladders per
+ database peptide
+-->
+<!ELEMENT MSSearchSettings_maxmods (%INTEGER;)>
+
+<!-- taxa to limit search -->
+<!ELEMENT MSSearchSettings_taxids (MSSearchSettings_taxids_E*)>
+
+
+<!ELEMENT MSSearchSettings_taxids_E (%INTEGER;)>
+
+<!-- how to deal with charges -->
+<!ELEMENT MSSearchSettings_chargehandling (MSChargeHandle)>
+
+<!-- user defined modifications -->
+<!ELEMENT MSSearchSettings_usermods (MSModSpecSet)>
+
+<!-- min number of counts per precursor bin -->
+<!ELEMENT MSSearchSettings_pseudocount (%INTEGER;)>
+
+<!-- should b1 product be in search (1=no, 0=yes) -->
+<!ELEMENT MSSearchSettings_searchb1 (%INTEGER;)>
+
+<!-- should c terminus ion be searched (1=no, 0=yes) -->
+<!ELEMENT MSSearchSettings_searchctermproduct (%INTEGER;)>
+
+<!-- max number of ions in each series (0=all) -->
+<!ELEMENT MSSearchSettings_maxproductions (%INTEGER;)>
+
+<!-- min number of AA in peptide for noenzyme search -->
+<!ELEMENT MSSearchSettings_minnoenzyme (%INTEGER;)>
+
+<!-- max number of AA in peptide for noenzyme search (0=none) -->
+<!ELEMENT MSSearchSettings_maxnoenzyme (%INTEGER;)>
+
+<!-- the threshold in Da for adding neutron -->
+<!ELEMENT MSSearchSettings_exactmass (%REAL;)>
+
+<!-- id of the search settings -->
+<!ELEMENT MSSearchSettings_settingid (%INTEGER;)>
+
+<!-- iterative search settings -->
+<!ELEMENT MSSearchSettings_iterativesettings (MSIterativeSettings)>
+
+<!-- turn on aggressive precursor culling for ETD (0=none) -->
+<!ELEMENT MSSearchSettings_precursorcull (%INTEGER;)>
+
+<!-- input files -->
+<!ELEMENT MSSearchSettings_infiles (MSInFile*)>
+
+<!-- output files -->
+<!ELEMENT MSSearchSettings_outfiles (MSOutFile*)>
+
+<!-- turn on correlation score (1=nocorr) -->
+<!ELEMENT MSSearchSettings_nocorrelationscore (%INTEGER;)>
+
+<!-- probability of a consecutive ion (used in correlation) -->
+<!ELEMENT MSSearchSettings_probfollowingion (%REAL;)>
+
+<!-- should nmethionine be cleaved? -->
+<!ELEMENT MSSearchSettings_nmethionine EMPTY>
+<!ATTLIST MSSearchSettings_nmethionine value ( true | false ) #REQUIRED >
+
+
+<!-- fraction allowable adjustment of product mass tolerance -->
+<!ELEMENT MSSearchSettings_automassadjust (%REAL;)>
+
+<!-- low mass filter in Daltons, unscaled -->
+<!ELEMENT MSSearchSettings_lomasscutoff (%REAL;)>
+
+<!-- library search settings -->
+<!ELEMENT MSSearchSettings_libsearchsettings (MSLibrarySettings)>
+
+<!-- which ions to use no proline rule -->
+<!ELEMENT MSSearchSettings_noprolineions (MSIonType*)>
+
+<!-- do reverse search -->
+<!ELEMENT MSSearchSettings_reversesearch EMPTY>
+<!ATTLIST MSSearchSettings_reversesearch value ( true | false ) #REQUIRED >
+
+
+<!-- extra search settings -->
+<!ELEMENT MSSearchSettings_othersettings (NameValue*)>
+
+<!-- number of isotopic peaks to search when using MSSearchType multiisotope -->
+<!ELEMENT MSSearchSettings_numisotopes (%INTEGER;)>
+
+<!-- search precursor as ppm -->
+<!ELEMENT MSSearchSettings_pepppm EMPTY>
+<!ATTLIST MSSearchSettings_pepppm value ( true | false ) #REQUIRED >
+
+
+<!-- search product as ppm -->
+<!ELEMENT MSSearchSettings_msmsppm EMPTY>
+<!ATTLIST MSSearchSettings_msmsppm value ( true | false ) #REQUIRED >
+
+
+<!-- the maximum number of hits to report per spectrum, 0=all -->
+<!ELEMENT MSSearchSettings_reportedhitcount (%INTEGER;)>
+
+
+<!ELEMENT MSSerialDataFormat (%INTEGER;)>
+
+<!--
+    asntext	-  open ASN.1 text format
+    asnbinary	-  open ASN.1 binary format
+    xml	-  open XML format
+    csv	-  csv (excel)
+    pepxml	-  pepXML format
+    xmlbz2	-  bzip2 XML format
+-->
+<!ATTLIST MSSerialDataFormat value (
+        none |
+        asntext |
+        asnbinary |
+        xml |
+        csv |
+        pepxml |
+        xmlbz2
+        ) #IMPLIED >
+
+
+
+<!ELEMENT MSOutFile (
+        MSOutFile_outfile, 
+        MSOutFile_outfiletype, 
+        MSOutFile_includerequest)>
+
+<!-- output file name -->
+<!ELEMENT MSOutFile_outfile (#PCDATA)>
+
+<!-- output file type -->
+<!ELEMENT MSOutFile_outfiletype (MSSerialDataFormat)>
+
+<!-- should the output include the request? -->
+<!ELEMENT MSOutFile_includerequest EMPTY>
+<!ATTLIST MSOutFile_includerequest value ( true | false ) #REQUIRED >
+
+
+
+<!ELEMENT MSSpectrumFileType (%INTEGER;)>
+
+<!--
+    oms	-  asn.1 binary for iterative search
+    omx	-  xml for iterative search
+    xml	-  xml MSRequest
+    omxbz2	-  bzip2 omx file
+-->
+<!ATTLIST MSSpectrumFileType value (
+        dta |
+        dtablank |
+        dtaxml |
+        asc |
+        pkl |
+        pks |
+        sciex |
+        mgf |
+        unknown |
+        oms |
+        omx |
+        xml |
+        omxbz2
+        ) #IMPLIED >
+
+
+
+<!ELEMENT MSInFile (
+        MSInFile_infile, 
+        MSInFile_infiletype)>
+
+<!-- input file name -->
+<!ELEMENT MSInFile_infile (#PCDATA)>
+
+<!-- input file type -->
+<!ELEMENT MSInFile_infiletype (MSSpectrumFileType)>
+
+
+<!ELEMENT MSSearchSettingsSet (MSSearchSettings*)>
+
+<!-- The search request that is given to the OMSSA algorithm -->
+<!ELEMENT MSRequest (
+        MSRequest_spectra, 
+        MSRequest_settings, 
+        MSRequest_rid?, 
+        MSRequest_moresettings?, 
+        MSRequest_modset?)>
+
+<!-- the set of spectra -->
+<!ELEMENT MSRequest_spectra (MSSpectrumset)>
+
+<!-- the search settings -->
+<!ELEMENT MSRequest_settings (MSSearchSettings)>
+
+<!-- request id -->
+<!ELEMENT MSRequest_rid (#PCDATA)>
+
+<!-- additional search runs -->
+<!ELEMENT MSRequest_moresettings (MSSearchSettingsSet)>
+
+<!-- list of mods that can be used in search -->
+<!ELEMENT MSRequest_modset (MSModSpecSet)>
+
+<!-- enumeration of ion types -->
+<!ELEMENT MSIonType (%INTEGER;)>
+
+<!--
+    z	-  actually zdot
+-->
+<!ATTLIST MSIonType value (
+        a |
+        b |
+        c |
+        x |
+        y |
+        z |
+        parent |
+        internal |
+        immonium |
+        unknown |
+        adot |
+        x-CO2 |
+        adot-CO2 |
+        max
+        ) #IMPLIED >
+
+
+<!-- types of neutral loss -->
+<!ELEMENT MSIonNeutralLoss (%INTEGER;)>
+
+<!--
+    water	-  minus 18 Da
+    ammonia	-  minus 17 Da
+-->
+<!ATTLIST MSIonNeutralLoss value (
+        water |
+        ammonia
+        ) #IMPLIED >
+
+
+<!-- iosotopic type of ion -->
+<!ELEMENT MSIonIsotopicType (%INTEGER;)>
+
+<!--
+    monoisotopic	-  no c13s in molecule
+    c13	-  one c13 in molecule
+    c13two	-  two c13s in molecule, and so on...
+-->
+<!ATTLIST MSIonIsotopicType value (
+        monoisotopic |
+        c13 |
+        c13two |
+        c13three |
+        c13four
+        ) #IMPLIED >
+
+
+<!-- type of immonium ion -->
+<!ELEMENT MSImmonium (
+        MSImmonium_parent, 
+        MSImmonium_product?)>
+
+<!-- parent amino acid -->
+<!ELEMENT MSImmonium_parent (#PCDATA)>
+
+<!-- product ion code -->
+<!ELEMENT MSImmonium_product (#PCDATA)>
+
+<!-- ion type at a finer level than ion series -->
+<!ELEMENT MSIon (
+        MSIon_neutralloss?, 
+        MSIon_isotope?, 
+        MSIon_internal?, 
+        MSIon_immonium?)>
+
+<!-- is this peak a neutral loss? -->
+<!ELEMENT MSIon_neutralloss (MSIonNeutralLoss)>
+
+<!-- isotopic composition of peak -->
+<!ELEMENT MSIon_isotope (MSIonIsotopicType)>
+
+<!-- if iontype is internal, this is the internal sequence -->
+<!ELEMENT MSIon_internal (#PCDATA)>
+
+<!-- if iontype is immonium, show characteristics -->
+<!ELEMENT MSIon_immonium (MSImmonium)>
+
+<!-- annotated comments about the ion -->
+<!ELEMENT MSIonAnnot (
+        MSIonAnnot_suspect?, 
+        MSIonAnnot_massdiff?, 
+        MSIonAnnot_missingisotope?)>
+
+<!-- is this peak suspect? -->
+<!ELEMENT MSIonAnnot_suspect EMPTY>
+<!ATTLIST MSIonAnnot_suspect value ( true | false ) #REQUIRED >
+
+
+<!-- what is the difference in mass from library spectrum? -->
+<!ELEMENT MSIonAnnot_massdiff (%REAL;)>
+
+<!-- are the lower mass peaks missing? -->
+<!ELEMENT MSIonAnnot_missingisotope EMPTY>
+<!ATTLIST MSIonAnnot_missingisotope value ( true | false ) #REQUIRED >
+
+
+<!-- defines a particular ion -->
+<!ELEMENT MSMZHit (
+        MSMZHit_ion, 
+        MSMZHit_charge, 
+        MSMZHit_number, 
+        MSMZHit_mz, 
+        MSMZHit_index?, 
+        MSMZHit_moreion?, 
+        MSMZHit_annotation?)>
+
+<!-- ion type, e.g. b -->
+<!ELEMENT MSMZHit_ion (MSIonType)>
+
+<!-- ion charge -->
+<!ELEMENT MSMZHit_charge (%INTEGER;)>
+
+<!-- the sequential number of the ion -->
+<!ELEMENT MSMZHit_number (%INTEGER;)>
+
+<!-- scaled m/z value in Da -->
+<!ELEMENT MSMZHit_mz (%INTEGER;)>
+
+<!-- the index of the peak in the original spectrum -->
+<!ELEMENT MSMZHit_index (%INTEGER;)>
+
+<!-- more information about the ion type -->
+<!ELEMENT MSMZHit_moreion (MSIon)>
+
+<!-- annotations on the ion -->
+<!ELEMENT MSMZHit_annotation (MSIonAnnot)>
+
+<!--
+ contains information about sequences with identical peptide
+ sequences
+-->
+<!ELEMENT MSPepHit (
+        MSPepHit_start, 
+        MSPepHit_stop, 
+        MSPepHit_gi?, 
+        MSPepHit_accession?, 
+        MSPepHit_defline?, 
+        MSPepHit_protlength?, 
+        MSPepHit_oid?, 
+        MSPepHit_reversed?, 
+        MSPepHit_pepstart?, 
+        MSPepHit_pepstop?)>
+
+<!-- start position (inclusive) in sequence -->
+<!ELEMENT MSPepHit_start (%INTEGER;)>
+
+<!-- stop position (inclusive) in sequence -->
+<!ELEMENT MSPepHit_stop (%INTEGER;)>
+
+<!-- genbank identifier -->
+<!ELEMENT MSPepHit_gi (%INTEGER;)>
+
+<!-- sequence accession -->
+<!ELEMENT MSPepHit_accession (#PCDATA)>
+
+<!-- sequence description -->
+<!ELEMENT MSPepHit_defline (#PCDATA)>
+
+<!-- length of protein -->
+<!ELEMENT MSPepHit_protlength (%INTEGER;)>
+
+<!-- blast library oid  -->
+<!ELEMENT MSPepHit_oid (%INTEGER;)>
+
+<!-- reversed sequence -->
+<!ELEMENT MSPepHit_reversed EMPTY>
+<!ATTLIST MSPepHit_reversed value ( true | false ) #REQUIRED >
+
+
+<!-- AA before the peptide -->
+<!ELEMENT MSPepHit_pepstart (#PCDATA)>
+
+<!-- AA after the peptide -->
+<!ELEMENT MSPepHit_pepstop (#PCDATA)>
+
+<!-- modifications to a hit peptide -->
+<!ELEMENT MSModHit (
+        MSModHit_site, 
+        MSModHit_modtype)>
+
+<!-- the position in the peptide -->
+<!ELEMENT MSModHit_site (%INTEGER;)>
+
+<!-- the type of modification -->
+<!ELEMENT MSModHit_modtype (MSMod)>
+
+<!-- sets of scores -->
+<!ELEMENT MSScoreSet (
+        MSScoreSet_name, 
+        MSScoreSet_value)>
+
+<!ELEMENT MSScoreSet_name (#PCDATA)>
+
+<!ELEMENT MSScoreSet_value (%REAL;)>
+
+<!-- hits to a given spectrum -->
+<!ELEMENT MSHits (
+        MSHits_evalue, 
+        MSHits_pvalue, 
+        MSHits_charge, 
+        MSHits_pephits, 
+        MSHits_mzhits?, 
+        MSHits_pepstring?, 
+        MSHits_mass?, 
+        MSHits_mods?, 
+        MSHits_pepstart?, 
+        MSHits_pepstop?, 
+        MSHits_protlength?, 
+        MSHits_theomass?, 
+        MSHits_oid?, 
+        MSHits_scores?, 
+        MSHits_libaccession?)>
+
+<!-- E-value (expect value) -->
+<!ELEMENT MSHits_evalue (%REAL;)>
+
+<!-- P-value (probability value) -->
+<!ELEMENT MSHits_pvalue (%REAL;)>
+
+<!-- the charge state used in search.  -1 == not +1 -->
+<!ELEMENT MSHits_charge (%INTEGER;)>
+
+<!-- peptides that match this hit -->
+<!ELEMENT MSHits_pephits (MSPepHit*)>
+
+<!-- ions hit -->
+<!ELEMENT MSHits_mzhits (MSMZHit*)>
+
+<!-- the peptide sequence -->
+<!ELEMENT MSHits_pepstring (#PCDATA)>
+
+<!-- scaled experimental mass of peptide in Da -->
+<!ELEMENT MSHits_mass (%INTEGER;)>
+
+<!-- modifications to sequence -->
+<!ELEMENT MSHits_mods (MSModHit*)>
+
+<!-- AA before the peptide (depricated) -->
+<!ELEMENT MSHits_pepstart (#PCDATA)>
+
+<!-- AA after the peptide (depricated) -->
+<!ELEMENT MSHits_pepstop (#PCDATA)>
+
+<!-- length of protein hit (depricated) -->
+<!ELEMENT MSHits_protlength (%INTEGER;)>
+
+<!-- scaled theoretical mass of peptide hit -->
+<!ELEMENT MSHits_theomass (%INTEGER;)>
+
+<!-- blast library oid (depricated)  -->
+<!ELEMENT MSHits_oid (%INTEGER;)>
+
+<!-- optional scores (for library search) -->
+<!ELEMENT MSHits_scores (MSScoreSet*)>
+
+<!-- library search accesssion -->
+<!ELEMENT MSHits_libaccession (#PCDATA)>
+
+<!-- error return for a particular spectrum's hitset -->
+<!ELEMENT MSHitError (%INTEGER;)>
+
+<!--
+    unable2read	-  can't read the spectrum
+    notenuffpeaks	-  not enough peaks to search
+-->
+<!ATTLIST MSHitError value (
+        none |
+        generalerr |
+        unable2read |
+        notenuffpeaks
+        ) #IMPLIED >
+
+
+<!-- MSHitSet annotation by end user -->
+<!ELEMENT MSUserAnnot (%INTEGER;)>
+<!ATTLIST MSUserAnnot value (
+        none |
+        delete |
+        flag
+        ) #IMPLIED >
+
+
+<!-- contains a set of hits to a single spectrum -->
+<!ELEMENT MSHitSet (
+        MSHitSet_number, 
+        MSHitSet_error?, 
+        MSHitSet_hits?, 
+        MSHitSet_ids?, 
+        MSHitSet_namevalue?, 
+        MSHitSet_settingid?, 
+        MSHitSet_userannotation?)>
+
+<!-- unique number of spectrum -->
+<!ELEMENT MSHitSet_number (%INTEGER;)>
+
+<!-- error, if any -->
+<!ELEMENT MSHitSet_error (MSHitError)>
+
+<!-- set of hit to spectrum -->
+<!ELEMENT MSHitSet_hits (MSHits*)>
+
+<!-- filenames or other ids of spectra searched -->
+<!ELEMENT MSHitSet_ids (MSHitSet_ids_E*)>
+
+
+<!ELEMENT MSHitSet_ids_E (#PCDATA)>
+
+<!-- extra info: retention times, etc. -->
+<!ELEMENT MSHitSet_namevalue (NameValue*)>
+
+<!-- id of the search setting used -->
+<!ELEMENT MSHitSet_settingid (%INTEGER;)>
+
+<!-- allows users to flag certain -->
+<!ELEMENT MSHitSet_userannotation (MSUserAnnot)>
+
+<!-- error return for the entire response -->
+<!ELEMENT MSResponseError (%INTEGER;)>
+
+<!--
+    noblastdb	-  unable to open blast library
+    noinput	-  input missing
+-->
+<!ATTLIST MSResponseError value (
+        none |
+        generalerr |
+        noblastdb |
+        noinput
+        ) #IMPLIED >
+
+
+<!-- bioseq container -->
+<!ELEMENT MSBioseq (
+        MSBioseq_oid, 
+        MSBioseq_seq)>
+
+<!-- blast library oid -->
+<!ELEMENT MSBioseq_oid (%INTEGER;)>
+
+<!ELEMENT MSBioseq_seq (Bioseq)>
+
+
+<!ELEMENT MSBioseqSet (MSBioseq*)>
+
+<!-- search results -->
+<!ELEMENT MSResponse (
+        MSResponse_hitsets, 
+        MSResponse_scale?, 
+        MSResponse_rid?, 
+        MSResponse_error?, 
+        MSResponse_version?, 
+        MSResponse_email?, 
+        MSResponse_dbversion?, 
+        MSResponse_bioseqs?)>
+
+<!-- hits grouped by spectrum -->
+<!ELEMENT MSResponse_hitsets (MSHitSet*)>
+
+<!-- scale to change m/z float to integer -->
+<!ELEMENT MSResponse_scale (%INTEGER;)>
+
+<!-- request id -->
+<!ELEMENT MSResponse_rid (#PCDATA)>
+
+<!-- error response -->
+<!ELEMENT MSResponse_error (MSResponseError)>
+
+<!-- version of OMSSA -->
+<!ELEMENT MSResponse_version (#PCDATA)>
+
+<!-- email address for notification -->
+<!ELEMENT MSResponse_email (#PCDATA)>
+
+<!-- version of db searched (usually size) -->
+<!ELEMENT MSResponse_dbversion (%INTEGER;)>
+
+<!-- sequences found in search      -->
+<!ELEMENT MSResponse_bioseqs (MSBioseqSet)>
+
+<!-- holds both search requests and responses -->
+<!ELEMENT MSSearch (
+        MSSearch_request?, 
+        MSSearch_response?)>
+
+<!ELEMENT MSSearch_request (MSRequest*)>
+
+<!ELEMENT MSSearch_response (MSResponse*)>
+
diff --git a/dtd/PDB_General.dtd b/dtd/PDB_General.dtd
new file mode 100644
index 0000000..cb2b663
--- /dev/null
+++ b/dtd/PDB_General.dtd
@@ -0,0 +1,20 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- PDB_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
diff --git a/dtd/PDB_General.mod.dtd b/dtd/PDB_General.mod.dtd
new file mode 100644
index 0000000..1e5aae9
--- /dev/null
+++ b/dtd/PDB_General.mod.dtd
@@ -0,0 +1,70 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "PDB-General"
+================================================= -->
+
+<!--
+*********************************************************************
+
+  PDB specific data
+  This block of specifications was developed by Jim Ostell and
+      Steve Bryant of NCBI
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          PDB-block -->
+
+<!-- Elements referenced from other modules:
+          Date FROM NCBI-General -->
+<!-- ============================================ -->
+
+<!-- PDB specific descriptions -->
+<!ELEMENT PDB-block (
+        PDB-block_deposition, 
+        PDB-block_class, 
+        PDB-block_compound, 
+        PDB-block_source, 
+        PDB-block_exp-method?, 
+        PDB-block_replace?)>
+
+<!-- deposition date  month,year -->
+<!ELEMENT PDB-block_deposition (Date)>
+
+<!ELEMENT PDB-block_class (#PCDATA)>
+
+<!ELEMENT PDB-block_compound (PDB-block_compound_E*)>
+
+
+<!ELEMENT PDB-block_compound_E (#PCDATA)>
+
+<!ELEMENT PDB-block_source (PDB-block_source_E*)>
+
+
+<!ELEMENT PDB-block_source_E (#PCDATA)>
+
+<!-- present if NOT X-ray diffraction -->
+<!ELEMENT PDB-block_exp-method (#PCDATA)>
+
+<!-- replacement history -->
+<!ELEMENT PDB-block_replace (PDB-replace)>
+
+
+<!ELEMENT PDB-replace (
+        PDB-replace_date, 
+        PDB-replace_ids)>
+
+<!ELEMENT PDB-replace_date (Date)>
+
+<!-- entry ids replace by this one -->
+<!ELEMENT PDB-replace_ids (PDB-replace_ids_E*)>
+
+
+<!ELEMENT PDB-replace_ids_E (#PCDATA)>
+
diff --git a/dtd/PIR_General.dtd b/dtd/PIR_General.dtd
new file mode 100644
index 0000000..15f7879
--- /dev/null
+++ b/dtd/PIR_General.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- PIR_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/PIR_General.mod.dtd b/dtd/PIR_General.mod.dtd
new file mode 100644
index 0000000..bedc2ed
--- /dev/null
+++ b/dtd/PIR_General.mod.dtd
@@ -0,0 +1,78 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "PIR-General"
+================================================= -->
+
+<!--
+*********************************************************************
+
+  PIR specific data
+  This block of specifications was developed by Jim Ostell of
+      NCBI
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          PIR-block -->
+
+<!-- Elements referenced from other modules:
+          Seq-id FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+<!-- PIR specific descriptions -->
+<!ELEMENT PIR-block (
+        PIR-block_had-punct?, 
+        PIR-block_host?, 
+        PIR-block_source?, 
+        PIR-block_summary?, 
+        PIR-block_genetic?, 
+        PIR-block_includes?, 
+        PIR-block_placement?, 
+        PIR-block_superfamily?, 
+        PIR-block_keywords?, 
+        PIR-block_cross-reference?, 
+        PIR-block_date?, 
+        PIR-block_seq-raw?, 
+        PIR-block_seqref?)>
+
+<!-- had punctuation in sequence ? -->
+<!ELEMENT PIR-block_had-punct EMPTY>
+<!ATTLIST PIR-block_had-punct value ( true | false ) #REQUIRED >
+
+
+<!ELEMENT PIR-block_host (#PCDATA)>
+
+<!-- source line -->
+<!ELEMENT PIR-block_source (#PCDATA)>
+
+<!ELEMENT PIR-block_summary (#PCDATA)>
+
+<!ELEMENT PIR-block_genetic (#PCDATA)>
+
+<!ELEMENT PIR-block_includes (#PCDATA)>
+
+<!ELEMENT PIR-block_placement (#PCDATA)>
+
+<!ELEMENT PIR-block_superfamily (#PCDATA)>
+
+<!ELEMENT PIR-block_keywords (PIR-block_keywords_E*)>
+
+
+<!ELEMENT PIR-block_keywords_E (#PCDATA)>
+
+<!ELEMENT PIR-block_cross-reference (#PCDATA)>
+
+<!ELEMENT PIR-block_date (#PCDATA)>
+
+<!-- seq with punctuation -->
+<!ELEMENT PIR-block_seq-raw (#PCDATA)>
+
+<!-- xref to other sequences -->
+<!ELEMENT PIR-block_seqref (Seq-id*)>
+
diff --git a/dtd/PRF_General.dtd b/dtd/PRF_General.dtd
new file mode 100644
index 0000000..b6cf457
--- /dev/null
+++ b/dtd/PRF_General.dtd
@@ -0,0 +1,17 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.5.0
+     ::DATATOOL:: on 06/06/2006 23:03:48
+     ============================================ -->
+
+<!-- PRF_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
diff --git a/dtd/PRF_General.mod.dtd b/dtd/PRF_General.mod.dtd
new file mode 100644
index 0000000..e09cc60
--- /dev/null
+++ b/dtd/PRF_General.mod.dtd
@@ -0,0 +1,56 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.8.1
+     ::DATATOOL:: on 01/18/2007 23:07:18
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "PRF-General"
+================================================= -->
+
+<!--
+**********************************************************************
+ PRF specific definition
+    PRF is a protein sequence database crated and maintained by
+    Protein Research Foundation, Minoo-city, Osaka, Japan.
+
+    Written by A.Ogiwara, Inst.Chem.Res. (Dr.Kanehisa's Lab),
+            Kyoto Univ., Japan
+
+**********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          PRF-block -->
+<!-- ============================================ -->
+
+
+<!ELEMENT PRF-block (
+        PRF-block_extra-src?, 
+        PRF-block_keywords?)>
+
+<!ELEMENT PRF-block_extra-src (PRF-ExtraSrc)>
+
+<!ELEMENT PRF-block_keywords (PRF-block_keywords_E*)>
+
+
+<!ELEMENT PRF-block_keywords_E (#PCDATA)>
+
+
+<!ELEMENT PRF-ExtraSrc (
+        PRF-ExtraSrc_host?, 
+        PRF-ExtraSrc_part?, 
+        PRF-ExtraSrc_state?, 
+        PRF-ExtraSrc_strain?, 
+        PRF-ExtraSrc_taxon?)>
+
+<!ELEMENT PRF-ExtraSrc_host (#PCDATA)>
+
+<!ELEMENT PRF-ExtraSrc_part (#PCDATA)>
+
+<!ELEMENT PRF-ExtraSrc_state (#PCDATA)>
+
+<!ELEMENT PRF-ExtraSrc_strain (#PCDATA)>
+
+<!ELEMENT PRF-ExtraSrc_taxon (#PCDATA)>
+
diff --git a/dtd/SP_General.dtd b/dtd/SP_General.dtd
new file mode 100644
index 0000000..8a981ec
--- /dev/null
+++ b/dtd/SP_General.dtd
@@ -0,0 +1,86 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 2.0.0
+     ::DATATOOL:: on 04/26/2010 23:04:43
+     ============================================ -->
+
+<!-- SP_General.dtd
+  This file is built from a series of basic modules.
+  The actual ELEMENT and ENTITY declarations are in the modules.
+  This file is used to put them together.
+-->
+
+<!ENTITY % NCBI_Entity_module PUBLIC "-//NCBI//NCBI Entity Module//EN" "NCBI_Entity.mod.dtd">
+%NCBI_Entity_module;
+
+<!ENTITY % EMBL_General_module PUBLIC "-//NCBI//EMBL General Module//EN" "EMBL_General.mod.dtd">
+%EMBL_General_module;
+
+<!ENTITY % GenBank_General_module PUBLIC "-//NCBI//GenBank General Module//EN" "GenBank_General.mod.dtd">
+%GenBank_General_module;
+
+<!ENTITY % NCBI_Biblio_module PUBLIC "-//NCBI//NCBI Biblio Module//EN" "NCBI_Biblio.mod.dtd">
+%NCBI_Biblio_module;
+
+<!ENTITY % NCBI_BioSource_module PUBLIC "-//NCBI//NCBI BioSource Module//EN" "NCBI_BioSource.mod.dtd">
+%NCBI_BioSource_module;
+
+<!ENTITY % NCBI_Gene_module PUBLIC "-//NCBI//NCBI Gene Module//EN" "NCBI_Gene.mod.dtd">
+%NCBI_Gene_module;
+
+<!ENTITY % NCBI_General_module PUBLIC "-//NCBI//NCBI General Module//EN" "NCBI_General.mod.dtd">
+%NCBI_General_module;
+
+<!ENTITY % NCBI_Medline_module PUBLIC "-//NCBI//NCBI Medline Module//EN" "NCBI_Medline.mod.dtd">
+%NCBI_Medline_module;
+
+<!ENTITY % NCBI_Organism_module PUBLIC "-//NCBI//NCBI Organism Module//EN" "NCBI_Organism.mod.dtd">
+%NCBI_Organism_module;
+
+<!ENTITY % NCBI_Protein_module PUBLIC "-//NCBI//NCBI Protein Module//EN" "NCBI_Protein.mod.dtd">
+%NCBI_Protein_module;
+
+<!ENTITY % NCBI_Pub_module PUBLIC "-//NCBI//NCBI Pub Module//EN" "NCBI_Pub.mod.dtd">
+%NCBI_Pub_module;
+
+<!ENTITY % NCBI_RNA_module PUBLIC "-//NCBI//NCBI RNA Module//EN" "NCBI_RNA.mod.dtd">
+%NCBI_RNA_module;
+
+<!ENTITY % NCBI_Rsite_module PUBLIC "-//NCBI//NCBI Rsite Module//EN" "NCBI_Rsite.mod.dtd">
+%NCBI_Rsite_module;
+
+<!ENTITY % NCBI_SeqTable_module PUBLIC "-//NCBI//NCBI SeqTable Module//EN" "NCBI_SeqTable.mod.dtd">
+%NCBI_SeqTable_module;
+
+<!ENTITY % NCBI_Seqalign_module PUBLIC "-//NCBI//NCBI Seqalign Module//EN" "NCBI_Seqalign.mod.dtd">
+%NCBI_Seqalign_module;
+
+<!ENTITY % NCBI_Seqfeat_module PUBLIC "-//NCBI//NCBI Seqfeat Module//EN" "NCBI_Seqfeat.mod.dtd">
+%NCBI_Seqfeat_module;
+
+<!ENTITY % NCBI_Seqloc_module PUBLIC "-//NCBI//NCBI Seqloc Module//EN" "NCBI_Seqloc.mod.dtd">
+%NCBI_Seqloc_module;
+
+<!ENTITY % NCBI_Seqres_module PUBLIC "-//NCBI//NCBI Seqres Module//EN" "NCBI_Seqres.mod.dtd">
+%NCBI_Seqres_module;
+
+<!ENTITY % NCBI_Sequence_module PUBLIC "-//NCBI//NCBI Sequence Module//EN" "NCBI_Sequence.mod.dtd">
+%NCBI_Sequence_module;
+
+<!ENTITY % NCBI_TxInit_module PUBLIC "-//NCBI//NCBI TxInit Module//EN" "NCBI_TxInit.mod.dtd">
+%NCBI_TxInit_module;
+
+<!ENTITY % NCBI_Variation_module PUBLIC "-//NCBI//NCBI Variation Module//EN" "NCBI_Variation.mod.dtd">
+%NCBI_Variation_module;
+
+<!ENTITY % PDB_General_module PUBLIC "-//NCBI//PDB General Module//EN" "PDB_General.mod.dtd">
+%PDB_General_module;
+
+<!ENTITY % PIR_General_module PUBLIC "-//NCBI//PIR General Module//EN" "PIR_General.mod.dtd">
+%PIR_General_module;
+
+<!ENTITY % PRF_General_module PUBLIC "-//NCBI//PRF General Module//EN" "PRF_General.mod.dtd">
+%PRF_General_module;
+
+<!ENTITY % SP_General_module PUBLIC "-//NCBI//SP General Module//EN" "SP_General.mod.dtd">
+%SP_General_module;
diff --git a/dtd/SP_General.mod.dtd b/dtd/SP_General.mod.dtd
new file mode 100644
index 0000000..cab7937
--- /dev/null
+++ b/dtd/SP_General.mod.dtd
@@ -0,0 +1,94 @@
+<!-- ============================================
+     ::DATATOOL:: Generated from "seqblock.asn"
+     ::DATATOOL:: by application DATATOOL version 1.9.0
+     ::DATATOOL:: on 04/10/2008 16:04:22
+     ============================================ -->
+
+<!-- ============================================ -->
+<!-- This section is mapped from module "SP-General"
+================================================= -->
+
+<!--
+*********************************************************************
+
+  SWISSPROT specific data
+  This block of specifications was developed by Mark Cavanaugh of
+      NCBI working with Amos Bairoch of SWISSPROT
+
+*********************************************************************
+-->
+
+<!-- Elements used by other modules:
+          SP-block -->
+
+<!-- Elements referenced from other modules:
+          Date,
+          Dbtag FROM NCBI-General,
+          Seq-id FROM NCBI-Seqloc -->
+<!-- ============================================ -->
+
+<!-- SWISSPROT specific descriptions -->
+<!ELEMENT SP-block (
+        SP-block_class, 
+        SP-block_extra-acc?, 
+        SP-block_imeth?, 
+        SP-block_plasnm?, 
+        SP-block_seqref?, 
+        SP-block_dbref?, 
+        SP-block_keywords?, 
+        SP-block_created?, 
+        SP-block_sequpd?, 
+        SP-block_annotupd?)>
+
+<!ELEMENT SP-block_class %ENUM;>
+
+<!--
+    standard	-  conforms to all SWISSPROT checks
+    prelim	-  only seq and biblio checked
+-->
+<!ATTLIST SP-block_class value (
+        not-set |
+        standard |
+        prelim |
+        other
+        ) #REQUIRED >
+
+
+<!-- old SWISSPROT ids -->
+<!ELEMENT SP-block_extra-acc (SP-block_extra-acc_E*)>
+
+
+<!ELEMENT SP-block_extra-acc_E (#PCDATA)>
+
+<!-- seq known to start with Met -->
+<!ELEMENT SP-block_imeth EMPTY>
+<!ATTLIST SP-block_imeth value ( true | false ) "false" >
+
+
+<!-- plasmid names carrying gene -->
+<!ELEMENT SP-block_plasnm (SP-block_plasnm_E*)>
+
+
+<!ELEMENT SP-block_plasnm_E (#PCDATA)>
+
+<!-- xref to other sequences -->
+<!ELEMENT SP-block_seqref (Seq-id*)>
+
+<!-- xref to non-sequence dbases -->
+<!ELEMENT SP-block_dbref (Dbtag*)>
+
+<!-- keywords -->
+<!ELEMENT SP-block_keywords (SP-block_keywords_E*)>
+
+
+<!ELEMENT SP-block_keywords_E (#PCDATA)>
+
+<!-- creation date -->
+<!ELEMENT SP-block_created (Date)>
+
+<!-- sequence update -->
+<!ELEMENT SP-block_sequpd (Date)>
+
+<!-- annotation update -->
+<!ELEMENT SP-block_annotupd (Date)>
+
diff --git a/dtd/XHTMLtablesetup.ent b/dtd/XHTMLtablesetup.ent
new file mode 100644
index 0000000..423df66
--- /dev/null
+++ b/dtd/XHTMLtablesetup.ent
@@ -0,0 +1,309 @@
+<!-- ============================================================= -->
+<!--  MODULE:    XHTML Table Setup Module                          -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite XHTML Table Setup Module v2.0 20040830//EN"
+     Delivered as file "XHTMLtablesetup.ent"                       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Provides the organization for using the XHTML 1.1 -->
+<!--             table model                                       -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Overrides to standard parameter entities used  -->
+<!--                in the XHTML 1.1 table model                   -->
+<!--             2) Call to XHTML 1.1 table model                  -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             1) htmltable.dtd        XHTML 1.1 table model     -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-07-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+          
+  4. Updated public identifier to "v2.0 20040830"          
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  3. Added attribute "alternate-form-of" to <table> 
+     (by modifying parameter entity %Common.attrib;)
+     Rationale: Where multiple formats of an item (e.g., graphic 
+     file, media object, chemical structure) are available, this 
+     attribute indicates that a format is a secondary one and 
+     provides a link to the primary format, so that only one 
+     format of an item is displayed.
+     
+  2. Added attribute "id" information to parameter entity 
+     %Common-attrib;  
+     Rationale: Provide unique identifier so these elements can be 
+     linked to, especially for one version of a table to be linked 
+     to by alternate versions of the same table.
+      
+  1. Added attribute "content-type" information to <table> 
+     (by modifying parameter entity %Common.attrib;)     
+     Rationale: To identify and preserve the semantic intent of 
+     semantically rich source documents.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                          %inside-cell; 
+                                                                   -->
+<!-- ============================================================= -->
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    SET UP FOR THE XHTML 1.1 TABLE MODULE      -->
+<!-- ============================================================= -->
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR TABLE ELEMENT NAMES           -->
+<!-- ============================================================= -->
+
+
+<!ENTITY % table.qname  "table"                                      >
+<!ENTITY % caption.qname  
+                        "caption"                                    >
+<!ENTITY % thead.qname  "thead"                                      >
+<!ENTITY % tfoot.qname  "tfoot"                                      >
+<!ENTITY % tbody.qname  "tbody"                                      >
+<!ENTITY % colgroup.qname  
+                        "colgroup"                                   >
+<!ENTITY % col.qname    "col"                                        >
+<!ENTITY % tr.qname     "tr"                                         >
+<!ENTITY % th.qname     "th"                                         >
+<!ENTITY % td.qname     "td"                                         >
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR DATATYPE PARAMETER ENTITIES   -->
+<!-- ============================================================= -->
+
+
+<!ENTITY % Text.datatype  
+                        "CDATA"                                      >
+
+
+<!ENTITY % Number.datatype  
+                        "CDATA"                                      >
+
+
+<!ENTITY % MultiLength.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Length.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Pixels.datatype
+                        "CDATA"                                      >
+
+
+<!ENTITY % Character.datatype
+                        "CDATA"                                      >
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE PARAMETER ENTITIES  -->
+<!-- ============================================================= -->
+
+
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.       
+             id         Unique identifier so that the table can
+                        be referenced                              -->
+<!ENTITY % Common.attrib
+              "alternate-form-of
+                        IDREF                             #IMPLIED
+               content-type
+                        CDATA                             #IMPLIED
+               id       ID                                #IMPLIED"  >
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    OVER-RIDES TO REMOVE CAPTION               -->
+<!-- ============================================================= -->
+
+
+<!--                   CAPTION FOR A TABLE                         -->
+<!--                   Modification of the standard XHMTL model    
+                       Removed the definition of caption, so the
+                       element would not be multiply defined       -->
+<!ENTITY % caption.element  
+                       "IGNORE"                                      >
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    OVER-RIDES FOR CONTENT PARAMETER ENTITIES  -->
+<!-- ============================================================= -->
+
+
+<!--                   INLINE ELEMENTS                             -->
+<!--                   Modification of the standard XHMTL model     
+                       for inline elements used in the <caption>
+                       Set to the null because the <caption>
+                       element is now inside the table wrapper,
+                       not inside the table, as the original XHTML
+                       table intended                              -->
+<!ENTITY % Inline.mix  ""                                            >
+
+
+<!--                   CONTENTS OF A TABLE CELL                    -->
+<!--                   Modification of the standard XHMTL model
+                       used for the content of tables cells <th>
+                       and <td>                                    -->
+<!ENTITY % Flow.mix    "%inside-cell;"                               >
+
+
+<!--                   CONTENTS OF A TABLE                         -->
+<!--                   Modification of the standard XHMTL model    
+                       This has been modified from the XHTML model
+                       to remove the <caption> element from the
+                       <table> model, since in the Archiving and
+                       Interchange DTD Suite modular library, the 
+                       <caption> element is part  of the Table Wrapper 
+                       <table-wrap> element. No other changes were 
+                       made to the XHTML table content model.      -->
+<!ENTITY % table.content
+     "( ( %col.qname;* | %colgroup.qname;* ),
+        ( ( %thead.qname;?, %tfoot.qname;?, %tbody.qname;+ ) | 
+          ( %tr.qname;+ ) 
+        ) 
+      )"                                                             >
+ 
+
+<!-- ============================================================= -->
+<!--                    THE XML TABLE INVOCATION                   -->
+<!-- ============================================================= -->
+
+
+<!--                    XHTML TABLE MODEL                          -->
+<!--                    This module declares element types and 
+                        attributes used to provide table markup 
+                        similar to HTML 4, including features that 
+                        enable better accessibility for non-visual 
+                        user agents. This is the XHTML reformulation 
+                        of HTML as a modular XML application. 
+                        Copyright 1998-2001 W3C (MIT, INRIA, Keio), 
+                        All Rights Reserved.
+                        Revision: $Id: xhtml-table-1.mod,v 4.1 
+                        2001/04/10 09:42:30 altheim Exp $ SMI,using
+                        SYSTEM identifier:
+"http://www.w3.org/TR/xhtml-modularization/DTD/xhtml-table-1.mod"
+                                                                   -->
+%htmltable.dtd;
+
+
+<!-- ================== End XHTML Table Setup Module ============= -->
diff --git a/dtd/archivearticle.dtd b/dtd/archivearticle.dtd
new file mode 100644
index 0000000..9505c2d
--- /dev/null
+++ b/dtd/archivearticle.dtd
@@ -0,0 +1,952 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving and Interchange DTD             -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Journal Archiving and Interchange DTD v2.0 20040830//EN"
+     Delivered as file "archivearticle.dtd"                        -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    DTD to describe a full-text journal article       -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD         -->
+<!--             describes journal articles and some non-article   -->
+<!--             material such as product and book reviews for     -->
+<!--             repository or interchange purposes. It describes  -->
+<!--             both the metadata for a journal article and the   -->
+<!--             full content of the article.                      --> 
+<!--             This DTD was constructed using the modules in the -->
+<!--             Archiving and Interchange DTD Suite, using almost -->
+<!--             no customization.                                 -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Declare and invoke the Archival (Green) DTD-   -->
+<!--                specific module of modules, that names  any    -->
+<!--                modules created expressly for this DTD.        -->
+<!--                   (%archivecustom-modules.ent;)               -->
+<!--             2) Declare and invoke the DTD Suite module of     -->
+<!--                   modules (%modules.ent;), the Archiving and  -->
+<!--                   Interchange Suite module that names all the -->
+<!--                   Suite modules this DTD might invoke         -->
+<!--             3) Invoke DTD-specific classes over-ride module   -->
+<!--                               (%archivecustom-classes.ent;)   -->
+<!--             4) Invoke Suite default classes                   -->
+<!--                               (%default-classes.ent;)         -->
+<!--             5) Invoke DTD-specific mixes over-ride module     -->
+<!--                               (%archivecustom-mixes.ent;)     -->
+<!--             6) Invoke Suite default mixes                     -->
+<!--                               (%default-mixes.ent;)           -->
+<!--             7) Invoke DTD-specific content model over-ride    -->
+<!--                        module (%archivecustom-models.ent;)    -->
+<!--             8) Invoke the Common Element Module (from Suite)  -->
+<!--             9) Invoke all the Class Modules (from Suite) as   -->
+<!--                    well as any DTD-specific element modules   -->
+<!--            10) Parameter Entities for attribute values used   -->
+<!--                 in this module (DTD-specific definitions)     -->
+<!--            11) Define document element (Article <article>)    -->
+<!--            12) Define Front Matter <front>                    -->
+<!--            13) Define Body Matter <body>                      -->
+<!--            14) Define Back Matter <back>                      -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             The Journal Archiving and Interchange DTD is      -->
+<!--             built from the Archiving and Interchange DTD      -->
+<!--             Suite.                                            -->
+<!--                                                               -->
+<!--             The Archiving and Interchange DTD Suite evolved   -->
+<!--             from NLM/NCBI's pmc-1 DTD.                        -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--             contributions.                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-07-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  8. COMPLETE MODELS WHEN OVER-RIDING A CONTENT MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now.
+     Added parentheses to Parameter Entity and removed them 
+     from the Element Declarations:
+     -  %article-short-model; 
+     -  %article-full-model;
+     -  %front-model;
+     -  %body-model;
+     -  %back-model;
+
+  7. ATTRIBUTE VALUE LISTS
+     a. For the Green (Preservationist Archival) DTD, changed all 
+        explicit attribute value lists to CDATA. In the future, 
+        attribute value lists will be a feature of the Blue
+        (Publishing) and new Authoring DTDs. 
+        - Added Parameter Entities to hold "date-type"
+        - Changed the following attributes: 
+             article-type (in %article-atts;)
+     b. Removed Parameter Entity definition for
+        %article-types: since it was not being used at all! 
+        The attribute takes CDATA values.
+     
+     c. SUBARTICLE ATTRIBUTES - made into a Parameter Entity
+
+      
+  6. PARAMETER ENTITY CLEANUP AND REGULARIZATION
+
+     a. RENAME ELEMENT MIXES NOT TO END IN "-elements" 
+        ### Customization Alert ###
+        Names ending in "-elements" saved for the particular mixes
+        that will be added to #PCDATA for a particular element,
+        therefore:
+        -  %doc-back-matter-elements; ==> %doc-back-matter-mix;
+
+     b. FRONT MATTER MODEL - rewritten to use new class Parameter
+        Entity %front-back.class; and to use %list.class; rather 
+        than just <def-list>. This widens the model of Front Matter
+        by adding <list>.
+     
+  5. REMODULARIZATION - The entire Archiving and Interchange DTD
+     Suite was remodularized. Replaced the previous single Archiving
+     customization module (archivecustomize.ent) with the
+     following single-function customization modules:
+       - archivecustom-modules.ent (DTD-specific module naming)
+       - archivecustom-classes.ent (DTD-specific classes over-rides)
+       - default.classes (Default classes declarations)
+       - archivecustom-mixes.ent (DTD-specific mixes over-rides)
+       - default-mixes (Default mixes declarations)
+       - archivecustom-models.ent (DTD-specific content model 
+         over-rides to the base Suite) 
+            There are two types of such over-rides. One that 
+            replaces a complete content model (which are named with a 
+            suffix "-model") and those that are OR groups of 
+            elements, intended to be mixed with #PCDATA inside 
+            a particular model (which are named with an "-elements" 
+            suffix).
+  
+  4. VERSION 2.0 - Updated public identifier to "v2.0 20040830" on 
+     this module and the module-of-modules module and changed the
+     "dtd-version" fixed attribute to reference latest version 
+     of DTD (version "2.0").
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  3. Updated public identifier to "v1.1 20031101"
+
+  2. Changed Parameter Entity %dtd-version; to reference latest
+     version of DTD (version 1.1)
+
+  1. Updated public identifiers for modules.ent and 
+     archivecustomize.ent to reflect modules' modification.
+     Rationale: To call updated modules.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    DESIGN CONSIDERATIONS                      -->
+<!-- ============================================================= -->
+
+
+<!-- MODULAR DTD LIBRARY
+                        A set of journal archiving and interchange 
+                        DTD modules was written as the basis for 
+                        publishing, interchange, and repository 
+                        DTDs, with the intention that DTDs for 
+                        specific purposes, such as this Journal 
+                        Archiving and Interchange DTD, would be 
+                        developed based on them.
+                         
+                        This archiving DTD has been designed to  
+                        be descriptive, open, and inclusive to 
+                        allow journal articles to be translated into  
+                        this format as conveniently as possible
+                        from a wide variety of proprietary journal
+                        article DTDs (such as Blackwell, Keton, and
+                        Ovid).
+                       
+                        This Archiving DTD has been developed from
+                        the Archiving and Interchange DTD Suite
+                        modules, in the approved manner, making 
+                        changes to the declarations in those modules 
+                        by over-riding Parameter Entity contents 
+                        by redefining the entities in the  
+                            %archivecustomize.ent;
+                        module, which is called from this DTD file. 
+                        No changes to any of the original Archiving 
+                        and Interchange Suite modules are required 
+                        in order to use this DTD.                  -->
+
+
+<!-- ============================================================= -->
+<!--                    VERSION 1.0 DESIGN CONSIDERATIONS          -->
+<!-- ============================================================= -->
+
+
+<!-- THE MANY ROADS NOT TAKEN
+                        In the interest of getting a version of this
+                        DTD into production as quickly as practical,
+                        several structures and functions that might
+                        be appropriately included have been delayed 
+                        until a future version of this DTD. Such 
+                        components include:
+                          - Questions and Answers (These may be 
+                              modeled with the current DTDs by using 
+                              paragraphs and lists)
+                          - Continuing Medical Education material
+                             (which frequently contains questions 
+                             and answers)
+                          - Forms and fill-in-the-blank
+                          - Conflict of Interest statements and
+                              Financial Disclosure (May be modeled
+                              as paragraphs or footnotes)
+                          - Electronic and Digital Rights Management
+                          - Advertising included in the journal:
+                                + Job ads
+                                + Classified advertising
+                                + Display advertising
+                          - Calendars, meeting schedules, and 
+                              announcements.  (These can be handled 
+                              as ordinary articles or sections within
+                              articles)
+                          - About the Journal material such as Author
+                              Guidelines, Policy and Scope statements,
+                              Editorial or advisory boards, detailed
+                              indicia, etc.
+                                                                  -->
+ 
+ 
+<!-- ============================================================= -->
+<!--                    MODULES OF MODULES INVOKED                 -->
+<!-- ============================================================= -->
+
+
+<!--                    MODULE TO NAME DTD-SPECIFIC MODULES        -->
+<!--                    Names all DTD-specific external modules    -->
+<!ENTITY % archivecustom-modules.ent PUBLIC  
+"-//NLM//DTD Journal Archiving DTD-Specific Modules v2.0 20040830//EN"
+"archivecustom-modules.ent"                                          >
+%archivecustom-modules.ent;
+
+
+<!--                    MODULE TO NAME THE MODULES                 -->
+<!--                    Declares all the external modules that are  
+                        part of the modular Journal Archiving and 
+                        Interchange DTD Suite library. Thus it does
+                        NOT declare itself; the DTD-specific 
+                        module-of-modules; any DTD-specific class,
+                        mix, or model over-ride modules; or any new
+                        new content modules specific to this DTD.
+                        Those are declared in the DTD-specific
+                        module of modules.
+                           Since this module declares but does not
+                        invoke modules, this DTD then invokes any
+                        modules it uses by referencing the external 
+                        Parameter Entities defined in the Module of
+                        Modules. To include a set of elements (such 
+                        as all the lists or the MathML elements) this 
+                        module defines the external Parameter Entity
+                        for the module(s) that contains the MathML
+                        declarations and the DTD references that 
+                        entity.                                    -->
+<!ENTITY % modules.ent PUBLIC  
+"-//NLM//DTD Archiving and Interchange DTD Suite Module of Modules v2.0 20040830//EN" 
+"modules.ent"                                                        >
+%modules.ent;
+
+
+<!-- ============================================================= -->
+<!--                    CUSTOMIZATION MODULES INVOKED              -->
+<!--                    Note: These modules must be called after   -->
+<!--                    all Module of Modules but before any other -->
+<!--                    modules. Unlike any other grouping, order  -->
+<!--                    of these modules matters.                  -->
+<!-- ============================================================= -->
+
+
+<!--                    DTD-SPECIFIC CLASS CUSTOMIZATIONS MODULE   -->
+<!--                    Names the module that holds the DTD-specific
+                        class definitions for the Journal Archiving
+                        and Interchange DTD Suite.                
+                        (Defined in %archivecustom-modules.ent;)   -->
+%archivecustom-classes.ent;
+
+
+<!--                    DEFAULT ELEMENT CLASSES MODULE             -->
+<!--                    Names the module that holds the standard
+                        class definitions for the Journal Archiving
+                        and Interchange DTD Suite.                 -->
+%default-classes.ent;
+
+
+<!--                    DTD-SPECIFIC MIX CUSTOMIZATIONS MODULE     -->
+<!--                    Set up the Parameter Entities and element
+                        class definitions that will be used to
+                        over-ride some element mixes in this DTD.
+                        (Defined in %archivecustom-modules.ent;)   -->
+%archivecustom-mixes.ent;
+
+
+<!--                    DEFAULT MIX CUSTOMIZATIONS MODULE          -->
+<!--                    Names the module that holds the standard
+                        mix definitions for the Journal Archiving
+                        and Interchange DTD Suite.                 -->
+%default-mixes.ent;
+
+
+<!--                    DTD-SPECIFIC MODELS/ATTRIBUTES CUSTOMIZATIONS 
+                        MODULE                                     -->
+<!--                    Names the module that holds the over-rides
+                        of content models, attribute lists, elements
+                        lists to be used in content models, and
+                        attribute values. These are DTD-specific.
+                        (Defined in %archivecustom-modules.ent;)   -->
+%archivecustom-models.ent;
+
+
+<!-- ============================================================= -->
+<!--                    COMMON (SHARED) ELEMENTS MODULE INVOKED    -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON (SHARED) DECLARATIONS               -->
+<!--                    Declarations for elements, attributes, 
+                        entities, and Notations that are shared by
+                        more than one class module. Note: Must be 
+                        called before any of the class modules.    -->
+
+%common.ent;
+
+ 
+<!-- ============================================================= -->
+<!--                    JOURNAL ARTICLE CLASS ELEMENTS (alpha)     -->
+<!-- ============================================================= -->
+
+<!--                    ARTICLE METADATA ELEMENTS                  -->
+%articlemeta.ent;
+
+
+<!--                    BACK MATTER ELEMENTS                       -->
+%backmatter.ent;
+
+
+<!--                    DISPLAY (GRAPHICAL) ELEMENTS               -->
+%display.ent;
+
+
+<!--                    FORMATTING ELEMENT CLASSES                 -->
+<!--                    Elements that change rendition/display.    -->
+%format.ent;
+
+
+<!--                    JOURNAL METADATA ELEMENTS                  -->
+%journalmeta.ent;
+
+
+<!--                    LINK CLASS ELEMENTS                        -->
+%link.ent;
+
+
+<!--                    LIST CLASS ELEMENTS                        -->
+%list.ent;
+
+
+<!--                    MATH ELEMENTS                              -->
+%math.ent;
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+%para.ent;
+
+
+<!--                    PHRASE-LEVEL ELEMENTS                      -->
+%phrase.ent;
+
+
+<!--                    BIBLIOGRAPHIC REFERENCE (CITATION) 
+                        CLASS ELEMENTS                             -->
+%references.ent;
+
+
+<!--                    SECTION ELEMENTS                           -->
+%section.ent;
+
+ 
+<!-- ============================================================= -->
+<!--                    THE REST OF THE EXTERNAL MODULES INVOKED   -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML SETUP MODULE                        -->
+<!--                    Invoke the MathML modules                  -->
+%mathmlsetup.ent;                                            
+
+
+
+<!--                    XHTML TABLE SETUP MODULE                   -->
+<!--                    Set up the necessary Parameter Entity values
+                        and then invoke XHTML (HTML 4.0) table 
+                        module                                     -->
+%XHTMLtablesetup.ent;
+
+
+<!--                    SPECIAL CHARACTERS DECLARATIONS            -->
+<!--                    Standard XML special character entities 
+                        used in this DTD                           -->
+%xmlspecchars.ent;   
+
+
+<!--                    CUSTOM SPECIAL CHARACTERS DECLARATIONS     -->
+<!--                    Custom special character entities created 
+                        specifically for use in this DTD Suite     -->
+%chars.ent;
+
+
+<!--                    NOTATION DECLARATIONS MODULE               -->
+%notat.ent;
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    DTD VERSION                                -->
+<!--                    What version of this DTD was used to make
+                        the document instance under consideration.
+                        Note that this is a fixed value that should
+                        change every time the DTD changes versions or
+                        revisions.                                 -->
+<!ENTITY % dtd-version   
+            "dtd-version        
+                        CDATA                         #FIXED '2.0'"  >
+
+
+
+<!--                    ARTICLE ATTRIBUTES                         -->
+<!--                    Attributes for the top-level element
+                        <article>                                  -->
+<!ENTITY % article-atts
+            "article-type   
+                        CDATA                              #IMPLIED
+             %dtd-version;                              
+             xml:lang   NMTOKEN                            'EN'     
+             %XLINK.xmlns.attrib;
+             %MATHML.xmlns.attrib;"                                  >
+
+
+<!--                    SUB-ARTICLE ATTRIBUTES                     -->
+<!--                    Attributes for the <sub-article> element   -->
+<!ENTITY % sub-article-atts
+            "article-type   
+                        CDATA                              #IMPLIED
+             xml:lang   NMTOKEN                            'EN'"     >
+
+
+<!--                    RESPONSE ATTRIBUTES                        -->
+<!--                    Attributes for the <response> element      -->
+<!ENTITY % response-atts
+            "response-type   
+                        CDATA                              #IMPLIED
+             xml:lang   NMTOKEN                            'EN'"     >
+                                                               
+
+<!-- ============================================================= -->
+<!--                    JOURNAL ARTICLE ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE MODEL (LIMITED)                    -->
+<!ENTITY % article-short-model    
+                        "(front, body?, back?)"                      >
+
+
+<!--                    ARTICLE MODEL WITH SUBARTICLE OR RESPONSE  -->
+<!ENTITY % article-full-model
+                        "(front, body?, back?, 
+                          (sub-article* | response*) )"              >
+
+
+<!--                    ARTICLE                                    -->
+<!--                    The complete content of a journal article.
+                        An article is potentially divided into 
+                        four (more typically three) parts: 1) the
+                        Front Matter (article metadata or header),
+                        the body of the article (main content), any
+                        ancillary information such as a glossary or
+                        appendix, and (the least common) a
+                        response, that is a commentary on the
+                        article itself.                            -->
+<!ELEMENT  article      %article-full-model;                         >
+
+<!--         article-type   
+                        What kind of article is this?  
+                        Note: When the article is a commentary on 
+                        another article, for example a correction or
+                        addendum, this attribute is metadata for the 
+                        commentary itself, it does NOT define the 
+                        kind of article that is being corrected or
+                        amended.
+                          This is an optional CDATA attribute, but
+                        an article type should be identified if
+                        possible. Potential values include:
+                          abstract   The article itself is an 
+                                     abstract (of a paper or
+                                     presentation), usually that 
+                                     has been presented or published 
+                                     separately.
+                          addendum   A published item that adds
+                                     additional information or
+                                     clarification to another item
+                                     Similar value "correction"
+                                     corrects an error in previously
+                                     published material
+                          announcement
+                                     Material announced in the 
+                                     publication (may or may not be
+                                     directly related to the pub)
+                          article-commentary
+                                     An item whose subject or focus
+                                     is another article or articles; 
+                                     this article comments on the 
+                                     other article(s) (For example,
+                                     for a controversial article, the
+                                     editors of the publication 
+                                     might invite an author of the
+                                     opposing opinion to comment on
+                                     the first article, and publish
+                                     the two together.)
+                          book-review
+                                     Review or analysis of one or more
+                                     printed or online books (Note
+                                     that product reviews are a
+                                     separate type.)
+                          books-received
+                                     Notification of items such as
+                                     books that have been received
+                                     by the publication for review
+                                     or other consideration
+                          brief-report
+                                     A short and/or rapid announcement 
+                                     of research results
+                          calendar   A list of events
+                          case-report
+                                     Case study, case report, or other
+                                     description of a case
+                          correction A modification, or
+                                     correction of previously
+                                     published material (sometimes
+                                     called "errata") Similar value
+                                     "addendum" merely adds to 
+                                     previously published material
+                          discussion Invited discussion related to a 
+                                     specific article or issue
+                          editorial  Opinion piece, policy statement,
+                                     or general commentary, typically
+                                     written by staff of the
+                                     publication. Note: similar value
+                                     "article-commentary" is reserved 
+                                     for a commentary on a specific
+                                     article or articles.
+                          in-brief   Summary of items in the current 
+                                     issue
+                          introduction
+                                     An introduction to the
+                                     publication, a series of articles
+                                     within the publication, etc.,
+                                     typically for a special section
+                                     or issue
+                          letter     Letter to the publication,
+                                     typically commenting upon a
+                                     published item
+                          meeting-report
+                                      Report of a conference, 
+                                      symposium, or meeting
+                          news        News item
+                          obituary    Announcement of a death or
+                                      appreciation of a colleague
+                                      who has recently died
+                          oration     Reprint of a speech or oral 
+                                      presentation
+                          other       Not any of the article types
+                                      explicitly named in this list
+                          product-review
+                                      Description, analysis, or review
+                                      of a product or service, for
+                                      example a software package (note
+                                      that book review is a separate
+                                      type)
+                          reply       Reply to a letter or commentary,
+                                      typically by the original
+                                      author commenting upon the
+                                      comments
+                          research-article
+                                      Research article
+                          retraction  Retraction of previously
+                                      published material
+                          review-article
+                                      Review or state-of-the-art
+                                      summary article                   
+             dtd-version 
+                        Which version of the DTD does this article
+                        use? The value is a #FIXED attribute, so
+                        the entire attribute definition is defined
+                        in a Parameter Entity, so the next version
+                        of the DTD can use a different #FIXED value.
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German).  These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).
+                        Processing and Conversion Note: All other
+                        xml:lang attributes within the article
+                        inherit the value set on <article> unless
+                        explicitly set themselves with their own
+                        "xml:lang" attribute.                      
+             xmlns      Set up the pseudo-attributes for the
+                        namespaces for any namespaces used in this
+                        DTD.  XLink and MathML are set up in the
+                        MathML modules. These xmlns are called
+                        here because certain older tools will not
+                        work properly with namespaces unless they
+                        are declared on the top level element.
+                        The PEs are defined in the MathML modules. -->
+<!ATTLIST  article
+             %article-atts;                                          >
+
+
+<!-- ============================================================= -->
+<!--                    FRONT MATTER ELEMENTS                      -->
+<!-- ============================================================= -->
+
+
+<!--                    FRONT MATTER MODEL                         -->
+<!ENTITY % front-model  "(journal-meta?, article-meta, 
+                          (%list.class; | %front-back.class;)* )"    > 
+ 
+
+<!--                    FRONT MATTER                               -->
+<!--                    The metadata concerning an article, such as
+                        the name and issue of the journal in which it
+                        appears and the name and author(s) of the 
+                        article.
+                        In some journal DTDs this is called the
+                        header information, and it includes metadata
+                        concerning the journal <journal-meta> and 
+                        metadata concerning the issue of the journal 
+                        and the individual article <article-meta>. -->
+<!ELEMENT  front        %front-model;                                > 
+
+
+<!-- ============================================================= -->
+<!--                    BODY ELEMENTS                              -->
+<!-- ============================================================= -->
+
+
+<!--                    BODY MODEL                                 -->
+<!--                    Content model for the Body (main textual
+                        content) of a journal article.             -->
+<!ENTITY % body-model   "((%para-level;)*, (%sec-level;)* )"         > 
+
+
+<!--                    BODY OF THE ARTICLE                        -->
+<!--                    The main textual portion of the article that
+                        conveys the content.                       -->
+<!ELEMENT  body         %body-model;                                 >
+
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENTS                       -->
+<!-- ============================================================= -->
+
+
+<!--                    BACK MATTER MODEL                          -->
+<!--                    Content model for the Back Matter (ancillary
+                        material such as appendices) of a journal
+                        article.                                   -->
+<!ENTITY % back-model   "(title*, (%doc-back-matter-mix;)* )"        >
+
+
+<!--                    BACK MATTER                                -->
+<!--                    Ancillary or supporting material not included
+                        as part of the main textual content of a 
+                        journal article, for example appendices and
+                        acknowledgments.                           -->
+<!ELEMENT  back         %back-model;                                 >
+
+
+<!-- ============================================================= -->
+<!--                    SUBARTICLE                                 -->
+<!-- ============================================================= -->
+
+
+<!--                    SUBARTICLE                                 -->
+<!--                    An article that is completely contained 
+                        inside another article. Both the article and
+                        the subarticle have their own metadata. The
+                        article has at very least journal and issue
+                        information and start and end pages; it may
+                        have a title, author, or other metadata.
+                        The subarticle has its own, independent 
+                        metadata, such as authors, that it 
+                        may not share with the article that
+                        encloses it.                                  
+                        Conversion Note: "Superarticles" that contain
+                        other articles rarely contain much content of
+                        their own, perhaps just a title and 
+                        introductory paragraph.                   
+                        Authoring Note: This construction is NOT to 
+                        be used for an article and its response, or
+                        for a series of responses, even if the
+                        original article to which the responses are
+                        replying is elsewhere.                     -->
+<!ELEMENT  sub-article  %article-full-model;                         >
+<!--         article-type   
+                        What kind of article is this?  
+                        Note: When the article is a commentary on 
+                        another article, for example a correction or
+                        addendum, this attribute is metadata for the 
+                        commentary itself, it does NOT define the 
+                        kind of article that is being corrected or
+                        amended.
+                        Authoring Note: All articles
+                        should have types assigned if possible.
+                          abstract   The article itself is an 
+                                     abstract (of a paper or
+                                     presentation), usually that 
+                                     has been presented or published 
+                                     separately.
+                          addendum   A published item that adds
+                                     additional information or
+                                     clarification to another item
+                                     Similar value "correction"
+                                     corrects an error in previously
+                                     published material
+                          announcement
+                                     Material announced in the 
+                                     publication (may or may not be
+                                     directly related to the pub)
+                          article-commentary
+                                     An item whose subject or focus
+                                     is another article or articles; 
+                                     this article comments on the 
+                                     other article(s) (For example,
+                                     for a controversial article, the
+                                     editors of the publication 
+                                     might invite an author of the
+                                     opposing opinion to comment on
+                                     the first article, and publish
+                                     the two together.)
+                          book-review
+                                     Review or analysis of one or more
+                                     printed or online books (Note
+                                     that product reviews are a
+                                     separate type.)
+                          books-received
+                                     Notification of items such as
+                                     books that have been received
+                                     by the publication for review
+                                     or other consideration
+                          brief-report
+                                     A short and/or rapid announcement 
+                                     of research results
+                          calendar   A list of events
+                          case-report
+                                     Case study, case report, or other
+                                     description of a case
+                          correction A modification, or
+                                     correction of previously
+                                     published material (sometimes
+                                     called "errata") Similar value
+                                     "addendum" merely adds to 
+                                     previously published material
+                          discussion Invited discussion related to a 
+                                     specific article or issue
+                          editorial  Opinion piece, policy statement,
+                                     or general commentary, typically
+                                     written by staff of the
+                                     publication. Note: similar value
+                                     "article-commentary" is reserved 
+                                     for a commentary on a specific
+                                     article or articles.
+                          in-brief   Summary of items in the current 
+                                     issue
+                          introduction
+                                     An introduction to the
+                                     publication, a series of articles
+                                     within the publication, etc.,
+                                     typically for a special section
+                                     or issue
+                          letter     Letter to the publication,
+                                     typically commenting upon a
+                                     published item
+                          meeting-report
+                                      Report of a conference, 
+                                      symposium, or meeting
+                          news        News item
+                          obituary    Announcement of a death or
+                                      appreciation of a colleague
+                                      who has recently died
+                          oration     Reprint of a speech or oral 
+                                      presentation
+                          other       Not any of the article types
+                                      explicitly named in this list
+                          product-review
+                                      Description, analysis, or review
+                                      of a product or service, for
+                                      example a software package (note
+                                      that book review is a separate
+                                      type)
+                          reply       Reply to a letter or commentary,
+                                      typically by the original
+                                      author commenting upon the
+                                      comments
+                          research-article
+                                      Research article
+                          retraction  Retraction of previously
+                                      published material
+                          review-article
+                                      Review or state-of-the-art
+                                      summary article                   
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German).  These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).
+                        Processing and Conversion Note: All other
+                        xml:lang attributes within the article
+                        inherit the value set on <article> unless
+                        explicitly set themselves with their own
+                        "xml:lang" attribute.                      -->
+<!ATTLIST  sub-article 
+             %sub-article-atts;                                      >
+             
+             
+<!-- ============================================================= -->
+<!--                    RESPONSE ELEMENTS                          -->
+<!-- ============================================================= -->
+
+
+<!--                    RESPONSE                                   -->
+<!--                    Reply, response, or commentary concerning the
+                        journal article. In the typical case, the
+                        response is included in the same XML package 
+                        as the original article, and thus attached 
+                        at the end of the article proper.
+                        Authoring Note: Frequently a reply or
+                        response is an article in its own right, not
+                        included as part of the original article.
+                        Such an article could use the 
+                        <related-article> element in the article 
+                        metadata to record the metadata for the 
+                        original article.     
+                        Conversion Note: This construction can also
+                        be used for the pathological case, rarely
+                        seen, in which several responses to an 
+                        article are lumped together into a single
+                        container which is not the original article,
+                        merely a collection of responses. In one
+                        example we examined, the first two responses
+                        were to an original article which was else-
+                        where and the third response was a response
+                        to the first two responses.                -->
+<!ELEMENT  response     %article-short-model;                        >
+
+<!--         response-type
+                        What kind of response is this?
+                        Note: This does NOT define the kind of
+                        article on which the response is commenting,
+                        it is metadata for the response itself.
+                        Authoring Note: Use of this attribute is not
+                        to be encouraged.  It was added to allow for
+                        observed cases of a series of articles
+                        being chained together as an introduction,
+                        an article, and several responses.          
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German).  These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).
+                        Processing and Conversion Note: All other
+                        xml:lang attributes within the article
+                        inherit the value set on <article> unless
+                        explicitly set themselves with their own
+                        "xml:lang" attribute.                      -->
+<!ATTLIST  response
+             %response-atts;                                         >
+
+
+<!-- ================== End Journal Archiving and Interchange DTD  -->
diff --git a/dtd/archivecustom-classes.ent b/dtd/archivecustom-classes.ent
new file mode 100644
index 0000000..91f70cf
--- /dev/null
+++ b/dtd/archivecustom-classes.ent
@@ -0,0 +1,157 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD Customize Classes Module    -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Journal Archiving DTD Customize Classes Module v2.0 20040830//EN"
+Delivered as file "archivecustom-classes.ent"                      -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             over-ride the named element classes               -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before the   -->
+<!--             content modules that declare elements, and before -->
+<!--             the default classes module.                       -->
+<!--                                                               -->
+<!-- CONTAINS:   1) PEs for changing the contents of the default   -->
+<!--                element classes                                -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             B. Tommie Usdin (Mulberry Technologies, Inc.)     -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+          
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  6. STRING-NAME
+     Added <string-name> everywhere <name> was allowed before
+
+  5. CONTRIBUTOR / CONTRIBUTOR GROUP
+     a. <etal> added to %contrib-info.class;, strict sequence after
+        the contributor name no longer enforced.
+        
+     b. <uri> and <fn> added to %contrib-info.class;
+        
+     c. Added <x> (generated punctuation) to:
+         - <contributor> (through %x.class;)
+         - <contributor-group>  (through %x.class;)
+     
+  4. <x> GENERATED TEXT AND PUNCTUATION ELEMENT ADDED TO
+     - <kwd-group> by way of %keyword-group-model;
+     - <def-list> by way of %def-list-model;
+     - <def-item> by way of %def-item-model;
+     - <article-meta> by way of %article-meta-model;
+     - <contributor> and <contributor-group> (via %contrib-model;
+       and %contrib-group-model;)
+     - <person-group> by way of %person-group-model;
+     - <x> was added to everywhere the %references.class; was used, 
+       though NOT by adding it to the class itself.
+      
+  3. DOI/ID - in view of the larger role that some publishers
+     are giving to DOIs, a new class Parameter Entity %id.class;
+     was established that holds the new element Object Identifier
+     <object-id>, which can be used to capture any publisher's or 
+     archive's ID. This was modeled as an element rather than as 
+     an attribute to allow for multiple IDs. Used in:
+      - %references.class (therefore inside <citation>, 
+           <related-article>, and <product>)
+        
+  2. RENAME EXISTING CLASSES
+     ### Customization Alert ###
+     Some classes did not have the ".class" suffix. Changed the names 
+     to add the class suffix:
+      - %contrib-info.class;
+                
+  1. Created this module as version "v2.0 20040830"                -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR CLASS OVER-RIDES    -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    METADATA CLASSES (articlemeta.ent)         -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR INFORMATION                    -->
+<!--                    Metadata about a contributor               
+                        Added <fn>                                 -->
+<!ENTITY % contrib-info.class
+                        "address | aff | author-comment | bio | 
+                         email |  etal | ext-link | fn | 
+                         on-behalf-of | role | uri | xref"           >
+                         
+
+<!-- ============================================================= -->
+<!--                    PRESENTATION INFO CLASSES                  -->
+<!-- ============================================================= -->
+                        
+                        
+<!--                    X-GENERATED PUNCTUATION CLASS              -->
+<!--                    Class containing a single element that will
+                        hold generated punctuation or other 
+                        generatable text, for example, the commas or
+                        semicolons between keywords.
+                        This textual material element has been 
+                        created:
+                         - to match existing input DTDs
+                         - to identify such material, so that it
+                             can be processed (such as removed)
+                         - to try to remove look-and-feel material
+                             from semantic material such as keywords.
+                                                                   -->
+<!ENTITY % x.class      "x"                                          >
+              
+              
+<!-- ================== End Archiving Classes Customization ====== -->
diff --git a/dtd/archivecustom-mixes.ent b/dtd/archivecustom-mixes.ent
new file mode 100644
index 0000000..06116fe
--- /dev/null
+++ b/dtd/archivecustom-mixes.ent
@@ -0,0 +1,306 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD Customize Mixes Module      -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Journal Archiving DTD Customize Mixes Module v2.0 20040830//EN"
+Delivered as file "archivecustom-mixes.ent"                        -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Declares over-ride values for the default element -->
+<!--             mixes in the Suite. These over-rides are specific -->
+<!--             to the Journal Archiving and Interchange DTD.     -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before the   -->
+<!--             default mixes modules (%default-mixes;)           -->
+<!--                                                               -->
+<!-- CONTAINS:   1) PEs that define the element mixes to be        -->
+<!--                over-ridden                                    -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             B. Tommie Usdin (Mulberry Technologies, Inc.)     -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-07-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  3. LOOSENING ALL PHRASE-LEVEL ELEMENT USAGE - As part of the
+     version 2.0 split into 3 DTDs, removed the distinctions
+     between where phrase-level elements may be used. Now, if
+     you can use one phrase-level, you can use them all. This
+     allows any in any order. Phrase-level elements include the
+     address elements (which is only a little odd for <addr-line>).
+     
+     The New Parameter Entity is %all-phrase; used inside:
+       - %inside-cell;
+     as well as inside the following inline mixes:
+       - %emphasized-text;
+       - %just-rendition;
+       - %rendition-plus;
+       - %simple-phrase;
+       - %simple-text;
+            
+  2. REGULARIZING CLASS/MIX NAMES AND USAGE 
+
+     a. MODIFY INLINE PARAMETER MIXES
+        ### Customization Alert ###
+        Changed the inline-mix Parameter Entities to use the 
+        OR-bar-first mechanism. This requires changing not
+        only the Parameter Entity, but all content models that
+        use the entity.
+        - %emphasized-text; (used in most of the format elements)
+        - %simple-phrase; 
+        - %simple-text; 
+        The following PEs were already in OR-bar-first form and were
+        not changed:
+        - %just-rendition;
+        - %rendition-plus;
+  
+     b. RENAME EXISTING MIXES
+        ### Customization Alert ###
+        Rename all general-purpose mixes whose named ended in the 
+        suffix "-elements", since that suffix is reserved for mixes 
+        that are mixed with #PCDATA for a particular element
+        -  %doc-back-matter-elements; ==> %doc-back-matter-mix;
+        -  %sec-back-matter-elements; ==> %sec-back-matter-mix;
+        
+     c. RENAME EXISTING CLASSES
+        ### Customization Alert ###
+        Some classes did not have the ".class" suffix in their
+        names. Changed the names to add the class suffix.
+        - %block-math.class; used in 
+             - %p-elements;
+             - %inside-cell;
+        - %inline-math.class; used in -%all-phrase;
+
+
+     d.  MODIFIED %doc-back-matter-mix; (formerly named
+         %doc-back-matter-elements;
+         ### Customization Alert ###
+         Corrected the historical error that had this Parameter 
+         Entity calling a mix (-%sec-level;) and not a class 
+         (-%sec.class);. Since there was nothing in -%sec-level; 
+         but <sec>, this has no effect on blue or green but may 
+         change existing customizations.
+                
+  1. Created this module as version "v2.0 20040830"                -->
+                          
+                        
+<!-- ============================================================= -->
+<!--                    ELEMENT MIXES FOR USE IN CONTENT MODELS    -->
+<!--                    (MIXES ARE COMPOSED USING CLASSES)         -->
+<!-- ============================================================= -->
+                         
+
+<!-- ============================================================= -->
+<!--                    EXCEPTION: A MIX USED IN OTHER MIXES       -->
+<!-- ============================================================= -->
+
+
+<!--                    ALL PHRASE-LEVEL ELEMENTS                  -->
+<!--                    This Parameter Entity contains all of the
+                        phrase-level elements in the entire
+                        Archival Tag Set EXCEPT THE <x> AND
+                        <break> elements.
+                        This change is as a result of the version
+                        2.0 of the DTDs splitting into three.
+                        The restrictions in the phrase-level content 
+                        models were in place to help regularize the
+                        archive. They have no place in a more
+                        descriptive, open archival DTD. The cleanest
+                        way to accomplish this is to relax the
+                        fairly clean class/mix structure that the
+                        DTD uses and do one layer of "onion" entities.
+                          Thus the individual entities such as
+                        %emphasized-text; will continue to exist,
+                        but they will contain all the phrase-level
+                        elements, through this Parameter Entity.
+                        Developer's Note: At the moment, the <break>
+                        and <x> elements are not included considered
+                        to be "ordinary" phrase-level elements and
+                        are not in %all-phrase;.
+                        ### Usage Alert ###
+                        Design Notes: 
+                        1) Since this is used in other mixes,
+                        unlike all other mixes, all-phrase must be 
+                        declared first in this module. 
+                        2) Since it acts  like a class (is used in
+                        other mixes) it does not start with an 
+                        OR bar, as all other inline mixes do       -->
+<!ENTITY % all-phrase   "%address-link.class; | %article-link.class; |
+                         %appearance.class; | %emphasis.class;  |
+                         %inline-display.class; | 
+                         %inline-math.class; | %math.class; |  
+                         %phrase.class; | %simple-link.class; |
+                         %subsup.class;"                             >
+
+                         
+<!-- ============================================================= -->
+<!--                    TABLE ELEMENT MIXES                        -->
+<!-- ============================================================= -->
+                          
+
+<!--                    INSIDE TABLE CELL ELEMENTS                 -->
+<!--                    Mixed with #PCDATA inside a table cell, such
+                        as a <td> or <th> element in the XHTML table
+                        model, the <entry> element in the OASIS CALS
+                        table model, etc.  This PE will be used as the
+                        value of %Flow.mix;, %paracon;, etc.
+                        ### Usage Alert ###
+                        Design Note: Inside cell is an exception, an
+                        inline mix that does not start with an OR
+                        bar. This is because is used within the
+                        PE -%Flow.mix;, which is an inline mix
+                        defined in the course of the XHTML Table DTD,
+                        a DTD not under control of this DTD Suite. -->
+<!ENTITY % inside-cell  "%all-phrase;  | %block-math.class; |
+                         %break.class; | %citation.class; |
+                         %list.class;  | %simple-display.class;"     >
+                         
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENT MIXES(%backmatter.ent;)-->
+<!-- ============================================================= -->
+
+
+<!--                    DOCUMENT BACK MATTER ELEMENTS              -->
+<!--                    Back Matter Elements used by a full document
+                        such as a journal article. This is an element
+                        grouping rather than a class. These 
+                        elements may also appear in the content models 
+                        of structural elements, such as back matter.
+                                                                   -->
+<!ENTITY % doc-back-matter-mix
+                        "%back.class; | %front-back.class; | 
+                         %sec.class;"                                >
+                         
+
+<!-- ============================================================= -->
+<!--                    INLINE ELEMENT MIXES                       -->
+<!-- ============================================================= -->
+
+
+<!--                    EMPHASIS MIX ELEMENTS                      -->
+<!--                    Elements that may be used inside most of the
+                        emphasis class elements                    -->
+<!ENTITY % emphasized-text  
+                        "| %all-phrase;"                             >
+                         
+
+<!--                    JUST RENDITION                             -->
+<!--                    Only the simplest of the typographic 
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be stripped down to only
+                        subscript and superscript by some, more
+                        restrictive DTDs.                         
+                        DTD Maintenance Note: This Parameter Entity
+                        and the related PE "rendition-plus" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to change similar models individually .    -->
+<!ENTITY % just-rendition
+                        "| %all-phrase;"                             >
+                         
+
+<!--                    RENDITION MARKUP PLUS                      -->
+<!--                    Only the simplest of the typographic 
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be enhanced slightly in some
+                        more permissive DTDs, and should always
+                        contain at least typographic emphasis, 
+                        subscript, and superscript.  
+                        DTD Maintenance Note: This Parameter Entity
+                        and the related PE "Just-rendition" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to individually change similar models. 
+                        modify entire groups of elements, but not
+                        to change similar models individually .    -->
+<!ENTITY % rendition-plus                             
+                        "| %all-phrase;"                             >
+
+
+<!--                    SIMPLE PHRASE-LEVEL TEXTUAL ELEMENTS       -->
+<!--                    Elements that may be used almost anywhere
+                        text is used, for example, inside a title.
+                        Simple text plus inline display and math 
+                        elements.                                  -->
+<!ENTITY % simple-phrase
+                        "| %all-phrase;"                             >
+
+
+<!--                    SIMPLE TEXTUAL CONTENT                     -->
+<!--                    Elements that may be used inside elements
+                        that are really expected to be #PCDATA and
+                        not to contain any of these things.
+                        Note that in the original, this contained
+                        no math and no links, thus is was even
+                        simpler than %simple-phrase; Now (v2 2004)
+                        the two are the same.                      -->
+<!ENTITY % simple-text  "| %all-phrase;"                             >
+
+
+<!-- ================== End Archiving DTD Mixes Customization ==== -->
diff --git a/dtd/archivecustom-models.ent b/dtd/archivecustom-models.ent
new file mode 100644
index 0000000..bafcc76
--- /dev/null
+++ b/dtd/archivecustom-models.ent
@@ -0,0 +1,756 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD Customize Content and       -->
+<!--             Attributes Module                                 -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Journal Archiving DTD Customize Content and Attributes Module v2.0 20040830//EN"
+Delivered as file "archivecustom-models.ent"                       -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             over-ride content models or parts of content      -->
+<!--             models when making a new DTD from the modules of  -->
+<!--             the Archiving and Interchange DTD Suite.          -->
+<!--                                                               -->
+<!--             Or-groups within models should use mixes or       -->
+<!--             classes rather than name elements directly.       -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before the   -->
+<!--             content modules that declare elements.            -->
+<!--                                                               -->
+<!-- CONTAINS:   1) PEs that define OR lists of elements to be     -->
+<!--                mixed with #PCDATA in element content models   -->
+<!--                (all PEs are named "yyy-elements", where "yyy" -->
+<!--                is the name of the primary element whose       -->
+<!--                content model will use the declared PE.)       -->
+<!--             2) PEs that define complete content models.       -->
+<!--                (names ending in the suffix "-model")          -->
+<!--             3) PEs that define attribute list or attribute    -->
+<!--                value over-rides                               -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             B. Tommie Usdin (Mulberry Technologies, Inc.)     -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+ 14. OTHER-TABLE-WRAP-ATTS - Moved this Parameter Entity to the
+     display module, so all variant DTDs could use it.
+
+ 13. LOOSENING ALL PHRASE-LEVEL ELEMENT USAGE - As part of the
+     version 2.0 split into 3 DTDs, removed the distinctions
+     between where phrase-level elements may be used. Now, if
+     you can use one phrase-level, you can use them all. This
+     allows any in any order. Phrase-level elements include the
+     address elements (which is only a little odd for <addr-line>).
+     
+     New Parameter Entity is %all-phrase; used inside:
+      - the Parameter Entities named "nnn-elements" that can
+        be mixed with #PCDATA in the content model of the nnn
+        element (for which the defaults are defined in the module 
+        that holds the element, just before the element, and the
+        over-rides are defined below.)
+      - And the following content model over-rides:
+        . %chem-struct-model; (via %chem-struct-elements;)
+        . %copyright-statement-model; (renamed -elements)
+        . %history-model; (via %history-elements)
+
+ 12. ACCESS CLASS
+        ### Customization Alert ###
+     a. Took <ext-link> out of -%access.class;. It did not belong.
+        It belongs in -%address-link.class;
+     b. Added -%address-link.class; to anywhere regular
+        %access.class; was used.
+
+ 11. ATTRIBUTE VALUE LISTS - The Green (Archival) DTD needed to
+     change all explicit attribute value lists in the DTD to CDATA. 
+     In the future, explicit list types will be a feature of the
+     Blue (Publishing) and new Authoring DTDs. Therefore, added
+     Parameter Entities to hold the following attributes:
+       - %date-atts; (date-type changed from list to CDATA)
+       - %article-id-atts; (pub-id-type changed to CDATA)
+       - %pub-id-atts; (pub-id-type changed to CDATA)
+       - %xref-atts; (ref-type changed to CDATA)
+     
+ 10. <x> GENERATED TEXT AND PUNCTUATION ELEMENT:
+     a. Added to the following models:
+        - %def-list-model;
+        - %def-item-model;
+        - %article-meta-model;
+        - %person-group-model;
+     b. Added to %contrib-model; and %contrib-group-model; 
+        (via %x.class;)  
+        (Therefore added to <contributor> and
+         <contributor-group>)
+     c. Also added to the element groups for:
+        - %aff-elements;
+        - %citation-elements;
+        - %collab-elements;
+        - %corresp-elements;
+        - %product-elements;
+        - %publisher-loc-elements;
+        - %related-article-elements;
+
+  9. OVER-RIDE OF ARTICLE-META-MODEL - Added new elements
+     a. <custom-meta-wrap> containing <custom-meta>
+     b. <email>
+     c. <issue-id>
+     d. <issue-title> (for special title or theme)
+     e. <page-range>
+     f. <volume-id>
+     g. <license> (for now, just a bucket into which to
+        dump license-related material until the AIT Workgroup
+        does more analysis)
+
+  8. DATES
+     a. Made a new Parameter Entity %string-date-elements; to
+        hold all the elements that may be mixed with #PCDATA
+        in a <string-date>
+     b. Used %date-parts.class; and %x.class; in 
+           new %string-date-elements;
+
+  7. PRODUCT AND RELATED ARTICLE
+     Added reference elements to both
+
+  6. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now,
+     as this is the most flexible system, allowing for
+     #PCDATA, mixed, or element content. (This is in direct
+     contrast to the "-element" suffixed models, which are
+     designed to prohibit element content and permit only
+     #PCDATA or mixed content.) Added parentheses to Parameter
+     Entity and removed them from the Element Declaration.
+     -  %article-meta-model; 
+     -  %contrib-group-model;
+     -  %contrib-model;
+     -  %def-item-model;
+     -  %def-list-model; 
+     -  %kwd-group-model; 
+
+  5. CITATION MODEL / COPYRIGHT STATEMENT MODEL
+     ### Customization Alert ###
+     -  Replaced the Parameter Entity %citation-model; with the
+        OR list Parameter Entity %citation-elements; and used that
+        within the content model of <citation>
+     -  Similar Change for copyright-statement-elements
+
+  4. DEF-ITEM LOOSENING
+     a. Made <term> optional and repeatable so that incomplete
+        <def-item>s can be captured. 
+     b. Added <x> to:
+        - <def-list> by way of -%def-list-model;
+        - <def-item> by way of -%def-item-model;
+ 
+  3. RENAMED CLASSES
+     ### Customization Alert ###
+     Not all classes ended in the ".class" suffix. Changed the 
+     following to add the class suffix:
+     - %display-back-matter.class; used in -%preformat-elements;
+     - %address-elements; (renamed -%address.class;!) used in:
+          - %aff-elements; 
+          - %corresp-elements; 
+          - %publisher-loc-elements;
+     - %contrib-info.class; used in -%contrib-group-model;
+     - %block-math.class; used in 
+          - %named-content-elements; 
+          - %term-elements;
+     - %rest-of-para.class;
+          Inside the content model for Paragraph <p>, was renamed 
+          %p-elements;. The content model for Named Content 
+          and the model for %p-elements; still use
+          %rest-of-para.class;.
+
+  2. INLINE PARAMETER MIXES
+     ### Customization Alert ###
+     INLINE FORMULA/DISPLAY FORMULA/PREFORMAT/RELATED ARTICLE - 
+     Changed the "-element" Parameter Entities to use the 
+     OR-bar-first mechanism:
+        - Inline Formula - In the PE %inline-formula-elements;
+          Changed the PE "%all-phrase;" to "| %all-phrase;"  (Since
+          the OR bar following the #PCDATA in the content model 
+          had been changed to match.) 
+        - Display Formula (%disp-formula-elements; 
+             %disp-formula-model;)
+        - Preformat Elements (%preformat-elements; %preformat-model;)
+        - Related Article (%related-article-elements;)
+                
+  1. Created this module as version "v2.0 20040830"                -->
+
+
+<!-- ============================================================= -->
+<!--                    INLINE MIXES TO OVER-RIDE CONTENT MODELS   -->
+<!--                    (ELEMENTS TO BE ADDED TO #PCDATA IN MODELS)-->
+<!-- ============================================================= -->
+
+
+<!--                    ABBREVIATION ELEMENTS                      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <abbrev> element                       -->
+<!ENTITY % abbrev-elements
+                        "| %all-phrase; | %def.class;"               >
+
+
+<!--                    ACCESS DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Access Date <access-date> element      -->
+<!ENTITY % access-date-elements 
+                        "| %date-parts.class; | %x.class;"           >
+
+
+<!--                    AFFILIATION ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <aff> element                          -->
+<!ENTITY % aff-elements "| %address.class; | %all-phrase; | 
+                           %break.class; | %label.class; | 
+                           %x.class;"                                > 
+
+
+<!--                    CHEMICAL STRUCTURE ELEMENTS                -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Chemical Structure
+                        <chem-struct>                              -->
+<!ENTITY % chem-struct-elements
+                        "| %access.class; |  %all-phrase; | 
+                         %break.class; | %id.class; | 
+                         %label.class; | %list.class; | 
+                         %simple-display.class;"                     >
+
+
+<!--                    CITATION ELEMENTS                          -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Citation               -->
+<!ENTITY % citation-elements   
+                        "| %article-link.class; | %appearance.class; | 
+                         %emphasis.class;  | %inline-display.class; | 
+                         %inline-math.class; | %label.class; |
+                         %math.class; |  %phrase.class; | 
+                         %references.class; | %simple-link.class; | 
+                         %subsup.class; |  %x.class;"                > 
+                         
+                         
+<!--                    COLLABORATIVE (GROUP) AUTHOR ELEMENTS      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <collab> element                       -->
+<!ENTITY % collab-elements 
+                        "| %all-phrase; | %break.class; | %x.class;" > 
+
+
+<!--                    CONFERENCE DATE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <conf-date> element                    -->
+<!ENTITY % conf-date-elements 
+                        "| %date-parts.class; | %x.class;"           > 
+
+
+<!--                    COPYRIGHT STATEMENT ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <copyright-statement>                  -->
+<!ENTITY % copyright-statement-elements 
+                        "| %all-phrase; "                            > 
+
+
+<!--                    CORRESPONDENCE INFORMATION ELEMENTS        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the correspondence information.            -->
+<!ENTITY % corresp-elements 
+                        "| %address.class; | %all-phrase; | 
+                           %break.class; | %label.class; | %x.class;">
+
+
+<!--                    FORMULA, DISPLAY ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <disp-formula>                         -->
+<!ENTITY % disp-formula-elements  
+                        "| %all-phrase; | %access.class; | 
+                         %break.class; | %label.class; |
+                         %simple-display.class;"                     > 
+
+
+<!--                    EMAIL ADDRESS ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <email> element                        -->
+<!ENTITY % email-elements 
+                        "| %all-phrase;"                             > 
+
+
+<!--                    EXTERNAL LINK ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <ext-link>                              -->
+<!ENTITY % ext-link-elements
+                        "| %all-phrase;"                             > 
+
+
+<!--                    FORMULA, INLINE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <inline-formula> element.              -->
+<!ENTITY % inline-formula-elements   
+                        "| %all-phrase;"                             > 
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL ELEMENTS     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <inline-supplementary-material> element-->
+<!ENTITY % inline-supplementary-material-elements 
+                        "| %access.class; | %all-phrase;"      > 
+
+
+<!--                    INSTITUTION NAME ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <institution> element                  -->
+<!ENTITY % institution-elements 
+                        "| %all-phrase; | %break.class; |  
+                         %x.class;"                                  > 
+
+
+<!--                    ISSUE TITLE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <issue-title> element                  -->
+<!ENTITY % issue-title-elements 
+                        "| %all-phrase;"                             > 
+
+
+<!--                    KEYWORD CONTENT ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a keyword.                                 -->
+<!ENTITY % kwd-elements
+                        "| %break.class; | %all-phrase;"             > 
+
+
+<!--                    LABEL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <label> element                        -->
+<!ENTITY % label-elements 
+                        "| %break.class; | %all-phrase;"             >
+
+
+<!--                    LINK ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        linking element such as <xref>, <target>, 
+                        and <ext-link>                             -->
+<!ENTITY % link-elements 
+                        "| %break.class; | %all-phrase;"             > 
+
+
+<!--                    METADATA DATA NAME ELEMENTS                -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <meta-name> element                    -->
+<!ENTITY % meta-name-elements
+                        "| %all-phrase;"                             > 
+
+
+<!--                    METADATA DATA VALUE ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <meta-value> element                   -->
+<!ENTITY % meta-value-elements
+                        "| %all-phrase;"                             > 
+
+
+<!--                    NAMED CONTENT ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <named-content> element                -->
+<!ENTITY % named-content-elements
+                        "| %all-phrase; | %block-display.class; | 
+                           %block-math.class; | %list.class; | 
+                           %rest-of-para.class;"                     >
+
+
+<!--                    PARAGRAPH ELEMENTS                         -->
+<!--                    Elements that may be used within a paragraph
+                        in a mixed content model with #PCDATA.
+                        DESIGN NOTE: There is a major overlap between
+                        this parameter entity and the mix for elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a 
+                        paragraph, but block elements such as quotes 
+                        and lists may appear either within a 
+                        paragraph or at the same level as a 
+                        paragraph. This serves a requirement in a 
+                        repository DTD, since some incoming material 
+                        will have restricted such elements to only 
+                        inside a paragraph, some incoming material 
+                        will have restricted them to only outside a 
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.                      -->
+<!ENTITY % p-elements   "| %all-phrase; | %block-display.class; | 
+                         %block-math.class; | %citation.class; | 
+                         %list.class; | %rest-of-para.class;"        >
+
+
+<!--                    PREFORMATTED TEXT ELEMENTS                 -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the content model for the
+                        <preformat> element, in which white space,
+                        such as tabs, line feeds, and spaces will
+                        be preserved.                              -->
+<!ENTITY % preformat-elements
+                        "| %access.class; | %all-phrase; |
+                         %display-back-matter.class; "               >
+
+
+<!--                    PRODUCT ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <product> element                      -->
+<!ENTITY % product-elements   
+                        "| %article-link.class; |
+                         %appearance.class; | %break.class; |
+                         %emphasis.class; |
+                         %inline-display.class; | 
+                         %inline-math.class; | %math.class; |  
+                         %phrase.class; |  %references.class; |
+                         %simple-link.class; | %subsup.class; | 
+                         %x.class;"                                  >
+                         
+<!--                    PUBLISHER'S LOCATION ELEMENTS              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <publisher-loc> element                -->
+<!ENTITY % publisher-loc-elements 
+                        "| %address.class; | %all-phrase; | 
+                         %break.class; | %x.class;"                  > 
+
+
+<!--                    RELATED ARTICLE ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <related-article> element.             -->
+<!ENTITY % related-article-elements 
+                        "| %article-link.class; | 
+                         %appearance.class; | %break.class; |
+                         %emphasis.class; |
+                         %inline-display.class; | 
+                         %inline-math.class; | %math.class; |  
+                         %phrase.class; | %references.class; | 
+                         %simple-link.class; | %subsup.class; | 
+                         %x.class;"                                  >
+                         
+
+<!--                    SELF-URI ELEMENTS                          -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <self-uri> element                     -->
+<!ENTITY % self-uri-elements
+                        "| %all-phrase;"                             >
+
+
+<!--                    SOURCE ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <source> element                       -->
+<!ENTITY % source-elements
+                        "| %all-phrase; | %break.class;"             > 
+
+<!--                    SPEAKER ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a speaker.                                 -->
+<!ENTITY % speaker-elements
+                        "| %all-phrase; | %person-name.class;"       >
+
+
+<!--                    STRING DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-date> element                  -->
+<!ENTITY % string-date-elements 
+                        "| %all-phrase; | %date-parts.class; | 
+                         %x.class;"                                  >
+                        
+                        
+<!--                    STRING NAME ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-name> element                  -->
+<!ENTITY % string-name-elements 
+                        "| %all-phrase; | %person-name.class; |
+                         %x.class;"                                  >
+
+
+<!--                    STRUCTURAL TITLE ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <title> element                        -->
+<!ENTITY % struct-title-elements 
+                        "| %all-phrase; | %break.class; | %x.class;" > 
+
+
+<!--                    SUBJECT GROUPING NAME ELEMENTS             -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <subject> element                          -->
+<!ENTITY % subject-elements
+                        "| %all-phrase; | %break.class; | %x.class;" > 
+
+
+<!--                    DEFINITION LIST: TERM ELEMENTS             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <term>.                                  -->
+<!ENTITY % term-elements
+                        "| %all-phrase; | %block-math.class; | 
+                         %simple-display.class;"                     >
+
+
+<!--                    TITLE ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        title elements such as <title>, <subtitle>, 
+                        <trans-title>, etc.                        -->
+<!ENTITY % title-elements   
+                        "| %all-phrase; | %break.class;"             > 
+
+
+<!-- ============================================================= -->
+<!--                    OVER-RIDES OF CONTENT MODELS (FULL MODELS) -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE METADATA MODEL                     -->
+<!--                    Full content model for the metadata that is
+                        specific to the article.
+                        Note: This includes both metadata that 
+                        directly describes the article (such as the 
+                        article title, abstract, or article ID) as 
+                        well as the metadata that many MAJOUR-style 
+                        DTDs (such DTDs split the metadata into three
+                        categories: journal metadata, article
+                        metadata, and issue metadata), call the issue
+                        metadata.
+                        Related Element: Metadata specific to the
+                        journal is within the element <journal-meta> 
+                        Journal Metadata                           -->
+<!ENTITY % article-meta-model  
+                        "(article-id*, article-categories?, 
+                         title-group?, 
+                         (contrib-group | aff | %x.class;)*, 
+                         author-notes?, pub-date*,
+                         volume?, volume-id*,
+                         issue?, issue-id*, issue-title*,  
+                         supplement?, 
+                         ( (fpage, lpage?, page-range?) | 
+                            elocation-id )?, 
+                         (%address-link.class; | product | 
+                          supplementary-material)*, 
+                         history?, copyright-statement?, 
+                         copyright-year?, license?,  
+                         self-uri*, related-article*, abstract*, 
+                         trans-abstract*, kwd-group*,
+                         contract-num*, contract-sponsor*, 
+                         conference*, counts?, custom-meta-wrap?)"   >
+
+
+<!--                    CONTRIBUTOR GROUP MODEL                    -->
+<!--                    Content model for the <title-group> element-->
+<!ENTITY % contrib-group-model   
+                        "(contrib+, 
+                          (%contrib-info.class; | %x.class;)* )"     > 
+             
+
+<!--                    CONTRIBUTOR MODEL                          -->
+<!--                    Content model for the <contrib> element    -->
+<!ENTITY % contrib-model  
+                        "( (%name.class;)*, 
+                           (%degree.class; | %contrib-info.class; | 
+                            %x.class;)* )"                           >
+
+
+<!--                    DEFINITION LIST: DEFINITION ITEM MODEL     -->
+<!--                    The content model of a <def-item>          -->
+<!ENTITY % def-item-model 
+                        "(label?, term*, (%def.class; | %x.class;)* )"
+                                                                     >
+
+<!--                    DEFINITION LIST MODEL                      -->
+<!--                    Content model for the <def-list> element   -->
+<!ENTITY % def-list-model   
+                        "(label?, title?, term-head?, def-head?, 
+                          (def-item | %x.class;)*, def-list* )"      > 
+
+
+<!--                    HISTORY ELEMENTS                           -->
+<!--                    Elements that may be mixed with data 
+                        characters inside the model for <history>
+                        when <history> is modeled as a mixed content
+                        element.                                   -->
+<!ENTITY % history-elements   
+                        "| %all-phrase; | %break.class; |
+                          %date.class; | %x.class;"                  >
+
+
+<!--                    HISTORY MODEL                              -->
+<!--                    The content model for the <history> element
+                        (DESIGN NOTE: This content model is a full
+                        model not just an OR list of elements, because
+                        the model it is replacing is an element
+                        model not a mixed-content model.)          -->
+<!ENTITY % history-model   
+                        "(#PCDATA %history-elements;)*"              >
+
+
+<!--                    KEYWORD GROUP MODEL                        -->
+<!--                    Content model for a <kwd-group> element    -->
+<!ENTITY % kwd-group-model
+                        "(title?, (%kwd.class; | %x.class;)+ )"      > 
+
+
+<!--                    PERSON GROUP MODEL                         -->
+<!--                    Content model for the Person Group element -->
+<!ENTITY % person-group-model
+                        "(aff | etal | %name.class; | %x.class;)*"     >
+
+
+<!-- ============================================================= -->
+<!--                    OVER-RIDES OF ATTRIBUTE LISTS              -->
+<!-- ============================================================= -->
+                                                                
+                                                                 
+<!--                    ARTICLE IDENTIFIER ATTRIBUTES              -->
+<!--                    Attributes for the <article-id> element
+             pub-id-type
+                        Publication (article) Identifier Type
+                        Names the type of identifier, or the 
+                        organization or system that defined this 
+                        identifier for the identifier of the journal 
+                        article or a cited publication. This is an
+                        optional CDATA attribute that should be used
+                        whenever the type is known.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pubid> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Suggested values include:
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                          doi    - Digital Object Identifier
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    http://pubs.acs.org/epub/piius.htm
+                                   or 
+                                    http://www.aip.org/epub/piipr.html
+                          pmid   - PubMed ID (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id 
+                                 - Publisher's identifier such 
+                                   as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   'pub-id', etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ENTITY % article-id-atts
+            "pub-id-type
+                        CDATA                              #IMPLIED" >
+
+
+<!--                    DATE (HISTORICAL) ATTRIBUTES               -->
+<!--         date-type  Attribute should only be used if the type
+                        is known, otherwise omit the attribute. 
+                        Suggested values include:
+                          accepted    - Date manuscript was 
+                                        accepted         
+                          received    - Date manuscript received
+                          rev-request - Date revisions were 
+                                        requested or manuscript 
+                                        was returned
+                          rev-recd    - Date revised manuscript 
+                                        was received               -->
+<!ENTITY % date-atts
+             "date-type CDATA                              #IMPLIED" >
+                                                                
+                                                                 
+<!--                    PUBLICATION IDENTIFIER ATTRIBUTES          -->
+<!--                    Attributes for the <pub-id> element        -->
+<!ENTITY %  pub-id-atts  
+             "pub-id-type 
+                        CDATA                             #IMPLIED"  >
+
+
+<!--                    X(CROSS) REFERENCE ATTRIBUTES              -->
+<!--                    Attribute list for cross references        -->
+<!ENTITY %  xref-atts
+             "id         ID                               #IMPLIED
+              ref-type   CDATA                            #IMPLIED 
+              rid        IDREFS                           #IMPLIED"  >
+              
+              
+<!-- ================== End Archiving Content/ATT Over-rides ===== -->
diff --git a/dtd/archivecustom-modules.ent b/dtd/archivecustom-modules.ent
new file mode 100644
index 0000000..729d75c
--- /dev/null
+++ b/dtd/archivecustom-modules.ent
@@ -0,0 +1,116 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Archiving DTD-Specific Modules            -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Journal Archiving DTD-Specific Modules v2.0 20040830//EN"
+     Delivered as file "archivecustom-modules.ent"                 -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    To name any modules created explicitly for this   -->
+<!--             DTD, that is, not present in the Archiving and    -->
+<!--             Interchange DTD Suite                             -->
+<!--                                                               -->
+<!-- CONTAINS:   1)  Full external Parameter Entity declarations   -->
+<!--                 for all DTD-specific modules (Note: the       -->
+<!--                 modules are declared here but referenced in   -->
+<!--                 the DTD.)                                     -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             B. Tommie Usdin (Mulberry Technologies, Inc.)     -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+                
+  1. Created this module as version "v2.0 20040830"                -->
+
+
+<!-- ============================================================= -->
+<!--                    CUSTOMIZATION MODULES DECLARED             -->
+<!-- ============================================================= -->
+
+
+<!--                    DTD-SPECIFIC CLASS CUSTOMIZATIONS MODULE   -->
+<!--                    Set up the Parameter Entities and element
+                        class definitions that will be used to
+                        over-ride some element classes in the
+                        DTD Suite.                                 -->
+<!ENTITY % archivecustom-classes.ent 
+                        PUBLIC  
+"-//NLM//DTD Journal Archiving DTD Customize Classes Module v2.0 20040830//EN"
+"archivecustom-classes.ent"                                          >
+
+
+<!--                    DTD-SPECIFIC MIX CUSTOMIZATIONS MODULE     -->
+<!--                    Set up the Parameter Entities and element
+                        mix definitions that will be used to
+                        over-ride some element mixes in the DTD
+                        Suite.                                     -->
+<!ENTITY % archivecustom-mixes.ent 
+                        PUBLIC  
+"-//NLM//DTD Journal Archiving DTD Customize Mixes Module v2.0 20040830//EN"
+"archivecustom-mixes.ent"                                            >
+
+
+<!--                    DTD-SPECIFIC MODELS/ATTRIBUTES CUSTOMIZATIONS 
+                        MODULE                                     -->
+<!--                    Set up the Parameter Entities for element-
+                        specific element groups, complete content 
+                        models, and attribute list and value over-
+                        rides. These PEs will over-ride selected
+                        content models and attribute lists for the 
+                        Journal Archiving and Interchange DTD Suite-->
+<!ENTITY % archivecustom-models.ent 
+                        PUBLIC  
+"-//NLM//DTD Journal Archiving DTD Customize Content and Attributes Module v2.0 20040830//EN"
+"archivecustom-models.ent"                                           >
+
+
+<!-- =================== End Archive DTD Module of Modules ======= -->
diff --git a/dtd/articlemeta.ent b/dtd/articlemeta.ent
new file mode 100644
index 0000000..9bb3be2
--- /dev/null
+++ b/dtd/articlemeta.ent
@@ -0,0 +1,1811 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Article Metadata Elements                 -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Journal Article Metadata Elements v2.0 20040830//EN"
+     Delivered as file "articlemeta.ent"                           -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements used to describe the journal   --> 
+<!--             in which the journal article is published.        -->
+<!--                                                               -->
+<!-- CONTAINS:   1. Article element parameter entity               -->
+<!--             2. Article metadata elements in alphabetical      -->
+<!--                order                                          -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+ 13. CONTRACT NAME/CONTRACT SPONSOR ATTRIBUTES - Added new attributes
+     to both these elements through a new PE %contract-atts;:
+      - id  (ID)
+      - rid (IDREFS)
+      - %might-link-atts;
+
+ 12. ROLE ELEMENT
+     a. Added to the model for <citation>
+     b. Therefore the element declaration for <role> was
+        moved from this module into the common module.
+
+ 11. DEFAULT ARTICLE-META-MODEL - Added the following 
+     elements to -%article-meta-model;:
+     Existing elements:
+        - <email>
+     New elements:
+       - <license> (for now, just a bucket into which to
+         dump license-related material until the AIT Workgroup
+         does more analysis
+       - <issue-id> (existing <issue> means issue number)
+       - <issue-title> (for special title or theme)
+       - <page-range>
+       - <volume-id> (existing <volume> means volume number)
+       - <custom-meta-wrap> Which is a wrapper element used to hold
+         name/value pairs for metadata elements that are in source
+         material but were never envisioned by this DTD.
+
+ 10. CONTRIBUTOR / CONTRIBUTOR GROUP
+     a. Made model into Parameter Entity %contrib-model;
+     b. Allowed <string-name> as an alternative to <name>
+     c. Allowed <degrees> to follow either <name> or 
+        <string-name>
+     d. Moved <etal> to %contrib-info.class; to solve \
+        classing problems
+     e. Added footnote <fn> to %contrib-info.class;
+
+  9. STRING NAME
+     a. Created a new element <string-name> for names that
+        do not follow the former, strict personal name model.
+
+     b. Allowed <string-name> to be used anywhere <name> is
+        used. Inside
+         - <product> (by adding to %references.class; used in 
+           %product-elements;)
+         - <contrib> (by adding to %name.class; used in 
+           %contrib-model;)
+
+  8. DOI - added to elements by request of AIT WG. Elements with
+     DOIs are those a publisher could expect to sell or handle
+     separately. DOI added to: (using <object-id> element)
+      - <abstract> (through %abstract-model;)
+
+  7. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Added internal parenthesis to Parameter Entity and removed 
+     them from Element Declaration for:
+     - %abstract-model;
+     - %article-meta-model;
+     - %author-notes-model;
+     - %contrib-group-model;
+     - %contrib-model;
+     - %counts-model;
+     - %date-model;
+     - %title-group-model;
+     - %trans-abstract-model;
+ 
+  6. RENAMED CONTENT MODEL PARAMETER ENTITY
+     ### Customization Alert ###
+     - %author-notes-elements; ==> -%author-notes-model;
+
+  5. PARAMETER ENTITIES FOR CLASSES/MIXES/ATT LISTS
+     a. RENAMED CLASSES
+        ### Customization Alert ###
+         Not all class names ended in the ".class" suffix. 
+         Changed the following to add that suffix:
+         - %address-elements; (renamed -%address.class;!)
+               used in -%corresp-elements; 
+         - %contrib-info.class; used in -%contrib-group-model; 
+               and in -%contrib-model;
+         - %inline-math.class; used in -%subject-elements;
+               and in -%kwd-elements; (via %all-phrase;)
+
+     b. DEFAULT CLASSES - Were moved from this module to 
+        the module -%default-classes.ent;
+
+     c. NEW PARAMETER ENTITIES - To correct potential classing 
+        problems,  new Parameter Entities were created. The following
+        PEs and models were changed to use these new PEs:
+             New Content model PEs:
+        - %date.class;        in %history-elements; 
+        - %kwd.class;         in %kwd-group-model;
+        - %just-para.class;   in <author-comment>
+        
+        - %author-comments;   in <author-comments>
+        - %contrib-model;     in <contrib>
+        - %history-model;     in <history>      
+        - %kwd-group-model;   in <kwd-group>
+        
+        - In <author-notes> "(corresp | fn)+" was replaced
+          with the %fn-link.class; and the new class
+          -%corresp.class;)
+
+              New Attribute List PEs:
+        - %article-id-atts;  for <article-id>
+
+              New mix PEs
+        - %degrees-elements;      in <degrees>        
+        - %on-behalf-of-elements; in <on-behalf-of>
+        - %self-uri-elements; in <self-uri>  
+        - %series-text-elements;  in <series-text>  
+        - %series-title-elements; in <series-title>
+
+     d. LINK CLASSES -  Replaced %link.class; in the PE
+        -%product-elements; with the following classes 
+        (no DTD change, just parameterization):
+         - %simple-link.class;  (the internal links, same)
+         - %article-link.class; (links for journal article)
+  
+  4. Updated public identifier to "v2.0 20040830"
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+      
+  3. Added element <label> to content model of element <author-notes>
+     (via %author-notes-elements;) 
+     Rationale: To allow label as a format override
+  
+  2. Created parameter entity %author-notes-elements; to hold 
+     contents of <author-notes>
+     Rationale: In order to distinguish between models used by
+     the Archiving DTD and the Publishing DTD, it was necessary 
+     to create a parameter entity that could be overridden.
+     
+  1. Added parameter entity %label.class; to parameter 
+     %corresp-elements;  
+     Rationale: To allow label as a format override
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                                 Classes and Mixes
+                        - %address.class; 
+                        - %break.class; 
+                        - %conference.class;
+                        - %contrib-info.class;
+                        - %emphasis.class; 
+                        - %inline-display.class;
+                        - %inline-math.class;
+                        - %just-rendition;
+                        - %references.class;
+                        - %rendition-plus;
+                        - %simple-link.class;
+                        - %simple-phrase;
+                        - %simple-text;
+                        - %subsup.class;
+                        - %title-elements;
+                                Complete Content Models
+                        - %article-meta-model;
+                        - %date-model; 
+                        - %sec-opt-title-model; 
+                                 Attribute Values
+                        - %pub-id-types;         
+                                 Attribute Lists
+                        - %might-link-atts; 
+                                                                   -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE VALUES    -->
+<!-- ============================================================= -->
+
+
+<!--                    PUBLICATION TYPES                          -->
+<!--                    Used to record the type of publication, for
+                        example a print-only publication versus
+                        an electronic-only publication, in any of
+                        several life stages.
+                          This Parameter Entity is intended to name
+                        the values of the "pub-type" attribute, but
+                        in Version 1.0 of this DTD Suite, the 
+                        "pub-type" attribute is defined with a
+                        Declared Value of CDATA and this Parameter
+                        Entity is not used or provide its values.
+                        Suggested values include:
+                          epub        - Electronic publication
+                          ppub        - Print publication
+                          epub-ppub   - Published in both print and
+                                        electronic form
+                          epreprint   - Electronic preprint 
+                                        dissemination    
+                          ppreprint   - Print preprint dissemination
+                          ecorrected  - Corrected in electronic    
+                          pcorrected  - Corrected in print     
+                          eretracted  - Retracted in electronic    
+                          pretracted  - Retracted in print         -->
+<!ENTITY % pub-types    "epub | ppub | epub-ppub | epreprint |
+                         ppreprint | ecorrected | pcorrected | 
+                         eretracted | pretracted"                    >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+                                                                
+                                                                 
+<!--                    ABSTRACT ATTRIBUTES                        -->
+<!--                    Attributes for the <abstract> element and
+                        the <trans-abstract> element               -->
+<!ENTITY % abstract-atts
+            "abstract-type   
+                        CDATA                              #IMPLIED
+             xml:lang   NMTOKEN                            #IMPLIED" > 
+                                                                
+                                                                 
+<!--                    ALTERNATE TITLE ATTRIBUTES                 -->
+<!--                    Attributes for the <alt-title> element     -->
+<!--         alt-title-type
+                        Why this title was created, for example,
+                        "short" for a short version of the title,
+                        "toc" for use in a Table of Contents, "ASCII" 
+                        for an ASCII title, "right-running" for
+                        a right-running-head title, etc.           -->
+<!ENTITY % alt-title-atts
+            "alt-title-type
+                        CDATA                              #IMPLIED" >
+                                                                
+                                                                 
+<!--                    ARTICLE IDENTIFIER ATTRIBUTES              -->
+<!--                    Attributes for the <article-id> element
+             pub-id-type
+                        Publication (article) Identifier Type
+                        Names the type of identifier, or the 
+                        organization or system that defined this 
+                        identifier for the identifier of the journal 
+                        article or a cited publication.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pubid> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Valid Types include:
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                          doi    - Digital Object Identifier
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    http://pubs.acs.org/epub/piius.htm
+                                   or 
+                                    http://www.aip.org/epub/piipr.html
+                          pmid   - PubMed ID (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id 
+                                 - Publisher's identifier such 
+                                   as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   'pub-id', etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ENTITY % article-id-atts
+            "pub-id-type
+                        (%pub-id-types;)                   #IMPLIED" >
+                                                                
+                                                                 
+<!--                    CONTRACT ATTRIBUTES                        -->
+<!--                    Attributes for the <contract-num> element and
+                        the <contract-sponsor> element            
+             id         Unique identifier, so the contributor can be
+                        referenced
+             rid        May be used to point to, for example, link
+                        contract numbers and sponsors
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename associated with
+                        a grant or sponsor                         -->
+<!ENTITY % contract-atts
+            "id         ID                                 #IMPLIED
+             rid        IDREFS                             #IMPLIED
+             %might-link-atts;"                                      >
+
+                                                                 
+<!--                    CONTRIBUTOR ATTRIBUTES                     -->
+<!--                    Attributes for the Contributor <contrib> 
+                        element                                    -->
+<!--         contrib-type
+                        What was the contribution of this person,
+                        for example: author, editor, contributor,
+                        translator, illustrator, designer, 
+                        research assistant, etc.                 
+             id         Unique identifier, so the contributor can be
+                        referenced
+             corresp    Corresponding Author (Set to 'yes' if this 
+                        contributor is a corresponding author.)
+             equal-contrib    
+                        Contributed equally (Set to 'yes' if all 
+                        contributors contributed equally.)
+             deceased   Deceased (Set to 'yes' if the contributor
+                        has died.)                           
+             rid        May be used to point to information concerning
+                        the contributor, for example to the <corresp>
+                        Corresponding Information element.  There
+                        is no limit to the number of contributors 
+                        that can be designated as corresponding.
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ENTITY % contrib-atts
+            "contrib-type       
+                        CDATA                              #IMPLIED  
+             id         ID                                 #IMPLIED
+             corresp    (no | yes)                         #IMPLIED        
+             equal-contrib 
+                        (no | yes)                         #IMPLIED  
+             deceased   (no | yes)                         #IMPLIED 
+             rid        IDREFS                             #IMPLIED  
+             %might-link-atts;                                     " >
+             
+             
+<!--                    CUSTOM METADATA ATTRIBUTES                 -->
+<!--                    Attributes for the <custom-meta> element   -->
+<!ENTITY % custom-meta-atts
+            "used-by    CDATA                              #IMPLIED
+             %might-link-atts;"                                      >
+                                                                
+                                                                 
+<!--                    KEYWORD GROUP ATTRIBUTES                   -->
+<!--                    Attributes for the <kwd-group> element     -->
+<!ENTITY % kwd-group-atts
+            "id         ID                                 #IMPLIED 
+             kwd-group-type  
+                        CDATA                              #IMPLIED
+             xml:lang   NMTOKEN                            #IMPLIED" >
+                                                                
+                                                                 
+<!--                    LICENSE ATTRIBUTES                         -->
+<!--                    Attributes for the <license> element    
+             license-type
+                        xxx ask Jeff xxx
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ENTITY % license-atts
+            "license-type  
+                        CDATA                              #IMPLIED
+             %might-link-atts;"                                      >
+                                                                
+                                                                 
+<!--                    PRODUCT ATTRIBUTES                         -->
+<!--                    Attributes for the Product <product> 
+                        element                                    -->
+<!--         product-type
+                        Type of product being reviewed, for example:
+                        book, software package, journal or journal
+                        issue, website, film, hardware component,
+                        etc.
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ENTITY % product-atts
+            "product-type 
+                        CDATA                              #IMPLIED           
+             %might-link-atts;"                                      >
+
+                                                                 
+<!--                    PUBLICATION DATE ATTRIBUTES                -->
+<!--                    Attributes for the <pub-date> element      -->
+<!--                    Used to record the type of publication, for
+                        example a print-only publication versus
+                        an electronic-only publication, in any of
+                        several life stages.
+                        Suggested values include: 
+                          epub        - Electronic publication
+                          ppub        - Print publication
+                          epub-ppub   - Published in both print and
+                                        electronic form
+                          epreprint   - Electronic preprint 
+                                        dissemination    
+                          ppreprint   - Print preprint dissemination     
+                          ecorrected  - Corrected in electronic    
+                          pcorrected  - Corrected in print     
+                          eretracted  - Retracted in electronic    
+                          pretracted  - Retracted in print     
+                                                                   -->
+<!ENTITY % pub-date-atts
+            "pub-type   CDATA                              #IMPLIED" >
+
+
+<!--                    SUBJECT GROUP ATTRIBUTES                   -->
+<!--                    Attributes for the <subj-group> element    -->
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   
+             subj-group-type
+                        Identification of the subject, information
+                        class, or type of this particular subject
+                        group                                      -->
+<!ENTITY % subj-group-atts
+            "xml:lang   NMTOKEN                            #IMPLIED 
+             subj-group-type
+                        CDATA                              #IMPLIED" > 
+
+
+<!--                    SUPPLEMENT ATTRIBUTES                      -->
+<!--                    Attributes for the <supplement> element    -->
+<!--        supplement-type   
+                        Indicates what sort of supplement, if the
+                        for example: "issue" meaning a supplement to 
+                        a particular journal issue; "conference", 
+                        meaning the supplement contains information 
+                        from a conference, symposium, or other 
+                        gathering; "periodic" for supplements issued  
+                        at regular intervals, etc.                 -->
+<!ENTITY % supplement-atts
+            "supplement-type   
+                        CDATA                              #IMPLIED" >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA                           -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE METADATA MODEL                     -->
+<!--                    Complete content model for the <article-meta>
+                        element, which names the journal article
+                        metadata                                   -->
+<!ENTITY % article-meta-model  
+                        "(article-id*, article-categories?, 
+                         title-group?, (contrib-group | aff)*, 
+                         author-notes?, pub-date*, 
+                         volume?, volume-id*, 
+                         issue?, issue-id*, issue-title*,  
+                         supplement?, 
+                         ( (fpage, lpage?, page-range?) | 
+                            elocation-id )?, 
+                         (%address-link.class; | product |
+                          supplementary-material)*, 
+                         history?, copyright-statement?, 
+                         copyright-year?, license?, 
+                         self-uri*, related-article*, abstract*, 
+                         trans-abstract*, kwd-group*,
+                         contract-num*, contract-sponsor*,
+                         conference*, counts?, custom-meta-wrap?)"   >
+
+
+<!--                    ARTICLE METADATA                           -->
+<!--                    Metadata that identifies this article, for
+                        example, bibliographic information such as
+                        the title, author, and copyright year.     -->
+<!ELEMENT  article-meta %article-meta-model;                         >
+
+
+<!--ELEM   copyright-statement
+                        Defined in %common.ent"                    -->
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE IDENTIFICATION                     -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE IDENTIFIER                         -->
+<!--                    Optional element, used to hold one of the
+                        "unique identifiers" that have been assigned
+                        at various times to an article.  Such
+                        identifiers may come from the publisher, the
+                        jobber, or from inside PMC. Examples of such
+                        numbers are the publishers tracking number,
+                        the PNAS number, etc. PMC tries to carry 
+                        all identifiers associated with an article,
+                        whether they came in as elements or attributes
+                        on the original article.
+                          The "type attribute" should only be used if
+                        the type is known, for example, to identify
+                        DOIs.
+                          REMARKS: The <article-id> element is one
+                        of three elements used to provide an element
+                        identifier (such as a DOI). The <article-id>
+                        holds an identifier for Articles. The 
+                        <pub-id> element holds an identifier for  
+                        cited publications, such as a journal article
+                        listed inside the bibliographic reference 
+                        list <ref-list>. The <object-id> holds an
+                        identifier for an object such as a Figure or
+                        sidebar <boxed-text>. All three elements
+                        take the "pub-id-type" attribute.          -->
+<!ELEMENT  article-id   (#PCDATA)                                    >
+<!--         pub-id-type
+                        Publication (article) Identifier Type
+                        Names the type of identifier, or the 
+                        organization or system that defined this 
+                        identifier for the identifier of the journal 
+                        article or a cited publication.
+                           Used on the <article-id> element (article
+                        metadata), the <pub-id> element (cited
+                        publications in the reference list), and
+                        in the <object-id> element (used on Figures,
+                        etc. to provide a DOI or other ID).
+                          For the Archiving (Green) DTD, this is a
+                        CDATA attribute with the following types
+                        suggested. Other DTDs may enforce the
+                        types. Valid/suggested types include:
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                          doi    - Digital Object Identifier
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    http://pubs.acs.org/epub/piius.htm
+                                   or 
+                                    http://www.aip.org/epub/piipr.html
+                          pmid   - PubMed ID (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id 
+                                 - Publisher's identifier such 
+                                   as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   'pub-id', etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ATTLIST  article-id  
+             %article-id-atts;                                       >
+             
+
+<!-- ============================================================= -->
+<!--                    ARTICLE GROUPING DATA (ARTICLE METADATA)   -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE GROUPING DATA                      -->
+<!--                    Container for elements that may be used to
+                        group articles into related clusters       -->
+<!ELEMENT  article-categories    
+                        (subj-group*, series-title*, series-text?)   >
+                                                                  
+
+<!--                    GROUPING ARTICLES IN TITLED CATEGORIES
+                        For some journals, articles are grouped into
+                        categories, with the category indicated in
+                        the article's display.
+                        Sometimes the grouping or category refers
+                        to the type of article, such as "Essay",
+                        "Commentary", or "Article".  Sometimes the
+                        grouping refers to subject areas, such as
+                        "Physical Sciences", "Biological Sciences",
+                        or "Social Sciences". Sometimes the grouping 
+                        refers to topics within the larger subject 
+                        areas, such as "Applied Math", "Biology", or 
+                        "Chemistry".
+
+                        In a printed journal as well as on the PMC
+                        website, articles may be grouped or arranged
+                        under these headings (here are all the
+                        Essays, here are all the Biology articles,
+                        etc.) Some journals divide articles into 
+                        three layers of grouping, some into two, and 
+                        some into only one.
+                        For example, a three level grouping might be:
+                         <subj-group>
+                           <subject>Articles</subject>
+                           <subj-group>
+                             <subject>Biological Sciences</subject>
+                             <subj-group>
+                               <subject>Entomology</subject>
+                             </subj-group>
+                           </subj-group>
+                         </subj-group>
+                        And a one-level grouping might be
+                         <subj-group>
+                          <subject>Retraction</subject>
+                         </subj-group>
+                        or, alternatively
+                         <subj-group>
+                          <subject>Essay</subject>
+                         </subj-group>
+                         
+                        Articles may also be assigned to more than 
+                        one grouping. For example, if an article is
+                        classified as "Biochemistry" under 
+                        "Biological Sciences" and "Chemistry" under
+                        "Physical Sciences," the subj-group wrapper
+                        may repeat. 
+                         
+                        For example, 
+                         <subj-group>
+                           <subject>Articles</subject>
+                           <subj-group>
+                             <subject>Biological Sciences</subject>
+                             <subj-group>
+                               <subject>Biochemistry</subject>
+                             </subj-group>
+                           </subj-group>
+                           <subj-group>
+                             <subject>Physical Sciences</subject>
+                             <subj-group>
+                                <subject>Chemistry</subject>
+                             </subj-group>
+                         </subj-group>
+                                                                   -->
+<!ELEMENT  subj-group   (subject+, subj-group*)                      > 
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   
+             subj-group-type
+                        Identification of the subject, information
+                        class, or type of this particular subject
+                        group                                      -->
+<!ATTLIST  subj-group
+             %subj-group-atts;                                       > 
+
+
+<!--                    SUBJECT GROUPING NAME ELEMENTS             -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <subject> element                          -->
+<!ENTITY % subject-elements
+                        "| %emphasis.class; | %inline-display.class; | 
+                         %inline-math.class; | %subsup.class;"       > 
+
+
+<!--                    SUBJECT GROUPING NAME                      -->
+<!--                    The name of one of the subject groups used
+                        to describe an article.  Such groups are
+                        used, typically, to provide headings for
+                        groups of articles in a printed or online
+                        generated Table of Contents.               -->
+<!ELEMENT  subject      (#PCDATA %subject-elements;)*                >
+
+
+<!-- ============================================================= -->
+<!--                    SERIES INFORMATION                         -->
+<!-- ============================================================= -->
+                        
+
+<!--                    GROUPING ARTICLES IN SERIES
+                        Series (as used in the <series-title> and 
+                        <series-text> elements described below) is 
+                        used in two different senses. Some issues of
+                        journals are part of a series and will have
+                        series information just as they have an
+                        issue number as part of the article metadata,
+                        to describe the issue of the journal in which
+                        the article is published.  The second usage
+                        is for groupings of articles within one
+                        issue of a journal. For example, in some 
+                        journals, articles are grouped into a
+                        series such as "From the Cover" and 
+                        identified as part of a series. 
+                        The Series Title element names the series 
+                        and the Series Text element provides textual
+                        description (if any) describing the series.-->
+
+
+<!--                    SERIES TITLE ELEMENTS                      -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <series-title> element                     -->
+<!ENTITY % series-title-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    SERIES TITLE                               -->
+<!--                    Title of the journal series (bibliographic
+                        meaning) or the title of a  series of 
+                        articles internal to one issue of a journal
+                                                                   -->
+<!ELEMENT  series-title (#PCDATA %series-title-elements;)*           >
+
+
+<!--                    SERIES TEXT ELEMENTS                       -->
+<!--                    Elements that may be used, along with data
+                        characters inside the content model of the
+                        <series-text> element                      -->
+<!ENTITY % series-text-elements
+                        "%rendition-plus;"                           >
+    
+
+<!--                    SERIES TEXT: HEADER TEXT to DESCRIBE       -->
+<!--                    Textual description of the series of articles
+                        that are named in a <series-title> element -->
+<!ELEMENT  series-text  (#PCDATA %series-text-elements;)*            >
+
+
+<!-- ============================================================= -->
+<!--                    TOP-LEVEL ARTICLE METADATA CONTINUED       -->
+<!-- ============================================================= -->
+
+
+<!--                    AUTHOR NOTES MODEL                         -->
+<!--                    Content model for an <author-notes> element.
+                                                                   -->
+<!ENTITY % author-notes-model 
+                        "((%label.class;)*, title?, 
+                          (%corresp.class; | %fn-link.class;)+ )"    >
+
+
+<!--                    AUTHOR NOTE GROUP                          -->
+<!--                    Footnotes to authors or notes about authors
+                        (and, potentially other contributors) are
+                        collected in the Author note group.  
+                        References to these footnotes are made 
+                        using the <xref> element.
+                        Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->
+<!ELEMENT  author-notes %author-notes-model;                         >
+<!--         id         Unique identifier so that the note group
+                        may be referenced, for example by an author
+             rid        May be used to point to an author, if the
+                        source has recorded connections in both
+                        directions                                 -->
+<!ATTLIST  author-notes
+             id         ID                                 #IMPLIED  
+             rid        IDREFS                             #IMPLIED  >
+
+
+<!--ELEM   volume       Defined in %common.ent;                    -->
+<!--ELEM   issue        Defined in %common.ent;                    -->
+<!--ELEM   supplement   Defined in %common.ent;                    -->
+<!--ELEM   fpage        Defined in %common.ent;                    -->
+<!--ELEM   lpage        Defined in %common.ent;                    -->
+<!--ELEM   elocation-id Defined in %common.ent;                    -->
+<!--ELEM   ext-link     Defined in %common.ent;                    -->
+<!--ELEM   lpage        Defined in %common.ent;                    -->
+
+
+<!-- ============================================================= -->
+<!--                 PRODUCT REVIEW INFORMATION (PRODUCT METADATA) -->
+<!-- ============================================================= -->
+
+
+<!--                    PRODUCT ELEMENTS                           -->
+<!--                    Elements that may be used inside the 
+                        <product> element                          
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % product-elements   
+                        "%simple-text; | %article-link.class; |  
+                         %break.class; |  %references.class; | 
+                         %simple-link.class;"                        > 
+
+
+<!--                    PRODUCT INFORMATION                        --> 
+<!--                    Used as a wrapper for metadata for a product
+                        (such as a book, software package, hardware
+                        component, website etc.) that is being 
+                        reviewed. 
+                        Authoring and Conversion Note: This element 
+                        should be used when the value of the 
+                        "article-type" attribute on the element 
+                        <article> is "book-review" or 
+                        "product-review".
+                        
+                        Authoring and Conversion Note: A review of 
+                        a book, journal, website, etc. should 
+                        include as much information about the item
+                        being reviewed as is practical, for example:
+                        <product>
+                            <name>
+                              <surname>Lapeyre</surname>
+                              <given-names>Deborah A.</given-names>
+                            </name>
+                            <name>
+                              <surname>Usdin</surname>
+                              <given-names>B. Tommie</given-names>
+                            </name>
+                            <source>Wildflowers of the
+                            Washington Area</source>
+                            <year>2002</year>
+                            <publisher-name>Lippman Ltd.
+                            </publisher-name>
+                            <publisher-loc>Bethesda, MD
+                            </publisher-loc>
+                            <isbn>0-23-8675-309</isbn>, 
+                            includes a CD-ROM, 
+                            <bold>$19.95</bold> (Used 12.50 when
+                            available)
+                         </product>
+                                                                   -->
+<!ELEMENT  product      (#PCDATA %product-elements;)*                >
+<!--         product-type
+                        Type of product being reviewed, for example:
+                        book, software package, journal or journal
+                        issue, website, film, hardware component,
+                        etc.
+              xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ATTLIST  product
+             %product-atts;                                          >
+
+
+<!-- ============================================================= -->
+<!--                    PUBLICATION HISTORY ELEMENTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    HISTORY MODEL                              -->
+<!--                    The content model for the <history> element
+                                                                   -->
+<!ENTITY % history-model   
+                        "(%date.class;)+"                            > 
+
+
+<!--                    HISTORY:  DOCUMENT HISTORY                 -->
+<!--                    Used as a container for dates related to the 
+                        processing history of the document, such as 
+                        received date and accepted date.           
+                        Authoring and Conversion Note: The dates 
+                        inside the <history> element are used to
+                        preserve events other than publication dates
+                        in the lifecycle of the article. Publication
+                        dates are considered to be an important
+                        part of the metadata. History dates include
+                        accepted date, received date, reviewed
+                        date, and other dates that may be important
+                        to the publisher but are not a likely part 
+                        of the article metadata for searching, 
+                        building a DOI, etc.                       -->
+<!ELEMENT  history      %history-model;                              >
+
+
+<!-- ============================================================= -->
+<!--                    FURTHER METADATA ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!--                    COPYRIGHT YEAR                             -->
+<!--                    Year of the copyright. Need not be used, if,
+                        for example, having the year as part of the 
+                        copyright statement is sufficient.
+                        Note: since Copyright Statement is intended
+                        for display, Copyright Year is not expected 
+                        to be displayed (but will be available for 
+                        searching).                                -->
+<!ELEMENT  copyright-year    
+                        (#PCDATA)                                    >
+
+
+<!--                    LICENSE MODEL                              -->
+<!--                    Content model for an <license> element     -->
+<!ENTITY % license-model
+                        "((%just-para.class;)+)"                     > 
+
+
+<!--                    LICENSE INFORMATION                        -->
+<!--                    The set of conditions under which people are
+                        allowed to use this article or other
+                        license-related information or restrictions.
+                        For now, this is a place-holder element
+                        that may change after the AIT Workgroup has
+                        done additional analysis                   -->
+<!ELEMENT  license      %license-model;                              >
+<!ATTLIST  license  
+             %license-atts;                                          >
+
+
+<!--                    SELF-URI ELEMENTS                          -->
+<!--                    Elements to be mixed with data characters
+                        inside the <self-uri> element              -->
+<!ENTITY % self-uri-elements
+                        " "                                          >
+ 
+
+<!--                    URI FOR THIS SAME ARTICLE ONLINE           -->
+<!--                    Sometimes an article is available in several
+                        forms, for example there is the version that
+                        was published in print and there is the same
+                        article (possibly expanded or with different
+                        graphics) available online.              
+                           The URI (such as a URL) may be used as a 
+                        live link, typically naming a website or the 
+                        element content may name the URL, e.g., and
+                        use the link attributes to hold the real link:
+                           <self-uri xlink:href="...">An expanded
+                           version of this article is available
+                           online</self-uri>                       -->
+<!ELEMENT  self-uri     (#PCDATA %self-uri-elements;)*               >
+<!ATTLIST  self-uri 
+             %might-link-atts;                                       >
+
+
+<!--ELEM   related-article       
+                        Defined in %common.ent;                    -->
+
+
+<!-- ============================================================= -->
+<!--                    ABSTRACTS                                  -->
+<!-- ============================================================= -->
+
+
+<!--                    ABSTRACT MODEL                             -->
+<!--                    Content model for an <abstract> element    -->
+<!ENTITY % abstract-model
+                        "((%id.class;)*, %sec-opt-title-model; )"    > 
+
+
+<!--                    ABSTRACT                                   -->
+<!ELEMENT  abstract     %abstract-model;                             >
+<!--         abstract-type   
+                        What type of abstract, for the various
+                        styles of abstracts that publishers
+                        identify, such as:
+                          ASCII        Without special characters or
+                                       equations so it can be sent in
+                                       email or displayed on primitive
+                                       browsers
+                           executive-summary 
+                                       A non-technical summation of
+                                       the major findings of the
+                                       article
+                           graphical   The abstract is a picture
+                           editor      For an abstract written by an
+                                       editor and not the author
+                           key-points  An abstract which is a list of
+                                       the key points made by the 
+                                       document
+                           objectives  Used for Learning Objectives 
+                                       or article objectives
+                           short       An abbreviated form of the
+                                       abstract, for use, for example
+                                       inside a generated Table of
+                                       Contents, or to be returned
+                                       in addition to the article 
+                                       title during a search
+                           stereochemical 
+                                       An abstract containing only
+                                       the details of a chemical
+                                       compound (For example, the
+                                       Elsevier DTD "stereochem")
+                           summary     Summation of the article,
+                                       typically used in conjunction
+                                       with other types of abstracts
+                           teaser      A short abstract specifically
+                                       written to draw the attention
+                                       of the reader
+                           toc         A line or two that displays
+                                       in a table of contents
+                           web-summary
+                                       Short summary intended for
+                                       distribution on a website   -->
+<!ATTLIST  abstract
+             %abstract-atts;                                         >
+
+
+<!--                    TRANSLATED ABSTRACT MODEL                  -->
+<!--                    Content model for an <trans-abstract> element.
+                        The section model include the parentheses. -->
+<!ENTITY % trans-abstract-model
+                        "%sec-opt-title-model;"                      > 
+
+
+<!--                    TRANSLATED ABSTRACT                        -->
+<!--                    An abstract that has been translated into
+                        another language                           -->
+<!ELEMENT  trans-abstract
+                        %trans-abstract-model;                       >
+<!--         abstract-type
+                        What type of abstract, for the various
+                        unusual styles of abstracts that publishers
+                        identify, such as "short" abstract, "graphic"
+                        abstract, "ASCII" abstract, "stereochemical"
+                        abstract, etc.                            
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  trans-abstract
+             %abstract-atts;                                         > 
+
+
+<!-- ============================================================= -->
+<!--                    KEYWORD ELEMENTS                           -->
+<!-- ============================================================= -->
+
+
+<!--                    KEYWORD GROUP MODEL                        -->
+<!--                    Content model for a <kwd-group> element    -->
+<!ENTITY % kwd-group-model
+                        "(title?, (%kwd.class;)+ )"                  > 
+
+
+<!--                    KEYWORD GROUP                              -->
+<!--                    Container element for one set of keywords 
+                        used to describe a document.
+                        Remarks: A document may have multiple sets
+                        of keywords, each with a source named in
+                        the "kwd-group-type" attribute.            -->
+<!ELEMENT  kwd-group    %kwd-group-model;                            >
+<!--         id         Unique identifier so the element may be
+                        referenced                                
+             kwd-group-type  
+                        Name of the source of the keywords, for
+                        example "MESH", "IEEE", "author",
+                        "ICD9-codes", etc.
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German).  These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  kwd-group
+             %kwd-group-atts;                                        >
+
+
+<!--ELEM   title        Defined in %common.ent;                    -->
+
+
+<!--                    KEYWORD CONTENT ELEMENTS                   -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a keyword.                                 -->
+<!ENTITY % kwd-elements
+                        "| %emphasis.class; | %inline-display.class; | 
+                         %inline-math.class; | %simple-link.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    KEYWORD                                    -->
+<!--                    One subject term, critical expression, key
+                        phrase, abbreviation, indexing word, etc. 
+                        that is associated with the whole document
+                        and can be used for identification and 
+                        indexing purposes.
+                        There maybe several sets of keywords,
+                        identified by language or vocabulary source
+                        at the Keyword Group level <kwd-group>.
+                        Conversion Note: Keywords are not allowed to
+                        nest.  There are a few journal DTDs in which
+                        keyword nesting is used to simulate a two-
+                        part list.  These keyword list should be
+                        tagged as definition lists instead.        -->
+<!ELEMENT  kwd          (#PCDATA %kwd-elements;)*                    >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  kwd
+             id         ID                                 #IMPLIED  >
+
+
+<!-- ============================================================= -->
+<!--                    STILL FURTHER ARTICLE METADATA             -->
+<!-- ============================================================= -->
+
+
+<!--                    CORRESPONDENCE INFORMATION ELEMENTS        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the correspondence information.            -->
+<!ENTITY % corresp-elements 
+                        "| %address.class; | %address-link.class;| 
+                         %emphasis.class; | %label.class; | 
+                         %subsup.class;"                             >
+
+
+<!--                    CORRESPONDENCE INFORMATION                 -->
+<!--                    Optional element, used as a container for 
+                        information concerning which of the authors 
+                        (or other contributors) is the corresponding 
+                        contributor, to whom information requests 
+                        should be addressed.
+                        A cross-reference element may point to the
+                        identifier attribute.
+                        Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->
+<!ELEMENT  corresp      (#PCDATA %corresp-elements;)*                >
+<!--         id         Unique identifier, so the element can be
+                        referenced                                 -->
+<!ATTLIST  corresp
+             id         ID                                 #IMPLIED  >
+
+
+<!--                    PUBLICATION DATE                           -->
+<!--                    Date of publication or release of the
+                        material in one particular format.  Inside
+                        the article metadata, the Publication Date
+                        is allowed to repeat, and each date can take 
+                        a "pub-type" attribute to distinguish
+                        which form of release or publication.      -->
+<!ELEMENT  pub-date     %date-model;                                 >
+<!--                    Used to record the type of publication, that
+                        was released or published on this date, for
+                        example a print-only publication versus
+                        an electronic-only publication, in any of
+                        several life stages.
+                        Suggested values include:
+                          epub        - Electronic publication
+                          ppub        - Print publication
+                          epub-ppub   - Published in both print and
+                                        electronic form
+                          epreprint   - Electronic preprint 
+                                        dissemination    
+                          ppreprint   - Print preprint dissemination     
+                          ecorrected  - Corrected in electronic    
+                          pcorrected  - Corrected in print     
+                          eretracted  - Retracted in electronic    
+                          pretracted  - Retracted in print         -->
+<!ATTLIST  pub-date
+             %pub-date-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    CONTRACT/GRANT INFORMATION ELEMENTS        -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRACT/GRANT NUMBER ELEMENTS             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the contract number.  
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % contract-elements 
+                        "%simple-text;"                              >
+
+
+<!--                    CONTRACT/GRANT NUMBER                      -->
+<!--                    Contract or grant number of the supported
+                        work described in the article.
+                        Authoring Conversion Note: If an acronym of
+                        the sponsor is available, it should be
+                        inserted before the number.                -->
+<!ELEMENT  contract-num
+                        (#PCDATA %contract-elements;)*               >
+<!--         id         Unique identifier, so the contributor can be
+                        referenced
+             rid        May be used to point to, for example, link
+                        contract numbers and sponsors
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename associated with
+                        a grant or sponsor                         -->
+<!ATTLIST  contract-num
+             %contract-atts;                                         >
+
+
+<!--                    CONTRACT/GRANT SPONSOR ELEMENTS            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the contract sponsor.         
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an online
+                        mix, the OR bar is already there.          -->
+<!ENTITY % contract-sponsor-elements 
+                        "%simple-text;"                              >
+  
+
+<!--                    CONTRACT/GRANT SPONSOR                     -->
+<!--                    Name of the organization that sponsored the
+                        work described in the article.
+                        proceedings.                               -->
+<!ELEMENT  contract-sponsor
+                        (#PCDATA %contract-sponsor-elements;)*       >
+<!--         id         Unique identifier, so the contributor can be
+                        referenced
+             rid        May be used to point to, for example, link
+                        contract numbers and sponsors
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename associated with
+                        a grant or sponsor                         -->
+<!ATTLIST  contract-sponsor
+             %contract-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    CONFERENCE INFORMATION ELEMENTS            -->
+<!-- ============================================================= -->
+
+
+<!--                    CONFERENCE MODEL                           -->
+<!--                    Content model for the <conference> element -->
+<!ENTITY % conference-model 
+                        "(%conference.class;)*"                      > 
+
+
+<!--                    CONFERENCE INFORMATION                     -->
+<!--                    The container element for the information 
+                        about a single conference and its 
+                        proceedings.
+                        DESIGN NOTE: Conference elements were largely
+                        based on Cross-Ref.                        -->
+<!ELEMENT  conference   %conference-model;                           >
+
+
+<!--ELEM   conf-date     Defined in %common.ent;                   -->
+<!--ELEM   conf-name     Defined in %common.ent;                   -->
+
+
+<!--                    CONFERENCE ACRONYM ELEMENTS                -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference acronym.   
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an online
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-acronym-elements 
+                        "%simple-text;"                              >
+ 
+
+<!--                    CONFERENCE ACRONYM                         -->
+<!--                    The short name, popular name, or "jargon 
+                        name" for a conference, for example,
+                        "Extreme" for "Extreme Markup Languages" or
+                        "SIGGRAPH" for "Special Interest Group on 
+                        Computer Graphics". Provided for searching
+                        convenience when the jargon name is better
+                        known that the full formal conference name.
+                          Authoring and Conversion Note: A conference
+                        acronym often includes the year of the 
+                        conference (e.g. "SGML '97") or, less often, 
+                        the conference number (e.g., "AMBA 6"). It 
+                        is preferred, but not required, that the 
+                        acronym exclude this year or number (thus
+                        using "SGML" or "AMBA" and putting the year
+                        or number in the <conf-date> and 
+                        <conf-num> elements, respectively.         -->
+<!ELEMENT  conf-acronym (#PCDATA %conf-acronym-elements;)*           >
+
+
+<!--                    CONFERENCE NUMBER ELEMENTS                 -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference number.     
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-num-elements 
+                        "%simple-text;"                              >
+ 
+
+<!--                    CONFERENCE NUMBER                          -->
+<!--                    The sequential number of the conference.
+                        Authoring and Conversion Note: Ideally, the
+                        conference number should include only the 
+                        numeric portion of the number without any  
+                        suffixes or other text. For example, "The 
+                        19th XML/SGML Conference" should be tagged as 
+                           <conf-num>19</conf-num> 
+                        with the "th" dropped.                     -->
+<!ELEMENT  conf-num     (#PCDATA %conf-num-elements;)*               >
+
+
+<!--                    CONFERENCE SPONSOR  ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference sponsor. 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-sponsor-elements 
+                        "%simple-text;"                              >
+ 
+
+<!--                    CONFERENCE SPONSOR                         -->
+<!--                    One organization that sponsored the 
+                        conference. If more than one organization
+                        sponsored the conference, multiple 
+                        <conf-sponsor> elements should be used.    -->
+<!ELEMENT  conf-sponsor (#PCDATA %conf-sponsor-elements;)*           >
+
+
+<!--                    CONFERENCE THEME ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the conference theme.         
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an online
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-theme-elements 
+                        "%simple-text;"                              >
+ 
+
+<!--                    CONFERENCE THEME                           -->
+<!--                    The theme, slogan, or major subject area of
+                        the conference.  For example, the name of an
+                        annual conference, may be "16th ACH Gathering"
+                        but each year has a different theme topic,
+                        such as "Database Integration" or "Topic
+                        Map Subject Access".                       -->
+<!ELEMENT  conf-theme   (#PCDATA %conf-theme-elements;)*             >
+
+
+<!-- ============================================================= -->
+<!--                    COUNTING INFORMATION (ARTICLE METADATA)    -->
+<!-- ============================================================= -->
+
+
+<!ENTITY % counts-model "(fig-count?, table-count?, equation-count?, 
+                         ref-count?, page-count?, word-count?)"      >
+
+
+<!--                    COUNTS                                     -->
+<!--                    Wrapper element to hold all metadata that 
+                        "counts how many of something appear in the 
+                        article                                    -->
+<!ELEMENT  counts       %counts-model;                               >
+
+
+<!--                     EQUATION COUNT                            -->
+<!--                     Number of display equations <disp-formula> 
+                         that appear in the article. Inline-equations 
+                         <inline-formula> are not counted. No 
+                         distinction is made between numbered and 
+                         unnumbered equations, both are counted.   -->
+<!ELEMENT  equation-count 
+                         EMPTY                                       >
+<!--                     The "count" attribute indicates the number
+                         of display equations <disp-formula> in the 
+                         article. Inline-equations <inline-formula> 
+                         are not counted. No distinction is made 
+                         between numbered and unnumbered equations, 
+                         both are counted.                         -->
+<!ATTLIST  equation-count
+            count        NMTOKEN                           #REQUIRED >
+
+
+<!--                     FIGURE COUNT                              -->
+<!--                     Number of Figures <fig> that appear in the
+                         article. Loose <graphic>s that appear
+                         outside figures are not counted.          -->
+<!ELEMENT  fig-count     EMPTY                                       >
+<!--                     The "count" attribute indicates the number
+                         of figures in the article, that is, how
+                         many <fig> elements are used              -->
+<!ATTLIST  fig-count
+            count        NMTOKEN                           #REQUIRED >
+
+
+<!--                     TABLE COUNT                               -->
+<!--                     Number of tables (Table Wrapper <table-wrap>
+                         elements that appear in the article. Arrays 
+                         are not counted as tables.                -->
+<!ELEMENT  table-count   EMPTY                                       >
+<!--                     The "count" attribute indicates the number
+                         of tables in the article, that is, how
+                         many <table-wrap> elements are used.      -->
+<!ATTLIST  table-count
+            count        NMTOKEN                           #REQUIRED >
+
+
+<!--                     REFERENCE COUNT                           -->
+<!--                     Number of reference citations <citation> 
+                         that appear in the bibliographic reference 
+                         list <ref-list> in the article            -->
+<!ELEMENT  ref-count     EMPTY                                       >
+<!--                     The "count" attribute indicates the number
+                         of reference citations in the article     -->
+<!ATTLIST  ref-count
+            count        NMTOKEN                           #REQUIRED >
+
+
+<!--                     PAGE COUNT                                -->
+<!--                     Number of pages in a print article, counting
+                         each page or partial page as one. Electronic
+                         articles do not have page counts.         -->
+<!ELEMENT  page-count    EMPTY                                       >
+<!--                     The "count" attribute indicates the number
+                         of pages in the article                   -->
+<!ATTLIST  page-count
+            count        NMTOKEN                           #REQUIRED >
+
+
+<!--                     WORD COUNT                                -->
+<!--                     Approximate number of words that appear in 
+                         the article                               -->
+<!ELEMENT  word-count    EMPTY                                       >
+<!--                     The "count" attribute indicates the number
+                         of  words in the textual portion of an 
+                         article (not including the words in the 
+                         metadata or header information)           -->
+<!ATTLIST  word-count
+            count        NMTOKEN                           #REQUIRED >
+
+
+
+<!-- ============================================================= -->
+<!--                    TITLE GROUP ELEMENTS (BIBLIOGRAPHIC)       -->
+<!-- ============================================================= -->
+
+
+<!--                    TITLE GROUP MODEL                          -->
+<!--                    Content model for the <title-group> element-->
+<!ENTITY % title-group-model   
+                        "(article-title, subtitle*, trans-title*, 
+                          alt-title*, fn-group?)"                    > 
+
+
+<!--                    TITLE GROUP                                -->
+<!--                    Wrapper element to hold the various article 
+                        titles.
+                        Authoring and Conversion Note: A footnote or 
+                        other reference inside a title should usually 
+                        be placed inside the title, but may be tagged
+                        in a group at the end of the <title-group>, 
+                        if that is the way they are in the source.)-->
+<!ELEMENT  title-group  %title-group-model;                          >
+
+
+<!--ELEM   article-title
+                        Defined in %common.ent;                    -->
+<!--ELEM   trans-title  Defined in %common.ent;                    -->
+<!--ENTITY %title-elements;   
+                        Defined in %common.ent;                    -->
+                                                             
+
+<!--                    ARTICLE SUBTITLE                           -->
+<!ELEMENT  subtitle     (#PCDATA %title-elements;)*                  >
+
+
+<!--                    ALTERNATE TITLE                            -->
+<!--                    A "different" version of an article title,
+                        usually created so that it can be processed 
+                        in a special way, for example a short 
+                        version of the title for use in a Table of 
+                        Contents, an ASCII title, a right-running-
+                        head title, etc.
+                        Authoring and Conversion Note: This element
+                        should not be used for either the translated 
+                        title (which is an alternate version of a 
+                        title in another language) or the subtitle
+                        (which is an addition to the title).       -->
+<!ELEMENT  alt-title    (#PCDATA %title-elements;)*                  >
+<!--         alt-title-type
+                        Why this title was created, for example,
+                        "short" for a short version of the title,
+                        "toc" for use in a Table of Contents, "ASCII" 
+                        for an ASCII title, "right-running" for
+                        a right-running-head title, etc.           -->
+<!ATTLIST  alt-title
+             %alt-title-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    CONTRIBUTOR GROUP (AUTHOR/EDITOR) ELEMENTS -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR GROUP MODEL                    -->
+<!--                    Content model for the <contrib-group> 
+                        element                                    -->
+<!ENTITY % contrib-group-model   
+                        "(contrib+, (%contrib-info.class;)* )"       > 
+
+
+<!--                    CONTRIBUTOR GROUP                          -->
+<!--                    Wrapper element for information concerning 
+                        a grouping of contributors, such as the
+                        primary authors                            -->
+<!ELEMENT  contrib-group
+                        %contrib-group-model;                        >
+
+
+<!--                    CONTRIBUTOR MODEL                          -->
+<!--                    Content model for the <contrib> element    -->
+<!ENTITY % contrib-model  
+                        "((%name.class;)*, 
+                          (%degree.class; | %contrib-info.class;)* )">
+
+
+<!--                    CONTRIBUTOR                                -->
+<!--                    Wrapper element to contain the information
+                        about a single contributor, for example an
+                        author or editor.                   
+                        Authoring and Conversion Note: Use <xref> 
+                        to point to the institution <aff>, the
+                        corresponding information <corresp>, and 
+                        any author footnotes in the author note
+                        group.
+                        Conversion Note: When the ranking or 
+                        importance of authors is marked as a note,
+                        (for example, the ranking element in the 
+                        Elsevier DTD), it should be encoded in the
+                        role element. Thus, the Elsevier-tagged
+                        text:
+                          <ranking><sup>*</sup></ranking>
+                        would be converted to:
+                          <role><sup>*</sup></role>
+                                                                   -->
+<!ELEMENT  contrib      %contrib-model;                              >
+<!--         contrib-type
+                        What was the contribution of this person,
+                        for example: author, editor, contributor,
+                        translator, illustrator, designer, 
+                        research assistant, etc.                 
+             id         Unique identifier, so the contributor can be
+                        referenced
+             corresp    Corresponding Author (Set to 'yes' if this 
+                        contributor is a corresponding author.)
+             equal-contrib    
+                        Contributed equally (Set to 'yes' if all 
+                        contributors contributed equally.) 
+             deceased   Deceased (Set to 'yes' if the contributor
+                        has died.)                           
+             rid        May be used to point to information concerning
+                        the contributor, for example to the <corresp>
+                        Corresponding Information element.  There
+                        is no limit to the number of contributors 
+                        that can be designated as corresponding.
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ATTLIST  contrib
+             %contrib-atts;                                          >
+
+
+
+<!--ELEM  collab        Defined %common.ent; (also used in
+                        bibliographic citations)                   -->
+<!--ELEM  etal          Defined %common.ent; (also used in
+                        bibliographic citations)                   -->
+
+
+<!--                    DEGREE(S) ELEMENTS                         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <degrees>                             
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % degrees-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    DEGREE(S)                                  -->
+<!--                    Academic degrees or professional
+                        certifications                             -->
+<!ELEMENT  degrees      (#PCDATA %degrees-elements;)*                >
+
+
+<!--                    ON BEHALF OF CONTENT ELEMENTS              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <on-behalf-of>                             
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix beguines with
+                        an OR bar.                                 -->
+<!ENTITY % on-behalf-of-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    ON BEHALF OF                               -->
+<!--                    When a contributor has written or edited
+                        a work  "on-behalf-of" an organization or 
+                        group the contributor is acting as a
+                        representative of the organization, which 
+                        may or may not be his/her usual affiliation.
+                        Related elements: Some DTDs identify this
+                        category as a "collaboration", but it
+                        is really more akin to a "role" the person
+                        is playing with respect to the organization.
+                        Thus this element joins the related
+                        element <role> in describing the contribution
+                        of a contributor. The <role> element will
+                        say that a person is an "Editor" or 
+                        "Associate Editor" and the <on-behalf-of>
+                        element will state that this editing was
+                        undertaken as a representative of a group
+                        or organization:
+                        <contrib> 
+                             <name>
+                               <surname>Campion</surname>
+                               <given-names>M</given-names>
+                             </name>
+                             <on-behalf-of>for 
+                             the Multiple Sclerosis Collaborative 
+                             Research Group</on-behalf-of>
+                          </contrib>
+                           Conversion Note: In some DTDs, the 
+                        association "on-behalf-of" may have been 
+                        tagged as a <role> rather than as a
+                        specific <on-behalf-of>.
+                        It is therefore also acceptable although
+                        not as accurate) to tag the example as: 
+                           <contrib>
+                             <name>
+                               <surname>Campion</surname>
+                               <given-names>M</given-names>
+                             </name>
+                             <role>for the Multiple 
+                             Sclerosis Collaborative Research 
+                             Group</role>
+                           </contrib>                              -->
+<!ELEMENT  on-behalf-of    
+                        (#PCDATA %on-behalf-of-elements;)*           >
+
+
+<!--                    AUTHOR COMMENT MODEL                       -->
+<!--                    Content model for the <author-comment> 
+                        element                                    -->
+<!ENTITY % author-comment-model  
+                        "(title?, (%just-para.class;)+ )"            >
+
+
+<!--                    AUTHOR COMMENT                             -->
+<!--                    Used for extra textual material associated 
+                        with a contributor such as an author or
+                        editor
+                        Conversion Note: During conversion, this 
+                        element can act as an escape mechanism, to
+                        hold material not anticipated by the DTD.
+                        The base model is just paragraphs, but this
+                        model has been made into a Parameter Entity
+                        in case a section level is needed.         -->
+<!ELEMENT  author-comment    
+                        %author-comment-model;                       >
+
+
+<!-- ============================================================= -->
+<!--                    SUPPLEMENT ELEMENTS                        -->
+<!-- ============================================================= -->
+
+
+<!--                    SUPPLEMENT ELEMENTS                        -->
+<!--                    Elements for use in the <supplement> element
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % supplement-elements 
+                        "%simple-text;"                              > 
+
+
+<!--                    SUPPLEMENT                                 -->
+<!--                    For a journal published as a supplement, this
+                        is a container element for all the provided
+                        supplement information, such as additional
+                        identification numbers, titles, and 
+                        supplement series information.             -->
+<!ELEMENT supplement    (#PCDATA %supplement-elements;)*             >
+<!--        supplement-type   
+                        Indicates what sort of supplement, if the
+                        publisher has recorded that information,
+                        for example: "issue" meaning a supplement to 
+                        a particular journal issue; "conference", 
+                        meaning the supplement contains information 
+                        from a conference, symposium, or other 
+                        gathering; "periodic" for supplements issued  
+                        at regular intervals, etc.                 -->
+<!ATTLIST supplement
+            %supplement-atts;                                        >
+
+
+<!-- ================== End Article Metadata Elements  =========== -->
diff --git a/dtd/backmatter.ent b/dtd/backmatter.ent
new file mode 100644
index 0000000..64c0e37
--- /dev/null
+++ b/dtd/backmatter.ent
@@ -0,0 +1,277 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Back Matter Elements                              -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Back Matter Elements v2.0 20040830//EN"
+     Delivered as file "backmatter.ent"                            -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names elements that are not part of the main      -->
+<!--             textual flow of a work, but are considered to be  -->
+<!--             ancillary material.                               -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Parameter Entities for attribute lists         -->
+<!--             2) List of the back matter elements in            -->
+<!--                alphabetical order                             -->
+<!--                 - Acknowledgments <ack> (defined in           -->
+<!--                     %common.ent;)                             -->
+<!--                 - Appendix Matter <app-group>                 -->
+<!--                 - Footnote Group <fn-group>                   -->
+<!--                 - Glossary <glossary>                         -->
+<!--                 - Biography <bio> (defined in %common.ent;)   -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+        
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  5. COMPLETE MODELS WHEN OVER-RIDING A CONTENT MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now.
+     Added parentheses to Parameter Entity and removed them 
+     from the Element Declarations:
+     -  %app-model; 
+     -  %app-group-model; 
+     -  %fn-group-model;
+     -  %glossary-model;
+     -  %glossary-group-model;
+
+  4. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+
+  3. APPENDIX GROUP - model rewritten to use the new class Parameter
+     Entities %app.class; and %ref-list.class;. Default entities
+     placed into this module.
+
+  2. To correct potential classing problems, added the following
+     new Parameter Entities:     
+        - %fn-group-model;
+        - %fn-link.class; used in %fn-group-model;
+        - %gloss-group-model; (and made it contain its parentheses)
+        - %gloss-model; 
+
+  1. FPI - Updated public identifier to "v2.0 20040830"            -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                        %para-level;
+                        %sec-model;                                -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTES LISTS    -->
+<!-- ============================================================= -->
+
+                                                                
+<!--                    APPENDIX ATTRIBUTES                        -->
+<!--                    Attributes for the Appendix <app> element  -->
+<!ENTITY % app-atts
+             "id        ID                                #IMPLIED"  >
+                                                                   
+
+<!-- ============================================================= -->
+<!--                    BACKMATTER ELEMENTS                        -->
+<!-- ============================================================= -->
+
+
+<!--ELEM   bio          Defined in %common.ent;                    -->
+<!--ELEM   ref-list     Defined in %references.ent;                -->
+<!--ELEM   sec          Defined in %section.ent;                   -->
+<!--ELEM   ack          Defined in %common.ent;                    -->
+
+
+<!-- ============================================================= -->
+<!--                    APPENDIX ELEMENTS                          -->
+<!-- ============================================================= -->
+
+
+<!--                    APPENDIX GROUP MODEL                       -->
+<!--                    Content model for the <app-group> element  
+                        Note: an exception is made to the full
+                        class-mix structure to allow <app>
+                        inside an <app-group> without requiring a
+                        class for it.                              -->
+<!ENTITY % app-group-model   
+                        "(title?, (%para-level;)*, 
+                          (%app.class; | %ref-list.class;)*)"        > 
+
+
+<!--                    APPENDIX GROUP                             -->
+<!ELEMENT  app-group    %app-group-model;                            >
+
+
+<!--                    APPENDIX MODEL                             -->
+<!--                    Content model for the <app> element. The
+                        section model already contains parentheses.-->
+<!ENTITY % app-model    "%sec-model;"                                > 
+
+
+<!--                    APPENDIX                                   -->
+<!ELEMENT  app          %app-model;                                  >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  app
+             %app-atts;                                              >
+
+
+<!-- ============================================================= -->
+<!--                    FOOTNOTE GROUPING ELEMENTS                 -->
+<!-- ============================================================= -->
+
+
+<!--                    FOOTNOTE GROUP MODEL                       -->
+<!--                    Content model for the <fn-group> element   -->
+<!ENTITY % fn-group-model
+                        "(title?, (%fn-link.class;)+)"               >
+
+
+<!--                    FOOTNOTE GROUP                             -->
+<!--                    Footnotes in a journal article may be
+                        scattered throughout the text, at the places
+                        they occur, or collected in groups at the
+                        end of structural units.  This element is a
+                        wrapper tag for such groups of footnotes.  -->
+<!ELEMENT  fn-group     %fn-group-model;                             >
+
+
+<!-- ============================================================= -->
+<!--                    GLOSSARY                                   -->
+<!-- ============================================================= -->
+
+
+<!--                    GLOSSARY MODEL                             -->
+<!--                    Content model for the <glossary> element
+                        Note: an exception is made to the full
+                        class-mix structure to allow <gloss-group>
+                        inside an <glossary> without requiring a
+                        class for it.                              -->
+<!ENTITY % glossary-model
+                        "(title?, (%para-level;)*, gloss-group*)"    >
+                        
+                        
+<!--                    GLOSSARY ELEMENTS                          -->
+<!--                    Glossary or list of definitions.  Typically
+                        the content will be one or more Definition
+                        Lists.                                     -->
+<!ELEMENT  glossary     %glossary-model;                             >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  glossary
+             id         ID                                 #IMPLIED  >
+
+
+<!--                    GLOSSARY GROUP MODEL                       -->
+<!--                    Content model for the <gloss-group> element-->
+<!ENTITY % gloss-group-model
+                        "(title?, (%para-level;)*)"                  > 
+
+
+<!--                    GLOSSARY GROUP                             -->
+<!--                    A (usually headed) group of glossary
+                        definitions.  The most likely content for this
+                        element is a paragraph of explanation,
+                        followed by a definition list.             -->
+<!ELEMENT  gloss-group  %gloss-group-model;                          >
+
+
+<!-- ================== End Back Matter Module =================== -->
diff --git a/dtd/bookdoc_100301.dtd b/dtd/bookdoc_100301.dtd
new file mode 100644
index 0000000..78e2bae
--- /dev/null
+++ b/dtd/bookdoc_100301.dtd
@@ -0,0 +1,78 @@
+<!-- 
+
+		PubMed Books and Documents DTD
+		
+	This DTD was created in December 2009 to accommodate the loading of book and 
+	book chapter records to PubMed. 
+	
+	Use the PUBLIC Identifier
+	
+	"-//NLM-NCBI//DTD PubMed Books Documents, 12-16-2009 v.1//EN"
+	
+	Delivered as "bookdoc.dtd"
+
+	1/29/2010 - changed "FirstPage" to "StartPage"
+	2/3/2010 - added ArticleIdList to BookDocument and added bookaccession as value in %art.id.type.int;
+	
+	-->
+
+
+
+<!--ENTITY % personal.name "( ForeName?, LastName, Initials, Suffix? )">
+<!ENTITY % author.name "((%personal.name; | CollectiveName), Affiliation?)"-->
+
+<!--ENTITY % normal.date "Year,Month,Day,(Hour,(Minute,Second?)?)?"-->
+
+<!ENTITY % booklinkatts		
+			  "book		CDATA			#IMPLIED
+				part		CDATA			#IMPLIED
+				sec		CDATA			#IMPLIED"  >
+
+
+<!ELEMENT BookDocumentSet (BookDocument*, DeleteDocument?)>
+<!ELEMENT BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, GroupList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?) >
+
+<!ELEMENT Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, Volume?, VolumeTitle?, 
+	Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+<!ELEMENT Publisher (PublisherName, PublisherLocation?) >
+<!ELEMENT PublisherName      %text; >
+<!ELEMENT PublisherLocation (#PCDATA) >
+<!ELEMENT BookTitle      %text; >
+<!ATTLIST BookTitle	%booklinkatts; >
+
+<!ELEMENT ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT EndingDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT VolumeTitle %text; >
+<!ELEMENT Edition (#PCDATA) >
+<!ELEMENT CollectionTitle      %text; >
+<!ATTLIST CollectionTitle	%booklinkatts; >
+<!ELEMENT Isbn (#PCDATA) >
+<!ELEMENT Medium (#PCDATA) >
+<!ELEMENT ReportNumber (#PCDATA) >
+<!ELEMENT ContractNumber (#PCDATA) >
+<!ELEMENT CitationString      %text; >
+
+<!ATTLIST ArticleTitle	%booklinkatts; >
+
+
+<!ELEMENT LocationLabel		(#PCDATA)>
+<!ATTLIST LocationLabel
+			Type			(part|chapter|section|appendix|figure|table|box)			#IMPLIED >
+
+<!ATTLIST AuthorList Type ( authors | editors ) "authors">
+
+<!ELEMENT DeleteDocument (PMID*) >
+
+<!ELEMENT PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ELEMENT PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT Sections	(Section+) >
+<!ELEMENT Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT SectionTitle	%text; >
+<!ATTLIST SectionTitle	%booklinkatts; >
+
+<!ELEMENT PubmedBookArticleSet (PubmedBookArticle)*>
diff --git a/dtd/bookdoc_110101.dtd b/dtd/bookdoc_110101.dtd
new file mode 100644
index 0000000..78e2bae
--- /dev/null
+++ b/dtd/bookdoc_110101.dtd
@@ -0,0 +1,78 @@
+<!-- 
+
+		PubMed Books and Documents DTD
+		
+	This DTD was created in December 2009 to accommodate the loading of book and 
+	book chapter records to PubMed. 
+	
+	Use the PUBLIC Identifier
+	
+	"-//NLM-NCBI//DTD PubMed Books Documents, 12-16-2009 v.1//EN"
+	
+	Delivered as "bookdoc.dtd"
+
+	1/29/2010 - changed "FirstPage" to "StartPage"
+	2/3/2010 - added ArticleIdList to BookDocument and added bookaccession as value in %art.id.type.int;
+	
+	-->
+
+
+
+<!--ENTITY % personal.name "( ForeName?, LastName, Initials, Suffix? )">
+<!ENTITY % author.name "((%personal.name; | CollectiveName), Affiliation?)"-->
+
+<!--ENTITY % normal.date "Year,Month,Day,(Hour,(Minute,Second?)?)?"-->
+
+<!ENTITY % booklinkatts		
+			  "book		CDATA			#IMPLIED
+				part		CDATA			#IMPLIED
+				sec		CDATA			#IMPLIED"  >
+
+
+<!ELEMENT BookDocumentSet (BookDocument*, DeleteDocument?)>
+<!ELEMENT BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, GroupList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?) >
+
+<!ELEMENT Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, Volume?, VolumeTitle?, 
+	Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+<!ELEMENT Publisher (PublisherName, PublisherLocation?) >
+<!ELEMENT PublisherName      %text; >
+<!ELEMENT PublisherLocation (#PCDATA) >
+<!ELEMENT BookTitle      %text; >
+<!ATTLIST BookTitle	%booklinkatts; >
+
+<!ELEMENT ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT EndingDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT VolumeTitle %text; >
+<!ELEMENT Edition (#PCDATA) >
+<!ELEMENT CollectionTitle      %text; >
+<!ATTLIST CollectionTitle	%booklinkatts; >
+<!ELEMENT Isbn (#PCDATA) >
+<!ELEMENT Medium (#PCDATA) >
+<!ELEMENT ReportNumber (#PCDATA) >
+<!ELEMENT ContractNumber (#PCDATA) >
+<!ELEMENT CitationString      %text; >
+
+<!ATTLIST ArticleTitle	%booklinkatts; >
+
+
+<!ELEMENT LocationLabel		(#PCDATA)>
+<!ATTLIST LocationLabel
+			Type			(part|chapter|section|appendix|figure|table|box)			#IMPLIED >
+
+<!ATTLIST AuthorList Type ( authors | editors ) "authors">
+
+<!ELEMENT DeleteDocument (PMID*) >
+
+<!ELEMENT PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ELEMENT PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT Sections	(Section+) >
+<!ELEMENT Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT SectionTitle	%text; >
+<!ATTLIST SectionTitle	%booklinkatts; >
+
+<!ELEMENT PubmedBookArticleSet (PubmedBookArticle)*>
diff --git a/dtd/bookdoc_120101.dtd b/dtd/bookdoc_120101.dtd
new file mode 100644
index 0000000..78e2bae
--- /dev/null
+++ b/dtd/bookdoc_120101.dtd
@@ -0,0 +1,78 @@
+<!-- 
+
+		PubMed Books and Documents DTD
+		
+	This DTD was created in December 2009 to accommodate the loading of book and 
+	book chapter records to PubMed. 
+	
+	Use the PUBLIC Identifier
+	
+	"-//NLM-NCBI//DTD PubMed Books Documents, 12-16-2009 v.1//EN"
+	
+	Delivered as "bookdoc.dtd"
+
+	1/29/2010 - changed "FirstPage" to "StartPage"
+	2/3/2010 - added ArticleIdList to BookDocument and added bookaccession as value in %art.id.type.int;
+	
+	-->
+
+
+
+<!--ENTITY % personal.name "( ForeName?, LastName, Initials, Suffix? )">
+<!ENTITY % author.name "((%personal.name; | CollectiveName), Affiliation?)"-->
+
+<!--ENTITY % normal.date "Year,Month,Day,(Hour,(Minute,Second?)?)?"-->
+
+<!ENTITY % booklinkatts		
+			  "book		CDATA			#IMPLIED
+				part		CDATA			#IMPLIED
+				sec		CDATA			#IMPLIED"  >
+
+
+<!ELEMENT BookDocumentSet (BookDocument*, DeleteDocument?)>
+<!ELEMENT BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, GroupList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?) >
+
+<!ELEMENT Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, Volume?, VolumeTitle?, 
+	Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+<!ELEMENT Publisher (PublisherName, PublisherLocation?) >
+<!ELEMENT PublisherName      %text; >
+<!ELEMENT PublisherLocation (#PCDATA) >
+<!ELEMENT BookTitle      %text; >
+<!ATTLIST BookTitle	%booklinkatts; >
+
+<!ELEMENT ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT EndingDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT VolumeTitle %text; >
+<!ELEMENT Edition (#PCDATA) >
+<!ELEMENT CollectionTitle      %text; >
+<!ATTLIST CollectionTitle	%booklinkatts; >
+<!ELEMENT Isbn (#PCDATA) >
+<!ELEMENT Medium (#PCDATA) >
+<!ELEMENT ReportNumber (#PCDATA) >
+<!ELEMENT ContractNumber (#PCDATA) >
+<!ELEMENT CitationString      %text; >
+
+<!ATTLIST ArticleTitle	%booklinkatts; >
+
+
+<!ELEMENT LocationLabel		(#PCDATA)>
+<!ATTLIST LocationLabel
+			Type			(part|chapter|section|appendix|figure|table|box)			#IMPLIED >
+
+<!ATTLIST AuthorList Type ( authors | editors ) "authors">
+
+<!ELEMENT DeleteDocument (PMID*) >
+
+<!ELEMENT PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ELEMENT PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT Sections	(Section+) >
+<!ELEMENT Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT SectionTitle	%text; >
+<!ATTLIST SectionTitle	%booklinkatts; >
+
+<!ELEMENT PubmedBookArticleSet (PubmedBookArticle)*>
diff --git a/dtd/bookdoc_130101.dtd b/dtd/bookdoc_130101.dtd
new file mode 100644
index 0000000..8a4f338
--- /dev/null
+++ b/dtd/bookdoc_130101.dtd
@@ -0,0 +1,82 @@
+<!-- 
+
+		PubMed Books and Documents DTD
+		
+	This DTD was created in December 2009 to accommodate the loading of book and 
+	book chapter records to PubMed. 
+	
+	Use the PUBLIC Identifier
+	
+	"-//NLM-NCBI//DTD PubMed Books Documents, 12-16-2009 v.1//EN"
+	
+	Delivered as "bookdoc.dtd"
+
+	1/29/2010 - changed "FirstPage" to "StartPage"
+	2/3/2010 - added ArticleIdList to BookDocument and added bookaccession as value in %art.id.type.int;
+	
+	-->
+
+
+
+<!--ENTITY % personal.name "( ForeName?, LastName, Initials, Suffix? )">
+<!ENTITY % author.name "((%personal.name; | CollectiveName), Affiliation?)"-->
+
+<!--ENTITY % normal.date "Year,Month,Day,(Hour,(Minute,Second?)?)?"-->
+
+<!ENTITY % booklinkatts		
+			  "book		CDATA			#IMPLIED
+				part		CDATA			#IMPLIED
+				sec		CDATA			#IMPLIED"  >
+
+
+<!ELEMENT BookDocumentSet (BookDocument*, DeleteDocument?)>
+<!ELEMENT BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, GroupList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?, ItemList*) >
+
+<!ELEMENT Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, Volume?, VolumeTitle?, 
+	Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+<!ELEMENT Publisher (PublisherName, PublisherLocation?) >
+<!ELEMENT PublisherName      %text; >
+<!ELEMENT PublisherLocation (#PCDATA) >
+<!ELEMENT BookTitle      %text; >
+<!ATTLIST BookTitle	%booklinkatts; >
+
+<!ELEMENT ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT EndingDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT VolumeTitle %text; >
+<!ELEMENT Edition (#PCDATA) >
+<!ELEMENT CollectionTitle      %text; >
+<!ATTLIST CollectionTitle	%booklinkatts; >
+<!ELEMENT Isbn (#PCDATA) >
+<!ELEMENT Medium (#PCDATA) >
+<!ELEMENT ReportNumber (#PCDATA) >
+<!ELEMENT ContractNumber (#PCDATA) >
+<!ELEMENT CitationString      %text; >
+
+<!ATTLIST ArticleTitle	%booklinkatts; >
+
+
+<!ELEMENT LocationLabel		(#PCDATA)>
+<!ATTLIST LocationLabel
+			Type			(part|chapter|section|appendix|figure|table|box)			#IMPLIED >
+
+<!ATTLIST AuthorList Type ( authors | editors ) "authors">
+
+<!ELEMENT DeleteDocument (PMID*) >
+
+<!ELEMENT PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ELEMENT PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT Sections	(Section+) >
+<!ELEMENT Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT SectionTitle	%text; >
+<!ATTLIST SectionTitle	%booklinkatts; >
+
+<!ELEMENT PubmedBookArticleSet (PubmedBookArticle)*>
+
+<!ELEMENT ItemList (Item)+>
+<!ATTLIST ItemList ListType CDATA #REQUIRED>
+<!ELEMENT Item (#PCDATA)>
diff --git a/dtd/bookdoc_140101.dtd b/dtd/bookdoc_140101.dtd
new file mode 100644
index 0000000..8a4f338
--- /dev/null
+++ b/dtd/bookdoc_140101.dtd
@@ -0,0 +1,82 @@
+<!-- 
+
+		PubMed Books and Documents DTD
+		
+	This DTD was created in December 2009 to accommodate the loading of book and 
+	book chapter records to PubMed. 
+	
+	Use the PUBLIC Identifier
+	
+	"-//NLM-NCBI//DTD PubMed Books Documents, 12-16-2009 v.1//EN"
+	
+	Delivered as "bookdoc.dtd"
+
+	1/29/2010 - changed "FirstPage" to "StartPage"
+	2/3/2010 - added ArticleIdList to BookDocument and added bookaccession as value in %art.id.type.int;
+	
+	-->
+
+
+
+<!--ENTITY % personal.name "( ForeName?, LastName, Initials, Suffix? )">
+<!ENTITY % author.name "((%personal.name; | CollectiveName), Affiliation?)"-->
+
+<!--ENTITY % normal.date "Year,Month,Day,(Hour,(Minute,Second?)?)?"-->
+
+<!ENTITY % booklinkatts		
+			  "book		CDATA			#IMPLIED
+				part		CDATA			#IMPLIED
+				sec		CDATA			#IMPLIED"  >
+
+
+<!ELEMENT BookDocumentSet (BookDocument*, DeleteDocument?)>
+<!ELEMENT BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, GroupList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?, ItemList*) >
+
+<!ELEMENT Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, Volume?, VolumeTitle?, 
+	Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+<!ELEMENT Publisher (PublisherName, PublisherLocation?) >
+<!ELEMENT PublisherName      %text; >
+<!ELEMENT PublisherLocation (#PCDATA) >
+<!ELEMENT BookTitle      %text; >
+<!ATTLIST BookTitle	%booklinkatts; >
+
+<!ELEMENT ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT EndingDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT VolumeTitle %text; >
+<!ELEMENT Edition (#PCDATA) >
+<!ELEMENT CollectionTitle      %text; >
+<!ATTLIST CollectionTitle	%booklinkatts; >
+<!ELEMENT Isbn (#PCDATA) >
+<!ELEMENT Medium (#PCDATA) >
+<!ELEMENT ReportNumber (#PCDATA) >
+<!ELEMENT ContractNumber (#PCDATA) >
+<!ELEMENT CitationString      %text; >
+
+<!ATTLIST ArticleTitle	%booklinkatts; >
+
+
+<!ELEMENT LocationLabel		(#PCDATA)>
+<!ATTLIST LocationLabel
+			Type			(part|chapter|section|appendix|figure|table|box)			#IMPLIED >
+
+<!ATTLIST AuthorList Type ( authors | editors ) "authors">
+
+<!ELEMENT DeleteDocument (PMID*) >
+
+<!ELEMENT PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ELEMENT PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT Sections	(Section+) >
+<!ELEMENT Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT SectionTitle	%text; >
+<!ATTLIST SectionTitle	%booklinkatts; >
+
+<!ELEMENT PubmedBookArticleSet (PubmedBookArticle)*>
+
+<!ELEMENT ItemList (Item)+>
+<!ATTLIST ItemList ListType CDATA #REQUIRED>
+<!ELEMENT Item (#PCDATA)>
diff --git a/dtd/bookdoc_150101.dtd b/dtd/bookdoc_150101.dtd
new file mode 100644
index 0000000..8a4f338
--- /dev/null
+++ b/dtd/bookdoc_150101.dtd
@@ -0,0 +1,82 @@
+<!-- 
+
+		PubMed Books and Documents DTD
+		
+	This DTD was created in December 2009 to accommodate the loading of book and 
+	book chapter records to PubMed. 
+	
+	Use the PUBLIC Identifier
+	
+	"-//NLM-NCBI//DTD PubMed Books Documents, 12-16-2009 v.1//EN"
+	
+	Delivered as "bookdoc.dtd"
+
+	1/29/2010 - changed "FirstPage" to "StartPage"
+	2/3/2010 - added ArticleIdList to BookDocument and added bookaccession as value in %art.id.type.int;
+	
+	-->
+
+
+
+<!--ENTITY % personal.name "( ForeName?, LastName, Initials, Suffix? )">
+<!ENTITY % author.name "((%personal.name; | CollectiveName), Affiliation?)"-->
+
+<!--ENTITY % normal.date "Year,Month,Day,(Hour,(Minute,Second?)?)?"-->
+
+<!ENTITY % booklinkatts		
+			  "book		CDATA			#IMPLIED
+				part		CDATA			#IMPLIED
+				sec		CDATA			#IMPLIED"  >
+
+
+<!ELEMENT BookDocumentSet (BookDocument*, DeleteDocument?)>
+<!ELEMENT BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, GroupList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?, ItemList*) >
+
+<!ELEMENT Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, Volume?, VolumeTitle?, 
+	Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+<!ELEMENT Publisher (PublisherName, PublisherLocation?) >
+<!ELEMENT PublisherName      %text; >
+<!ELEMENT PublisherLocation (#PCDATA) >
+<!ELEMENT BookTitle      %text; >
+<!ATTLIST BookTitle	%booklinkatts; >
+
+<!ELEMENT ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT EndingDate ( Year, ((Month, Day?) | Season)? ) >
+<!ELEMENT VolumeTitle %text; >
+<!ELEMENT Edition (#PCDATA) >
+<!ELEMENT CollectionTitle      %text; >
+<!ATTLIST CollectionTitle	%booklinkatts; >
+<!ELEMENT Isbn (#PCDATA) >
+<!ELEMENT Medium (#PCDATA) >
+<!ELEMENT ReportNumber (#PCDATA) >
+<!ELEMENT ContractNumber (#PCDATA) >
+<!ELEMENT CitationString      %text; >
+
+<!ATTLIST ArticleTitle	%booklinkatts; >
+
+
+<!ELEMENT LocationLabel		(#PCDATA)>
+<!ATTLIST LocationLabel
+			Type			(part|chapter|section|appendix|figure|table|box)			#IMPLIED >
+
+<!ATTLIST AuthorList Type ( authors | editors ) "authors">
+
+<!ELEMENT DeleteDocument (PMID*) >
+
+<!ELEMENT PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ELEMENT PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT Sections	(Section+) >
+<!ELEMENT Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT SectionTitle	%text; >
+<!ATTLIST SectionTitle	%booklinkatts; >
+
+<!ELEMENT PubmedBookArticleSet (PubmedBookArticle)*>
+
+<!ELEMENT ItemList (Item)+>
+<!ATTLIST ItemList ListType CDATA #REQUIRED>
+<!ELEMENT Item (#PCDATA)>
diff --git a/dtd/chars.ent b/dtd/chars.ent
new file mode 100644
index 0000000..8d17cb8
--- /dev/null
+++ b/dtd/chars.ent
@@ -0,0 +1,359 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Custom Special Characters Module                  -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Custom Special Characters Module v2.0 20040830//EN"
+     Delivered as file "chars.ent"                                 -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    XML special character entities                    -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Definitions of DTD-specific and custom         -->
+<!--                special characters (as general entities        -->
+<!--                defined as hexadecimal or decimal character    -->
+<!--                entities - Unicode numbers)                    -->
+<!--                                                               -->
+<!-- REQUESTS FOR DTD CHANGES:                                     -->
+<!--             Send email to: pmc@ncbi.nlm.nih.gov               -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  2. Updated public identifier to "v2.0 20040830"          
+
+     =============================================================
+     Version 1.1                            (TRG) v1.1 (2003-11-01)
+
+  1. Modified content model of element <private-char> so that 
+     the element <inline-graphic> could be used multiple times.
+     Rationale: A series of <inline-graphic> elements may occur in 
+     the same content, especially if they are variants of one graphic, 
+     and may be linked, with only one variation being displayed.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    DESIGN COMMENT                             -->
+<!-- ============================================================= -->
+<!--                    This DTD Suite has been designed with Unicode
+                        as the basic representation of all special
+                        characters. The use of combining characters 
+                        is supported and encouraged as is the use
+                        of entities defined by the STIX project
+                        (http://www.ams.org/STIX/). Unicode values
+                        in planes other than Plane 0 may be freely
+                        used.
+                        
+                        Use of private publisher entities and Unicode
+                        Private Use Area is discouraged, but supported
+                        with the <private-char> element, for which a
+                        corresponding bitmap must be submitted.
+                        
+                        In cases where an entity name has been generally
+                        accepted with a corresponding Unicode number
+                        and the entity has not been added to
+                        the ISO standard entity sets, a named entity
+                        may be defined below (e.g. &euro;).
+                        
+                        Because of the potential for conflicts in
+                        assignments by different publishers,
+                        the Archival and Interchange DTD Suite does 
+                        not support assignment of values in the
+                        Unicode Private Use Area.
+                        Publishers who have defined characters in the
+                        Private Use Area must remap those characters
+                        to existing Unicode values (using combining
+                        characters for special accented characters
+                        where appropriate), or must submit bitmaps of
+                        those characters using one of the two methods
+                        supported under the <private-char> element.
+                        
+                        Those custom publisher entities for which 
+                        corresponding Unicode values have not been 
+                        determined must be tagged with the 
+                        <private-char> element. Publishers must submit 
+                        bitmaps of those characters using one of the 
+                        two methods supported in the <private-char> 
+                        element.                                   -->
+
+<!-- ============================================================= -->
+<!--                    COMMONLY ACCEPTED ENTITIES FOR UNICODE 
+                        GLYPHS                                     -->
+<!-- ============================================================= -->
+
+<!--                    For each of the following entities a name
+                        and a Unicode numerical character reference
+                        is given. Where a unique Unicode character 
+                        could be determined, that character was used.
+                        For some of the symbols combining characters
+                        have been used. Do not use this space to
+                        redefine characters already found in standard
+                        ISO entity sets. Do not use this space to
+                        define any character that cannot be 
+                        represented with Unicode.                  -->
+
+<!--                    LATIN SMALL LETTER G WITH CARON            -->
+<!ENTITY  gcaron        "&#x01E7;"                                   >
+
+
+<!--                    LATIN CAPITAL LETTER H WITH MACRON         -->
+<!ENTITY  Hmacr         "&#x0048;&#x0304;"                           >
+
+
+<!--                    EURO CURRENCY                              -->
+<!ENTITY  euro          "&#x20AC;"                                   >
+
+
+<!--                    FRANC CURRENCY                             -->
+<!ENTITY  franc         "&#x20A3;"                                   >
+
+
+<!-- ============================================================= -->
+<!--                    PRIVATE USE AREA AND CUSTOM CHARACTERS     -->
+<!-- ============================================================= -->
+<!--
+                        Special characters defined by publishers as
+                        custom entities or in the Unicode Private Use
+                        Area may not be deposited as is. If they
+                        cannot be remapped to existing Unicode values,
+                        they must be submitted as a bitmap using
+                        the <private-char> element. The most 
+                        repository-friendly technique is <glyph-data> 
+                        although individual bitmap files may be 
+                        submitted with inline-graphic.
+
+                        We would like to thank Beacon Publishing and
+                        the APS (American Physical Society) for 
+                        providing us with this technique.          -->
+
+
+<!--                    PRIVATE CHARACTER (CUSTOM OR UNICODE)      -->
+<!--                    A custom character entity defined by a
+                        publisher or a custom character from the
+                        Unicode private-use area for which a bitmap
+                        is submitted for the glyph.
+
+                        Since there are no completely standard/public
+                        agreements on how such characters are to be
+                        named and displayed, this technique is to be
+                        used instead of a custom general entity 
+                        reference, to provide complete information 
+                        on the intended character.
+                        A document should contain a <private-char> 
+                        element at each location where a private 
+                        character is used within the document. The 
+                        corresponding image for the glyph may be 
+                        given in the <glyph-data> element or as an 
+                        external bitmap file referenced by an 
+                        <inline-graphic> element.
+
+                        Implementation Note: <inline-graphic> should
+                        only be used outside <private-char> when the
+                        graphic is something other than a special
+                        character.                                 -->
+<!ELEMENT  private-char ((glyph-data | glyph-ref) | inline-graphic*) >
+<!--         description
+                        A human-readable description of the
+                        character, for example, "Arrow, normal 
+                        weight, single line, two-headed, Northwest 
+                        to Southeast". 
+             name       Unique name for the character in all 
+                        uppercase ASCII, similar to names found 
+                        in Unicode standard (e.g., "NORTHWEST 
+                        SOUTHEAST ARROW"                           -->
+<!ATTLIST  private-char
+             description
+                        CDATA                              #IMPLIED
+             name       CDATA                              #IMPLIED  >
+
+
+<!--                    GLYPH DATA FOR A PRIVATE CHARACTER         -->
+<!--                    This element is used when there is known to
+                        be no font available to render the private
+                        character. The <glyph-data> element can be
+                        used to provide information on the actual
+                        glyph that is associated with the private-use
+                        character. The element includes an inline
+                        bitmap of the glyph encoded in plain
+                        PBM (Plain Bit Map) format so that it is
+                        human-readable.
+
+                        For example:
+                        <private-char name="NORTHWEST SOUTHEAST ARROW"
+                        description="Arrow, normal weight, single
+                        line, two-headed, Northwest to Southeast">
+                        <glyph-data format="PBM" resolution="300"
+                        x-size="34" y-size="34">
+                        0000000000000000000000000000000000
+                        0111111111111100000000000000000000
+                        0111111111111100000000000000000000
+                        0111110000000000000000000000000000
+                        0111110000000000000000000000000000
+                        0111111000000000000000000000000000
+                        0110111100000000000000000000000000
+                        0110011110000000000000000000000000
+                        0110001111000000000000000000000000
+                        0110000111100000000000000000000000
+                        0110000011110000000000000000000000
+                        0110000001111000000000000000000000
+                        0110000000111100000000000000000000
+                        0110000000011110000000000000000000
+                        0110000000001111000000000000000000
+                        0110000000000111100000000000000000
+                        0110000000000011110000000000000000
+                        0000000000000001111000000000000000
+                        0000000000000000111100000000000110
+                        0000000000000000011110000000000110
+                        0000000000000000001111000000000110
+                        0000000000000000000111100000000110
+                        0000000000000000000011110000000110
+                        0000000000000000000001111000000110
+                        0000000000000000000000111100000110
+                        0000000000000000000000011110000110
+                        0000000000000000000000001111000110
+                        0000000000000000000000000111100110
+                        0000000000000000000000000011110110
+                        0000000000000000000000000001111110
+                        0000000000000000000000000001111110
+                        0000000000000000011111111111111110
+                        0000000000000000011111111111111110
+                        0000000000000000000000000000000000
+                        </glyph-data></private-char>               -->
+<!ELEMENT  glyph-data   (#PCDATA)                                    >
+<!--         id         Identifier so that the full glyph data need
+                        not be repeated every time the character is
+                        used. The <glyph-ref> element can be used
+                        to point to this ID, to reuse a character
+                        in subsequent text. If a character is not
+                        reused, it need not be given an "id"
+                        attribute.
+             format     An optional attribute that names the image
+                        format of the bitmap. Should be "PBM" if the
+                        plain bitmap is included inline, so that the
+                        plain text bitmap will be a human-readable
+                        matrix of zeros and ones.
+             resolution Resolution of the bitmap in dots per inch,
+                        expressed as a decimal integer (e.g. 72, 300)
+             x-size     Number of pixels per row in the bit-mapped 
+                        glyph
+             y-size     Number of rows of the bit-mapped glyph     -->
+<!ATTLIST  glyph-data
+             id         ID                                 #IMPLIED
+             format     NMTOKEN                            #IMPLIED
+             resolution CDATA                              #IMPLIED
+             x-size     CDATA                              #IMPLIED
+             y-size     CDATA                              #IMPLIED  >
+
+
+<!--                    GLYPH REFERENCE FOR A PRIVATE CHARACTER    -->
+<!--                    Once a private character has been declared
+                        using a <glyph-data> element, the character
+                        can be reused by using this element to 
+                        point to the full <glyph-data> element.
+                        The pointing uses the ID/IDREF mechanism,
+                        using the "glyph-data" attribute of this
+                        element to point to the "id" attribute of 
+                        another <glyph-data> element.              -->
+<!ELEMENT  glyph-ref    EMPTY                                        >
+<!--         glyph-data An IDREF-type attribute that points to the
+                        "id" attribute of a <glyph-data> character.
+                        The idea is to use the full glyph data once,
+                        then point to an existing character instead 
+                        of repeating the entire glyph data again.  -->
+<!ATTLIST  glyph-ref
+             glyph-data IDREF                              #IMPLIED  >
+
+<!-- ================== End Custom XML Special Characters ======== -->
diff --git a/dtd/common.ent b/dtd/common.ent
new file mode 100644
index 0000000..c149da8
--- /dev/null
+++ b/dtd/common.ent
@@ -0,0 +1,2790 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Common (Shared) Elements Module                   -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Common (Shared) Elements Module v2.0 20040830//EN"
+Delivered as file "common.ent"                                     -->
+<!-- ============================================================= -->
+
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the common parameter entities, calls the  -->
+<!--             shared modules (such as special characters and    -->
+<!--             notations) and provides declarations for elements -->
+<!--             that do not properly fit into one class, since    -->
+<!--             they can be used at more than one structural level-->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default classes for elements defined in this   -->
+<!--                module.  May be overridden by values in the    -->
+<!--                DTD's Customization Module                     -->
+<!--             2) Parameter Entities for attribute values        -->
+<!--             3) Parameter Entities for content models          -->
+<!--             4) Parameter Entities for attribute lists         -->
+<!--             5) Elements used in many modules/classes          -->
+<!--                  - Address elements                           -->
+<!--                  - Date elements                              -->
+<!--                  - Personal name elements                     -->
+<!--                  - Common metadata elements (shared by both   -->
+<!--                      article metadata and bibliographic       -->
+<!--                      reference metadata                       -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             1) Standard XML Special Characters Module         -->
+<!--                                       (%xmlspecchars.ent;)    -->
+<!--             2) Custom XML Special Characters (%chars.ent;)    -->
+<!--             3) Notation Declarations    (%notat.ent;)         -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+     
+ 29. NEW ELEMENT <x> GENERATED TEXT AND PUNCTUATION
+     Added a container element to hold punctuation or other 
+     generated text, typically when 1) an archive decides not 
+     to have any text generated and thus to pre-generate such 
+     things as commas or semicolons between keywords or 2) 
+     when an archive receives text with <x> tags embedded and 
+     wishes to retain them.
+
+ 28. PUBLISHER - Moved element here from %journalmeta.ent;
+     module since Book DTD also needed it and was not including
+     that module.
+
+ 27. PAGE ELEMENT ATTRIBUTES
+     a. Made an Parameter Entity for:
+        - %fpage-atts;
+        - %elocation-id-atts;
+     b. Gave %elocation-id-atts" the attribute "seq"
+        
+ 26. PUB ID TYPES - Added the new attribute values to the
+     Parameter Entity %pub-id-types;, which is used on <article>
+     and other elements. New values: pmcid and art-access-id
+
+ 25. CUSTOM METADATA - Added the new <custom-meta> element, its
+     components, and its wrapper. This element is used to insert
+     name/value pairs for metadata elements that are in source
+     material but were never envisioned by this DTD. Allowed this
+     element at the end of <article-meta>.
+
+ 24. DATES 
+     a. Made a new Parameter Entity %string-date-elements; to
+        hold all the elements that may be mixed with #PCDATA
+        inside a <string-date>
+     b. Also used %date-parts.class; and %x.class; in 
+        the new PE %string-date-elements;
+
+ 23. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now,
+     as this is the most flexible system, allowing for
+     #PCDATA, mixed, or element content. (This is in direct
+     contrast to the "-element" suffixed models, which are
+     designed to prohibit element content and permit only
+     #PCDATA or mixed content.) Added parentheses to Parameter
+     Entity and removed them from the Element Declaration.
+     - %custom-meta-model;
+     - %custom-meta-wrap-model;
+     - %def-model;
+     - %sec-model;
+     - %sec-opt-title-model;
+     - Removed parentheses from <notes>, <ack>, <address>, <date>
+
+ 22. CITATION MODEL / COPYRIGHT STATEMENT MODEL
+     ### Customization Alert ###
+     a. Replaced the Parameter Entity %copyright-statement-model; 
+        with the OR list Parameter Entity 
+        %copyright-statement-elements; and used that
+        within the content model of <copyright-statement>
+     b. Citation - In the PE %citation-elements; also
+        changed the PE -%ext-links.class; ==> -%address-links.class;
+        (Changed the content model of citation to match.)
+     c. In -%copyright-statement-elements;, replaced the mix 
+        -%rendition-plus; with its  constituent classes
+     d. In -%citation-elements;, replaced the mix -%simple-text;
+        with its constituent classes (with exception of 
+        %address-link.class;).
+
+ 21. RELATED ARTICLE
+     ### Customization Alert ###
+      - Renamed 
+         -%related-article-model; ==> -%related-article-elements;
+          (To match the DTD naming convention that full content 
+          models are named with a "-model" suffix and groups of 
+          elements to be added to #PCDATA for a particular
+          content model are named "-elements".)
+      - Started "-related-article-elements" PE with an OR Bar
+      - Deleted "ext-links.class", because these elements are 
+        already in the %references.class; (no model change)
+
+ 20. INLINE MATH - <inline-formula> added to:
+     - %label-elements; 
+
+ 19. RELATED ARTICLE ATTRIBUTES - Added the following attributes
+     to the element <related-article>:
+     a.  "id" - to provide a unique identifier
+     b.  "alternate-form-of", which works (similarly to the same 
+         attribute when used on a <graphic> element) to point to 
+         another <related-article> element within the same document 
+         as an alternate form of the related article.
+
+ 18. ISSUE TITLE <issue-title> - Created new element for a theme or
+     special issue title
+        - Defined here in the common module
+        - Added to <article-meta>
+        - Added to %references.class; (therefore to <citation>,
+          <product>, and <related-article>
+        - Created new Parameter Entities %issue-title-elements; 
+          which hold the OR-group of elements that may be mixed with 
+          #PCDATA inside the content model 
+
+ 17. ATTRIBUTION
+      - Moved <attrib> and its Parameter Entities from the paragraph
+        module to here, as it is numerous elements, such as <array>, 
+        <boxed-text>, <fig>, <table-wrap>, etc., in the Archival DTD.
+
+ 16. CUSTOM METADATA - Added the new <custom-meta> element, its
+     components, and its wrapper. This element is used to insert
+     name/value pairs for metadata elements that are in source
+     material but were never envisioned by this DTD. Allowed this
+     element at the end of <article-meta> and <journal-meta>.
+
+ 15. EMAIL- Considered to be just another type of external link, as
+     <ext-link> is, so added to:
+     - %collab-elements;
+     - %copyright-statement-elements;
+
+ 14. DATES 
+     a. Added new class %date-parts.class; to hold all the
+        potential components of date, such as <year>, <day>,
+        etc.
+     b. Made a new Parameter Entity %string-date-elements; to
+        hold all the elements that may be mixed with #PCDATA
+        inside a <string-date>
+     c. Used %date-parts.class; in that model.
+
+ 13. ROLE ELEMENT - Was added to the model for <citation>, thus
+     moved to this module from the article metadata module.
+
+
+ 12. NEW IDENTIFICATION ELEMENTS - in view of the larger role that 
+     some publishers are giving to DOIs:
+
+     a. OBJECT ID  -  Added a new class Parameter Entity 
+        %id.class; to hold the new element <object-id> Object 
+        Identifier. The <object-id> element is used to capture any 
+        publisher's or archive's ID, such as a DOI. This was modeled 
+        as an element (rather than as an attribute) to allow for 
+        multiple  IDs. New PE used in:
+          - %references.class (therefore inside <citation>, 
+             <related-article>, and <product>)
+          - metadata objects such as <abstract>
+          - display objects such as <figure>.
+        Added PE %object-id-atts; to hold the element's attributes
+        
+     b. ISSUE ID <issue-id> - new element for an identifier such 
+        as a DOI associated with a journal issue (as opposed to the 
+        existing element <issue>, which is defined as the issue 
+        number) 
+        - Defined here in the common module
+        - Added to <article-meta>
+        - Added to %references.class; (therefore to <citation>,
+          <product>, and <related-article>
+        - Created PE %issue-id-atts; to hold the attributes.
+
+     c. VOLUME ID <volume-id> - new element for an identifier such 
+        as a DOI associated with a volume of a journal (as opposed 
+        to the  existing element <volume>, which is defined as the 
+        volume number) 
+        - Defined here in the common module
+        - Added to <article-meta>
+        - Added to %references.class; (therefore to <citation>,
+          <product>, and <related-article>
+        - Created new Parameter Entities %volume-id-elements; 
+          which hold the OR-group of elements that may be mixed with 
+          #PCDATA inside the content model 
+        - Added PE %volume-id-atts; to hold the attributes.
+
+     
+     Note: All ID attributes for these new identification
+     elements was set to use the "pub-id-type" attribute, 
+     which is for Archival (Green) set as a CDATA attribute.
+
+ 11. NAME CLASS / STRING NAME / PERSON NAME CLASS
+     a. Created a new element <string-name> for names that
+        do not follow the former, strict personal name model.
+        <string-name> holds any combination of #PCDATA and any of 
+        the known personal-name elements such as <surname>.
+        - Used a new Parameter Entity %string-name-elements;
+          in the content model
+     
+     b. Created a new class %name.class; to hold all the ways
+        to name people: <name>, <string-name>, and <collab>
+        who produce products or articles.
+
+     c. Allowed <string-name> to be used anywhere <name> is
+        used. Inside
+         - citation (by adding to %references.class;)
+         - product  (by adding to %references.class;)
+
+     d. Added new attribute "initials" to the personal name
+        components: <surname> and <given-names>. This provides
+        a way to preserve the initials, for matching services
+        that prefer initials to full names. Since there are
+        many cases in which the initials cannot be determined
+        programmatically, we merely provide a bucket to record
+        them.
+        
+     e. Added new Parameter Entities %given-name-atts; and
+        %surname-atts; to hold the new "initials" attribute.
+
+ 10. ATTRIBUTE VALUE LISTS - The Green (Archival) DTD needed to
+     change all explicit attribute value lists in the DTD to CDATA. 
+     In the future, explicit list types will be a feature of the
+     Blue (Publishing) and new Authoring DTDs. Therefore, added
+     Parameter entities to hold the following attributes:
+       - date-type
+
+  9. RELATED ARTICLE ATTRIBUTES - Added the following attributes
+     to the element <related-article>:
+      - "id ID #IMPLIED" attribute, so the related-article
+        can be referenced.
+      - "ext-link-type" - to indicate the type of link used to 
+        point to the related article. Attribute was used with 
+        exactly the same content (CDATA) and suggested values 
+        as when used with the element <ext-link>.
+      - "issue" - used (along with "vol", "page", and "journal-id")
+         to provide metadata concerning the related article
+      - "journal-id"- used (along with "vol", "page", and "issue")
+         to provide metadata concerning the related article.
+      - "journal-id-type" - Performs the same function that this
+        attribute performs for the element <journal-id>. The
+        "journal-id"  values are the same as those for existing 
+        journal identifiers plus "issn".
+      - "alternate-form-of", which works (similarly to the same 
+        attribute when used on a <graphic> element) to point to 
+        another <related-article> element within the same document 
+        as an alternate form of the related article.
+     
+  8. PARAMETER ENTITY CLEANUP AND REGULARIZATION
+
+     a. RENAME ELEMENT MIXES NOT TO END IN "-elements", since that
+        suffix is reserved for mixes that are added to #PCDATA in
+        a particular element
+        ### Customization Alert ###
+        Names ending in "-elements" saved for element-specific mixes
+        that will be added to #PCDATA for one element
+        -  %sec-back-matter-elements; ==> %sec-back-matter-mix;
+               (Used in -%sec-model; and -%sec-opt-title-model;)
+     
+     b. NEW CLASSES - Largely for classing and modification reasons,
+        the following new classes were added:
+        - %date.class;
+        - %def.class;
+        - %degree.class;
+        - %id.class; 
+        - Removed duplicate %person-name.class;
+
+     c. NEW MIXES - To correct potential classing problems, new 
+        Parameter Entities were created. The following content 
+        models were changed to use these new entities.
+        - <etal>           -%etal-elements;
+        - <ext-link>       -%ext-link-elements;
+        - <fax>            -%fax-elements;
+        - <given-names>    -%given-names-elements;
+        - <issn>           -%issn-elements;
+        - <issue>          -%issue-elements;
+        - <label>          -%label-elements;
+        - <long-desc>      -%long-desc-elements;
+        - <phone>          -%phone-elements;
+        - <prefix>         -%prefix-elements;
+        - <publisher-name> -%publisher-name-elements;
+        - <role>           -%role-elements;
+        - <suffix>         -%suffix-elements;
+        - <surname>        -%surname-elements;
+        - <uri>            -%uri-elements;
+        - <volume>         -%volume-elements;
+        - <volume-id>      -%volume-id-elements;
+
+        - <bio>      %bio-model; (which uses %just-para.class;)
+        - <def>      %def-model;
+        - <def>      %just-para.class;
+ 
+     d. RENAME CLASSES
+        ### Customization Alert ###
+        Not all classes ended in the ".class" suffix. Changed the 
+        following to add the class suffix:
+        - %address-elements; (renamed -%address.class;) used in 
+            - %aff-elements; 
+            - %publisher-loc-elements;
+            - %address-model;
+        - %inline-math.class; used in -%label-elements; 
+ 
+     e. PE %attrib-elements;
+        ### Customization Alert ###
+        Uses %emphasized-text; which now starts with an OR bar, so
+        removed the OR bar from this PE.
+
+     f. LINK CLASSES
+        - In %aff-elements;, replaced %link.class; with
+          the following classes (via use of %all-phrase;)
+          (no DTD change):
+            - %address-link.class;  (external used in addresses)
+            - %simple-link.class;   (the internal links, same)
+            - %article-link.class;  (for journal articles)
+       -  In -%collab-elements;
+            - Replaced -%ext-links.class; with the following class
+              (via use of %all-phrase;)
+              (no DTD change):
+              - address-link.class; (external used in addresses)
+            - Deleted -%inpara-address; 
+              (No model change, %address-link.class; covers it.)
+       -  In %copyright-statement-elements;, replaced 
+          -%inpara-address; with -%address-link.class;
+          (via use of %all-phrase;)
+
+  7. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+
+  6. Updated public identifier to "v2.0 20040830" 
+     
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  5. Made <copyright-statement> model into a parameter entity in 
+     order to add <ext-link> to the content model.
+     Rationale:  Permit linkage between copyright statement and 
+     copyright holder's site.
+
+  4. Added attribute "content-type" to element <ack>. 
+     Rationale: To identify and preserve the semantic intent of 
+     semantically rich source documents.
+               
+  3. Added ID attribute to the following elements:
+       - <ack> 
+       - <address> 
+       - <alt-text>
+       - <ext-link> (by modifying %ext-link-atts;)
+       - <institution>
+       - <long-desc> 
+       - <notes> (by modifying parameter entity %notes-atts;)
+     Rationale: Provide unique identifier so these elements can be 
+     linked to.  
+     
+  2. Added element <label> to content model of <aff> (by adding
+     -%label.class; to parameter -%aff-elements;)
+     Rationale: To provide <label>  when needed for format 
+     over-ride.
+     
+     =============================================================
+     Version 1.0 Changes Before Public Release
+                                       (Lapeyre) v1.0 (2002-12-25)
+
+  1. ETAL - Changed the content model of <etal> to replace the
+     entire content model with a Parameter Entity, not just name 
+     some elements that may mix with #PCDATA. Rationale: The 
+     Authoring DTD would like to make <etal> EMPTY.         
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                        - %address.class;
+                        - %break.class;
+                        - %emphasis.class;
+                        - %inline-display.class;
+                        - %just-rendition;
+                        - %label.class;
+                        - %para-level;
+                        - %references.class;
+                        - %rendition-plus;
+                        - %sec-back-matter-mix;
+                        - %sec-level;
+                        - %sec-opt-title-model;
+                        - %simple-link.class;
+                        - %simple-phrase;
+                        - %simple-text;
+                        - %subsup.class;
+                        - %might-link-atts;                        -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE VALUES    -->
+<!-- ============================================================= -->
+
+
+<!--                    HISTORY DATE TYPES                         -->
+<!--                    The <history> element contains one or more 
+                        <date> elements that record events in the 
+                        life of a publication.          
+          date-type     Attribute should only be used if the date
+                        is one of the known types; otherwise omit
+                        the attribute. 
+                        Values are:
+                          accepted    - Date manuscript was 
+                                        accepted         
+                          received    - Date manuscript received
+                          rev-request - Date revisions were 
+                                        requested or manuscript 
+                                        was returned
+                          rev-recd    - Date revised manuscript 
+                                        was received               -->
+<!ENTITY % date-types   "accepted | received | rev-request | 
+                         rev-recd"                                   >
+
+
+<!--                    ARTICLE/PUBLICATION IDENTIFIER TYPES       -->
+<!--                    The "pub-id-type" attribute names the
+                        type of identifier, or the organization or 
+                        system that defined this identifier for the 
+                        identifier of the journal article or a 
+                        cited publication.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pub-id> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Valid Types include:
+                          art-access-id
+                                 - Generic article accession id for
+                                   interchange and retrieval between
+                                   archives
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                                   be present on older articles)
+                          doi    - Digital Object Identifier for
+                                   the article
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    /epub/piius.htm
+                          pmcid  - PubMed Central identifier        
+                          pmid   - PubMed ID (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id - 
+                                   Publisher's identifying number 
+                                   such as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ENTITY % pub-id-types  "art-access-id | coden | doi | medline | 
+                          other | pii | pmcid |  pmid | 
+                          publisher-id | sici"                       >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR COMMENT MODELS      -->
+<!-- ============================================================= -->
+
+
+<!--                    DATE ELEMENTS MODEL                        -->
+<!--                    The content models for elements that describe
+                        dates, such as Publication Date <pub-date>
+                        and History Dates <date>.  The <string-date>
+                        element holds dates for which months and 
+                        years are not given, for example "first 
+                        quarter", "spring", etc.                   -->
+<!ENTITY % date-model   "( ( (day?, month?) | season)?,
+                          year?, string-date?)"                      >
+
+
+<!--                    CONTENT MODEL FOR A STRUCTURAL SECTION     -->
+<!--                    The model for a section that requires that a
+                        section title be present, used for elements
+                        such as Section and Appendix.              -->
+<!ENTITY % sec-model    "(label?, title, (%para-level;)*, 
+                          (%sec-level;)*, 
+                          (%sec-back-matter-mix;)* )"                >
+
+
+<!--                    CONTENT MODEL FOR AN UNTITLED SECTION      -->
+<!--                    The model for a section-like structure that
+                        may or may not have an initial title       -->
+<!ENTITY % sec-opt-title-model
+                        "(label?, title?, (%para-level;)*,  
+                          (%sec-level;)*, 
+                          (%sec-back-matter-mix;)* )"                >
+
+
+<!--                    LINK ELEMENTS                              -->
+<!--                    Elements for use in the linking elements
+                        such as <xref>, <target>, and <ext-link>   -->
+<!ENTITY % link-elements 
+                        "| %emphasis.class; | %subsup.class;"        > 
+
+
+<!--                    TITLE ELEMENTS                             -->
+<!--                    Elements for use in all the title elements
+                        such as <title>, <subtitle>, <trans-title>,
+                        etc.                       
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % title-elements   
+                        "%simple-phrase; | %break.class;"            > 
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR LINKING ATTRIBUTES  -->
+<!-- ============================================================= -->
+              
+
+<!--                    XLINK LINK ATTRIBUTES                      -->
+<!--                    Used for elements that are a link by
+                        definition, such as the <xref> element.         
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename
+             xlink:role Provides a URI reference pointing to some
+                        resource that describes the role or function 
+                        of this link           
+             xlink:title
+                        Describes the meaning of the link in a 
+                        human-readable and displayable fashion
+             xlink:show Describes the requested presentation when 
+                        the link is traversed.  
+                        Values are:
+                          embed    Load the new presentation in the
+                                   place of the link
+                          new      Load a new window, frame, pane, or 
+                                   other presentation
+                          none     No clue for the application
+                          other    Look to other markup for a clue
+                          replace  Load the new resource in the same
+                                   window, frame, pane, or other
+                                   presentation context as the link
+                                   started in
+            xlink:actuate
+                        When is the link traversed, and under whose
+                        control.  
+                        Values are:
+                          none     No clue for the application
+                          onLoad   Traverse the link immediately
+                                   upon loading the link
+                          onRequest
+                                   User or software requests that the
+                                   link be traversed
+                          other    Look to other markup for a clue
+                                                                   -->       
+<!ENTITY % link-atts
+            "xmlns:xlink CDATA                            #FIXED
+                                     'http://www.w3.org/1999/xlink'
+             xlink:type  (simple)                   #FIXED 'simple'
+             xlink:href  CDATA                            #REQUIRED 
+             xlink:role  CDATA                            #IMPLIED
+             xlink:title CDATA                            #IMPLIED
+             xlink:show  (embed | new | none | other | replace)
+                                                          #IMPLIED
+             xlink:actuate   
+                         (none | onLoad | onRequest | other)          
+                                                           #IMPLIED" >
+
+
+<!--                    MIGHT LINK XLINK ATTRIBUTES                -->
+<!--                    Used for elements which may need to link to
+                        external sources or other objects within
+                        the document, but may not necessarily act 
+                        as a link at all.  The attribute
+                        "xlink:href" identifies the object to which 
+                        the link points.                           -->
+<!ENTITY % might-link-atts
+            "xmlns:xlink CDATA                             #FIXED
+                                     'http://www.w3.org/1999/xlink'
+             xlink:type  (simple)                   #FIXED 'simple'
+             xlink:href  CDATA                             #IMPLIED 
+             xlink:role  CDATA                             #IMPLIED
+             xlink:title CDATA                             #IMPLIED
+             xlink:show  (embed | new | none | other | replace)
+                                                           #IMPLIED
+             xlink:actuate   
+                         (none | onLoad | onRequest | other)          
+                                                           #IMPLIED" >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTES LISTS    -->
+<!--                    (ALPHABETICAL ORDER)                       -->
+<!-- ============================================================= -->
+                                                                
+                                                                 
+<!--                    AFFILIATION ATTRIBUTES                     -->
+<!--                    Attributes for the Affiliation <aff> 
+                        element                                    -->
+<!ENTITY % aff-atts
+            "id         ID                                 #IMPLIED  
+             rid        IDREFS                             #IMPLIED" >
+
+                                                                
+<!--                    BIOGRAPHY ATTRIBUTES                       -->
+<!--                    Attributes for <bio> element    
+             id         Unique identifier so the element may be
+                        referenced 
+             rid        Points to the identifier of an author or
+                        authors                               
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ENTITY % bio-atts
+             "id        ID                                #IMPLIED
+              rid       IDREFS                            #IMPLIED
+              %might-link-atts;"                                     >
+
+                                                                
+<!--                    COLLABORATION ATTRIBUTES                   -->
+<!--                    Attributes for <collab>                    -->
+<!--          collab-type
+                        The type or role of the collaborators, 
+                        what function did they play in the 
+                        publication.
+                        Suggested values include:
+                          assignee 
+                                  - Group or company to whom a patent 
+                                    is awarded
+                          authors - Content creators
+                          editors - Content editors
+                          compilers
+                                  - Put together a composite work
+                                    from multiple sources
+                          guest-editors 
+                                  - A group of editors that have been
+                                    invited to edit all or part of a
+                                    work
+                          inventors 
+                                  - Idea, software, or machine 
+                                    creators
+                          translators
+                                  - Translated the cited work from 
+                                    one language into another
+             id         Unique identifier so that the collaboration
+                        can be referenced
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ENTITY % collab-atts
+            "collab-type       
+                        CDATA                             #IMPLIED  
+             id         ID                                #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!--                    EXTERNAL LINK ATTRIBUTES                   -->
+<!--                    Attribute list for external links 
+             ext-link-type 
+                        Type of external link. Use this attribute
+                        if the type of external link is one of the
+                        ones below or another named type.
+                        Suggested values include:
+                            aoi         Astronomical Object Identifier 
+                            doi         Digital Object Identifier
+                            ec          Enzyme nomenclature - see
+                              http://www.chem.qmw.ac.uk/iubmb/enzyme/
+                            ftp         File transfer protocol
+                            email       An email address
+                            gen         GenBank identifier
+                            genpept     Translated Protein-encoding
+                                        sequence Database
+                            highwire    HighWire press intrajournal 
+                            pmid        PubMed identifier
+                            pdb         Protein data bank. See 
+                                        http://www.rcsb.org/pdb/
+                            pgr         Plant gene register. See
+                                        http://www.tarweed.com/pgr/
+                            pir         Protein Information Resource
+                                        see http://pir.georgetown.edu
+                            pirdb       Protein Information Resource 
+                                        see http://pir.georgetown.edu
+                            pmc         PubMedCentral identifier
+                            sprot       Swiss-Prot. See
+                                    http://www.ebi.ac.uk/swissprot/
+                            uri         Website or web service    
+             id         Unique identifier so the element may be
+                        referenced 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ENTITY %  ext-link-atts
+             "ext-link-type 
+                        CDATA                              #IMPLIED
+              id        ID                                 #IMPLIED
+              %might-link-atts;"                                     >
+
+                                                                
+<!--                    CITATION ATTRIBUTES                        -->
+<!--                    Attributes for <citation>
+             citation-type
+                        Defines the type of work being referenced.
+                        Suggested values include:
+                          book         Book 
+                          conf-proceedings
+                                       Conference proceedings
+                          discussion   Discussion among a group in
+                                       some forum - public, private,
+                                       or electronic, which may or
+                                       may not be moderated
+                          gov          Government publication
+                          journal      Journal article
+                          list         Listserv
+                          other        None of the listed types
+                          patent       Patent or patent application
+                          personal-communication
+                                       Informal or personal 
+                                       communication, such as a 
+                                       phone call or an email
+                                       message
+                          standard     Standards document issued by
+                                       a recognized standards body,
+                                       such as ISO, ANSI, IEEE, 
+                                       OASIS, etc.
+                          thesis       Work written as part of the
+                                       completion of an advanced 
+                                       degree
+                          web          Website
+             id         Unique identifier so the element may be
+                        referenced 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ENTITY % citation-atts
+             "citation-type   
+                        CDATA                              #IMPLIED  
+              id        ID                                 #IMPLIED
+              %might-link-atts;"                                     >
+
+
+<!--                    DATE (HISTORICAL) ATTRIBUTES               -->
+<!--         date-type  Attribute should only be used if the date
+                        is one of the known types, otherwise omit
+                        the attribute. Values are:
+                          accepted    - Date manuscript was 
+                                        accepted         
+                          received    - Date manuscript received
+                          rev-request - Date revisions were 
+                                        requested or manuscript 
+                                        was returned
+                          rev-recd    - Date revised manuscript 
+                                        was received               -->
+<!ENTITY % date-atts
+             "date-type (%date-types;)                     #IMPLIED" >
+
+
+<!--                    GIVEN NAMES ATTRIBUTES                     -->
+<!--         initials   The initial(s) for the given names of the
+                        person. Particularly useful in those cases
+                        that cannot be algorithmically determined. -->
+<!ENTITY % given-names-atts
+             "initials  CDATA                              #IMPLIED" >
+
+
+<!--                    ISSN ATTRIBUTES                            -->
+<!--                    Attribute list for <issn>                  -->
+<!--                    Used to record the type of publication, for
+                        example, a print-only publication versus
+                        an electronic-only publication, in any of
+                        several life stages.
+                        Suggested values include:
+                          epub        - Electronic publication
+                          ppub        - Print publication
+                          epub-ppub   - Published in both print and
+                                        electronic form
+                          epreprint   - Electronic preprint 
+                                        dissemination    
+                          ppreprint   - Print preprint dissemination     
+                          ecorrected  - Corrected in electronic    
+                          pcorrected  - Corrected in print     
+                          eretracted  - Retracted in electronic    
+                          pretracted  - Retracted in print         -->
+<!ENTITY %  issn-atts
+             "pub-type   CDATA                           #IMPLIED"   >
+                                                                
+                                                                 
+<!--                    ISSUE IDENTIFIER ATTRIBUTES                -->
+<!--                    Attributes for the <issue-id> element
+             pub-id-type
+                        Publication (article) Identifier Type
+                        Names the type of identifier, or the 
+                        organization or system that defined this 
+                        identifier for the identifier of the journal 
+                        article or a cited publication. This is an
+                        optional CDATA attribute that should be used
+                        whenever the type is known.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pubid> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Suggested values include:
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                          doi    - Digital Object Identifier
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    http://pubs.acs.org/epub/piius.htm
+                                   or 
+                                    http://www.aip.org/epub/piipr.html
+                          pmid   - PubMed Central identifier (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id 
+                                 - Publisher's identifier such 
+                                   as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   'pub-id', etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ENTITY % issue-id-atts
+            "pub-id-type
+                        CDATA                              #IMPLIED" >
+
+
+<!--                    NOTE ATTRIBUTES                            -->
+<!--                    Attribute list for <note>                  -->
+<!--         notes-type To identify the type of note, if the type
+                        can be/has been identified, for example,
+                        "note-in-proof"                            
+             id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ENTITY % notes-atts
+            "id         ID                                #IMPLIED
+             notes-type CDATA                             #IMPLIED"  >
+                                                                
+                                                                 
+<!--                    OBJECT IDENTIFIER ATTRIBUTES               -->
+<!--                    Attributes for the <object-id> element
+             pub-id-type
+                        Publication (article) Identifier Type
+                        Names the type of identifier, or the 
+                        organization or system that defined this 
+                        identifier for the identifier of the journal 
+                        article or a cited publication. This is an
+                        optional CDATA attribute that should be used
+                        whenever the type is known.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pubid> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Suggested values include:
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                          doi    - Digital Object Identifier
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    http://pubs.acs.org/epub/piius.htm
+                                   or 
+                                    http://www.aip.org/epub/piipr.html
+                          pmid   - PubMed Central identifier (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id 
+                                 - Publisher's identifier such 
+                                   as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   'pub-id', etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ENTITY % object-id-atts
+            "pub-id-type
+                        CDATA                              #IMPLIED" >
+
+                                                                
+<!--                    RELATED ARTICLE ATTRIBUTES                 -->
+<!--                    Attributes for <related-article>         
+             id         Unique identifier so the element may be
+                        referenced
+             alt-form-of
+                        Exactly like the "alt-form-of" attribute
+                        used with <graphic>, this is an IDREF
+                        attribute which points to the ID of another
+                        <related-article> in the same document
+                         rather than to an external file.
+             related-article-type
+                          addendum      Additional material for an
+                                        article, generated too late
+                                        to be added to the main text
+                          commentary-article   
+                                        Used in an commentary or
+                                        editorial to link to the 
+                                        article on which it is
+                                        commenting
+                          companion     Used in an article to link 
+                                        to a companion (related
+                                        or sibling) article 
+                          corrected-article
+                                        Used in a correction to link 
+                                        to the article being 
+                                        corrected. Sometimes called
+                                        erratum.
+                          in-this-issue Related article in the same
+                                        journal issue
+                          letter        A letter to the publication
+                                        or a reply to such a
+                                        letter
+                          commentary    Used in an article to link 
+                                        to its associated commentary
+                                        or editorial 
+                          correction-forward
+                                        Used in an article to link
+                                        forward to its associated 
+                                        correction (rarely used)
+                          retracted-article
+                                        Used in a retraction to link 
+                                        to the article being retracted
+                          retraction-forward   
+                                        Used in an article to link
+                                        forward to its associated 
+                                        retraction (rare)
+             ext-link-type
+                        Type of external link used to point to the
+                        related article. Use this attribute
+                        if the type of external link is one of the
+                        ones below or another named type.
+                        Suggested values include:
+                            aoi         Astronomical Object Identifier 
+                            doi         Digital Object Identifier
+                            ec          Enzyme nomenclature - see
+                              http://www.chem.qmw.ac.uk/iubmb/enzyme/
+                            ftp         File transfer protocol
+                            email       An email address
+                            gen         GenBank identifier
+                            genpept     Translated Protein-encoding
+                                        sequence Database
+                            highwire    HighWire press intrajournal 
+                            pdb         Protein data bank. See 
+                                        http://www.rcsb.org/pdb/
+                            pgr         Plant gene register. See
+                                        http://www.tarweed.com/pgr/
+                            pir         Protein Information Resource
+                                        see http://pir.georgetown.edu
+                            pirdb       Protein Information Resource 
+                                        see http://pir.georgetown.edu
+                            pmc         PubMed Central identifier
+                            pmid        PubMed identifier
+                            sprot       Swiss-Prot. See
+                                    http://www.ebi.ac.uk/swissprot/
+                            uri         Website or web service    
+             The next five attributes are used to identify the
+             journal in which the related article was published. 
+             vol        Volume of the journal in which the related
+                        article exists.  It is best practice to
+                        limit the scope to the current journal, 
+                        the one in which the current article
+                        resides.
+             page       Page number of the related article. It is 
+                        best practice to limit the scope to the 
+                        current journal, the one in which the 
+                        current article resides. The values for this 
+                        attribute should be a first page or a page 
+                        range.
+             issue      Issue number of the related article. 
+             journal-id Identifier for the journal which contains the
+                        related article.
+             journal-id-type   
+                        Indicates whose identifier this is, for
+                        example, "pub-id" for a publisher's
+                        identifier or "pmc" for PubMed Central.
+                        Suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Identifier assigned by a data
+                                 aggregator
+                          doi    Digital Object Identifier for the
+                                 entire journal, not just for the
+                                 article (rare)
+                          index  Identifier assigned by an
+                                 abstracting or indexing service
+                          issn   International Standard Serial Number
+                                 of the journal in which the related
+                                 article was published
+                          pmc    Identifier assigned by PubMed Central
+                                 for example, the pmc journal 
+                                 abbreviation such as "pnas", "mbc", 
+                                 "nar", "molcellb", which may be the 
+                                 same as the abbreviated journal 
+                                 title
+                          publisher-id 
+                                 Identifier assigned by the content
+                                 publisher, for example, "MOLEC", 
+                                 "MOLCEL"
+                          nlm-ta Identifier assigned by the 
+                                 PubMed/Medline, and is typically
+                                 the journal abbreviation, for 
+                                 example, "Mol Biol Cell", "Nucleic
+                                 Acids Res", which may be the
+                                 same as the abbreviated journal 
+                                 title.
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ENTITY % related-article-atts
+             "id        ID                                #IMPLIED
+              alternate-form-of
+                        IDREF                             #IMPLIED
+              related-article-type
+                        CDATA                             #REQUIRED
+              ext-link-type 
+                        CDATA                             #IMPLIED
+              vol       CDATA                             #IMPLIED
+              page      CDATA                             #IMPLIED  
+              issue     CDATA                             #IMPLIED
+              journal-id
+                        CDATA                             #IMPLIED  
+              journal-id-type  
+                        CDATA                             #IMPLIED 
+              %might-link-atts;"                                     >
+
+
+<!--                    SURNAME ATTRIBUTES                         -->
+<!--         initials   The initial(s) for the given names of the
+                        person. Particularly useful in those cases
+                        that cannot be algorithmically determined. -->
+<!ENTITY % surname-atts
+             "initials  CDATA                              #IMPLIED" >
+                                                                
+                                                                 
+<!--                    VOLUME IDENTIFIER ATTRIBUTES               -->
+<!--                    Attributes for the <issue-id> element
+             pub-id-type
+                        Publication (article) Identifier Type
+                        Names the type of identifier, or the 
+                        organization or system that defined this 
+                        identifier for the identifier of the journal 
+                        article or a cited publication. This is an
+                        optional CDATA attribute that should be used
+                        whenever the type is known.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pubid> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Suggested values include:
+                          coden  - Obsolete PDB/CCDC identifier (may
+                                   be present on older articles)
+                          doi    - Digital Object Identifier
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    http://pubs.acs.org/epub/piius.htm
+                                   or 
+                                    http://www.aip.org/epub/piipr.html
+                          pmid   - PubMed Central identifier (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id 
+                                 - Publisher's identifier such 
+                                   as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   'pub-id', etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ENTITY % volume-id-atts
+            "pub-id-type
+                        CDATA                              #IMPLIED" >
+
+
+<!-- ============================================================= -->
+<!--                    ELEMENT USED BY MORE THAN ONE CLASS        -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    COMMON METADATA/BIBLIOGRAPHIC ELEMENTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE TITLE                              -->
+<!--                    The title of the article in the language
+                        in which the article was originally
+                        published          
+                        Remarks: The related element Translated Title
+                        <trans-title> should be used for a
+                        translation of the article into another
+                        language, for example, to hold the English
+                        version of a Japanese article title.       -->
+<!ELEMENT  article-title       
+                        (#PCDATA %title-elements;)*                  >
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  article-title
+             xml:lang   NMTOKEN                            #IMPLIED  > 
+
+
+<!--                    AFFILIATION ELEMENTS                       -->
+<!--                    Elements for use in the <aff> element      -->
+<!ENTITY % aff-elements "| %address.class; | %address-link.class; |
+                         %article-link.class; | %break.class; | 
+                         %emphasis.class; | %label.class; | 
+                         %simple-link.class; | %subsup.class;"       > 
+
+
+<!--                    AFFILIATION                                -->
+<!--                    Name of a institution or organization such as
+                        a university or corporation. 
+                        Authoring and Conversion Note: In a typical 
+                        case, the "id" attribute will be pointed to 
+                        by one or more contributors.               
+                        Conversion Note: Any explicitly tagged numbers
+                        or symbols for author linkages should be 
+                        discarded, as the linkage will be recreated
+                        from the "id" connection.
+                        Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->                       
+<!ELEMENT  aff          (#PCDATA %aff-elements;)*                    >
+<!--         id         Unique identifier so that the affiliated
+                        institution may be referenced, for example 
+                        by a contributor
+             rid        May be used to point to affiliation-related
+                        information within the document            
+                                                                   -->
+<!ATTLIST  aff
+             %aff-atts;                                              >
+
+
+<!--                    COLLABORATIVE (GROUP) AUTHOR ELEMENTS      -->
+<!--                    Elements for use in the <collab> element
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there. 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % collab-elements 
+                        "%simple-text; | %address-link.class; | 
+                         %simple-link.class;"                        > 
+
+
+<!--                    COLLABORATIVE (GROUP) AUTHOR               -->
+<!--                    Used for groups of authors credited under 
+                        one name, either as a collaboration in the
+                        strictest sense, or when an organization, 
+                        institution, or corporation is the group.  
+                        Remarks: When an author is an organization 
+                        rather than a person, use the <collab> 
+                        element rather than <surname>, for
+                        example: 
+                           <collab>Aardvark Institute</collab>  
+                                                                   -->
+<!ELEMENT  collab       (#PCDATA %collab-elements;)*                 >
+<!--         collab-type
+                        The type or role of the collaborators, 
+                        what function did they play in the 
+                        publication.
+                        Suggested values include:
+                          assignee 
+                                  - Group or company to whom a patent 
+                                    is awarded
+                          authors - Content creators
+                          editors - Content editors
+                          compilers
+                                  - Put together a composite work
+                                    from multiple sources
+                          guest-editors 
+                                  - A group of editors that have been
+                                    invited to edit all or part of a
+                                    work
+                          inventors 
+                                  - Idea, software, or machine 
+                                    creators
+                          translators
+                                  - Translated the cited work from 
+                                    one language into another
+                                    one language into another
+             id         unique identifier so that the collaboration
+                        can be referenced
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ATTLIST  collab
+             %collab-atts;                                           >
+
+
+<!--                    CONFERENCE DATE ELEMENTS                   -->
+<!--                    Elements for use in the <conf-date> element-->
+<!ENTITY % conf-date-elements 
+                        "  "                                         > 
+             
+
+<!--                    CONFERENCE DATE                            -->
+<!--                    The date(s) on which the conference was held.
+                          Conference dates in journal headers are
+                        traditionally stored in one of two forms:
+                        as a single date ("May 1906") or as the
+                        first day and last day of the conference.
+                        Both types should be stored in this element;
+                        the dates that come from separate first and 
+                        last elements should be combined:
+                          <conf-start>August 4, 2002</conf-start>
+                          <conf-end>August 9, 2002<conf-end>
+                        should become:
+                          <conf-date>August 4, 2002 - August 9,
+                          2002</conf-date>
+                                                                   -->
+<!ELEMENT  conf-date    (#PCDATA %conf-date-elements;)*              >
+
+
+<!--                    CONFERENCE LOCATION ELEMENTS               -->
+<!--                    Elements for use in the <conf-loc> element 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-loc-elements 
+                        "%simple-text;"                            > 
+ 
+
+<!--                    CONFERENCE LOCATION                        -->
+<!--                    The physical location(s) of the conference.
+                        This may include a city, a country, or a
+                        campus or organization location if that is
+                        the only location available.
+                        Authoring and Conversion Note: If the 
+                        conference is in the United States, the 
+                        state should also be provided. A specific 
+                        venue or address (e.g. conference hotel) 
+                        should not be provided unless there is no
+                        other location information.                -->
+<!ELEMENT  conf-loc     (#PCDATA %conf-loc-elements;)*               >
+
+
+<!--                    CONFERENCE NAME ELEMENTS                   -->
+<!--                    Elements for use in the <conf-name> element.
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % conf-name-elements 
+                        "%simple-text;"                            > 
+
+
+<!--                    CONFERENCE NAME                            -->
+<!--                    The full name of the conference, including any
+                        qualifiers such as "43rd Annual". When the
+                        name includes the year of the conference,
+                        (e.g. "Extreme 2002"), the year should appear
+                        in both the conference Name and the Conference
+                        Date elements.                             -->
+<!ELEMENT  conf-name    (#PCDATA %conf-name-elements;)*              >
+
+
+<!--                    COPYRIGHT STATEMENT MODEL                  -->
+<!--                    Content model for <copyright-statement>    -->
+<!ENTITY % copyright-statement-elements 
+                        "| %address-link.class;| %emphasis.class; | 
+                         %subsup.class;"                             > 
+
+
+<!--                    COPYRIGHT STATEMENT                        -->
+<!--                    Copyright notice or statement, suitable for
+                        printing or display. Within the statement the
+                        copyright year should be identified, if
+                        expected to be displayed.                  -->
+<!ELEMENT  copyright-statement
+                        (#PCDATA %copyright-statement-elements;)*    >
+
+
+<!--                    OBJECT IDENTIFIER                          -->
+<!--                    Used to record an identifier such as a DOI
+                        for an interior element such as an <abstract>
+                        or <figure>.
+                        Remarks: Such an identifier may be created
+                        by a publisher or archive, and there is no
+                        requirement that identifiers be unique.    -->
+<!ELEMENT  object-id    (#PCDATA)                                    >  
+<!--         id-type    Indicates what type of identifier this is or
+                        who assigned the identifier, for example,
+                        "pub-id" for a publisher's non-DOI
+                        identifier or "DOI" for a Digital Object
+                        Identifier.
+                          In Archival this is a CDATA attribute but
+                        suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Assigned by a data aggregator
+                          doi    Digital Object Identifier
+                          index  Assigned by an abstracting or 
+                                 indexing service
+                          pmc    Assigned by PubMed Central
+                          publisher-id 
+                                 Non-DOI Identifier assigned by 
+                                 the content publisher             -->
+<!ATTLIST  object-id
+             %object-id-atts;                                        >
+
+
+<!--                    JOURNAL IDENTIFIER ATTRIBUTES              -->
+<!--                    Attribute list for journal identifier 
+                        <journal-id> element                       -->
+<!--                    Indicates whose identifier this is, for
+                        example, "pub-id" for a publisher's
+                        identifier or "pmc" for PubMed Central.
+                        Suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Identifier assigned by a data
+                                 aggregator
+                          doi    Digital Object Identifier for the
+                                 entire journal, not just for the
+                                 article (rare)
+                          index  Identifier assigned by an
+                                 abstracting or indexing service
+                          pmc    Identifier assigned by PubMed Central
+                                 for example, the pmc journal 
+                                 abbreviation such as "pnas", "mbc", 
+                                 "nar", "molcellb", which may be the 
+                                 same as the abbreviated journal 
+                                 title
+                          publisher-id 
+                                 Identifier assigned by the content
+                                 publisher, for example, "MOLEC", 
+                                 "MOLCEL"
+                          nlm-ta Identifier assigned by the 
+                                 PubMed/Medline, and is typically
+                                 the journal abbreviation, for 
+                                 example, "Mol Biol Cell", "Nucleic
+                                 Acids Res", which may be the
+                                 same as the abbreviated journal 
+                                 title.                            -->
+<!ENTITY %  journal-id-atts
+             "journal-id-type  
+                        CDATA                            #IMPLIED  " > 
+
+
+<!--                    ISSUE TITLE ELEMENTS                       -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issue> element          -->
+<!ENTITY % issn-elements 
+                        " "                                          > 
+
+
+<!--                    ISSN                                       -->
+<!--                    International Standard Serial Number       -->
+<!ELEMENT  issn         (#PCDATA %issn-elements;)                    >
+<!--                    Used to record the type of publication, for
+                        which this ISSN was issued, for example, 
+                        a print-only publication versus
+                        an electronic-only publication, in any of
+                        several life stages.
+                        Suggested values include:
+                          epub        - Electronic publication
+                          ppub        - Print publication
+                          epub-ppub   - Published in both print and
+                                        electronic form
+                          epreprint   - Electronic preprint 
+                                        dissemination    
+                          ppreprint   - Print preprint dissemination     
+                          ecorrected  - Corrected in electronic    
+                          pcorrected  - Corrected in print     
+                          eretracted  - Retracted in electronic    
+                          pretracted  - Retracted in print     
+                          -->
+<!ATTLIST  issn
+             %issn-atts;                                             >
+
+
+<!--                    ISSUE TITLE ELEMENTS                       -->
+<!--                    Elements for use with data characters inside
+                        the model for the <issue> element          -->
+<!ENTITY % issue-elements 
+                        "%just-rendition;"                           > 
+
+
+<!--                    ISSUE NUMBER                               -->
+<!--                    NEW DEFINITION FOR RELEASE 2.0:
+                        The issue number, issue name, or other 
+                        identifier of an issue of a journal that
+                        is displayed or printed with the issue. 
+                        This is not the machine-readable internal 
+                        identifier such as a DOI or SICI, that is
+                        the related element <issue-id>             -->
+<!ELEMENT  issue        (#PCDATA %issue-elements;)*                  >  
+
+
+<!--                    ISSUE IDENTIFIER                           -->
+<!--                    Used to record an identifier such as a DOI
+                        that describes an entire issue of a 
+                        journal                                    -->
+<!ELEMENT  issue-id     (#PCDATA)                                    >  
+<!--         pub-id-type    
+                        Indicates what type of identifier this is or
+                        who assigned the identifier, for example,
+                        "pub-id" for a publisher's non-DOI
+                        identifier or "DOI" for a Digital Object
+                        Identifier.
+                          In Archival this is a CDATA attribute but
+                        suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Assigned by a data aggregator
+                          doi    Digital Object Identifier
+                          index  Assigned by an abstracting or 
+                                 indexing service
+                          pmc    Assigned by PubMed Central
+                          publisher-id 
+                                 Non-DOI Identifier assigned by 
+                                 the content publisher             -->
+<!ATTLIST  issue-id
+             %issue-id-atts;                                         >
+
+
+<!--                    ISSUE TITLE ELEMENTS                       -->
+<!--                    Elements for use in the <issue-title> element
+                                                                   -->
+<!ENTITY % issue-title-elements 
+                        ""                                           > 
+
+
+<!--                    ISSUE TITLE                                -->
+<!--                    Used to record the theme or special issue
+                        title for an issue of the journal          -->
+<!ELEMENT  issue-title  (#PCDATA %issue-title-elements;)*            >  
+
+
+<!--                    ROLE ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <role>                    
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar; since %rendition-plus; is an 
+                        inline mix, the OR bar is already there.   -->  
+<!ENTITY % role-elements
+                        "%rendition-plus;"                           >
+
+
+<!--                    ROLE OR FUNCTION TITLE OF CONTRIBUTOR      -->
+<!--                    A title or the role of a contributor
+                        (such as an author) in this work. For example,
+                        Editor-in-Chief, Contributor, Chief
+                        Scientist, Photographer, Research Associate,
+                        etc.              
+                        Remarks: Information on the role or type of
+                        contribution is collected in two places,
+                        in the "contrib-type" attribute on the
+                        Contributor element and in the Role element.  
+                        For example, the Contributor attribute might 
+                        have a value of "editor", while the content 
+                        of the role element could be "Associate 
+                        Editor". As another example, the contributor
+                        attribute might be "author" and the role
+                        element might be "Principle Author".
+                        The <role> element is also more likely to 
+                        appear on screen or in print than the 
+                        contributor attribute value.               -->
+<!ELEMENT  role         (#PCDATA %role-elements;)*                   >
+
+
+<!--                    VOLUME NUMBER ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <volume>                                 -->
+<!ENTITY % volume-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    VOLUME NUMBER                                     -->
+<!--                    NEW DEFINITION FOR RELEASE 2.0:
+                        The volume number, volume name, or other 
+                        identifier of an volume of a journal that
+                        is displayed or printed with the volume. 
+                        This is not the machine-readable internal 
+                        identifier such as a DOI or SICI, that is
+                        the related element <volume-id>            -->
+<!ELEMENT  volume       (#PCDATA %volume-elements;)*                 >
+
+
+<!--                    TRANSLATED TITLE                           -->
+<!--                    An alternate version of the title that has
+                        been translated into a language other than
+                        that of the article title <article-title>  
+                        Remarks: The related element Article Title
+                        <article-title> should be used for the title
+                        of the article in the original language in 
+                        which it was published, this element used
+                        for a translation of that title, for example
+                        the English version of a Japanese article. -->
+<!ELEMENT  trans-title  (#PCDATA %title-elements;)*                  >
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German).  These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).
+                          Authoring and Conversion Note: For the
+                        Translated Title element, the xml:lang
+                        attribute should always be set if the
+                        value is known. The only reason the
+                        attribute was not made #REQUIRED was that
+                        there may be cases where the language is
+                        not known.                                 -->
+<!ATTLIST  trans-title
+             xml:lang   NMTOKEN                            #IMPLIED  >
+
+
+<!--                    VOLUME IDENTIFIER ELEMENTS                 -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <volume-id>                              -->
+<!ENTITY % volume-id-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    VOLUME IDENTIFIER                          -->
+<!--                    Used to record an identifier such as a DOI
+                        that describes an entire volume of a 
+                        journal.
+                           REMARKS: The related elements <volume>
+                        holds the volume number as published
+                        with the journal.                          -->
+<!ELEMENT  volume-id    (#PCDATA %volume-id-elements;)*              >
+<!--         pub-id-type    
+                        Indicates what type of identifier this is or
+                        who assigned the identifier, for example,
+                        "pub-id" for a publisher's non-DOI
+                        identifier or "DOI" for a Digital Object
+                        Identifier.
+                          In Archival this is a CDATA attribute but
+                        suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Assigned by a data aggregator
+                          doi    Digital Object Identifier
+                          index  Assigned by an abstracting or 
+                                 indexing service
+                          pmc    Assigned by PubMed Central
+                          publisher-id 
+                                 Non-DOI Identifier assigned by 
+                                 the content publisher             -->
+<!ATTLIST  volume-id
+             %volume-id-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON METADATA ELEMENTS CONTINUED         -->
+<!--                    PUBLISHER IDENTIFICATION ELEMENTS          -->
+<!--                    (COMMON ARTICLE METADATA/BIBLIOGRAPHIC)    -->
+<!--                    Used in article metadata and also inside   -->
+<!--                    a bibliographic reference (citation)       -->
+<!-- ============================================================= -->
+
+
+<!--                    ET AL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <etal>                                  -->
+<!ENTITY % etal-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    ET AL CONTENT MODEL                        -->
+<!--                    The content model for the <etal> element   -->
+<!ENTITY % etal-model   "(#PCDATA %etal-elements;)*"                 > 
+
+
+<!--                    ET AL                                      -->
+<!--                    Although most journals modeled this as an
+                        EMPTY element, typically used to generate
+                        the text "et al." in a stylesheet, some
+                        journal DTDs (Blackwell's, for example) expect
+                        content for this element, with such text as
+                        "Associates, coworkers, and colleagues".   -->
+<!ELEMENT  etal         %etal-model;                                 >  
+
+
+<!--                    PUBLISHER                                  -->
+<!--                    Who published the work                     -->
+<!ELEMENT  publisher    (publisher-name, publisher-loc?)             >
+
+
+<!--                    PUBLISHER'S NAME ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <publisher-name>
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar; since %just-rendition; is an 
+                        inline mix, the OR bar is already there    -->  
+<!ENTITY % publisher-name-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    PUBLISHER'S NAME                           -->
+<!--                    Name of the publisher of the work          -->
+<!ELEMENT  publisher-name      
+                        (#PCDATA %publisher-name-elements;)*         >  
+
+
+<!--                    PUBLISHER'S LOCATION ELEMENTS              -->
+<!--                    Elements for use in the Publisher Location
+                        <publisher-loc> element                    -->
+<!ENTITY % publisher-loc-elements 
+                        "| %address.class; | %address-link.class; |
+                         %emphasis.class; | %subsup.class;"          > 
+
+
+<!--                    PUBLISHER'S LOCATION                       -->
+<!--                    Place of publication, usually a city such
+                        as New York or London                      -->
+<!ELEMENT  publisher-loc       
+                        (#PCDATA %publisher-loc-elements;)*          >
+
+
+<!-- ============================================================= -->
+<!--                    COMMON METADATA ELEMENTS CONTINUED         -->
+<!--                    PAGE NUMBERING ELEMENTS                    -->
+<!-- ============================================================= -->
+
+
+<!--                    FIRST PAGE ATTRIBUTES                      -->
+<!--         seq        Used for sequence number or letter for 
+                        journals (such as continuous makeup journals) 
+                        with more than one article starting on the 
+                        same page                                  -->
+<!ENTITY % fpage-atts
+             "seq        CDATA                             #IMPLIED" >
+
+<!--                    FIRST PAGE                                 -->
+<!--                    The page number on which the article starts,
+                        for print journals that have page numbers  -->
+<!ELEMENT  fpage        (#PCDATA)                                    >
+<!--         seq        Used for sequence number or letter for 
+                        journals (such as continuous makeup journals) 
+                        with more than one article starting on the 
+                        same page                                  -->
+<!ATTLIST  fpage
+             %fpage-atts;                                            >
+             
+
+<!--                    LAST PAGE                                  -->
+<!--                    The page number on which the article ends,
+                        for print journals that have page numbers  -->
+<!ELEMENT  lpage        (#PCDATA)                                    >
+             
+
+<!--                    PAGE RANGES                                -->
+<!--                    A container element for additional page 
+                        information (TO BE USED TO SUPPLEMENT AND
+                        NOT TO REPLACE <fpage> and <lpage>) to record
+                        discontinuous pages ranges such as 
+                            "8-11, 14-19, 40"
+                        meaning that the article begins on page
+                        8, runs 8 through 11, skips to pages 14 
+                        through 19, and concludes on page 40.      -->
+<!ELEMENT  page-range   (#PCDATA)                                    >
+
+
+<!--                    ELECTRONIC LOCATION IDENTIFIER ATTRIBUTES  -->
+<!--         seq        Used for sequence number or letter for 
+                        journals (such as continuous makeup journals) 
+                        so that the publisher's sequence of articles
+                        can be preserved, even for electronic
+                        publications.                              -->
+<!ENTITY % elocation-id-atts
+             "seq        CDATA                             #IMPLIED" >
+
+
+<!--                    ELECTRONIC LOCATION IDENTIFIER             -->
+<!--                    Used to identify an article that 
+                        does not have traditional page numbers. 
+                        For a printed article, when citations are 
+                        sent through the Medline matcher to be turned
+                        into live links or when the metadata about an
+                        article is collected for complete
+                        identification,  the first page number (and 
+                        sometimes  also the last page number) of the 
+                        article is recorded to help indicate which
+                        article is being referenced. Electronic only
+                        journals have no page numbers, so this
+                        element is used as the equivalent identifier,
+                        the "electronic page number" that helps to
+                        identify the article. The value could be an 
+                        article identifier, a doi, etc., for 
+                        example, "E70".                        
+                        Remarks: This element is more accurately an
+                        electronic identifier, and it was considered
+                        renaming this element to that. The purpose
+                        of the name is to be a parallel with the
+                        <fpage>...<lpage> model. When neither first
+                        page or last page is appropriate, because
+                        the electronic journal has no pages, the
+                        <elocation-id> element is used instead.    -->
+<!ELEMENT  elocation-id (#PCDATA)                                    >
+<!--         seq        Used for sequence number or letter for 
+                        journals (such as continuous makeup journals) 
+                        with more than one article starting on the 
+                        same page                                  -->
+<!ATTLIST  elocation-id 
+             %elocation-id-atts;                                     >
+
+
+<!-- ============================================================= -->
+<!--                    CITATION (BIBLIOGRAPHIC REFERENCE)         -->
+<!-- ============================================================= -->
+
+
+<!--                    CITATION ELEMENTS                          -->
+<!--                    Content model for the <citation> element. 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar.                                    -->
+<!ENTITY % citation-elements   
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %label.class; | 
+                         %phrase.class; | %references.class; |
+                         %subsup.class;"                             > 
+
+
+<!--                    CITATION                                   -->
+<!--                    A citation is a description of a work, such
+                        as a journal article, book, or personal
+                        communication, that is cited in the text of
+                        the article. Although the DTD does not
+                        enforce it, a citation to a journal article
+                        *should* be tagged with as many as possible 
+                        of the following, so that PubMed Central or
+                        other matching processing can make the 
+                        citation into a live link:
+                           source  The MEDLINE abbreviation of the
+                                   journal name
+                           article-title  
+                                   Title of the article
+                           volume  Volume of the journal
+                           issue   Issue of the journal
+                           fpage   Page number on which the article
+                                   starts
+                           name    Of an author or editor
+                           year    Year of publication
+                           month   Month of publication (if present)
+                           day     Date of publication (if present)
+                        The other elements may be tagged if
+                        desired.  The <title> element may be used
+                        for titles of books, conference proceedings,
+                        etc.
+                        Authoring and Conversion Note: In order to 
+                        make citations into live links, as much
+                        of the author and date information as is
+                        available should be preserved. The most
+                        important date tag is year, and it should
+                        always be tagged if possible:
+                            <year>2003</year> 
+                        The <day> and <month> tags will be used
+                        more rarely; they are provided because some
+                        of the citation matching services can use
+                        the month and the day if they are available.
+                                                                   -->
+<!ELEMENT  citation     (#PCDATA %citation-elements;)*               >
+<!--         citation-type
+                        Defines the type of work being referenced.
+                        Suggested values include:
+                          book         Book 
+                          personal-communication
+                                       Informal or personal 
+                                       communication, such as a 
+                                       phone call or an email
+                                       message
+                          conf-proceedings
+                                       Conference proceedings
+                          discussion   Discussion among a group in
+                                       some forum - public, private,
+                                       or electronic, which may or
+                                       may not be moderated
+                          gov          Government publication
+                          journal      Journal article
+                          list         Listserv
+                          other        None of the listed types
+                          patent       Patent or patent application
+                          thesis       Work written as part of the
+                                       completion of an advanced 
+                                       degree
+                          web          Website
+             id         Unique identifier so the element may be
+                        referenced 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ATTLIST  citation
+             %citation-atts;                                         >
+             
+
+<!-- ============================================================= -->
+<!--                    ADDRESS ELEMENTS (BIBLIOGRAPHIC)           -->
+<!-- ============================================================= -->
+
+
+<!--                    ADDRESS MODEL                              -->
+<!--                    Content model for the <address> element    -->
+<!ENTITY % address-model    
+                        "(%address.class; | %address-link.class;)*"  >
+
+
+<!--                    ADDRESS/CONTACT INFORMATION                -->
+<!--                    Wrapper element for contact information such 
+                        as address, phone, fax, email, url, country,
+                        etc.                                       -->
+<!ELEMENT  address      %address-model;                              >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  address
+             id         ID                                 #IMPLIED  >
+
+
+<!--                    ADDRESS LINE ELEMENTS                      -->
+<!--                    Elements for use in the <addr-line> element-->
+<!ENTITY % addr-line-elements 
+                        "%simple-text;"                              > 
+
+
+<!--                    ADDRESS LINE                               -->
+<!--                    One line in an address                     -->
+<!--                    Conversion Note: If the address is 
+                        undifferentiated data characters, the entire
+                        address may be inside one of these elements.
+                                                                   -->
+<!ELEMENT  addr-line    (#PCDATA %addr-line-elements;)*              >
+
+
+<!--                    COUNTRY:  IN AN ADDRESS                    -->
+<!ELEMENT  country      (#PCDATA)                                    >
+
+
+<!--                    EMAIL ADDRESS ELEMENTS                     -->
+<!--                    Elements to be mixed with #PCDATA inside the
+                        <email> element                            -->
+<!ENTITY % email-elements 
+                        " "                                          > 
+
+
+<!--                    EMAIL ADDRESS                              -->
+<!ELEMENT  email        (#PCDATA %email-elements;)*                  >
+<!--         xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ATTLIST  email
+             %might-link-atts;                                       >
+
+
+<!--                    FAX NUMBER ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <fax>                                    -->
+<!ENTITY % fax-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    FAX NUMBER: IN AN ADDRESS                  -->
+<!ELEMENT  fax          (#PCDATA %fax-elements;)*                    >
+
+
+<!--                    INSTITUTION NAME ELEMENTS                  -->
+<!--                    Elements for use in the <institution> 
+                        element                                    -->
+<!ENTITY % institution-elements 
+                        "| %break.class; | %emphasis.class; |
+                         %subsup.class;"                             > 
+
+
+<!--                    INSTITUTION NAME: IN AN ADDRESS            -->
+<!--                    Name of a institution or organization such as
+                        a university or corporation                -->
+                        
+<!ELEMENT  institution  (#PCDATA %institution-elements;)*            >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ATTLIST  institution
+             id         ID                                 #IMPLIED  
+             %might-link-atts;                                       > 
+
+
+<!--                    PHONE NUMBER ELEMENTS                      -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <phone number> 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %just-rendition; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % phone-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    PHONE NUMBER: IN AN ADDRESS                -->
+<!--                    A callable phone number in some telephone or
+                        wireless system somewhere in the world.
+                        Typically includes area code; may include
+                        country extension, especially for non-US.  -->
+<!ELEMENT  phone        (#PCDATA %phone-elements;)*                  >
+
+
+<!--                    URI ELEMENTS                               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <uri>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % uri-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    URI                                        -->
+<!--                    URI such as a URL that may be used as a 
+                        live link, typically naming a website, such 
+                        as:
+                           <url>http://www.mulberrytech.com</url>
+                        Alternatively the element content may name
+                        the URL, e.g., "Mulberry's Website" and the
+                        "xlink:href" attribute may hold the real
+                        URL.
+                           <url xlink:href="http://www.mulberrytech.
+                           com">Mulberry's Website</url>           
+                        Related Elements: A URI used outside the 
+                        context of an address of contributor should 
+                        be tagged as an External Link <ext-link>   -->
+<!ELEMENT  uri          (#PCDATA %uri-elements;)*                    >
+
+<!ATTLIST  uri
+             %might-link-atts;                                       >
+
+
+<!-- ============================================================= -->
+<!--                    DATE ELEMENTS (PUBLICATION HISTORY)        -->
+<!-- ============================================================= -->
+
+
+<!--                    DATE                                       -->
+<!--                    The elements <day>, <month>, and <year> should 
+                        ALWAYS be numeric values. The date may be 
+                        represented as a string in <string-date>, but
+                        the numeric values should be present whenever
+                        possible.                                  -->
+<!ELEMENT  date         %date-model;                                 >
+<!--         date-type  Attribute should only be used if the date
+                        is one of the known types, otherwise omit
+                        the attribute. Values are:
+                          accepted    - Date manuscript was 
+                                        accepted         
+                          received    - Date manuscript received
+                          rev-request - Date revisions were 
+                                        requested or manuscript 
+                                        was returned
+                          rev-recd    - Date revised manuscript 
+                                        was received               -->
+<!ATTLIST  date
+              date-type (%date-types;)                     #IMPLIED  >
+
+
+<!--                    DAY                                        -->
+<!--                    The numeric value of a day of the month, used
+                        in both article metadata and inside a citation,
+                        in two digits as it would be stated in the "DD" 
+                        in an international date format YYYY-MM-DD, for
+                        example "03", "25".                        -->
+<!ELEMENT  day          (#PCDATA)                                    >
+
+
+<!--                    MONTH                                      -->
+<!--                    Names one of the months of the year. Used in
+                        both article metadata and inside a citation,
+                        this element may contain a full month 
+                        "December", an abbreviation "Dec", or, 
+                        preferably, a numeric month such as "12".
+                        Authoring and Conversion Note: For ease in
+                        comparisons and searching, many archives
+                        prefer that months be converted to numeric
+                        Suggested values:
+                          1 = January
+                          2 = February
+                          3 = March, etc.                          -->
+<!ELEMENT  month        (#PCDATA)                                    >
+
+
+<!--                    SEASON                                     -->
+<!--                    Season of publication, such as "Spring". 
+                        Used in both article metadata and inside a 
+                        citation                                   -->
+<!ELEMENT  season       (#PCDATA)                                    >
+
+
+<!--                    YEAR                                       -->
+<!--                    Year of publication, which should be expressed
+                        as a 4-digit number: "1776" or "1924"      -->
+<!ELEMENT  year         (#PCDATA)                                    >
+
+
+<!--                    STRING DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-date> element                  -->
+<!ENTITY % string-date-elements 
+                        " | %date-parts.class;"                      >
+
+
+<!--                    DATE AS A STRING                           -->
+<!--                    This is a representation of the date as a 
+                        string. Usually used for dates for which 
+                        months and years are not given, but may be
+                        used for any date as a string (i.e., "January, 
+                        2001" "Fall 2001" "March 11, 2001".
+                        It is better practice to tag the year
+                        and month as numbers with a date such
+                        as "January, 2001" or "March 11, 2001".    -->
+<!ELEMENT  string-date  (#PCDATA %string-date-elements;)*            >
+
+
+<!-- ============================================================= -->
+<!--                    PERSON'S NAME ELEMENTS (BIBLIOGRAPHIC)     -->
+<!-- ============================================================= -->
+
+
+<!--                    STRING NAME ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <string-name> element                  -->
+<!ENTITY % string-name-elements 
+                        " | %person-name.class;"                     >
+
+
+<!--                    NAME OF PERSON (UNSTRUCTURED)              -->
+<!--                    Wrapper element for personal names where the
+                        stricter format of the <name> element cannot
+                        be followed. This is a very loose element,
+                        allowing data characters, generated text,
+                        and any or all of the naming elements.
+                        Authoring or Conversion Note: Use this
+                        element if the name parts are unknown or 
+                        untagged.                                  -->
+<!ELEMENT  string-name  (#PCDATA %string-name-elements;)*            >
+
+
+<!--                    NAME OF PERSON (STRUCTURED)                -->
+<!--                    Wrapper element for personal names.
+                        Authoring or Conversion Note: If the name
+                        parts are unknown or untagged, names should
+                        be placed within the <string-name> element. 
+                                                                   -->
+<!ELEMENT  name         (surname, given-names?, prefix?, suffix?)    >
+<!--         name-style Used for choosing an inversion algorithm or
+                        for sorting or other processing functions.  The
+                        three values and approximate meanings are:
+                        Value     Display          Sort/Inversion
+                        western   given family     family given
+                        eastern   family given     family given
+                        islensk   given patronymic given, patronymic
+                                                                   -->
+<!ATTLIST  name
+             name-style (western | eastern | islensk)      "western" >
+
+
+<!--                    SURNAME ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <surname>                                
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % surname-elements
+                        "%just-rendition; "                          >
+
+
+<!--                    SURNAME                                    -->  
+<!--                    The surname of an individual.  If there is
+                        only one name, for example, "Cher" or
+                        "Pele", that is considered to be a surname
+                        for consistency purposes.                  -->
+<!ELEMENT  surname      (#PCDATA %surname-elements;)*                >
+<!ATTLIST  surname
+             %surname-atts;                                          >
+
+
+<!--                    GIVEN (FIRST) NAMES ELEMENTS               -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <given-names>                            -->
+<!ENTITY % given-names-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    GIVEN (FIRST) NAMES                        -->
+<!--                    Includes all given names for a person, such 
+                        as the first name, middle names, maiden 
+                        name if used as part of the married name, 
+                        etc.)                                      -->
+<!ELEMENT  given-names  (#PCDATA %given-names-elements;)*            >
+<!ATTLIST  given-names
+             %given-names-atts;                                      >
+
+
+<!--                    PREFIX ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <prefix>  
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % prefix-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    PREFIX                                     -->
+<!--                    Honorifics or other qualifiers that usually 
+                        precede the surname, for example,  Professor, 
+                        Rev., President, Senator, Dr., Sir, The 
+                        Honorable, et al.                          -->
+<!ELEMENT  prefix       (#PCDATA %prefix-elements;)*                 >
+
+
+
+<!--                    SUFFIX ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <suffix>
+                        Design Note: This PE begins with an OR bar,
+                        it is inside %just-rendition;              -->
+<!ENTITY % suffix-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    SUFFIX                                     -->
+<!--                    Text used as a suffix to a person's name, for
+                        example: Sr. Jr. III, 3rd                  -->
+<!ELEMENT  suffix       (#PCDATA %suffix-elements;)*                 >
+
+
+<!-- ============================================================= -->
+<!--                    EXTERNAL LINK ELEMENTS                     -->
+<!-- ============================================================= -->
+
+
+<!--                    EXTERNAL LINK ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an <ext-link>  
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %link-elements; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % ext-link-elements
+                        "%link-elements;"                            >
+
+
+<!--                    EXTERNAL LINK                              -->
+<!--                    Link to an external file, such as Medline, 
+                        Genbank, etc.  Linking may be accomplished
+                        using the XLink linking attributes.        -->
+<!ELEMENT  ext-link     (#PCDATA %ext-link-elements;)*               >
+<!--         ext-link-type 
+                        Type of external link. Use this attribute
+                        if the type of external link is one of the
+                        ones below or another named type.
+                        Suggested values include:
+                            aoi         Astronomical Object Identifier 
+                            doi         Digital Object Identifier
+                            ec          Enzyme nomenclature - see
+                              http://www.chem.qmw.ac.uk/iubmb/enzyme/
+                            email       An email message
+                            ftp         File transfer protocol
+                            gen         GenBank identifier
+                            genpept     Translated Protein-encoding
+                                        sequence Database
+                            highwire    HighWire press intrajournal 
+                            medline     Medline or pubmed id
+                            pdb         Protein data bank. See 
+                                        http://www.rcsb.org/pdb/
+                            pgr         Plant gene register. See
+                                        http://www.tarweed.com/pgr/
+                            pir         Protein Information Resource
+                                        see http://pir.georgetown.edu
+                            pirdb       Protein Information Resource 
+                                        see http://pir.georgetown.edu
+                            pmc         Used to link between articles  
+                                        in PubMed Central access is 
+                                        PMID
+                            sprot       Swiss-Prot. See
+                                    http://www.ebi.ac.uk/swissprot/
+                            uri         Website or web service    
+             id         Unique identifier so the element may be
+                        referenced 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ATTLIST  ext-link
+             %ext-link-atts;                                         >
+
+
+<!-- ============================================================= -->
+<!--                    STRUCTURAL ELEMENTS                        -->
+<!-- ============================================================= -->
+
+
+<!--                    ATTRIBUTION ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        an attribution                          
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % attrib-elements
+                        "%emphasized-text;"                          >
+             
+
+<!--                    ATTRIBUTION                                -->
+<!--                    Source, author, formal thanks, or other 
+                        information (other than copyright material)
+                        concerning the origins of an extract, a poem
+                        <verse-group> or similar element.
+                        Formatting Note: Typically displayed on 
+                        a separate line (or lines, following the 
+                        material it concerns, inheriting that
+                        material's margins.                        --> 
+<!ELEMENT  attrib       (#PCDATA %attrib-elements;)*                 >
+
+
+<!--                    STRUCTURAL TITLE ELEMENTS                  -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <title> element  
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % struct-title-elements 
+                        "%simple-phrase; | %break.class;"            > 
+
+
+<!--                    TITLE                                      -->
+<!--                    Heading or title for a structural element
+                        such as a Section, Figure, Boxed Text, etc.-->
+<!ELEMENT  title        (#PCDATA %struct-title-elements;)*           >
+
+
+<!--                    LABEL ELEMENTS                             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <label> element                        -->
+<!ENTITY % label-elements 
+                        "| %emphasis.class; | %inline-display.class; | 
+                         %inline-math.class; | %subsup.class;"       >
+
+
+<!--                    LABEL OF A FIGURE, REFERENCE, ETC.         -->
+<!--                    The number and any prefix word that comes
+                        before, for example, the caption of a Figure,
+                        such as "Figure 3." or "Exhibit 2.".  This
+                        element can be used to preserve the prefix 
+                        number or label of an element, for example
+                        for a reference or citation "25." or
+                        "[Lapeyre 2002]". This can be useful when
+                        reconstructing untagged cross references.  -->                        
+<!ELEMENT  label        (#PCDATA %label-elements;)*                  >
+
+
+<!-- ============================================================= -->
+<!--                    RELATED ARTICLE ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    RELATED ARTICLE ELEMENTS                   -->
+<!--                    Elements allowed inside <related-article>  -->
+<!ENTITY % related-article-elements 
+                        "| %emphasis.class; |%references.class; | 
+                         %subsup.class;"                             >
+
+
+<!--                    RELATED ARTICLE INFORMATION                -->
+<!--                    Wrapper element, used as a container for 
+                        text links to a related article, possibly 
+                        accompanied by a very brief description
+                        such as "errata (correction)".
+                        Remarks: This element is slightly overloaded
+                        in that it has 2 uses, one inside the article
+                        metadata to name one or more related articles
+                        and as part of the link class, which can
+                        occur many places in textual content.
+                        This allows all such references, to 
+                        companion articles within the same journal,
+                        to a previous part of a multi-part article,
+                        to a news item that summarizes the article,
+                        to the article for which this article is
+                        a correction or addendum, etc. wherever 
+                        these occur in the article.                -->
+<!ELEMENT  related-article
+                        (#PCDATA %related-article-elements;)*        >
+<!--         id         Unique identifier so the element may be
+                        referenced
+             alt-form-of
+                        Exactly like the "alt-form-of" attribute
+                        used with <graphic>, this is an IDREF
+                        attribute which points to the ID of another
+                        <related-article> in the same document
+                         rather than to an external file.
+             related-article-type
+                          addendum      Additional material for an
+                                        article, generated too late
+                                        to be added to the main text
+                          commentary-article   
+                                        Used in an commentary or
+                                        editorial to link to the 
+                                        article on which it is
+                                        commenting
+                          companion     Used in an article to link 
+                                        to a companion (related
+                                        or sibling article) 
+                          corrected-article
+                                        Used in a correction to link 
+                                        to the article being 
+                                        corrected. Sometimes called
+                                        erratum.
+                          in-this-issue Related article in the same
+                                        journal issue
+                          letter        A letter to the publication
+                                        or a reply to such a
+                                        letter
+                          commentary    Used in an article to link 
+                                        to its associated commentary
+                                        or editorial 
+                          correction-forward
+                                        Used in an article to link
+                                        forward to its associated 
+                                        correction (rarely used)
+                          retracted-article
+                                        Used in a retraction to link 
+                                        to the article being retracted
+                          retraction-forward   
+                                        Used in an article to link
+                                        forward to its associated 
+                                        retraction (rare)
+             vol        Volume of the journal in which the related
+                        article exists.  The scope is limited to
+                        the journal; in which the current article
+                        resides.
+             page       Page number of the related article. Scope
+                        is limited to the volume of the journal in 
+                        which the current article resides. The 
+                        values should be a first page or a page 
+                        range.
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ATTLIST  related-article
+             %related-article-atts;                                  >
+
+
+<!-- ============================================================= -->
+<!--                    FRONT MATTER/BACK MATTER ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    ACKNOWLEDGMENTS MODEL                      -->
+<!--                    Content model for the <ack> element        -->
+<!ENTITY % ack-model    "%sec-opt-title-model;"                      > 
+
+
+<!--                    ACKNOWLEDGMENTS                            -->
+<!ELEMENT  ack          %ack-model;                                  >
+<!--         id         Unique identifier so the element may be
+                        referenced                                
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      -->
+<!ATTLIST  ack                                
+             id         ID                                 #IMPLIED
+             content-type
+                        CDATA                              #IMPLIED  >
+
+
+<!--                    BIOGRAPHY MODEL                            -->
+<!--                    Content model for the <bio> element        -->
+<!ENTITY % bio-model    "(title?, (%just-para.class;)+ ) "           > 
+
+
+<!--                    BIOGRAPHY                                  -->
+<!--                    Sort biography of a person, usually the
+                        author                                     
+                        Authoring Note:  The "xlink:href" attribute
+                        may be used to point to a graphic of the
+                        author or to his/her website, etc.         -->
+<!ELEMENT  bio          %bio-model;                                  >      
+<!--         id         Unique identifier so the element may be
+                        referenced 
+             rid        Points to the identifier of an author or
+                        authors                               
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename.               -->
+<!ATTLIST  bio
+             %bio-atts;                                              >
+
+
+<!--                    NOTES MODEL                                -->
+<!--                    Content model for the <notes> element      -->
+<!ENTITY % notes-model  "%sec-opt-title-model;"                      > 
+             
+
+<!--                    NOTES                                      -->
+<!--                    A container element for the notes that may
+                        appear at the end of an Article or at the 
+                        end of a Table.  For example, a typical
+                        end-of-article note is a "Note in Proof". 
+                        A Note in Proof contains late-breaking news 
+                        items or other material produced while the 
+                        article was  being typeset or was otherwise 
+                        in production, that therefore happened too 
+                        late to be included in the text of the 
+                        article. This is typically NOT peer-reviewed
+                        content and citations to other material is
+                        usually just integrated into the text, not
+                        listed separately in a References List.    -->
+<!ELEMENT  notes        %notes-model;                                >      
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             notes-type To identify the type of note, if the type can
+                        be/has been identified, for example,
+                        "note-in-proof"                            -->                     
+<!ATTLIST  notes
+             %notes-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    ACCESSIBILITY ELEMENTS                     -->
+<!-- ============================================================= -->
+
+
+<!--                    ALTERNATE TITLE TEXT FOR A FIGURE, ETC.    -->
+<!--                    Short phrase used to display or pronounce 
+                        as an alternative to providing the full
+                        graphic for accessibility display or 
+                        graphic-limited websites or devices. For 
+                        example, <alt-text> may be used to display 
+                        "behind" a figure or graphic.   
+                        Authoring and Conversion Note: Not to be used
+                        as a replacement for <caption>.            -->
+<!ELEMENT  alt-text     (#PCDATA)                                    >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->             
+<!ATTLIST  alt-text
+             id         ID                                 #IMPLIED  
+             xml:lang   NMTOKEN                            #IMPLIED  > 
+
+
+<!--                    LONG DESCRIPTION ELEMENTS                  -->
+<!--                    Elements to be mixed with data characters
+                        inside the <long-desc> element             -->
+<!ENTITY % long-desc-elements
+                        " "                                          >
+
+
+<!--                    LONG DESCRIPTION                           -->
+<!--                    Description or summary of the content of a 
+                        graphical object, table, or textual object
+                        such as a text box, used by some systems to
+                        make the object accessible, even to people
+                        or systems that cannot read/see/display the
+                        object.                                  
+                        Authoring and Conversion Note: Not to be used
+                        as a replacement for <caption>.            -->
+<!ELEMENT  long-desc    (#PCDATA %long-desc-elements;)               >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->                 
+<!ATTLIST  long-desc
+             id         ID                                 #IMPLIED  
+             xml:lang   NMTOKEN                            #IMPLIED  > 
+
+
+<!--                    DEFINITION LIST: DEFINITION MODEL          -->
+<!--                    Content model for the <def> element        -->
+<!ENTITY % def-model    "((%just-para.class;)+ )"                    > 
+
+  
+<!--                    DEFINITION LIST: DEFINITION                -->
+<!--                    Used in two senses:
+                        1) The definition, description, or other
+                        explanation of the word, phrase, or picture
+                        of a 2-part or definition list
+                        2) The definition or expansion of an
+                        abbreviation or acronym <abbrev>           -->
+<!ELEMENT  def          %def-model;                                  >
+<!--         id         Unique identifier so the element may be
+                        referenced 
+             rid        Points to the identifier of a term,
+                        so that a term and definition may be linked
+                                                                   -->
+<!ATTLIST  def                                
+             rid        IDREFS                             #IMPLIED 
+             id         ID                                 #IMPLIED  >
+
+
+<!-- ============================================================= -->
+<!--                    CUSTOMIZED METADATA ELEMENTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    CUSTOMIZED METADATA WRAPPER MODEL          -->
+<!--                    Content model for the <custom-meta-wrap> 
+                        element                                    -->
+<!ENTITY % custom-meta-wrap-model
+                        "(custom-meta+)"                             > 
+
+
+<!--                    METADATA DATA NAME FOR CUSTOM METADATA     -->
+<!--                    Some DTDs and schemas allow for metadata
+                        above and beyond that which can be specified
+                        by this DTD. This element is a wrapper 
+                        element used to contain all these additional
+                        metadata elements.                          -->
+<!ELEMENT  custom-meta-wrap
+                        %custom-meta-wrap-model;                      >
+
+
+<!--                    CUSTOMIZED METADATA MODEL                  -->
+<!--                    Content model for the <custom-meta> element-->
+<!ENTITY % custom-meta-model
+                        "(meta-name, meta-value)"                    > 
+
+
+<!--                    CUSTOM METADATA                            -->
+<!--                    Some DTDs and schemas allow for metadata
+                        above and beyond that which can be specified
+                        by this DTD. This element is used to capture
+                        metadata elements that have not been defined
+                        explicitly in the models for this DTD, so 
+                        that the intellectual content will not be lost.
+                        REMARKS:  The <custom-meta> element allows 
+                        for an infinite number of name/value pairs,
+                        with few constraints on the length or
+                        content of the value. This element will 
+                        probably be used for special cases, product-
+                        specific material, or other unusual
+                        metadata, for example the journal-history
+                        information preserved in at least one
+                        publisher's DTD.                           -->
+<!ELEMENT  custom-meta  %custom-meta-model;                          >
+
+
+<!--                    METADATA DATA NAME ELEMENTS                -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the <meta-name> element 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % meta-name-elements
+                        "%simple-phrase;"                            > 
+
+
+<!--                    METADATA DATA NAME FOR CUSTOM METADATA     -->
+<!--                    Some DTDs and schemas allow for metadata
+                        above and beyond that which can be specified
+                        by this DTD. The <custom-meta> element
+                        allow for an infinite number of name/value
+                        pairs, with few constraints on the length or
+                        content of the value. This element contains
+                        the name of the metadata field.            -->
+<!ELEMENT  meta-name    (#PCDATA %meta-name-elements;)*              >
+
+
+<!--                    METADATA DATA VALUE ELEMENTS               -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the <meta-value> element 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % meta-value-elements
+                        "%simple-phrase;"                            > 
+   
+
+<!--                    METADATA DATA NAME FOR CUSTOM METADATA     -->
+<!--                    Some DTDs and schemas allow for metadata
+                        above and beyond that which can be specified
+                        by this DTD. The <custom-meta> element
+                        allow for an infinite number of name/value
+                        pairs, with few constraints on the length or
+                        content of the value. This element contains
+                        the value of the metadata field that is named
+                        by the <meta-name> element.                -->
+<!ELEMENT  meta-value   (#PCDATA %meta-value-elements;)*             >
+
+
+
+<!-- ============================================================= -->
+<!--                    GENERATED TEXT OR PUNCTUATION              -->
+<!-- ============================================================= -->
+
+
+<!--                    X ELEMENTS                                 -->
+<!--                    Elements for use inside the <x> element    -->
+<!ENTITY % x-elements   " "                                          > 
+
+
+<!--                    X - GENERATED TEXT AND PUNCTUATION         -->
+<!--                    A container element to hold punctuation or
+                        other generated text, typically when 1) an
+                        archive decides not to have any text
+                        generated and thus to pre-generate such 
+                        things as commas or semicolons between 
+                        keywords or 2) when an archive receives text
+                        with <x> tags embedded and wishes to retain
+                        them.
+                          Remarks: This element is called "x" for
+                        historical reasons, since DTDs that use an
+                        element for generated punctuation have
+                        typically called it that.                  -->
+<!ELEMENT  x            (#PCDATA %x-elements;)*                      >
+
+
+<!-- ================== End Common (Shared) Elements Module ====== -->
+     
diff --git a/dtd/default-classes.ent b/dtd/default-classes.ent
new file mode 100644
index 0000000..ad71038
--- /dev/null
+++ b/dtd/default-classes.ent
@@ -0,0 +1,704 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Default Element Classes Module                    -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Default Element Classes Module v2.0 20040830//EN"
+Delivered as file "default-classes.ent"                            -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    To declare the Parameter Entities (PEs) used to   -->
+<!--             define the default element classes. Classes are   -->
+<!--             OR-groups of elements that are defined together   -->
+<!--             to be used in mixes and in Element Declarations.  -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called before all   -->
+<!--             content modules that declare elements, and after  -->
+<!--             the class customization module (if any).          -->
+<!--                                                               -->
+<!-- CONTAINS:   PEs that define the element classes to be used    -->
+<!--             in the Journal Archive and Interchange DTD Suite  -->
+<!--             modules.                                          -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             B. Tommie Usdin (Mulberry Technologies, Inc.)     -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+ 13. ACCESS CLASS
+     ### Customization Alert ###
+     a. Took <ext-link> out of -%access.class;. It did not belong.
+        It belongs in -%address-link.class;
+
+ 12. PARA CLASS
+     ### Customization Alert ###
+     a. Deleted -%para.class; 
+     b. Its place in the definition of the Paragraph <p> element 
+        will be taken by the -%p-elements; entity.
+     c. Its place in other mixes will be taken by the combination
+        of:
+        - %just-para.class; and 
+        - %rest-of-para.class;
+
+ 11. LINK CLASSES
+     ### Customization Alert ###
+     a. Deleted the following classes: 
+        - %link.class; 
+        - %inpara-address; 
+        - %ext-links.class;
+     b. Replaced above with four link classes: 
+           - %address-link.class; (the links used in addresses)
+           - %fn-link.class;      (just fn)
+           - %simple-link.class;  (the internal links, same)
+           - %article-link.class; (links for journal article)
+        as follows:
+           - All occurrences of -%ext-links.class; replaced with
+             the new class %address-links.class;     
+           - All occurrences of -%link.class; replaced with some
+             combination of the new link classes just named.
+        These were not usually DTD changes, just parameterization
+        changes.
+
+ 10. PERSON NAME/STRING-NAME - Allowed a looser name model 
+     <string-name> to be used anywhere <name> is used. This 
+     includes:
+      - Inside %references.class; 
+         (Therefore added to <citation>, <product>, 
+          <related-article>)
+      - New Parameter Entity %name.class; for types
+        of names: <name>, <string-name>, <collab>
+      - Inside %contrib-model; (which uses %name.class; thus
+        adding <string-name> to <contributor>)
+      - Inside <person-group> (in %name.class;)
+        
+  9. ROLE ELEMENT - Was added to the default references class 
+     %references.class;
+
+  8. DATES
+     a. Added new class -%date-parts.class; to hold all the
+        potential components of date, such as <year>, <day>,
+        etc.
+     b. Added <string-date> to default -%date.class;
+     
+  7. NEW IDENTIFICATION ELEMENTS
+     a. Added three new identification elements:
+      - ISSUE ID = new element for an identifier such as a DOI (as
+        opposed to an <issue> Issue Number) associated with a 
+        journal issue
+      - ISSUE TITLE = new element for a theme or special issue title
+      - VOLUME ID = new element for a theme or special issue title
+     b. These identification elements were:
+        - Added to <article-meta>
+        - Added to %references.class; (thus to <citation>,
+            <related-article>, and <product>)
+        - Defined in common module
+        - Added to several new Parameter Entities that are
+          named %nnn-elements; (Such Parameter Entities hold
+          the elements that may be mixed with #PCDATA inside
+          the element named "nnn".)
+
+  6. REFERENCES.CLASS - Added the following elements to the
+     - %references.class;:
+      - <issue-id>
+      - <issue-title>
+      - <page-range>
+      - <role>
+      - <string-name>
+      - <volume-id>
+      Thus adding them to:
+      - <citation>
+      - <related-article>
+      - <product>
+
+  5. DISPLAY BACK MATTER - Added <attrib> to %display-back-matter;
+     thus adding it to the following elements:
+      - <array>
+      - <boxed-text>
+      - <chem-struct-wrapper>
+      - <disp-quote>
+      - <fig>
+      - <graphic>
+      - <preformat>
+      - <table-wrap>
+      - <verse-group>
+        
+  4. ADDRESS ELEMENTS CLASS 
+     ### Customization Alert ###
+     - Redefined to remove <email> and <uri>       
+
+  3. MAKE CLASS NAMES EXPLICIT - Some classes did not have the
+     ".class" suffix. Renamed such classes to add the suffix.
+     ### Customization Alert ###
+     - %address-elements;    ==> to  -%address.class;
+     - %contrib-info;        ==> -%contrib-info.class;
+                                    (uri added to class)
+     - %display-back-matter; ==> -%display-back-matter.class;
+     - %block-math;          ==> -%block-math.class;
+     - %inline-math;         ==> -%inline-math.class;
+
+  2. NEW CLASSES - To correct potential classing problems, added 
+     the following new Parameter Entities and added a few new 
+     comments:
+     
+     New Classes:
+        - %app.class;
+        - %corresp.class;
+        - %def.class;
+        - %degree.class;
+        - %fn-link.class;
+        - %front-back.class; and %sec-back.class;
+             changed the following to use them
+               %doc-back-matter-mix;
+               %sec-back-matter-mix;
+        - %just-base-display.class;
+             and used it in 
+               %chem-struct-wrapper-model;
+               %array-model;
+               %fig-group-model; 
+        - %just-para.class;
+             used in <author-comment>, <bio>, <def>, 
+               <caption>, %fig-model;
+        - %just-table.class;
+        - %kwd.class;
+        - %back.class;
+        - %front-back.class;
+        - %ref-list.class;
+        - %sec-back.class;
+        - %table-foot.class;
+        - %tbody.class;
+                
+  1. Created this module as version "v2.0 20040830"                -->
+
+
+<!-- ============================================================= -->
+<!--                    CLASSES FOR COMMON ELEMENTS (%common.ent;) -->
+<!-- ============================================================= -->
+
+
+<!--                    ADDRESS CLASS ELEMENTS                     -->
+<!--                    Potential element components of an address;
+                        not a proper class                         -->
+<!ENTITY % address.class
+                        "addr-line | country | fax | 
+                         institution | phone "                       >
+
+
+<!--                    CITATION CLASS ELEMENTS                    -->
+<!--                    Reference to an external document, as used 
+                        within, for example, the text of a 
+                        paragraph                                  -->
+<!ENTITY % citation.class   
+                        "citation"                                   >
+
+
+<!--                    DEFINITION CLASS ELEMENTS                  -->
+<!--                    Definitions and other elements to match
+                        with terms and abbreviations               -->
+<!ENTITY % def.class    "def"                                        >
+
+
+<!--                    DEGREE CLASS                               -->
+<!--                    The academic or professional degrees that
+                        accompany a person's name                  -->
+<!ENTITY % degree.class "degrees"                                    >
+
+
+<!--                    IDENTIFIER CLASS ELEMENTS                  -->
+<!--                    DOIs and other identifiers are used by
+                        publishers at many levels, for example for
+                        an <abstract> or a <figure>.               -->
+<!ENTITY % id.class     "object-id"                                  >
+
+
+<!--                    LABEL CLASS                                -->
+<!--                    The label element, used to hold the number
+                        or character of a labeled object such as a
+                        table or footnote                          -->
+<!ENTITY % label.class  "label"                                      >
+
+
+<!--                    NAMES CLASS                                -->
+<!--                    The elements used to name the personal names
+                        for individuals and the collaboration names
+                        for groups                                 -->
+<!ENTITY % name.class   "collab | name | string-name"                >
+
+
+<!--                    PERSONAL NAMES CLASS                       -->
+<!--                    The element components of a person's name,
+                        for the name of a contributor              -->
+<!ENTITY % person-name.class
+                        "given-names | prefix | surname | suffix"    >
+
+
+<!-- ============================================================= -->
+<!--                    ARTICLE METADATA CLASSES %articlemeta.ent; -->
+<!-- ============================================================= -->
+
+
+<!--                    CONTRIBUTOR INFORMATION                    -->
+<!--                    Metadata about a contributor               -->
+<!ENTITY % contrib-info.class
+                        "address | aff | author-comment | bio |  
+                         email |  etal | ext-link | on-behalf-of |
+                         role | uri | xref"                          >
+
+
+<!--                    CONFERENCE CLASS                           -->
+<!--                    The element components of the description
+                        of a conference; not a proper class        -->
+<!ENTITY % conference.class   
+                        "conf-date | conf-name | conf-num | 
+                         conf-loc | conf-sponsor | conf-theme |
+                         conf-acronym"                               >
+
+
+<!--                    CORRESPONDING AUTHOR CLASS                 -->
+<!--                    Elements associated with the corresponding
+                        author                                     -->
+<!ENTITY % corresp.class
+                        "corresp"                                    >
+
+
+<!--                    DATE CLASS ELEMENTS                        -->
+<!--                    Dates and other matters of history         -->
+<!ENTITY % date.class   "date | string-date"                         >
+
+
+<!--                    DATE PARTS CLASS ELEMENTS                  -->
+<!--                    Components of date-style elements          -->
+<!ENTITY % date-parts.class   
+                        "day | month | season | year"                >
+
+
+<!--                    KEYWORD CLASS ELEMENTS                     -->
+<!--                    Keywords and any keyword-synonyms          -->
+<!ENTITY % kwd.class    "kwd"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER CLASSES (%backmatter.ent;)     -->
+<!-- ============================================================= -->
+
+
+<!--                    JUST APPENDIX CLASS                        -->
+<!--                    The appendix and only the appendix         -->
+<!ENTITY % app.class   
+                        "app"                                        >
+
+
+<!--                    BACK MATTER CLASS                          -->
+<!--                    Ancillary elements, typically used in the
+                        back matter of an article, section, etc.   -->
+<!ENTITY % back.class   "ack | app-group | bio | fn-group | 
+                         glossary |  ref-list"                       >
+
+
+<!--                    FRONT MATTER CLASS                         -->
+<!--                    Ancillary elements, typically used in the
+                        front matter of an article, book, etc.  .  -->
+<!ENTITY % front.class  "ack | bio | fn-group | glossary"            >   
+
+
+<!--                    FRONT AND BACK CLASS                       -->
+<!--                    Ancillary elements, typically used in the
+                        front or back matter of an article         -->
+<!ENTITY % front-back.class
+                        "notes"                                      >
+
+
+<!--                    SECTION BACK MATTER CLASS                  -->
+<!--                    Ancillary elements, typically used in the
+                        back matter of a section, etc.             -->
+<!ENTITY % sec-back.class   
+                        "fn-group | glossary |  ref-list"            >
+
+
+<!--                    JUST REF-LIST CLASS                        -->
+<!--                    The reference list and only the reference
+                        list (The element <ref-list> is defined in
+                        %references.ent;.)                         -->
+<!ENTITY % ref-list.class   
+                        "ref-list"                                   >
+
+
+<!-- ============================================================= -->
+<!--                    DISPLAY CLASSES                            -->
+<!-- ============================================================= -->
+
+
+<!--                    ACCESSIBILITY CLASS ELEMENTS               -->
+<!--                    Elements added to make it easier to process
+                        journal articles in ways that are more
+                        accessible to people and devices with special
+                        needs, for example the visually handicapped.
+                          <alt-text> is a short phrase description of
+                        an objects, <long-desc> is a more complete
+                        description of the content or intent of an
+                        object, and the <ext-link> in this grouping
+                        would point to an alternate form of the
+                        object.                                    -->
+<!ENTITY % access.class "alt-text | long-desc"                       >
+
+
+<!--                    DISPLAY CLASS ELEMENTS                     -->
+<!--                    Graphical or other image-related elements.
+                        The display elements may occur within 
+                        the text of a table cell or paragraph
+                        although they are typically at the same 
+                        hierarchical level as a paragraph.         -->
+<!ENTITY % block-display.class
+                        "array | boxed-text | chem-struct |
+                         chem-struct-wrapper | fig | fig-group | 
+                         graphic | media | preformat | 
+                         supplementary-material | table-wrap |
+                         table-wrap-group"                           >
+
+
+<!--                    CAPTION DISPLAY ELEMENTS                   -->
+<!--                    Basic figure display elements              -->
+<!ENTITY % caption.class
+                        "caption"                                    >
+
+
+<!--                    DISPLAY ELEMENT BACK MATTER ELEMENTS       -->
+<!--                    Miscellaneous stuff at the end of a display
+                        element such as a figure or a boxed text
+                        element such as a sidebar                  -->
+<!ENTITY % display-back-matter.class
+                        "attrib | copyright-statement"               >
+                            
+
+<!--                    FIGURE DISPLAY ELEMENTS                    -->
+<!--                    Basic figure display elements              -->
+<!ENTITY % fig-display.class
+                        "fig"                                        >
+
+
+<!--                    INLINE DISPLAY CLASS ELEMENTS              -->
+<!--                    Non-block display elements that set or
+                        display inline with the text               -->
+<!ENTITY % inline-display.class
+                        "inline-graphic | private-char"              >
+                            
+
+<!--                    MOST BASIC DISPLAY ELEMENTS                -->
+<!--                    Just the few display elements that are
+                        simple display objects: a picture, a movie,
+                        a sound file.                              -->
+<!ENTITY % just-base-display.class
+                        "graphic | media"                            >
+                            
+
+<!--                    SIMPLE DISPLAY ELEMENTS                    -->
+<!--                    The simplest and most basic of the Display
+                        Class elements, which may be allowed in many
+                        places, for example, inside other Display
+                        Class elements or inside the cell of a
+                        Table                                      -->
+<!ENTITY % simple-display.class
+                        "array | chem-struct | graphic | media | 
+                         preformat"                                  >
+
+
+<!--                    SIMPLE TABLE DISPLAY ELEMENTS              -->
+<!--                    Very similar to the simple-display.class, but
+                        Table Wrappers <table-wrap> should contain
+                        <table>s, <oasis:table>s, etc., not
+                        arrays.                                    -->
+<!ENTITY % simple-intable-display.class
+                        "chem-struct | graphic | media | preformat"  >
+
+
+<!-- ============================================================= -->
+<!--                    FORMAT CLASSES (%format.ent;)              -->
+<!-- ============================================================= -->
+
+
+<!--                    APPEARANCE CLASS ELEMENTS                  -->
+<!--                    Names those elements (inherited from the
+                        XHTML table DTD that are only concerned with
+                        appearance, not with structure or content.
+                        Use of these elements is to be discouraged.-->
+<!ENTITY % appearance.class   
+                        "font | hr"                                  >
+
+
+<!--                    FORCED BREAK FORMATTING CLASS ELEMENTS     -->
+<!--                    Element to force a formatting break such as
+                        a line break                               -->
+<!ENTITY % break.class  "break"                                      >
+
+
+<!--                    EMPHASIS/RENDITION ELEMENTS                -->
+<!--                    Elements concerning with marking the location
+                        of typographical emphasis (highlighting)
+                        DTD DESIGN NOTE: There are no emphasis
+                        elements for <fractur>, <openface> (black
+                        board), <script>, etc. because this DTD
+                        recommends the use of the STIX extensions
+                        to accomplish this, as soon as they are 
+                        available.                                  -->
+<!ENTITY % emphasis.class   
+                        "bold | italic | monospace | 
+                         overline | overline-start | overline-end | 
+                         sc | strike | underline | 
+                         underline-start | underline-end "           >
+
+
+<!--                    UP/DOWN RENDITION ELEMENTS                 -->
+<!ENTITY % subsup.class "sub | sup"                                  >
+
+
+<!-- ============================================================= -->
+<!--                    LINK CLASSES (%link.ent;)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    ADDRESS LINK CLASS ELEMENTS                -->
+<!--                    Link elements that can be used inside 
+                        addresses. This is essentially the three
+                        generic external links.
+                        (Note: in earlier releases, this Parameter
+                        Entity was named %address-elements;,
+                        although it functioned as a class.)        -->
+<!ENTITY % address-link.class   
+                        "email | ext-link | uri"                     >
+
+
+<!--                    JOURNAL ARTICLE LINK CLASS ELEMENTS        -->
+<!--                    Links used inside journal articles, to point
+                        to related material                        -->
+<!ENTITY % article-link.class   
+                        "inline-supplementary-material | 
+                         related-article"                            >
+
+
+<!--                    FOOTNOTE LINKS CLASS                       -->
+<!--                    Only the most basic, internal links        -->
+<!ENTITY % fn-link.class   
+                        "fn"                                         >
+
+
+<!--                    RELATED ARTICLE LINKS CLASS                -->
+<!--                    For using <related-article> at the paragraph
+                        level                                      -->
+<!ENTITY % related-article.class   
+                        "related-article"                            >
+
+
+<!--                    SIMPLE LINKS/CROSS-REFERENCES CLASS        -->
+<!--                    The smaller and simpler linking elements
+                        that might be inside, for example, a
+                        Keyword <kwd>                              -->
+<!ENTITY % simple-link.class   
+                        "fn | target | xref"                         >
+
+
+<!-- ============================================================= -->
+<!--                    LIST CLASSES (%list.ent;)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    LIST CLASS ELEMENTS                        -->
+<!--                    All the types of lists that may occur 
+                        as part of the text, therefore excluding
+                        Bibliographic Reference Lists <ref-list>   -->
+<!ENTITY % list.class   "def-list | list"                            >
+
+
+<!-- ============================================================= -->
+<!--                    MATH CLASSES (%math.ent;)                  -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHEMATICAL EXPRESSIONS AND FORMULAE MIX  -->
+<!ENTITY % block-math.class
+                        "disp-formula"                               >
+
+
+<!--                    INLINE MATHEMATICAL EXPRESSIONS MIX        -->
+<!ENTITY % inline-math.class
+                        "inline-formula"                             >
+
+
+<!--                    MATHEMATICAL EXPRESSIONS                   -->
+<!ENTITY % math.class   "tex-math | mml:math"                        >
+
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH CLASSES (%para.ent;)             -->
+<!-- ============================================================= -->
+
+
+<!--                    REST OF PARAGRAPH CLASS                    -->
+<!--                    Information for the reader that is at the
+                        same structural level as a Paragraph.
+                        Contains all paragraph-level objects that are
+                        not also used inside tables and excepting
+                        also the paragraph element itself          -->
+<!ENTITY % rest-of-para.class   
+                        "ack | disp-quote | speech | statement | 
+                         verse-group"                                >
+
+
+<!--                    IN TABLE PARAGRAPH CLASS                   -->
+<!--                    The simpler of the paragraph-level elements
+                        that might be found inside a table cell    -->
+<!ENTITY % intable-para.class                                   
+                        "disp-quote | speech | statement | 
+                         verse-group"                                >
+
+
+<!--                    JUST PARAGRAPH CLASS                       -->
+<!--                    To hold the Paragraph element, alone.      -->
+<!ENTITY % just-para.class   
+                        "p"                                          >
+
+
+<!-- ============================================================= -->
+<!--                    PHRASE CLASSES (%phrase.ent;)              -->
+<!-- ============================================================= -->
+
+
+<!--                    PHRASE CLASS ELEMENTS                      -->
+<!--                    Small inline elements, that surround a word
+                        or phrase in the text because the subject
+                        (content) should be identified as something
+                        special or different                       -->
+<!ENTITY % phrase.class "abbrev | named-content"                     >
+
+
+<!-- ============================================================= -->
+<!--                    REFERENCES CLASSES (%references.ent;)      -->
+<!-- ============================================================= -->
+
+
+<!--                    BIBLIOGRAPHIC REFERENCE (CITATION) CLASS   -->
+<!--                    The elements that may be included inside a
+                        Citation (bibliographic reference)         -->
+<!ENTITY % references.class
+                        "access-date | annotation | article-title | 
+                         collab | comment | 
+                         conf-date | conf-loc | conf-name | 
+                         day | edition | email | elocation-id | 
+                         etal | ext-link | fpage |  gov | isbn | 
+                         issn | issue | issue-id | issue-title | 
+                         lpage | month | name | object-id |  
+                         page-count | page-range | 
+                         patent | person-group | pub-id | 
+                         publisher-loc | publisher-name | 
+                         role | season |
+                         series | source | std | string-name |
+                         supplement | time-stamp | trans-source | 
+                         trans-title | uri |
+                         volume | volume-id | year"                  >
+
+
+
+<!--                    JUST REF-LIST CLASS                        -->
+<!--                    The reference list and only the reference
+                        list                                       -->
+<!ENTITY % ref-list.class   
+                        "ref-list"                                   >
+
+
+<!-- ============================================================= -->
+<!--                    SECTION CLASS (%section.ent;)              -->
+<!-- ============================================================= -->
+
+<!--                    SECTION CLASS ELEMENTS                     -->
+<!--                    Information for the reader that is at the
+                        same structural level as a Section, which is
+                        a headed structure full of smaller elements
+                        such as paragraphs.                        -->
+<!ENTITY % sec.class    "sec"                                        >
+
+
+<!-- ============================================================= -->
+<!--                    TABLE MODEL CLASSES                        -->
+<!-- ============================================================= -->
+                            
+
+<!--                    JUST TABLE CLASS                           -->
+<!--                    To include just a table <tale-wrap> 
+                        element                                    -->
+<!ENTITY % just-table.class
+                        "table-wrap"                                 >
+
+
+<!--                    TABLE CLASS ELEMENTS                       -->
+<!--                    Elements that will be used to contain the
+                        rows and columns inside the Table Wrapper 
+                        element <table-wrap>.  The following elements 
+                        can be set up for inclusion:
+                          XHTML Table Model    table               -->
+<!ENTITY % table.class  "table"                                      >
+                            
+
+<!--                    TABLE FOOT CLASS                           -->
+<!--                    Elements to include at the end of a table
+                        in the table.                              -->
+<!ENTITY % table-foot.class
+                        "table-wrap-foot"                            >
+                            
+
+<!--                    TBODY CLASS                                -->
+<!--                    To include just a table <tale-wrap> 
+                        element                                    -->
+<!ENTITY % tbody.class  "tbody"                                      >
+
+              
+              
+<!-- ================== End Journal Suite Default Classes  ======= -->
diff --git a/dtd/default-mixes.ent b/dtd/default-mixes.ent
new file mode 100644
index 0000000..89fe9e0
--- /dev/null
+++ b/dtd/default-mixes.ent
@@ -0,0 +1,357 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Default Element Mixes Module                      -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Default Element Mixes Module v2.0 20040830//EN"
+Delivered as file "default-mixes.ent"                              -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Journal Archiving and Interchange DTD of the      -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Declares default values for all the element mixes -->
+<!--             used in the content models of the DTD Suite       -->
+<!--                                                               -->
+<!--             Mixes are Or-groups of classes, used in many      -->
+<!--             different content models. Mixes should not use    -->
+<!--             element names directly, only through classes.     -->
+<!--                                                               -->
+<!--             Note: Since PEs must be declared before they      -->
+<!--             are used, this module must be called after the    -->
+<!--             customize mixes module (if any).                  -->
+<!--                                                               -->
+<!-- CONTAINS:   1) PEs that define the element mixes (such as     -->
+<!--                phrase-level elements, para-level elements,    -->
+<!--                inside-a-table-cell elements)                  -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital Archive of Journal Articles               -->
+<!--             National Center for Biotechnology Information     -->
+<!--                (NCBI)                                         -->
+<!--             National Library of Medicine (NLM)                -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             August 2004                                       -->
+<!--                                                               -->
+<!-- CREATED BY: Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             B. Tommie Usdin (Mulberry Technologies, Inc.)     -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             this DTD should be sent in email to:              -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-07-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  3. INLINE MATH CLASS - Added to everywhere %inline-display; was 
+     including:
+      - %simple-text; (via %all-phrase;)
+      - %emphasized-text; (via %all-phrase;)
+      
+  2. PARAMETER ENTITY CLEANUP AND REGULARIZATION
+
+     a. RENAME EXISTING CLASSES
+        ### Customization Alert ###
+        Some classes did not have the ".class" suffix. Changed the 
+        names to add the class suffix:
+        - %block-math.class; used in 
+           - %para-level;
+           - %inside-cell; 
+           - %inside-para; [now renamed -%p-elements;] 
+        - %inline-math.class; used in 
+           - %emphasized-text;
+           - %inside-cell; 
+           - %simple-phrase; and
+           - %inside-para; [now renamed -%p-elements;])
+ 
+     b. MODIFY PARA-LEVEL MIX
+        ### Customization Alert ###
+        New Parameter Entities in %para-level; (No model change.)
+        - %para.class; is replaced by the combination of:
+           - %just-para.class; and
+           - %rest-of-para.class;
+
+     c. LINK CLASSES
+        - Replaced %link.class; with the following classes (no DTD 
+          change):
+           - %address-link.class;  (external links in addresses)
+           - %article-link.class;  (links for journal article)
+           - %simple-link.class;   (the internal links)
+          in the following Parameter Entities:
+            - %emphasized-text;
+            - %inside-cell;
+            - %p-elements;
+            - %simple-phrase;
+        - Deleted -%inpara-address; from -%inside-para;
+          (which has been modified and renamed -%p-elements;) 
+          (No DTD change, -%address-link.class; covers it.)
+
+     d. INLINE PARAMETER MIXES
+         ### Customization Alert ###
+        Changed the inline-mix Parameter Entities to use the 
+        OR-bar-first mechanism. This requires changing not
+        only the Parameter Entity, but all content models that
+        use the entity.
+        - %emphasized-text; (used in most of the format
+            elements)
+
+     e. -ELEMENT AND -MODEL SUFFIXES
+         ### Customization Alert ###
+         RENAME ELEMENT MIXES NOT TO END IN "-elements", since that
+         suffix is reserved for mixes that are added to #PCDATA for
+         a particular element
+         - %doc-back-matter-elements; ==> -%doc-back-matter-mix;
+         - %sec-back-matter-elements; ==> -%sec-back-matter-mix;
+         - Deleted the element mix "inside-para" and replaced it
+           with "%p-elements;"
+                
+  1. Created this module as version "v2.0 20040830"                -->
+                          
+                        
+<!-- ============================================================= -->
+<!--                    ELEMENT MIXES FOR USE IN CONTENT MODELS    -->
+<!--                    (MIXES ARE COMPOSED USING CLASSES)         -->
+<!-- ============================================================= -->
+
+
+<!--                    SECTION-LEVEL ELEMENTS                     -->
+<!--                    Elements that may be used at the same
+                        structural level as a Section for example
+                        inside the Body <body>                     -->
+<!ENTITY % sec-level    "%sec.class;"                                >
+                         
+
+<!-- ============================================================= -->
+<!--                    BACK MATTER ELEMENT MIXES(%backmatter.ent;)-->
+<!-- ============================================================= -->
+
+
+<!--                    DOCUMENT BACK MATTER ELEMENTS              -->
+<!--                    Back Matter Elements used by a full document
+                        such as a journal article. This is an element
+                        grouping rather than a class. These 
+                        elements may also appear in the content models 
+                        of structural elements, such as back matter.
+                        (Note: Technically this should have used
+                        %sec.class;, but %sec-level; was used in an
+                        earlier release and backwards compatibility
+                        must be maintained.                        -->
+<!ENTITY % doc-back-matter-mix
+                        "%back.class; | %front-back.class; | 
+                         %sec-level;"                                >
+
+
+<!--                    SECTION BACK MATTER ELEMENTS               -->
+<!--                    Back matter elements used inside smaller
+                        structures, such as sections and sidebars  -->
+<!ENTITY % sec-back-matter-mix
+                        "%front-back.class; | %sec-back.class;"      >
+                         
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH-LEVEL ELEMENT MIXES              -->
+<!-- ============================================================= -->
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!--                    Elements that may be used at the same
+                        structural level as a paragraph, for 
+                        example inside a Section
+                        Note: There a major overlap between this
+                        parameter entity and that for the elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a 
+                        paragraph, but block elements such as quotes 
+                        and lists may appear either within a 
+                        paragraph or at the same level as a 
+                        paragraph. This serves a requirement in a 
+                        repository DTD, since some incoming material 
+                        will have restricted such elements to only 
+                        inside a paragraph,  some incoming material 
+                        will have restricted them to only outside a 
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.                      -->
+<!ENTITY % para-level   "%block-display.class; | %block-math.class; | 
+                         %just-para.class; | %list.class; | 
+                         %math.class; | %related-article.class; |
+                         %rest-of-para.class;"                       >
+
+                         
+<!-- ============================================================= -->
+<!--                    TABLE ELEMENT MIXES                        -->
+<!-- ============================================================= -->
+                          
+
+<!--                    INSIDE TABLE CELL ELEMENTS                 -->
+<!--                    Mixed with #PCDATA inside a table cell, such
+                        as a <td> or <th> element in the XHTML table
+                        model, the <entry> element in the OASIS CALS
+                        table model, etc.  This PE will be used as the
+                        value of %Flow.mix;, %paracon;, etc.
+                        ### Usage Alert ###
+                        Design Note: Inside cell is an exception, an
+                        inline mix that does not start with an OR
+                        bar. This is because is used within the
+                        PE -%Flow.mix;, which is an inline mix
+                        defined in the course of the XHTML Table DTD,
+                        a DTD not under control of this DTD Suite. -->
+<!ENTITY % inside-cell  "%address-link.class; |  %appearance.class; |
+                         %article-link.class; |
+                         %block-math.class; | %break.class; | 
+                         %citation.class; | %emphasis.class; | 
+                         %inline-display.class; |
+                         %inline-math.class; | 
+                         %list.class; | %math.class; | 
+                         %phrase.class; | %simple-display.class; | 
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!--                    INSIDE TABLE WRAPPER ELEMENTS              -->
+<!--                    Usually a Table Wrapper contains a table,
+                        properly tagged with rows and columns, but
+                        sometimes, a structure that is labeled as
+                        a "table" is actually a list, or two
+                        paragraphs.  This Parameter Entity names
+                        all the alternatives to table that may 
+                        occur inside a table wrapper.              -->
+<!ENTITY % inside-table-wrapper
+                        "%intable-para.class; | %list.class; | 
+                         %simple-intable-display.class;  |  
+                         %table.class;"                              >
+
+
+<!-- ============================================================= -->
+<!--                    INLINE ELEMENT MIXES                       -->
+<!-- ============================================================= -->
+
+
+<!--                    EMPHASIS MIX ELEMENTS                      -->
+<!--                    Elements that may be used inside most of the
+                        emphasis class elements                    
+                        DESIGN NOTE: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % emphasized-text  
+                        "| %address-link.class; | 
+                         %article-link.class; |  %emphasis.class;  | 
+                         %inline-display.class; | 
+                         %inline-math.class; |  
+                         %math.class; |  %phrase.class; | 
+                         %simple-link.class; | %subsup.class;"       >
+                         
+
+<!--                    JUST RENDITION                             -->
+<!--                    Only the simplest of the typographic 
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be stripped down to only
+                        subscript and superscript by some, more
+                        restrictive DTDs.                         
+                        DTD Maintenance Note: This Parameter Entity
+                        and the related PE "rendition-plus" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to change similar models individually .   
+                        DESIGN NOTE: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % just-rendition
+                        "| %emphasis.class;  | %subsup.class;"       >
+                         
+
+<!--                    RENDITION MARKUP PLUS                      -->
+<!--                    Only the simplest of the typographic 
+                        emphasis elements, as well as subscript and
+                        superscript.  Usually used in a model that
+                        allows #PCDATA and this restricted mixture.
+                        This mix may be enhanced slightly in some
+                        more permissive DTDs, and should always
+                        contain at least typographic emphasis, 
+                        subscript, and superscript.  
+                        DTD Maintenance Note: This Parameter Entity
+                        and the related PE "Just-rendition" have
+                        been put in place to restrict the amount of
+                        variability that a person modifying the DTD
+                        through PE redefinition can achieve. Some
+                        elements have been set #PCDATA plus one PE
+                        and some have been set to #PCDATA plus the
+                        other in an effort to allow designers to
+                        modify entire groups of elements, but not
+                        to individually change similar models. 
+                        modify entire groups of elements, but not
+                        to change similar models individually .     
+                        DESIGN NOTE: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % rendition-plus                             
+                        "| %emphasis.class;  | %subsup.class;"       >
+
+
+<!--                    SIMPLE PHRASE-LEVEL TEXTUAL ELEMENTS       -->
+<!--                    Elements that may be used almost anywhere
+                        text is used, for example, inside a title.
+                        Simple text plus inline display and math 
+                        elements.                                  
+                        DESIGN NOTE: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % simple-phrase
+                        "| %address-link.class; |
+                         %article-link.class; | 
+                         %emphasis.class; | %inline-display.class; | 
+                         %inline-math.class; | %math.class; | 
+                         %phrase.class; | 
+                         %simple-link.class; | %subsup.class;"       >
+
+
+<!--                    SIMPLE TEXTUAL CONTENT                     -->
+<!--                    Elements that may be used inside elements
+                        that are really expected to be #PCDATA and
+                        not to contain any of these things.
+                        Note that there is no math and no links.
+                        Simpler even than %simple-phrase;        
+                        DESIGN NOTE: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % simple-text  "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; | %phrase.class; | 
+                         %subsup.class; "                            >
+
+
+<!-- ================== End Archiving DTD Mixes Customization ==== -->
diff --git a/dtd/display.ent b/dtd/display.ent
new file mode 100644
index 0000000..184bf52
--- /dev/null
+++ b/dtd/display.ent
@@ -0,0 +1,1468 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Display Class Elements                            -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Display Class Elements  v2.0 20040830//EN"
+     Delivered as file "display.ent"                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Describes display-related elements such as        -->
+<!--             Figures, Graphics, Math, Chemical Structures,     -->
+<!--             Graphics, etc.                                    -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Parameter Entities for attribute lists         -->
+<!--             2) Parameter Entities for content models          -->
+<!--             3) The display class elements (alpha order)       -->
+<!--                a) Array                                       -->
+<!--                b) Boxed text                                  -->
+<!--                c) Chemical Structure                          -->
+<!--                d) Figure                                      -->
+<!--                e) Graphic                                     -->
+<!--                f) Inline Graphic                              -->
+<!--                g) Pre-formatted text                          -->
+<!--                e) Supplementary Information                   -->
+<!--                h) Table Group                                 -->
+<!--                i) Table Wrapper                               -->
+<!--                j) Table (invoked module)                      -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+ 19. OTHER-TABLE-WRAP-ATTS - Moved this Parameter Entity from
+     the Archiving (Green) customization module to this module,
+     so that all variant DTDs could use it. Possible for both 
+     <table-wrapper> and <table-group>.
+
+ 18. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now,
+     as this is the most flexible system, allowing for
+     #PCDATA, mixed, or element content. (This is in direct
+     contrast to the "-element" suffixed models, which are
+     designed to prohibit element content and permit only
+     #PCDATA or mixed content.) Added parentheses to Parameter
+     Entity and removed them from the Element Declaration.
+     -  %array-model; 
+     -  %boxed-text-model; 
+     -  %chem-struct-wrapper-model; 
+     -  %fig-model; 
+     -  %fig-group-model; 
+     -  %preformat-model; 
+     -  %table-wrap-model; 
+     -  %table-wrap-group-model; 
+     -  %table-wrap-foot-model; 
+
+ 17. LOOSENING FIGURE - %label.class; and %caption.class; both 
+     allowed to repeat in <fig> model, to allow for alternate
+     placements.
+     
+ 16. OBJECT ID/DOI - added to elements by request of AIT WG. 
+     Elements with DOIs are those a publisher could expect to sell 
+     or handle separately. DOI is placed in an <object-id> element, 
+     part of the %id.class; and added to:
+      - <boxed-text>             (through %boxed-text-model;)
+      - <chem-struct-wrapper>    (through %chem-struct-wrapper-model;)
+      - <fig>                    (through %fig-model;)
+      - <graphic>                (through %graphic-model;)
+      - <media>                  (through %graphic-model;)
+      - <pre-format>             (through %preformat-elements;)
+      - <supplementary-material> (through %fig-model;)
+      - <table-wrap>             (through %table-wrap-model;) 
+
+     A "pub-id-type" attribute identifies the type of ID, DOI,
+     archive-issued ID, etc.
+
+      
+ 15. PARAMETER ENTITY CLEANUP AND REGULARIZATION
+
+     a. RENAME EXISTING CLASSES
+        ### Customization Alert ###
+        Some classes did not have the ".class" suffix. Changed the 
+        names to add the class suffix:
+        - %display-back-matter.class; used in 
+             -%array-model;      -%boxed-text-model;
+             -%fig-model;        -%chem-struct-wrapper-model;
+             -%graphic-model;    -%preformat-model;  
+             -%table-wrap-model; -%table-wrap-foot-model; 
+        - %block-math.class; (used in -%fig-model;)
+
+     b. INLINE MIXES USE OR BARs
+        ### Customization Alert ###
+        Changed the following PEs to start with an OR bar:
+        - %preformat-elements;
+
+     c. NEW CLASSES - To correct potential classing problems, new 
+        Parameter Entities were created:
+              New Content Models PEs
+        - %preformat-model;
+              New Classes PEs
+        - %caption.class; used in:
+            - %fig-model;        - %fig-group-model;
+            - %table-wrap-model; - %chem-struct-wrapper-model;
+            - %graphic-model;
+        - %fig-display.class; used in:
+            -%fig-group-model;
+        - %just-para.class; used in:
+            - <caption>
+            - %table-wrap-foot-model;
+        - %just-table.class; used in: 
+            - %table-wrap-group-model;
+            - %fig-model;
+        - %just-base-display.class; used in:
+            - %array-model;      - %fig-group-model;
+            - %chem-struct-wrapper-model;(where using it added
+              the <preformat> element to <chem-struct-wrapper>
+        - %tbody.class; used in
+            - %array-model;
+        - %chem-struct-elements; used in:
+            - %chem-struct-model;
+
+     d. ACCESS CLASS
+        ### Customization Alert ###
+        - Took <ext-link> out of -%access.class;. It did not belong.
+            It belongs in -%address-link.class;
+        - Added -%address-link.class; to anywhere regular
+            %access.class; was used.
+
+ 14. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+
+ 13. Updated public identifier to "v2.0 20040830"
+
+     =============================================================
+     Version 1.1                       (TRG/BTU) v1.1 (2003-11-01)
+
+ 12. Added "mimetype" and "mime-subtype" attributes to all graphic 
+     and multi-media elements, including: 
+       - <graphic>
+       - <inline-graphic>
+       - <media>
+       - <supplementary-material>
+
+ 11. Created parameter entity %media-atts; to hold attribute list
+     for <media> (and replace %graphic-atts; as attribute list
+     holder)
+     Rationale: Needed to split attribute list for <media> from 
+     that for <graphic>, in order to have different values for 
+     new attribute "mimetype".
+
+ 10. Added attribute "alternate-form-of" to the following elements:
+       - <array>
+       - <chem-struct> (by modifying parameter entity 
+         %chem-structs-atts;)
+       - <graphic> (by modifying parameter entity %graphic-atts;)
+       - <media> (by modifying parameter entity %graphic-atts;)
+       - <supplementary-material> (by modifying parameter entity 
+             %supplementary-material-atts;)
+       - <inline-graphic> (by modifying parameter entity 
+             %inline-graphic-atts;)
+       - <preformat>
+     Rationale: Where multiple formats of an item (e.g., graphic 
+     file, media object, chemical structure) are available, this 
+     attribute indicates that a format is a secondary one and 
+     provides a link to the primary format, so that only one 
+     format of an item is displayed.
+
+  9. Modified parameter entity %array-model; so that the elements
+     <graphic> and <media> could be used multiple times.
+     Rationale: A series of <graphic> (or <media>) elements 
+     may occur in the same content, especially if they are
+     variants of one graphic (or media object) may be linked, 
+     with only one variation being displayed.
+
+  8. Added attribute "id" to the following: 
+       - <inline-graphic> (via parameter entity %inline-graphic-atts;) 
+       - <chem-struct> (via parameter entity %chem-struct-atts;)      
+     Rationale: Provide unique identifier so these elements can be 
+     linked to. Some will have alternate versions which will point
+     to them, others may be the target internal cross-references. 
+
+  7. Created parameter entity %inline-graphic-atts; to hold 
+     various attributes associated with <inline-graphic>
+     Rationale: In order to distinguish between attribute lists
+     used by the Archiving DTD and the Publishing DTD, it was 
+     necessary to create a parameter entity that could be overridden.
+
+  6. Added attribute "content-type" to the following:
+       - <array>  
+       - <boxed-text> by modifying parameter entity %boxed-text-atts;
+       - <fig-group> by modifying parameter entity %fig-group-atts;      
+       - <table-wrap> by modifying parameter entity %table-wrap-atts;
+       - <supplementary-material> by modifying parameter entity 
+             %supplementary-material-atts;
+       - <chem-struct> by modifying parameter entity %chem-struct-atts;
+       - <chem-struct-wrapper> by modifying parameter entity 
+             %chem-struct-wrapper-atts;
+     Rationale: To identify and preserve the semantic intent of 
+     semantically rich source documents.
+
+  5. Added ID attribute to element <array>.
+     Rationale: Provide unique identifier so <array> can be linked to. 
+
+  4. Added parameter entity %label.class; to parameter entity 
+     %chem-struct-model; 
+     Rationale: To allow label as a format override on <chem-struct>. 
+
+  3. Added element <label> to the parameter entity %array-model;
+     Rationale: To allow label as a format override
+     
+  2. Added element <media> to the following parameter entities:
+       - %block-display.class;
+       - %simple-display.class;
+       - %array-model; 
+       - %chem-struct-wrapper-model;
+       - %fig-group-model;                     
+     Rationale: Media object <media> to occur everywhere element 
+     <graphic> is allowed to occur.
+
+  1. Added element <media> for media objects; <media> will be used 
+     in the same way <graphic> is and will have the same content, 
+     but be used for animation or movies.
+     Rationale: To distinguish alternate media (such as movies or 
+     animation) from traditional print graphic forms.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                            Element Classes and Groups
+                        %access.class;
+                        %block-math.class; 
+                        %break.class;
+                        %emphasis.class;
+                        %inside-table-wrapper;
+                        %intable-para.class;
+                        %label.class;
+                        %list.class;
+                        %math.class;
+                        %simple-display.class;
+                        %simple-link.class;
+                        %subsup.class;
+                            Content Models
+                        %sec-opt-title-model;
+                            Attribute Lists
+                        %link-atts;
+                        %might-link-atts;
+                        %other-table-wrap-atts;
+                                                                   -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULT PES FOR ATTRIBUTE LISTS            -->
+<!-- ============================================================= -->
+
+                                                                
+<!--                    DISPLAY ATTRIBUTES OPTIONAL ID             -->
+<!--         position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.               -->
+<!ENTITY % display-atts
+             "position  (anchor | float | margin)        'float'"    >
+
+                                                                
+<!--                    BOXED TEXT ATTRIBUTES                      -->
+<!--                    Attributes for the boxed text <boxed-text>
+                        element                                    -->
+<!ENTITY % boxed-text-atts
+             "id        ID                                #IMPLIED
+              %display-atts;
+              xml:lang  NMTOKEN                           #IMPLIED
+              content-type
+                        CDATA                             #IMPLIED"  >
+ 
+                                                                
+<!--                    CHEMICAL STRUCTURE WRAPPER ATTRIBUTES      -->
+<!--                    Attributes for the <chem-struct-wrapper> 
+                        element, the outer wrapper around one or more
+                        chemical structures                        -->
+<!ENTITY % chem-struct-wrapper-atts
+             "id        ID                                #IMPLIED
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED"  >
+                                                                
+
+<!--                    CHEMICAL STRUCTURE ATTRIBUTES              -->
+<!--                    Attributes for <chem-struct>               -->
+<!ENTITY % chem-struct-atts
+             "%might-link-atts;
+              alternate-form-of
+                         IDREF                            #IMPLIED
+              content-type 
+                        CDATA                             #IMPLIED
+              id        ID                                #IMPLIED"  >
+
+                                                                
+<!--                    FIGURE GROUP ATTRIBUTES                    -->
+<!--                    Attributes for Figure Groups <fig-group>   -->
+<!ENTITY % fig-group-atts
+             "id        ID                                #IMPLIED
+              %display-atts;
+              content-type
+                        CDATA                             #IMPLIED"  >
+
+                                                                
+<!--                    FIGURE ATTRIBUTES                          -->
+<!--                    Attributes for Figures <fig>               -->
+<!ENTITY % fig-atts
+             "id        ID                               #IMPLIED
+              %display-atts;                                       
+              xml:lang  NMTOKEN                          #IMPLIED  
+              fig-type  CDATA                            #IMPLIED"   > 
+
+                                                                
+<!--                    GRAPHIC ATTRIBUTES                         -->
+<!--                    Attributes for Graphic <graphic>           -->
+<!ENTITY % graphic-atts
+             "alternate-form-of
+                        IDREF                            #IMPLIED
+              alt-version
+                        (yes|no)                             'no'
+              id        ID                               #IMPLIED
+              mime-subtype  
+                        (cgm | g3fax | gif | ief |  jpeg | naplps | 
+                         png | prs.btif | prs.pti | t38 | tiff |  
+                         tiff-fx)                         #IMPLIED 
+              mimetype  CDATA                       #FIXED 'image'
+              %display-atts;                                       
+              %link-atts;"                                           >
+
+
+<!--                    MEDIA ATTRIBUTES                           -->
+<!--                    Attributes for Media <media>               -->
+<!ENTITY % media-atts
+             "alternate-form-of
+                        IDREF                            #IMPLIED
+              id        ID                               #IMPLIED
+              mimetype  CDATA                            #IMPLIED
+              mime-subtype
+                        CDATA                            #IMPLIED 
+              %display-atts;                                       
+              %link-atts;"                                           >
+
+                                                                
+<!--                    INLINE GRAPHIC ATTRIBUTES                  -->
+<!--                    Attributes for Inline Graphic 
+                        <inline-graphic>                           -->
+<!ENTITY % inline-graphic-atts
+             "alternate-form-of
+                        IDREF                              #IMPLIED
+              id        ID                                 #IMPLIED
+              mimetype  CDATA                        #FIXED 'image'
+              mime-subtype
+                        CDATA                              #IMPLIED
+              %link-atts;"                                           >
+
+
+<!--                   PREFORMATTED TEXT ATTRIBUTES                -->
+<!--                   Attributes for Preformatted Text <preformat>-->
+<!ENTITY % preformat-atts
+             "alternate-form-of
+                       IDREF                             #IMPLIED
+              id        ID                               #IMPLIED
+              %display-atts;                                     
+              preformat-type
+                        CDATA                            #IMPLIED
+              xml:space (default | preserve)     #FIXED 'preserve'  
+              xml:lang  NMTOKEN                          #IMPLIED"   > 
+
+                                                                
+<!--                    SUPPLEMENTARY INFORMATION ATTRIBUTES       -->
+<!--                    Attributes for Supplementary Information
+                        <supplementary-material>                   -->
+<!ENTITY % supplementary-material-atts
+             "alternate-form-of
+                        IDREF                             #IMPLIED
+              content-type
+                        CDATA                             #IMPLIED
+              id        ID                                #IMPLIED
+              mimetype  CDATA                             #IMPLIED
+              mime-subtype
+                        CDATA                             #IMPLIED 
+              %display-atts;                                       
+              %might-link-atts;                                              
+              xml:lang  NMTOKEN                           #IMPLIED"  > 
+
+
+<!-- ============================================================= -->
+<!--                    TABLE ATTRIBUTE PARAMETER ENTITIES         -->
+<!-- ============================================================= -->
+                          
+
+<!--                    TABLE WRAPPER ATTRIBUTES                   -->
+<!--                    Attributes to be added to the regular NLM
+                        table attributes, for example, when the
+                        Elsevier or OASIS Exchange table models are
+                        used.                                      -->
+<!ENTITY % other-table-wrap-atts
+             ""                                                      > 
+
+                                                                
+<!--                    TABLE GROUP ATTRIBUTES                     -->
+<!--                    Attributes for Table Groups 
+                        <table-wrap-group>                         -->
+<!ENTITY % table-wrap-group-atts
+             "id        ID                                #IMPLIED
+              %other-table-wrap-atts;
+              %display-atts;"                                        >
+
+                                                                
+<!--                    TABLE WRAPPER ATTRIBUTES                   -->
+<!--                    Attributes for Table Wrapper <table-wrap>  -->
+<!ENTITY % table-wrap-atts
+             "id        ID                                #IMPLIED
+              %display-atts;                                       
+              content-type
+                        CDATA                             #IMPLIED 
+              %other-table-wrap-atts;
+              xml:lang  NMTOKEN                           #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR CONTENT MODELS      -->
+<!-- ============================================================= -->
+
+
+<!--                    FIGURE-LIKE CONTENT MODEL                  -->
+<!--                    Content model for the Figure element and any
+                        similarly structured elements              -->
+<!ENTITY % fig-model    "((%id.class;)*, (%label.class;)*, 
+                          (%caption.class;)*, 
+                          (%access.class; | %address-link.class;)*,  
+                          (%block-math.class; | %intable-para.class; |
+                           %just-table.class; | %just-para.class; |
+                           %list.class; | %simple-display.class;)*,
+                          (%display-back-matter.class;)* )"          >
+
+
+<!-- ============================================================= -->
+<!--                    ARRAY ELEMENTS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    ARRAY CONTENT MODEL                        -->
+<!--                    The element used to contain material in
+                        rows and columns that is just a block insert
+                        into the text flow, not numbered or called a
+                        table, and not titled or captioned         -->
+<!ENTITY % array-model  "(label?, 
+                          (%access.class; | %address-link.class;)*,  
+                          ( (%just-base-display.class;)* | 
+                            %tbody.class; ), 
+                          (%display-back-matter.class;)* )"          >
+
+
+<!--                    ARRAY (SIMPLE TABULAR ARRAY)               -->
+<!--                    Used to define in-text table-like (columnar) 
+                        material.  Uses the XHTML table body element
+                        or a graphic to express the rows and columns.
+                        These have neither labels nor captions,
+                        arrays with labels and captions are table
+                        wrappers.
+                        Remarks: Arrays are not allowed to float,
+                        they are tied to their position in the
+                        text.
+                        Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->
+<!ELEMENT  array        %array-model;                                >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an 
+                        item is displayed.
+             id         Unique identifier so the element may be
+                        referenced                                 
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.       
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   
+                        Display Note: An Array element is assumed
+                        to be anchored at its position within the
+                        text.                                      -->                                 
+<!ATTLIST  array
+             alternate-form-of
+                        IDREF                              #IMPLIED
+             id         ID                                 #IMPLIED
+             content-type
+                        CDATA                              #IMPLIED 
+             xml:lang   NMTOKEN                            #IMPLIED  >
+             
+
+<!-- ============================================================= -->
+<!--                    BOXED TEXT ELEMENTS                        -->
+<!-- ============================================================= -->
+
+
+<!--                    BOXED TEXT MODEL                           -->
+<!--                    Complete content model for the boxed text
+                        element, made into a PE so that it could be
+                        redefined, for example, by an authoring DTD.
+                                                                   -->
+<!ENTITY % boxed-text-model
+                        "((%id.class;)*, %sec-opt-title-model;, 
+                          (%display-back-matter.class;)* )"          >
+                                                 
+
+<!--                    BOXED TEXT                                 -->
+<!--                    Textual material that is outside the flow
+                        of the narrative text, for example, a 
+                        sidebar, marginalia, text insert, caution or
+                        note box, etc.                             -->
+<!ELEMENT  boxed-text   %boxed-text-model;                           >
+<!--         id         Unique identifier so the element may be
+                        referenced                                
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   --> 
+<!ATTLIST  boxed-text
+             %boxed-text-atts;                                       > 
+
+
+<!-- ============================================================= -->
+<!--                    CHEMICAL STRUCTURE ELEMENTS                -->
+<!-- ============================================================= -->
+
+
+<!--                    CHEMICAL STRUCTURE WRAPPER MODEL           -->
+<!--                    Content model for the Chemical Structure
+                        Wrapper <chem-struct-wrapper> element      -->
+<!ENTITY % chem-struct-wrapper-model
+                        "((%id.class;)*, (%label.class;)?, 
+                          (%caption.class;)?, 
+                          (%access.class; | %address-link.class;)*,  
+                          (%simple-intable-display.class;)+,
+                          (%display-back-matter.class;)* )"          >
+
+
+<!--                    CHEMICAL STRUCTURE WRAPPER                 -->
+<!--                    A chemical expression, reaction, equation,
+                        etc. that is set apart within the text.
+                        These may be numbered.  They may be modeled
+                        as ASCII characters or as one or more 
+                        graphics.
+                        Implementer's Note: CML will go here, if
+                        added.                                     
+                        Display Note: A chemical structure is assumed
+                        to be anchored at its position within the
+                        text.                                      -->
+<!ELEMENT  chem-struct-wrapper         
+                        %chem-struct-wrapper-model;                  >
+<!--         id         A unique identifier for the chemical structure
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.               -->
+<!ATTLIST  chem-struct-wrapper
+             %chem-struct-wrapper-atts;                              >
+
+
+<!--                    CHEMICAL STRUCTURE ELEMENTS                -->
+<!--                    Those elements that may mix with the data
+                        characters inside a Chemical Structure
+                        <chem-struct>                              -->
+<!ENTITY % chem-struct-elements
+                        "| %access.class; | %address-link.class; | 
+                         %break.class; | 
+                         %emphasis.class; | %label.class; |
+                         %list.class; | %math.class; | 
+                         %simple-display.class; | 
+                         %simple-link.class; | %subsup.class; "      >
+
+
+<!--                    CHEMICAL STRUCTURE MODEL                   -->
+<!--                    A chemical expression, reaction, equation,
+                        etc. that is set apart within the text     
+                        DESIGN NOTE: The list class was added to 
+                        cover the Elsevier DTD <compound-info> 
+                        element.
+                        Authoring Note: This model allows for a
+                        <graphic> element inside of the <chem-struct>
+                        that holds the structure or for using the
+                        linking attributes to point directly to the
+                        URI of such as graphic.
+                        Authoring Note: Accessibility elements should
+                        not be used with this element if they can be
+                        used as part of the <chem-struct-wrapper> 
+                        wrapper element. They are allowed as part of
+                        this element only for those 
+                        <chem-struct-wrapper> elements that 
+                        contain more than one <chem-struct>.       -->
+<!ENTITY % chem-struct-model
+                        "(#PCDATA %chem-struct-elements;)* "         >
+
+
+<!--                    CHEMICAL STRUCTURE (DISPLAY)               -->
+<!--                    A chemical expression, reaction, equation,
+                        etc. that is set apart within the text.
+                        Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->
+<!ELEMENT  chem-struct  %chem-struct-model;                          >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->             
+<!ATTLIST  chem-struct 
+             %chem-struct-atts;                                      >
+
+
+<!-- ============================================================= -->
+<!--                    FIGURE ELEMENTS                            -->
+<!-- ============================================================= -->
+
+
+<!--                    FIGURE GROUP MODEL                         -->
+<!ENTITY % fig-group-model 
+                        "((%label.class;)?, (%caption.class;)?, 
+                          (%access.class; | %address-link.class;)*,  
+                          (%fig-display.class; | 
+                           %just-base-display.class;)* )"            >
+
+
+<!--                    FIGURE GROUP                               -->
+<!--                    Used for a group of figures that must be 
+                        displayed together                         -->
+<!ELEMENT  fig-group    %fig-group-model;                            >
+<!--         id         Unique identifier so the element may be
+                        referenced 
+                        Authoring Note: The value of the "id"
+                        attribute for a Figure Group should begin 
+                        with "FG" (FG1, FG2, FGIII). 
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.               -->
+<!ATTLIST  fig-group
+             %fig-group-atts;                                        >
+
+
+<!--                    FIGURE                                     -->
+<!--                    A block of graphic or textual material that
+                        is identified as a "Figure", usually with
+                        a caption and a label such as "Figure" or
+                        "Figure 3.". 
+                          The content of a Figure need not be 
+                        graphical in nature, for example a list or a
+                        table may be the content of a Figure.
+                        Authoring and Conversion Note: Unlabeled 
+                        graphical objects found in the content 
+                        should be tagged as <graphic>s. A common 
+                        test for Figure versus Graphic is to ask
+                        yourself whether, if you were to create a
+                        "List of Figures" for this article, the
+                        object would or would not appear in such a 
+                        list.                                       -->
+<!ELEMENT  fig          %fig-model;                                   >
+<!--         id         Unique identifier so the element may be
+                        referenced 
+                        Authoring Note: The value of the "id"
+                        attribute for a Figure should begin with "F" 
+                        (F1, F2, FIII). 
+                        Authoring Note: The value of the "id"
+                        attribute for a scheme should begin with "S"
+                        (S1, S2). The value of the "id" attribute 
+                        for a plate should begin with "P" (P1, P2).                      
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.        
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   
+             fig-type   Some DTDs make a distinction between 
+                        different types of graphical objects, some
+                        with attributes, some with elements.  This
+                        attribute is for use in preserving that
+                        intellectual content.  For example, this
+                        attribute could record the fact that the
+                        contents of this figure are: a cartoon,
+                        chart, diagram, drawing, exhibit, 
+                        illustration, map, plate, scheme, workflow, 
+                        etc.                                       -->
+<!ATTLIST  fig
+             %fig-atts;                                              >
+
+
+<!--                    CAPTION BODY PARTS                         -->
+<!--                    Elements that may be included in the body of
+                        the <caption> element                      -->
+<!ENTITY % caption-body-parts  
+                        "(%just-para.class;)*"                       > 
+
+
+<!--                    CAPTION OF A FIGURE, TABLE, ETC.           -->
+<!--                    Wrapper element for the textual description
+                        associated with a figure, table, etc. In
+                        some source document captions, the first 
+                        sentence is set off from the rest as a title.
+                        In some source document, figures may posses
+                        both a title and a caption, in which case 
+                        the title will be moved inside the caption
+                        during conversion.                         -->
+<!ELEMENT  caption      (title?, %caption-body-parts;)               >
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  caption
+             xml:lang   NMTOKEN                            #IMPLIED  > 
+
+                        
+<!--ELEM  title        Defined in %common.ent;                     -->
+<!--ELEM  p            Defined in %common.ent;                     -->
+
+
+<!-- ============================================================= -->
+<!--                    THE GRAPHIC AND MEDIA OBJECT ELEMENTS      -->
+<!-- ============================================================= -->
+
+
+<!--                    GRAPHIC MODEL                              -->
+<!--                    Content model for the <graphic> element    -->
+<!ENTITY % graphic-model   
+                        "(%access.class; | %address-link.class; | 
+                          %id.class; | %label.class; | 
+                          %caption.class; | 
+                          %display-back-matter.class;)* "            > 
+
+
+<!--                    GRAPHIC                                    -->
+<!--                    An external file that holds a picture,
+                        illustration, etc., usually as some form of
+                        binary object. The "content" of the <graphic>
+                        element is not the object, but merely
+                        information about the object. 
+                        Authoring and Conversion Note: Internal
+                        elements such as <caption> should always be
+                        used at the highest possible level, in
+                        other words, if a Graphic is inside a
+                        Figure, the <caption>, <long-desc>, etc.
+                        should be part of the Figure, not part of
+                        the Graphic. Elements such as <caption>
+                        are used when a standalone graphic requires 
+                        them or when multiple graphics within a 
+                        container element such as a Figure need 
+                        them individually. Similarly, the "position"
+                        attribute should not be used on a <graphic>
+                        that is inside a larger display, container
+                        such as a Paragraph.                       -->
+<!ELEMENT  graphic      %graphic-model;                              >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             alt-version
+                        Whether an alternative version of a graphic
+                        has also been provided, for example, a 
+                        thumbnail or a different resolution
+             mimetype   The mimetype of the object. For graphics
+                        the mimetype will always be "image".
+             mime-subtype
+                        The mime-subtype of the object. Taken from
+                        IANA (Internet Assigned Numbers Authority)
+                        allowable values of mime-subtype of mimetype
+                        image (all the non-vendor specific values) 
+                        are: 
+                           cgm
+                           g3fax
+                           gif
+                           ief
+                           jpeg
+                           naplps
+                           png
+                           prs.btif
+                           prs.pti
+                           t38
+                           tiff
+                           tiff-fx                      
+                        
+             id         Unique identifier so the element may be
+                        referenced. The "id" attribute such as 
+                        should be used at the highest level 
+                        possible, therefore a graphic only needs an
+                        "id" when it is standalone. 
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.   
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename            
+                        NOTE: A graphic will always have an 
+                        "xlink:href" attribute that points to the
+                        URI where the graphic may be found.
+                        Authoring and Conversion Note: Best practice
+                        for graphic file names is to limit the names
+                        and path names to the characters: letters,
+                        numbers, underscore, hyphen, and period. All
+                        such names are assumed to be case sensitive.
+                        DOS-style file extensions may be used.     -->
+<!ATTLIST  graphic
+             %graphic-atts;                                          >
+
+
+<!--                    MEDIA OBJECT                               -->
+<!--                    An external file that holds a media object,
+                        such as an animation or a movie. The 
+                        "content" of the <media> element is not the 
+                        object, but merely information about the 
+                        object. 
+                        Authoring and Conversion Note: Internal
+                        elements such as <caption> should always be
+                        used at the highest possible level, in
+                        other words, if a media object is inside a
+                        Figure, the <caption>, <long-desc>, etc.
+                        should be part of the Figure, not part of
+                        the media object. Elements such as <caption>
+                        are used when a standalone media object 
+                        requires them or when multiple media objects 
+                        within a container element such as a Figure 
+                        need them individually. Similarly, the 
+                        "position" attribute should not be used on 
+                        a <media> that is inside a larger display
+                        container such as a Paragraph.             -->
+<!ELEMENT  media        %graphic-model;                              >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             mimetype   The mimetype of the object.
+             mime-subtype
+                        The mime-subtype of the object
+             id         Unique identifier so the element may be
+                        referenced. The "id" attribute such as 
+                        should be used at the highest level 
+                        possible, therefore a graphic only needs an
+                        "id" when it is standalone. 
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.   
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename            
+                        NOTE: A graphic will always have an 
+                        "xlink:href" attribute that points to the
+                        URI where the graphic may be found.
+                        Authoring and Conversion Note: Best practice
+                        for graphic file names is to limit the names
+                        and path names to the characters: letters,
+                        numbers, underscore, hyphen, and period. All
+                        such names are assumed to be case sensitive.
+                        DOS-style file extensions may be used.     -->
+<!ATTLIST  media
+             %media-atts;                                            >
+
+
+<!-- ============================================================= -->
+<!--                    INLINE GRAPHIC                             -->
+<!-- ============================================================= -->
+
+
+<!--                    INLINE GRAPHIC                             -->
+<!--                    A small graphic such as an icon or a small
+                        picture symbol that is displayed or set
+                        in the same line as the text.
+                        Authoring and Conversion Note: Although the
+                        DTD cannot enforce it, this element should
+                        NOT be used for custom-built or private
+                        characters, such as those in the Unicode
+                        private use areas. For such characters,
+                        use the <private-char> element, see
+                        %chars.ent;                                -->
+<!ELEMENT  inline-graphic
+                        (alt-text?)                                  >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so an inline-formula
+                        can be referenced                          
+             mimetype   fixed at "image"
+             mime-subtype
+                        The mime-subtype of the graphic
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename            
+                        NOTE: An inline graphic will always have an 
+                        "xlink:href" attribute that points to the
+                        URI where the graphic may be found.        -->
+<!ATTLIST  inline-graphic
+             %inline-graphic-atts;                                   >
+
+
+<!-- ============================================================= -->
+<!--                    PRESERVE THE WHITESPACE TEXT               -->
+<!-- ============================================================= -->
+
+
+<!--                    PREFORMATTED TEXT ELEMENTS                 -->
+<!--                    Elements that may be used, along with data
+                        characters, inside the content model for the
+                        <preformat> element, in which white space,
+                        such as tabs, line feeds, and spaces will
+                        be preserved                               -->
+<!ENTITY % preformat-elements
+                        "| %access.class; | %address-link.class; |
+                         %emphasis.class; |
+                         %display-back-matter.class; | %id.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    PREFORMAT MODEL                            -->
+<!--                    Content model for the <preformat> element  -->
+<!ENTITY % preformat-model   
+                        "(#PCDATA %preformat-elements;)*"            > 
+
+
+<!--                    PREFORMATTED TEXT                          -->
+<!--                    Used for preformatted text such as 
+                        computer code in which whitespace, such as
+                        tabs, line feeds, and spaces, should be
+                        preserved. Typically displayed or printed
+                        in a monofont to preserve character 
+                        alignment.
+                        Related Elements: Poetry may be tagged with
+                        <preformat> if spacing is critical, but 
+                        usually poetry should be tagged with the
+                        <verse-group> element, which may not preserve
+                        the exact indentation but is likely to be
+                        displayed in a proportional font.          -->
+<!ELEMENT  preformat    %preformat-model;                            >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so the element may be
+                        referenced. 
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.
+             preformat-type
+                        What kind of content, for example:
+                          code   Computer code
+                          poetry Poems
+                          ascii  ASCII art
+                        This attribute is added to preserve the
+                        intellectual content of DTDs that provide
+                        this information.  Many documents will not
+                        be able to provide this data.
+             xml:space  Request that, when printing or displaying
+                        this element, all white space such as tabs
+                        and spaces and line breaks be preserved.  
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  preformat
+             %preformat-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    SUPPLEMENTARY MATERIAL                     -->
+<!-- ============================================================= -->
+
+
+<!--                    SUPPLEMENTARY MATERIAL MODEL               -->
+<!--                    Content model for the 
+                        <supplementary-material> element           -->
+<!ENTITY % supplementary-material-model 
+                        "%fig-model;"                                > 
+
+
+<!--                    SUPPLEMENTARY MATERIAL                     -->
+<!--                    Additional data files that contain
+                        information directly supportive of the item,
+                        for example, an audio clip, movie, database,
+                        spreadsheet, applet, or other external file.  
+                        Remarks: This is similar to the audio-visual
+                        element in some DTDs and the unprinted-item
+                        element (meaning that it is used only for
+                        electronic files) in other DTDs.
+                        Remarks: This element is used in two senses: 
+                        inside the article front matter as an alert
+                        to the existence of supplementary material
+                        and as part of the textual flow, where it is
+                        similar to a Figure, in that it can be 
+                        positioned as a floating or anchored object 
+                        and may take a caption.
+                          In addition, the supplementary material
+                        may identify its file type with the
+                        "mimetype" attribute.
+                        Authoring Note: Supplementary material may
+                        contain a preview image (e.g., the first
+                        frame of a movie, tagged as a <graphic> or 
+                        <media>), with the caption/preview placed 
+                        in a manner similar to a Figure and a 
+                        cross-reference made to the material from 
+                        the text.        
+                        Related Elements: See related element
+                        <inline-supplementary-material> for 
+                        a simpler form that can be used to mark up
+                        text references to supplementary material
+                        where the reference appears in the regular
+                        flow of the text and does not have a preview
+                        image or separate caption.                 -->
+<!ELEMENT  supplementary-material     
+                        %supplementary-material-model;               >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             id         Unique identifier so the element may be
+                        referenced                              
+             mimetype   The mimetype of the object.
+             mime-subtype
+                        The mime-subtype of the object
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  supplementary-material
+             %supplementary-material-atts;                           >
+
+
+<!-- ============================================================= -->
+<!--                    TABLE ELEMENTS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    TABLE WRAPPER GROUP MODEL                  -->
+<!--                    Content model for the <table-wrap-group> 
+                        element                                    -->
+<!ENTITY % table-wrap-group-model 
+                        "(label?, caption?, 
+                          (%access.class; | %address-link.class;)*,  
+                          (%just-table.class;)+ )"                   > 
+
+
+<!--                    TABLE WRAPPER GROUP                        -->
+<!--                    Used as a wrapper tag to contain a group of
+                        tables that must be displayed together     -->
+<!ELEMENT  table-wrap-group       
+                        %table-wrap-group-model;                     >
+<!--         id         Unique identifier so the element may be
+                        referenced 
+                        Authoring Note: id of table group should 
+                        begin with "TG" (TG1, TGIV, TG43) 
+             position   Must this display object (figure, boxed text,
+                        etc.) be anchored in its exact location
+                        within the text or may it float, for example
+                        to the top of the next page, next column, or
+                        within a separate window?  Values are:
+                          anchor      Object must remain in place
+                          float       Object is not anchored and
+                                      may be moved to a new column,
+                                      a new window, etc.
+                          margin      In print, item should be placed
+                                      in the margin or gutter. 
+                                      Online the item should 
+                                      remain closely associated 
+                                      with the text.               -->
+<!ATTLIST  table-wrap-group
+             %table-wrap-group-atts;                                 >
+
+
+<!--                    TABLE WRAPPER CONTENT MODEL                -->
+<!--                    Content model for the container element that
+                        surrounds the standard table models for row
+                        and columns.                               -->
+<!ENTITY % table-wrap-model    
+                        "((%id.class;)*, (%label.class;)?,
+                          (%caption.class;)?, 
+                          (%access.class; | %address-link.class;)*,  
+                          (%inside-table-wrapper;)*, 
+                          (%table-foot.class; |
+                           %display-back-matter.class;)* )"          >
+
+
+<!--                    TABLE WRAPPER                              -->
+<!--                    Used to hold a complete table, that is, not
+                        only the rows and columns that make up a
+                        table, but also the table captions, list
+                        of table footnotes, alternative descriptions
+                        for accessibility, etc.  Within the Table
+                        Wrapper element, the row and column tags that
+                        describe the table cells are defined by one
+                        of the popular "standard" table models, for
+                        example the XHTML table model, OASIS Exchange 
+                        (CALS) table model, of the Elsevier Science 
+                        Full Length Article table body <tblbody> 
+                        model, et al.)
+                        Remarks: This model has been designed to allow
+                        for a "table" that is just a graphic or a list 
+                        rather than the explicit rows and columns of a
+                        table element such as XHTML <table>.       
+                        Authoring and Conversion Note: Many journal
+                        DTDs use an element Called Table Footnote,
+                        with a tag such as <tblfn> for the footnotes
+                        inside a table.  This DTD uses <fn> inside 
+                        tables as well as everywhere. They are
+                        differentiated by context. Footnotes inside
+                        a Table Wrapper are assumed to be footnotes
+                        to the table and part of the table, 
+                        printed at the bottom of it, etc.          -->
+<!ELEMENT  table-wrap   %table-wrap-model;                           >
+<!--         id         Unique identifier so the element may be
+                        referenced 
+                        Authoring Note: The value of the "id"
+                        attribute of table should begin with 
+                        "T" (T1, TIV, T43)   
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                     
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  table-wrap
+             %table-wrap-atts;                                       >
+
+
+<!--                    TABLE WRAP FOOTER MODEL                    -->
+<!--                    Content model for the <table-wrap-foot> 
+                        element                                    -->
+<!ENTITY % table-wrap-foot-model   
+                        "(title?, 
+                          (%just-para.class; |  %fn-link.class; | 
+                           %display-back-matter.class;)+ )"          > 
+
+
+<!--                    TABLE WRAP FOOTER                          -->
+<!--                    Wrapper element to hold a group of footnotes 
+                        or other notes or general paragraphs at the
+                        end of a table.  Not the same as the
+                        Table Foot <tfoot>, which contains rows
+                        and columns like the rest of the table.    -->
+<!ELEMENT  table-wrap-foot      
+                        %table-wrap-foot-model;                      >
+
+
+<!-- ================== End Display Class Module ================= -->
\ No newline at end of file
diff --git a/dtd/eInfo_020511.dtd b/dtd/eInfo_020511.dtd
new file mode 100644
index 0000000..ac4a59f
--- /dev/null
+++ b/dtd/eInfo_020511.dtd
@@ -0,0 +1,60 @@
+<!--    
+                This is the Current DTD for Entrez eInfo
+$Id: eInfo_020511.dtd 393292 2013-03-22 21:30:47Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT	DbName		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	Name		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	FullName	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Description	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	DbBuild		(#PCDATA)>      <!-- .+ -->
+<!ELEMENT	TermCount	(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	Menu		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	DbTo		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	MenuName	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Count		(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	LastUpdate	(#PCDATA)>	<!-- \d+ -->
+
+<!ELEMENT	ERROR		(#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT	IsDate		(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	IsNumerical	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	SingleToken	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	Hierarchy	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	IsHidden	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT       IsRangable      (#PCDATA)>      <!-- (Y|N) -->
+<!ELEMENT       IsTruncatable   (#PCDATA)>      <!-- (Y|N) -->
+
+
+<!ELEMENT	DbList		(DbName+)>
+
+<!ELEMENT	Field		(Name,
+                FullName,
+				Description,
+				TermCount,
+				IsDate,
+				IsNumerical,
+				SingleToken,
+				Hierarchy,
+                                IsHidden,
+                                IsRangable?,
+                IsTruncatable?)>
+
+<!ELEMENT	Link		(Name,Menu,Description,DbTo)>
+
+
+<!ELEMENT	LinkList	(Link*)>
+<!ELEMENT	FieldList	(Field*)>
+
+
+<!ELEMENT	DbInfo		(DbName,
+				MenuName,
+				Description,
+				DbBuild?,
+				Count,
+				LastUpdate,
+				FieldList,
+				LinkList?)>
+				
+<!ELEMENT	eInfoResult	(DbList|DbInfo|ERROR)>
diff --git a/dtd/eLink_090910.dtd b/dtd/eLink_090910.dtd
new file mode 100644
index 0000000..6aa4c47
--- /dev/null
+++ b/dtd/eLink_090910.dtd
@@ -0,0 +1,79 @@
+<!--    
+                This is the Current DTD for Entrez eLink
+$Id: eLink_090910.dtd 170412 2009-09-11 21:29:34Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT       ERROR           (#PCDATA)>	<!-- .+ -->
+<!ELEMENT       Info                   (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT	Id	           (#PCDATA)>	<!-- \d+ -->
+<!ATTLIST	Id		
+			HasLinkOut  (Y|N)	#IMPLIED	
+			HasNeighbor (Y|N)	#IMPLIED
+			>
+<!ELEMENT	Score		(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	DbFrom	(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	DbTo		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	LinkName	(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	WebEnv	(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT       MenuTag             (#PCDATA)>      <!-- \S+ -->
+<!ELEMENT       HtmlTag              (#PCDATA)>      <!-- \S+ -->
+<!ELEMENT       Priority                 (#PCDATA)>      <!-- \S+ -->
+
+
+<!ELEMENT	IdList		(Id*)>
+
+<!-- cmd=neighbor -->
+<!ELEMENT	Link		(Id, Score?)>
+<!ELEMENT	QueryKey	(#PCDATA)>
+
+<!ELEMENT	LinkSetDb	               (DbTo, LinkName, (Link*|Info), ERROR?)>
+<!ELEMENT	LinkSetDbHistory	(DbTo, LinkName, (QueryKey|Info), ERROR?)>
+
+<!-- cmd=llinks -->
+
+<!ELEMENT	Url		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	IconUrl		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT       SubjectType	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT       Category	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT       Attribute               (#PCDATA)>	<!-- .+ -->
+<!ELEMENT       Name		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT       NameAbbr	(#PCDATA)>	<!-- \S+ -->
+
+<!ELEMENT	Provider (
+				Name,
+				NameAbbr,
+				Id,
+				Url,
+				IconUrl?
+			)>
+
+
+<!ELEMENT	ObjUrl	(
+				Url,
+				IconUrl?,
+				LinkName?,
+                                SubjectType*,
+                                Category*,
+                                Attribute*,
+                               Provider			
+			)>
+
+<!ELEMENT	IdUrlSet	(Id,(ObjUrl+|Info))>
+
+<!ELEMENT	IdUrlList	(IdUrlSet*,ERROR?)>
+
+<!ELEMENT       LinkInfo        (DbTo, LinkName, MenuTag?, HtmlTag?, Url?, Priority)>
+<!ELEMENT       IdLinkSet       (Id, LinkInfo*)>
+
+<!-- cmd=ncheck & lcheck & acheck -->
+<!ELEMENT	IdCheckList	((Id|IdLinkSet)*,ERROR?)>
+
+
+<!-- Common -->
+<!ELEMENT	LinkSet		(DbFrom, 
+				((IdList?, (LinkSetDb*  |  (LinkSetDbHistory*, WebEnv))) | IdUrlList | IdCheckList | ERROR)  
+				)>
+
+<!ELEMENT	eLinkResult	(LinkSet*, ERROR?)>
diff --git a/dtd/eLink_101123.dtd b/dtd/eLink_101123.dtd
new file mode 100644
index 0000000..934b5a9
--- /dev/null
+++ b/dtd/eLink_101123.dtd
@@ -0,0 +1,88 @@
+<!--    
+                This is the Current DTD for Entrez eLink
+$Id: eLink_101123.dtd 349314 2012-01-09 23:26:00Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT	ERROR			(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Info			(#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT	Id				(#PCDATA)>	<!-- \d+ -->
+<!ATTLIST	Id		
+			HasLinkOut  (Y|N)	#IMPLIED	
+			HasNeighbor (Y|N)	#IMPLIED
+			>
+
+<!ELEMENT	Score			(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	DbFrom			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	DbTo			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	LinkName		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	WebEnv			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	MenuTag			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	HtmlTag			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	Priority		(#PCDATA)>	<!-- \S+ -->
+
+<!ELEMENT	IdList		(Id*)>
+
+<!-- cmd=neighbor -->
+<!ELEMENT	Link		(Id, Score?)>
+<!ELEMENT	QueryKey		(#PCDATA)>
+
+<!ELEMENT	LinkSetDb	(DbTo, LinkName, (Link*|Info), ERROR?)>
+<!ELEMENT	LinkSetDbHistory	(DbTo, LinkName, (QueryKey|Info), ERROR?)>
+
+<!-- cmd=llinks -->
+
+<!ELEMENT	Url			    (#PCDATA)>	<!-- \S+ -->
+<!ATTLIST	Url			LNG     (DA|DE|EN|EL|ES|FR|IT|IW|JA|NL|NO|RU|SV|ZH)     "EN">
+
+<!ELEMENT	IconUrl			(#PCDATA)>	<!-- \S+ -->
+<!ATTLIST	IconUrl		LNG     (DA|DE|EN|EL|ES|FR|IT|IW|JA|NL|NO|RU|SV|ZH)     "EN">
+
+<!ELEMENT	SubjectType		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Category		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Attribute		(#PCDATA)>	<!-- .+ -->
+<!--ELEMENT	LinkName		(#PCDATA)-->	<!--defined in neighbor section--><!-- \S+ -->
+<!ELEMENT	Name			(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	NameAbbr		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	SubProvider		(#PCDATA)>
+
+<!ELEMENT   FirstChar		(#PCDATA)>
+
+<!ELEMENT	Provider (
+				Name,
+				NameAbbr,
+				Id,
+				Url,
+				IconUrl?
+			)>
+
+<!ELEMENT	ObjUrl	(
+				Url,
+				IconUrl?,
+				LinkName?,
+                SubjectType*,
+				Category*,
+                Attribute*,
+                Provider,
+                SubProvider?
+			)>
+
+<!ELEMENT	IdUrlSet	(Id,(ObjUrl+|Info))>
+
+<!ELEMENT   FirstChars  (FirstChar*)>
+
+<!ELEMENT	LinkInfo	(DbTo, LinkName, MenuTag?, HtmlTag?, Url?, Priority)>
+<!ELEMENT	IdLinkSet	(Id, LinkInfo*)>
+<!ELEMENT	IdUrlList	(IdUrlSet* | FirstChars*)>
+
+<!-- cmd=ncheck & lcheck & acheck -->
+<!ELEMENT	IdCheckList	((Id|IdLinkSet)*,ERROR?)>
+
+
+<!-- Common -->
+<!ELEMENT	LinkSet		(DbFrom, 
+				((IdList?, ((ERROR?, LinkSetDb)*  |  (LinkSetDbHistory*, WebEnv))) | IdUrlList | IdCheckList | ERROR), ERROR?  
+				)>
+
+<!ELEMENT	eLinkResult	(LinkSet*, ERROR?)>
diff --git a/dtd/ePost_020511.dtd b/dtd/ePost_020511.dtd
new file mode 100644
index 0000000..3da7498
--- /dev/null
+++ b/dtd/ePost_020511.dtd
@@ -0,0 +1,14 @@
+<!--    
+                This is the Current DTD for Entrez ePost
+$Id: ePost_020511.dtd 161288 2009-05-26 18:34:21Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT	Id		(#PCDATA)>	<!-- \d+ -->
+
+<!ELEMENT	InvalidIdList	(Id+)>
+<!ELEMENT       QueryKey        (#PCDATA)>	<!-- \d+ -->
+<!ELEMENT       WebEnv          (#PCDATA)>	<!-- \S+ -->
+<!ELEMENT       ERROR           (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT     ePostResult       (InvalidIdList?,(QueryKey,WebEnv)?,ERROR?)>
diff --git a/dtd/eSearch_020511.dtd b/dtd/eSearch_020511.dtd
new file mode 100644
index 0000000..15e734b
--- /dev/null
+++ b/dtd/eSearch_020511.dtd
@@ -0,0 +1,64 @@
+<!--    
+                This is the Current DTD for Entrez eSearch
+$Id: eSearch_020511.dtd 85163 2006-06-28 17:35:21Z olegh $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT       Count           (#PCDATA)>	<!-- \d+ -->
+<!ELEMENT       RetMax          (#PCDATA)>	<!-- \d+ -->
+<!ELEMENT       RetStart        (#PCDATA)>	<!-- \d+ -->
+<!ELEMENT       Id              (#PCDATA)>	<!-- \d+ -->
+
+<!ELEMENT       From            (#PCDATA)>	<!-- .+ -->
+<!ELEMENT       To              (#PCDATA)>	<!-- .+ -->
+<!ELEMENT       Term            (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT       Field           (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT        QueryKey       (#PCDATA)>	<!-- \d+ -->
+<!ELEMENT        WebEnv         (#PCDATA)>	<!-- \S+ -->
+ 
+<!ELEMENT       Explode         (#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT       OP              (#PCDATA)>	<!-- (AND|OR|NOT|RANGE|GROUP) -->
+<!ELEMENT       IdList          (Id*)>
+
+<!ELEMENT       Translation     (From, To)>
+<!ELEMENT       TranslationSet  (Translation*)>
+
+<!ELEMENT       TermSet (Term, Field, Count, Explode)>
+<!ELEMENT       TranslationStack        ((TermSet|OP)*)>
+
+<!-- Error message tags  -->
+
+<!ELEMENT        ERROR                  (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT        OutputMessage		    (#PCDATA)>	<!-- .+ -->
+<!ELEMENT        QuotedPhraseNotFound   (#PCDATA)>	<!-- .+ -->
+<!ELEMENT        PhraseIgnored          (#PCDATA)>	<!-- .+ -->
+<!ELEMENT        FieldNotFound          (#PCDATA)>	<!-- .+ -->
+<!ELEMENT        PhraseNotFound         (#PCDATA)>	<!-- .+ -->
+<!ELEMENT        QueryTranslation       (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT        ErrorList      (PhraseNotFound*,FieldNotFound*)>
+<!ELEMENT        WarningList   	(PhraseIgnored*,
+				QuotedPhraseNotFound*,
+				OutputMessage*)>
+<!-- Response tags -->
+
+
+<!ELEMENT       eSearchResult   (((
+                                Count,
+                                    (RetMax,
+                                    RetStart,
+                                    QueryKey?,
+                                    WebEnv?,
+                                    IdList,
+                                    TranslationSet,
+                                    TranslationStack?,
+                                    QueryTranslation
+                                    )?
+                                ) | ERROR),
+				ErrorList?,
+				WarningList?
+				)>
+
diff --git a/dtd/eSpell.dtd b/dtd/eSpell.dtd
new file mode 100644
index 0000000..18b6265
--- /dev/null
+++ b/dtd/eSpell.dtd
@@ -0,0 +1,20 @@
+<!--    
+This is the Current DTD for Entrez eSpell
+$Id:
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT Original                     (#PCDATA)>           <!-- \d+ -->
+<!ELEMENT Replaced                     (#PCDATA)>           <!-- \d+ -->
+
+<!ELEMENT Database                     (#PCDATA)>           <!-- \d+ -->
+<!ELEMENT Query                        (#PCDATA)>           <!-- \d+ -->
+<!ELEMENT CorrectedQuery               (#PCDATA)>           <!-- \d+ -->
+<!ELEMENT SpelledQuery                 (Replaced|Original)*> <!-- \d+ -->
+<!ELEMENT ERROR                        (#PCDATA)>           <!-- \d+ -->
+
+<!ELEMENT eSpellResult    (Database, Query, CorrectedQuery, SpelledQuery, ERROR)>
+
+
+
+
diff --git a/dtd/eSummary_041029.dtd b/dtd/eSummary_041029.dtd
new file mode 100644
index 0000000..a10572a
--- /dev/null
+++ b/dtd/eSummary_041029.dtd
@@ -0,0 +1,20 @@
+<!--    
+This is the Current DTD for Entrez eSummary version 2
+$Id: eSummary_041029.dtd 49514 2004-10-29 15:52:04Z parantha $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT Id                (#PCDATA)>          <!-- \d+ -->
+
+<!ELEMENT Item              (#PCDATA|Item)*>   <!-- .+ -->
+
+<!ATTLIST Item
+    Name CDATA #REQUIRED
+    Type (Integer|Date|String|Structure|List|Flags|Qualifier|Enumerator|Unknown) #REQUIRED
+>
+
+<!ELEMENT ERROR             (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT DocSum            (Id, Item+)>
+
+<!ELEMENT eSummaryResult    (DocSum|ERROR)+>
diff --git a/dtd/egquery.dtd b/dtd/egquery.dtd
new file mode 100644
index 0000000..ff53342
--- /dev/null
+++ b/dtd/egquery.dtd
@@ -0,0 +1,22 @@
+<!--
+        This is the Current DTD for Entrez eGSearch
+        $Id: egquery.dtd 39250 2004-05-03 16:19:48Z yasmax $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT       DbName          (#PCDATA)>      <!-- .+ -->
+<!ELEMENT       MenuName        (#PCDATA)>      <!-- .+ -->
+<!ELEMENT       Count           (#PCDATA)>      <!-- \d+ -->
+<!ELEMENT       Status          (#PCDATA)>      <!-- .+ -->
+<!ELEMENT       Term            (#PCDATA)>      <!-- .+ -->
+
+<!ELEMENT       ResultItem      (
+                                     DbName,
+                                     MenuName,
+                                     Count,
+                                     Status
+                                )>
+<!ELEMENT       eGQueryResult  (ResultItem+)>
+
+<!ELEMENT       Result         (Term, eGQueryResult)>
+
diff --git a/dtd/einfo.dtd b/dtd/einfo.dtd
new file mode 100644
index 0000000..f42e108
--- /dev/null
+++ b/dtd/einfo.dtd
@@ -0,0 +1,62 @@
+<!--    
+                This is the Current DTD for Entrez eInfo
+$Id: eInfo_020511.dtd 393292 2013-03-22 21:30:47Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT	DbName		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	Name		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	FullName	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Description	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	DbBuild		(#PCDATA)>      <!-- .+ -->
+<!ELEMENT	TermCount	(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	Menu		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	DbTo		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	MenuName	(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Count		(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	LastUpdate	(#PCDATA)>	<!-- \d+ -->
+
+<!ELEMENT	ERROR		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Warning		(#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT	IsDate		(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	IsNumerical	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	SingleToken	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	Hierarchy	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT	IsHidden	(#PCDATA)>	<!-- (Y|N) -->
+<!ELEMENT       IsRangable      (#PCDATA)>      <!-- (Y|N) -->
+<!ELEMENT       IsTruncatable   (#PCDATA)>      <!-- (Y|N) -->
+
+
+<!ELEMENT	DbList		(DbName+)>
+
+<!ELEMENT	Field		(Name,
+                FullName,
+				Description,
+				TermCount,
+				IsDate,
+				IsNumerical,
+				SingleToken,
+				Hierarchy,
+                                IsHidden,
+                                IsRangable?,
+                IsTruncatable?)>
+
+<!ELEMENT	Link		(Name,Menu,Description,DbTo)>
+
+
+<!ELEMENT	LinkList	(Link*)>
+<!ELEMENT	FieldList	(Field*)>
+
+
+<!ELEMENT	DbInfo		(DbName,
+				MenuName,
+				Description,
+				DbBuild?,
+				Warning?,
+				Count?,
+				LastUpdate?,
+				FieldList?,
+				LinkList?)>
+				
+<!ELEMENT	eInfoResult	(DbList|DbInfo|ERROR)>
diff --git a/dtd/elink.dtd b/dtd/elink.dtd
new file mode 100644
index 0000000..934b5a9
--- /dev/null
+++ b/dtd/elink.dtd
@@ -0,0 +1,88 @@
+<!--    
+                This is the Current DTD for Entrez eLink
+$Id: eLink_101123.dtd 349314 2012-01-09 23:26:00Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT	ERROR			(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Info			(#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT	Id				(#PCDATA)>	<!-- \d+ -->
+<!ATTLIST	Id		
+			HasLinkOut  (Y|N)	#IMPLIED	
+			HasNeighbor (Y|N)	#IMPLIED
+			>
+
+<!ELEMENT	Score			(#PCDATA)>	<!-- \d+ -->
+<!ELEMENT	DbFrom			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	DbTo			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	LinkName		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	WebEnv			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	MenuTag			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	HtmlTag			(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	Priority		(#PCDATA)>	<!-- \S+ -->
+
+<!ELEMENT	IdList		(Id*)>
+
+<!-- cmd=neighbor -->
+<!ELEMENT	Link		(Id, Score?)>
+<!ELEMENT	QueryKey		(#PCDATA)>
+
+<!ELEMENT	LinkSetDb	(DbTo, LinkName, (Link*|Info), ERROR?)>
+<!ELEMENT	LinkSetDbHistory	(DbTo, LinkName, (QueryKey|Info), ERROR?)>
+
+<!-- cmd=llinks -->
+
+<!ELEMENT	Url			    (#PCDATA)>	<!-- \S+ -->
+<!ATTLIST	Url			LNG     (DA|DE|EN|EL|ES|FR|IT|IW|JA|NL|NO|RU|SV|ZH)     "EN">
+
+<!ELEMENT	IconUrl			(#PCDATA)>	<!-- \S+ -->
+<!ATTLIST	IconUrl		LNG     (DA|DE|EN|EL|ES|FR|IT|IW|JA|NL|NO|RU|SV|ZH)     "EN">
+
+<!ELEMENT	SubjectType		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Category		(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	Attribute		(#PCDATA)>	<!-- .+ -->
+<!--ELEMENT	LinkName		(#PCDATA)-->	<!--defined in neighbor section--><!-- \S+ -->
+<!ELEMENT	Name			(#PCDATA)>	<!-- .+ -->
+<!ELEMENT	NameAbbr		(#PCDATA)>	<!-- \S+ -->
+<!ELEMENT	SubProvider		(#PCDATA)>
+
+<!ELEMENT   FirstChar		(#PCDATA)>
+
+<!ELEMENT	Provider (
+				Name,
+				NameAbbr,
+				Id,
+				Url,
+				IconUrl?
+			)>
+
+<!ELEMENT	ObjUrl	(
+				Url,
+				IconUrl?,
+				LinkName?,
+                SubjectType*,
+				Category*,
+                Attribute*,
+                Provider,
+                SubProvider?
+			)>
+
+<!ELEMENT	IdUrlSet	(Id,(ObjUrl+|Info))>
+
+<!ELEMENT   FirstChars  (FirstChar*)>
+
+<!ELEMENT	LinkInfo	(DbTo, LinkName, MenuTag?, HtmlTag?, Url?, Priority)>
+<!ELEMENT	IdLinkSet	(Id, LinkInfo*)>
+<!ELEMENT	IdUrlList	(IdUrlSet* | FirstChars*)>
+
+<!-- cmd=ncheck & lcheck & acheck -->
+<!ELEMENT	IdCheckList	((Id|IdLinkSet)*,ERROR?)>
+
+
+<!-- Common -->
+<!ELEMENT	LinkSet		(DbFrom, 
+				((IdList?, ((ERROR?, LinkSetDb)*  |  (LinkSetDbHistory*, WebEnv))) | IdUrlList | IdCheckList | ERROR), ERROR?  
+				)>
+
+<!ELEMENT	eLinkResult	(LinkSet*, ERROR?)>
diff --git a/dtd/elink_020122.dtd b/dtd/elink_020122.dtd
new file mode 100644
index 0000000..6f93374
--- /dev/null
+++ b/dtd/elink_020122.dtd
@@ -0,0 +1,20 @@
+<!--    
+                This is the Current DTD for elink program
+
+
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT id        (#PCDATA)>
+<!ELEMENT Score     (#PCDATA)>
+<!ELEMENT DbTo      (#PCDATA)>
+<!ELEMENT DbFrom    (#PCDATA)>
+<!ELEMENT LinkName  (#PCDATA)>
+
+<!ELEMENT Link      (id, Score?)>
+
+<!ELEMENT LinkSetDb (DbTo, LinkName, Link*)>
+
+<!ELEMENT LinkSet (id+, LinkSetDb*)>
+
+<!ELEMENT ElinkResult (DbFrom, LinkSet*)>
diff --git a/dtd/epost.dtd b/dtd/epost.dtd
new file mode 100644
index 0000000..3da7498
--- /dev/null
+++ b/dtd/epost.dtd
@@ -0,0 +1,14 @@
+<!--    
+                This is the Current DTD for Entrez ePost
+$Id: ePost_020511.dtd 161288 2009-05-26 18:34:21Z fialkov $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT	Id		(#PCDATA)>	<!-- \d+ -->
+
+<!ELEMENT	InvalidIdList	(Id+)>
+<!ELEMENT       QueryKey        (#PCDATA)>	<!-- \d+ -->
+<!ELEMENT       WebEnv          (#PCDATA)>	<!-- \S+ -->
+<!ELEMENT       ERROR           (#PCDATA)>	<!-- .+ -->
+
+<!ELEMENT     ePostResult       (InvalidIdList?,(QueryKey,WebEnv)?,ERROR?)>
diff --git a/dtd/esearch.dtd b/dtd/esearch.dtd
new file mode 100644
index 0000000..bd11e35
--- /dev/null
+++ b/dtd/esearch.dtd
@@ -0,0 +1,103 @@
+<!--
+                This is the Current DTD for Entrez eSearch
+$Id: eSearch_020511.dtd 85163 2006-06-28 17:35:21Z olegh $
+-->
+<!-- ================================================================= -->
+
+<!--~~ !dtd
+~~json 
+    <json type='esearch' version='0.3'>
+      <config lcnames='true'/>
+    </json>
+~~-->
+
+<!ELEMENT       eSearchResult  (
+                                 (
+                                   (
+                                     Count,
+                                     ( RetMax,
+                                       RetStart,
+                                       QueryKey?,
+                                       WebEnv?,
+                                       IdList,
+                                       TranslationSet,
+                                       TranslationStack?,
+                                       QueryTranslation
+                                      )?
+                                   ) | ERROR
+                                 ),
+                                 ErrorList?,
+                                 WarningList?
+                               )>
+
+
+<!ELEMENT       Count             (#PCDATA)>  <!-- \d+ -->
+<!ELEMENT       RetMax            (#PCDATA)>  <!-- \d+ -->
+<!ELEMENT       RetStart          (#PCDATA)>  <!-- \d+ -->
+<!ELEMENT       Id                (#PCDATA)>  <!-- \d+ -->
+
+<!ELEMENT       From              (#PCDATA)>  <!-- .+ -->
+<!ELEMENT       To                (#PCDATA)>  <!-- .+ -->
+<!ELEMENT       Term              (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT       Field             (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT       QueryKey          (#PCDATA)>  <!-- \d+ -->
+<!ELEMENT       WebEnv            (#PCDATA)>  <!-- \S+ -->
+
+<!ELEMENT       Explode           (#PCDATA)>  <!-- (Y|N) -->
+<!ELEMENT       OP                (#PCDATA)>  <!-- (AND|OR|NOT|RANGE|GROUP) -->
+<!ELEMENT       IdList            (Id*)>
+
+<!ELEMENT       Translation       (From, To)>
+<!ELEMENT       TranslationSet    (Translation*)>
+
+<!ELEMENT       TermSet           (Term, Field, Count, Explode)>
+
+<!--~~ <TranslationStack>
+~~ json <array/>
+~~-->
+<!ELEMENT       TranslationStack  ((TermSet|OP)*)>
+
+<!-- Error message tags  -->
+<!--~~ <ERROR>
+~~ json <json key="ERROR"/>
+~~-->
+<!ELEMENT        ERROR                  (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT        OutputMessage          (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT        QuotedPhraseNotFound   (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT        PhraseIgnored          (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT        FieldNotFound          (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT        PhraseNotFound         (#PCDATA)>  <!-- .+ -->
+
+
+<!ELEMENT        QueryTranslation       (#PCDATA)>  <!-- .+ -->
+
+<!--~~ <ErrorList>
+~~ json
+  <object>
+    <array key="phrasesnotfound" select='PhraseNotFound'/>
+    <array key="fieldsnotfound" select='FieldsNotFound'/>
+  </object>
+~~-->
+<!ELEMENT        ErrorList      (PhraseNotFound*,FieldNotFound*)>
+
+<!--~~ <WarningList>
+~~ json
+  <object>
+    <array key="phrasesignored" select='PhraseIgnored'/>
+    <array key="quotedphrasesnotfound" select='QuotedPhraseNotFound'/>
+    <array key="outputmessages" select='OutputMessage'/>
+  </object>
+~~-->
+<!ELEMENT        WarningList    ( PhraseIgnored*,
+                                  QuotedPhraseNotFound*,
+                                  OutputMessage* )>
+
+
+
diff --git a/dtd/esummary-v1.dtd b/dtd/esummary-v1.dtd
new file mode 100644
index 0000000..a10572a
--- /dev/null
+++ b/dtd/esummary-v1.dtd
@@ -0,0 +1,20 @@
+<!--    
+This is the Current DTD for Entrez eSummary version 2
+$Id: eSummary_041029.dtd 49514 2004-10-29 15:52:04Z parantha $
+-->
+<!-- ================================================================= -->
+
+<!ELEMENT Id                (#PCDATA)>          <!-- \d+ -->
+
+<!ELEMENT Item              (#PCDATA|Item)*>   <!-- .+ -->
+
+<!ATTLIST Item
+    Name CDATA #REQUIRED
+    Type (Integer|Date|String|Structure|List|Flags|Qualifier|Enumerator|Unknown) #REQUIRED
+>
+
+<!ELEMENT ERROR             (#PCDATA)>  <!-- .+ -->
+
+<!ELEMENT DocSum            (Id, Item+)>
+
+<!ELEMENT eSummaryResult    (DocSum|ERROR)+>
diff --git a/dtd/esummary_gene.dtd b/dtd/esummary_gene.dtd
new file mode 100644
index 0000000..d84e288
--- /dev/null
+++ b/dtd/esummary_gene.dtd
@@ -0,0 +1,179 @@
+<!-- DocSum DTD for gene database -->
+
+<!--~~ !dtd
+~~json
+   <json type='esummary' version='0.3'>
+       <config lcnames='true'/>
+   </json>
+~~-->
+
+<!ENTITY	 % T_string		"(#PCDATA)">
+<!ENTITY	 % T_int		"(#PCDATA)">
+
+<!-- Definition of List type: T_MimListType -->
+<!ELEMENT	int	%T_int;>
+<!ENTITY	 % T_MimListType	"(int)*">
+
+<!-- Members definition of Structure type: T_GenomicInfoType -->
+<!ELEMENT	ChrLoc		%T_string;>
+<!ELEMENT	ChrAccVer		%T_string;>
+<!--~~ <ChrStart>
+~~json <number/>
+~~-->
+<!ELEMENT	ChrStart		%T_int;>
+<!--~~ <ChrStop>
+~~json <number/>
+~~-->
+<!ELEMENT	ChrStop		%T_int;>
+<!--~~ <ExonCount>
+~~json <number/>
+~~-->
+<!ELEMENT	ExonCount		%T_int;>
+
+<!-- Definition of Structure type: T_GenomicInfoType -->
+<!--~~ <GenomicInfoType>
+~~json <object/>
+~~-->
+<!ENTITY	 % T_GenomicInfoType "(
+			ChrLoc?,
+			ChrAccVer?,
+			ChrStart?,
+			ChrStop?,
+			ExonCount?
+			)
+			">
+
+<!-- Definition of List type: T_GenomicInfoListType -->
+<!ELEMENT	GenomicInfoType	%T_GenomicInfoType;>
+<!ENTITY	 % T_GenomicInfoListType	"(GenomicInfoType)*">
+
+<!-- Members definition of Structure type: T_OrganismType -->
+<!ELEMENT	ScientificName		%T_string;>
+<!ELEMENT	CommonName		%T_string;>
+<!--~~ <TaxID>
+~~json <number/>
+~~-->
+<!ELEMENT	TaxID		%T_int;>
+
+<!-- Definition of Structure type: T_OrganismType -->
+<!--~~ <OrganismType>
+~~json <object/>
+~~-->
+<!ENTITY	 % T_OrganismType "(
+			ScientificName?,
+			CommonName?,
+			TaxID?
+			)
+			">
+
+<!-- Members definition of Structure type: T_LocationHistType -->
+<!ELEMENT	AnnotationRelease		%T_string;>
+<!ELEMENT	AssemblyAccVer		%T_string;>
+<!-- Already defined ...
+	ChrAccVer	 as 	%T_string;
+ ... Already defined -->
+<!-- Already defined ...
+	ChrStart	 as 	%T_int;
+ ... Already defined -->
+<!-- Already defined ...
+	ChrStop	 as 	%T_int;
+ ... Already defined -->
+
+<!-- Definition of Structure type: T_LocationHistType -->
+<!--~~ <LocationHistType>
+~~json <object/>
+~~-->
+<!ENTITY	 % T_LocationHistType "(
+			AnnotationRelease?,
+			AssemblyAccVer?,
+			ChrAccVer?,
+			ChrStart?,
+			ChrStop?
+			)
+			">
+
+<!-- Definition of List type: T_LocationHistListType -->
+<!ELEMENT	LocationHistType	%T_LocationHistType;>
+<!ENTITY	 % T_LocationHistListType	"(LocationHistType)*">
+
+<!-- Members definition of Structure type: T_DocSum -->
+<!ELEMENT	Name		%T_string;>
+<!ELEMENT	Description		%T_string;>
+<!--~~ <Status>
+~~json <number/>
+~~-->
+<!ELEMENT	Status		%T_int;>
+<!--~~ <CurrentID>
+~~json <number/>
+~~-->
+<!ELEMENT	CurrentID		%T_int;>
+<!ELEMENT	Chromosome		%T_string;>
+<!ELEMENT	GeneticSource		%T_string;>
+<!ELEMENT	MapLocation		%T_string;>
+<!ELEMENT	OtherAliases		%T_string;>
+<!ELEMENT	OtherDesignations		%T_string;>
+<!ELEMENT	NomenclatureSymbol		%T_string;>
+<!ELEMENT	NomenclatureName		%T_string;>
+<!ELEMENT	NomenclatureStatus		%T_string;>
+<!ELEMENT	Mim		%T_MimListType;>
+<!ELEMENT	GenomicInfo		%T_GenomicInfoListType;>
+<!--~~ <GeneWeight>
+~~json <number/>
+~~-->
+<!ELEMENT	GeneWeight		%T_int;>
+<!ELEMENT	Summary		%T_string;>
+<!ELEMENT	ChrSort		%T_string;>
+<!-- Already defined ...
+	ChrStart	 as 	%T_int;
+ ... Already defined -->
+<!ELEMENT	Organism		%T_OrganismType;>
+<!ELEMENT	LocationHist		%T_LocationHistListType;>
+<!ELEMENT	error		%T_string;>
+
+<!-- Definition of Structure type: T_DocSum -->
+<!--~~ <DocumentSummary>
+~~json <object name='@uid'/>
+~~-->
+<!ENTITY	 % T_DocSum "((
+			Name?,
+			Description?,
+			Status?,
+			CurrentID?,
+			Chromosome?,
+			GeneticSource?,
+			MapLocation?,
+			OtherAliases?,
+			OtherDesignations?,
+			NomenclatureSymbol?,
+			NomenclatureName?,
+			NomenclatureStatus?,
+			Mim?,
+			GenomicInfo?,
+			GeneWeight?,
+			Summary?,
+			ChrSort?,
+			ChrStart?,
+			Organism?,
+			LocationHist?
+			)
+			| error)
+			">
+
+<!ELEMENT DocumentSummary %T_DocSum;>
+<!ATTLIST DocumentSummary uid CDATA #IMPLIED>
+
+<!ELEMENT DbBuild      %T_string;>
+<!ELEMENT DocumentSummarySet (DbBuild?, DocumentSummary*)>
+<!ATTLIST DocumentSummarySet status CDATA #REQUIRED>
+<!--~~ <DocumentSummarySet>
+~~json
+   <object key="result">
+       <array key="uids" select='DocumentSummary/@uid'/>
+       <members select='DocumentSummary'/>
+   </object>
+~~-->
+<!--~~ <eSummaryResult>
+~~ json <member/>
+~~-->
+
+<!ELEMENT eSummaryResult (DocumentSummarySet?)>
diff --git a/dtd/format.ent b/dtd/format.ent
new file mode 100644
index 0000000..1987ac2
--- /dev/null
+++ b/dtd/format.ent
@@ -0,0 +1,412 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Formatting Element Classes                        -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+ "-//NLM//DTD Archiving and Interchange DTD Suite Formatting Element Classes v2.0 20040830//EN"
+  Delivered as file "format.ent"                                   -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!--                                                               -->
+<!-- PURPOSE:    Elements concerned with rendition of output, for  -->
+<!--             example printing on a page or display on a screen -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definitions of format classes          -->
+<!--             2) Appearance class elements                      -->
+<!--             3) Break class elements                           -->
+<!--             4) Typographic emphasis elements                  -->
+<!--             5) Advanced overline and underline elements       -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  4. NEW MIXES - To correct potential classing problems, new 
+     Parameter Entities were created. The following content 
+     models were changed to use these new entities.
+       - <font>    %font-elements;
+
+  3. INLINE PARAMETER MIXES
+     ### Customization Alert ###
+     a. Changed the inline-mix Parameter Entities to use the 
+        OR-bar-first mechanism. This requires changing not
+        only the Parameter Entity, but all content models that
+        use the entity.
+        - %emphasized-text; (used in most of the elements below)
+
+  2. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+  
+  1. Updated public identifier to "v2.0 20040830"       
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+
+                        -%emphasized-text; - what elements can be 
+                                             inside an emphasis 
+                                             element
+                        -%rendition-plus;                          -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+
+
+<!--                    UNDERLINE ATTRIBUTES                       -->
+<!--                    Attributes for the <underline> element     -->
+<!ENTITY % underline-atts 
+            "underline-style   
+                        CDATA                              #IMPLIED" >
+
+
+<!-- ============================================================= -->
+<!--                    APPEARANCE CLASS ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!--                    FONT ELEMENTS                              -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <font> element.
+                        Design Note: This inline mix begins with an
+                        OR bar, since -%rendition-plus begins with
+                        one.                                       -->
+<!ENTITY % font-elements 
+                        "%rendition-plus;"                           >
+
+
+<!--                    FONT                                       -->
+<!--                    Defined to allow the user to specify an
+                        explicit (non stylesheet-generated) font.
+                        This element was originally restricted to 
+                        use inside table cells <td> and <th> and was 
+                        inherited from the XHTML table DTD.
+                        Authoring Note: Usage is discouraged.      -->
+<!ELEMENT  font         (#PCDATA %font-elements;)*                   >
+<!ATTLIST  font
+             color      CDATA                             #IMPLIED   >
+
+
+<!--                    HORIZONTAL RULE                            -->
+<!--                    Defined to allow the user to specify an
+                        explicit (non machine-generated) rule.
+                        This element is restricted to use inside
+                        table cells <td> and <th> and was inherited
+                        from the XHTML table DTD.
+                        Authoring Note: Usage is discouraged.      -->
+<!ELEMENT  hr           EMPTY                                        >
+
+
+<!-- ============================================================= -->
+<!--                    BREAK CLASS ELEMENTS                       -->
+<!-- ============================================================= -->
+
+
+<!--                    LINE BREAK                                 -->
+<!--                    Defined to allow the user to specify an
+                        explicit (non machine-generated) linebreak.
+                        This element is restricted to a very few
+                        contexts, for example inside <title>s
+                        and inside table cells <td> and <th>.
+                        Authoring Note: Usage is discouraged.      -->
+<!ELEMENT  break        EMPTY                                        >
+
+
+<!-- ============================================================= -->
+<!--                    EMPHASIS/RENDITION CLASS ELEMENTS          -->
+<!-- ============================================================= -->
+
+
+<!--                    BOLD                                       -->
+<!--                    Used to mark text that should appear in bold 
+                        face type for print or display             -->
+<!ELEMENT  bold         (#PCDATA %emphasized-text;)*                 >
+
+
+<!--                    ITALIC                                     -->
+<!--                    Used to mark text that should appear in 
+                        italic type on output.                     -->
+<!ELEMENT  italic       (#PCDATA %emphasized-text;)*                 >
+
+
+<!--                    MONOSPACE TEXT (TYPEWRITER TEXT)           -->
+<!--                    Used to mark text that should appear in 
+                        a non-proportional font, such as courier
+                        for display or print.  This is common for
+                        computer code examples, man-machine
+                        dialogues, etc.                            -->
+<!ELEMENT  monospace    (#PCDATA %emphasized-text;)*                 >
+
+
+
+<!--                    SMALL CAPS                                 -->
+<!--                    Used to mark text that should appear in a 
+                        font which creates smaller capital letters
+                        on output.                                 -->
+<!ELEMENT  sc           (#PCDATA %emphasized-text;)*                 >
+
+
+<!--                    OVERLINE                                   -->
+<!--                    Used to mark text that should appear with a 
+                        horizontal line above each character in
+                        display or print                           -->
+<!ELEMENT  overline     (#PCDATA %emphasized-text;)*                 >
+
+
+<!--                    STRIKE THROUGH                             -->
+<!--                    Used to mark text that should appear with 
+                        a line through it so as to appear "struck out" 
+                        on display or print                        -->
+<!ELEMENT  strike       (#PCDATA %emphasized-text;)*                 >
+
+
+<!--                    SUBSCRIPT                                  -->
+<!--                    A number or expression that is set lower
+                        than the baseline and slightly smaller,
+                        to act as an inferior or subscript         -->
+<!ELEMENT  sub          (#PCDATA %emphasized-text;)*                 >
+
+<!--         arrange    Used to indicate whether multiple subscripts
+                        or superscripts that apply to the same
+                        character should stack, i.e., be placed
+                        one above the other, or stagger, i.e., be
+                        stretched out in a line.                   -->
+<!ATTLIST  sub 
+             arrange    (stack | stagger)                  #IMPLIED  >
+
+
+<!--                    SUPERSCRIPT                                -->
+<!--                    A number or expression that is set higher
+                        than the baseline and slightly smaller,
+                        to act as a superior or superscript        -->
+<!ELEMENT  sup          (#PCDATA %emphasized-text;)*                 >
+
+                        
+<!--         arrange    Used to indicate whether multiple subscripts
+                        or superscripts that apply to the same
+                        character should stack, i.e., be placed
+                        one above the other as compactly as
+                        possible, or stagger, i.e., be stretched
+                        out in a line.                             -->
+<!ATTLIST  sup 
+             arrange    (stack | stagger)                  #IMPLIED  >
+
+
+<!--                    UNDERLINE                                  -->
+<!--                    Used to mark text that should appear with 
+                        a horizontal line beneath it for display
+                        or print                                   -->
+<!ELEMENT  underline    (#PCDATA %emphasized-text;)*                 >
+<!ATTLIST  underline 
+             %underline-atts;                                        >
+
+
+<!-- ============================================================= -->
+<!--                    ADVANCED UNDERLINE AND OVERLINE ELEMENTS
+                        (From the Elsevier DTD, used mostly within    
+                        mathematics, when ordinary MathML underline   
+                        and overline functions are inadequate. The
+                        elements act as milestone tags marking the
+                        start and end of over or underlining that
+                        may extend across element boundaries.)     -->
+<!-- ============================================================= -->
+
+
+<!--                    OVERLINE START                             -->
+<!--                    The start of a milestone-created overline, the
+                        end of ornament will be marked by an
+                        Overline End element.
+                        Remarks:
+                        The <overline-start> and <overline-end> 
+                        elements enable creation of overlines in 
+                        content, most commonly in mathematical 
+                        content, where an normal overline tag 
+                        <overline> would break the XML 
+                        well-formedness rule that no two elements
+                        may overlap.  The overline created using
+                        these two elements can have arbitrary start 
+                        and end points because the start and end 
+                        elements are paired through the use of the
+                        unique IDs, not as the start and end of a 
+                        single element.
+                        For example, in the text "ABCD", if the text
+                        "ABC" is the be overlined and the text "CD" 
+                        is to be underlined, ordinary overlining with
+                        <overline> would create invalid tag overlap. 
+                        The text could be correctly tagged, using the 
+                        Overline Start and Overline End elements
+                        as:
+                          <overline-start id="ovl4"/>AB
+                          <underline-start id="ul1"/>C
+                          </overline-end rid="ov14"/>D
+                          <underline-end rid="ul1"/>
+                                                                   -->
+<!ELEMENT  overline-start     
+                        EMPTY                                        >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  overline-start
+             id         ID                                 #REQUIRED >
+
+
+<!--                    OVERLINE END                               -->
+<!--                    The end of a milestone-created overline, the
+                        start of ornament will be marked by an
+                        Overline Start element.                    -->
+<!ELEMENT  overline-end EMPTY                                        >
+<!--         rid        Points to the identifier of an Overline 
+                        Start, so that the two may be linked       -->
+<!ATTLIST  overline-end
+             rid        IDREF                              #REQUIRED >
+
+
+<!--                    UNDERLINE START                            -->
+<!--                    The start of a milestone-created underline,
+                        the end of ornament will be marked by an
+                        Underline End element. 
+                        Remarks: The <underline-start> and 
+                        <underline-end> elements enable creation of 
+                        underlines in content, most commonly in 
+                        mathematical content, where an normal 
+                        underline tag <underline> would break the
+                        XML well-formedness rule that no two elements
+                        may overlap.  The underline created using
+                        these two elements can have arbitrary start 
+                        and end points because the start and end 
+                        elements are paired through the use of the
+                        unique IDs, not as the start and end of a 
+                        single element.
+                        For example, in the text "ABCD", if the text
+                        "ABC" is the be overlined and the text "CD" 
+                        is to be underlined, ordinary overlining with
+                        <overline> would create invalid tag overlap. 
+                        The text could be correctly tagged, using the 
+                        Overline Start and Overline End elements
+                        as:
+                          <overline-start id="ovl"/>AB
+                          <underline-start id="ul1"/>C
+                          </overline-end rid="ov1"/>D
+                          <underline-end rid="ul1"/>
+                                                                   -->
+<!ELEMENT  underline-start      
+                        EMPTY                                        >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  underline-start
+             id         ID                                 #REQUIRED >
+
+
+<!--                    UNDERLINE END                              -->
+<!--                    The end of a milestone-created underline, the
+                        start of ornament will be marked by an
+                        Underline Start element.                    -->
+<!ELEMENT  underline-end        
+                        EMPTY                                         >
+<!--         rid        Points to the identifier of an Underline 
+                        Start, so that the two may be linked        -->
+<!ATTLIST  underline-end
+             rid        IDREF                               #REQUIRED >
+
+
+<!-- ================== End Format Class Module =================== -->
diff --git a/dtd/htmltable.dtd b/dtd/htmltable.dtd
new file mode 100644
index 0000000..e463e4c
--- /dev/null
+++ b/dtd/htmltable.dtd
@@ -0,0 +1,334 @@
+<!-- ...................................................................... -->
+<!-- XHTML Table Module  .................................................. -->
+<!-- file: xhtml-table-1.mod
+
+     This is XHTML, a reformulation of HTML as a modular XML application.
+     Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
+     Revision: $Id: htmltable.dtd,v 1.3 2004/12/28 20:31:20 beck Exp $ SMI
+
+     This DTD module is identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//ELEMENTS XHTML Tables 1.0//EN"
+       SYSTEM "http://www.w3.org/TR/xhtml-modularization/DTD/xhtml-table-1.mod"
+
+     Revisions:
+     (none)
+     ....................................................................... -->
+
+<!-- Tables
+
+        table, caption, thead, tfoot, tbody, colgroup, col, tr, th, td
+
+     This module declares element types and attributes used to provide
+     table markup similar to HTML 4, including features that enable
+     better accessibility for non-visual user agents.
+-->
+
+<!-- declare qualified element type names:
+-->
+<!ENTITY % table.qname  "table" >
+<!ENTITY % caption.qname  "caption" >
+<!ENTITY % thead.qname  "thead" >
+<!ENTITY % tfoot.qname  "tfoot" >
+<!ENTITY % tbody.qname  "tbody" >
+<!ENTITY % colgroup.qname  "colgroup" >
+<!ENTITY % col.qname  "col" >
+<!ENTITY % tr.qname  "tr" >
+<!ENTITY % th.qname  "th" >
+<!ENTITY % td.qname  "td" >
+
+<!-- The frame attribute specifies which parts of the frame around
+     the table should be rendered. The values are not the same as
+     CALS to avoid a name clash with the valign attribute.
+-->
+<!ENTITY % frame.attrib
+     "frame        ( void
+                   | above
+                   | below
+                   | hsides
+                   | lhs
+                   | rhs
+                   | vsides
+                   | box
+                   | border )               #IMPLIED"
+>
+
+<!-- The rules attribute defines which rules to draw between cells:
+
+     If rules is absent then assume:
+
+       "none" if border is absent or border="0" otherwise "all"
+-->
+<!ENTITY % rules.attrib
+     "rules        ( none
+                   | groups
+                   | rows
+                   | cols
+                   | all )                  #IMPLIED"
+>
+
+<!-- horizontal alignment attributes for cell contents
+-->
+<!ENTITY % CellHAlign.attrib
+     "align        ( left
+                   | center
+                   | right
+                   | justify
+                   | char )                 #IMPLIED
+      char         %Character.datatype;     #IMPLIED
+      charoff      %Length.datatype;        #IMPLIED"
+>
+
+<!-- vertical alignment attribute for cell contents
+-->
+<!ENTITY % CellVAlign.attrib
+     "valign       ( top
+                   | middle
+                   | bottom
+                   | baseline )             #IMPLIED"
+>
+
+<!-- scope is simpler than axes attribute for common tables
+-->
+<!ENTITY % scope.attrib
+     "scope        ( row
+                   | col
+                   | rowgroup
+                   | colgroup )             #IMPLIED"
+>
+
+<!-- table: Table Element .............................. -->
+
+<!ENTITY % table.element  "INCLUDE" >
+<![%table.element;[
+<!ENTITY % table.content
+     "( %caption.qname;?, ( %col.qname;* | %colgroup.qname;* ),
+      (( %thead.qname;?, %tfoot.qname;?, %tbody.qname;+ ) | ( %tr.qname;+ )))"
+>
+<!ELEMENT %table.qname;  %table.content; >
+<!-- end of table.element -->]]>
+
+<!ENTITY % table.attlist  "INCLUDE" >
+<![%table.attlist;[
+<!ATTLIST %table.qname;
+      %Common.attrib;
+      summary      %Text.datatype;          #IMPLIED
+      width        %Length.datatype;        #IMPLIED
+      border       %Pixels.datatype;        #IMPLIED
+      %frame.attrib;
+      %rules.attrib;
+      cellspacing  %Length.datatype;        #IMPLIED
+      cellpadding  %Length.datatype;        #IMPLIED
+>
+<!-- end of table.attlist -->]]>
+
+<!-- caption: Table Caption ............................ -->
+
+<!ENTITY % caption.element  "INCLUDE" >
+<![%caption.element;[
+<!ENTITY % caption.content
+     "( #PCDATA | %Inline.mix; )*"
+>
+<!ELEMENT %caption.qname;  %caption.content; >
+<!-- end of caption.element -->]]>
+
+<!ENTITY % caption.attlist  "INCLUDE" >
+<![%caption.attlist;[
+<!ATTLIST %caption.qname;
+      %Common.attrib;
+>
+<!-- end of caption.attlist -->]]>
+
+<!-- thead: Table Header ............................... -->
+
+<!-- Use thead to duplicate headers when breaking table
+     across page boundaries, or for static headers when
+     tbody sections are rendered in scrolling panel.
+-->
+
+<!ENTITY % thead.element  "INCLUDE" >
+<![%thead.element;[
+<!ENTITY % thead.content  "( %tr.qname; )+" >
+<!ELEMENT %thead.qname;  %thead.content; >
+<!-- end of thead.element -->]]>
+
+<!ENTITY % thead.attlist  "INCLUDE" >
+<![%thead.attlist;[
+<!ATTLIST %thead.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of thead.attlist -->]]>
+
+<!-- tfoot: Table Footer ............................... -->
+
+<!-- Use tfoot to duplicate footers when breaking table
+     across page boundaries, or for static footers when
+     tbody sections are rendered in scrolling panel.
+-->
+
+<!ENTITY % tfoot.element  "INCLUDE" >
+<![%tfoot.element;[
+<!ENTITY % tfoot.content  "( %tr.qname; )+" >
+<!ELEMENT %tfoot.qname;  %tfoot.content; >
+<!-- end of tfoot.element -->]]>
+
+<!ENTITY % tfoot.attlist  "INCLUDE" >
+<![%tfoot.attlist;[
+<!ATTLIST %tfoot.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of tfoot.attlist -->]]>
+
+<!-- tbody: Table Body ................................. -->
+
+<!-- Use multiple tbody sections when rules are needed
+     between groups of table rows.
+-->
+
+<!ENTITY % tbody.element  "INCLUDE" >
+<![%tbody.element;[
+<!ENTITY % tbody.content  "( %tr.qname; )+" >
+<!ELEMENT %tbody.qname;  %tbody.content; >
+<!-- end of tbody.element -->]]>
+
+<!ENTITY % tbody.attlist  "INCLUDE" >
+<![%tbody.attlist;[
+<!ATTLIST %tbody.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of tbody.attlist -->]]>
+
+<!-- colgroup: Table Column Group ...................... -->
+
+<!-- colgroup groups a set of col elements. It allows you
+     to group several semantically-related columns together.
+-->
+
+<!ENTITY % colgroup.element  "INCLUDE" >
+<![%colgroup.element;[
+<!ENTITY % colgroup.content  "( %col.qname; )*" >
+<!ELEMENT %colgroup.qname;  %colgroup.content; >
+<!-- end of colgroup.element -->]]>
+
+<!ENTITY % colgroup.attlist  "INCLUDE" >
+<![%colgroup.attlist;[
+<!ATTLIST %colgroup.qname;
+      %Common.attrib;
+      span         %Number.datatype;        '1'
+      width        %MultiLength.datatype;   #IMPLIED
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of colgroup.attlist -->]]>
+
+<!-- col: Table Column ................................. -->
+
+<!-- col elements define the alignment properties for
+     cells in one or more columns.
+
+     The width attribute specifies the width of the
+     columns, e.g.
+
+       width="64"        width in screen pixels
+       width="0.5*"      relative width of 0.5
+
+     The span attribute causes the attributes of one
+     col element to apply to more than one column.
+-->
+
+<!ENTITY % col.element  "INCLUDE" >
+<![%col.element;[
+<!ENTITY % col.content  "EMPTY" >
+<!ELEMENT %col.qname;  %col.content; >
+<!-- end of col.element -->]]>
+
+<!ENTITY % col.attlist  "INCLUDE" >
+<![%col.attlist;[
+<!ATTLIST %col.qname;
+      %Common.attrib;
+      span         %Number.datatype;        '1'
+      width        %MultiLength.datatype;   #IMPLIED
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of col.attlist -->]]>
+
+<!-- tr: Table Row ..................................... -->
+
+<!ENTITY % tr.element  "INCLUDE" >
+<![%tr.element;[
+<!ENTITY % tr.content  "( %th.qname; | %td.qname; )+" >
+<!ELEMENT %tr.qname;  %tr.content; >
+<!-- end of tr.element -->]]>
+
+<!ENTITY % tr.attlist  "INCLUDE" >
+<![%tr.attlist;[
+<!ATTLIST %tr.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of tr.attlist -->]]>
+
+<!-- th: Table Header Cell ............................. -->
+
+<!-- th is for header cells, td for data,
+     but for cells acting as both use td
+-->
+
+<!ENTITY % th.element  "INCLUDE" >
+<![%th.element;[
+<!ENTITY % th.content
+     "( #PCDATA | %Flow.mix; )*"
+>
+<!ELEMENT %th.qname;  %th.content; >
+<!-- end of th.element -->]]>
+
+<!ENTITY % th.attlist  "INCLUDE" >
+<![%th.attlist;[
+<!ATTLIST %th.qname;
+      %Common.attrib;
+      abbr         %Text.datatype;          #IMPLIED
+      axis         CDATA                    #IMPLIED
+      headers      IDREFS                   #IMPLIED
+      %scope.attrib;
+      rowspan      %Number.datatype;        '1'
+      colspan      %Number.datatype;        '1'
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of th.attlist -->]]>
+
+<!-- td: Table Data Cell ............................... -->
+
+<!ENTITY % td.element  "INCLUDE" >
+<![%td.element;[
+<!ENTITY % td.content
+     "( #PCDATA | %Flow.mix; )*"
+>
+<!ELEMENT %td.qname;  %td.content; >
+<!-- end of td.element -->]]>
+
+<!ENTITY % td.attlist  "INCLUDE" >
+<![%td.attlist;[
+<!ATTLIST %td.qname;
+      %Common.attrib;
+      abbr         %Text.datatype;          #IMPLIED
+      axis         CDATA                    #IMPLIED
+      headers      IDREFS                   #IMPLIED
+      %scope.attrib;
+      rowspan      %Number.datatype;        '1'
+      colspan      %Number.datatype;        '1'
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of td.attlist -->]]>
+
+<!-- end of xhtml-table-1.mod -->
+
diff --git a/dtd/isoamsa.ent b/dtd/isoamsa.ent
new file mode 100644
index 0000000..c413168
--- /dev/null
+++ b/dtd/isoamsa.ent
@@ -0,0 +1,167 @@
+
+<!--
+     File isoamsa.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY angzarr          "&#x0237C;" ><!--angle with down zig-zag arrow -->
+<!ENTITY cirmid           "&#x02AEF;" ><!--circle, mid below -->
+<!ENTITY cudarrl          "&#x02938;" ><!--left, curved, down arrow -->
+<!ENTITY cudarrr          "&#x02935;" ><!--right, curved, down arrow -->
+<!ENTITY cularr           "&#x021B6;" ><!--/curvearrowleft A: left curved arrow -->
+<!ENTITY cularrp          "&#x0293D;" ><!--curved left arrow with plus -->
+<!ENTITY curarr           "&#x021B7;" ><!--/curvearrowright A: rt curved arrow -->
+<!ENTITY curarrm          "&#x0293C;" ><!--curved right arrow with minus -->
+<!ENTITY Darr             "&#x021A1;" ><!--down two-headed arrow -->
+<!ENTITY dArr             "&#x021D3;" ><!--/Downarrow A: down dbl arrow -->
+<!ENTITY ddarr            "&#x021CA;" ><!--/downdownarrows A: two down arrows -->
+<!ENTITY DDotrahd         "&#x02911;" ><!--right arrow with dotted stem -->
+<!ENTITY dfisht           "&#x0297F;" ><!--down fish tail -->
+<!ENTITY dHar             "&#x02965;" ><!--down harpoon-left, down harpoon-right -->
+<!ENTITY dharl            "&#x021C3;" ><!--/downharpoonleft A: dn harpoon-left -->
+<!ENTITY dharr            "&#x021C2;" ><!--/downharpoonright A: down harpoon-rt -->
+<!ENTITY duarr            "&#x021F5;" ><!--down arrow, up arrow -->
+<!ENTITY duhar            "&#x0296F;" ><!--down harp, up harp -->
+<!ENTITY dzigrarr         "&#x027FF;" ><!--right long zig-zag arrow -->
+<!ENTITY erarr            "&#x02971;" ><!--equal, right arrow below -->
+<!ENTITY hArr             "&#x021D4;" ><!--/Leftrightarrow A: l&r dbl arrow -->
+<!ENTITY harr             "&#x02194;" ><!--/leftrightarrow A: l&r arrow -->
+<!ENTITY harrcir          "&#x02948;" ><!--left and right arrow with a circle -->
+<!ENTITY harrw            "&#x021AD;" ><!--/leftrightsquigarrow A: l&r arr-wavy -->
+<!ENTITY hoarr            "&#x021FF;" ><!--horizontal open arrow -->
+<!ENTITY imof             "&#x022B7;" ><!--image of -->
+<!ENTITY lAarr            "&#x021DA;" ><!--/Lleftarrow A: left triple arrow -->
+<!ENTITY Larr             "&#x0219E;" ><!--/twoheadleftarrow A: -->
+<!ENTITY larrbfs          "&#x0291F;" ><!--left arrow-bar, filled square -->
+<!ENTITY larrfs           "&#x0291D;" ><!--left arrow, filled square -->
+<!ENTITY larrhk           "&#x021A9;" ><!--/hookleftarrow A: left arrow-hooked -->
+<!ENTITY larrlp           "&#x021AB;" ><!--/looparrowleft A: left arrow-looped -->
+<!ENTITY larrpl           "&#x02939;" ><!--left arrow, plus -->
+<!ENTITY larrsim          "&#x02973;" ><!--left arrow, similar -->
+<!ENTITY larrtl           "&#x021A2;" ><!--/leftarrowtail A: left arrow-tailed -->
+<!ENTITY lAtail           "&#x0291B;" ><!--left double arrow-tail -->
+<!ENTITY latail           "&#x02919;" ><!--left arrow-tail -->
+<!ENTITY lBarr            "&#x0290E;" ><!--left doubly broken arrow -->
+<!ENTITY lbarr            "&#x0290C;" ><!--left broken arrow -->
+<!ENTITY ldca             "&#x02936;" ><!--left down curved arrow -->
+<!ENTITY ldrdhar          "&#x02967;" ><!--left harpoon-down over right harpoon-down -->
+<!ENTITY ldrushar         "&#x0294B;" ><!--left-down-right-up harpoon -->
+<!ENTITY ldsh             "&#x021B2;" ><!--left down angled arrow -->
+<!ENTITY lfisht           "&#x0297C;" ><!--left fish tail -->
+<!ENTITY lHar             "&#x02962;" ><!--left harpoon-up over left harpoon-down -->
+<!ENTITY lhard            "&#x021BD;" ><!--/leftharpoondown A: l harpoon-down -->
+<!ENTITY lharu            "&#x021BC;" ><!--/leftharpoonup A: left harpoon-up -->
+<!ENTITY lharul           "&#x0296A;" ><!--left harpoon-up over long dash -->
+<!ENTITY llarr            "&#x021C7;" ><!--/leftleftarrows A: two left arrows -->
+<!ENTITY llhard           "&#x0296B;" ><!--left harpoon-down below long dash -->
+<!ENTITY loarr            "&#x021FD;" ><!--left open arrow -->
+<!ENTITY lrarr            "&#x021C6;" ><!--/leftrightarrows A: l arr over r arr -->
+<!ENTITY lrhar            "&#x021CB;" ><!--/leftrightharpoons A: l harp over r -->
+<!ENTITY lrhard           "&#x0296D;" ><!--right harpoon-down below long dash -->
+<!ENTITY lsh              "&#x021B0;" ><!--/Lsh A: -->
+<!ENTITY lurdshar         "&#x0294A;" ><!--left-up-right-down harpoon -->
+<!ENTITY luruhar          "&#x02966;" ><!--left harpoon-up over right harpoon-up -->
+<!ENTITY Map              "&#x02905;" ><!--twoheaded mapsto -->
+<!ENTITY map              "&#x021A6;" ><!--/mapsto A: -->
+<!ENTITY midcir           "&#x02AF0;" ><!--mid, circle below  -->
+<!ENTITY mumap            "&#x022B8;" ><!--/multimap A: -->
+<!ENTITY nearhk           "&#x02924;" ><!--NE arrow-hooked -->
+<!ENTITY neArr            "&#x021D7;" ><!--NE pointing dbl arrow -->
+<!ENTITY nearr            "&#x02197;" ><!--/nearrow A: NE pointing arrow -->
+<!ENTITY nesear           "&#x02928;" ><!--/toea A: NE & SE arrows -->
+<!ENTITY nhArr            "&#x021CE;" ><!--/nLeftrightarrow A: not l&r dbl arr -->
+<!ENTITY nharr            "&#x021AE;" ><!--/nleftrightarrow A: not l&r arrow -->
+<!ENTITY nlArr            "&#x021CD;" ><!--/nLeftarrow A: not implied by -->
+<!ENTITY nlarr            "&#x0219A;" ><!--/nleftarrow A: not left arrow -->
+<!ENTITY nrArr            "&#x021CF;" ><!--/nRightarrow A: not implies -->
+<!ENTITY nrarr            "&#x0219B;" ><!--/nrightarrow A: not right arrow -->
+<!ENTITY nrarrc           "&#x02933;&#x00338;" ><!--not right arrow-curved -->
+<!ENTITY nrarrw           "&#x0219D;&#x00338;" ><!--not right arrow-wavy -->
+<!ENTITY nvHarr           "&#x02904;" ><!--not, vert, left and right double arrow  -->
+<!ENTITY nvlArr           "&#x02902;" ><!--not, vert, left double arrow -->
+<!ENTITY nvrArr           "&#x02903;" ><!--not, vert, right double arrow -->
+<!ENTITY nwarhk           "&#x02923;" ><!--NW arrow-hooked -->
+<!ENTITY nwArr            "&#x021D6;" ><!--NW pointing dbl arrow -->
+<!ENTITY nwarr            "&#x02196;" ><!--/nwarrow A: NW pointing arrow -->
+<!ENTITY nwnear           "&#x02927;" ><!--NW & NE arrows -->
+<!ENTITY olarr            "&#x021BA;" ><!--/circlearrowleft A: l arr in circle -->
+<!ENTITY orarr            "&#x021BB;" ><!--/circlearrowright A: r arr in circle -->
+<!ENTITY origof           "&#x022B6;" ><!--original of -->
+<!ENTITY rAarr            "&#x021DB;" ><!--/Rrightarrow A: right triple arrow -->
+<!ENTITY Rarr             "&#x021A0;" ><!--/twoheadrightarrow A: -->
+<!ENTITY rarrap           "&#x02975;" ><!--approximate, right arrow above -->
+<!ENTITY rarrbfs          "&#x02920;" ><!--right arrow-bar, filled square -->
+<!ENTITY rarrc            "&#x02933;" ><!--right arrow-curved -->
+<!ENTITY rarrfs           "&#x0291E;" ><!--right arrow, filled square -->
+<!ENTITY rarrhk           "&#x021AA;" ><!--/hookrightarrow A: rt arrow-hooked -->
+<!ENTITY rarrlp           "&#x021AC;" ><!--/looparrowright A: rt arrow-looped -->
+<!ENTITY rarrpl           "&#x02945;" ><!--right arrow, plus -->
+<!ENTITY rarrsim          "&#x02974;" ><!--right arrow, similar -->
+<!ENTITY Rarrtl           "&#x02916;" ><!--right two-headed arrow with tail -->
+<!ENTITY rarrtl           "&#x021A3;" ><!--/rightarrowtail A: rt arrow-tailed -->
+<!ENTITY rarrw            "&#x0219D;" ><!--/rightsquigarrow A: rt arrow-wavy -->
+<!ENTITY rAtail           "&#x0291C;" ><!--right double arrow-tail -->
+<!ENTITY ratail           "&#x0291A;" ><!--right arrow-tail -->
+<!ENTITY RBarr            "&#x02910;" ><!--/drbkarow A: twoheaded right broken arrow -->
+<!ENTITY rBarr            "&#x0290F;" ><!--/dbkarow A: right doubly broken arrow -->
+<!ENTITY rbarr            "&#x0290D;" ><!--/bkarow A: right broken arrow -->
+<!ENTITY rdca             "&#x02937;" ><!--right down curved arrow -->
+<!ENTITY rdldhar          "&#x02969;" ><!--right harpoon-down over left harpoon-down -->
+<!ENTITY rdsh             "&#x021B3;" ><!--right down angled arrow -->
+<!ENTITY rfisht           "&#x0297D;" ><!--right fish tail -->
+<!ENTITY rHar             "&#x02964;" ><!--right harpoon-up over right harpoon-down -->
+<!ENTITY rhard            "&#x021C1;" ><!--/rightharpoondown A: rt harpoon-down -->
+<!ENTITY rharu            "&#x021C0;" ><!--/rightharpoonup A: rt harpoon-up -->
+<!ENTITY rharul           "&#x0296C;" ><!--right harpoon-up over long dash -->
+<!ENTITY rlarr            "&#x021C4;" ><!--/rightleftarrows A: r arr over l arr -->
+<!ENTITY rlhar            "&#x021CC;" ><!--/rightleftharpoons A: r harp over l -->
+<!ENTITY roarr            "&#x021FE;" ><!--right open arrow -->
+<!ENTITY rrarr            "&#x021C9;" ><!--/rightrightarrows A: two rt arrows -->
+<!ENTITY rsh              "&#x021B1;" ><!--/Rsh A: -->
+<!ENTITY ruluhar          "&#x02968;" ><!--right harpoon-up over left harpoon-up -->
+<!ENTITY searhk           "&#x02925;" ><!--/hksearow A: SE arrow-hooken -->
+<!ENTITY seArr            "&#x021D8;" ><!--SE pointing dbl arrow -->
+<!ENTITY searr            "&#x02198;" ><!--/searrow A: SE pointing arrow -->
+<!ENTITY seswar           "&#x02929;" ><!--/tosa A: SE & SW arrows -->
+<!ENTITY simrarr          "&#x02972;" ><!--similar, right arrow below -->
+<!ENTITY slarr            "&#x02190;" ><!--short left arrow -->
+<!ENTITY srarr            "&#x02192;" ><!--short right arrow -->
+<!ENTITY swarhk           "&#x02926;" ><!--/hkswarow A: SW arrow-hooked -->
+<!ENTITY swArr            "&#x021D9;" ><!--SW pointing dbl arrow -->
+<!ENTITY swarr            "&#x02199;" ><!--/swarrow A: SW pointing arrow -->
+<!ENTITY swnwar           "&#x0292A;" ><!--SW & NW arrows -->
+<!ENTITY Uarr             "&#x0219F;" ><!--up two-headed arrow -->
+<!ENTITY uArr             "&#x021D1;" ><!--/Uparrow A: up dbl arrow -->
+<!ENTITY Uarrocir         "&#x02949;" ><!--up two-headed arrow above circle -->
+<!ENTITY udarr            "&#x021C5;" ><!--up arrow, down arrow -->
+<!ENTITY udhar            "&#x0296E;" ><!--up harp, down harp -->
+<!ENTITY ufisht           "&#x0297E;" ><!--up fish tail -->
+<!ENTITY uHar             "&#x02963;" ><!--up harpoon-left, up harpoon-right -->
+<!ENTITY uharl            "&#x021BF;" ><!--/upharpoonleft A: up harpoon-left -->
+<!ENTITY uharr            "&#x021BE;" ><!--/upharpoonright /restriction A: up harp-r -->
+<!ENTITY uuarr            "&#x021C8;" ><!--/upuparrows A: two up arrows -->
+<!ENTITY vArr             "&#x021D5;" ><!--/Updownarrow A: up&down dbl arrow -->
+<!ENTITY varr             "&#x02195;" ><!--/updownarrow A: up&down arrow -->
+<!ENTITY xhArr            "&#x027FA;" ><!--/Longleftrightarrow A: long l&r dbl arr -->
+<!ENTITY xharr            "&#x027F7;" ><!--/longleftrightarrow A: long l&r arr -->
+<!ENTITY xlArr            "&#x027F8;" ><!--/Longleftarrow A: long l dbl arrow -->
+<!ENTITY xlarr            "&#x027F5;" ><!--/longleftarrow A: long left arrow -->
+<!ENTITY xmap             "&#x027FC;" ><!--/longmapsto A: -->
+<!ENTITY xrArr            "&#x027F9;" ><!--/Longrightarrow A: long rt dbl arr -->
+<!ENTITY xrarr            "&#x027F6;" ><!--/longrightarrow A: long right arrow -->
+<!ENTITY zigrarr          "&#x021DD;" ><!--right zig-zag arrow -->
diff --git a/dtd/isoamsb.ent b/dtd/isoamsb.ent
new file mode 100644
index 0000000..b74414b
--- /dev/null
+++ b/dtd/isoamsb.ent
@@ -0,0 +1,143 @@
+
+<!--
+     File isoamsb.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     References to the VARIANT SELECTOR 1 character (&#x0FE00;)
+     should match the uses listed in Unicode Technical Report 25.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY ac               "&#x0223E;" ><!--most positive -->
+<!ENTITY acE              "&#x0223E;&#x00333;" ><!--most positive, two lines below -->
+<!ENTITY amalg            "&#x02A3F;" ><!--/amalg B: amalgamation or coproduct -->
+<!ENTITY barvee           "&#x022BD;" ><!--bar, vee -->
+<!ENTITY Barwed           "&#x02306;" ><!--/doublebarwedge B: log and, dbl bar above -->
+<!ENTITY barwed           "&#x02305;" ><!--/barwedge B: logical and, bar above -->
+<!ENTITY bsolb            "&#x029C5;" ><!--reverse solidus in square -->
+<!ENTITY Cap              "&#x022D2;" ><!--/Cap /doublecap B: dbl intersection -->
+<!ENTITY capand           "&#x02A44;" ><!--intersection, and -->
+<!ENTITY capbrcup         "&#x02A49;" ><!--intersection, bar, union -->
+<!ENTITY capcap           "&#x02A4B;" ><!--intersection, intersection, joined -->
+<!ENTITY capcup           "&#x02A47;" ><!--intersection above union -->
+<!ENTITY capdot           "&#x02A40;" ><!--intersection, with dot -->
+<!ENTITY caps             "&#x02229;&#x0FE00;" ><!--intersection, serifs -->
+<!ENTITY ccaps            "&#x02A4D;" ><!--closed intersection, serifs -->
+<!ENTITY ccups            "&#x02A4C;" ><!--closed union, serifs -->
+<!ENTITY ccupssm          "&#x02A50;" ><!--closed union, serifs, smash product -->
+<!ENTITY coprod           "&#x02210;" ><!--/coprod L: coproduct operator -->
+<!ENTITY Cup              "&#x022D3;" ><!--/Cup /doublecup B: dbl union -->
+<!ENTITY cupbrcap         "&#x02A48;" ><!--union, bar, intersection -->
+<!ENTITY cupcap           "&#x02A46;" ><!--union above intersection -->
+<!ENTITY cupcup           "&#x02A4A;" ><!--union, union, joined -->
+<!ENTITY cupdot           "&#x0228D;" ><!--union, with dot -->
+<!ENTITY cupor            "&#x02A45;" ><!--union, or -->
+<!ENTITY cups             "&#x0222A;&#x0FE00;" ><!--union, serifs -->
+<!ENTITY cuvee            "&#x022CE;" ><!--/curlyvee B: curly logical or -->
+<!ENTITY cuwed            "&#x022CF;" ><!--/curlywedge B: curly logical and -->
+<!ENTITY Dagger           "&#x02021;" ><!--/ddagger B: double dagger relation -->
+<!ENTITY dagger           "&#x02020;" ><!--/dagger B: dagger relation -->
+<!ENTITY diam             "&#x022C4;" ><!--/diamond B: open diamond -->
+<!ENTITY divonx           "&#x022C7;" ><!--/divideontimes B: division on times -->
+<!ENTITY eplus            "&#x02A71;" ><!--equal, plus -->
+<!ENTITY hercon           "&#x022B9;" ><!--hermitian conjugate matrix -->
+<!ENTITY intcal           "&#x022BA;" ><!--/intercal B: intercal -->
+<!ENTITY iprod            "&#x02A3C;" ><!--/intprod -->
+<!ENTITY loplus           "&#x02A2D;" ><!--plus sign in left half circle -->
+<!ENTITY lotimes          "&#x02A34;" ><!--multiply sign in left half circle  -->
+<!ENTITY lthree           "&#x022CB;" ><!--/leftthreetimes B: -->
+<!ENTITY ltimes           "&#x022C9;" ><!--/ltimes B: times sign, left closed -->
+<!ENTITY midast           "&#x0002A;" ><!--/ast B: asterisk -->
+<!ENTITY minusb           "&#x0229F;" ><!--/boxminus B: minus sign in box -->
+<!ENTITY minusd           "&#x02238;" ><!--/dotminus B: minus sign, dot above -->
+<!ENTITY minusdu          "&#x02A2A;" ><!--minus sign, dot below -->
+<!ENTITY ncap             "&#x02A43;" ><!--bar, intersection -->
+<!ENTITY ncup             "&#x02A42;" ><!--bar, union -->
+<!ENTITY oast             "&#x0229B;" ><!--/circledast B: asterisk in circle -->
+<!ENTITY ocir             "&#x0229A;" ><!--/circledcirc B: small circle in circle -->
+<!ENTITY odash            "&#x0229D;" ><!--/circleddash B: hyphen in circle -->
+<!ENTITY odiv             "&#x02A38;" ><!--divide in circle -->
+<!ENTITY odot             "&#x02299;" ><!--/odot B: middle dot in circle -->
+<!ENTITY odsold           "&#x029BC;" ><!--dot, solidus, dot in circle -->
+<!ENTITY ofcir            "&#x029BF;" ><!--filled circle in circle -->
+<!ENTITY ogt              "&#x029C1;" ><!--greater-than in circle -->
+<!ENTITY ohbar            "&#x029B5;" ><!--circle with horizontal bar -->
+<!ENTITY olcir            "&#x029BE;" ><!--large circle in circle -->
+<!ENTITY olt              "&#x029C0;" ><!--less-than in circle -->
+<!ENTITY omid             "&#x029B6;" ><!--vertical bar in circle -->
+<!ENTITY ominus           "&#x02296;" ><!--/ominus B: minus sign in circle -->
+<!ENTITY opar             "&#x029B7;" ><!--parallel in circle -->
+<!ENTITY operp            "&#x029B9;" ><!--perpendicular in circle -->
+<!ENTITY oplus            "&#x02295;" ><!--/oplus B: plus sign in circle -->
+<!ENTITY osol             "&#x02298;" ><!--/oslash B: solidus in circle -->
+<!ENTITY Otimes           "&#x02A37;" ><!--multiply sign in double circle -->
+<!ENTITY otimes           "&#x02297;" ><!--/otimes B: multiply sign in circle -->
+<!ENTITY otimesas         "&#x02A36;" ><!--multiply sign in circle, circumflex accent -->
+<!ENTITY ovbar            "&#x0233D;" ><!--circle with vertical bar -->
+<!ENTITY plusacir         "&#x02A23;" ><!--plus, circumflex accent above -->
+<!ENTITY plusb            "&#x0229E;" ><!--/boxplus B: plus sign in box -->
+<!ENTITY pluscir          "&#x02A22;" ><!--plus, small circle above -->
+<!ENTITY plusdo           "&#x02214;" ><!--/dotplus B: plus sign, dot above -->
+<!ENTITY plusdu           "&#x02A25;" ><!--plus sign, dot below -->
+<!ENTITY pluse            "&#x02A72;" ><!--plus, equals -->
+<!ENTITY plussim          "&#x02A26;" ><!--plus, similar below -->
+<!ENTITY plustwo          "&#x02A27;" ><!--plus, two; Nim-addition -->
+<!ENTITY prod             "&#x0220F;" ><!--/prod L: product operator -->
+<!ENTITY race             "&#x029DA;" ><!--reverse most positive, line below -->
+<!ENTITY roplus           "&#x02A2E;" ><!--plus sign in right half circle -->
+<!ENTITY rotimes          "&#x02A35;" ><!--multiply sign in right half circle -->
+<!ENTITY rthree           "&#x022CC;" ><!--/rightthreetimes B: -->
+<!ENTITY rtimes           "&#x022CA;" ><!--/rtimes B: times sign, right closed -->
+<!ENTITY sdot             "&#x022C5;" ><!--/cdot B: small middle dot -->
+<!ENTITY sdotb            "&#x022A1;" ><!--/dotsquare /boxdot B: small dot in box -->
+<!ENTITY setmn            "&#x02216;" ><!--/setminus B: reverse solidus -->
+<!ENTITY simplus          "&#x02A24;" ><!--plus, similar above -->
+<!ENTITY smashp           "&#x02A33;" ><!--smash product -->
+<!ENTITY solb             "&#x029C4;" ><!--solidus in square -->
+<!ENTITY sqcap            "&#x02293;" ><!--/sqcap B: square intersection -->
+<!ENTITY sqcaps           "&#x02293;&#x0FE00;" ><!--square intersection, serifs -->
+<!ENTITY sqcup            "&#x02294;" ><!--/sqcup B: square union -->
+<!ENTITY sqcups           "&#x02294;&#x0FE00;" ><!--square union, serifs -->
+<!ENTITY ssetmn           "&#x02216;" ><!--/smallsetminus B: sm reverse solidus -->
+<!ENTITY sstarf           "&#x022C6;" ><!--/star B: small star, filled -->
+<!ENTITY subdot           "&#x02ABD;" ><!--subset, with dot -->
+<!ENTITY sum              "&#x02211;" ><!--/sum L: summation operator -->
+<!ENTITY supdot           "&#x02ABE;" ><!--superset, with dot -->
+<!ENTITY timesb           "&#x022A0;" ><!--/boxtimes B: multiply sign in box -->
+<!ENTITY timesbar         "&#x02A31;" ><!--multiply sign, bar below -->
+<!ENTITY timesd           "&#x02A30;" ><!--times, dot -->
+<!ENTITY tridot           "&#x025EC;" ><!--dot in triangle -->
+<!ENTITY triminus         "&#x02A3A;" ><!--minus in triangle -->
+<!ENTITY triplus          "&#x02A39;" ><!--plus in triangle -->
+<!ENTITY trisb            "&#x029CD;" ><!--triangle, serifs at bottom -->
+<!ENTITY tritime          "&#x02A3B;" ><!--multiply in triangle -->
+<!ENTITY uplus            "&#x0228E;" ><!--/uplus B: plus sign in union -->
+<!ENTITY veebar           "&#x022BB;" ><!--/veebar B: logical or, bar below -->
+<!ENTITY wedbar           "&#x02A5F;" ><!--wedge, bar below -->
+<!ENTITY wreath           "&#x02240;" ><!--/wr B: wreath product -->
+<!ENTITY xcap             "&#x022C2;" ><!--/bigcap L: intersection operator -->
+<!ENTITY xcirc            "&#x025EF;" ><!--/bigcirc B: large circle -->
+<!ENTITY xcup             "&#x022C3;" ><!--/bigcup L: union operator -->
+<!ENTITY xdtri            "&#x025BD;" ><!--/bigtriangledown B: big dn tri, open -->
+<!ENTITY xodot            "&#x02A00;" ><!--/bigodot L: circle dot operator -->
+<!ENTITY xoplus           "&#x02A01;" ><!--/bigoplus L: circle plus operator -->
+<!ENTITY xotime           "&#x02A02;" ><!--/bigotimes L: circle times operator -->
+<!ENTITY xsqcup           "&#x02A06;" ><!--/bigsqcup L: square union operator -->
+<!ENTITY xuplus           "&#x02A04;" ><!--/biguplus L: -->
+<!ENTITY xutri            "&#x025B3;" ><!--/bigtriangleup B: big up tri, open -->
+<!ENTITY xvee             "&#x022C1;" ><!--/bigvee L: logical and operator -->
+<!ENTITY xwedge           "&#x022C0;" ><!--/bigwedge L: logical or operator -->
diff --git a/dtd/isoamsc.ent b/dtd/isoamsc.ent
new file mode 100644
index 0000000..46ea221
--- /dev/null
+++ b/dtd/isoamsc.ent
@@ -0,0 +1,43 @@
+
+<!--
+     File isoamsc.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY dlcorn           "&#x0231E;" ><!--/llcorner O: lower left corner -->
+<!ENTITY drcorn           "&#x0231F;" ><!--/lrcorner C: lower right corner -->
+<!ENTITY gtlPar           "&#x02995;" ><!--dbl left parenthesis, greater -->
+<!ENTITY langd            "&#x02991;" ><!--left angle, dot -->
+<!ENTITY lbrke            "&#x0298B;" ><!--left bracket, equal -->
+<!ENTITY lbrksld          "&#x0298F;" ><!--left bracket, solidus bottom corner -->
+<!ENTITY lbrkslu          "&#x0298D;" ><!--left bracket, solidus top corner -->
+<!ENTITY lceil            "&#x02308;" ><!--/lceil O: left ceiling -->
+<!ENTITY lfloor           "&#x0230A;" ><!--/lfloor O: left floor -->
+<!ENTITY lmoust           "&#x023B0;" ><!--/lmoustache -->
+<!ENTITY lparlt           "&#x02993;" ><!--O: left parenthesis, lt -->
+<!ENTITY ltrPar           "&#x02996;" ><!--dbl right parenthesis, less -->
+<!ENTITY rangd            "&#x02992;" ><!--right angle, dot -->
+<!ENTITY rbrke            "&#x0298C;" ><!--right bracket, equal -->
+<!ENTITY rbrksld          "&#x0298E;" ><!--right bracket, solidus bottom corner -->
+<!ENTITY rbrkslu          "&#x02990;" ><!--right bracket, solidus top corner -->
+<!ENTITY rceil            "&#x02309;" ><!--/rceil C: right ceiling -->
+<!ENTITY rfloor           "&#x0230B;" ><!--/rfloor C: right floor -->
+<!ENTITY rmoust           "&#x023B1;" ><!--/rmoustache -->
+<!ENTITY rpargt           "&#x02994;" ><!--C: right paren, gt -->
+<!ENTITY ulcorn           "&#x0231C;" ><!--/ulcorner O: upper left corner -->
+<!ENTITY urcorn           "&#x0231D;" ><!--/urcorner C: upper right corner -->
diff --git a/dtd/isoamsn.ent b/dtd/isoamsn.ent
new file mode 100644
index 0000000..a1df8b7
--- /dev/null
+++ b/dtd/isoamsn.ent
@@ -0,0 +1,114 @@
+
+<!--
+     File isoamsn.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     References to the VARIANT SELECTOR 1 character (&#x0FE00;)
+     should match the uses listed in Unicode Technical Report 25.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY gnap             "&#x02A8A;" ><!--/gnapprox N: greater, not approximate -->
+<!ENTITY gnE              "&#x02269;" ><!--/gneqq N: greater, not dbl equals -->
+<!ENTITY gne              "&#x02A88;" ><!--/gneq N: greater, not equals -->
+<!ENTITY gnsim            "&#x022E7;" ><!--/gnsim N: greater, not similar -->
+<!ENTITY gvnE             "&#x02269;&#x0FE00;" ><!--/gvertneqq N: gt, vert, not dbl eq -->
+<!ENTITY lnap             "&#x02A89;" ><!--/lnapprox N: less, not approximate -->
+<!ENTITY lnE              "&#x02268;" ><!--/lneqq N: less, not double equals -->
+<!ENTITY lne              "&#x02A87;" ><!--/lneq N: less, not equals -->
+<!ENTITY lnsim            "&#x022E6;" ><!--/lnsim N: less, not similar -->
+<!ENTITY lvnE             "&#x02268;&#x0FE00;" ><!--/lvertneqq N: less, vert, not dbl eq -->
+<!ENTITY nap              "&#x02249;" ><!--/napprox N: not approximate -->
+<!ENTITY napE             "&#x02A70;&#x00338;" ><!--not approximately equal or equal to -->
+<!ENTITY napid            "&#x0224B;&#x00338;" ><!--not approximately identical to -->
+<!ENTITY ncong            "&#x02247;" ><!--/ncong N: not congruent with -->
+<!ENTITY ncongdot         "&#x02A6D;&#x00338;" ><!--not congruent, dot -->
+<!ENTITY nequiv           "&#x02262;" ><!--/nequiv N: not identical with -->
+<!ENTITY ngE              "&#x02267;&#x00338;" ><!--/ngeqq N: not greater, dbl equals -->
+<!ENTITY nge              "&#x02271;" ><!--/ngeq N: not greater-than-or-equal -->
+<!ENTITY nges             "&#x02A7E;&#x00338;" ><!--/ngeqslant N: not gt-or-eq, slanted -->
+<!ENTITY nGg              "&#x022D9;&#x00338;" ><!--not triple greater than -->
+<!ENTITY ngsim            "&#x02275;" ><!--not greater, similar -->
+<!ENTITY nGt              "&#x0226B;&#x020D2;" ><!--not, vert, much greater than -->
+<!ENTITY ngt              "&#x0226F;" ><!--/ngtr N: not greater-than -->
+<!ENTITY nGtv             "&#x0226B;&#x00338;" ><!--not much greater than, variant -->
+<!ENTITY nlE              "&#x02266;&#x00338;" ><!--/nleqq N: not less, dbl equals -->
+<!ENTITY nle              "&#x02270;" ><!--/nleq N: not less-than-or-equal -->
+<!ENTITY nles             "&#x02A7D;&#x00338;" ><!--/nleqslant N: not less-or-eq, slant -->
+<!ENTITY nLl              "&#x022D8;&#x00338;" ><!--not triple less than -->
+<!ENTITY nlsim            "&#x02274;" ><!--not less, similar -->
+<!ENTITY nLt              "&#x0226A;&#x020D2;" ><!--not, vert, much less than -->
+<!ENTITY nlt              "&#x0226E;" ><!--/nless N: not less-than -->
+<!ENTITY nltri            "&#x022EA;" ><!--/ntriangleleft N: not left triangle -->
+<!ENTITY nltrie           "&#x022EC;" ><!--/ntrianglelefteq N: not l tri, eq -->
+<!ENTITY nLtv             "&#x0226A;&#x00338;" ><!--not much less than, variant -->
+<!ENTITY nmid             "&#x02224;" ><!--/nmid -->
+<!ENTITY npar             "&#x02226;" ><!--/nparallel N: not parallel -->
+<!ENTITY npr              "&#x02280;" ><!--/nprec N: not precedes -->
+<!ENTITY nprcue           "&#x022E0;" ><!--not curly precedes, eq -->
+<!ENTITY npre             "&#x02AAF;&#x00338;" ><!--/npreceq N: not precedes, equals -->
+<!ENTITY nrtri            "&#x022EB;" ><!--/ntriangleright N: not rt triangle -->
+<!ENTITY nrtrie           "&#x022ED;" ><!--/ntrianglerighteq N: not r tri, eq -->
+<!ENTITY nsc              "&#x02281;" ><!--/nsucc N: not succeeds -->
+<!ENTITY nsccue           "&#x022E1;" ><!--not succeeds, curly eq -->
+<!ENTITY nsce             "&#x02AB0;&#x00338;" ><!--/nsucceq N: not succeeds, equals -->
+<!ENTITY nsim             "&#x02241;" ><!--/nsim N: not similar -->
+<!ENTITY nsime            "&#x02244;" ><!--/nsimeq N: not similar, equals -->
+<!ENTITY nsmid            "&#x02224;" ><!--/nshortmid -->
+<!ENTITY nspar            "&#x02226;" ><!--/nshortparallel N: not short par -->
+<!ENTITY nsqsube          "&#x022E2;" ><!--not, square subset, equals -->
+<!ENTITY nsqsupe          "&#x022E3;" ><!--not, square superset, equals -->
+<!ENTITY nsub             "&#x02284;" ><!--not subset -->
+<!ENTITY nsubE            "&#x02AC5;&#x00338;" ><!--/nsubseteqq N: not subset, dbl eq -->
+<!ENTITY nsube            "&#x02288;" ><!--/nsubseteq N: not subset, equals -->
+<!ENTITY nsup             "&#x02285;" ><!--not superset -->
+<!ENTITY nsupE            "&#x02AC6;&#x00338;" ><!--/nsupseteqq N: not superset, dbl eq -->
+<!ENTITY nsupe            "&#x02289;" ><!--/nsupseteq N: not superset, equals -->
+<!ENTITY ntgl             "&#x02279;" ><!--not greater, less -->
+<!ENTITY ntlg             "&#x02278;" ><!--not less, greater -->
+<!ENTITY nvap             "&#x0224D;&#x020D2;" ><!--not, vert, approximate -->
+<!ENTITY nVDash           "&#x022AF;" ><!--/nVDash N: not dbl vert, dbl dash -->
+<!ENTITY nVdash           "&#x022AE;" ><!--/nVdash N: not dbl vertical, dash -->
+<!ENTITY nvDash           "&#x022AD;" ><!--/nvDash N: not vertical, dbl dash -->
+<!ENTITY nvdash           "&#x022AC;" ><!--/nvdash N: not vertical, dash -->
+<!ENTITY nvge             "&#x02265;&#x020D2;" ><!--not, vert, greater-than-or-equal -->
+<!ENTITY nvgt             "&#x0003E;&#x020D2;" ><!--not, vert, greater-than -->
+<!ENTITY nvle             "&#x02264;&#x020D2;" ><!--not, vert, less-than-or-equal -->
+<!ENTITY nvlt             "&#38;#x0003C;&#x020D2;" ><!--not, vert, less-than -->
+<!ENTITY nvltrie          "&#x022B4;&#x020D2;" ><!--not, vert, left triangle, equals -->
+<!ENTITY nvrtrie          "&#x022B5;&#x020D2;" ><!--not, vert, right triangle, equals -->
+<!ENTITY nvsim            "&#x0223C;&#x020D2;" ><!--not, vert, similar -->
+<!ENTITY parsim           "&#x02AF3;" ><!--parallel, similar -->
+<!ENTITY prnap            "&#x02AB9;" ><!--/precnapprox N: precedes, not approx -->
+<!ENTITY prnE             "&#x02AB5;" ><!--/precneqq N: precedes, not dbl eq -->
+<!ENTITY prnsim           "&#x022E8;" ><!--/precnsim N: precedes, not similar -->
+<!ENTITY rnmid            "&#x02AEE;" ><!--reverse /nmid -->
+<!ENTITY scnap            "&#x02ABA;" ><!--/succnapprox N: succeeds, not approx -->
+<!ENTITY scnE             "&#x02AB6;" ><!--/succneqq N: succeeds, not dbl eq -->
+<!ENTITY scnsim           "&#x022E9;" ><!--/succnsim N: succeeds, not similar -->
+<!ENTITY simne            "&#x02246;" ><!--similar, not equals -->
+<!ENTITY solbar           "&#x0233F;" ><!--solidus, bar through -->
+<!ENTITY subnE            "&#x02ACB;" ><!--/subsetneqq N: subset, not dbl eq -->
+<!ENTITY subne            "&#x0228A;" ><!--/subsetneq N: subset, not equals -->
+<!ENTITY supnE            "&#x02ACC;" ><!--/supsetneqq N: superset, not dbl eq -->
+<!ENTITY supne            "&#x0228B;" ><!--/supsetneq N: superset, not equals -->
+<!ENTITY vnsub            "&#x02282;&#x020D2;" ><!--/nsubset N: not subset, var -->
+<!ENTITY vnsup            "&#x02283;&#x020D2;" ><!--/nsupset N: not superset, var -->
+<!ENTITY vsubnE           "&#x02ACB;&#x0FE00;" ><!--/varsubsetneqq N: subset not dbl eq, var -->
+<!ENTITY vsubne           "&#x0228A;&#x0FE00;" ><!--/varsubsetneq N: subset, not eq, var -->
+<!ENTITY vsupnE           "&#x02ACC;&#x0FE00;" ><!--/varsupsetneqq N: super not dbl eq, var -->
+<!ENTITY vsupne           "&#x0228B;&#x0FE00;" ><!--/varsupsetneq N: superset, not eq, var -->
diff --git a/dtd/isoamso.ent b/dtd/isoamso.ent
new file mode 100644
index 0000000..f99cf11
--- /dev/null
+++ b/dtd/isoamso.ent
@@ -0,0 +1,73 @@
+
+<!--
+     File isoamso.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY ang              "&#x02220;" ><!--/angle - angle -->
+<!ENTITY ange             "&#x029A4;" ><!--angle, equal -->
+<!ENTITY angmsd           "&#x02221;" ><!--/measuredangle - angle-measured -->
+<!ENTITY angmsdaa         "&#x029A8;" ><!--angle-measured, arrow, up, right -->
+<!ENTITY angmsdab         "&#x029A9;" ><!--angle-measured, arrow, up, left -->
+<!ENTITY angmsdac         "&#x029AA;" ><!--angle-measured, arrow, down, right -->
+<!ENTITY angmsdad         "&#x029AB;" ><!--angle-measured, arrow, down, left -->
+<!ENTITY angmsdae         "&#x029AC;" ><!--angle-measured, arrow, right, up -->
+<!ENTITY angmsdaf         "&#x029AD;" ><!--angle-measured, arrow, left, up -->
+<!ENTITY angmsdag         "&#x029AE;" ><!--angle-measured, arrow, right, down -->
+<!ENTITY angmsdah         "&#x029AF;" ><!--angle-measured, arrow, left, down -->
+<!ENTITY angrtvb          "&#x022BE;" ><!--right angle-measured -->
+<!ENTITY angrtvbd         "&#x0299D;" ><!--right angle-measured, dot -->
+<!ENTITY bbrk             "&#x023B5;" ><!--bottom square bracket -->
+<!ENTITY bbrktbrk         "&#x023B6;" ><!--bottom above top square bracket -->
+<!ENTITY bemptyv          "&#x029B0;" ><!--reversed circle, slash -->
+<!ENTITY beth             "&#x02136;" ><!--/beth - beth, Hebrew -->
+<!ENTITY boxbox           "&#x029C9;" ><!--two joined squares -->
+<!ENTITY bprime           "&#x02035;" ><!--/backprime - reverse prime -->
+<!ENTITY bsemi            "&#x0204F;" ><!--reverse semi-colon -->
+<!ENTITY cemptyv          "&#x029B2;" ><!--circle, slash, small circle above -->
+<!ENTITY cirE             "&#x029C3;" ><!--circle, two horizontal stroked to the right -->
+<!ENTITY cirscir          "&#x029C2;" ><!--circle, small circle to the right -->
+<!ENTITY comp             "&#x02201;" ><!--/complement - complement sign -->
+<!ENTITY daleth           "&#x02138;" ><!--/daleth - daleth, Hebrew -->
+<!ENTITY demptyv          "&#x029B1;" ><!--circle, slash, bar above -->
+<!ENTITY ell              "&#x02113;" ><!--/ell - cursive small l -->
+<!ENTITY empty            "&#x02205;" ><!--/emptyset - zero, slash -->
+<!ENTITY emptyv           "&#x02205;" ><!--/varnothing - circle, slash -->
+<!ENTITY gimel            "&#x02137;" ><!--/gimel - gimel, Hebrew -->
+<!ENTITY iiota            "&#x02129;" ><!--inverted iota -->
+<!ENTITY image            "&#x02111;" ><!--/Im - imaginary   -->
+<!ENTITY imath            "&#x00131;" ><!--/imath - small i, no dot -->
+<!ENTITY jmath            "&#x0006A;" ><!--/jmath - small j, no dot -->
+<!ENTITY laemptyv         "&#x029B4;" ><!--circle, slash, left arrow above -->
+<!ENTITY lltri            "&#x025FA;" ><!--lower left triangle -->
+<!ENTITY lrtri            "&#x022BF;" ><!--lower right triangle -->
+<!ENTITY mho              "&#x02127;" ><!--/mho - conductance -->
+<!ENTITY nang             "&#x02220;&#x020D2;" ><!--not, vert, angle -->
+<!ENTITY nexist           "&#x02204;" ><!--/nexists - negated exists -->
+<!ENTITY oS               "&#x024C8;" ><!--/circledS - capital S in circle -->
+<!ENTITY planck           "&#x0210F;" ><!--/hbar - Planck's over 2pi -->
+<!ENTITY plankv           "&#x0210F;" ><!--/hslash - variant Planck's over 2pi -->
+<!ENTITY raemptyv         "&#x029B3;" ><!--circle, slash, right arrow above -->
+<!ENTITY range            "&#x029A5;" ><!--reverse angle, equal -->
+<!ENTITY real             "&#x0211C;" ><!--/Re - real -->
+<!ENTITY tbrk             "&#x023B4;" ><!--top square bracket -->
+<!ENTITY trpezium         "&#x0FFFD;" ><!--trapezium -->
+<!ENTITY ultri            "&#x025F8;" ><!--upper left triangle -->
+<!ENTITY urtri            "&#x025F9;" ><!--upper right triangle -->
+<!ENTITY vzigzag          "&#x0299A;" ><!--vertical zig-zag line -->
+<!ENTITY weierp           "&#x02118;" ><!--/wp - Weierstrass p -->
diff --git a/dtd/isoamsr.ent b/dtd/isoamsr.ent
new file mode 100644
index 0000000..2251ef1
--- /dev/null
+++ b/dtd/isoamsr.ent
@@ -0,0 +1,204 @@
+
+<!--
+     File isoamsr.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     References to the VARIANT SELECTOR 1 character (&#x0FE00;)
+     should match the uses listed in Unicode Technical Report 25.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY apE              "&#x02A70;" ><!--approximately equal or equal to -->
+<!ENTITY ape              "&#x0224A;" ><!--/approxeq R: approximate, equals -->
+<!ENTITY apid             "&#x0224B;" ><!--approximately identical to -->
+<!ENTITY asymp            "&#x02248;" ><!--/asymp R: asymptotically equal to -->
+<!ENTITY Barv             "&#x02AE7;" ><!--vert, dbl bar (over) -->
+<!ENTITY bcong            "&#x0224C;" ><!--/backcong R: reverse congruent -->
+<!ENTITY bepsi            "&#x003F6;" ><!--/backepsilon R: such that -->
+<!ENTITY bowtie           "&#x022C8;" ><!--/bowtie R: -->
+<!ENTITY bsim             "&#x0223D;" ><!--/backsim R: reverse similar -->
+<!ENTITY bsime            "&#x022CD;" ><!--/backsimeq R: reverse similar, eq -->
+<!ENTITY bsolhsub         "&#x0005C;&#x02282;" ><!--reverse solidus, subset -->
+<!ENTITY bump             "&#x0224E;" ><!--/Bumpeq R: bumpy equals -->
+<!ENTITY bumpE            "&#x02AAE;" ><!--bump, equals -->
+<!ENTITY bumpe            "&#x0224F;" ><!--/bumpeq R: bumpy equals, equals -->
+<!ENTITY cire             "&#x02257;" ><!--/circeq R: circle, equals -->
+<!ENTITY Colon            "&#x02237;" ><!--/Colon, two colons -->
+<!ENTITY Colone           "&#x02A74;" ><!--double colon, equals -->
+<!ENTITY colone           "&#x02254;" ><!--/coloneq R: colon, equals -->
+<!ENTITY congdot          "&#x02A6D;" ><!--congruent, dot -->
+<!ENTITY csub             "&#x02ACF;" ><!--subset, closed -->
+<!ENTITY csube            "&#x02AD1;" ><!--subset, closed, equals -->
+<!ENTITY csup             "&#x02AD0;" ><!--superset, closed -->
+<!ENTITY csupe            "&#x02AD2;" ><!--superset, closed, equals -->
+<!ENTITY cuepr            "&#x022DE;" ><!--/curlyeqprec R: curly eq, precedes -->
+<!ENTITY cuesc            "&#x022DF;" ><!--/curlyeqsucc R: curly eq, succeeds -->
+<!ENTITY Dashv            "&#x02AE4;" ><!--dbl dash, vertical -->
+<!ENTITY dashv            "&#x022A3;" ><!--/dashv R: dash, vertical -->
+<!ENTITY easter           "&#x02A6E;" ><!--equal, asterisk above -->
+<!ENTITY ecir             "&#x02256;" ><!--/eqcirc R: circle on equals sign -->
+<!ENTITY ecolon           "&#x02255;" ><!--/eqcolon R: equals, colon -->
+<!ENTITY eDDot            "&#x02A77;" ><!--/ddotseq R: equal with four dots -->
+<!ENTITY eDot             "&#x02251;" ><!--/doteqdot /Doteq R: eq, even dots -->
+<!ENTITY efDot            "&#x02252;" ><!--/fallingdotseq R: eq, falling dots -->
+<!ENTITY eg               "&#x02A9A;" ><!--equal-or-greater -->
+<!ENTITY egs              "&#x02A96;" ><!--/eqslantgtr R: equal-or-gtr, slanted -->
+<!ENTITY egsdot           "&#x02A98;" ><!--equal-or-greater, slanted, dot inside -->
+<!ENTITY el               "&#x02A99;" ><!--equal-or-less -->
+<!ENTITY els              "&#x02A95;" ><!--/eqslantless R: eq-or-less, slanted -->
+<!ENTITY elsdot           "&#x02A97;" ><!--equal-or-less, slanted, dot inside -->
+<!ENTITY equest           "&#x0225F;" ><!--/questeq R: equal with questionmark -->
+<!ENTITY equivDD          "&#x02A78;" ><!--equivalent, four dots above -->
+<!ENTITY erDot            "&#x02253;" ><!--/risingdotseq R: eq, rising dots -->
+<!ENTITY esdot            "&#x02250;" ><!--/doteq R: equals, single dot above -->
+<!ENTITY Esim             "&#x02A73;" ><!--equal, similar -->
+<!ENTITY esim             "&#x02242;" ><!--/esim R: equals, similar -->
+<!ENTITY fork             "&#x022D4;" ><!--/pitchfork R: pitchfork -->
+<!ENTITY forkv            "&#x02AD9;" ><!--fork, variant -->
+<!ENTITY frown            "&#x02322;" ><!--/frown R: down curve -->
+<!ENTITY gap              "&#x02A86;" ><!--/gtrapprox R: greater, approximate -->
+<!ENTITY gE               "&#x02267;" ><!--/geqq R: greater, double equals -->
+<!ENTITY gEl              "&#x02A8C;" ><!--/gtreqqless R: gt, dbl equals, less -->
+<!ENTITY gel              "&#x022DB;" ><!--/gtreqless R: greater, equals, less -->
+<!ENTITY ges              "&#x02A7E;" ><!--/geqslant R: gt-or-equal, slanted -->
+<!ENTITY gescc            "&#x02AA9;" ><!--greater than, closed by curve, equal, slanted -->
+<!ENTITY gesdot           "&#x02A80;" ><!--greater-than-or-equal, slanted, dot inside -->
+<!ENTITY gesdoto          "&#x02A82;" ><!--greater-than-or-equal, slanted, dot above -->
+<!ENTITY gesdotol         "&#x02A84;" ><!--greater-than-or-equal, slanted, dot above left -->
+<!ENTITY gesl             "&#x022DB;&#x0FE00;" ><!--greater, equal, slanted, less -->
+<!ENTITY gesles           "&#x02A94;" ><!--greater, equal, slanted, less, equal, slanted -->
+<!ENTITY Gg               "&#x022D9;" ><!--/ggg /Gg /gggtr R: triple gtr-than -->
+<!ENTITY gl               "&#x02277;" ><!--/gtrless R: greater, less -->
+<!ENTITY gla              "&#x02AA5;" ><!--greater, less, apart -->
+<!ENTITY glE              "&#x02A92;" ><!--greater, less, equal -->
+<!ENTITY glj              "&#x02AA4;" ><!--greater, less, overlapping -->
+<!ENTITY gsim             "&#x02273;" ><!--/gtrsim R: greater, similar -->
+<!ENTITY gsime            "&#x02A8E;" ><!--greater, similar, equal -->
+<!ENTITY gsiml            "&#x02A90;" ><!--greater, similar, less -->
+<!ENTITY Gt               "&#x0226B;" ><!--/gg R: dbl greater-than sign -->
+<!ENTITY gtcc             "&#x02AA7;" ><!--greater than, closed by curve -->
+<!ENTITY gtcir            "&#x02A7A;" ><!--greater than, circle inside -->
+<!ENTITY gtdot            "&#x022D7;" ><!--/gtrdot R: greater than, with dot -->
+<!ENTITY gtquest          "&#x02A7C;" ><!--greater than, questionmark above -->
+<!ENTITY gtrarr           "&#x02978;" ><!--greater than, right arrow -->
+<!ENTITY homtht           "&#x0223B;" ><!--homothetic -->
+<!ENTITY lap              "&#x02A85;" ><!--/lessapprox R: less, approximate -->
+<!ENTITY lat              "&#x02AAB;" ><!--larger than -->
+<!ENTITY late             "&#x02AAD;" ><!--larger than or equal -->
+<!ENTITY lates            "&#x02AAD;&#x0FE00;" ><!--larger than or equal, slanted -->
+<!ENTITY lE               "&#x02266;" ><!--/leqq R: less, double equals -->
+<!ENTITY lEg              "&#x02A8B;" ><!--/lesseqqgtr R: less, dbl eq, greater -->
+<!ENTITY leg              "&#x022DA;" ><!--/lesseqgtr R: less, eq, greater -->
+<!ENTITY les              "&#x02A7D;" ><!--/leqslant R: less-than-or-eq, slant -->
+<!ENTITY lescc            "&#x02AA8;" ><!--less than, closed by curve, equal, slanted -->
+<!ENTITY lesdot           "&#x02A7F;" ><!--less-than-or-equal, slanted, dot inside -->
+<!ENTITY lesdoto          "&#x02A81;" ><!--less-than-or-equal, slanted, dot above -->
+<!ENTITY lesdotor         "&#x02A83;" ><!--less-than-or-equal, slanted, dot above right -->
+<!ENTITY lesg             "&#x022DA;&#x0FE00;" ><!--less, equal, slanted, greater -->
+<!ENTITY lesges           "&#x02A93;" ><!--less, equal, slanted, greater, equal, slanted -->
+<!ENTITY lg               "&#x02276;" ><!--/lessgtr R: less, greater -->
+<!ENTITY lgE              "&#x02A91;" ><!--less, greater, equal -->
+<!ENTITY Ll               "&#x022D8;" ><!--/Ll /lll /llless R: triple less-than -->
+<!ENTITY lsim             "&#x02272;" ><!--/lesssim R: less, similar -->
+<!ENTITY lsime            "&#x02A8D;" ><!--less, similar, equal -->
+<!ENTITY lsimg            "&#x02A8F;" ><!--less, similar, greater -->
+<!ENTITY Lt               "&#x0226A;" ><!--/ll R: double less-than sign -->
+<!ENTITY ltcc             "&#x02AA6;" ><!--less than, closed by curve -->
+<!ENTITY ltcir            "&#x02A79;" ><!--less than, circle inside -->
+<!ENTITY ltdot            "&#x022D6;" ><!--/lessdot R: less than, with dot -->
+<!ENTITY ltlarr           "&#x02976;" ><!--less than, left arrow -->
+<!ENTITY ltquest          "&#x02A7B;" ><!--less than, questionmark above -->
+<!ENTITY ltrie            "&#x022B4;" ><!--/trianglelefteq R: left triangle, eq -->
+<!ENTITY mcomma           "&#x02A29;" ><!--minus, comma above -->
+<!ENTITY mDDot            "&#x0223A;" ><!--minus with four dots, geometric properties -->
+<!ENTITY mid              "&#x02223;" ><!--/mid R: -->
+<!ENTITY mlcp             "&#x02ADB;" ><!--/mlcp -->
+<!ENTITY models           "&#x022A7;" ><!--/models R: -->
+<!ENTITY mstpos           "&#x0223E;" ><!--most positive -->
+<!ENTITY Pr               "&#x02ABB;" ><!--dbl precedes -->
+<!ENTITY pr               "&#x0227A;" ><!--/prec R: precedes -->
+<!ENTITY prap             "&#x02AB7;" ><!--/precapprox R: precedes, approximate -->
+<!ENTITY prcue            "&#x0227C;" ><!--/preccurlyeq R: precedes, curly eq -->
+<!ENTITY prE              "&#x02AB3;" ><!--precedes, dbl equals -->
+<!ENTITY pre              "&#x02AAF;" ><!--/preceq R: precedes, equals -->
+<!ENTITY prsim            "&#x0227E;" ><!--/precsim R: precedes, similar -->
+<!ENTITY prurel           "&#x022B0;" ><!--element precedes under relation -->
+<!ENTITY ratio            "&#x02236;" ><!--/ratio -->
+<!ENTITY rtrie            "&#x022B5;" ><!--/trianglerighteq R: right tri, eq -->
+<!ENTITY rtriltri         "&#x029CE;" ><!--right triangle above left triangle -->
+<!ENTITY Sc               "&#x02ABC;" ><!--dbl succeeds -->
+<!ENTITY sc               "&#x0227B;" ><!--/succ R: succeeds -->
+<!ENTITY scap             "&#x02AB8;" ><!--/succapprox R: succeeds, approximate -->
+<!ENTITY sccue            "&#x0227D;" ><!--/succcurlyeq R: succeeds, curly eq -->
+<!ENTITY scE              "&#x02AB4;" ><!--succeeds, dbl equals -->
+<!ENTITY sce              "&#x02AB0;" ><!--/succeq R: succeeds, equals -->
+<!ENTITY scsim            "&#x0227F;" ><!--/succsim R: succeeds, similar -->
+<!ENTITY sdote            "&#x02A66;" ><!--equal, dot below -->
+<!ENTITY sfrown           "&#x02322;" ><!--/smallfrown R: small down curve -->
+<!ENTITY simg             "&#x02A9E;" ><!--similar, greater -->
+<!ENTITY simgE            "&#x02AA0;" ><!--similar, greater, equal -->
+<!ENTITY siml             "&#x02A9D;" ><!--similar, less -->
+<!ENTITY simlE            "&#x02A9F;" ><!--similar, less, equal -->
+<!ENTITY smid             "&#x02223;" ><!--/shortmid R: -->
+<!ENTITY smile            "&#x02323;" ><!--/smile R: up curve -->
+<!ENTITY smt              "&#x02AAA;" ><!--smaller than -->
+<!ENTITY smte             "&#x02AAC;" ><!--smaller than or equal -->
+<!ENTITY smtes            "&#x02AAC;&#x0FE00;" ><!--smaller than or equal, slanted -->
+<!ENTITY spar             "&#x02225;" ><!--/shortparallel R: short parallel -->
+<!ENTITY sqsub            "&#x0228F;" ><!--/sqsubset R: square subset -->
+<!ENTITY sqsube           "&#x02291;" ><!--/sqsubseteq R: square subset, equals -->
+<!ENTITY sqsup            "&#x02290;" ><!--/sqsupset R: square superset -->
+<!ENTITY sqsupe           "&#x02292;" ><!--/sqsupseteq R: square superset, eq -->
+<!ENTITY ssmile           "&#x02323;" ><!--/smallsmile R: small up curve -->
+<!ENTITY Sub              "&#x022D0;" ><!--/Subset R: double subset -->
+<!ENTITY subE             "&#x02AC5;" ><!--/subseteqq R: subset, dbl equals -->
+<!ENTITY subedot          "&#x02AC3;" ><!--subset, equals, dot -->
+<!ENTITY submult          "&#x02AC1;" ><!--subset, multiply -->
+<!ENTITY subplus          "&#x02ABF;" ><!--subset, plus -->
+<!ENTITY subrarr          "&#x02979;" ><!--subset, right arrow -->
+<!ENTITY subsim           "&#x02AC7;" ><!--subset, similar -->
+<!ENTITY subsub           "&#x02AD5;" ><!--subset above subset -->
+<!ENTITY subsup           "&#x02AD3;" ><!--subset above superset -->
+<!ENTITY Sup              "&#x022D1;" ><!--/Supset R: dbl superset -->
+<!ENTITY supdsub          "&#x02AD8;" ><!--superset, subset, dash joining them -->
+<!ENTITY supE             "&#x02AC6;" ><!--/supseteqq R: superset, dbl equals -->
+<!ENTITY supedot          "&#x02AC4;" ><!--superset, equals, dot -->
+<!ENTITY suphsol          "&#x02283;&#x0002F;" ><!--superset, solidus -->
+<!ENTITY suphsub          "&#x02AD7;" ><!--superset, subset -->
+<!ENTITY suplarr          "&#x0297B;" ><!--superset, left arrow -->
+<!ENTITY supmult          "&#x02AC2;" ><!--superset, multiply -->
+<!ENTITY supplus          "&#x02AC0;" ><!--superset, plus -->
+<!ENTITY supsim           "&#x02AC8;" ><!--superset, similar -->
+<!ENTITY supsub           "&#x02AD4;" ><!--superset above subset -->
+<!ENTITY supsup           "&#x02AD6;" ><!--superset above superset -->
+<!ENTITY thkap            "&#x02248;" ><!--/thickapprox R: thick approximate -->
+<!ENTITY thksim           "&#x0223C;" ><!--/thicksim R: thick similar -->
+<!ENTITY topfork          "&#x02ADA;" ><!--fork with top -->
+<!ENTITY trie             "&#x0225C;" ><!--/triangleq R: triangle, equals -->
+<!ENTITY twixt            "&#x0226C;" ><!--/between R: between -->
+<!ENTITY Vbar             "&#x02AEB;" ><!--dbl vert, bar (under) -->
+<!ENTITY vBar             "&#x02AE8;" ><!--vert, dbl bar (under) -->
+<!ENTITY vBarv            "&#x02AE9;" ><!--dbl bar, vert over and under -->
+<!ENTITY VDash            "&#x022AB;" ><!--dbl vert, dbl dash -->
+<!ENTITY Vdash            "&#x022A9;" ><!--/Vdash R: dbl vertical, dash -->
+<!ENTITY vDash            "&#x022A8;" ><!--/vDash R: vertical, dbl dash -->
+<!ENTITY vdash            "&#x022A2;" ><!--/vdash R: vertical, dash -->
+<!ENTITY Vdashl           "&#x02AE6;" ><!--vertical, dash (long) -->
+<!ENTITY vltri            "&#x022B2;" ><!--/vartriangleleft R: l tri, open, var -->
+<!ENTITY vprop            "&#x0221D;" ><!--/varpropto R: proportional, variant -->
+<!ENTITY vrtri            "&#x022B3;" ><!--/vartriangleright R: r tri, open, var -->
+<!ENTITY Vvdash           "&#x022AA;" ><!--/Vvdash R: triple vertical, dash -->
diff --git a/dtd/isobox.ent b/dtd/isobox.ent
new file mode 100644
index 0000000..05e2b13
--- /dev/null
+++ b/dtd/isobox.ent
@@ -0,0 +1,61 @@
+
+<!--
+     File isobox.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY boxDL            "&#x02557;" ><!--lower left quadrant -->
+<!ENTITY boxDl            "&#x02556;" ><!--lower left quadrant -->
+<!ENTITY boxdL            "&#x02555;" ><!--lower left quadrant -->
+<!ENTITY boxdl            "&#x02510;" ><!--lower left quadrant -->
+<!ENTITY boxDR            "&#x02554;" ><!--lower right quadrant -->
+<!ENTITY boxDr            "&#x02553;" ><!--lower right quadrant -->
+<!ENTITY boxdR            "&#x02552;" ><!--lower right quadrant -->
+<!ENTITY boxdr            "&#x0250C;" ><!--lower right quadrant -->
+<!ENTITY boxH             "&#x02550;" ><!--horizontal line -->
+<!ENTITY boxh             "&#x02500;" ><!--horizontal line  -->
+<!ENTITY boxHD            "&#x02566;" ><!--lower left and right quadrants -->
+<!ENTITY boxHd            "&#x02564;" ><!--lower left and right quadrants -->
+<!ENTITY boxhD            "&#x02565;" ><!--lower left and right quadrants -->
+<!ENTITY boxhd            "&#x0252C;" ><!--lower left and right quadrants -->
+<!ENTITY boxHU            "&#x02569;" ><!--upper left and right quadrants -->
+<!ENTITY boxHu            "&#x02567;" ><!--upper left and right quadrants -->
+<!ENTITY boxhU            "&#x02568;" ><!--upper left and right quadrants -->
+<!ENTITY boxhu            "&#x02534;" ><!--upper left and right quadrants -->
+<!ENTITY boxUL            "&#x0255D;" ><!--upper left quadrant -->
+<!ENTITY boxUl            "&#x0255C;" ><!--upper left quadrant -->
+<!ENTITY boxuL            "&#x0255B;" ><!--upper left quadrant -->
+<!ENTITY boxul            "&#x02518;" ><!--upper left quadrant -->
+<!ENTITY boxUR            "&#x0255A;" ><!--upper right quadrant -->
+<!ENTITY boxUr            "&#x02559;" ><!--upper right quadrant -->
+<!ENTITY boxuR            "&#x02558;" ><!--upper right quadrant -->
+<!ENTITY boxur            "&#x02514;" ><!--upper right quadrant -->
+<!ENTITY boxV             "&#x02551;" ><!--vertical line -->
+<!ENTITY boxv             "&#x02502;" ><!--vertical line -->
+<!ENTITY boxVH            "&#x0256C;" ><!--all four quadrants -->
+<!ENTITY boxVh            "&#x0256B;" ><!--all four quadrants -->
+<!ENTITY boxvH            "&#x0256A;" ><!--all four quadrants -->
+<!ENTITY boxvh            "&#x0253C;" ><!--all four quadrants -->
+<!ENTITY boxVL            "&#x02563;" ><!--upper and lower left quadrants -->
+<!ENTITY boxVl            "&#x02562;" ><!--upper and lower left quadrants -->
+<!ENTITY boxvL            "&#x02561;" ><!--upper and lower left quadrants -->
+<!ENTITY boxvl            "&#x02524;" ><!--upper and lower left quadrants -->
+<!ENTITY boxVR            "&#x02560;" ><!--upper and lower right quadrants -->
+<!ENTITY boxVr            "&#x0255F;" ><!--upper and lower right quadrants -->
+<!ENTITY boxvR            "&#x0255E;" ><!--upper and lower right quadrants -->
+<!ENTITY boxvr            "&#x0251C;" ><!--upper and lower right quadrants -->
diff --git a/dtd/isocyr1.ent b/dtd/isocyr1.ent
new file mode 100644
index 0000000..b4149c7
--- /dev/null
+++ b/dtd/isocyr1.ent
@@ -0,0 +1,88 @@
+
+<!--
+     File isocyr1.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY Acy              "&#x00410;" ><!--=capital A, Cyrillic -->
+<!ENTITY acy              "&#x00430;" ><!--=small a, Cyrillic -->
+<!ENTITY Bcy              "&#x00411;" ><!--=capital BE, Cyrillic -->
+<!ENTITY bcy              "&#x00431;" ><!--=small be, Cyrillic -->
+<!ENTITY CHcy             "&#x00427;" ><!--=capital CHE, Cyrillic -->
+<!ENTITY chcy             "&#x00447;" ><!--=small che, Cyrillic -->
+<!ENTITY Dcy              "&#x00414;" ><!--=capital DE, Cyrillic -->
+<!ENTITY dcy              "&#x00434;" ><!--=small de, Cyrillic -->
+<!ENTITY Ecy              "&#x0042D;" ><!--=capital E, Cyrillic -->
+<!ENTITY ecy              "&#x0044D;" ><!--=small e, Cyrillic -->
+<!ENTITY Fcy              "&#x00424;" ><!--=capital EF, Cyrillic -->
+<!ENTITY fcy              "&#x00444;" ><!--=small ef, Cyrillic -->
+<!ENTITY Gcy              "&#x00413;" ><!--=capital GHE, Cyrillic -->
+<!ENTITY gcy              "&#x00433;" ><!--=small ghe, Cyrillic -->
+<!ENTITY HARDcy           "&#x0042A;" ><!--=capital HARD sign, Cyrillic -->
+<!ENTITY hardcy           "&#x0044A;" ><!--=small hard sign, Cyrillic -->
+<!ENTITY Icy              "&#x00418;" ><!--=capital I, Cyrillic -->
+<!ENTITY icy              "&#x00438;" ><!--=small i, Cyrillic -->
+<!ENTITY IEcy             "&#x00415;" ><!--=capital IE, Cyrillic -->
+<!ENTITY iecy             "&#x00435;" ><!--=small ie, Cyrillic -->
+<!ENTITY IOcy             "&#x00401;" ><!--=capital IO, Russian -->
+<!ENTITY iocy             "&#x00451;" ><!--=small io, Russian -->
+<!ENTITY Jcy              "&#x00419;" ><!--=capital short I, Cyrillic -->
+<!ENTITY jcy              "&#x00439;" ><!--=small short i, Cyrillic -->
+<!ENTITY Kcy              "&#x0041A;" ><!--=capital KA, Cyrillic -->
+<!ENTITY kcy              "&#x0043A;" ><!--=small ka, Cyrillic -->
+<!ENTITY KHcy             "&#x00425;" ><!--=capital HA, Cyrillic -->
+<!ENTITY khcy             "&#x00445;" ><!--=small ha, Cyrillic -->
+<!ENTITY Lcy              "&#x0041B;" ><!--=capital EL, Cyrillic -->
+<!ENTITY lcy              "&#x0043B;" ><!--=small el, Cyrillic -->
+<!ENTITY Mcy              "&#x0041C;" ><!--=capital EM, Cyrillic -->
+<!ENTITY mcy              "&#x0043C;" ><!--=small em, Cyrillic -->
+<!ENTITY Ncy              "&#x0041D;" ><!--=capital EN, Cyrillic -->
+<!ENTITY ncy              "&#x0043D;" ><!--=small en, Cyrillic -->
+<!ENTITY numero           "&#x02116;" ><!--=numero sign -->
+<!ENTITY Ocy              "&#x0041E;" ><!--=capital O, Cyrillic -->
+<!ENTITY ocy              "&#x0043E;" ><!--=small o, Cyrillic -->
+<!ENTITY Pcy              "&#x0041F;" ><!--=capital PE, Cyrillic -->
+<!ENTITY pcy              "&#x0043F;" ><!--=small pe, Cyrillic -->
+<!ENTITY Rcy              "&#x00420;" ><!--=capital ER, Cyrillic -->
+<!ENTITY rcy              "&#x00440;" ><!--=small er, Cyrillic -->
+<!ENTITY Scy              "&#x00421;" ><!--=capital ES, Cyrillic -->
+<!ENTITY scy              "&#x00441;" ><!--=small es, Cyrillic -->
+<!ENTITY SHCHcy           "&#x00429;" ><!--=capital SHCHA, Cyrillic -->
+<!ENTITY shchcy           "&#x00449;" ><!--=small shcha, Cyrillic -->
+<!ENTITY SHcy             "&#x00428;" ><!--=capital SHA, Cyrillic -->
+<!ENTITY shcy             "&#x00448;" ><!--=small sha, Cyrillic -->
+<!ENTITY SOFTcy           "&#x0042C;" ><!--=capital SOFT sign, Cyrillic -->
+<!ENTITY softcy           "&#x0044C;" ><!--=small soft sign, Cyrillic -->
+<!ENTITY Tcy              "&#x00422;" ><!--=capital TE, Cyrillic -->
+<!ENTITY tcy              "&#x00442;" ><!--=small te, Cyrillic -->
+<!ENTITY TScy             "&#x00426;" ><!--=capital TSE, Cyrillic -->
+<!ENTITY tscy             "&#x00446;" ><!--=small tse, Cyrillic -->
+<!ENTITY Ucy              "&#x00423;" ><!--=capital U, Cyrillic -->
+<!ENTITY ucy              "&#x00443;" ><!--=small u, Cyrillic -->
+<!ENTITY Vcy              "&#x00412;" ><!--=capital VE, Cyrillic -->
+<!ENTITY vcy              "&#x00432;" ><!--=small ve, Cyrillic -->
+<!ENTITY YAcy             "&#x0042F;" ><!--=capital YA, Cyrillic -->
+<!ENTITY yacy             "&#x0044F;" ><!--=small ya, Cyrillic -->
+<!ENTITY Ycy              "&#x0042B;" ><!--=capital YERU, Cyrillic -->
+<!ENTITY ycy              "&#x0044B;" ><!--=small yeru, Cyrillic -->
+<!ENTITY YUcy             "&#x0042E;" ><!--=capital YU, Cyrillic -->
+<!ENTITY yucy             "&#x0044E;" ><!--=small yu, Cyrillic -->
+<!ENTITY Zcy              "&#x00417;" ><!--=capital ZE, Cyrillic -->
+<!ENTITY zcy              "&#x00437;" ><!--=small ze, Cyrillic -->
+<!ENTITY ZHcy             "&#x00416;" ><!--=capital ZHE, Cyrillic -->
+<!ENTITY zhcy             "&#x00436;" ><!--=small zhe, Cyrillic -->
diff --git a/dtd/isocyr2.ent b/dtd/isocyr2.ent
new file mode 100644
index 0000000..b038bd9
--- /dev/null
+++ b/dtd/isocyr2.ent
@@ -0,0 +1,47 @@
+
+<!--
+     File isocyr2.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY DJcy             "&#x00402;" ><!--=capital DJE, Serbian -->
+<!ENTITY djcy             "&#x00452;" ><!--=small dje, Serbian -->
+<!ENTITY DScy             "&#x00405;" ><!--=capital DSE, Macedonian -->
+<!ENTITY dscy             "&#x00455;" ><!--=small dse, Macedonian -->
+<!ENTITY DZcy             "&#x0040F;" ><!--=capital dze, Serbian -->
+<!ENTITY dzcy             "&#x0045F;" ><!--=small dze, Serbian -->
+<!ENTITY GJcy             "&#x00403;" ><!--=capital GJE Macedonian -->
+<!ENTITY gjcy             "&#x00453;" ><!--=small gje, Macedonian -->
+<!ENTITY Iukcy            "&#x00406;" ><!--=capital I, Ukrainian -->
+<!ENTITY iukcy            "&#x00456;" ><!--=small i, Ukrainian -->
+<!ENTITY Jsercy           "&#x00408;" ><!--=capital JE, Serbian -->
+<!ENTITY jsercy           "&#x00458;" ><!--=small je, Serbian -->
+<!ENTITY Jukcy            "&#x00404;" ><!--=capital JE, Ukrainian -->
+<!ENTITY jukcy            "&#x00454;" ><!--=small je, Ukrainian -->
+<!ENTITY KJcy             "&#x0040C;" ><!--=capital KJE, Macedonian -->
+<!ENTITY kjcy             "&#x0045C;" ><!--=small kje Macedonian -->
+<!ENTITY LJcy             "&#x00409;" ><!--=capital LJE, Serbian -->
+<!ENTITY ljcy             "&#x00459;" ><!--=small lje, Serbian -->
+<!ENTITY NJcy             "&#x0040A;" ><!--=capital NJE, Serbian -->
+<!ENTITY njcy             "&#x0045A;" ><!--=small nje, Serbian -->
+<!ENTITY TSHcy            "&#x0040B;" ><!--=capital TSHE, Serbian -->
+<!ENTITY tshcy            "&#x0045B;" ><!--=small tshe, Serbian -->
+<!ENTITY Ubrcy            "&#x0040E;" ><!--=capital U, Byelorussian -->
+<!ENTITY ubrcy            "&#x0045E;" ><!--=small u, Byelorussian -->
+<!ENTITY YIcy             "&#x00407;" ><!--=capital YI, Ukrainian -->
+<!ENTITY yicy             "&#x00457;" ><!--=small yi, Ukrainian -->
diff --git a/dtd/isodia.ent b/dtd/isodia.ent
new file mode 100644
index 0000000..39ccfcd
--- /dev/null
+++ b/dtd/isodia.ent
@@ -0,0 +1,35 @@
+
+<!--
+     File isodia.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY acute            "&#x000B4;" ><!--=acute accent -->
+<!ENTITY breve            "&#x002D8;" ><!--=breve -->
+<!ENTITY caron            "&#x002C7;" ><!--=caron -->
+<!ENTITY cedil            "&#x000B8;" ><!--=cedilla -->
+<!ENTITY circ             "&#x002C6;" ><!--circumflex accent -->
+<!ENTITY dblac            "&#x002DD;" ><!--=double acute accent -->
+<!ENTITY die              "&#x000A8;" ><!--=dieresis -->
+<!ENTITY dot              "&#x002D9;" ><!--=dot above -->
+<!ENTITY grave            "&#x00060;" ><!--=grave accent -->
+<!ENTITY macr             "&#x000AF;" ><!--=macron -->
+<!ENTITY ogon             "&#x002DB;" ><!--=ogonek -->
+<!ENTITY ring             "&#x002DA;" ><!--=ring -->
+<!ENTITY tilde            "&#x002DC;" ><!--=tilde -->
+<!ENTITY uml              "&#x000A8;" ><!--=umlaut mark -->
diff --git a/dtd/isogrk1.ent b/dtd/isogrk1.ent
new file mode 100644
index 0000000..a5f52ef
--- /dev/null
+++ b/dtd/isogrk1.ent
@@ -0,0 +1 @@
+<!-- 

     File isogrk1.ent produced by the dsssl script ent.dsl
     from input data in unicode.xml.

     Please report any errors to 
     David Carlisle <davidc@nag.co.uk>.

     The numeric character values assigned to each entity
     (should) match either official Unicode assignments
     or assignments in the STIX proposal for characters
     for Mathematics.

     The STIX assignments are temporary and will change if
     the proposal or some variant of it is adopted by the
     Unicode Consortium.

     Entity names in this file are derived from files carrying the
     following notice:

     (C) International Organization for Standardization 1986
     Permission to copy in any form is granted for use with
     conforming SGML systems and applications as defined in
     ISO 8879, provided this notice is included in all copies.
-->
<!ENTITY agr        "&#945;"   ><!--U03B1 =small alpha, Greek -->
<!ENTITY Agr        "&#913;"   ><!--U0391 =capital Alpha, Greek -->
<!ENTITY bgr        "&#946;"   ><!--U03B2 =small beta, Greek -->
<!ENTITY Bgr        "&#914;"   ><!--U0392 =capital Beta, Greek -->
<!ENTITY dgr        "&#948;"   ><!--U03B4 =small delta, Greek -->
<!ENTITY Dgr        "&#916;"   ><!--U0394 =capital Delta, Greek -->
<!ENTITY eegr       "&#951;"   ><!--U03B7 =small eta, Greek -->
<!ENTITY egr        "&#949;"   ><!--U03B5 =small epsilon, Greek -->
<!ENTITY EEgr       "&#919;"   ><!--U0397 =capital Eta, Greek -->
<!ENTITY Egr        "&#917;"   ><!--U0395 =capital Epsilon, Greek -->
<!ENTITY ggr        "&#947;"   ><!--U03B3 =small gamma, Greek -->
<!ENTITY Ggr        "&#915;"   ><!--U0393 =capital Gamma, Greek -->
<!ENTITY igr        "&#953;"   ><!--U03B9 =small iota, Greek -->
<!ENTITY Igr        "&#921;"   ><!--U0399 =capital Iota, Greek -->
<!ENTITY kgr        "&#954;"   ><!--U03BA =small kappa, Greek -->
<!ENTITY khgr       "&#967;"   ><!--U03C7 =small chi, Greek -->
<!ENTITY Kgr        "&#922;"   ><!--U039A =capital Kappa, Greek -->
<!ENTITY KHgr       "&#935;"   ><!--U03A7 =capital Chi, Greek -->
<!ENTITY lgr        "&#955;"   ><!--U03BB =small lambda, Greek -->
<!ENTITY Lgr        "&#923;"   ><!--U039B =capital Lambda, Greek -->
<!ENTITY mgr        "&#956;"   ><!--U03BC =small mu, Greek -->
<!ENTITY Mgr        "&#924;"   ><!--U039C =capital Mu, Greek -->
<!ENTITY ngr        "&#957;"   ><!--U03BD =small nu, Greek -->
<!ENTITY Ngr        "&#925;"   ><!--U039D =capital Nu, Greek -->
<!ENTITY ogr        "&#959;"   ><!--U03BF =small omicron, Greek -->
<!ENTITY ohgr       "&#969;"   ><!--U03C9 =small omega, Greek -->
<!ENTITY Ogr        "&#927;"   ><!--U039F =capital Omicron, Greek -->
<!ENTITY OHgr       "&#937;"   ><!--U03A9 =capital Omega, Greek -->
<!ENTITY pgr        "&#960;"   ><!--U03C0 =small pi, Greek -->
<!ENTITY phgr       "&#966;"   ><!--U03C6 =small phi, Greek -->
<!ENTITY psgr       "&#968;"   ><!--U03C8 =small psi, Greek -->
<!ENTITY Pgr        "&#928;"   ><!--U03A0 =capital Pi, Greek -->
<!ENTITY PHgr       "&#934;"   ><!--U03A6 =capital Phi, Greek -->
<!ENTITY PSgr       "&#936;"   ><!--U03A8 =capital Psi, Greek -->
<!ENTITY rgr        "&#961;"   ><!--U03C1 =small rho, Greek -->
<!ENTITY Rgr        "&#929;"   ><!--U03A1 =capital Rho, Greek -->
<!ENTITY sfgr       "&#962;"   ><!--U03C2 =final small sigma, Greek -->
<!ENTITY sgr        "&#963;"   ><!--U03C3 =small sigma, Greek -->
<!ENTITY Sgr        "&#931;"   ><!--U03A3 =capital Sigma, Greek -->
<!ENTITY tgr        "&#964;"   ><!--U03C4 =small tau, Greek -->
<!ENTITY thgr       "&#952;"   ><!--U03B8 =small theta, Greek -->
<!ENTITY Tgr        "&#932;"   ><!--U03A4 =capital Tau, Greek -->
<!ENTITY THgr       "&#920;"   ><!--U0398 =capital Theta, Greek -->
<!ENTITY ugr        "&#965;"   ><!--U03C5 =small upsilon, Greek -->
<!ENTITY Ugr        "&#933;"   ><!--U03A5 =capital Upsilon, Greek -->
<!ENTITY xgr        "&#958;"   ><!--U03BE =small xi, Greek -->
<!ENTITY Xgr        "&#926;"   ><!--U039E =capital Xi, Greek -->
<!ENTITY zgr        "&#950;"   ><!--U03B6 =small zeta, Greek -->
<!ENTITY Zgr        "&#918;"   ><!--U0396 =capital Zeta, Greek -->
\ No newline at end of file
diff --git a/dtd/isogrk2.ent b/dtd/isogrk2.ent
new file mode 100644
index 0000000..d27cc30
--- /dev/null
+++ b/dtd/isogrk2.ent
@@ -0,0 +1 @@
+<!-- 

     File isogrk2.ent produced by the dsssl script ent.dsl
     from input data in unicode.xml.

     Please report any errors to 
     David Carlisle <davidc@nag.co.uk>.

     The numeric character values assigned to each entity
     (should) match either official Unicode assignments
     or assignments in the STIX proposal for characters
     for Mathematics.

     The STIX assignments are temporary and will change if
     the proposal or some variant of it is adopted by the
     Unicode Consortium.

     Entity names in this file are derived from files carrying the
     following notice:

     (C) International Organization for Standardization 1986
     Permission to copy in any form is granted for use with
     conforming SGML systems and applications as defined in
     ISO 8879, provided this notice is included in all copies.
-->
<!ENTITY aacgr      "&#940;"   ><!--U03AC =small alpha, accent, Greek -->
<!ENTITY Aacgr      "&#902;"   ><!--U0386 =capital Alpha, accent, Greek -->
<!ENTITY eacgr      "&#941;"   ><!--U03AD =small epsilon, accent, Greek -->
<!ENTITY eeacgr     "&#942;"   ><!--U03AE =small eta, accent, Greek -->
<!ENTITY Eacgr      "&#904;"   ><!--U0388 =capital Epsilon, accent, Greek -->
<!ENTITY EEacgr     "&#905;"   ><!--U0389 =capital Eta, accent, Greek -->
<!ENTITY iacgr      "&#943;"   ><!--U03AF =small iota, accent, Greek -->
<!ENTITY idiagr     "&#912;"   ><!--U0390 =small iota, dieresis, accent, Greek -->
<!ENTITY idigr      "&#970;"   ><!--U03CA =small iota, dieresis, Greek -->
<!ENTITY Iacgr      "&#906;"   ><!--U038A =capital Iota, accent, Greek -->
<!ENTITY Idigr      "&#938;"   ><!--U03AA =capital Iota, dieresis, Greek -->
<!ENTITY oacgr      "&#972;"   ><!--U03CC =small omicron, accent, Greek -->
<!ENTITY ohacgr     "&#974;"   ><!--U03CE =small omega, accent, Greek -->
<!ENTITY Oacgr      "&#908;"   ><!--U038C =capital Omicron, accent, Greek -->
<!ENTITY OHacgr     "&#911;"   ><!--U038F =capital Omega, accent, Greek -->
<!ENTITY uacgr      "&#973;"   ><!--U03CD =small upsilon, accent, Greek -->
<!ENTITY udiagr     "&#944;"   ><!--U03B0 =small upsilon, dieresis, accent, Greek -->
<!ENTITY udigr      "&#971;"   ><!--U03CB =small upsilon, dieresis, Greek -->
<!ENTITY Uacgr      "&#910;"   ><!--U038E =capital Upsilon, accent, Greek -->
<!ENTITY Udigr      "&#939;"   ><!--U03AB =capital Upsilon, dieresis, Greek -->
\ No newline at end of file
diff --git a/dtd/isogrk3.ent b/dtd/isogrk3.ent
new file mode 100644
index 0000000..0cbde88
--- /dev/null
+++ b/dtd/isogrk3.ent
@@ -0,0 +1,64 @@
+
+<!--
+     File isogrk3.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY alpha            "&#x003B1;" ><!--/alpha small alpha, Greek -->
+<!ENTITY beta             "&#x003B2;" ><!--/beta small beta, Greek -->
+<!ENTITY chi              "&#x003C7;" ><!--/chi small chi, Greek -->
+<!ENTITY Delta            "&#x00394;" ><!--/Delta capital Delta, Greek -->
+<!ENTITY delta            "&#x003B4;" ><!--/delta small delta, Greek -->
+<!ENTITY epsi             "&#x003F5;" ><!--/straightepsilon, small epsilon, Greek -->
+<!ENTITY epsiv            "&#x003B5;" ><!--/varepsilon -->
+<!ENTITY eta              "&#x003B7;" ><!--/eta small eta, Greek -->
+<!ENTITY Gamma            "&#x00393;" ><!--/Gamma capital Gamma, Greek -->
+<!ENTITY gamma            "&#x003B3;" ><!--/gamma small gamma, Greek -->
+<!ENTITY Gammad           "&#x003DC;" ><!--capital digamma -->
+<!ENTITY gammad           "&#x003DD;" ><!--/digamma -->
+<!ENTITY iota             "&#x003B9;" ><!--/iota small iota, Greek -->
+<!ENTITY kappa            "&#x003BA;" ><!--/kappa small kappa, Greek -->
+<!ENTITY kappav           "&#x003F0;" ><!--/varkappa -->
+<!ENTITY Lambda           "&#x0039B;" ><!--/Lambda capital Lambda, Greek -->
+<!ENTITY lambda           "&#x003BB;" ><!--/lambda small lambda, Greek -->
+<!ENTITY mu               "&#x003BC;" ><!--/mu small mu, Greek -->
+<!ENTITY nu               "&#x003BD;" ><!--/nu small nu, Greek -->
+<!ENTITY Omega            "&#x003A9;" ><!--/Omega capital Omega, Greek -->
+<!ENTITY omega            "&#x003C9;" ><!--/omega small omega, Greek -->
+<!ENTITY Phi              "&#x003A6;" ><!--/Phi capital Phi, Greek -->
+<!ENTITY phi              "&#x003D5;" ><!--/straightphi - small phi, Greek -->
+<!ENTITY phiv             "&#x003C6;" ><!--/varphi - curly or open phi -->
+<!ENTITY Pi               "&#x003A0;" ><!--/Pi capital Pi, Greek -->
+<!ENTITY pi               "&#x003C0;" ><!--/pi small pi, Greek -->
+<!ENTITY piv              "&#x003D6;" ><!--/varpi -->
+<!ENTITY Psi              "&#x003A8;" ><!--/Psi capital Psi, Greek -->
+<!ENTITY psi              "&#x003C8;" ><!--/psi small psi, Greek -->
+<!ENTITY rho              "&#x003C1;" ><!--/rho small rho, Greek -->
+<!ENTITY rhov             "&#x003F1;" ><!--/varrho -->
+<!ENTITY Sigma            "&#x003A3;" ><!--/Sigma capital Sigma, Greek -->
+<!ENTITY sigma            "&#x003C3;" ><!--/sigma small sigma, Greek -->
+<!ENTITY sigmav           "&#x003C2;" ><!--/varsigma -->
+<!ENTITY tau              "&#x003C4;" ><!--/tau small tau, Greek -->
+<!ENTITY Theta            "&#x00398;" ><!--/Theta capital Theta, Greek -->
+<!ENTITY theta            "&#x003B8;" ><!--/theta straight theta, small theta, Greek -->
+<!ENTITY thetav           "&#x003D1;" ><!--/vartheta - curly or open theta -->
+<!ENTITY Upsi             "&#x003D2;" ><!--/Upsilon capital Upsilon, Greek -->
+<!ENTITY upsi             "&#x003C5;" ><!--/upsilon small upsilon, Greek -->
+<!ENTITY Xi               "&#x0039E;" ><!--/Xi capital Xi, Greek -->
+<!ENTITY xi               "&#x003BE;" ><!--/xi small xi, Greek -->
+<!ENTITY zeta             "&#x003B6;" ><!--/zeta small zeta, Greek -->
diff --git a/dtd/isogrk4.ent b/dtd/isogrk4.ent
new file mode 100644
index 0000000..07c4d06
--- /dev/null
+++ b/dtd/isogrk4.ent
@@ -0,0 +1,69 @@
+<!-- 
+
+     File isogrk4.ent produced by the dsssl script ent.dsl
+     from input data in unicode.xml.
+
+     Please report any errors to 
+     David Carlisle <davidc@nag.co.uk>.
+
+     The numeric character values assigned to each entity
+     (should) match either official Unicode assignments
+     or assignments in the STIX proposal for characters
+     for Mathematics.
+
+     The STIX assignments are temporary and will change if
+     the proposal or some variant of it is adopted by the
+     Unicode Consortium.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+-->
+<!ENTITY b.alpha    "&#59136;" ><!--UE700 small alpha, Greek -->
+<!ENTITY b.beta     "&#59137;" ><!--UE701 small beta, Greek -->
+<!ENTITY b.chi      "&#59175;" ><!--UE727 small chi, Greek -->
+<!ENTITY b.delta    "&#59142;" ><!--UE706 small delta, Greek -->
+<!ENTITY b.Delta    "&#59143;" ><!--UE707 capital delta, Greek -->
+<!ENTITY b.epsi     "&#59144;" ><!--UE708 small epsilon, Greek -->
+<!ENTITY b.epsiv    "&#59146;" ><!--UE709 varepsilion -->
+<!ENTITY b.eta      "&#59148;" ><!--UE70C small eta, Greek -->
+<!ENTITY b.gamma    "&#59138;" ><!--UE702 small gamma, Greek -->
+<!ENTITY b.gammad   "&#59140;" ><!--UE704 digamma, Greek -->
+<!ENTITY b.Gamma    "&#59139;" ><!--UE703 capital gamma, Greek -->
+<!ENTITY b.Gammad   "&#59141;" ><!--UE705 capital digamma, Greek -->
+<!ENTITY b.iota     "&#59152;" ><!--UE710 small iota, Greek -->
+<!ENTITY b.kappa    "&#59153;" ><!--UE711 small kappa, Greek -->
+<!ENTITY b.kappav   "&#59154;" ><!--UE712 var kappa, Greek -->
+<!ENTITY b.lambda   "&#59155;" ><!--UE713 small lambda, Greek -->
+<!ENTITY b.Lambda   "&#59156;" ><!--UE714 capital lambda, Greek -->
+<!ENTITY b.mu       "&#59157;" ><!--UE715 small mu, Greek -->
+<!ENTITY b.nu       "&#59158;" ><!--UE716 small nu, Greek -->
+<!ENTITY b.omega    "&#59178;" ><!--UE72A small omega, Greek -->
+<!ENTITY b.Omega    "&#59179;" ><!--UE72B capital Omega, Greek -->
+<!ENTITY b.phis     "&#59172;" ><!--UE724 straight phi, Greek -->
+<!ENTITY b.phiv     "&#59174;" ><!--UE726 varphi -->
+<!ENTITY b.pi       "&#59161;" ><!--UE719 small pi, Greek -->
+<!ENTITY b.piv      "&#59163;" ><!--UE71B varpi -->
+<!ENTITY b.psi      "&#59176;" ><!--UE728 small psi, Greek -->
+<!ENTITY b.Phi      "&#59173;" ><!--UE725 capital Phi, Greek -->
+<!ENTITY b.Pi       "&#59162;" ><!--UE71A capital pi, Greek -->
+<!ENTITY b.Psi      "&#59177;" ><!--UE729 capital Psi, Greek -->
+<!ENTITY b.rho      "&#59164;" ><!--UE71C small rho, Greek -->
+<!ENTITY b.rhov     "&#59165;" ><!--UE71D varrho -->
+<!ENTITY b.sigma    "&#59166;" ><!--UE71E small sigma, Greek -->
+<!ENTITY b.sigmav   "&#59168;" ><!--UE720 varsigma -->
+<!ENTITY b.Sigma    "&#59167;" ><!--UE71F capital sigma, Greek -->
+<!ENTITY b.tau      "&#59169;" ><!--UE721 small tau, Greek -->
+<!ENTITY b.thetas   "&#59149;" ><!--UE70D straight theta, Greek -->
+<!ENTITY b.thetav   "&#59151;" ><!--UE70F var theta, Greek -->
+<!ENTITY b.Theta    "&#59150;" ><!--UE70E capital theta, Greek -->
+<!ENTITY b.upsi     "&#59170;" ><!--UE722 small upsilon, Greek -->
+<!ENTITY b.Upsilon  "&#59171;" ><!--UE723 capital upsilon, Greek -->
+<!ENTITY b.xi       "&#59159;" ><!--UE717 small xi, Greek -->
+<!ENTITY b.Xi       "&#59160;" ><!--UE718 capital xi, Greek -->
+<!ENTITY b.zeta     "&#59145;" ><!--UE70B small zeta, Greek -->
+
diff --git a/dtd/isolat1.ent b/dtd/isolat1.ent
new file mode 100644
index 0000000..43ae764
--- /dev/null
+++ b/dtd/isolat1.ent
@@ -0,0 +1,83 @@
+
+<!--
+     File isolat1.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY Aacute           "&#x000C1;" ><!--=capital A, acute accent -->
+<!ENTITY aacute           "&#x000E1;" ><!--=small a, acute accent -->
+<!ENTITY Acirc            "&#x000C2;" ><!--=capital A, circumflex accent -->
+<!ENTITY acirc            "&#x000E2;" ><!--=small a, circumflex accent -->
+<!ENTITY AElig            "&#x000C6;" ><!--=capital AE diphthong (ligature) -->
+<!ENTITY aelig            "&#x000E6;" ><!--=small ae diphthong (ligature) -->
+<!ENTITY Agrave           "&#x000C0;" ><!--=capital A, grave accent -->
+<!ENTITY agrave           "&#x000E0;" ><!--=small a, grave accent -->
+<!ENTITY Aring            "&#x000C5;" ><!--=capital A, ring -->
+<!ENTITY aring            "&#x000E5;" ><!--=small a, ring -->
+<!ENTITY Atilde           "&#x000C3;" ><!--=capital A, tilde -->
+<!ENTITY atilde           "&#x000E3;" ><!--=small a, tilde -->
+<!ENTITY Auml             "&#x000C4;" ><!--=capital A, dieresis or umlaut mark -->
+<!ENTITY auml             "&#x000E4;" ><!--=small a, dieresis or umlaut mark -->
+<!ENTITY Ccedil           "&#x000C7;" ><!--=capital C, cedilla -->
+<!ENTITY ccedil           "&#x000E7;" ><!--=small c, cedilla -->
+<!ENTITY Eacute           "&#x000C9;" ><!--=capital E, acute accent -->
+<!ENTITY eacute           "&#x000E9;" ><!--=small e, acute accent -->
+<!ENTITY Ecirc            "&#x000CA;" ><!--=capital E, circumflex accent -->
+<!ENTITY ecirc            "&#x000EA;" ><!--=small e, circumflex accent -->
+<!ENTITY Egrave           "&#x000C8;" ><!--=capital E, grave accent -->
+<!ENTITY egrave           "&#x000E8;" ><!--=small e, grave accent -->
+<!ENTITY ETH              "&#x000D0;" ><!--=capital Eth, Icelandic -->
+<!ENTITY eth              "&#x000F0;" ><!--=small eth, Icelandic -->
+<!ENTITY Euml             "&#x000CB;" ><!--=capital E, dieresis or umlaut mark -->
+<!ENTITY euml             "&#x000EB;" ><!--=small e, dieresis or umlaut mark -->
+<!ENTITY Iacute           "&#x000CD;" ><!--=capital I, acute accent -->
+<!ENTITY iacute           "&#x000ED;" ><!--=small i, acute accent -->
+<!ENTITY Icirc            "&#x000CE;" ><!--=capital I, circumflex accent -->
+<!ENTITY icirc            "&#x000EE;" ><!--=small i, circumflex accent -->
+<!ENTITY Igrave           "&#x000CC;" ><!--=capital I, grave accent -->
+<!ENTITY igrave           "&#x000EC;" ><!--=small i, grave accent -->
+<!ENTITY Iuml             "&#x000CF;" ><!--=capital I, dieresis or umlaut mark -->
+<!ENTITY iuml             "&#x000EF;" ><!--=small i, dieresis or umlaut mark -->
+<!ENTITY Ntilde           "&#x000D1;" ><!--=capital N, tilde -->
+<!ENTITY ntilde           "&#x000F1;" ><!--=small n, tilde -->
+<!ENTITY Oacute           "&#x000D3;" ><!--=capital O, acute accent -->
+<!ENTITY oacute           "&#x000F3;" ><!--=small o, acute accent -->
+<!ENTITY Ocirc            "&#x000D4;" ><!--=capital O, circumflex accent -->
+<!ENTITY ocirc            "&#x000F4;" ><!--=small o, circumflex accent -->
+<!ENTITY Ograve           "&#x000D2;" ><!--=capital O, grave accent -->
+<!ENTITY ograve           "&#x000F2;" ><!--=small o, grave accent -->
+<!ENTITY Oslash           "&#x000D8;" ><!--=capital O, slash -->
+<!ENTITY oslash           "&#x000F8;" ><!--latin small letter o with stroke -->
+<!ENTITY Otilde           "&#x000D5;" ><!--=capital O, tilde -->
+<!ENTITY otilde           "&#x000F5;" ><!--=small o, tilde -->
+<!ENTITY Ouml             "&#x000D6;" ><!--=capital O, dieresis or umlaut mark -->
+<!ENTITY ouml             "&#x000F6;" ><!--=small o, dieresis or umlaut mark -->
+<!ENTITY szlig            "&#x000DF;" ><!--=small sharp s, German (sz ligature) -->
+<!ENTITY THORN            "&#x000DE;" ><!--=capital THORN, Icelandic -->
+<!ENTITY thorn            "&#x000FE;" ><!--=small thorn, Icelandic -->
+<!ENTITY Uacute           "&#x000DA;" ><!--=capital U, acute accent -->
+<!ENTITY uacute           "&#x000FA;" ><!--=small u, acute accent -->
+<!ENTITY Ucirc            "&#x000DB;" ><!--=capital U, circumflex accent -->
+<!ENTITY ucirc            "&#x000FB;" ><!--=small u, circumflex accent -->
+<!ENTITY Ugrave           "&#x000D9;" ><!--=capital U, grave accent -->
+<!ENTITY ugrave           "&#x000F9;" ><!--=small u, grave accent -->
+<!ENTITY Uuml             "&#x000DC;" ><!--=capital U, dieresis or umlaut mark -->
+<!ENTITY uuml             "&#x000FC;" ><!--=small u, dieresis or umlaut mark -->
+<!ENTITY Yacute           "&#x000DD;" ><!--=capital Y, acute accent -->
+<!ENTITY yacute           "&#x000FD;" ><!--=small y, acute accent -->
+<!ENTITY yuml             "&#x000FF;" ><!--=small y, dieresis or umlaut mark -->
diff --git a/dtd/isolat2.ent b/dtd/isolat2.ent
new file mode 100644
index 0000000..c29b828
--- /dev/null
+++ b/dtd/isolat2.ent
@@ -0,0 +1,142 @@
+
+<!--
+     File isolat2.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY Abreve           "&#x00102;" ><!--=capital A, breve -->
+<!ENTITY abreve           "&#x00103;" ><!--=small a, breve -->
+<!ENTITY Amacr            "&#x00100;" ><!--=capital A, macron -->
+<!ENTITY amacr            "&#x00101;" ><!--=small a, macron -->
+<!ENTITY Aogon            "&#x00104;" ><!--=capital A, ogonek -->
+<!ENTITY aogon            "&#x00105;" ><!--=small a, ogonek -->
+<!ENTITY Cacute           "&#x00106;" ><!--=capital C, acute accent -->
+<!ENTITY cacute           "&#x00107;" ><!--=small c, acute accent -->
+<!ENTITY Ccaron           "&#x0010C;" ><!--=capital C, caron -->
+<!ENTITY ccaron           "&#x0010D;" ><!--=small c, caron -->
+<!ENTITY Ccirc            "&#x00108;" ><!--=capital C, circumflex accent -->
+<!ENTITY ccirc            "&#x00109;" ><!--=small c, circumflex accent -->
+<!ENTITY Cdot             "&#x0010A;" ><!--=capital C, dot above -->
+<!ENTITY cdot             "&#x0010B;" ><!--=small c, dot above -->
+<!ENTITY Dcaron           "&#x0010E;" ><!--=capital D, caron -->
+<!ENTITY dcaron           "&#x0010F;" ><!--=small d, caron -->
+<!ENTITY Dstrok           "&#x00110;" ><!--=capital D, stroke -->
+<!ENTITY dstrok           "&#x00111;" ><!--=small d, stroke -->
+<!ENTITY Ecaron           "&#x0011A;" ><!--=capital E, caron -->
+<!ENTITY ecaron           "&#x0011B;" ><!--=small e, caron -->
+<!ENTITY Edot             "&#x00116;" ><!--=capital E, dot above -->
+<!ENTITY edot             "&#x00117;" ><!--=small e, dot above -->
+<!ENTITY Emacr            "&#x00112;" ><!--=capital E, macron -->
+<!ENTITY emacr            "&#x00113;" ><!--=small e, macron -->
+<!ENTITY ENG              "&#x0014A;" ><!--=capital ENG, Lapp -->
+<!ENTITY eng              "&#x0014B;" ><!--=small eng, Lapp -->
+<!ENTITY Eogon            "&#x00118;" ><!--=capital E, ogonek -->
+<!ENTITY eogon            "&#x00119;" ><!--=small e, ogonek -->
+<!ENTITY gacute           "&#x001F5;" ><!--=small g, acute accent -->
+<!ENTITY Gbreve           "&#x0011E;" ><!--=capital G, breve -->
+<!ENTITY gbreve           "&#x0011F;" ><!--=small g, breve -->
+<!ENTITY Gcedil           "&#x00122;" ><!--=capital G, cedilla -->
+<!ENTITY Gcirc            "&#x0011C;" ><!--=capital G, circumflex accent -->
+<!ENTITY gcirc            "&#x0011D;" ><!--=small g, circumflex accent -->
+<!ENTITY Gdot             "&#x00120;" ><!--=capital G, dot above -->
+<!ENTITY gdot             "&#x00121;" ><!--=small g, dot above -->
+<!ENTITY Hcirc            "&#x00124;" ><!--=capital H, circumflex accent -->
+<!ENTITY hcirc            "&#x00125;" ><!--=small h, circumflex accent -->
+<!ENTITY Hstrok           "&#x00126;" ><!--=capital H, stroke -->
+<!ENTITY hstrok           "&#x00127;" ><!--=small h, stroke -->
+<!ENTITY Idot             "&#x00130;" ><!--=capital I, dot above -->
+<!ENTITY IJlig            "&#x00132;" ><!--=capital IJ ligature -->
+<!ENTITY ijlig            "&#x00133;" ><!--=small ij ligature -->
+<!ENTITY Imacr            "&#x0012A;" ><!--=capital I, macron -->
+<!ENTITY imacr            "&#x0012B;" ><!--=small i, macron -->
+<!ENTITY inodot           "&#x00131;" ><!--=small i without dot -->
+<!ENTITY Iogon            "&#x0012E;" ><!--=capital I, ogonek -->
+<!ENTITY iogon            "&#x0012F;" ><!--=small i, ogonek -->
+<!ENTITY Itilde           "&#x00128;" ><!--=capital I, tilde -->
+<!ENTITY itilde           "&#x00129;" ><!--=small i, tilde -->
+<!ENTITY Jcirc            "&#x00134;" ><!--=capital J, circumflex accent -->
+<!ENTITY jcirc            "&#x00135;" ><!--=small j, circumflex accent -->
+<!ENTITY Kcedil           "&#x00136;" ><!--=capital K, cedilla -->
+<!ENTITY kcedil           "&#x00137;" ><!--=small k, cedilla -->
+<!ENTITY kgreen           "&#x00138;" ><!--=small k, Greenlandic -->
+<!ENTITY Lacute           "&#x00139;" ><!--=capital L, acute accent -->
+<!ENTITY lacute           "&#x0013A;" ><!--=small l, acute accent -->
+<!ENTITY Lcaron           "&#x0013D;" ><!--=capital L, caron -->
+<!ENTITY lcaron           "&#x0013E;" ><!--=small l, caron -->
+<!ENTITY Lcedil           "&#x0013B;" ><!--=capital L, cedilla -->
+<!ENTITY lcedil           "&#x0013C;" ><!--=small l, cedilla -->
+<!ENTITY Lmidot           "&#x0013F;" ><!--=capital L, middle dot -->
+<!ENTITY lmidot           "&#x00140;" ><!--=small l, middle dot -->
+<!ENTITY Lstrok           "&#x00141;" ><!--=capital L, stroke -->
+<!ENTITY lstrok           "&#x00142;" ><!--=small l, stroke -->
+<!ENTITY Nacute           "&#x00143;" ><!--=capital N, acute accent -->
+<!ENTITY nacute           "&#x00144;" ><!--=small n, acute accent -->
+<!ENTITY napos            "&#x00149;" ><!--=small n, apostrophe -->
+<!ENTITY Ncaron           "&#x00147;" ><!--=capital N, caron -->
+<!ENTITY ncaron           "&#x00148;" ><!--=small n, caron -->
+<!ENTITY Ncedil           "&#x00145;" ><!--=capital N, cedilla -->
+<!ENTITY ncedil           "&#x00146;" ><!--=small n, cedilla -->
+<!ENTITY Odblac           "&#x00150;" ><!--=capital O, double acute accent -->
+<!ENTITY odblac           "&#x00151;" ><!--=small o, double acute accent -->
+<!ENTITY OElig            "&#x00152;" ><!--=capital OE ligature -->
+<!ENTITY oelig            "&#x00153;" ><!--=small oe ligature -->
+<!ENTITY Omacr            "&#x0014C;" ><!--=capital O, macron -->
+<!ENTITY omacr            "&#x0014D;" ><!--=small o, macron -->
+<!ENTITY Racute           "&#x00154;" ><!--=capital R, acute accent -->
+<!ENTITY racute           "&#x00155;" ><!--=small r, acute accent -->
+<!ENTITY Rcaron           "&#x00158;" ><!--=capital R, caron -->
+<!ENTITY rcaron           "&#x00159;" ><!--=small r, caron -->
+<!ENTITY Rcedil           "&#x00156;" ><!--=capital R, cedilla -->
+<!ENTITY rcedil           "&#x00157;" ><!--=small r, cedilla -->
+<!ENTITY Sacute           "&#x0015A;" ><!--=capital S, acute accent -->
+<!ENTITY sacute           "&#x0015B;" ><!--=small s, acute accent -->
+<!ENTITY Scaron           "&#x00160;" ><!--=capital S, caron -->
+<!ENTITY scaron           "&#x00161;" ><!--=small s, caron -->
+<!ENTITY Scedil           "&#x0015E;" ><!--=capital S, cedilla -->
+<!ENTITY scedil           "&#x0015F;" ><!--=small s, cedilla -->
+<!ENTITY Scirc            "&#x0015C;" ><!--=capital S, circumflex accent -->
+<!ENTITY scirc            "&#x0015D;" ><!--=small s, circumflex accent -->
+<!ENTITY Tcaron           "&#x00164;" ><!--=capital T, caron -->
+<!ENTITY tcaron           "&#x00165;" ><!--=small t, caron -->
+<!ENTITY Tcedil           "&#x00162;" ><!--=capital T, cedilla -->
+<!ENTITY tcedil           "&#x00163;" ><!--=small t, cedilla -->
+<!ENTITY Tstrok           "&#x00166;" ><!--=capital T, stroke -->
+<!ENTITY tstrok           "&#x00167;" ><!--=small t, stroke -->
+<!ENTITY Ubreve           "&#x0016C;" ><!--=capital U, breve -->
+<!ENTITY ubreve           "&#x0016D;" ><!--=small u, breve -->
+<!ENTITY Udblac           "&#x00170;" ><!--=capital U, double acute accent -->
+<!ENTITY udblac           "&#x00171;" ><!--=small u, double acute accent -->
+<!ENTITY Umacr            "&#x0016A;" ><!--=capital U, macron -->
+<!ENTITY umacr            "&#x0016B;" ><!--=small u, macron -->
+<!ENTITY Uogon            "&#x00172;" ><!--=capital U, ogonek -->
+<!ENTITY uogon            "&#x00173;" ><!--=small u, ogonek -->
+<!ENTITY Uring            "&#x0016E;" ><!--=capital U, ring -->
+<!ENTITY uring            "&#x0016F;" ><!--=small u, ring -->
+<!ENTITY Utilde           "&#x00168;" ><!--=capital U, tilde -->
+<!ENTITY utilde           "&#x00169;" ><!--=small u, tilde -->
+<!ENTITY Wcirc            "&#x00174;" ><!--=capital W, circumflex accent -->
+<!ENTITY wcirc            "&#x00175;" ><!--=small w, circumflex accent -->
+<!ENTITY Ycirc            "&#x00176;" ><!--=capital Y, circumflex accent -->
+<!ENTITY ycirc            "&#x00177;" ><!--=small y, circumflex accent -->
+<!ENTITY Yuml             "&#x00178;" ><!--=capital Y, dieresis or umlaut mark -->
+<!ENTITY Zacute           "&#x00179;" ><!--=capital Z, acute accent -->
+<!ENTITY zacute           "&#x0017A;" ><!--=small z, acute accent -->
+<!ENTITY Zcaron           "&#x0017D;" ><!--=capital Z, caron -->
+<!ENTITY zcaron           "&#x0017E;" ><!--=small z, caron -->
+<!ENTITY Zdot             "&#x0017B;" ><!--=capital Z, dot above -->
+<!ENTITY zdot             "&#x0017C;" ><!--=small z, dot above -->
diff --git a/dtd/isomfrk.ent b/dtd/isomfrk.ent
new file mode 100644
index 0000000..0e1a943
--- /dev/null
+++ b/dtd/isomfrk.ent
@@ -0,0 +1,75 @@
+
+<!--
+     File isomfrk.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY % plane1D  "&#38;#38;#x1D">
+
+<!ENTITY Afr              "%plane1D;504;" ><!--/frak A, upper case a -->
+<!ENTITY afr              "%plane1D;51E;" ><!--/frak a, lower case a -->
+<!ENTITY Bfr              "%plane1D;505;" ><!--/frak B, upper case b -->
+<!ENTITY bfr              "%plane1D;51F;" ><!--/frak b, lower case b -->
+<!ENTITY Cfr              "&#x0212D;" ><!--/frak C, upper case c -->
+<!ENTITY cfr              "%plane1D;520;" ><!--/frak c, lower case c -->
+<!ENTITY Dfr              "%plane1D;507;" ><!--/frak D, upper case d -->
+<!ENTITY dfr              "%plane1D;521;" ><!--/frak d, lower case d -->
+<!ENTITY Efr              "%plane1D;508;" ><!--/frak E, upper case e -->
+<!ENTITY efr              "%plane1D;522;" ><!--/frak e, lower case e -->
+<!ENTITY Ffr              "%plane1D;509;" ><!--/frak F, upper case f -->
+<!ENTITY ffr              "%plane1D;523;" ><!--/frak f, lower case f -->
+<!ENTITY Gfr              "%plane1D;50A;" ><!--/frak G, upper case g -->
+<!ENTITY gfr              "%plane1D;524;" ><!--/frak g, lower case g -->
+<!ENTITY Hfr              "&#x0210C;" ><!--/frak H, upper case h -->
+<!ENTITY hfr              "%plane1D;525;" ><!--/frak h, lower case h -->
+<!ENTITY Ifr              "&#x02111;" ><!--/frak I, upper case i -->
+<!ENTITY ifr              "%plane1D;526;" ><!--/frak i, lower case i -->
+<!ENTITY Jfr              "%plane1D;50D;" ><!--/frak J, upper case j -->
+<!ENTITY jfr              "%plane1D;527;" ><!--/frak j, lower case j -->
+<!ENTITY Kfr              "%plane1D;50E;" ><!--/frak K, upper case k -->
+<!ENTITY kfr              "%plane1D;528;" ><!--/frak k, lower case k -->
+<!ENTITY Lfr              "%plane1D;50F;" ><!--/frak L, upper case l -->
+<!ENTITY lfr              "%plane1D;529;" ><!--/frak l, lower case l -->
+<!ENTITY Mfr              "%plane1D;510;" ><!--/frak M, upper case m -->
+<!ENTITY mfr              "%plane1D;52A;" ><!--/frak m, lower case m -->
+<!ENTITY Nfr              "%plane1D;511;" ><!--/frak N, upper case n -->
+<!ENTITY nfr              "%plane1D;52B;" ><!--/frak n, lower case n -->
+<!ENTITY Ofr              "%plane1D;512;" ><!--/frak O, upper case o -->
+<!ENTITY ofr              "%plane1D;52C;" ><!--/frak o, lower case o -->
+<!ENTITY Pfr              "%plane1D;513;" ><!--/frak P, upper case p -->
+<!ENTITY pfr              "%plane1D;52D;" ><!--/frak p, lower case p -->
+<!ENTITY Qfr              "%plane1D;514;" ><!--/frak Q, upper case q -->
+<!ENTITY qfr              "%plane1D;52E;" ><!--/frak q, lower case q -->
+<!ENTITY Rfr              "&#x0211C;" ><!--/frak R, upper case r -->
+<!ENTITY rfr              "%plane1D;52F;" ><!--/frak r, lower case r -->
+<!ENTITY Sfr              "%plane1D;516;" ><!--/frak S, upper case s -->
+<!ENTITY sfr              "%plane1D;530;" ><!--/frak s, lower case s -->
+<!ENTITY Tfr              "%plane1D;517;" ><!--/frak T, upper case t -->
+<!ENTITY tfr              "%plane1D;531;" ><!--/frak t, lower case t -->
+<!ENTITY Ufr              "%plane1D;518;" ><!--/frak U, upper case u -->
+<!ENTITY ufr              "%plane1D;532;" ><!--/frak u, lower case u -->
+<!ENTITY Vfr              "%plane1D;519;" ><!--/frak V, upper case v -->
+<!ENTITY vfr              "%plane1D;533;" ><!--/frak v, lower case v -->
+<!ENTITY Wfr              "%plane1D;51A;" ><!--/frak W, upper case w -->
+<!ENTITY wfr              "%plane1D;534;" ><!--/frak w, lower case w -->
+<!ENTITY Xfr              "%plane1D;51B;" ><!--/frak X, upper case x -->
+<!ENTITY xfr              "%plane1D;535;" ><!--/frak x, lower case x -->
+<!ENTITY Yfr              "%plane1D;51C;" ><!--/frak Y, upper case y -->
+<!ENTITY yfr              "%plane1D;536;" ><!--/frak y, lower case y -->
+<!ENTITY Zfr              "&#x02128;" ><!--/frak Z, upper case z  -->
+<!ENTITY zfr              "%plane1D;537;" ><!--/frak z, lower case z -->
diff --git a/dtd/isomopf.ent b/dtd/isomopf.ent
new file mode 100644
index 0000000..4b26425
--- /dev/null
+++ b/dtd/isomopf.ent
@@ -0,0 +1,49 @@
+
+<!--
+     File isomopf.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY % plane1D  "&#38;#38;#x1D">
+
+<!ENTITY Aopf             "%plane1D;538;" ><!--/Bbb A, open face A -->
+<!ENTITY Bopf             "%plane1D;539;" ><!--/Bbb B, open face B -->
+<!ENTITY Copf             "&#x02102;" ><!--/Bbb C, open face C -->
+<!ENTITY Dopf             "%plane1D;53B;" ><!--/Bbb D, open face D -->
+<!ENTITY Eopf             "%plane1D;53C;" ><!--/Bbb E, open face E -->
+<!ENTITY Fopf             "%plane1D;53D;" ><!--/Bbb F, open face F -->
+<!ENTITY Gopf             "%plane1D;53E;" ><!--/Bbb G, open face G -->
+<!ENTITY Hopf             "&#x0210D;" ><!--/Bbb H, open face H -->
+<!ENTITY Iopf             "%plane1D;540;" ><!--/Bbb I, open face I -->
+<!ENTITY Jopf             "%plane1D;541;" ><!--/Bbb J, open face J -->
+<!ENTITY Kopf             "%plane1D;542;" ><!--/Bbb K, open face K  -->
+<!ENTITY Lopf             "%plane1D;543;" ><!--/Bbb L, open face L  -->
+<!ENTITY Mopf             "%plane1D;544;" ><!--/Bbb M, open face M  -->
+<!ENTITY Nopf             "&#x02115;" ><!--/Bbb N, open face N -->
+<!ENTITY Oopf             "%plane1D;546;" ><!--/Bbb O, open face O -->
+<!ENTITY Popf             "&#x02119;" ><!--/Bbb P, open face P -->
+<!ENTITY Qopf             "&#x0211A;" ><!--/Bbb Q, open face Q -->
+<!ENTITY Ropf             "&#x0211D;" ><!--/Bbb R, open face R -->
+<!ENTITY Sopf             "%plane1D;54A;" ><!--/Bbb S, open face S -->
+<!ENTITY Topf             "%plane1D;54B;" ><!--/Bbb T, open face T -->
+<!ENTITY Uopf             "%plane1D;54C;" ><!--/Bbb U, open face U -->
+<!ENTITY Vopf             "%plane1D;54D;" ><!--/Bbb V, open face V -->
+<!ENTITY Wopf             "%plane1D;54E;" ><!--/Bbb W, open face W -->
+<!ENTITY Xopf             "%plane1D;54F;" ><!--/Bbb X, open face X -->
+<!ENTITY Yopf             "%plane1D;550;" ><!--/Bbb Y, open face Y -->
+<!ENTITY Zopf             "&#x02124;" ><!--/Bbb Z, open face Z -->
diff --git a/dtd/isomscr.ent b/dtd/isomscr.ent
new file mode 100644
index 0000000..a2174f0
--- /dev/null
+++ b/dtd/isomscr.ent
@@ -0,0 +1,75 @@
+
+<!--
+     File isomscr.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY % plane1D  "&#38;#38;#x1D">
+
+<!ENTITY Ascr             "%plane1D;49C;" ><!--/scr A, script letter A -->
+<!ENTITY ascr             "%plane1D;4B6;" ><!--/scr a, script letter a -->
+<!ENTITY Bscr             "&#x0212C;" ><!--/scr B, script letter B -->
+<!ENTITY bscr             "%plane1D;4B7;" ><!--/scr b, script letter b -->
+<!ENTITY Cscr             "%plane1D;49E;" ><!--/scr C, script letter C -->
+<!ENTITY cscr             "%plane1D;4B8;" ><!--/scr c, script letter c -->
+<!ENTITY Dscr             "%plane1D;49F;" ><!--/scr D, script letter D -->
+<!ENTITY dscr             "%plane1D;4B9;" ><!--/scr d, script letter d -->
+<!ENTITY Escr             "&#x02130;" ><!--/scr E, script letter E -->
+<!ENTITY escr             "&#x0212F;" ><!--/scr e, script letter e -->
+<!ENTITY Fscr             "&#x02131;" ><!--/scr F, script letter F -->
+<!ENTITY fscr             "%plane1D;4BB;" ><!--/scr f, script letter f -->
+<!ENTITY Gscr             "%plane1D;4A2;" ><!--/scr G, script letter G -->
+<!ENTITY gscr             "&#x0210A;" ><!--/scr g, script letter g -->
+<!ENTITY Hscr             "&#x0210B;" ><!--/scr H, script letter H -->
+<!ENTITY hscr             "%plane1D;4BD;" ><!--/scr h, script letter h -->
+<!ENTITY Iscr             "&#x02110;" ><!--/scr I, script letter I -->
+<!ENTITY iscr             "%plane1D;4BE;" ><!--/scr i, script letter i -->
+<!ENTITY Jscr             "%plane1D;4A5;" ><!--/scr J, script letter J -->
+<!ENTITY jscr             "%plane1D;4BF;" ><!--/scr j, script letter j -->
+<!ENTITY Kscr             "%plane1D;4A6;" ><!--/scr K, script letter K -->
+<!ENTITY kscr             "%plane1D;4C0;" ><!--/scr k, script letter k -->
+<!ENTITY Lscr             "&#x02112;" ><!--/scr L, script letter L -->
+<!ENTITY lscr             "%plane1D;4C1;" ><!--/scr l, script letter l -->
+<!ENTITY Mscr             "&#x02133;" ><!--/scr M, script letter M -->
+<!ENTITY mscr             "%plane1D;4C2;" ><!--/scr m, script letter m -->
+<!ENTITY Nscr             "%plane1D;4A9;" ><!--/scr N, script letter N -->
+<!ENTITY nscr             "%plane1D;4C3;" ><!--/scr n, script letter n -->
+<!ENTITY Oscr             "%plane1D;4AA;" ><!--/scr O, script letter O -->
+<!ENTITY oscr             "&#x02134;" ><!--/scr o, script letter o -->
+<!ENTITY Pscr             "%plane1D;4AB;" ><!--/scr P, script letter P -->
+<!ENTITY pscr             "%plane1D;4C5;" ><!--/scr p, script letter p -->
+<!ENTITY Qscr             "%plane1D;4AC;" ><!--/scr Q, script letter Q -->
+<!ENTITY qscr             "%plane1D;4C6;" ><!--/scr q, script letter q -->
+<!ENTITY Rscr             "&#x0211B;" ><!--/scr R, script letter R -->
+<!ENTITY rscr             "%plane1D;4C7;" ><!--/scr r, script letter r -->
+<!ENTITY Sscr             "%plane1D;4AE;" ><!--/scr S, script letter S -->
+<!ENTITY sscr             "%plane1D;4C8;" ><!--/scr s, script letter s -->
+<!ENTITY Tscr             "%plane1D;4AF;" ><!--/scr T, script letter T -->
+<!ENTITY tscr             "%plane1D;4C9;" ><!--/scr t, script letter t -->
+<!ENTITY Uscr             "%plane1D;4B0;" ><!--/scr U, script letter U -->
+<!ENTITY uscr             "%plane1D;4CA;" ><!--/scr u, script letter u -->
+<!ENTITY Vscr             "%plane1D;4B1;" ><!--/scr V, script letter V -->
+<!ENTITY vscr             "%plane1D;4CB;" ><!--/scr v, script letter v -->
+<!ENTITY Wscr             "%plane1D;4B2;" ><!--/scr W, script letter W -->
+<!ENTITY wscr             "%plane1D;4CC;" ><!--/scr w, script letter w -->
+<!ENTITY Xscr             "%plane1D;4B3;" ><!--/scr X, script letter X -->
+<!ENTITY xscr             "%plane1D;4CD;" ><!--/scr x, script letter x -->
+<!ENTITY Yscr             "%plane1D;4B4;" ><!--/scr Y, script letter Y -->
+<!ENTITY yscr             "%plane1D;4CE;" ><!--/scr y, script letter y -->
+<!ENTITY Zscr             "%plane1D;4B5;" ><!--/scr Z, script letter Z -->
+<!ENTITY zscr             "%plane1D;4CF;" ><!--/scr z, script letter z -->
diff --git a/dtd/isonum.ent b/dtd/isonum.ent
new file mode 100644
index 0000000..79f4380
--- /dev/null
+++ b/dtd/isonum.ent
@@ -0,0 +1,97 @@
+
+<!--
+     File isonum.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY amp              "&#38;#38;" ><!--=ampersand -->
+<!ENTITY apos             "&#x00027;" ><!--=apostrophe -->
+<!ENTITY ast              "&#x0002A;" ><!--/ast B: =asterisk -->
+<!ENTITY brvbar           "&#x000A6;" ><!--=broken (vertical) bar -->
+<!ENTITY bsol             "&#x0005C;" ><!--/backslash =reverse solidus -->
+<!ENTITY cent             "&#x000A2;" ><!--=cent sign -->
+<!ENTITY colon            "&#x0003A;" ><!--/colon P: -->
+<!ENTITY comma            "&#x0002C;" ><!--P: =comma -->
+<!ENTITY commat           "&#x00040;" ><!--=commercial at -->
+<!ENTITY copy             "&#x000A9;" ><!--=copyright sign -->
+<!ENTITY curren           "&#x000A4;" ><!--=general currency sign -->
+<!ENTITY darr             "&#x02193;" ><!--/downarrow A: =downward arrow -->
+<!ENTITY deg              "&#x000B0;" ><!--=degree sign -->
+<!ENTITY divide           "&#x000F7;" ><!--/div B: =divide sign -->
+<!ENTITY dollar           "&#x00024;" ><!--=dollar sign -->
+<!ENTITY equals           "&#x0003D;" ><!--=equals sign R: -->
+<!ENTITY excl             "&#x00021;" ><!--=exclamation mark -->
+<!ENTITY frac12           "&#x000BD;" ><!--=fraction one-half -->
+<!ENTITY frac14           "&#x000BC;" ><!--=fraction one-quarter -->
+<!ENTITY frac18           "&#x0215B;" ><!--=fraction one-eighth -->
+<!ENTITY frac34           "&#x000BE;" ><!--=fraction three-quarters -->
+<!ENTITY frac38           "&#x0215C;" ><!--=fraction three-eighths -->
+<!ENTITY frac58           "&#x0215D;" ><!--=fraction five-eighths -->
+<!ENTITY frac78           "&#x0215E;" ><!--=fraction seven-eighths -->
+<!ENTITY gt               "&#x0003E;" ><!--=greater-than sign R: -->
+<!ENTITY half             "&#x000BD;" ><!--=fraction one-half -->
+<!ENTITY horbar           "&#x02015;" ><!--=horizontal bar -->
+<!ENTITY hyphen           "&#x02010;" ><!--=hyphen -->
+<!ENTITY iexcl            "&#x000A1;" ><!--=inverted exclamation mark -->
+<!ENTITY iquest           "&#x000BF;" ><!--=inverted question mark -->
+<!ENTITY laquo            "&#x000AB;" ><!--=angle quotation mark, left -->
+<!ENTITY larr             "&#x02190;" ><!--/leftarrow /gets A: =leftward arrow -->
+<!ENTITY lcub             "&#x0007B;" ><!--/lbrace O: =left curly bracket -->
+<!ENTITY ldquo            "&#x0201C;" ><!--=double quotation mark, left -->
+<!ENTITY lowbar           "&#x0005F;" ><!--=low line -->
+<!ENTITY lpar             "&#x00028;" ><!--O: =left parenthesis -->
+<!ENTITY lsqb             "&#x0005B;" ><!--/lbrack O: =left square bracket -->
+<!ENTITY lsquo            "&#x02018;" ><!--=single quotation mark, left -->
+<!ENTITY lt               "&#38;#60;" ><!--=less-than sign R: -->
+<!ENTITY micro            "&#x000B5;" ><!--=micro sign -->
+<!ENTITY middot           "&#x000B7;" ><!--/centerdot B: =middle dot -->
+<!ENTITY nbsp             "&#x000A0;" ><!--=no break (required) space -->
+<!ENTITY not              "&#x000AC;" ><!--/neg /lnot =not sign -->
+<!ENTITY num              "&#x00023;" ><!--=number sign -->
+<!ENTITY ohm              "&#x02126;" ><!--=ohm sign -->
+<!ENTITY ordf             "&#x000AA;" ><!--=ordinal indicator, feminine -->
+<!ENTITY ordm             "&#x000BA;" ><!--=ordinal indicator, masculine -->
+<!ENTITY para             "&#x000B6;" ><!--=pilcrow (paragraph sign) -->
+<!ENTITY percnt           "&#x00025;" ><!--=percent sign -->
+<!ENTITY period           "&#x0002E;" ><!--=full stop, period -->
+<!ENTITY plus             "&#x0002B;" ><!--=plus sign B: -->
+<!ENTITY plusmn           "&#x000B1;" ><!--/pm B: =plus-or-minus sign -->
+<!ENTITY pound            "&#x000A3;" ><!--=pound sign -->
+<!ENTITY quest            "&#x0003F;" ><!--=question mark -->
+<!ENTITY quot             "&#x00022;" ><!--=quotation mark -->
+<!ENTITY raquo            "&#x000BB;" ><!--=angle quotation mark, right -->
+<!ENTITY rarr             "&#x02192;" ><!--/rightarrow /to A: =rightward arrow -->
+<!ENTITY rcub             "&#x0007D;" ><!--/rbrace C: =right curly bracket -->
+<!ENTITY rdquo            "&#x0201D;" ><!--=double quotation mark, right -->
+<!ENTITY reg              "&#x000AE;" ><!--/circledR =registered sign -->
+<!ENTITY rpar             "&#x00029;" ><!--C: =right parenthesis -->
+<!ENTITY rsqb             "&#x0005D;" ><!--/rbrack C: =right square bracket -->
+<!ENTITY rsquo            "&#x02019;" ><!--=single quotation mark, right -->
+<!ENTITY sect             "&#x000A7;" ><!--=section sign -->
+<!ENTITY semi             "&#x0003B;" ><!--=semicolon P: -->
+<!ENTITY shy              "&#x000AD;" ><!--=soft hyphen -->
+<!ENTITY sol              "&#x0002F;" ><!--=solidus -->
+<!ENTITY sung             "&#x0266A;" ><!--=music note (sung text sign) -->
+<!ENTITY sup1             "&#x000B9;" ><!--=superscript one -->
+<!ENTITY sup2             "&#x000B2;" ><!--=superscript two -->
+<!ENTITY sup3             "&#x000B3;" ><!--=superscript three -->
+<!ENTITY times            "&#x000D7;" ><!--/times B: =multiply sign -->
+<!ENTITY trade            "&#x02122;" ><!--=trade mark sign -->
+<!ENTITY uarr             "&#x02191;" ><!--/uparrow A: =upward arrow -->
+<!ENTITY verbar           "&#x0007C;" ><!--/vert =vertical bar -->
+<!ENTITY yen              "&#x000A5;" ><!--/yen =yen sign -->
diff --git a/dtd/isopub.ent b/dtd/isopub.ent
new file mode 100644
index 0000000..9b27b63
--- /dev/null
+++ b/dtd/isopub.ent
@@ -0,0 +1,105 @@
+
+<!--
+     File isopub.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY blank            "&#x02423;" ><!--=significant blank symbol -->
+<!ENTITY blk12            "&#x02592;" ><!--=50% shaded block -->
+<!ENTITY blk14            "&#x02591;" ><!--=25% shaded block -->
+<!ENTITY blk34            "&#x02593;" ><!--=75% shaded block -->
+<!ENTITY block            "&#x02588;" ><!--=full block -->
+<!ENTITY bull             "&#x02022;" ><!--/bullet B: =round bullet, filled -->
+<!ENTITY caret            "&#x02041;" ><!--=caret (insertion mark) -->
+<!ENTITY check            "&#x02713;" ><!--/checkmark =tick, check mark -->
+<!ENTITY cir              "&#x025CB;" ><!--/circ B: =circle, open -->
+<!ENTITY clubs            "&#x02663;" ><!--/clubsuit =club suit symbol  -->
+<!ENTITY copysr           "&#x02117;" ><!--=sound recording copyright sign -->
+<!ENTITY cross            "&#x02717;" ><!--=ballot cross -->
+<!ENTITY Dagger           "&#x02021;" ><!--/ddagger B: =double dagger -->
+<!ENTITY dagger           "&#x02020;" ><!--/dagger B: =dagger -->
+<!ENTITY dash             "&#x02010;" ><!--=hyphen (true graphic) -->
+<!ENTITY diams            "&#x02666;" ><!--/diamondsuit =diamond suit symbol  -->
+<!ENTITY dlcrop           "&#x0230D;" ><!--downward left crop mark  -->
+<!ENTITY drcrop           "&#x0230C;" ><!--downward right crop mark  -->
+<!ENTITY dtri             "&#x025BF;" ><!--/triangledown =down triangle, open -->
+<!ENTITY dtrif            "&#x025BE;" ><!--/blacktriangledown =dn tri, filled -->
+<!ENTITY emsp             "&#x02003;" ><!--=em space -->
+<!ENTITY emsp13           "&#x02004;" ><!--=1/3-em space -->
+<!ENTITY emsp14           "&#x02005;" ><!--=1/4-em space -->
+<!ENTITY ensp             "&#x02002;" ><!--=en space (1/2-em) -->
+<!ENTITY female           "&#x02640;" ><!--=female symbol -->
+<!ENTITY ffilig           "&#x0FB03;" ><!--small ffi ligature -->
+<!ENTITY fflig            "&#x0FB00;" ><!--small ff ligature -->
+<!ENTITY ffllig           "&#x0FB04;" ><!--small ffl ligature -->
+<!ENTITY filig            "&#x0FB01;" ><!--small fi ligature -->
+<!ENTITY flat             "&#x0266D;" ><!--/flat =musical flat -->
+<!ENTITY fllig            "&#x0FB02;" ><!--small fl ligature -->
+<!ENTITY frac13           "&#x02153;" ><!--=fraction one-third -->
+<!ENTITY frac15           "&#x02155;" ><!--=fraction one-fifth -->
+<!ENTITY frac16           "&#x02159;" ><!--=fraction one-sixth -->
+<!ENTITY frac23           "&#x02154;" ><!--=fraction two-thirds -->
+<!ENTITY frac25           "&#x02156;" ><!--=fraction two-fifths -->
+<!ENTITY frac35           "&#x02157;" ><!--=fraction three-fifths -->
+<!ENTITY frac45           "&#x02158;" ><!--=fraction four-fifths -->
+<!ENTITY frac56           "&#x0215A;" ><!--=fraction five-sixths -->
+<!ENTITY hairsp           "&#x0200A;" ><!--=hair space -->
+<!ENTITY hearts           "&#x02665;" ><!--/heartsuit =heart suit symbol -->
+<!ENTITY hellip           "&#x02026;" ><!--=ellipsis (horizontal) -->
+<!ENTITY hybull           "&#x02043;" ><!--rectangle, filled (hyphen bullet) -->
+<!ENTITY incare           "&#x02105;" ><!--=in-care-of symbol -->
+<!ENTITY ldquor           "&#x0201E;" ><!--=rising dbl quote, left (low) -->
+<!ENTITY lhblk            "&#x02584;" ><!--=lower half block -->
+<!ENTITY loz              "&#x025CA;" ><!--/lozenge - lozenge or total mark -->
+<!ENTITY lozf             "&#x029EB;" ><!--/blacklozenge - lozenge, filled -->
+<!ENTITY lsquor           "&#x0201A;" ><!--=rising single quote, left (low) -->
+<!ENTITY ltri             "&#x025C3;" ><!--/triangleleft B: l triangle, open -->
+<!ENTITY ltrif            "&#x025C2;" ><!--/blacktriangleleft R: =l tri, filled -->
+<!ENTITY male             "&#x02642;" ><!--=male symbol -->
+<!ENTITY malt             "&#x02720;" ><!--/maltese =maltese cross -->
+<!ENTITY marker           "&#x025AE;" ><!--=histogram marker -->
+<!ENTITY mdash            "&#x02014;" ><!--=em dash  -->
+<!ENTITY mldr             "&#x02026;" ><!--em leader -->
+<!ENTITY natur            "&#x0266E;" ><!--/natural - music natural -->
+<!ENTITY ndash            "&#x02013;" ><!--=en dash -->
+<!ENTITY nldr             "&#x02025;" ><!--=double baseline dot (en leader) -->
+<!ENTITY numsp            "&#x02007;" ><!--=digit space (width of a number) -->
+<!ENTITY phone            "&#x0260E;" ><!--=telephone symbol  -->
+<!ENTITY puncsp           "&#x02008;" ><!--=punctuation space (width of comma) -->
+<!ENTITY rdquor           "&#x0201D;" ><!--rising dbl quote, right (high) -->
+<!ENTITY rect             "&#x025AD;" ><!--=rectangle, open -->
+<!ENTITY rsquor           "&#x02019;" ><!--rising single quote, right (high) -->
+<!ENTITY rtri             "&#x025B9;" ><!--/triangleright B: r triangle, open -->
+<!ENTITY rtrif            "&#x025B8;" ><!--/blacktriangleright R: =r tri, filled -->
+<!ENTITY rx               "&#x0211E;" ><!--pharmaceutical prescription (Rx) -->
+<!ENTITY sext             "&#x02736;" ><!--sextile (6-pointed star) -->
+<!ENTITY sharp            "&#x0266F;" ><!--/sharp =musical sharp -->
+<!ENTITY spades           "&#x02660;" ><!--/spadesuit =spades suit symbol  -->
+<!ENTITY squ              "&#x025A1;" ><!--=square, open -->
+<!ENTITY squf             "&#x025AA;" ><!--/blacksquare =sq bullet, filled -->
+<!ENTITY star             "&#x02606;" ><!--=star, open -->
+<!ENTITY starf            "&#x02605;" ><!--/bigstar - star, filled  -->
+<!ENTITY target           "&#x02316;" ><!--register mark or target -->
+<!ENTITY telrec           "&#x02315;" ><!--=telephone recorder symbol -->
+<!ENTITY thinsp           "&#x02009;" ><!--=thin space (1/6-em) -->
+<!ENTITY uhblk            "&#x02580;" ><!--=upper half block -->
+<!ENTITY ulcrop           "&#x0230F;" ><!--upward left crop mark  -->
+<!ENTITY urcrop           "&#x0230E;" ><!--upward right crop mark  -->
+<!ENTITY utri             "&#x025B5;" ><!--/triangle =up triangle, open -->
+<!ENTITY utrif            "&#x025B4;" ><!--/blacktriangle =up tri, filled -->
+<!ENTITY vellip           "&#x022EE;" ><!--vertical ellipsis -->
diff --git a/dtd/isotech.ent b/dtd/isotech.ent
new file mode 100644
index 0000000..d94c775
--- /dev/null
+++ b/dtd/isotech.ent
@@ -0,0 +1,182 @@
+
+<!--
+     File isotech.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     Entity names in this file are derived from files carrying the
+     following notice:
+
+     (C) International Organization for Standardization 1991
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+
+-->
+
+<!ENTITY acd              "&#x0223F;" ><!--ac current -->
+<!ENTITY aleph            "&#x02135;" ><!--/aleph aleph, Hebrew -->
+<!ENTITY And              "&#x02A53;" ><!--dbl logical and -->
+<!ENTITY and              "&#x02227;" ><!--/wedge /land B: logical and -->
+<!ENTITY andand           "&#x02A55;" ><!--two logical and -->
+<!ENTITY andd             "&#x02A5C;" ><!--and, horizontal dash -->
+<!ENTITY andslope         "&#x02A58;" ><!--sloping large and -->
+<!ENTITY andv             "&#x02A5A;" ><!--and with middle stem -->
+<!ENTITY angrt            "&#x0221F;" ><!--right (90 degree) angle -->
+<!ENTITY angsph           "&#x02222;" ><!--/sphericalangle angle-spherical -->
+<!ENTITY angst            "&#x0212B;" ><!--Angstrom capital A, ring -->
+<!ENTITY ap               "&#x02248;" ><!--/approx R: approximate -->
+<!ENTITY apacir           "&#x02A6F;" ><!--approximate, circumflex accent -->
+<!ENTITY awconint         "&#x02233;" ><!--contour integral, anti-clockwise -->
+<!ENTITY awint            "&#x02A11;" ><!--anti clock-wise integration -->
+<!ENTITY becaus           "&#x02235;" ><!--/because R: because -->
+<!ENTITY bernou           "&#x0212C;" ><!--Bernoulli function (script capital B)  -->
+<!ENTITY bne              "&#x0003D;&#x020E5;" ><!--reverse not equal -->
+<!ENTITY bnequiv          "&#x02261;&#x020E5;" ><!--reverse not equivalent -->
+<!ENTITY bNot             "&#x02AED;" ><!--reverse not with two horizontal strokes -->
+<!ENTITY bnot             "&#x02310;" ><!--reverse not -->
+<!ENTITY bottom           "&#x022A5;" ><!--/bot bottom -->
+<!ENTITY cap              "&#x02229;" ><!--/cap B: intersection -->
+<!ENTITY Cconint          "&#x02230;" ><!--triple contour integral operator -->
+<!ENTITY cirfnint         "&#x02A10;" ><!--circulation function -->
+<!ENTITY compfn           "&#x02218;" ><!--/circ B: composite function (small circle) -->
+<!ENTITY cong             "&#x02245;" ><!--/cong R: congruent with -->
+<!ENTITY Conint           "&#x0222F;" ><!--double contour integral operator -->
+<!ENTITY conint           "&#x0222E;" ><!--/oint L: contour integral operator -->
+<!ENTITY ctdot            "&#x022EF;" ><!--/cdots, three dots, centered -->
+<!ENTITY cup              "&#x0222A;" ><!--/cup B: union or logical sum -->
+<!ENTITY cwconint         "&#x02232;" ><!--contour integral, clockwise -->
+<!ENTITY cwint            "&#x02231;" ><!--clockwise integral -->
+<!ENTITY cylcty           "&#x0232D;" ><!--cylindricity -->
+<!ENTITY disin            "&#x022F2;" ><!--set membership, long horizontal stroke -->
+<!ENTITY Dot              "&#x000A8;" ><!--dieresis or umlaut mark -->
+<!ENTITY DotDot           "&#x020DC;" ><!--four dots above -->
+<!ENTITY dsol             "&#x029F6;" ><!--solidus, bar above -->
+<!ENTITY dtdot            "&#x022F1;" ><!--/ddots, three dots, descending -->
+<!ENTITY dwangle          "&#x029A6;" ><!--large downward pointing angle -->
+<!ENTITY elinters         "&#x0FFFD;" ><!--electrical intersection -->
+<!ENTITY epar             "&#x022D5;" ><!--parallel, equal; equal or parallel -->
+<!ENTITY eparsl           "&#x029E3;" ><!--parallel, slanted, equal; homothetically congruent to -->
+<!ENTITY equiv            "&#x02261;" ><!--/equiv R: identical with -->
+<!ENTITY eqvparsl         "&#x029E5;" ><!--equivalent, equal; congruent and parallel -->
+<!ENTITY exist            "&#x02203;" ><!--/exists at least one exists -->
+<!ENTITY fltns            "&#x025B1;" ><!--flatness -->
+<!ENTITY fnof             "&#x00192;" ><!--function of (italic small f) -->
+<!ENTITY forall           "&#x02200;" ><!--/forall for all -->
+<!ENTITY fpartint         "&#x02A0D;" ><!--finite part integral -->
+<!ENTITY ge               "&#x02265;" ><!--/geq /ge R: greater-than-or-equal -->
+<!ENTITY hamilt           "&#x0210B;" ><!--Hamiltonian (script capital H)  -->
+<!ENTITY iff              "&#x021D4;" ><!--/iff if and only if  -->
+<!ENTITY iinfin           "&#x029DC;" ><!--infinity sign, incomplete -->
+<!ENTITY imped            "&#x001B5;" ><!--impedance -->
+<!ENTITY infin            "&#x0221E;" ><!--/infty infinity -->
+<!ENTITY infintie         "&#x029DD;" ><!--tie, infinity -->
+<!ENTITY Int              "&#x0222C;" ><!--double integral operator -->
+<!ENTITY int              "&#x0222B;" ><!--/int L: integral operator -->
+<!ENTITY intlarhk         "&#x02A17;" ><!--integral, left arrow with hook -->
+<!ENTITY isin             "&#x02208;" ><!--/in R: set membership  -->
+<!ENTITY isindot          "&#x022F5;" ><!--set membership, dot above -->
+<!ENTITY isinE            "&#x022F9;" ><!--set membership, two horizontal strokes -->
+<!ENTITY isins            "&#x022F4;" ><!--set membership, vertical bar on horizontal stroke -->
+<!ENTITY isinsv           "&#x022F3;" ><!--large set membership, vertical bar on horizontal stroke -->
+<!ENTITY isinv            "&#x02208;" ><!--set membership, variant -->
+<!ENTITY lagran           "&#x02112;" ><!--Lagrangian (script capital L)  -->
+<!ENTITY Lang             "&#x0300A;" ><!--left angle bracket, double -->
+<!ENTITY lang             "&#x02329;" ><!--/langle O: left angle bracket -->
+<!ENTITY lArr             "&#x021D0;" ><!--/Leftarrow A: is implied by -->
+<!ENTITY lbbrk            "&#x03014;" ><!--left broken bracket -->
+<!ENTITY le               "&#x02264;" ><!--/leq /le R: less-than-or-equal -->
+<!ENTITY loang            "&#x03018;" ><!--left open angular bracket -->
+<!ENTITY lobrk            "&#x0301A;" ><!--left open bracket -->
+<!ENTITY lopar            "&#x02985;" ><!--left open parenthesis -->
+<!ENTITY lowast           "&#x02217;" ><!--low asterisk -->
+<!ENTITY minus            "&#x02212;" ><!--B: minus sign -->
+<!ENTITY mnplus           "&#x02213;" ><!--/mp B: minus-or-plus sign -->
+<!ENTITY nabla            "&#x02207;" ><!--/nabla del, Hamilton operator -->
+<!ENTITY ne               "&#x02260;" ><!--/ne /neq R: not equal -->
+<!ENTITY nedot            "&#x02250;&#x00338;" ><!--not equal, dot -->
+<!ENTITY nhpar            "&#x02AF2;" ><!--not, horizontal, parallel -->
+<!ENTITY ni               "&#x0220B;" ><!--/ni /owns R: contains -->
+<!ENTITY nis              "&#x022FC;" ><!--contains, vertical bar on horizontal stroke -->
+<!ENTITY nisd             "&#x022FA;" ><!--contains, long horizontal stroke -->
+<!ENTITY niv              "&#x0220B;" ><!--contains, variant -->
+<!ENTITY Not              "&#x02AEC;" ><!--not with two horizontal strokes -->
+<!ENTITY notin            "&#x02209;" ><!--/notin N: negated set membership -->
+<!ENTITY notindot         "&#x022F5;&#x00338;" ><!--negated set membership, dot above -->
+<!ENTITY notinE           "&#x022F9;&#x00338;" ><!--negated set membership, two horizontal strokes -->
+<!ENTITY notinva          "&#x02209;" ><!--negated set membership, variant -->
+<!ENTITY notinvb          "&#x022F7;" ><!--negated set membership, variant -->
+<!ENTITY notinvc          "&#x022F6;" ><!--negated set membership, variant -->
+<!ENTITY notni            "&#x0220C;" ><!--negated contains -->
+<!ENTITY notniva          "&#x0220C;" ><!--negated contains, variant -->
+<!ENTITY notnivb          "&#x022FE;" ><!--contains, variant -->
+<!ENTITY notnivc          "&#x022FD;" ><!--contains, variant -->
+<!ENTITY nparsl           "&#x02AFD;&#x020E5;" ><!--not parallel, slanted -->
+<!ENTITY npart            "&#x02202;&#x00338;" ><!--not partial differential -->
+<!ENTITY npolint          "&#x02A14;" ><!--line integration, not including the pole -->
+<!ENTITY nvinfin          "&#x029DE;" ><!--not, vert, infinity -->
+<!ENTITY olcross          "&#x029BB;" ><!--circle, cross -->
+<!ENTITY Or               "&#x02A54;" ><!--dbl logical or -->
+<!ENTITY or               "&#x02228;" ><!--/vee /lor B: logical or -->
+<!ENTITY ord              "&#x02A5D;" ><!--or, horizontal dash -->
+<!ENTITY order            "&#x02134;" ><!--order of (script small o)  -->
+<!ENTITY oror             "&#x02A56;" ><!--two logical or -->
+<!ENTITY orslope          "&#x02A57;" ><!--sloping large or -->
+<!ENTITY orv              "&#x02A5B;" ><!--or with middle stem -->
+<!ENTITY par              "&#x02225;" ><!--/parallel R: parallel -->
+<!ENTITY parsl            "&#x02AFD;" ><!--parallel, slanted -->
+<!ENTITY part             "&#x02202;" ><!--/partial partial differential -->
+<!ENTITY permil           "&#x02030;" ><!--per thousand -->
+<!ENTITY perp             "&#x022A5;" ><!--/perp R: perpendicular -->
+<!ENTITY pertenk          "&#x02031;" ><!--per 10 thousand -->
+<!ENTITY phmmat           "&#x02133;" ><!--physics M-matrix (script capital M)  -->
+<!ENTITY pointint         "&#x02A15;" ><!--integral around a point operator -->
+<!ENTITY Prime            "&#x02033;" ><!--double prime or second -->
+<!ENTITY prime            "&#x02032;" ><!--/prime prime or minute -->
+<!ENTITY profalar         "&#x0232E;" ><!--all-around profile -->
+<!ENTITY profline         "&#x02312;" ><!--profile of a line -->
+<!ENTITY profsurf         "&#x02313;" ><!--profile of a surface -->
+<!ENTITY prop             "&#x0221D;" ><!--/propto R: is proportional to -->
+<!ENTITY qint             "&#x02A0C;" ><!--/iiiint quadruple integral operator -->
+<!ENTITY qprime           "&#x02057;" ><!--quadruple prime -->
+<!ENTITY quatint          "&#x02A16;" ><!--quaternion integral operator -->
+<!ENTITY radic            "&#x0221A;" ><!--/surd radical -->
+<!ENTITY Rang             "&#x0300B;" ><!--right angle bracket, double -->
+<!ENTITY rang             "&#x0232A;" ><!--/rangle C: right angle bracket -->
+<!ENTITY rArr             "&#x021D2;" ><!--/Rightarrow A: implies -->
+<!ENTITY rbbrk            "&#x03015;" ><!--right broken bracket -->
+<!ENTITY roang            "&#x03019;" ><!--right open angular bracket -->
+<!ENTITY robrk            "&#x0301B;" ><!--right open bracket -->
+<!ENTITY ropar            "&#x02986;" ><!--right open parenthesis -->
+<!ENTITY rppolint         "&#x02A12;" ><!--line integration, rectangular path around pole -->
+<!ENTITY scpolint         "&#x02A13;" ><!--line integration, semi-circular path around pole -->
+<!ENTITY sim              "&#x0223C;" ><!--/sim R: similar -->
+<!ENTITY simdot           "&#x02A6A;" ><!--similar, dot -->
+<!ENTITY sime             "&#x02243;" ><!--/simeq R: similar, equals -->
+<!ENTITY smeparsl         "&#x029E4;" ><!--similar, parallel, slanted, equal -->
+<!ENTITY square           "&#x025A1;" ><!--/square, square -->
+<!ENTITY squarf           "&#x025AA;" ><!--/blacksquare, square, filled  -->
+<!ENTITY strns            "&#x000AF;" ><!--straightness -->
+<!ENTITY sub              "&#x02282;" ><!--/subset R: subset or is implied by -->
+<!ENTITY sube             "&#x02286;" ><!--/subseteq R: subset, equals -->
+<!ENTITY sup              "&#x02283;" ><!--/supset R: superset or implies -->
+<!ENTITY supe             "&#x02287;" ><!--/supseteq R: superset, equals -->
+<!ENTITY tdot             "&#x020DB;" ><!--three dots above -->
+<!ENTITY there4           "&#x02234;" ><!--/therefore R: therefore -->
+<!ENTITY tint             "&#x0222D;" ><!--/iiint triple integral operator -->
+<!ENTITY top              "&#x022A4;" ><!--/top top -->
+<!ENTITY topbot           "&#x02336;" ><!--top and bottom -->
+<!ENTITY topcir           "&#x02AF1;" ><!--top, circle below -->
+<!ENTITY tprime           "&#x02034;" ><!--triple prime -->
+<!ENTITY utdot            "&#x022F0;" ><!--three dots, ascending -->
+<!ENTITY uwangle          "&#x029A7;" ><!--large upward pointing angle -->
+<!ENTITY vangrt           "&#x0299C;" ><!--right angle, variant -->
+<!ENTITY veeeq            "&#x0225A;" ><!--logical or, equals -->
+<!ENTITY Verbar           "&#x02016;" ><!--/Vert dbl vertical bar -->
+<!ENTITY wedgeq           "&#x02259;" ><!--/wedgeq R: corresponds to (wedge, equals) -->
+<!ENTITY xnis             "&#x022FB;" ><!--large contains, vertical bar on horizontal stroke -->
diff --git a/dtd/journalmeta.ent b/dtd/journalmeta.ent
new file mode 100644
index 0000000..09cd70a
--- /dev/null
+++ b/dtd/journalmeta.ent
@@ -0,0 +1,341 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Metadata Elements                         -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Journal Metadata Elements v2.0 20040830//EN"
+     Delivered as file "journalmeta.ent"                           -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements used to describe the journal   -->
+<!--             in which the journal article is published.        -->
+<!--                                                               -->
+<!-- CONTAINS:   1. Default values for attribute lists             -->
+<!--             2. Journal metadata content model                 -->
+<!--             3. Journal metadata elements in the order used in -->
+<!--                the journal metadata element                   -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+                        
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  5. PUBLISHER - Moved element here from this module to the
+     %common.ent; module since Book DTD also needed it and was 
+     not including this module. 
+     
+  4. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now,
+     -  %journal-meta-model; 
+
+  3. CUSTOM METADATA - Added the new <custom-meta> element, its
+     components, and its wrapper. This element is used to insert
+     name/value pairs for metadata elements that are in source
+     material but were never envisioned by this DTD. Allowed this
+     element at the end of <journal-meta>.
+
+  2. FPI - Updated public identifier to "v2.0 20040830" 
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+     
+  1. Created element <journal-title> and added it to parameter 
+     entity %journal-meta-model;  
+     Rationale: To include full name of journal as part of 
+     journal metadata.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                           -%just-rendition;                       -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE LISTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    JOURNAL IDENTIFIER ATTRIBUTES              -->
+<!--                    Attribute list for journal identifier 
+                        <journal-id> element                       -->
+<!--                    Indicates whose identifier this is, for
+                        example, "pub-id" for a publisher's
+                        identifier or "pmc" for PubMed Central.
+                        Suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Identifier assigned by a data
+                                 aggregator
+                          doi    Digital Object Identifier for the
+                                 entire journal, not just for the
+                                 article (rare)
+                          index  Identifier assigned by an
+                                 abstracting or indexing service
+                          pmc    Identifier assigned by PubMed Central
+                                 for example, the pmc journal 
+                                 abbreviation such as "pnas", "mbc", 
+                                 "nar", "molcellb", which may be the 
+                                 same as the abbreviated journal 
+                                 title
+                          publisher-id 
+                                 Identifier assigned by the content
+                                 publisher, for example, "MOLEC", 
+                                 "MOLCEL"
+                          nlm-ta Identifier assigned by the 
+                                 PubMed/Medline, and is typically
+                                 the journal abbreviation, for 
+                                 example, "Mol Biol Cell", "Nucleic
+                                 Acids Res", which may be the
+                                 same as the abbreviated journal 
+                                 title.                            -->
+<!ENTITY %  journal-id-atts
+             "journal-id-type  
+                        CDATA                            #IMPLIED  " > 
+
+
+<!--         abbrev-type  
+                        The "type" attribute holds the name of the
+                        authority (if known) that defined the
+                        abbreviation.  For example, "medline" for
+                        the medline abbreviation, "publisher" for
+                        a publisher's abbreviation, etc.           -->
+
+
+<!--                    ABBREVIATED JOURNAL TITLE ATTRIBUTES       -->
+<!--                    Attribute list for Abbreviated Journal Title 
+                        <abbrev-journal-title> element             -->
+<!ENTITY %  abbrev-journal-title-atts
+             "abbrev-type  
+                        CDATA                              #IMPLIED" >
+
+
+<!-- ============================================================= -->
+<!--                    JOURNAL METADATA                           -->
+<!-- ============================================================= -->
+
+
+<!--                    JOURNAL METADATA MODEL                     -->
+<!--                    Content model for the journal metadata
+                        element <journal-meta>                     -->
+<!ENTITY % journal-meta-model  
+                        "(journal-id*, journal-title*, 
+                          abbrev-journal-title*, issn*, 
+                          publisher?, notes?, custom-meta-wrap?)"    >
+
+
+<!--                    JOURNAL METADATA                           -->
+<!--                    Metadata that identifies the journal in which
+                        the article was published                  -->
+<!ELEMENT  journal-meta %journal-meta-model;                         >
+  
+
+<!--ELEM   notes        Defined in %common.ent"                    -->
+<!--ELEM   issn         Defined in %common.ent"                    -->
+
+
+<!-- ============================================================= -->
+<!--                    JOURNAL METADATA ELEMENTS                  -->
+<!-- ============================================================= -->
+
+
+<!--                    JOURNAL IDENTIFIER                         -->
+<!--                    Short code that represents the journal; used
+                        as an alternative to or short form of the
+                        journal title; used for identification of 
+                        the journal domain.
+                        Authoring Note (PMC-only):
+                        The PMC identifiers come from an 
+                        authorized list, so that each journal 
+                        code is unique in the PMC system. The PMC 
+                        identifier is the PMC short abbreviation of 
+                        the journal title, used to identify the
+                        journal domain.                            -->
+<!ELEMENT  journal-id   (#PCDATA)                                    >
+<!--         journal-id-type   
+                        Indicates whose identifier this is, for
+                        example, "pub-id" for a publisher's
+                        identifier or "pmc" for PubMed Central.
+                        Suggested values include:
+                          archive Identifier assigned by an archive
+                                  or other repository
+                          aggregator
+                                 Identifier assigned by a data
+                                 aggregator
+                          doi    Digital Object Identifier for the
+                                 entire journal, not just for the
+                                 article (rare)
+                          index  Identifier assigned by an
+                                 abstracting or indexing service
+                          pmc    Identifier assigned by PubMed Central
+                                 for example, the pmc journal 
+                                 abbreviation such as "pnas", "mbc", 
+                                 "nar", "molcellb", which may be the 
+                                 same as the abbreviated journal 
+                                 title
+                          publisher-id 
+                                 Identifier assigned by the content
+                                 publisher, for example, "MOLEC", 
+                                 "MOLCEL"
+                          nlm-ta Identifier assigned by the 
+                                 PubMed/Medline, and is typically
+                                 the journal abbreviation, for 
+                                 example, "Mol Biol Cell", "Nucleic
+                                 Acids Res", which may be the
+                                 same as the abbreviated journal 
+                                 title.                            -->
+<!ATTLIST  journal-id
+             %journal-id-atts;                                       >
+
+
+<!--                    JOURNAL TITLE ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <journal-title>
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % journal-title-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    JOURNAL TITLE (FULL)                       -->
+<!--                    The title of the journal in which the
+                        article is published.                      -->
+<!ELEMENT  journal-title 
+                        (#PCDATA %journal-title-elements;)*          >
+
+
+<!--                    ABBREVIATED JOURNAL TITLE ELEMENTS         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <abbrev-journal-title> 
+                        Design Note: This PE begins with an OR
+                        bar because %just-rendition; begins with an
+                        OR bar.                                    -->
+<!ENTITY % abbrev-journal-title-elements
+                        "%just-rendition;"                           >
+
+
+<!--                    ABBREVIATED JOURNAL TITLE                  -->
+<!--                    A short form of the title of the journal
+                        in which the article is published.         -->
+<!ELEMENT  abbrev-journal-title 
+                        (#PCDATA %abbrev-journal-title-elements;)*   >
+<!--         abbrev-type  
+                        The "type" attribute holds the name of the
+                        authority (if known) that defined the
+                        abbreviation.  For example, "medline" for
+                        the medline abbreviation, "publisher" for
+                        a publisher's abbreviation, etc.           -->
+<!ATTLIST  abbrev-journal-title
+             %abbrev-journal-title-atts;                             >
+
+<!--ELEM   publisher    Defined in %common.ent"                    -->
+<!--ELEM   publisher-name      
+                        Defined in %common.ent"                    -->
+<!--ELEM   publisher-loc
+                        Defined in %common.ent"                    -->
+
+
+<!-- ================== End Journal Metadata Elements  =========== -->
diff --git a/dtd/link.ent b/dtd/link.ent
new file mode 100644
index 0000000..9ae3bc7
--- /dev/null
+++ b/dtd/link.ent
@@ -0,0 +1,510 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Link Element Classes                              -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Link Class Elements v2.0 20040830//EN"
+     Delivered as file "link.ent"                                  -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements in the link class. These are   --> 
+<!--             elements that are links (internal or external)    -->
+<!--             by definition, such as URLs <uri> and             -->
+<!--             Cross(X)-references <xref>.                       -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definitions of the link classes        -->
+<!--             2) Default definitions for attribute values       -->
+<!--             3) Default definitions for attribute lists        -->
+<!--             4) Models for the link class elements, first      -->
+<!--             internal links then external links                -->
+<!--             (alphabetically)                                  -->
+<!--                                                               -->
+<!--             (Note: Links make their links using the XLink     -->
+<!--             global attributes. Many elements besides          -->
+<!--             explicit links may be made into links using       -->
+<!--             these attributes. Such elements are defined in    -->
+<!--             the module appropriate to their use and are not   -->
+<!--             listed here.)                                     -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+          
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  9. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now,
+     -  %fn-model; 
+
+  8. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+
+  7. FOOTNOTE
+        - Made model into a Parameter Entity
+        - Added optional <label> to the beginning of the model,
+          before the paragraphs
+
+  6. To correct potential classing problems, used the following
+     new Parameter Entities:
+        - %just-para.class; used in <fn> (%fn-model; uses 
+          %just-para.class;)
+
+  5. Updated public identifier to "v2.0 20040830"
+
+     =============================================================
+     Version 1.1                         (TRG/BTU) v1.1 (2003-11-01)
+
+  4. Added "alternate-form-of", "content-type", and ID attributes 
+     to <inline-supplementary-material> (by modifying 
+     %inline-supplementary-material-atts;)
+     Rationale: To provide parallelism between attributes for 
+     <supplementary-material> and <inline-supplementary-material>
+
+  3. Added "mimetype" and "mime-subtype" attributes to 
+     <inline-supplementary-material> (as part of adding these 
+     attributes to all graphic and multi-media elements)
+
+  2. Added ID attribute information to <xref> (by modifying
+     parameter entity %xref-atts;)
+     Rationale: Provide unique identifier so <xref>
+     element can be linked to (creating two-way link). 
+
+  1. Added an optional "target-type" attribute to element 
+     <target>.  Rationale: To identify the reason for this target.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                          %access.class;
+                          %emphasis.class;
+                          %link-elements;
+                          %might-link-atts;
+                          %subsup.class;
+                                                                   -->
+                                                                   
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE VALUES              -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFAULT TYPE OF CROSS(X)-REFERENCE         -->
+<!--                    Used to say to what the reference is pointing.
+                        May be used for type-specific processing or
+                        validation. Values are, for example:
+                        Affiliation "aff", Figure "fig", and
+                        Bibliographic ref (to a Citation <citation> or
+                        to a Reference Item <ref>) "bibr"          -->
+<!ENTITY % ref-types    "aff | app | author-notes | bibr | 
+                         boxed-text | chem | contrib | corresp | 
+                         disp-formula | fig | fn | kwd | list | 
+                         plate | scheme | sec | statement | 
+                         supplementary-material | 
+                         table | table-fn | 
+                         other"                                      >
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE LISTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    FOOTNOTE ATTRIBUTES                        -->
+<!--                    Attribute list for Footnote element        -->
+<!ENTITY %  fn-atts
+             "id         ID                                #IMPLIED  
+              symbol     CDATA                             #IMPLIED 
+              fn-type    CDATA                             #IMPLIED  
+              xml:lang   NMTOKEN                           #IMPLIED" > 
+
+
+<!--                    X(CROSS) REFERENCE ATTRIBUTES              -->
+<!--                    Attribute list for cross references        -->
+<!ENTITY %  xref-atts
+             "id         ID                               #IMPLIED
+              ref-type   (%ref-types;)                    #IMPLIED 
+              rid        IDREFS                           #IMPLIED"  >
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL              -->
+<!--                    Attribute list for inline supplementary 
+                        material                                   -->
+<!ENTITY %  inline-supplementary-material-atts
+             "alternate-form-of
+                        IDREF                             #IMPLIED
+              content-type
+                        CDATA                             #IMPLIED
+              id        ID                                #IMPLIED
+              %might-link-atts;                                    
+              mimetype  CDATA                             #IMPLIED 
+              mime-subtype
+                        CDATA                             #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    INTERNAL LINKS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    FOOTNOTE MODEL                             -->
+<!--                    Content model for Footnote <fn>            -->
+<!ENTITY % fn-model     "((%label.class;)?, (%just-para.class;)+ )"  > 
+
+
+
+<!--                    FOOTNOTE                                   -->
+<!--                    Additional information concerning material in
+                        a particular location in the text. This
+                        material is not considered to be part of the 
+                        body of the text, but in addition to or a 
+                        commentary on the body. Such material may be 
+                        displayed at the bottom of a printed page, 
+                        onscreen in a separate pop-up window, or in a
+                        list at the end of an article.
+                        Remarks: A reference (pointer) to a
+                        Footnote <fn> is made with the X(Cross)
+                        Reference element.
+                        The language attribute may be used to note
+                        a footnote that is not in the same language
+                        as the original document, for example, a
+                        Latin or Greek footnote for a document in 
+                        English.                                   -->
+<!ELEMENT  fn           %fn-model;                                   >
+<!--         id         Unique identifier for the element. A cross-
+                        reference will point to this ID.
+             symbol     If the symbol that was used in the original
+                        display to identify the specific footnote
+                        is to be preserved, this is the attribute
+                        where it may be stored. One might store the
+                        symbol to disambiguate mistagged cases, for
+                        example, in which the author has stated
+                        "see footnote b" or "see footnote 14"  in
+                        the text but the mention of the footnote has 
+                        not been tagged as a cross references.
+             fn-type    Type of footnote, for those footnotes that
+                        point to a particular type of information 
+                        and that type is known, this attribute is
+                        intended as a way to preserve that
+                        knowledge.  For example, some footnotes
+                        point to or are used for the purpose of
+                        recording:
+                          abbr    Abbreviations
+                          com     Communicated-by information
+                          con     Contributed-by information
+                          conflict
+                                  Conflict of interest statements
+                          equal   Contributed to the creation of
+                                  the document equally
+                          corresp For use when the corresponding
+                                  author information is not 
+                                  identified separately, but is 
+                                  merely a footnote
+                          current-aff
+                                  Contributor's current affiliation
+                          deceased
+                                  Person has died since article was
+                                  written
+                          edited-by
+                                  Contributor has the role of an
+                                  editor
+                          financial-disclosure
+                                  Statement of funding or denial
+                                  of funds received in support of
+                                  the research on which this article
+                                  is based
+                          on-leave
+                                  Contributor is on sabbatical or
+                                  other leave of absence
+                          participating-researchers
+                                  Contributor was a researcher for
+                                  this article
+                          present-address
+                                  Contributor's current address
+                          presented-at
+                                  Conference, colloquium, or other
+                                  occasion at which this paper
+                                  was presented
+                          presented-by
+                                  Contributor who presented this
+                                  material
+                          previously-at
+                                  Contributor's previous location
+                                  or affiliation
+                          reprint Method or place to obtain reprints,
+                                  typically the name and address of
+                                  a person from whom reprints can be
+                                  requested
+                          study-group-members
+                                  Contributor was a member of the
+                                  study group for this research
+                          supplementary-material
+                                  Points to or describes
+                                  supplementary material for this
+                                  article
+                          supported-by
+                                  The research upon which this
+                                  article is based was supported by
+                          other    Not in the above list of
+                                   footnote types
+            xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  fn
+             %fn-atts;                                               > 
+
+
+<!--                    TARGET ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <target>  
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %link-elements; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % target-elements
+                        "%link-elements;"                            >
+
+
+<!--                    TARGET OF AN INTERNAL LINK                 -->
+<!--                    May be placed anywhere within textual 
+                        material such as a paragraph to provide a
+                        location (anchor) to which a cross reference
+                        can point                                  -->
+<!ELEMENT  target       (#PCDATA %target-elements;)*                 >
+<!--         id         Unique identifier so the element may be
+                        referenced
+             target-type
+                        Indicates the kind of <target> that has 
+                        been created, i.e., describes the reason 
+                        why some portion of text has been 
+                        designated for cross-references purposes   -->
+<!ATTLIST  target
+             id         ID                                #IMPLIED
+             target-type
+                        CDATA                             #REQUIRED  >
+
+
+<!--                    X(CROSS) REFERENCE ELEMENTS                -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <xref>  
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %link-elements; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % xref-elements
+                        "%link-elements;"                            >
+
+  
+<!--                    X(CROSS) REFERENCE                         -->
+<!--                    Used for any kind of internal article
+                        referencing. The content of the reference 
+                        (if present) will be displayed as the link.
+                        This element may be used to anything that
+                        has an "id".  The "ref-type" attribute says
+                        what the reference is pointing to.         -->
+<!ELEMENT  xref         (#PCDATA %xref-elements;)*                   >
+<!--         id         Unique identifier so the element may be
+                        referenced (creating two-way link)
+             ref-types  Used to say to what the reference is pointing.
+                        May be used for type-specific processing or
+                        validation.  
+                        Values are:
+                          aff       Affiliation
+                          app       Appendix
+                          author-note
+                                    Author Note
+                          bibr      Bibliographic ref (to 
+                                    a Citation <citation>
+                                    or to a Reference 
+                                    Item <ref>) 
+                          boxed-text
+                                    Textbox or sidebar  
+                          chem      Chemical Structure 
+                                    Wrapper or Chemical
+                                    Structure
+                          contrib   Contributor
+                          corresp   Corresponding Author
+                          disp-formula        
+                                    Display Formula 
+                          fig       Figure or fig-group
+                          kwd       Keyword
+                          fn        Footnote
+                          list      List 
+                          plate     Plate
+                          scheme    Scheme
+                          sec       Section
+                          statement Statement
+                          supplementary-material  
+                                    Supplementary Information
+                          table     Table Group or Table Wrapper              
+                          table-fn  Table foot Note
+                                    A <fn> that is found within a
+                                    <table-wrap> element and that
+                                    should be displayed with the 
+                                    table rather than, for example, 
+                                    at the bottom of the page or 
+                                    in a window that does not contain
+                                    the table.
+                          other     Not listed above               
+             rid        Points to the identifier of a bibliographic
+                        reference, boxed-text, figure, footnote, 
+                        table, etc. (creating a link)              -->
+<!ATTLIST  xref
+             %xref-atts;                                             >
+
+
+<!-- ============================================================= -->
+<!--                    EXTERNAL LINKS                             -->
+<!-- ============================================================= -->
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL ELEMENTS     -->
+<!--                    Elements for use in the 
+                        <inline-supplementary-material> element    -->
+<!ENTITY % inline-supplementary-material-elements 
+                        "| %access.class; | %address-link.class; | 
+                         %emphasis.class; | %subsup.class;"          > 
+
+
+<!--                    INLINE SUPPLEMENTARY MATERIAL              -->
+<!--                    An in-text link to an external file that
+                        provides supplementary information for
+                        the document, for example, an audio clip   -->
+<!ELEMENT  inline-supplementary-material
+                        (#PCDATA 
+                         %inline-supplementary-material-elements;)*  >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             id         Unique identifier so the element may be
+                        referenced                              
+             mimetype   The mime type of the supplementary material
+                        Authoring Note: This attribute might be
+                        required when creating new articles.       
+             mime-subtype   
+                        The subtype of the supplementary material 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->
+<!ATTLIST  inline-supplementary-material
+             %inline-supplementary-material-atts;                    >
+
+
+<!-- ================== End Link Class Module ==================== -->
diff --git a/dtd/list.ent b/dtd/list.ent
new file mode 100644
index 0000000..9428b0d
--- /dev/null
+++ b/dtd/list.ent
@@ -0,0 +1,465 @@
+<!-- ============================================================= -->
+<!--  MODULE:    List Element Classes                              -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite List Class Elements v2.0 20040830//EN"
+     Delivered as file "list.ent"                                  -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements in the list class. These are   -->
+<!--             all lists except the lists of bibliographic       -->
+<!--             references (citations). Lists are considered      -->
+<!--             to be composed of items.                          -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definition of the list class           -->
+<!--             2) Definition List attributes                     -->
+<!--             3) Definition Lists <def-list>                    -->
+<!--             4) Ordinary lists (number, bullet, plain) <l>     -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  8. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Made all the model over-rides consistent. Some included
+     the outer parentheses, some did not. They all do now,
+     as this is the most flexible system, allowing for
+     #PCDATA, mixed, or element content. (This is in direct
+     contrast to the "-element" suffixed models, which are
+     designed to prohibit element content and permit only
+     #PCDATA or mixed content.)
+     -  %def-item-model;
+     -  %def-list-model;
+     -  %list-model;
+     -  %list-item-model;
+
+  7. PARAMETER ENTITY RENAMING
+     a. ELEMENTS CHANGED TO MODELS
+        ### Customization Alert ###
+        There is a DTD naming convention that PEs which contain full
+        content models are named with a "-model" suffix, in contrast 
+        to OR-groups of elements which are added to #PCDATA 
+        within a specific content model that are suffixed "-elements". 
+        The few Parameter Entities that broke that pattern and were 
+        renamed:
+        - %def-item-elements;  ==> %def-item-model;       
+        - %list-item-elements; ==> %list-item-model;       
+      
+     b. RENAME EXISTING CLASSES
+        ### Customization Alert ###
+        Some classes did not have the ".class" suffix. Changed the 
+        names to add the class suffix:
+        - %block-math.class; (used in %term-elements;)
+
+  6. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+  
+  5. Updated public identifier to "v2.0 20040830"
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  4. Added ID attribute to element <def-item>. 
+     Rationale: Provide unique identifier so <def-item> element 
+     can be linked to. 
+
+  3. Added element <label> to parameter entities %def-item-elements;
+     and %list-item-elements; (now named %list-item-model;)
+     Rationale: To provide <label> when needed for format 
+     over-ride.
+
+  2. Added new parameter entity %list-item-elements (now named
+     %list-item-model;) to contain contents of <list-item>
+     Rationale: In order to distinguish between models used by
+     the Archiving DTD and the Publishing DTD, it was necessary 
+     to create a parameter entity that could be overridden.
+ 
+  1. Added new parameter entity %def-item-elements to contain 
+     contents of <def-item>
+     Rationale: In order to distinguish between models used by
+     the Archiving DTD and the Publishing DTD, it was necessary 
+     to create a parameter entity that could be overridden.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                          - %block-math.class;
+                          - %simple-display.class;
+                          - %simple-phrase;                            
+                                                                   -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULT PE FOR ATTRIBUTE LISTS             -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFAULT LIST CLASS ATTRIBUTES              -->
+<!--                    Default attribute lists to be used for most
+                        of the types of lists.                     -->
+<!ENTITY % list-atts
+             "id        CDATA                              #IMPLIED 
+              list-type CDATA                              #IMPLIED 
+              prefix-word
+                        CDATA                              #IMPLIED
+              list-content
+                        CDATA                              #IMPLIED" >
+
+
+<!--                    DEFAULT DEFINITION LIST ATTRIBUTES         -->
+<!--                    Default attribute lists to be used for 
+                        Definition (2-part) lists                  -->
+<!ENTITY % def-list-atts
+             ""                                                      >
+
+
+<!-- ============================================================= -->
+<!--                    DEFINITION LIST                            -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFINITION LIST MODEL                      -->
+<!--                    Content model for the <def-list> element   -->
+<!ENTITY % def-list-model   
+                        "(label?, title?, term-head?, def-head?, 
+                          def-item*, def-list*)"                     > 
+
+
+<!--                    DEFINITION LIST                            -->
+<!ELEMENT  def-list     %def-list-model;                             >
+<!--         id         A unique identifier so that the list
+                        may be referenced by an <xref> element   
+             list-type  List prefix types.  Type describes the
+                        type of prefix character to be used before
+                        each list item:
+                          order - Ordered list. Prefix character is
+                            a number or a letter, depending on
+                            style
+                          bullet - Unordered list. Prefix character
+                            is a bullet, dash, or other symbol
+                          alpha-lower - Ordered list. Prefix 
+                             character is a lowercase alphabetical 
+                             character
+                          alpha-upper - Ordered list. Prefix 
+                             character is an uppercase alphabetical 
+                             character
+                          roman-lower  - Ordered list. Prefix 
+                             character is a lowercase roman 
+                             numeral
+                          roman-upper  - Ordered list. Prefix 
+                             character is an uppercase roman 
+                             numeral
+                          simple - Simple or plain list (no prefix
+                              character)
+             prefix-word
+                        Holds a word, such as "Step" or "Process"
+                        that is to be added to each item of a list.
+                        The word is in addition to any prefix
+                        characters such as numbers or bullets,
+                        and typically follows the prefix character.
+                        For example, A list type of "1" and a
+                        prefix word of "Step", would produce:
+                        "Step 1. aaaa", "Step 2. bbbb", etc.
+                        Note that the word is "Step" and not "Step ".
+                        The odd man out is the unordered list,
+                        type "2", which is the only case in which
+                        the prefix character would precede the 
+                        prefix word: - Step   - Step, but the
+                        combination is not usually sensible.       
+             list-content
+                        There are some list models in use in journal
+                        DTDs, where a specific named list has been
+                        created instead of using <list> or <def-list>.
+                        The "list content" attribute should be used 
+                        to preserve the semantic information 
+                        concerning such lists types.  Potential 
+                        values include: "procedure", "where-list" 
+                        (used in equations), "synonymy", 
+                        "compound-info", "algorithm", "notation",
+                        etc. For example, if a list were tagged as
+                              <procedure>
+                              <list-item>...</list-item>
+                              </procedure>
+                        that tagging could be preserved as:
+                              <list list-content="procedure">
+                              <list-item>...</list-item>
+                              </list>                              -->
+<!ATTLIST  def-list
+             %list-atts;                                             
+             %def-list-atts;                                         >
+
+
+<!--                    DEFINITION LIST HEAD ELEMENTS              -->
+<!--                    Elements for use in the <def-list> heading
+                        elements <term-head> and <def-head>. 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % def-list-head-elements
+                        "%simple-phrase;"                            >
+                         
+                         
+<!--                    DEFINITION LIST: TERM HEAD                 -->
+<!--                    Title over the first (term) column of a
+                        two-part list                              -->
+<!ELEMENT  term-head    (#PCDATA %def-list-head-elements;)*          >
+
+
+<!--                    DEFINITION LIST: DEFINITION HEAD           -->
+<!--                    Title over the second (definition) column 
+                        of a two-part list                         -->
+<!ELEMENT  def-head     (#PCDATA %def-list-head-elements;)*          >
+
+
+<!--                    DEFINITION LIST: DEFINITION ITEM MODEL     -->
+<!--                    The content model of a <def-item>          -->
+<!ENTITY % def-item-model 
+                        "(label?, term, def*)"                       >
+                         
+                         
+<!--                    DEFINITION LIST: DEFINITION ITEM           -->
+<!--                    A term and definition pair inside a
+                        definition or two-part list               
+                        of a two-part list 
+                        Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->
+<!ELEMENT  def-item     %def-item-model;                             >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  def-item                                
+             id         ID                                 #IMPLIED  >
+             
+
+<!--ELEM   def          Defined in %common.ent;                    -->
+
+
+<!--                    DEFINITION LIST: TERM ELEMENTS             -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <term>. 
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % term-elements
+                        "%simple-phrase; | %block-math.class; | 
+                         %simple-display.class;"                     >
+
+
+<!--                    DEFINITION LIST: TERM                      -->
+<!--                    The word, phrase, picture, or other noun
+                        being defined or description that occupies
+                        the first column of a definition or 2-part
+                        list and is the subject of the definition or
+                        description.                               -->
+<!ELEMENT  term         (#PCDATA %term-elements;)*                   >
+<!--         id         Unique identifier so the element may be
+                        referenced 
+             rid        Points to the identifier of a definition,
+                        so that a term and definition may be linked
+                                                                   -->
+<!ATTLIST  term
+             rid        IDREFS                             #IMPLIED 
+             id         ID                                 #IMPLIED  >
+
+
+<!-- ============================================================= -->
+<!--                    LIST ELEMENTS (PARAGRAPH-LEVEL ELEMENTS)   -->
+<!-- ============================================================= -->
+
+
+<!--                    LIST MODEL                                 -->
+<!--                    Content model for the <list> element       -->
+<!ENTITY % list-model   "(label?, title?, list-item+)"               >
+
+
+<!--                    LIST                                       -->
+<!ELEMENT  list         %list-model;                                 >
+<!--         id         A unique identifier so that the list
+                        may be referenced by an <xref> element   
+             list-type  List prefix types.  Type describes the
+                        type of prefix character to be used before
+                        each list item:
+                          order - Ordered list. Prefix character is
+                            a number or a letter, depending on
+                            style
+                          bullet - Unordered list. Prefix character
+                            is a bullet, dash, or other symbol
+                          alpha-lower - Ordered list. Prefix 
+                             character is a lowercase alphabetical 
+                             character
+                          alpha-upper - Ordered list. Prefix 
+                             character is an uppercase alphabetical 
+                             character
+                          roman-lower  - Ordered list. Prefix 
+                             character is a lowercase roman 
+                             numeral
+                          roman-upper  - Ordered list. Prefix 
+                             character is an uppercase roman 
+                             numeral
+                          simple - simple or plain list (no prefix
+                              character)
+             prefix-word
+                        Holds a word, such as "Step" or "Process"
+                        that is to be added to each item of a list.
+                        The word is in addition to any prefix
+                        characters such as numbers or bullets,
+                        and typically follows the prefix character.
+                        For example, a list type of "1" and a
+                        prefix word of "Step", would produce:
+                        "Step 1. aaaa", "Step 2. bbbb", etc.
+                        Note that the word is "Step" and not "Step ".
+                        The odd man out is the unordered list,
+                        type "2", which is the only case in which
+                        the prefix character would precede the 
+                        prefix word: - Step   - Step, but the
+                        combination is not usually sensible.       
+             list-content
+                        There are some list models in use in journal
+                        DTDs, where a specific named list has been
+                        created instead of using <list> or <def-list>.
+                        The "list content" attribute should be used 
+                        to preserve the semantic information 
+                        concerning such lists types.  Potential 
+                        values include: "procedure", "where-list" 
+                        (used in equations), "synonymy", 
+                        "compound-info", "algorithm", "notation",
+                        etc. For example, if a list were tagged as
+                              <procedure>
+                              <list-item>...</list-item>
+                              </procedure>
+                        that tagging could be preserved as:
+                             <list list-content="procedure">
+                              <list-item>...</list-item>
+                              </list>                              -->
+<!ATTLIST  list
+             %list-atts;                                             >
+
+
+<!--                    LIST ITEM ELEMENTS                         -->
+<!--                    The content model of a <list-item>.        -->
+<!ENTITY % list-item-model 
+                        "(label?, (p | %list.class;)+)"              >
+                         
+ 
+<!--                    LIST ITEM                                  -->
+<!--                    Authoring Note:  While this element 
+                        contains an optional Label element, the 
+                        Label element should be included only in 
+                        those circumstances where a formatting 
+                        override is needed; Label should NOT 
+                        be used in the ordinary course of 
+                        tagging.                                   -->
+<!ELEMENT  list-item    %list-item-model;                            >
+<!--         id         A unique identifier so that the list item
+                        may be referenced by an <xref> element     -->
+<!ATTLIST  list-item
+             id         CDATA                              #IMPLIED  >
+
+
+<!-- ================== End List Class Module ==================== -->
diff --git a/dtd/math.ent b/dtd/math.ent
new file mode 100644
index 0000000..a501866
--- /dev/null
+++ b/dtd/math.ent
@@ -0,0 +1,329 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Math Element Classes                              -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Math Class Elements v2.0 20040830//EN"
+     Delivered as file "math.ent"                                  -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names all elements in the math classes            -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definition of the math classes         -->
+<!--             2) Inline formula <inline-formula>                -->
+<!--             3) Display Formula <disp-formula>                 -->
+<!--             4) TeX Math Equation <tex-math>                   -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  7. INLINE FORMULA/DISPLAY FORMULA
+     ### Customization Alert ###
+     a. Inline Formula
+        - Made the content model into a separate parameter entity
+          %inline-formula-model;, which uses the Parameter
+          Entity %inline-formula-elements;
+        - Changed the Parameter Entities and models to use the 
+          OR-bar-first mechanism. In other words: Changed 
+          "%all-phrase;" to "| %all-phrase;" and removed the
+          OR bar following #PCDATA in the content model to match.
+        - Added %inline-math.class; to the model
+     b. Display Formula - Similar changes made:
+        - added new content model PE %disp-formula-model; 
+        - changed %disp-formula-elements; and %disp-formula-model;
+          to use the OR-bar-first
+        - Added %inline-math.class;
+
+  5. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+  
+  4. %tex-math-atts; - Added the value "LaTeX" to the "notation"
+     attribute
+  
+  3. Updated public identifier to "v2.0 20040830"         
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  2. Added attribute "alternate-form-of" to:
+       -  <disp-formula> (by modifying parameter entity 
+          %disp-formula-atts;)
+       -  <inline-formula>
+       -  <tex-math> (by modifying parameter entity 
+          %tex-math-atts;)
+     Rationale: Where multiple formats of an item (e.g., graphic 
+     file, media object, chemical structure) are available, this 
+     attribute indicates that a format is a secondary one and 
+     provides a link to the primary format, so that only one 
+     format of an item is displayed.
+     
+  1. Added attribute "id" to element <inline-formula> 
+     Rationale: To allow an <inline-formula> to be linked to, 
+     especially by alternate forms of the same formula (which will
+     use the "alternate-form-of" attribute to link to the primary)
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                          %access.class;
+                          %break.class;
+                          %emphasis.class;
+                          %inline-display.class;
+                          %inline-formula-elements;
+                          %label.class;
+                          %math.class;
+                          %simple-display.class;
+                          %subsup.class;
+                                                                   -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+                                                                
+                                                                 
+<!--                    DISPLAY FORMULA ATTRIBUTES                 -->
+<!--                    Attributes for the <disp-formula> element  -->
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ENTITY % disp-formula-atts
+            "alternate-form-of
+                        IDREF                              #IMPLIED
+             id         ID                                 #IMPLIED" >
+                                                                
+                                                                 
+<!--                    TEX MATH ATTRIBUTES                        -->
+<!--                    Attributes for the <disp-formula> element  -->
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so the element may be
+                        referenced
+             version    Which version of TeX used
+             notation   Says that the content of this element will
+                        be in TeX and needs to be surrounded by
+                        a CDATA section.                           -->
+<!ENTITY % tex-math-atts                                  
+            "alternate-form-of
+                        IDREF                             #IMPLIED
+             id         CDATA                             #IMPLIED
+             notation   NOTATION (LaTeX | tex | TEX | TeX)
+                                                          #IMPLIED
+             version    CDATA                             #IMPLIED"  >
+
+
+<!-- ============================================================= -->
+<!--                    MATH ELEMENTS (PARAGRAPH LEVEL)            -->
+<!-- ============================================================= -->
+
+
+<!--                    FORMULA, INLINE ELEMENTS                   -->
+<!--                    Elements for use in the <inline-formula> 
+                        element                                    -->
+<!ENTITY % inline-formula-elements   
+                        "| %emphasis.class; | %inline-display.class; |
+                         %inline-math.class; |
+                         %math.class; | %subsup.class;"              > 
+
+
+<!--                    FORMULA, INLINE MODEL                      -->
+<!--                    Content model for an <inline-formula>      -->
+<!ENTITY % inline-formula-model   
+                        "(#PCDATA %inline-formula-elements;)*"       > 
+
+
+<!--                    FORMULA, INLINE                            -->
+<!--                    Inline element for a mathematical
+                        equation, expression, or formula           -->
+<!ELEMENT  inline-formula            
+                        %inline-formula-model;                       >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so an inline-formula
+                        can be referenced                          -->
+<!ATTLIST  inline-formula
+             alternate-form-of
+                        IDREF                              #IMPLIED
+             id         ID                                 #IMPLIED  >
+
+
+<!--                    DISPLAY FORMULA ELEMENTS                   -->
+<!--                    Elements for use in the <disp-formula> 
+                        element                                    -->
+<!ENTITY % disp-formula-elements  
+                        "| %access.class; | %address-link.class; |
+                         %break.class; | %emphasis.class; | 
+                         %inline-display.class; |
+                         %inline-math.class; | 
+                         %label.class; | %math.class; | 
+                         %simple-display.class; | %subsup.class;"    > 
+
+
+<!--                    FORMULA, DISPLAY MODEL                     -->
+<!--                    Content model for an <disp-formula>        -->
+<!ENTITY % disp-formula-model   
+                        "(#PCDATA %disp-formula-elements;)*"         > 
+
+
+<!--                    FORMULA, DISPLAY                           -->
+<!--                    Block-level (callout) element for a 
+                        mathematical equation, expression, or 
+                        formula.  The characters representing the
+                        equation may be present, or the equation
+                        could be a graphic.                        -->
+<!ELEMENT  disp-formula %disp-formula-model;                         >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so the element may be
+                        referenced                                 -->
+<!ATTLIST  disp-formula
+             %disp-formula-atts;                                     >
+
+
+<!--                    TEX MATH EQUATION                          -->
+<!--                    Used to hold encoded math, expressed in TeX-->
+<!ELEMENT  tex-math      (#PCDATA)                                   >
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an
+                        item is displayed.
+             id         Unique identifier so the element may be
+                        referenced
+             version    Which version of TeX or LaTeX used
+             notation   Says that the content of this element will
+                        be in TeX and needs to be surrounded by
+                        a CDATA section.                           -->
+<!ATTLIST  tex-math                                  
+             %tex-math-atts;                                         >
+
+
+<!-- ================== End List Class Module ==================== -->
diff --git a/dtd/mathml-in-pubmed.mod b/dtd/mathml-in-pubmed.mod
new file mode 100644
index 0000000..ce95673
--- /dev/null
+++ b/dtd/mathml-in-pubmed.mod
@@ -0,0 +1,151 @@
+<!-- ============================================================= -->
+<!--                     MATHML 3.0 MODULES                        -->
+<!-- ============================================================= -->
+<!--                    MATHML 3.0 QUALIFIED NAMES                 -->
+<!ENTITY % mathml-qname.mod
+                        PUBLIC
+"-//W3C//ENTITIES MathML 3.0 Qualified Names 1.0//EN"
+"mathml3-qname1.mod"                                                 >
+
+
+<!--                    MATHML 3.0 DTD                             -->
+<!ENTITY % mathml.dtd   PUBLIC
+"-//W3C//DTD MathML 3.0//EN" 
+"mathml3.dtd"                                                        >
+
+
+<!--                    MATHML 3.0 EXTRA ENTITIES                  -->
+<!ENTITY % ent-mmlextra
+                        PUBLIC
+"-//W3C//ENTITIES Extra for MathML 3.0//EN" 
+"mathml/mmlextra.ent"                                                >
+
+
+<!--                    MATHML 3.0 ALIASES                         -->
+<!ENTITY % ent-mmlalias
+                        PUBLIC
+"-//W3C//ENTITIES Aliases for MathML 3.0//EN" 
+"mathml/mmlalias.ent"                                                >
+
+<!--                    NAMED CHARACTERS                           -->
+<!ENTITY % isobox PUBLIC "-//W3C//ENTITIES Box and Line Drawing//EN" "iso8879/isobox.ent">
+<!ENTITY % isocyr1 PUBLIC "-//W3C//ENTITIES Russian Cyrillic//EN" "iso8879/isocyr1.ent">
+<!ENTITY % isocyr2 PUBLIC "-//W3C//ENTITIES Non-Russian Cyrillic//EN" "iso8879/isocyr2.ent">
+<!ENTITY % isodia PUBLIC "-//W3C//ENTITIES Diacritical Marks//EN" "iso8879/isodia.ent">
+<!ENTITY % isolat1 PUBLIC "-//W3C//ENTITIES Added Latin 1//EN" "iso8879/isolat1.ent">
+<!ENTITY % isolat2 PUBLIC "-//W3C//ENTITIES Added Latin 2//EN" "iso8879/isolat2.ent">
+<!ENTITY % isonum PUBLIC "-//W3C//ENTITIES Numeric and Special Graphic//EN" "iso8879/isonum.ent">
+<!ENTITY % isopub PUBLIC "-//W3C//ENTITIES Publishing//EN" "iso8879/isopub.ent">
+<!ENTITY % isoamsa PUBLIC "-//W3C//ENTITIES Added Math Symbols: Arrow Relations//EN" "iso9573-13/isoamsa.ent">
+<!ENTITY % isoamsb PUBLIC "-//W3C//ENTITIES Added Math Symbols: Binary Operators//EN" "iso9573-13/isoamsb.ent">
+<!ENTITY % isoamsc PUBLIC "-//W3C//ENTITIES Added Math Symbols: Delimiters//EN" "iso9573-13/isoamsc.ent">
+<!ENTITY % isoamsn PUBLIC "-//W3C//ENTITIES Added Math Symbols: Negated Relations//EN" "iso9573-13/isoamsn.ent">
+<!ENTITY % isoamso PUBLIC "-//W3C//ENTITIES Added Math Symbols: Ordinary//EN" "iso9573-13/isoamso.ent">
+<!ENTITY % isoamsr PUBLIC "-//W3C//ENTITIES Added Math Symbols: Relations//EN" "iso9573-13/isoamsr.ent">
+<!ENTITY % isogrk3 PUBLIC "-//W3C//ENTITIES Greek Symbols//EN" "iso9573-13/isogrk3.ent">
+<!ENTITY % isomfrk PUBLIC "-//W3C//ENTITIES Math Alphabets: Fraktur//EN" "iso9573-13/isomfrk.ent">
+<!ENTITY % isomopf PUBLIC "-//W3C//ENTITIES Math Alphabets: Open Face//EN" "iso9573-13/isomopf.ent">
+<!ENTITY % isomscr PUBLIC "-//W3C//ENTITIES Math Alphabets: Script//EN" "iso9573-13/isomscr.ent">
+<!ENTITY % isotech PUBLIC "-//W3C//ENTITIES General Technical//EN" "iso9573-13/isotech.ent">
+
+
+<!-- ============================================================= -->
+<!--                    SET UP "mml" AS THE MATH PREFIX            -->
+<!-- ============================================================= -->
+
+
+<!--                    MAKE MATH PREFIX PARAMETER ENTITY HAPPEN   -->
+<!ENTITY % MATHML.prefixed 
+                        "INCLUDE"                                    >
+
+
+<!--                    MAKE PREFIX EQUAL "mml"                    -->
+<!ENTITY % MATHML.prefix "mml"                                       >
+
+
+<!--                    SET UP "pfx"                               -->
+<![%MATHML.prefixed;[
+<!ENTITY % MATHML.pfx   "%MATHML.prefix;:"                           >
+]]>
+
+
+<!--                    USE "pfx" TO SET THE MATH ELEMENT NAME     -->
+<!ENTITY % math.qname   "%MATHML.pfx;math"                           >
+
+
+
+<!-- ============================================================= -->
+<!--                    CALL THE MATHML ENTITIES                   -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML CHARACTER ENTITIES                  -->
+<!--                    Set the "INCLUDE" or "IGNORE" marked section
+                        switch for the MATHML 3.0 DTD. This switch
+                        determines whether the math processing in
+                        the -%mathml.dtd; module or the
+                        -%xmlspecchars.ent; module in this DTD Suite
+                        will invoke the sets of special characters
+                        that are defined AND INVOKED in the
+                        -%xmlspecchars.ent; module.
+                        A value of "IGNORE" turns off the second
+                        invocation from the MathML DTD.            -->
+<!ENTITY % mathml-charent.module
+                        "IGNORE"                                     >
+
+
+<!--                    MATHML-SPECIFIC CHARACTER ENTITIES         -->
+<!--                    Because the MATHML invocation is canceled
+                        using the parameter entity just defined,
+                        the two external entities below must be
+                        invoked from here, as neither XMLspecchars
+                        nor the MathML DTD will invoke them.       -->
+
+<!--                    New characters defined by MathML           -->
+%ent-mmlextra;
+
+
+<!--                    MathML aliases for characters defined above-->
+%ent-mmlalias;
+
+<!--                    NAMED CHARACTERS                           -->
+%isobox;
+%isocyr1;
+%isocyr2;
+%isodia;
+%isolat1;
+%isolat2;
+%isonum;
+%isopub;
+%isoamsa;
+%isoamsb;
+%isoamsc;
+%isoamsn;
+%isoamso;
+%isoamsr;
+%isogrk3;
+%isomfrk;
+%isomopf;
+%isomscr;
+%isotech;
+
+<!-- ============================================================= -->
+<!--                    RESTRICT CONTENT OF ANNOTATION             -->
+<!-- ============================================================= -->
+
+<!--                    MATHML ANNOTATION MODEL                    -->
+<!--                    The MathML 3.0 DTD establishes the content of 
+                        the <mml:annotation-xml> element as any MathML
+                        expression. This is unnecessarily broad, 
+                        causing inconvenience during conversion. 
+                        The model has been restricted to
+                        one or more paragraphs.                    -->
+<!ENTITY % annotation-xml.model
+                        "#PCDATA"                                       >
+
+
+<!-- ============================================================= -->
+<!--                    MathML 3.0 INVOCATION                      -->
+<!-- ============================================================= -->
+
+%mathml.dtd;
diff --git a/dtd/mathml2-qname-1.mod b/dtd/mathml2-qname-1.mod
new file mode 100644
index 0000000..92a7621
--- /dev/null
+++ b/dtd/mathml2-qname-1.mod
@@ -0,0 +1 @@
+<!-- ....................................................................... -->
<!-- MathML Qualified Names Module  ........................................ -->
<!-- file: mathml2-qname-1.mod

     This is the Mathematical Markup Language (MathML) 2.0, an XML 
     application for describing mathematical notation and capturing 
     both its structure and content.

     Copyright 1998-2000 W3C (MIT, INRIA, Keio), All Rights Reserved.
     Revision: $Id: mathml2-qname-1.mod,v 1.3 2004/12/28 20:31:20 beck Exp $ 

     This DTD module is identified by the PUBLIC and SYSTEM identifiers:

       PUBLIC "-//W3C//ENTITIES MathML 2.0 Qualified Names 1.0//EN"
       SYSTEM "mathml2-qname-1.mod"

     Revisions:
     (none)
     ....................................................................... -->

<!-- MathML Qualified Names

     This module is contained in two parts, labeled Section 'A' and 'B':

       Section A declares parameter entities to support namespace-
       qualified names, namespace declarations, and name prefixing 
       for MathML.
    
       Section B declares parameter entities used to provide
       namespace-qualified names for all MathML element types.

     This module is derived from the XHTML Qualified Names Template module.
-->

<!-- Section A: XHTML XML Namespace Framework :::::::::::::::::::: -->

<!ENTITY % NS.prefixed     "IGNORE" >
<!ENTITY % MATHML.prefixed "%NS.prefixed;" >

<!-- XLink ............... -->

<!ENTITY % XLINK.xmlns "http://www.w3.org/1999/xlink" >
<!ENTITY % XLINK.xmlns.attrib
     "xmlns:xlink  CDATA           #FIXED '%XLINK.xmlns;'"
>

<!-- MathML .............. -->

<!ENTITY % MATHML.xmlns    "http://www.w3.org/1998/Math/MathML" >
<!ENTITY % MATHML.prefix   "m" >
<![%MATHML.prefixed;[
<!ENTITY % MATHML.xmlns.extra.attrib  "" >
]]>
<!ENTITY % MATHML.xmlns.extra.attrib 
     "%XLINK.xmlns.attrib;" >

<![%MATHML.prefixed;[
<!ENTITY % MATHML.pfx  "%MATHML.prefix;:" >
<!ENTITY % MATHML.xmlns.attrib
     "xmlns:%MATHML.prefix;  CDATA   #FIXED '%MATHML.xmlns;'
      %MATHML.xmlns.extra.attrib;"
>
]]>
<!ENTITY % MATHML.pfx  "" >
<!ENTITY % MATHML.xmlns.attrib
     "xmlns        CDATA           #FIXED '%MATHML.xmlns;'
      %MATHML.xmlns.extra.attrib;"
>

<![%NS.prefixed;[
<!ENTITY % XHTML.xmlns.extra.attrib 
     "%MATHML.xmlns.attrib;" >
]]>
<!ENTITY % XHTML.xmlns.extra.attrib
     "%XLINK.xmlns.attrib;"
>

<!-- Section B: MathML Qualified Names ::::::::::::::::::::::::::::: -->

<!-- 9. This section declares parameter entities used to provide
        namespace-qualified names for all MathML element types.
-->

<!ENTITY % abs.qname            "%MATHML.pfx;abs" >
<!ENTITY % and.qname            "%MATHML.pfx;and" >
<!ENTITY % annotation-xml.qname "%MATHML.pfx;annotation-xml" >
<!ENTITY % annotation.qname     "%MATHML.pfx;annotation" >
<!ENTITY % apply.qname          "%MATHML.pfx;apply" >
<!ENTITY % approx.qname         "%MATHML.pfx;approx" >
<!ENTITY % arccos.qname         "%MATHML.pfx;arccos" >
<!ENTITY % arccosh.qname        "%MATHML.pfx;arccosh" >
<!ENTITY % arccosh.qname        "%MATHML.pfx;arccosh" >
<!ENTITY % arccot.qname         "%MATHML.pfx;arccot" >
<!ENTITY % arccoth.qname        "%MATHML.pfx;arccoth" >
<!ENTITY % arccsc.qname         "%MATHML.pfx;arccsc" >
<!ENTITY % arccsch.qname        "%MATHML.pfx;arccsch" >
<!ENTITY % arcsec.qname         "%MATHML.pfx;arcsec" >
<!ENTITY % arcsech.qname        "%MATHML.pfx;arcsech" >
<!ENTITY % arcsin.qname         "%MATHML.pfx;arcsin" >
<!ENTITY % arcsinh.qname        "%MATHML.pfx;arcsinh" >
<!ENTITY % arctan.qname         "%MATHML.pfx;arctan" >
<!ENTITY % arctanh.qname        "%MATHML.pfx;arctanh" >
<!ENTITY % arg.qname            "%MATHML.pfx;arg" >
<!ENTITY % bvar.qname           "%MATHML.pfx;bvar" >
<!ENTITY % card.qname           "%MATHML.pfx;card" >
<!ENTITY % cartesianproduct.qname "%MATHML.pfx;cartesianproduct" >
<!ENTITY % ceiling.qname         "%MATHML.pfx;ceiling" >
<!ENTITY % ci.qname             "%MATHML.pfx;ci" >
<!ENTITY % cn.qname             "%MATHML.pfx;cn" >
<!ENTITY % codomain.qname       "%MATHML.pfx;codomain" >
<!ENTITY % complexes.qname      "%MATHML.pfx;complexes" >
<!ENTITY % compose.qname        "%MATHML.pfx;compose" >
<!ENTITY % condition.qname      "%MATHML.pfx;condition" >
<!ENTITY % conjugate.qname      "%MATHML.pfx;conjugate" >
<!ENTITY % cos.qname            "%MATHML.pfx;cos" >
<!ENTITY % cosh.qname           "%MATHML.pfx;cosh" >
<!ENTITY % cot.qname            "%MATHML.pfx;cot" >
<!ENTITY % coth.qname           "%MATHML.pfx;coth" >
<!ENTITY % csc.qname            "%MATHML.pfx;csc" >
<!ENTITY % csch.qname           "%MATHML.pfx;csch" >
<!ENTITY % csymbol.qname        "%MATHML.pfx;csymbol" >
<!ENTITY % curl.qname           "%MATHML.pfx;curl" >
<!ENTITY % declare.qname        "%MATHML.pfx;declare" >
<!ENTITY % degree.qname         "%MATHML.pfx;degree" >
<!ENTITY % determinant.qname    "%MATHML.pfx;determinant" >
<!ENTITY % diff.qname           "%MATHML.pfx;diff" >
<!ENTITY % divergence.qname     "%MATHML.pfx;divergence" >
<!ENTITY % divide.qname         "%MATHML.pfx;divide" >
<!ENTITY % domain.qname         "%MATHML.pfx;domain" >
<!ENTITY % domainofapplication.qname "%MATHML.pfx;domainofapplication" >
<!ENTITY % emptyset.qname       "%MATHML.pfx;emptyset" >
<!ENTITY % eq.qname             "%MATHML.pfx;eq" >
<!ENTITY % equivalent.qname     "%MATHML.pfx;equivalent" >
<!ENTITY % eulergamma.qname     "%MATHML.pfx;eulergamma" >
<!ENTITY % exists.qname         "%MATHML.pfx;exists" >
<!ENTITY % exp.qname            "%MATHML.pfx;exp" >
<!ENTITY % exponentiale.qname   "%MATHML.pfx;exponentiale" >
<!ENTITY % factorial.qname      "%MATHML.pfx;factorial" >
<!ENTITY % factorof.qname       "%MATHML.pfx;factorof" >
<!ENTITY % false.qname          "%MATHML.pfx;false" >
<!ENTITY % floor.qname          "%MATHML.pfx;floor" >
<!ENTITY % fn.qname             "%MATHML.pfx;fn" >
<!ENTITY % forall.qname         "%MATHML.pfx;forall" >
<!ENTITY % gcd.qname            "%MATHML.pfx;gcd" >
<!ENTITY % geq.qname            "%MATHML.pfx;geq" >
<!ENTITY % grad.qname           "%MATHML.pfx;grad" >
<!ENTITY % gt.qname             "%MATHML.pfx;gt" >
<!ENTITY % ident.qname          "%MATHML.pfx;ident" >
<!ENTITY % image.qname          "%MATHML.pfx;image" >
<!ENTITY % imaginary.qname      "%MATHML.pfx;imaginary" >
<!ENTITY % imaginaryi.qname     "%MATHML.pfx;imaginaryi" >
<!ENTITY % implies.qname        "%MATHML.pfx;implies" >
<!ENTITY % in.qname             "%MATHML.pfx;in" >
<!ENTITY % infinity.qname       "%MATHML.pfx;infinity" >
<!ENTITY % int.qname            "%MATHML.pfx;int" >
<!ENTITY % integers.qname       "%MATHML.pfx;integers" >
<!ENTITY % intersect.qname      "%MATHML.pfx;intersect" >
<!ENTITY % interval.qname       "%MATHML.pfx;interval" >
<!ENTITY % inverse.qname        "%MATHML.pfx;inverse" >
<!ENTITY % lambda.qname         "%MATHML.pfx;lambda" >
<!ENTITY % laplacian.qname      "%MATHML.pfx;laplacian" >
<!ENTITY % lcm.qname            "%MATHML.pfx;lcm" >
<!ENTITY % leq.qname            "%MATHML.pfx;leq" >
<!ENTITY % limit.qname          "%MATHML.pfx;limit" >
<!ENTITY % list.qname           "%MATHML.pfx;list" >
<!ENTITY % ln.qname             "%MATHML.pfx;ln" >
<!ENTITY % log.qname            "%MATHML.pfx;log" >
<!ENTITY % logbase.qname        "%MATHML.pfx;logbase" >
<!ENTITY % lowlimit.qname       "%MATHML.pfx;lowlimit" >
<!ENTITY % lt.qname             "%MATHML.pfx;lt" >
<!ENTITY % maction.qname        "%MATHML.pfx;maction" >
<!ENTITY % maligngroup.qname    "%MATHML.pfx;maligngroup" >
<!ENTITY % malignmark.qname     "%MATHML.pfx;malignmark" >
<!ENTITY % math.qname           "%MATHML.pfx;math" >
<!ENTITY % matrix.qname         "%MATHML.pfx;matrix" >
<!ENTITY % matrixrow.qname      "%MATHML.pfx;matrixrow" >
<!ENTITY % max.qname            "%MATHML.pfx;max" >
<!ENTITY % mean.qname           "%MATHML.pfx;mean" >
<!ENTITY % median.qname         "%MATHML.pfx;median" >
<!ENTITY % menclose.qname       "%MATHML.pfx;menclose" >
<!ENTITY % merror.qname         "%MATHML.pfx;merror" >
<!ENTITY % mfenced.qname        "%MATHML.pfx;mfenced" >
<!ENTITY % mfrac.qname          "%MATHML.pfx;mfrac" >
<!ENTITY % mglyph.qname         "%MATHML.pfx;mglyph" >
<!ENTITY % mi.qname             "%MATHML.pfx;mi" >
<!ENTITY % min.qname            "%MATHML.pfx;min" >
<!ENTITY % minus.qname          "%MATHML.pfx;minus" >
<!ENTITY % mlabeledtr.qname     "%MATHML.pfx;mlabeledtr" >
<!ENTITY % mmultiscripts.qname  "%MATHML.pfx;mmultiscripts" >
<!ENTITY % mn.qname             "%MATHML.pfx;mn" >
<!ENTITY % mo.qname             "%MATHML.pfx;mo" >
<!ENTITY % mode.qname           "%MATHML.pfx;mode" >
<!ENTITY % moment.qname         "%MATHML.pfx;moment" >
<!ENTITY % momentabout.qname    "%MATHML.pfx;momentabout" >
<!ENTITY % mover.qname          "%MATHML.pfx;mover" >
<!ENTITY % mpadded.qname        "%MATHML.pfx;mpadded" >
<!ENTITY % mphantom.qname       "%MATHML.pfx;mphantom" >
<!ENTITY % mprescripts.qname    "%MATHML.pfx;mprescripts" >
<!ENTITY % mroot.qname          "%MATHML.pfx;mroot" >
<!ENTITY % mrow.qname           "%MATHML.pfx;mrow" >
<!ENTITY % ms.qname             "%MATHML.pfx;ms" >
<!ENTITY % mspace.qname         "%MATHML.pfx;mspace" >
<!ENTITY % msqrt.qname          "%MATHML.pfx;msqrt" >
<!ENTITY % mstyle.qname         "%MATHML.pfx;mstyle" >
<!ENTITY % msub.qname           "%MATHML.pfx;msub" >
<!ENTITY % msubsup.qname        "%MATHML.pfx;msubsup" >
<!ENTITY % msup.qname           "%MATHML.pfx;msup" >
<!ENTITY % mtable.qname         "%MATHML.pfx;mtable" >
<!ENTITY % mtd.qname            "%MATHML.pfx;mtd" >
<!ENTITY % mtext.qname          "%MATHML.pfx;mtext" >
<!ENTITY % mtr.qname            "%MATHML.pfx;mtr" >
<!ENTITY % munder.qname         "%MATHML.pfx;munder" >
<!ENTITY % munderover.qname     "%MATHML.pfx;munderover" >
<!ENTITY % naturalnumbers.qname "%MATHML.pfx;naturalnumbers" >
<!ENTITY % neq.qname            "%MATHML.pfx;neq" >
<!ENTITY % none.qname           "%MATHML.pfx;none" >
<!ENTITY % not.qname            "%MATHML.pfx;not" >
<!ENTITY % notanumber.qname     "%MATHML.pfx;notanumber" >
<!ENTITY % notin.qname          "%MATHML.pfx;notin" >
<!ENTITY % notprsubset.qname    "%MATHML.pfx;notprsubset" >
<!ENTITY % notsubset.qname      "%MATHML.pfx;notsubset" >
<!ENTITY % or.qname             "%MATHML.pfx;or" >
<!ENTITY % otherwise.qname      "%MATHML.pfx;otherwise" >
<!ENTITY % outerproduct.qname   "%MATHML.pfx;outerproduct" >
<!ENTITY % partialdiff.qname    "%MATHML.pfx;partialdiff" >
<!ENTITY % pi.qname             "%MATHML.pfx;pi" >
<!ENTITY % piece.qname          "%MATHML.pfx;piece" >
<!ENTITY % piecewise.qname      "%MATHML.pfx;piecewise" >
<!ENTITY % plus.qname           "%MATHML.pfx;plus" >
<!ENTITY % power.qname          "%MATHML.pfx;power" >
<!ENTITY % primes.qname         "%MATHML.pfx;primes" >
<!ENTITY % product.qname        "%MATHML.pfx;product" >
<!ENTITY % prsubset.qname       "%MATHML.pfx;prsubset" >
<!ENTITY % quotient.qname       "%MATHML.pfx;quotient" >
<!ENTITY % rationals.qname      "%MATHML.pfx;rationals" >
<!ENTITY % real.qname           "%MATHML.pfx;real" >
<!ENTITY % reals.qname          "%MATHML.pfx;reals" >
<!ENTITY % reln.qname           "%MATHML.pfx;reln" >
<!ENTITY % rem.qname            "%MATHML.pfx;rem" >
<!ENTITY % root.qname           "%MATHML.pfx;root" >
<!ENTITY % scalarproduct.qname  "%MATHML.pfx;scalarproduct" >
<!ENTITY % sdev.qname           "%MATHML.pfx;sdev" >
<!ENTITY % sec.qname            "%MATHML.pfx;sec" >
<!ENTITY % sech.qname           "%MATHML.pfx;sech" >
<!ENTITY % selector.qname       "%MATHML.pfx;selector" >
<!ENTITY % semantics.qname      "%MATHML.pfx;semantics" >
<!ENTITY % sep.qname            "%MATHML.pfx;sep" >
<!ENTITY % set.qname            "%MATHML.pfx;set" >
<!ENTITY % setdiff.qname        "%MATHML.pfx;setdiff" >
<!ENTITY % sin.qname            "%MATHML.pfx;sin" >
<!ENTITY % sinh.qname           "%MATHML.pfx;sinh" >
<!ENTITY % subset.qname         "%MATHML.pfx;subset" >
<!ENTITY % sum.qname            "%MATHML.pfx;sum" >
<!ENTITY % tan.qname            "%MATHML.pfx;tan" >
<!ENTITY % tanh.qname           "%MATHML.pfx;tanh" >
<!ENTITY % tendsto.qname        "%MATHML.pfx;tendsto" >
<!ENTITY % times.qname          "%MATHML.pfx;times" >
<!ENTITY % transpose.qname      "%MATHML.pfx;transpose" >
<!ENTITY % true.qname           "%MATHML.pfx;true" >
<!ENTITY % union.qname          "%MATHML.pfx;union" >
<!ENTITY % uplimit.qname        "%MATHML.pfx;uplimit" >
<!ENTITY % variance.qname       "%MATHML.pfx;variance" >
<!ENTITY % vector.qname         "%MATHML.pfx;vector" >
<!ENTITY % vectorproduct.qname  "%MATHML.pfx;vectorproduct" >
<!ENTITY % xor.qname            "%MATHML.pfx;xor" >


<!-- ignores subsequent instantiation of this module when
     used as external subset rather than module fragment.
     NOTE: Do not modify this parameter entity, otherwise
     a recursive parsing situation may result.
-->
<!ENTITY % mathml-qname.module "IGNORE" >

<!-- end of template-qname-1.mod -->
\ No newline at end of file
diff --git a/dtd/mathml2.dtd b/dtd/mathml2.dtd
new file mode 100644
index 0000000..47ac1be
--- /dev/null
+++ b/dtd/mathml2.dtd
@@ -0,0 +1,1960 @@
+<!-- MathML 2.0 DTD  ....................................................... -->
+<!-- file: mathml2.dtd
+-->
+
+<!-- MathML 2.0 DTD
+
+     This is the Mathematical Markup Language (MathML) 2.0, an XML
+     application for describing mathematical notation and capturing
+     both its structure and content.
+
+     Copyright 1998-2000 World Wide Web Consortium
+        (Massachusetts Institute of Technology, Institut National de
+         Recherche en Informatique et en Automatique, Keio University).
+         All Rights Reserved.
+
+     Permission to use, copy, modify and distribute the XHTML 1.1 DTD and
+     its accompanying documentation for any purpose and without fee is
+     hereby granted in perpetuity, provided that the above copyright notice
+     and this paragraph appear in all copies.  The copyright holders make
+     no representation about the suitability of the DTD for any purpose.
+
+     It is provided "as is" without expressed or implied warranty.
+
+        Revision:   $Id: mathml2.dtd,v 1.1 2002/04/16 18:47:11 beck Exp $
+
+     This entity may be identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//DTD MathML 2.0//EN"
+       SYSTEM "mathml2.dtd"
+
+     Revisions: editor and revision history at EOF
+-->
+
+
+<!-- MathML Qualified Names module ............................... -->
+<!ENTITY % mathml-qname.module "INCLUDE" >
+<![%mathml-qname.module;[
+<!ENTITY % mathml-qname.mod
+     PUBLIC "-//W3C//ENTITIES MathML 2.0 Qualified Names 1.0//EN"
+            "mathml2-qname-1.mod" >
+%mathml-qname.mod;]]>
+
+<!-- if %NS.prefixed; is INCLUDE, include all NS attributes, 
+     otherwise just those associated with MathML
+-->
+<![%NS.prefixed;[
+<!ENTITY % MATHML.NamespaceDecl.attrib 
+     "%NamespaceDecl.attrib;"
+>
+]]>
+<!ENTITY % MATHML.NamespaceDecl.attrib 
+     "%MATHML.xmlns.attrib;"
+>
+
+<!-- Attributes shared by all elements  .......................... -->
+
+<!ENTITY % MATHML.Common.attrib
+     "%MATHML.NamespaceDecl.attrib;
+      xlink:href   CDATA                    #IMPLIED
+      class        CDATA                    #IMPLIED
+      style        CDATA                    #IMPLIED
+      id           ID                       #IMPLIED
+      xref         IDREF                    #IMPLIED
+      other        CDATA                    #IMPLIED"
+>
+
+<!-- Presentation element set  ................................... -->
+
+<!-- Attribute definitions -->
+
+<!ENTITY % att-fontsize
+     "fontsize     CDATA                    #IMPLIED" >
+<!ENTITY % att-fontweight
+     "fontweight   ( normal | bold )        #IMPLIED" >
+<!ENTITY % att-fontstyle
+     "fontstyle    ( normal | italic )      #IMPLIED" >
+<!ENTITY % att-fontfamily
+     "fontfamily   CDATA                    #IMPLIED" >
+<!ENTITY % att-color
+     "color        CDATA                    #IMPLIED" >
+
+<!-- MathML2 typographically-distinguished symbol attributes -->
+
+<!ENTITY % att-mathvariant
+     "mathvariant     CDATA                    #IMPLIED" >
+<!ENTITY % att-mathsize
+     "mathsize     CDATA                    #IMPLIED" >
+<!ENTITY % att-mathcolor
+     "mathcolor     CDATA                    #IMPLIED" >
+<!ENTITY % att-mathbackground
+     "mathbackground     CDATA                    #IMPLIED" >
+
+<!ENTITY % att-fontinfo
+     "%att-fontsize;
+      %att-fontweight;
+      %att-fontstyle;
+      %att-fontfamily;
+      %att-color;
+      %att-mathvariant;
+      %att-mathsize;
+      %att-mathcolor;
+      %att-mathbackground;"
+>
+
+<!ENTITY % att-form
+     "form         ( prefix | infix | postfix )  #IMPLIED" >
+<!ENTITY % att-fence
+     "fence        ( true | false )         #IMPLIED" >
+<!ENTITY % att-separator
+     "separator    ( true | false )         #IMPLIED" >
+<!ENTITY % att-lspace
+     "lspace       CDATA                    #IMPLIED" >
+<!ENTITY % att-rspace
+     "rspace       CDATA                    #IMPLIED" >
+<!ENTITY % att-stretchy
+     "stretchy     ( true | false )         #IMPLIED" >
+<!ENTITY % att-symmetric
+     "symmetric    ( true | false )         #IMPLIED" >
+<!ENTITY % att-maxsize
+     "maxsize      CDATA                    #IMPLIED" >
+<!ENTITY % att-minsize
+     "minsize      CDATA                    #IMPLIED" >
+<!ENTITY % att-largeop
+     "largeop      ( true | false)          #IMPLIED" >
+<!ENTITY % att-movablelimits
+     "movablelimits ( true | false )        #IMPLIED" >
+<!ENTITY % att-accent
+     "accent       ( true | false )         #IMPLIED" >
+
+<!ENTITY % att-opinfo
+     "%att-form;
+      %att-fence;
+      %att-separator;
+      %att-lspace;
+      %att-rspace;
+      %att-stretchy;
+      %att-symmetric;
+      %att-maxsize;
+      %att-minsize;
+      %att-largeop;
+      %att-movablelimits;
+      %att-accent;"
+>
+<!ENTITY % att-width
+     "width        CDATA                    #IMPLIED" >
+<!ENTITY % att-height
+     "height       CDATA                    #IMPLIED" >
+<!ENTITY % att-depth
+     "depth        CDATA                    #IMPLIED" >
+<!ENTITY % att-linebreak
+     "linebreak    CDATA                    #IMPLIED" >
+<!ENTITY % att-sizeinfo
+     "%att-width;
+      %att-height;
+      %att-depth;"
+>
+<!ENTITY % att-lquote               
+     "lquote       CDATA                    #IMPLIED" >
+<!ENTITY % att-rquote               
+     "rquote       CDATA                    #IMPLIED" >
+<!ENTITY % att-linethickness        
+     "linethickness CDATA                   #IMPLIED" >
+<!ENTITY % att-scriptlevel          
+     "scriptlevel  CDATA                    #IMPLIED" >
+<!ENTITY % att-displaystyle         
+     "displaystyle ( true | false )         #IMPLIED" >
+<!ENTITY % att-scriptsizemultiplier 
+     "scriptsizemultiplier CDATA            #IMPLIED" >
+<!ENTITY % att-scriptminsize        
+     "scriptminsize CDATA                   #IMPLIED" >
+<!ENTITY % att-background           
+     "background   CDATA                    #IMPLIED" >
+<!ENTITY % att-veryverythinmathspace           
+     "veryverythinmathspace   CDATA         #IMPLIED" >
+<!ENTITY % att-verythinmathspace           
+     "verythinmathspace   CDATA             #IMPLIED" >
+<!ENTITY % att-thinmathspace           
+     "thinmathspace   CDATA                 #IMPLIED" >
+<!ENTITY % att-mediummathspace           
+     "mediummathspace   CDATA               #IMPLIED" >
+<!ENTITY % att-thickmathspace           
+     "thickmathspace   CDATA                #IMPLIED" >
+<!ENTITY % att-verythickmathspace           
+     "verythickmathspace   CDATA            #IMPLIED" >
+<!ENTITY % att-veryverythickmathspace           
+     "veryverythickmathspace   CDATA        #IMPLIED" >
+<!ENTITY % att-open                 
+     "open         CDATA                    #IMPLIED" >
+<!ENTITY % att-close                
+     "close        CDATA                    #IMPLIED" >
+<!ENTITY % att-separators          
+     "separators   CDATA                    #IMPLIED" >
+<!ENTITY % att-subscriptshift       
+     "subscriptshift CDATA                  #IMPLIED" >
+<!ENTITY % att-superscriptshift     
+     "superscriptshift CDATA                #IMPLIED" >
+<!ENTITY % att-accentunder          
+     "accentunder  ( true | false )         #IMPLIED" >
+<!ENTITY % att-align       
+     "align        CDATA                    #IMPLIED" >
+<!ENTITY % att-rowalign      
+     "rowalign     CDATA                    #IMPLIED" >
+<!ENTITY % att-columnalign     
+     "columnalign  CDATA                    #IMPLIED" >
+<!ENTITY % att-columnwidth   
+     "columnwidth  CDATA                    #IMPLIED" >
+<!ENTITY % att-groupalign      
+     "groupalign   CDATA                    #IMPLIED" >
+<!ENTITY % att-alignmentscope 
+     "alignmentscope CDATA                  #IMPLIED" >
+<!ENTITY % att-rowspacing           
+     "rowspacing   CDATA                    #IMPLIED" >
+<!ENTITY % att-columnspacing      
+     "columnspacing CDATA                   #IMPLIED" >
+<!ENTITY % att-rowlines            
+     "rowlines     CDATA                    #IMPLIED" >
+<!ENTITY % att-columnlines        
+     "columnlines  CDATA                    #IMPLIED" >
+<!ENTITY % att-frame            
+     "frame       ( none | solid | dashed ) #IMPLIED" >
+<!ENTITY % att-framespacing         
+     "framespacing CDATA                    #IMPLIED" >
+<!ENTITY % att-equalrows        
+     "equalrows    CDATA                    #IMPLIED" >
+<!ENTITY % att-equalcolumns         
+     "equalcolumns CDATA                    #IMPLIED" >
+
+<!ENTITY % att-tableinfo            
+     "%att-align;
+      %att-rowalign;
+      %att-columnalign;
+      %att-columnwidth;
+      %att-groupalign;
+      %att-alignmentscope;
+      %att-rowspacing;
+      %att-columnspacing;
+      %att-rowlines;
+      %att-columnlines;
+      %att-frame;
+      %att-framespacing;
+      %att-equalrows;
+      %att-equalcolumns;
+      %att-displaystyle;" 
+>
+
+<!ENTITY % att-rowspan              
+     "rowspan      CDATA                    #IMPLIED" >
+<!ENTITY % att-columnspan           
+     "columnspan   CDATA                    #IMPLIED" >
+<!ENTITY % att-edge        
+     "edge         ( left | right )         #IMPLIED" >
+<!ENTITY % att-actiontype          
+     "actiontype   CDATA                    #IMPLIED" >
+<!ENTITY % att-selection       
+     "selection    CDATA                    #IMPLIED" >
+
+<!ENTITY % att-name                 
+     "name         CDATA                    #IMPLIED" >
+<!ENTITY % att-alt              
+     "alt          CDATA                    #IMPLIED" >
+<!ENTITY % att-index           
+     "index        CDATA                    #IMPLIED" >
+
+<!ENTITY % att-bevelled       
+     "bevelled      CDATA                    #IMPLIED" >
+
+<!-- Presentation schemata with content -->
+
+<!ENTITY % ptoken                   
+     "%mi.qname; | %mn.qname; | %mo.qname;
+      | %mtext.qname; | %ms.qname;" >
+
+<!ATTLIST %mi.qname;
+      %MATHML.Common.attrib;
+      %att-fontinfo;
+>
+
+<!ATTLIST %mn.qname;      
+      %MATHML.Common.attrib; 
+      %att-fontinfo;
+>
+
+<!ATTLIST %mo.qname;     
+      %MATHML.Common.attrib; 
+      %att-fontinfo;
+      %att-opinfo;
+>
+
+<!ATTLIST %mtext.qname;  
+      %MATHML.Common.attrib;
+      %att-fontinfo;
+>
+
+<!ATTLIST %ms.qname;     
+      %MATHML.Common.attrib;
+      %att-fontinfo;
+      %att-lquote;
+      %att-rquote;
+>
+
+<!-- Empty presentation schemata -->
+
+<!ENTITY % petoken                  
+     "%mspace.qname;" >
+<!ELEMENT %mspace.qname;  EMPTY >
+
+<!ATTLIST %mspace.qname; 
+      %att-sizeinfo;
+      %att-linebreak;
+      %MATHML.Common.attrib;
+>
+
+<!-- Presentation: general layout schemata -->
+
+<!ENTITY % pgenschema               
+     "%mrow.qname; | %mfrac.qname; | %msqrt.qname; | %mroot.qname; 
+      | %menclose.qname; | %mstyle.qname; | %merror.qname; 
+      | %mpadded.qname; | %mphantom.qname; | %mfenced.qname;" >
+
+<!ATTLIST %mrow.qname;        
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %mfrac.qname;     
+      %MATHML.Common.attrib;
+      %att-bevelled;
+      %att-linethickness;
+>
+
+<!ATTLIST %msqrt.qname;     
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %menclose.qname;  
+      %MATHML.Common.attrib;
+      notation CDATA 'longdiv' >
+
+<!ATTLIST %mroot.qname;    
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %mstyle.qname;  
+      %MATHML.Common.attrib;
+      %att-fontinfo;
+      %att-opinfo;
+      %att-lquote;
+      %att-rquote;
+      %att-linethickness;
+      %att-scriptlevel;
+      %att-scriptsizemultiplier;
+      %att-scriptminsize;
+      %att-background;
+      %att-veryverythinmathspace;
+      %att-verythinmathspace;
+      %att-thinmathspace;
+      %att-mediummathspace;
+      %att-thickmathspace;
+      %att-verythickmathspace;
+      %att-veryverythickmathspace;
+      %att-open;
+      %att-close;
+      %att-separators;
+      %att-subscriptshift;
+      %att-superscriptshift;
+      %att-accentunder;
+      %att-tableinfo;
+      %att-rowspan;
+      %att-columnspan;
+      %att-edge;
+      %att-actiontype;
+      %att-selection;
+>
+
+<!ATTLIST %merror.qname;   
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %mpadded.qname;     
+      %MATHML.Common.attrib;
+      %att-sizeinfo;
+      %att-lspace;
+>
+
+<!ATTLIST %mphantom.qname;      
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %mfenced.qname;     
+      %MATHML.Common.attrib;
+      %att-open;
+      %att-close;
+      %att-separators;
+>
+
+<!-- Presentation layout schemata: scripts and limits -->
+
+<!ENTITY % pscrschema               
+     "%msub.qname; | %msup.qname; | %msubsup.qname; | %munder.qname; 
+      | %mover.qname; | %munderover.qname; | %mmultiscripts.qname;" >
+
+<!ATTLIST %msub.qname;      
+      %MATHML.Common.attrib;
+      %att-subscriptshift;
+>
+
+<!ATTLIST %msup.qname;         
+      %MATHML.Common.attrib;
+      %att-superscriptshift;
+>
+
+<!ATTLIST %msubsup.qname;    
+      %MATHML.Common.attrib;
+      %att-subscriptshift;
+      %att-superscriptshift;
+>
+
+<!ATTLIST %munder.qname;   
+      %MATHML.Common.attrib;
+      %att-accentunder;
+>
+
+<!ATTLIST %mover.qname;   
+      %MATHML.Common.attrib;
+      %att-accent;
+>
+
+<!ATTLIST %munderover.qname;   
+      %MATHML.Common.attrib;
+      %att-accent;
+      %att-accentunder;
+>
+
+<!ATTLIST %mmultiscripts.qname;   
+      %MATHML.Common.attrib;
+      %att-subscriptshift;
+      %att-superscriptshift;
+>
+
+<!-- Presentation layout schemata: empty elements for scripts -->
+
+<!ENTITY % pscreschema              
+     "%mprescripts.qname; | %none.qname;" >
+
+<!ELEMENT %mprescripts.qname;  EMPTY >
+<!ATTLIST %mprescripts.qname;   
+      %MATHML.xmlns.attrib; >
+
+<!ELEMENT %none.qname;  EMPTY >
+<!ATTLIST %none.qname;    
+      %MATHML.xmlns.attrib; >
+
+<!-- Presentation layout schemata: tables -->
+
+<!ENTITY % ptabschema               
+     "%mtable.qname; | %mtr.qname; | %mlabeledtr.qname; | %mtd.qname;" >
+
+<!ATTLIST %mtable.qname;
+      %MATHML.Common.attrib;
+      %att-tableinfo;
+>
+
+<!ATTLIST %mtr.qname;    
+      %MATHML.Common.attrib;
+      %att-rowalign;
+      %att-columnalign;
+      %att-groupalign;
+>
+
+<!ATTLIST %mlabeledtr.qname;  
+      %MATHML.Common.attrib;
+      %att-rowalign;
+      %att-columnalign;
+      %att-groupalign;
+>
+
+<!ATTLIST %mtd.qname;   
+      %MATHML.Common.attrib;
+      %att-rowalign;
+      %att-columnalign;
+      %att-groupalign;
+      %att-rowspan;
+      %att-columnspan;
+>
+
+<!ENTITY % plschema                 
+     "%pgenschema; | %pscrschema; | %ptabschema;" >
+
+<!-- Empty presentation layout schemata -->
+
+<!ENTITY % peschema                 
+     "%maligngroup.qname; | %malignmark.qname;" >
+
+<!ELEMENT %malignmark.qname;  EMPTY >
+
+<!ATTLIST %malignmark.qname;  
+      %att-edge; >
+
+<!ELEMENT %maligngroup.qname;  EMPTY >
+<!ATTLIST %maligngroup.qname;  
+      %MATHML.Common.attrib;
+      %att-groupalign;
+>
+
+
+<!ELEMENT %mglyph.qname;  EMPTY >
+<!ATTLIST %mglyph.qname;    
+      %att-alt;
+      %att-fontfamily;
+      %att-index; >
+
+<!-- Presentation action schemata -->
+
+<!ENTITY % pactions                 
+     "%maction.qname;" >
+<!ATTLIST %maction.qname;    
+      %MATHML.Common.attrib;
+      %att-actiontype;
+      %att-selection;
+>
+
+<!-- The following entity for substitution into
+     content constructs excludes elements that
+     are not valid as expressions.
+-->
+
+<!ENTITY % PresInCont               
+     "%ptoken; | %petoken; |
+      %plschema; | %peschema; | %pactions;" >
+
+<!-- Presentation entity: all presentation constructs -->
+
+<!ENTITY % Presentation             
+     "%ptoken; | %petoken; | %pscreschema; |
+      %plschema; | %peschema; | %pactions;">
+
+<!-- Content element set  ........................................ -->
+
+<!-- Attribute definitions -->
+
+<!ENTITY % att-base                 
+     "base         CDATA                    '10'" >
+<!ENTITY % att-closure              
+     "closure      CDATA                    'closed'" >
+<!ENTITY % att-definition           
+     "definitionURL CDATA                   ''" >
+<!ENTITY % att-encoding             
+     "encoding     CDATA                    ''" >
+<!ENTITY % att-nargs             
+     "nargs        CDATA                    '1'" >
+<!ENTITY % att-occurrence           
+     "occurrence   CDATA                    'function-model'" >
+<!ENTITY % att-order   
+     "order        CDATA                    'numeric'" >
+<!ENTITY % att-scope                
+     "scope        CDATA                    'local'" >
+<!ENTITY % att-type                 
+     "type         CDATA                    #IMPLIED" >
+
+<!-- Content elements: leaf nodes -->
+
+<!ENTITY % ctoken               
+     "%csymbol.qname; | %ci.qname; | %cn.qname;" >
+
+<!ATTLIST %ci.qname;     
+      %MATHML.Common.attrib;
+      %att-type;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ATTLIST %csymbol.qname;   
+      %MATHML.Common.attrib;
+      %att-encoding;
+      %att-type;
+      %att-definition;
+>
+
+<!ATTLIST %cn.qname;    
+      %MATHML.Common.attrib;
+      %att-type;
+      %att-base;
+      %att-definition;
+      %att-encoding;
+>
+
+<!-- Content elements: specials -->
+
+<!ENTITY % cspecial                 
+     "%apply.qname; | %reln.qname; |
+      %lambda.qname;" >
+
+<!ATTLIST %apply.qname;   
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %reln.qname;   
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %lambda.qname;      
+      %MATHML.Common.attrib;
+>
+
+<!-- Content elements: others -->
+
+<!ENTITY % cother                   
+     "%condition.qname; | %declare.qname; | %sep.qname;" >
+
+<!ATTLIST %condition.qname;     
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %declare.qname;    
+      %MATHML.Common.attrib;
+      %att-type;
+      %att-scope;
+      %att-nargs;
+      %att-occurrence;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %sep.qname;  EMPTY >
+<!ATTLIST %sep.qname;         
+      %MATHML.xmlns.attrib; >
+
+<!-- Content elements: semantic mapping -->
+
+<!ENTITY % csemantics               
+     "%semantics.qname; | %annotation.qname; |
+      %annotation-xml.qname;" >
+
+<!ATTLIST %semantics.qname;  
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ATTLIST %annotation.qname;  
+      %MATHML.Common.attrib;
+      %att-encoding;
+>
+
+<!ATTLIST %annotation-xml.qname; 
+      %MATHML.Common.attrib;
+      %att-encoding;
+>
+
+<!-- Content elements: constructors -->
+
+<!ENTITY % cconstructor             
+     "%interval.qname; | %list.qname; | %matrix.qname; 
+      | %matrixrow.qname; | %set.qname; | %vector.qname;
+      | %piecewise.qname; " >
+
+<!ATTLIST %interval.qname;   
+      %MATHML.Common.attrib;
+      %att-closure;
+>
+
+<!ATTLIST %set.qname;        
+      %MATHML.Common.attrib;
+      %att-type;
+>
+
+<!ATTLIST %list.qname;          
+      %MATHML.Common.attrib;
+      %att-order;
+>
+
+<!ATTLIST %vector.qname;    
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %matrix.qname;    
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %matrixrow.qname;     
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %piecewise.qname;   
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %piece.qname;   
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %otherwise.qname;   
+      %MATHML.Common.attrib;
+>
+
+
+<!-- Content elements: symbols -->
+
+<!ENTITY % c0ary              
+    "%integers.qname; |
+     %reals.qname; |
+     %rationals.qname; |
+     %naturalnumbers.qname; |
+     %complexes.qname; |
+     %primes.qname; |
+     %exponentiale.qname; |
+     %imaginaryi.qname; |
+     %notanumber.qname; |
+     %true.qname; |
+     %false.qname; |
+     %emptyset.qname; |
+     %pi.qname; |
+     %eulergamma.qname; |
+     %infinity.qname;" >
+
+<!ELEMENT %integers.qname;  EMPTY >
+<!ATTLIST %integers.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %reals.qname;  EMPTY >
+<!ATTLIST %reals.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %rationals.qname;  EMPTY >
+<!ATTLIST %rationals.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %naturalnumbers.qname;  EMPTY >
+<!ATTLIST %naturalnumbers.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %complexes.qname;  EMPTY >
+<!ATTLIST %complexes.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %primes.qname;  EMPTY >
+<!ATTLIST %primes.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %exponentiale.qname;  EMPTY >
+<!ATTLIST %exponentiale.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %imaginaryi.qname;  EMPTY >
+<!ATTLIST %imaginaryi.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %notanumber.qname;  EMPTY >
+<!ATTLIST %notanumber.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %true.qname;  EMPTY >
+<!ATTLIST %true.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %false.qname;  EMPTY >
+<!ATTLIST %false.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %emptyset.qname;  EMPTY >
+<!ATTLIST %emptyset.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %pi.qname;  EMPTY >
+<!ATTLIST %pi.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %eulergamma.qname;  EMPTY >
+<!ATTLIST %eulergamma.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %infinity.qname;  EMPTY >
+<!ATTLIST %infinity.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!-- Content elements: operators -->
+
+<!ENTITY % cfuncop1ary              
+     "%inverse.qname; | %ident.qname;|
+      %domain.qname; |  %codomain.qname; | 
+      %image.qname;  " >
+
+<!ELEMENT %inverse.qname;  EMPTY >
+<!ATTLIST %inverse.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %domain.qname;  EMPTY >
+<!ATTLIST %domain.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %codomain.qname;  EMPTY >
+<!ATTLIST %codomain.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %image.qname;  EMPTY >
+<!ATTLIST %image.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+
+
+<!ENTITY % cfuncopnary              
+     "%fn.qname; | %compose.qname;" >
+
+<!ATTLIST %fn.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %ident.qname;  EMPTY >
+<!ATTLIST %ident.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %compose.qname;  EMPTY >
+<!ATTLIST %compose.qname;  
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % carithop1ary             
+     "%abs.qname; | %conjugate.qname; | %exp.qname; | %factorial.qname; |
+      %arg.qname; | %real.qname; | %imaginary.qname; |
+      %floor.qname; | %ceiling.qname;" >
+
+<!ELEMENT %exp.qname;  EMPTY >
+<!ATTLIST %exp.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %abs.qname;  EMPTY >
+<!ATTLIST %abs.qname;        
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arg.qname;  EMPTY >
+<!ATTLIST %arg.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %real.qname;  EMPTY >
+<!ATTLIST %real.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %imaginary.qname;  EMPTY >
+<!ATTLIST %imaginary.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %conjugate.qname;  EMPTY >
+<!ATTLIST %conjugate.qname;  
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %factorial.qname;  EMPTY >
+<!ATTLIST %factorial.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+
+<!ELEMENT %floor.qname;  EMPTY >
+<!ATTLIST %floor.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %ceiling.qname;  EMPTY >
+<!ATTLIST %ceiling.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+<!ENTITY % carithop1or2ary          
+     "%minus.qname;" >
+
+<!ELEMENT %minus.qname;  EMPTY >
+<!ATTLIST %minus.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % carithop2ary             
+     "%quotient.qname; | %divide.qname; | %power.qname; | %rem.qname;" >
+
+<!ELEMENT %quotient.qname;  EMPTY >
+<!ATTLIST %quotient.qname;       
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %divide.qname;  EMPTY >
+<!ATTLIST %divide.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %power.qname;  EMPTY >
+<!ATTLIST %power.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %rem.qname;  EMPTY >
+<!ATTLIST %rem.qname;       
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % carithopnary             
+     "%plus.qname; | %times.qname; | %max.qname; 
+      | %min.qname; | %gcd.qname; | %lcm.qname;" >
+
+<!ELEMENT %plus.qname;  EMPTY >
+<!ATTLIST %plus.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %max.qname;  EMPTY >
+<!ATTLIST %max.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %min.qname;  EMPTY >
+<!ATTLIST %min.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %times.qname;  EMPTY >
+<!ATTLIST %times.qname;      
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %gcd.qname;  EMPTY >
+<!ATTLIST %gcd.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %lcm.qname;  EMPTY >
+<!ATTLIST %lcm.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % carithoproot             
+     "%root.qname;" >
+
+<!ELEMENT %root.qname;  EMPTY >
+<!ATTLIST %root.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clogicopquant            
+     "%exists.qname; | %forall.qname;" >
+
+<!ELEMENT %exists.qname;  EMPTY >
+<!ATTLIST %exists.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %forall.qname;  EMPTY >
+<!ATTLIST %forall.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clogicopnary             
+     "%and.qname; | %or.qname; | %xor.qname;" >
+
+<!ELEMENT %and.qname;  EMPTY >
+<!ATTLIST %and.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %or.qname;  EMPTY >
+<!ATTLIST %or.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %xor.qname;  EMPTY >
+<!ATTLIST %xor.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clogicop1ary             
+     "%not.qname;" >
+
+<!ELEMENT %not.qname;  EMPTY >
+<!ATTLIST %not.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clogicop2ary             
+     "%implies.qname;" >
+
+<!ELEMENT %implies.qname;  EMPTY >
+<!ATTLIST %implies.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % ccalcop                  
+     "%log.qname; | %int.qname; | %diff.qname; | %partialdiff.qname; |
+      %divergence.qname; | %grad.qname; | %curl.qname; | %laplacian.qname;" >
+
+<!ELEMENT %divergence.qname;  EMPTY >
+<!ATTLIST %divergence.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %grad.qname;  EMPTY >
+<!ATTLIST %grad.qname;  
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %curl.qname;  EMPTY >
+<!ATTLIST %curl.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %laplacian.qname;  EMPTY >
+<!ATTLIST %laplacian.qname;     
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %log.qname;  EMPTY >
+<!ATTLIST %log.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %int.qname;  EMPTY >
+<!ATTLIST %int.qname;    
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %diff.qname;  EMPTY >
+<!ATTLIST %diff.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %partialdiff.qname;  EMPTY >
+<!ATTLIST %partialdiff.qname;  
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % ccalcop1ary              
+     "%ln.qname;" >
+
+<!ELEMENT %ln.qname;  EMPTY >
+<!ATTLIST %ln.qname;   
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % csetop1ary               
+     "%card.qname;" >
+
+<!ELEMENT %card.qname;  EMPTY >
+<!ATTLIST %card.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % csetop2ary               
+     "%setdiff.qname;" >
+
+<!ELEMENT %setdiff.qname;  EMPTY >
+<!ATTLIST %setdiff.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % csetopnary               
+     "%union.qname; | %intersect.qname; | %cartesianproduct.qname; " >
+
+<!ELEMENT %union.qname;  EMPTY >
+<!ATTLIST %union.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %intersect.qname;  EMPTY >
+<!ATTLIST %intersect.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %cartesianproduct.qname;  EMPTY >
+<!ATTLIST %cartesianproduct.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % cseqop                   
+     "%sum.qname; | %product.qname; | %limit.qname;" >
+
+<!ELEMENT %sum.qname;  EMPTY >
+<!ATTLIST %sum.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %product.qname;  EMPTY >
+<!ATTLIST %product.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %limit.qname;  EMPTY >
+<!ATTLIST %limit.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % ctrigop                  
+     "%sin.qname; | %cos.qname; | %tan.qname; 
+      | %sec.qname; | %csc.qname; | %cot.qname; 
+      | %sinh.qname; | %cosh.qname; | %tanh.qname; 
+      | %sech.qname; | %csch.qname; | %coth.qname; 
+      | %arcsin.qname; | %arccos.qname; | %arctan.qname;
+      | %arccosh.qname; | %arccot.qname; | %arccoth.qname;
+      | %arccsc.qname; | %arccsch.qname; | %arcsec.qname;
+      | %arcsech.qname; | %arcsinh.qname; | %arctanh.qname;
+      " >
+
+<!ELEMENT %sin.qname;  EMPTY >
+<!ATTLIST %sin.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %cos.qname;  EMPTY >
+<!ATTLIST %cos.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %tan.qname;  EMPTY >
+<!ATTLIST %tan.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %sec.qname;  EMPTY >
+<!ATTLIST %sec.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %csc.qname;  EMPTY >
+<!ATTLIST %csc.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %cot.qname;  EMPTY >
+<!ATTLIST %cot.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %sinh.qname;  EMPTY >
+<!ATTLIST %sinh.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %cosh.qname;  EMPTY >
+<!ATTLIST %cosh.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %tanh.qname;  EMPTY >
+<!ATTLIST %tanh.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %sech.qname;  EMPTY >
+<!ATTLIST %sech.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %csch.qname;  EMPTY >
+<!ATTLIST %csch.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %coth.qname;  EMPTY >
+<!ATTLIST %coth.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arcsin.qname;  EMPTY >
+<!ATTLIST %arcsin.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arccos.qname;  EMPTY >
+<!ATTLIST %arccos.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arctan.qname;  EMPTY >
+<!ATTLIST %arctan.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arccosh.qname;  EMPTY >
+<!ATTLIST %arccosh.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+
+<!ELEMENT %arccot.qname;  EMPTY >
+<!ATTLIST %arccot.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arccoth.qname;  EMPTY >
+<!ATTLIST %arccoth.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+
+<!ELEMENT %arccsc.qname;  EMPTY >
+<!ATTLIST %arccsc.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arccsch.qname;  EMPTY >
+<!ATTLIST %arccsch.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arcsec.qname;  EMPTY >
+<!ATTLIST %arcsec.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arcsech.qname;  EMPTY >
+<!ATTLIST %arcsech.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arcsinh.qname;  EMPTY >
+<!ATTLIST %arcsinh.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %arctanh.qname;  EMPTY >
+<!ATTLIST %arctanh.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+
+
+<!ENTITY % cstatopnary              
+     "%mean.qname; | %sdev.qname; |
+      %variance.qname; | %median.qname; |
+      %mode.qname;" >
+
+<!ELEMENT %mean.qname;  EMPTY >
+<!ATTLIST %mean.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %sdev.qname;  EMPTY >
+<!ATTLIST %sdev.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %variance.qname;  EMPTY >
+<!ATTLIST %variance.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %median.qname;  EMPTY >
+<!ATTLIST %median.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %mode.qname;  EMPTY >
+<!ATTLIST %mode.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % cstatopmoment            
+     "%moment.qname;" >
+
+<!ELEMENT %moment.qname;  EMPTY >
+<!ATTLIST %moment.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clalgop1ary              
+     "%determinant.qname; |
+      %transpose.qname;" >
+
+<!ELEMENT %determinant.qname;  EMPTY >
+<!ATTLIST %determinant.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %transpose.qname;  EMPTY >
+<!ATTLIST %transpose.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clalgop2ary              
+     "%vectorproduct.qname; 
+      | %scalarproduct.qname; 
+      | %outerproduct.qname;" >
+
+<!ELEMENT %vectorproduct.qname;  EMPTY >
+<!ATTLIST %vectorproduct.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %scalarproduct.qname;  EMPTY >
+<!ATTLIST %scalarproduct.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %outerproduct.qname;  EMPTY >
+<!ATTLIST %outerproduct.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % clalgopnary              
+     "%selector.qname;" >
+
+<!ELEMENT %selector.qname;  EMPTY >
+<!ATTLIST %selector.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!-- Content elements: relations -->
+
+<!ENTITY % cgenrel2ary             
+     "%neq.qname; | %factorof.qname;" >
+
+<!ELEMENT %neq.qname;  EMPTY >
+<!ATTLIST %neq.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %factorof.qname;  EMPTY >
+<!ATTLIST %factorof.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % cgenrelnary              
+     "%eq.qname; | %leq.qname; | %lt.qname; | %geq.qname; 
+      | %gt.qname;| %equivalent.qname; | %approx.qname;" >
+
+<!ELEMENT %eq.qname;  EMPTY >
+<!ATTLIST %eq.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %equivalent.qname;  EMPTY >
+<!ATTLIST %equivalent.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %approx.qname;  EMPTY >
+<!ATTLIST %approx.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %gt.qname;  EMPTY >
+<!ATTLIST %gt.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %lt.qname;  EMPTY >
+<!ATTLIST %lt.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %geq.qname;  EMPTY >
+<!ATTLIST %geq.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %leq.qname;  EMPTY >
+<!ATTLIST %leq.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % csetrel2ary              
+     "%in.qname; | %notin.qname; | %notsubset.qname; | %notprsubset.qname;" >
+
+<!ELEMENT %in.qname;  EMPTY >
+<!ATTLIST %in.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %notin.qname;  EMPTY >
+<!ATTLIST %notin.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %notsubset.qname;  EMPTY >
+<!ATTLIST %notsubset.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %notprsubset.qname;  EMPTY >
+<!ATTLIST %notprsubset.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % csetrelnary       
+     "%subset.qname; | %prsubset.qname;" >
+
+<!ELEMENT %subset.qname;  EMPTY >
+<!ATTLIST %subset.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ELEMENT %prsubset.qname;  EMPTY >
+<!ATTLIST %prsubset.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+>
+
+<!ENTITY % cseqrel2ary              
+     "%tendsto.qname;" >
+
+<!ELEMENT %tendsto.qname;  EMPTY >
+<!ATTLIST %tendsto.qname;
+      %MATHML.Common.attrib;
+      %att-definition;
+      %att-encoding;
+      %att-type;
+>
+
+<!-- Content elements: quantifiers -->
+
+<!ENTITY % cquantifier            
+     "%lowlimit.qname; | %uplimit.qname; | %bvar.qname; 
+      | %degree.qname; | %logbase.qname;
+      | %momentabout.qname; | %domainofapplication.qname; " >
+
+<!ATTLIST %lowlimit.qname;
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %uplimit.qname;
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %bvar.qname;
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %degree.qname;
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %logbase.qname;
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %momentabout.qname;
+      %MATHML.Common.attrib;
+>
+
+<!ATTLIST %domainofapplication.qname;
+      %MATHML.Common.attrib;
+>
+
+<!-- Operator groups -->
+
+<!ENTITY % cop1ary                  
+     "%cfuncop1ary; | %carithop1ary; | %clogicop1ary; |
+      %ccalcop1ary; | %ctrigop; | %clalgop1ary; |
+      %csetop1ary;" >
+
+<!ENTITY % cop2ary                  
+     "%carithop2ary; | %clogicop2ary;| %clalgop2ary; | %csetop2ary;" >
+
+<!ENTITY % copnary                  
+     "%cfuncopnary; | %carithopnary; | %clogicopnary; |
+      %csetopnary; | %cstatopnary; | %clalgopnary;" >
+
+<!ENTITY % copmisc                  
+     "%carithoproot; | %carithop1or2ary; | %ccalcop; |
+      %cseqop; | %cstatopmoment; | %clogicopquant;" >
+
+<!-- Relation groups -->
+
+<!ENTITY % crel2ary                 
+     "%cgenrel2ary; | %csetrel2ary; | %cseqrel2ary;" >
+
+<!ENTITY % crelnary                 
+     "%cgenrelnary; | %csetrelnary;" >
+
+<!-- Content constructs: all -->
+
+<!ENTITY % Content                  
+     "%ctoken; | %cspecial; | %cother; | %csemantics; | %c0ary;
+      | %cconstructor; | %cquantifier; | %cop1ary; | %cop2ary; 
+      | %copnary; |%copmisc; | %crel2ary; | %crelnary;" >
+
+<!-- Content constructs for substitution in presentation structures -->
+
+<!ENTITY % ContInPres               
+     "%ci.qname; |%csymbol.qname;| %cn.qname; | %c0ary; |
+      %apply.qname; | %fn.qname; |
+      %lambda.qname; | %reln.qname; |
+      %cconstructor; |
+      %semantics.qname; |%declare.qname;" >
+
+<!-- ............................................................. -->
+<!-- Recursive definition for content of expressions. Include
+     presentation constructs at lowest level so presentation
+     layout schemata hold presentation or content elements.
+     Include content constructs at lowest level so content
+     elements hold PCDATA or presentation elements at leaf
+     level (for permitted substitutable elements in context)
+-->
+
+<!ENTITY % ContentExpression        
+     "(%Content; | %PresInCont;)*" >
+<!ENTITY % PresExpression      
+     "(%Presentation; | %ContInPres;)*" >
+<!ENTITY % MathExpression           
+     "(%PresInCont; | %ContInPres;)*" >
+
+<!-- PCDATA or MathML character elements -->
+<!ENTITY % MathMLCharacters         
+     "#PCDATA | %mglyph.qname; " >
+
+<!-- Content elements: tokens                       -->
+<!-- (may contain embedded presentation constructs) -->
+
+<!ELEMENT %ci.qname;                 (%MathMLCharacters; | %PresInCont;)* >
+<!ELEMENT %csymbol.qname;            (%MathMLCharacters; | %PresInCont;)* >
+<!ELEMENT %cn.qname;                 (%MathMLCharacters; | %sep.qname; | %PresInCont;)* >
+
+<!-- Content elements: special -->
+
+<!ELEMENT %apply.qname;              (%ContentExpression;) >
+<!ELEMENT %reln.qname;               (%ContentExpression;) >
+<!ELEMENT %lambda.qname;             (%ContentExpression;) >
+
+<!-- Content elements: other -->
+
+<!ELEMENT %condition.qname;          (%ContentExpression;) >
+<!ELEMENT %declare.qname;            (%ContentExpression;) >
+
+<!-- Content elements: semantics -->
+
+<!ELEMENT %semantics.qname;          (%ContentExpression;) >
+<!ENTITY % Annotation.content  "( #PCDATA )" >
+<!ELEMENT %annotation.qname;         %Annotation.content; >
+
+<!ENTITY % Annotation-xml.content "ANY" >
+<!ELEMENT %annotation-xml.qname;     %Annotation-xml.content; >
+
+<!-- Content elements: constructors -->
+
+<!ELEMENT %interval.qname;           (%ContentExpression;) >
+<!ELEMENT %set.qname;                (%ContentExpression;) >
+<!ELEMENT %list.qname;               (%ContentExpression;) >
+<!ELEMENT %vector.qname;             (%ContentExpression;) >
+<!ELEMENT %matrix.qname;             (%ContentExpression;) >
+<!ELEMENT %matrixrow.qname;          (%ContentExpression;) >
+
+<!ELEMENT %piecewise.qname;          ((%piece.qname;)*, (%otherwise.qname;)? ) >
+<!ELEMENT %piece.qname;              (%ContentExpression;) >
+<!ELEMENT %otherwise.qname;          (%ContentExpression;) >
+
+<!-- Content elements: operator (user-defined) -->
+
+<!ELEMENT %fn.qname;                 (%ContentExpression;) >
+
+<!-- Content elements: quantifiers -->
+
+<!ELEMENT %lowlimit.qname;           (%ContentExpression;) >
+<!ELEMENT %uplimit.qname;            (%ContentExpression;) >
+<!ELEMENT %bvar.qname;               (%ContentExpression;) >
+<!ELEMENT %degree.qname;             (%ContentExpression;) >
+<!ELEMENT %logbase.qname;            (%ContentExpression;) >
+<!ELEMENT %momentabout.qname;        (%ContentExpression;) >
+<!ELEMENT %domainofapplication.qname; (%ContentExpression;) >
+
+<!-- ............................................................. -->
+<!-- Presentation layout schemata contain tokens,
+     layout and content schemata.
+-->
+
+<!ELEMENT %mstyle.qname;             (%PresExpression;) >
+<!ELEMENT %merror.qname;             (%PresExpression;) >
+<!ELEMENT %mphantom.qname;           (%PresExpression;) >
+<!ELEMENT %mrow.qname;               (%PresExpression;) >
+<!ELEMENT %mfrac.qname;              (%PresExpression;) >
+<!ELEMENT %msqrt.qname;              (%PresExpression;) >
+<!ELEMENT %menclose.qname;           (%PresExpression;) >
+<!ELEMENT %mroot.qname;              (%PresExpression;) >
+<!ELEMENT %msub.qname;               (%PresExpression;) >
+<!ELEMENT %msup.qname;               (%PresExpression;) >
+<!ELEMENT %msubsup.qname;            (%PresExpression;) >
+<!ELEMENT %mmultiscripts.qname;      (%PresExpression;) >
+<!ELEMENT %munder.qname;             (%PresExpression;) >
+<!ELEMENT %mover.qname;              (%PresExpression;) >
+<!ELEMENT %munderover.qname;         (%PresExpression;) >
+<!ELEMENT %mtable.qname;             (%PresExpression;) >
+<!ELEMENT %mtr.qname;                (%PresExpression;) >
+<!ELEMENT %mlabeledtr.qname;         (%PresExpression;) >
+<!ELEMENT %mtd.qname;                (%PresExpression;) >
+<!ELEMENT %maction.qname;            (%PresExpression;) >
+<!ELEMENT %mfenced.qname;            (%PresExpression;) >
+<!ELEMENT %mpadded.qname;            (%PresExpression;) >
+
+<!-- Presentation elements contain PCDATA or malignmark constructs. -->
+
+<!ELEMENT %mi.qname;                 (%MathMLCharacters; |
+      %malignmark.qname;)* >
+<!ELEMENT %mn.qname;                 (%MathMLCharacters; |
+      %malignmark.qname;)* >
+<!ELEMENT %mo.qname;                 (%MathMLCharacters; |
+      %malignmark.qname;)* >
+<!ELEMENT %mtext.qname;              (%MathMLCharacters; |
+      %malignmark.qname;)* >
+<!ELEMENT %ms.qname;                 (%MathMLCharacters; |
+      %malignmark.qname;)* >
+
+<!-- Browser interface definition  ............................... -->
+
+<!-- Attributes for top-level element "math" -->
+
+<!ENTITY % att-macros               
+     "macros       CDATA                    #IMPLIED" >
+<!ENTITY % att-mode                 
+     "mode         CDATA                    #IMPLIED" >
+<!ENTITY % att-display                
+     "display      CDATA                    #IMPLIED" >
+
+<!ENTITY % att-topinfo          
+     "%MATHML.Common.attrib;
+      %att-macros;
+      %att-mode;
+      %att-display;" >
+
+<!-- Attributes for browser interface element -->
+
+<!ENTITY % att-baseline             
+     "baseline     CDATA                    #IMPLIED" >
+<!ENTITY % att-overflow            
+     "overflow  ( scroll | elide | truncate | scale ) 'scroll'" >
+<!ENTITY % att-altimg               
+     "altimg       CDATA                    #IMPLIED" >
+<!ENTITY % att-alttext           
+     "alttext      CDATA                    #IMPLIED" >
+
+<!ENTITY % att-browif           
+     "%att-type;
+      %att-name;
+      %att-height;
+      %att-width;
+      %att-baseline;
+      %att-overflow;
+      %att-altimg;
+      %att-alttext;" >
+
+<!-- ............................................................. -->
+<!-- The top-level element "math" contains MathML encoded
+     mathematics. The "math" element has the browser info
+     attributes iff it is also the browser interface element.
+-->
+
+<!ELEMENT %math.qname;               (%MathExpression;) >
+
+<!ATTLIST %math.qname;
+      %att-topinfo;
+      %att-browif; >
+
+<!-- MathML Character Entities .............................................. -->
+<!ENTITY % mathml-charent.module "INCLUDE" >
+<![%mathml-charent.module;[
+
+<!-- New characters defined by MathML ............................ -->
+
+<!ENTITY % ent-mmlextra
+      PUBLIC "-//W3C//ENTITIES Extra for MathML 2.0//EN"
+             "mmlextra.ent" >
+%ent-mmlextra;
+
+<!-- MathML aliases for characters defined above ................. -->
+
+<!ENTITY % ent-mmlalias
+      PUBLIC "-//W3C//ENTITIES Aiases for MathML 2.0//EN"
+             "mmlalias.ent" >
+%ent-mmlalias;
+
+<!-- end of MathML Character Entity section -->]]>
+
+<!-- Revision History:
+
+       Initial draft (syntax = XML) 1997-05-09
+          Stephen Buswell
+       Revised 1997-05-14
+          Robert Miner
+       Revised 1997-06-29 and 1997-07-02
+          Stephen Buswell
+       Revised 1997-12-15
+          Stephen Buswell
+       Revised 1998-02-08
+          Stephen Buswell
+       Revised 1998-04-04
+          Stephen Buswell
+       Entities and small revisions 1999-02-21
+          David Carlisle
+       Added attribute definitionURL to ci and cn 1999-10-11
+          Nico Poppelier
+       Additions for MathML 2  1999-12-16
+          David Carlisle
+       Namespace support 2000-01-14
+          David Carlisle
+       XHTML Compatibility 2000-02-23
+          Murray Altheim
+       New content elements 2000-03-26
+          David Carlisle
+       Further revisions for MathML2 CR draft 2000-07-11
+          David Carlisle
+       Further revisions for MathML2 CR draft 2000-10-31
+          David Carlisle
+
+-->
+
+<!-- end of MathML 2.0 DTD  ................................................ -->
+<!-- ....................................................................... -->
+
+
diff --git a/dtd/mathml3-qname1.mod b/dtd/mathml3-qname1.mod
new file mode 100644
index 0000000..254bdb2
--- /dev/null
+++ b/dtd/mathml3-qname1.mod
@@ -0,0 +1,294 @@
+<!-- ....................................................................... -->
+<!-- MathML Qualified Names Module  ........................................ -->
+<!-- file: mathml3-qname-1.mod
+
+     This is the Mathematical Markup Language (MathML) 2.0, an XML 
+     application for describing mathematical notation and capturing 
+     both its structure and content.
+
+     Copyright 1998-2010 W3C (MIT, INRIA, Keio), All Rights Reserved.
+
+     This DTD module is identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//ENTITIES MathML 3.0 Qualified Names 1.0//EN"
+       SYSTEM "mathml3-qname.mod"
+
+     Revisions:
+     (none)
+     ....................................................................... -->
+
+<!-- MathML Qualified Names
+
+     This module is contained in two parts, labeled Section 'A' and 'B':
+
+       Section A declares parameter entities to support namespace-
+       qualified names, namespace declarations, and name prefixing 
+       for MathML.
+    
+       Section B declares parameter entities used to provide
+       namespace-qualified names for all MathML element types.
+
+     This module is derived from the XHTML Qualified Names Template module.
+-->
+
+<!-- Section A: XHTML XML Namespace Framework :::::::::::::::::::: -->
+
+<!ENTITY % NS.prefixed     "IGNORE" >
+<!ENTITY % MATHML.prefixed "%NS.prefixed;" >
+
+<!-- XLink ............... -->
+
+<!ENTITY % XLINK.prefix         "xlink" >		
+<!ENTITY % XLINK.xmlns "http://www.w3.org/1999/xlink" >
+<!ENTITY % XLINK.xmlns.attrib
+     "xmlns:%XLINK.prefix;  CDATA           #FIXED '%XLINK.xmlns;'"
+>
+
+<!-- W3C XML Schema ............... -->
+
+<!ENTITY % Schema.prefix         "xsi" >		
+<!ENTITY % Schema.xmlns "http://www.w3.org/2001/XMLSchema-instance" >
+<!ENTITY % Schema.xmlns.attrib
+     "xmlns:%Schema.prefix;  CDATA           #IMPLIED"
+>
+
+<!-- MathML .............. -->
+
+<!ENTITY % MATHML.xmlns    "http://www.w3.org/1998/Math/MathML" >
+<!ENTITY % MATHML.prefix   "m" >
+<![%MATHML.prefixed;[
+<!ENTITY % MATHML.xmlns.extra.attrib  "" >
+]]>
+<!ENTITY % MATHML.xmlns.extra.attrib 
+     "%XLINK.xmlns.attrib; 
+      %Schema.xmlns.attrib;" >
+
+<![%MATHML.prefixed;[
+<!ENTITY % MATHML.pfx  "%MATHML.prefix;:" >
+<!ENTITY % MATHML.xmlns.attrib
+     "xmlns:%MATHML.prefix;  CDATA   #FIXED '%MATHML.xmlns;'
+      %MATHML.xmlns.extra.attrib;"
+>
+]]>
+<!ENTITY % MATHML.pfx  "" >
+<!ENTITY % MATHML.xmlns.attrib
+     "xmlns        CDATA           #FIXED '%MATHML.xmlns;'
+      %MATHML.xmlns.extra.attrib;"
+>
+
+<![%NS.prefixed;[
+<!ENTITY % XHTML.xmlns.extra.attrib 
+     "%MATHML.xmlns.attrib;" >
+]]>
+<!ENTITY % XHTML.xmlns.extra.attrib
+     "%XLINK.xmlns.attrib;
+      %Schema.xmlns.attrib;"
+>
+
+
+<!-- ignores subsequent instantiation of this module when
+     used as external subset rather than module fragment.
+     NOTE: Do not modify this parameter entity, otherwise
+     a recursive parsing situation may result.
+-->
+<!ENTITY % mathml-qname.module "IGNORE" >
+
+<!-- Section B: MathML Qualified Names ::::::::::::::::::::::::::::: -->
+
+<!-- 9. This section declares parameter entities used to provide
+        namespace-qualified names for all MathML element types.
+-->
+
+<!ENTITY % abs.qname "%MATHML.pfx;abs" >
+<!ENTITY % and.qname "%MATHML.pfx;and" >
+<!ENTITY % annotation-xml.qname "%MATHML.pfx;annotation-xml" >
+<!ENTITY % annotation.qname "%MATHML.pfx;annotation" >
+<!ENTITY % apply.qname "%MATHML.pfx;apply" >
+<!ENTITY % approx.qname "%MATHML.pfx;approx" >
+<!ENTITY % arccos.qname "%MATHML.pfx;arccos" >
+<!ENTITY % arccosh.qname "%MATHML.pfx;arccosh" >
+<!ENTITY % arccot.qname "%MATHML.pfx;arccot" >
+<!ENTITY % arccoth.qname "%MATHML.pfx;arccoth" >
+<!ENTITY % arccsc.qname "%MATHML.pfx;arccsc" >
+<!ENTITY % arccsch.qname "%MATHML.pfx;arccsch" >
+<!ENTITY % arcsec.qname "%MATHML.pfx;arcsec" >
+<!ENTITY % arcsech.qname "%MATHML.pfx;arcsech" >
+<!ENTITY % arcsin.qname "%MATHML.pfx;arcsin" >
+<!ENTITY % arcsinh.qname "%MATHML.pfx;arcsinh" >
+<!ENTITY % arctan.qname "%MATHML.pfx;arctan" >
+<!ENTITY % arctanh.qname "%MATHML.pfx;arctanh" >
+<!ENTITY % arg.qname "%MATHML.pfx;arg" >
+<!ENTITY % bind.qname "%MATHML.pfx;bind" >
+<!ENTITY % bvar.qname "%MATHML.pfx;bvar" >
+<!ENTITY % card.qname "%MATHML.pfx;card" >
+<!ENTITY % cartesianproduct.qname "%MATHML.pfx;cartesianproduct" >
+<!ENTITY % cbytes.qname "%MATHML.pfx;cbytes" >
+<!ENTITY % ceiling.qname "%MATHML.pfx;ceiling" >
+<!ENTITY % cerror.qname "%MATHML.pfx;cerror" >
+<!ENTITY % ci.qname "%MATHML.pfx;ci" >
+<!ENTITY % cn.qname "%MATHML.pfx;cn" >
+<!ENTITY % codomain.qname "%MATHML.pfx;codomain" >
+<!ENTITY % complexes.qname "%MATHML.pfx;complexes" >
+<!ENTITY % compose.qname "%MATHML.pfx;compose" >
+<!ENTITY % condition.qname "%MATHML.pfx;condition" >
+<!ENTITY % conjugate.qname "%MATHML.pfx;conjugate" >
+<!ENTITY % cos.qname "%MATHML.pfx;cos" >
+<!ENTITY % cosh.qname "%MATHML.pfx;cosh" >
+<!ENTITY % cot.qname "%MATHML.pfx;cot" >
+<!ENTITY % coth.qname "%MATHML.pfx;coth" >
+<!ENTITY % cs.qname "%MATHML.pfx;cs" >
+<!ENTITY % csc.qname "%MATHML.pfx;csc" >
+<!ENTITY % csch.qname "%MATHML.pfx;csch" >
+<!ENTITY % csymbol.qname "%MATHML.pfx;csymbol" >
+<!ENTITY % curl.qname "%MATHML.pfx;curl" >
+<!ENTITY % declare.qname "%MATHML.pfx;declare" >
+<!ENTITY % degree.qname "%MATHML.pfx;degree" >
+<!ENTITY % determinant.qname "%MATHML.pfx;determinant" >
+<!ENTITY % diff.qname "%MATHML.pfx;diff" >
+<!ENTITY % divergence.qname "%MATHML.pfx;divergence" >
+<!ENTITY % divide.qname "%MATHML.pfx;divide" >
+<!ENTITY % domain.qname "%MATHML.pfx;domain" >
+<!ENTITY % domainofapplication.qname "%MATHML.pfx;domainofapplication" >
+<!ENTITY % emptyset.qname "%MATHML.pfx;emptyset" >
+<!ENTITY % eq.qname "%MATHML.pfx;eq" >
+<!ENTITY % equivalent.qname "%MATHML.pfx;equivalent" >
+<!ENTITY % eulergamma.qname "%MATHML.pfx;eulergamma" >
+<!ENTITY % exists.qname "%MATHML.pfx;exists" >
+<!ENTITY % exp.qname "%MATHML.pfx;exp" >
+<!ENTITY % exponentiale.qname "%MATHML.pfx;exponentiale" >
+<!ENTITY % factorial.qname "%MATHML.pfx;factorial" >
+<!ENTITY % factorof.qname "%MATHML.pfx;factorof" >
+<!ENTITY % false.qname "%MATHML.pfx;false" >
+<!ENTITY % floor.qname "%MATHML.pfx;floor" >
+<!ENTITY % fn.qname "%MATHML.pfx;fn" >
+<!ENTITY % forall.qname "%MATHML.pfx;forall" >
+<!ENTITY % gcd.qname "%MATHML.pfx;gcd" >
+<!ENTITY % geq.qname "%MATHML.pfx;geq" >
+<!ENTITY % grad.qname "%MATHML.pfx;grad" >
+<!ENTITY % gt.qname "%MATHML.pfx;gt" >
+<!ENTITY % ident.qname "%MATHML.pfx;ident" >
+<!ENTITY % image.qname "%MATHML.pfx;image" >
+<!ENTITY % imaginary.qname "%MATHML.pfx;imaginary" >
+<!ENTITY % imaginaryi.qname "%MATHML.pfx;imaginaryi" >
+<!ENTITY % implies.qname "%MATHML.pfx;implies" >
+<!ENTITY % in.qname "%MATHML.pfx;in" >
+<!ENTITY % infinity.qname "%MATHML.pfx;infinity" >
+<!ENTITY % int.qname "%MATHML.pfx;int" >
+<!ENTITY % integers.qname "%MATHML.pfx;integers" >
+<!ENTITY % intersect.qname "%MATHML.pfx;intersect" >
+<!ENTITY % interval.qname "%MATHML.pfx;interval" >
+<!ENTITY % inverse.qname "%MATHML.pfx;inverse" >
+<!ENTITY % lambda.qname "%MATHML.pfx;lambda" >
+<!ENTITY % laplacian.qname "%MATHML.pfx;laplacian" >
+<!ENTITY % lcm.qname "%MATHML.pfx;lcm" >
+<!ENTITY % leq.qname "%MATHML.pfx;leq" >
+<!ENTITY % limit.qname "%MATHML.pfx;limit" >
+<!ENTITY % list.qname "%MATHML.pfx;list" >
+<!ENTITY % ln.qname "%MATHML.pfx;ln" >
+<!ENTITY % log.qname "%MATHML.pfx;log" >
+<!ENTITY % logbase.qname "%MATHML.pfx;logbase" >
+<!ENTITY % lowlimit.qname "%MATHML.pfx;lowlimit" >
+<!ENTITY % lt.qname "%MATHML.pfx;lt" >
+<!ENTITY % maction.qname "%MATHML.pfx;maction" >
+<!ENTITY % maligngroup.qname "%MATHML.pfx;maligngroup" >
+<!ENTITY % malignmark.qname "%MATHML.pfx;malignmark" >
+<!ENTITY % math.qname "%MATHML.pfx;math" >
+<!ENTITY % matrix.qname "%MATHML.pfx;matrix" >
+<!ENTITY % matrixrow.qname "%MATHML.pfx;matrixrow" >
+<!ENTITY % max.qname "%MATHML.pfx;max" >
+<!ENTITY % mean.qname "%MATHML.pfx;mean" >
+<!ENTITY % median.qname "%MATHML.pfx;median" >
+<!ENTITY % menclose.qname "%MATHML.pfx;menclose" >
+<!ENTITY % merror.qname "%MATHML.pfx;merror" >
+<!ENTITY % mfenced.qname "%MATHML.pfx;mfenced" >
+<!ENTITY % mfrac.qname "%MATHML.pfx;mfrac" >
+<!ENTITY % mglyph.qname "%MATHML.pfx;mglyph" >
+<!ENTITY % mi.qname "%MATHML.pfx;mi" >
+<!ENTITY % min.qname "%MATHML.pfx;min" >
+<!ENTITY % minus.qname "%MATHML.pfx;minus" >
+<!ENTITY % mlabeledtr.qname "%MATHML.pfx;mlabeledtr" >
+<!ENTITY % mlongdiv.qname "%MATHML.pfx;mlongdiv" >
+<!ENTITY % mmultiscripts.qname "%MATHML.pfx;mmultiscripts" >
+<!ENTITY % mn.qname "%MATHML.pfx;mn" >
+<!ENTITY % mo.qname "%MATHML.pfx;mo" >
+<!ENTITY % mode.qname "%MATHML.pfx;mode" >
+<!ENTITY % moment.qname "%MATHML.pfx;moment" >
+<!ENTITY % momentabout.qname "%MATHML.pfx;momentabout" >
+<!ENTITY % mover.qname "%MATHML.pfx;mover" >
+<!ENTITY % mpadded.qname "%MATHML.pfx;mpadded" >
+<!ENTITY % mphantom.qname "%MATHML.pfx;mphantom" >
+<!ENTITY % mprescripts.qname "%MATHML.pfx;mprescripts" >
+<!ENTITY % mroot.qname "%MATHML.pfx;mroot" >
+<!ENTITY % mrow.qname "%MATHML.pfx;mrow" >
+<!ENTITY % ms.qname "%MATHML.pfx;ms" >
+<!ENTITY % mscarries.qname "%MATHML.pfx;mscarries" >
+<!ENTITY % mscarry.qname "%MATHML.pfx;mscarry" >
+<!ENTITY % msgroup.qname "%MATHML.pfx;msgroup" >
+<!ENTITY % msline.qname "%MATHML.pfx;msline" >
+<!ENTITY % mspace.qname "%MATHML.pfx;mspace" >
+<!ENTITY % msqrt.qname "%MATHML.pfx;msqrt" >
+<!ENTITY % msrow.qname "%MATHML.pfx;msrow" >
+<!ENTITY % mstack.qname "%MATHML.pfx;mstack" >
+<!ENTITY % mstyle.qname "%MATHML.pfx;mstyle" >
+<!ENTITY % msub.qname "%MATHML.pfx;msub" >
+<!ENTITY % msubsup.qname "%MATHML.pfx;msubsup" >
+<!ENTITY % msup.qname "%MATHML.pfx;msup" >
+<!ENTITY % mtable.qname "%MATHML.pfx;mtable" >
+<!ENTITY % mtd.qname "%MATHML.pfx;mtd" >
+<!ENTITY % mtext.qname "%MATHML.pfx;mtext" >
+<!ENTITY % mtr.qname "%MATHML.pfx;mtr" >
+<!ENTITY % munder.qname "%MATHML.pfx;munder" >
+<!ENTITY % munderover.qname "%MATHML.pfx;munderover" >
+<!ENTITY % naturalnumbers.qname "%MATHML.pfx;naturalnumbers" >
+<!ENTITY % neq.qname "%MATHML.pfx;neq" >
+<!ENTITY % none.qname "%MATHML.pfx;none" >
+<!ENTITY % not.qname "%MATHML.pfx;not" >
+<!ENTITY % notanumber.qname "%MATHML.pfx;notanumber" >
+<!ENTITY % notin.qname "%MATHML.pfx;notin" >
+<!ENTITY % notprsubset.qname "%MATHML.pfx;notprsubset" >
+<!ENTITY % notsubset.qname "%MATHML.pfx;notsubset" >
+<!ENTITY % or.qname "%MATHML.pfx;or" >
+<!ENTITY % otherwise.qname "%MATHML.pfx;otherwise" >
+<!ENTITY % outerproduct.qname "%MATHML.pfx;outerproduct" >
+<!ENTITY % partialdiff.qname "%MATHML.pfx;partialdiff" >
+<!ENTITY % pi.qname "%MATHML.pfx;pi" >
+<!ENTITY % piece.qname "%MATHML.pfx;piece" >
+<!ENTITY % piecewise.qname "%MATHML.pfx;piecewise" >
+<!ENTITY % plus.qname "%MATHML.pfx;plus" >
+<!ENTITY % power.qname "%MATHML.pfx;power" >
+<!ENTITY % primes.qname "%MATHML.pfx;primes" >
+<!ENTITY % product.qname "%MATHML.pfx;product" >
+<!ENTITY % prsubset.qname "%MATHML.pfx;prsubset" >
+<!ENTITY % quotient.qname "%MATHML.pfx;quotient" >
+<!ENTITY % rationals.qname "%MATHML.pfx;rationals" >
+<!ENTITY % real.qname "%MATHML.pfx;real" >
+<!ENTITY % reals.qname "%MATHML.pfx;reals" >
+<!ENTITY % reln.qname "%MATHML.pfx;reln" >
+<!ENTITY % rem.qname "%MATHML.pfx;rem" >
+<!ENTITY % root.qname "%MATHML.pfx;root" >
+<!ENTITY % scalarproduct.qname "%MATHML.pfx;scalarproduct" >
+<!ENTITY % sdev.qname "%MATHML.pfx;sdev" >
+<!ENTITY % sec.qname "%MATHML.pfx;sec" >
+<!ENTITY % sech.qname "%MATHML.pfx;sech" >
+<!ENTITY % selector.qname "%MATHML.pfx;selector" >
+<!ENTITY % semantics.qname "%MATHML.pfx;semantics" >
+<!ENTITY % sep.qname "%MATHML.pfx;sep" >
+<!ENTITY % set.qname "%MATHML.pfx;set" >
+<!ENTITY % setdiff.qname "%MATHML.pfx;setdiff" >
+<!ENTITY % share.qname "%MATHML.pfx;share" >
+<!ENTITY % sin.qname "%MATHML.pfx;sin" >
+<!ENTITY % sinh.qname "%MATHML.pfx;sinh" >
+<!ENTITY % subset.qname "%MATHML.pfx;subset" >
+<!ENTITY % sum.qname "%MATHML.pfx;sum" >
+<!ENTITY % tan.qname "%MATHML.pfx;tan" >
+<!ENTITY % tanh.qname "%MATHML.pfx;tanh" >
+<!ENTITY % tendsto.qname "%MATHML.pfx;tendsto" >
+<!ENTITY % times.qname "%MATHML.pfx;times" >
+<!ENTITY % transpose.qname "%MATHML.pfx;transpose" >
+<!ENTITY % true.qname "%MATHML.pfx;true" >
+<!ENTITY % union.qname "%MATHML.pfx;union" >
+<!ENTITY % uplimit.qname "%MATHML.pfx;uplimit" >
+<!ENTITY % variance.qname "%MATHML.pfx;variance" >
+<!ENTITY % vector.qname "%MATHML.pfx;vector" >
+<!ENTITY % vectorproduct.qname "%MATHML.pfx;vectorproduct" >
+<!ENTITY % xor.qname "%MATHML.pfx;xor" >
diff --git a/dtd/mathml3.dtd b/dtd/mathml3.dtd
new file mode 100644
index 0000000..3a8886e
--- /dev/null
+++ b/dtd/mathml3.dtd
@@ -0,0 +1,1682 @@
+<!-- ================================================================= -->
+<!-- IEEE NISO JATS MODS                    Name Collisions 03/02/2012
+
+The following changes have been made (with the permission of the
+W3C MathML Committee), to this DTD:
+
+1) %product.class; is defined below and also defined in 
+JATS-default-classes.ent. Renamed class in the MathML DTD
+until JATS names can be changed. Renamed the parameter entity
+to "mml-product.class".
+
+2) The parameter entity named "name" was commented out. It is never
+used in the MathML 3.0 DTD, and its presence causes processing
+errors in the Mulberry Tag LIbrary software.
+
+3) id CDATA #IMPLIED ==> id ID #implied
+
+-->
+<!-- ================================================================= -->
+
+<!-- MathML 3.0 DTD  ....................................................... -->
+<!-- file: mathml3.dtd
+-->
+
+<!-- MathML 3.0 DTD
+
+     This is the Mathematical Markup Language (MathML) 3.0, an XML
+     application for describing mathematical notation and capturing
+     both its structure and content.
+
+     Copyright &#xa9; 1998-2010 W3C&#xae; (MIT, ERCIM, Keio), All Rights 
+     Reserved. W3C liability, trademark, document use and software
+     licensing rules apply. 
+
+     Permission to use, copy, modify and distribute the MathML 2.0 DTD and
+     its accompanying documentation for any purpose and without fee is
+     hereby granted in perpetuity, provided that the above copyright notice
+     and this paragraph appear in all copies.  The copyright holders make
+     no representation about the suitability of the DTD for any purpose.
+
+     It is provided "as is" without expressed or implied warranty.
+
+     This entity may be identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//DTD MathML 3.0//EN"
+       SYSTEM "mathml3.dtd"
+
+     Revisions: editor and revision history at EOF
+-->
+<!-- Entity used to enable marked sections which enforces stricter		
+     checking of MathML syntax rules		
+-->
+<!ENTITY % MathMLstrict "IGNORE">		
+
+<!-- MathML Qualified Names module ............................... -->
+<!ENTITY % mathml-qname.module "INCLUDE" >
+<![%mathml-qname.module;[
+<!ENTITY % mathml-qname.mod
+     PUBLIC "-//W3C//ENTITIES MathML 3.0 Qualified Names 1.0//EN"
+            "mathml3-qname.mod" >
+%mathml-qname.mod;]]>
+
+<!-- if %NS.prefixed; is INCLUDE, include all NS attributes, 
+     otherwise just those associated with MathML
+-->
+<![%NS.prefixed;[
+  <!ENTITY % MATHML.NamespaceDecl.attrib 
+         "%NamespaceDecl.attrib;"
+>
+]]>
+<!ENTITY % MATHML.NamespaceDecl.attrib 
+     "%MATHML.xmlns.attrib;"
+>
+
+
+<!-- MathML Character Entities .............................................. -->
+<!ENTITY % mathml-charent.module "INCLUDE" >
+<![%mathml-charent.module;[
+
+
+<!ENTITY % isobox PUBLIC "-//W3C//ENTITIES Box and Line Drawing//EN" "isobox.ent">
+%isobox;
+<!ENTITY % isocyr1 PUBLIC "-//W3C//ENTITIES Russian Cyrillic//EN" "isocyr1.ent">
+%isocyr1;
+<!ENTITY % isocyr2 PUBLIC "-//W3C//ENTITIES Non-Russian Cyrillic//EN" "isocyr2.ent">
+%isocyr2;
+<!ENTITY % isodia PUBLIC "-//W3C//ENTITIES Diacritical Marks//EN" "isodia.ent">
+%isodia;
+<!ENTITY % isolat1 PUBLIC "-//W3C//ENTITIES Added Latin 1//EN" "isolat1.ent">
+%isolat1;
+<!ENTITY % isolat2 PUBLIC "-//W3C//ENTITIES Added Latin 2//EN" "isolat2.ent">
+%isolat2;
+<!ENTITY % isonum PUBLIC "-//W3C//ENTITIES Numeric and Special Graphic//EN" "isonum.ent">
+%isonum;
+<!ENTITY % isopub PUBLIC "-//W3C//ENTITIES Publishing//EN" "isopub.ent">
+%isopub;
+<!ENTITY % isoamsa PUBLIC "-//W3C//ENTITIES Added Math Symbols: Arrow Relations//EN" "isoamsa.ent">
+%isoamsa;
+<!ENTITY % isoamsb PUBLIC "-//W3C//ENTITIES Added Math Symbols: Binary Operators//EN" "isoamsb.ent">
+%isoamsb;
+<!ENTITY % isoamsc PUBLIC "-//W3C//ENTITIES Added Math Symbols: Delimiters//EN" "isoamsc.ent">
+%isoamsc;
+<!ENTITY % isoamsn PUBLIC "-//W3C//ENTITIES Added Math Symbols: Negated Relations//EN" "isoamsn.ent">
+%isoamsn;
+<!ENTITY % isoamso PUBLIC "-//W3C//ENTITIES Added Math Symbols: Ordinary//EN" "isoamso.ent">
+%isoamso;
+<!ENTITY % isoamsr PUBLIC "-//W3C//ENTITIES Added Math Symbols: Relations//EN" "isoamsr.ent">
+%isoamsr;
+<!ENTITY % isogrk3 PUBLIC "-//W3C//ENTITIES Greek Symbols//EN" "isogrk3.ent">
+%isogrk3;
+<!ENTITY % isomfrk PUBLIC "-//W3C//ENTITIES Math Alphabets: Fraktur//EN" "isomfrk.ent">
+%isomfrk;
+<!ENTITY % isomopf PUBLIC "-//W3C//ENTITIES Math Alphabets: Open Face//EN" "isomopf.ent">
+%isomopf;
+<!ENTITY % isomscr PUBLIC "-//W3C//ENTITIES Math Alphabets: Script//EN" "isomscr.ent">
+%isomscr;
+<!ENTITY % isotech PUBLIC "-//W3C//ENTITIES General Technical//EN" "isotech.ent">
+%isotech;
+<!ENTITY % mmlextra PUBLIC "-//W3C//ENTITIES Additional MathML Symbols//EN" "mmlextra.ent">
+%mmlextra;
+<!ENTITY % mmlalias PUBLIC "-//W3C//ENTITIES MathML Aliases//EN" "mmlalias.ent">
+%mmlalias;
+
+<!-- end of MathML Character Entity section -->]]>
+
+
+
+<!ENTITY % MalignExpression "%maligngroup.qname;|%malignmark.qname;">
+
+<!ENTITY % TokenExpression "%mi.qname;|%mn.qname;|%mo.qname;|%mtext.qname;
+                            |%mspace.qname;|%ms.qname;">
+
+<!ENTITY % PresentationExpression "%TokenExpression;|%MalignExpression;
+                                   |%mrow.qname;|%mfrac.qname;|%msqrt.qname;
+                                   |%mroot.qname;|%mstyle.qname;
+                                   |%merror.qname;|%mpadded.qname;
+                                   |%mphantom.qname;|%mfenced.qname;
+                                   |%menclose.qname;|%msub.qname;|%msup.qname;
+                                   |%msubsup.qname;|%munder.qname;
+                                   |%mover.qname;|%munderover.qname;
+                                   |%mmultiscripts.qname;|%mtable.qname;
+                                   |%mstack.qname;|%mlongdiv.qname;
+                                   |%maction.qname;">
+
+<!-- end of mathml3-strict-content.rng -->
+
+<!ENTITY % cn.content "(#PCDATA|%mglyph.qname;|%sep.qname;
+                        |%PresentationExpression;)*">
+
+<!-- start of mathml3-content.rng -->
+
+<!-- start of mathml3-strict-content.rng -->
+
+<!ELEMENT %cn.qname; %cn.content;>
+
+<!ENTITY % ci.content "(#PCDATA|%mglyph.qname;
+                        |%PresentationExpression;)*">
+
+<!ELEMENT %ci.qname; %ci.content;>
+
+<!ENTITY % csymbol.content "(#PCDATA|%mglyph.qname;
+                             |%PresentationExpression;)*">
+
+<!ELEMENT %csymbol.qname; %csymbol.content;>
+
+<!ENTITY % SymbolName "#PCDATA">
+
+<!ENTITY % BvarQ "(%bvar.qname;)*">
+
+<!ENTITY % DomainQ "(%domainofapplication.qname;|%condition.qname;
+                     |(%lowlimit.qname;,%uplimit.qname;?))*">
+
+<!ENTITY % constant-arith.class "%exponentiale.qname;|%imaginaryi.qname;
+                                 |%notanumber.qname;|%true.qname;
+                                 |%false.qname;|%pi.qname;|%eulergamma.qname;
+                                 |%infinity.qname;">
+
+<!ENTITY % constant-set.class "%integers.qname;|%reals.qname;
+                               |%rationals.qname;|%naturalnumbers.qname;
+                               |%complexes.qname;|%primes.qname;
+                               |%emptyset.qname;">
+
+<!ENTITY % binary-linalg.class "%vectorproduct.qname;|%scalarproduct.qname;
+                                |%outerproduct.qname;">
+
+<!ENTITY % nary-linalg.class "%selector.qname;">
+
+<!ENTITY % unary-linalg.class "%determinant.qname;|%transpose.qname;">
+
+<!ENTITY % nary-constructor.class "%vector.qname;|%matrix.qname;
+                                   |%matrixrow.qname;">
+
+<!ENTITY % nary-stats.class "%mean.qname;|%sdev.qname;|%variance.qname;
+                             |%median.qname;|%mode.qname;">
+
+<!ENTITY % unary-elementary.class "%sin.qname;|%cos.qname;|%tan.qname;
+                                   |%sec.qname;|%csc.qname;|%cot.qname;
+                                   |%sinh.qname;|%cosh.qname;|%tanh.qname;
+                                   |%sech.qname;|%csch.qname;|%coth.qname;
+                                   |%arcsin.qname;|%arccos.qname;
+                                   |%arctan.qname;|%arccosh.qname;
+                                   |%arccot.qname;|%arccoth.qname;
+                                   |%arccsc.qname;|%arccsch.qname;
+                                   |%arcsec.qname;|%arcsech.qname;
+                                   |%arcsinh.qname;|%arctanh.qname;">
+
+<!ENTITY % limit.class "%limit.qname;">
+
+<!ENTITY % mml-product.class "%product.qname;">
+
+<!ENTITY % sum.class "%sum.qname;">
+
+<!ENTITY % unary-set.class "%card.qname;">
+
+<!ENTITY % nary-set-reln.class "%subset.qname;|%prsubset.qname;">
+
+<!ENTITY % binary-set.class "%in.qname;|%notin.qname;|%notsubset.qname;
+                             |%notprsubset.qname;|%setdiff.qname;">
+
+<!ENTITY % nary-set.class "%union.qname;|%intersect.qname;
+                           |%cartesianproduct.qname;">
+
+<!ENTITY % nary-setlist-constructor.class "%set.qname;|%list.qname;">
+
+<!ENTITY % unary-veccalc.class "%divergence.qname;|%grad.qname;|%curl.qname;
+                                |%laplacian.qname;">
+
+<!ENTITY % partialdiff.class "%partialdiff.qname;">
+
+<!ENTITY % Differential-Operator.class "%diff.qname;">
+
+<!ENTITY % int.class "%int.qname;">
+
+<!ENTITY % binary-reln.class "%neq.qname;|%approx.qname;|%factorof.qname;
+                              |%tendsto.qname;">
+
+<!ENTITY % nary-reln.class "%eq.qname;|%gt.qname;|%lt.qname;|%geq.qname;
+                            |%leq.qname;">
+
+<!ENTITY % quantifier.class "%forall.qname;|%exists.qname;">
+
+<!ENTITY % binary-logical.class "%implies.qname;|%equivalent.qname;">
+
+<!ENTITY % unary-logical.class "%not.qname;">
+
+<!ENTITY % nary-logical.class "%and.qname;|%or.qname;|%xor.qname;">
+
+<!ENTITY % nary-arith.class "%plus.qname;|%times.qname;|%gcd.qname;
+                             |%lcm.qname;">
+
+<!ENTITY % nary-minmax.class "%max.qname;|%min.qname;">
+
+<!ENTITY % unary-arith.class "%factorial.qname;|%abs.qname;|%conjugate.qname;
+                              |%arg.qname;|%real.qname;|%imaginary.qname;
+                              |%floor.qname;|%ceiling.qname;|%exp.qname;">
+
+<!ENTITY % binary-arith.class "%quotient.qname;|%divide.qname;|%minus.qname;
+                               |%power.qname;|%rem.qname;|%root.qname;">
+
+<!ENTITY % nary-functional.class "%compose.qname;">
+
+<!ENTITY % lambda.class "%lambda.qname;">
+
+<!ENTITY % unary-functional.class "%inverse.qname;|%ident.qname;
+                                   |%domain.qname;|%codomain.qname;
+                                   |%image.qname;|%ln.qname;|%log.qname;
+                                   |%moment.qname;">
+
+<!ENTITY % interval.class "%interval.qname;">
+
+<!ENTITY % DeprecatedContExp "%reln.qname;|%fn.qname;|%declare.qname;">
+
+<!ENTITY % CommonDeprecatedAtt "
+  other CDATA #IMPLIED">
+
+<!ENTITY % Qualifier "(%DomainQ;)|%degree.qname;|%momentabout.qname;
+                      |%logbase.qname;">
+
+<!ENTITY % ContExp "%piecewise.qname;|%DeprecatedContExp;|%interval.class;
+                    |%unary-functional.class;|%lambda.class;
+                    |%nary-functional.class;|%binary-arith.class;
+                    |%unary-arith.class;|%nary-minmax.class;
+                    |%nary-arith.class;|%nary-logical.class;
+                    |%unary-logical.class;|%binary-logical.class;
+                    |%quantifier.class;|%nary-reln.class;
+                    |%binary-reln.class;|%int.class;
+                    |%Differential-Operator.class;|%partialdiff.class;
+                    |%unary-veccalc.class;
+                    |%nary-setlist-constructor.class;|%nary-set.class;
+                    |%binary-set.class;|%nary-set-reln.class;
+                    |%unary-set.class;|%sum.class;|%mml-product.class;
+                    |%limit.class;|%unary-elementary.class;
+                    |%nary-stats.class;|%nary-constructor.class;
+                    |%unary-linalg.class;|%nary-linalg.class;
+                    |%binary-linalg.class;|%constant-set.class;
+                    |%constant-arith.class;|%semantics.qname;|%cn.qname;
+                    |%ci.qname;|%csymbol.qname;|%apply.qname;|%bind.qname;
+                    |%share.qname;|%cerror.qname;|%cbytes.qname;|%cs.qname;">
+
+<!ENTITY % CommonAtt "
+%MATHML.NamespaceDecl.attrib;
+  %XLINK.prefix;:href   CDATA #IMPLIED	
+  %XLINK.prefix;:type   CDATA #IMPLIED
+  xml:lang   CDATA #IMPLIED
+  xml:space   (default|preserve) #IMPLIED
+  id ID #IMPLIED
+  xref CDATA #IMPLIED
+  class CDATA #IMPLIED
+  style CDATA #IMPLIED
+  href CDATA #IMPLIED
+  %CommonDeprecatedAtt;">
+
+<!ENTITY % apply.content "(%ContExp;),(%BvarQ;),(%Qualifier;)*,
+                          (%ContExp;)*">
+
+<!ELEMENT %apply.qname; (%apply.content;)>
+<!ATTLIST %apply.qname;
+  %CommonAtt;>
+
+<!ENTITY % bind.content "%apply.content;">
+
+<!ELEMENT %bind.qname; (%bind.content;)>
+<!ATTLIST %bind.qname;
+  %CommonAtt;>
+
+<!ENTITY % src "
+  src CDATA #IMPLIED">
+
+<!ELEMENT %share.qname; EMPTY>
+<!ATTLIST %share.qname;
+  %CommonAtt;
+  %src;>
+
+<!ELEMENT %cerror.qname; (%csymbol.qname;,(%ContExp;)*)>
+
+<!ATTLIST %cerror.qname;
+  %CommonAtt;>
+
+<!ELEMENT %cbytes.qname; (#PCDATA)>
+
+<!ENTITY % base64 "CDATA">
+
+<!ELEMENT %cs.qname; (#PCDATA)>
+
+<!ENTITY % DefEncAtt "
+  encoding CDATA #IMPLIED
+  definitionURL CDATA #IMPLIED">
+
+<!ATTLIST %cn.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  type CDATA #IMPLIED
+  base CDATA #IMPLIED>
+
+<!ATTLIST %ci.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  type CDATA #IMPLIED>
+
+<!ENTITY % ci.type "
+  type CDATA #REQUIRED">
+
+<!ATTLIST %csymbol.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  type CDATA #IMPLIED
+  cd CDATA #IMPLIED>
+
+<!ELEMENT %bvar.qname; ((%degree.qname;,(%ci.qname;|%semantics.qname;))
+                      |((%ci.qname;|%semantics.qname;),(%degree.qname;)?))>
+
+<!ATTLIST %cbytes.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ATTLIST %cs.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ENTITY % base "
+  base CDATA #REQUIRED">
+
+<!ELEMENT %sep.qname; EMPTY>
+
+<!ELEMENT %domainofapplication.qname; (%ContExp;)>
+
+<!ELEMENT %condition.qname; (%ContExp;)>
+
+<!ELEMENT %uplimit.qname; (%ContExp;)>
+
+<!ELEMENT %lowlimit.qname; (%ContExp;)>
+
+<!ELEMENT %degree.qname; (%ContExp;)>
+
+<!ELEMENT %momentabout.qname; (%ContExp;)>
+
+<!ELEMENT %logbase.qname; (%ContExp;)>
+
+<!ENTITY % type "
+  type CDATA #REQUIRED">
+
+<!ENTITY % order "
+  order (numeric|lexicographic) #REQUIRED">
+
+<!ENTITY % closure "
+  closure CDATA #REQUIRED">
+
+<!ELEMENT %piecewise.qname; (%piece.qname;|%otherwise.qname;)*>
+<!ATTLIST %piecewise.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %piece.qname; ((%ContExp;),(%ContExp;))>
+<!ATTLIST %piece.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %otherwise.qname; (%ContExp;)>
+<!ATTLIST %otherwise.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %reln.qname; (%ContExp;)*>
+
+<!ELEMENT %fn.qname; (%ContExp;)>
+
+<!ELEMENT %declare.qname; (%ContExp;)+>
+<!ATTLIST %declare.qname;
+  type CDATA #IMPLIED
+  scope CDATA #IMPLIED
+  nargs CDATA #IMPLIED
+  occurrence (prefix|infix|function-model) #IMPLIED
+  %DefEncAtt;>
+
+<!ELEMENT %interval.qname; ((%ContExp;),(%ContExp;))>
+<!ATTLIST %interval.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  closure CDATA #IMPLIED>
+
+<!ELEMENT %inverse.qname; EMPTY>
+<!ATTLIST %inverse.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %ident.qname; EMPTY>
+<!ATTLIST %ident.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %domain.qname; EMPTY>
+<!ATTLIST %domain.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %codomain.qname; EMPTY>
+<!ATTLIST %codomain.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %image.qname; EMPTY>
+<!ATTLIST %image.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %ln.qname; EMPTY>
+<!ATTLIST %ln.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %log.qname; EMPTY>
+<!ATTLIST %log.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %moment.qname; EMPTY>
+<!ATTLIST %moment.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %lambda.qname; ((%BvarQ;),(%DomainQ;),(%ContExp;))>
+<!ATTLIST %lambda.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %compose.qname; EMPTY>
+<!ATTLIST %compose.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %quotient.qname; EMPTY>
+<!ATTLIST %quotient.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %divide.qname; EMPTY>
+<!ATTLIST %divide.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %minus.qname; EMPTY>
+<!ATTLIST %minus.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %power.qname; EMPTY>
+<!ATTLIST %power.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %rem.qname; EMPTY>
+<!ATTLIST %rem.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %root.qname; EMPTY>
+<!ATTLIST %root.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %factorial.qname; EMPTY>
+<!ATTLIST %factorial.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %abs.qname; EMPTY>
+<!ATTLIST %abs.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %conjugate.qname; EMPTY>
+<!ATTLIST %conjugate.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arg.qname; EMPTY>
+<!ATTLIST %arg.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %real.qname; EMPTY>
+<!ATTLIST %real.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %imaginary.qname; EMPTY>
+<!ATTLIST %imaginary.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %floor.qname; EMPTY>
+<!ATTLIST %floor.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %ceiling.qname; EMPTY>
+<!ATTLIST %ceiling.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %exp.qname; EMPTY>
+<!ATTLIST %exp.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %max.qname; EMPTY>
+<!ATTLIST %max.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %min.qname; EMPTY>
+<!ATTLIST %min.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %plus.qname; EMPTY>
+<!ATTLIST %plus.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %times.qname; EMPTY>
+<!ATTLIST %times.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %gcd.qname; EMPTY>
+<!ATTLIST %gcd.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %lcm.qname; EMPTY>
+<!ATTLIST %lcm.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %and.qname; EMPTY>
+<!ATTLIST %and.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %or.qname; EMPTY>
+<!ATTLIST %or.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %xor.qname; EMPTY>
+<!ATTLIST %xor.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %not.qname; EMPTY>
+<!ATTLIST %not.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %implies.qname; EMPTY>
+<!ATTLIST %implies.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %equivalent.qname; EMPTY>
+<!ATTLIST %equivalent.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %forall.qname; EMPTY>
+<!ATTLIST %forall.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %exists.qname; EMPTY>
+<!ATTLIST %exists.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %eq.qname; EMPTY>
+<!ATTLIST %eq.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %gt.qname; EMPTY>
+<!ATTLIST %gt.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %lt.qname; EMPTY>
+<!ATTLIST %lt.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %geq.qname; EMPTY>
+<!ATTLIST %geq.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %leq.qname; EMPTY>
+<!ATTLIST %leq.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %neq.qname; EMPTY>
+<!ATTLIST %neq.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %approx.qname; EMPTY>
+<!ATTLIST %approx.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %factorof.qname; EMPTY>
+<!ATTLIST %factorof.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %tendsto.qname; EMPTY>
+<!ATTLIST %tendsto.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  type CDATA #IMPLIED>
+
+<!ELEMENT %int.qname; EMPTY>
+<!ATTLIST %int.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %diff.qname; EMPTY>
+<!ATTLIST %diff.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %partialdiff.qname; EMPTY>
+<!ATTLIST %partialdiff.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %divergence.qname; EMPTY>
+<!ATTLIST %divergence.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %grad.qname; EMPTY>
+<!ATTLIST %grad.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %curl.qname; EMPTY>
+<!ATTLIST %curl.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %laplacian.qname; EMPTY>
+<!ATTLIST %laplacian.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %set.qname; ((%BvarQ;)*,(%DomainQ;)*,(%ContExp;)*)>
+<!ATTLIST %set.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  type CDATA #IMPLIED>
+
+<!ELEMENT %list.qname; ((%BvarQ;)*,(%DomainQ;)*,(%ContExp;)*)>
+<!ATTLIST %list.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  order (numeric|lexicographic) #IMPLIED>
+
+<!ELEMENT %union.qname; EMPTY>
+<!ATTLIST %union.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %intersect.qname; EMPTY>
+<!ATTLIST %intersect.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %cartesianproduct.qname; EMPTY>
+<!ATTLIST %cartesianproduct.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %in.qname; EMPTY>
+<!ATTLIST %in.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %notin.qname; EMPTY>
+<!ATTLIST %notin.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %notsubset.qname; EMPTY>
+<!ATTLIST %notsubset.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %notprsubset.qname; EMPTY>
+<!ATTLIST %notprsubset.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %setdiff.qname; EMPTY>
+<!ATTLIST %setdiff.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %subset.qname; EMPTY>
+<!ATTLIST %subset.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %prsubset.qname; EMPTY>
+<!ATTLIST %prsubset.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %card.qname; EMPTY>
+<!ATTLIST %card.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %sum.qname; EMPTY>
+<!ATTLIST %sum.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %product.qname; EMPTY>
+<!ATTLIST %product.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %limit.qname; EMPTY>
+<!ATTLIST %limit.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %sin.qname; EMPTY>
+<!ATTLIST %sin.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %cos.qname; EMPTY>
+<!ATTLIST %cos.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %tan.qname; EMPTY>
+<!ATTLIST %tan.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %sec.qname; EMPTY>
+<!ATTLIST %sec.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %csc.qname; EMPTY>
+<!ATTLIST %csc.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %cot.qname; EMPTY>
+<!ATTLIST %cot.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %sinh.qname; EMPTY>
+<!ATTLIST %sinh.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %cosh.qname; EMPTY>
+<!ATTLIST %cosh.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %tanh.qname; EMPTY>
+<!ATTLIST %tanh.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %sech.qname; EMPTY>
+<!ATTLIST %sech.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %csch.qname; EMPTY>
+<!ATTLIST %csch.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %coth.qname; EMPTY>
+<!ATTLIST %coth.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arcsin.qname; EMPTY>
+<!ATTLIST %arcsin.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arccos.qname; EMPTY>
+<!ATTLIST %arccos.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arctan.qname; EMPTY>
+<!ATTLIST %arctan.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arccosh.qname; EMPTY>
+<!ATTLIST %arccosh.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arccot.qname; EMPTY>
+<!ATTLIST %arccot.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arccoth.qname; EMPTY>
+<!ATTLIST %arccoth.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arccsc.qname; EMPTY>
+<!ATTLIST %arccsc.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arccsch.qname; EMPTY>
+<!ATTLIST %arccsch.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arcsec.qname; EMPTY>
+<!ATTLIST %arcsec.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arcsech.qname; EMPTY>
+<!ATTLIST %arcsech.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arcsinh.qname; EMPTY>
+<!ATTLIST %arcsinh.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %arctanh.qname; EMPTY>
+<!ATTLIST %arctanh.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %mean.qname; EMPTY>
+<!ATTLIST %mean.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %sdev.qname; EMPTY>
+<!ATTLIST %sdev.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %variance.qname; EMPTY>
+<!ATTLIST %variance.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %median.qname; EMPTY>
+<!ATTLIST %median.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %mode.qname; EMPTY>
+<!ATTLIST %mode.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %vector.qname; ((%BvarQ;),(%DomainQ;),(%ContExp;)*)>
+<!ATTLIST %vector.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %matrix.qname; ((%BvarQ;),(%DomainQ;),(%ContExp;)*)>
+<!ATTLIST %matrix.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %matrixrow.qname; ((%BvarQ;),(%DomainQ;),(%ContExp;)*)>
+<!ATTLIST %matrixrow.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %determinant.qname; EMPTY>
+<!ATTLIST %determinant.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %transpose.qname; EMPTY>
+<!ATTLIST %transpose.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %selector.qname; EMPTY>
+<!ATTLIST %selector.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %vectorproduct.qname; EMPTY>
+<!ATTLIST %vectorproduct.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %scalarproduct.qname; EMPTY>
+<!ATTLIST %scalarproduct.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %outerproduct.qname; EMPTY>
+<!ATTLIST %outerproduct.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %integers.qname; EMPTY>
+<!ATTLIST %integers.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %reals.qname; EMPTY>
+<!ATTLIST %reals.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %rationals.qname; EMPTY>
+<!ATTLIST %rationals.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %naturalnumbers.qname; EMPTY>
+<!ATTLIST %naturalnumbers.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %complexes.qname; EMPTY>
+<!ATTLIST %complexes.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %primes.qname; EMPTY>
+<!ATTLIST %primes.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %emptyset.qname; EMPTY>
+<!ATTLIST %emptyset.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %exponentiale.qname; EMPTY>
+<!ATTLIST %exponentiale.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %imaginaryi.qname; EMPTY>
+<!ATTLIST %imaginaryi.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %notanumber.qname; EMPTY>
+<!ATTLIST %notanumber.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %true.qname; EMPTY>
+<!ATTLIST %true.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %false.qname; EMPTY>
+<!ATTLIST %false.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %pi.qname; EMPTY>
+<!ATTLIST %pi.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %eulergamma.qname; EMPTY>
+<!ATTLIST %eulergamma.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!ELEMENT %infinity.qname; EMPTY>
+<!ATTLIST %infinity.qname;
+  %CommonAtt;
+  %DefEncAtt;>
+
+<!-- end of mathml3-common.rng -->
+
+<!ENTITY % MathExpression "%ContExp;|%PresentationExpression;">
+
+<!-- end of mathml3-content.rng -->
+
+<!-- start of mathml3-presentation.rng -->
+
+<!ENTITY % ImpliedMrow "(%MathExpression;)*">
+
+<!ENTITY % TableRowExpression "%mtr.qname;|%mlabeledtr.qname;">
+
+<!ENTITY % TableCellExpression "%mtd.qname;">
+
+<!ENTITY % MstackExpression "%MathExpression;|%mscarries.qname;
+                             |%msline.qname;|%msrow.qname;|%msgroup.qname;">
+
+<!ENTITY % MsrowExpression "%MathExpression;|%none.qname;">
+
+<!ENTITY % MultiScriptExpression "(%MathExpression;|%none.qname;),
+                                  (%MathExpression;|%none.qname;)">
+
+<!ENTITY % mpadded-length "CDATA">
+
+<!ENTITY % linestyle "none|solid|dashed">
+
+<!ENTITY % verticalalign "top|bottom|center|baseline|axis">
+
+<!ENTITY % columnalignstyle "left|center|right">
+
+<!ENTITY % notationstyle "longdiv|actuarial|radical|box|roundedbox
+                          |circle|left|right|top|bottom|updiagonalstrike
+                          |downdiagonalstrike|verticalstrike
+                          |horizontalstrike|madruwb">
+
+<!ENTITY % idref "#PCDATA">
+
+<!ENTITY % unsigned-integer "CDATA">
+
+<!ENTITY % integer "CDATA">
+
+<!ENTITY % number "CDATA">
+
+<!ENTITY % character "CDATA">
+
+<!ENTITY % color "CDATA">
+
+<!ENTITY % group-alignment "left|center|right|decimalpoint">
+
+<!ENTITY % group-alignment-list "#PCDATA">
+
+<!ENTITY % group-alignment-list-list "#PCDATA">
+
+<!ENTITY % positive-integer "CDATA">
+
+<!ENTITY % token.content "#PCDATA|%mglyph.qname;|%malignmark.qname;">
+
+<!ELEMENT %mi.qname; (%token.content;)*>
+
+<!ENTITY % length "CDATA">
+
+<!ENTITY % DeprecatedTokenAtt "
+  fontfamily CDATA #IMPLIED
+  fontweight (normal|bold) #IMPLIED
+  fontstyle (normal|italic) #IMPLIED
+  fontsize %length; #IMPLIED
+  color %color; #IMPLIED
+  background CDATA #IMPLIED">
+
+<!ENTITY % TokenAtt "
+  mathvariant (normal|bold|italic|bold-italic|double-struck|bold-fraktur
+               |script|bold-script|fraktur|sans-serif|bold-sans-serif
+               |sans-serif-italic|sans-serif-bold-italic|monospace
+               |initial|tailed|looped|stretched) #IMPLIED
+  mathsize CDATA #IMPLIED
+  dir (ltr|rtl) #IMPLIED
+  %DeprecatedTokenAtt;">
+
+<!ENTITY % CommonPresAtt "
+  mathcolor %color; #IMPLIED
+  mathbackground CDATA #IMPLIED">
+
+<!ATTLIST %mi.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %TokenAtt;>
+
+<!ELEMENT %mn.qname; (%token.content;)*>
+
+<!ATTLIST %mn.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %TokenAtt;>
+
+<!ELEMENT %mo.qname; (%token.content;)*>
+
+<!ATTLIST %mo.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %TokenAtt;
+  form (prefix|infix|postfix) #IMPLIED
+  fence (true|false) #IMPLIED
+  separator (true|false) #IMPLIED
+  lspace %length; #IMPLIED
+  rspace %length; #IMPLIED
+  stretchy (true|false) #IMPLIED
+  symmetric (true|false) #IMPLIED
+  maxsize CDATA #IMPLIED
+  minsize %length; #IMPLIED
+  largeop (true|false) #IMPLIED
+  movablelimits (true|false) #IMPLIED
+  accent (true|false) #IMPLIED
+  linebreak (auto|newline|nobreak|goodbreak|badbreak) #IMPLIED
+  lineleading %length; #IMPLIED
+  linebreakstyle (before|after|duplicate|infixlinebreakstyle) #IMPLIED
+  linebreakmultchar CDATA #IMPLIED
+  indentalign (left|center|right|auto|id) #IMPLIED
+  indentshift %length; #IMPLIED
+  indenttarget CDATA #IMPLIED
+  indentalignfirst (left|center|right|auto|id|indentalign) #IMPLIED
+  indentshiftfirst CDATA #IMPLIED
+  indentalignlast (left|center|right|auto|id|indentalign) #IMPLIED
+  indentshiftlast CDATA #IMPLIED>
+
+<!ELEMENT %mtext.qname; (%token.content;)*>
+
+<!ATTLIST %mtext.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %TokenAtt;>
+
+<!ELEMENT %mspace.qname; EMPTY>
+
+<!ATTLIST %mspace.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %TokenAtt;
+  width %length; #IMPLIED
+  height %length; #IMPLIED
+  depth %length; #IMPLIED
+  linebreak (auto|newline|nobreak|goodbreak|badbreak
+             |indentingnewline) #IMPLIED>
+
+<!ELEMENT %ms.qname; (%token.content;)*>
+
+<!ATTLIST %ms.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %TokenAtt;
+  lquote CDATA #IMPLIED
+  rquote CDATA #IMPLIED>
+
+<!ENTITY % mglyph.deprecatedattributes "
+  index %integer; #IMPLIED
+  mathvariant (normal|bold|italic|bold-italic|double-struck|bold-fraktur
+               |script|bold-script|fraktur|sans-serif|bold-sans-serif
+               |sans-serif-italic|sans-serif-bold-italic|monospace
+               |initial|tailed|looped|stretched) #IMPLIED
+  mathsize CDATA #IMPLIED
+  %DeprecatedTokenAtt;">
+
+<!ENTITY % mglyph.attributes "
+  %CommonAtt;
+  %CommonPresAtt;
+  src CDATA #IMPLIED
+  width %length; #IMPLIED
+  height %length; #IMPLIED
+  valign %length; #IMPLIED
+  alt CDATA #IMPLIED">
+
+<!ELEMENT %mglyph.qname; EMPTY>
+<!ATTLIST %mglyph.qname;
+  %mglyph.attributes;
+  %mglyph.deprecatedattributes;>
+
+<!ELEMENT %msline.qname; EMPTY>
+
+<!ATTLIST %msline.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  position %integer; #IMPLIED
+  length %unsigned-integer; #IMPLIED
+  leftoverhang %length; #IMPLIED
+  rightoverhang %length; #IMPLIED
+  mslinethickness CDATA #IMPLIED>
+
+<!ELEMENT %none.qname; EMPTY>
+
+<!ATTLIST %none.qname;
+  %CommonAtt;
+  %CommonPresAtt;>
+
+<!ELEMENT %mprescripts.qname; EMPTY>
+
+<!ATTLIST %mprescripts.qname;
+  %CommonAtt;
+  %CommonPresAtt;>
+
+<!ELEMENT %malignmark.qname; EMPTY>
+
+<!ATTLIST %malignmark.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  edge (left|right) #IMPLIED>
+
+<!ELEMENT %maligngroup.qname; EMPTY>
+
+<!ATTLIST %maligngroup.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  groupalign (left|center|right|decimalpoint) #IMPLIED>
+
+<!ELEMENT %mrow.qname; (%MathExpression;)*>
+
+<!ATTLIST %mrow.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  dir (ltr|rtl) #IMPLIED>
+
+<!ELEMENT %mfrac.qname; ((%MathExpression;),(%MathExpression;))>
+
+<!ATTLIST %mfrac.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  linethickness CDATA #IMPLIED
+  numalign (left|center|right) #IMPLIED
+  denomalign (left|center|right) #IMPLIED
+  bevelled (true|false) #IMPLIED>
+
+<!ELEMENT %msqrt.qname; (%ImpliedMrow;)>
+
+<!ATTLIST %msqrt.qname;
+  %CommonAtt;
+  %CommonPresAtt;>
+
+<!ELEMENT %mroot.qname; ((%MathExpression;),(%MathExpression;))>
+
+<!ATTLIST %mroot.qname;
+  %CommonAtt;
+  %CommonPresAtt;>
+
+<!ELEMENT %mstyle.qname; (%ImpliedMrow;)>
+
+<!ENTITY % mstyle.deprecatedattributes "
+  %DeprecatedTokenAtt;
+  veryverythinmathspace %length; #IMPLIED
+  verythinmathspace %length; #IMPLIED
+  thinmathspace %length; #IMPLIED
+  mediummathspace %length; #IMPLIED
+  thickmathspace %length; #IMPLIED
+  verythickmathspace %length; #IMPLIED
+  veryverythickmathspace %length; #IMPLIED">
+
+<!ENTITY % mstyle.generalattributes "
+  accent (true|false) #IMPLIED
+  accentunder (true|false) #IMPLIED
+  align (left|right|center) #IMPLIED
+  alignmentscope CDATA #IMPLIED
+  bevelled (true|false) #IMPLIED
+  charalign (left|center|right) #IMPLIED
+  charspacing CDATA #IMPLIED
+  close CDATA #IMPLIED
+  columnalign CDATA #IMPLIED
+  columnlines CDATA #IMPLIED
+  columnspacing CDATA #IMPLIED
+  columnspan %positive-integer; #IMPLIED
+  columnwidth CDATA #IMPLIED
+  crossout CDATA #IMPLIED
+  denomalign (left|center|right) #IMPLIED
+  depth %length; #IMPLIED
+  dir (ltr|rtl) #IMPLIED
+  edge (left|right) #IMPLIED
+  equalcolumns (true|false) #IMPLIED
+  equalrows (true|false) #IMPLIED
+  fence (true|false) #IMPLIED
+  form (prefix|infix|postfix) #IMPLIED
+  frame (%linestyle;) #IMPLIED
+  framespacing CDATA #IMPLIED
+  groupalign CDATA #IMPLIED
+  height %length; #IMPLIED
+  indentalign (left|center|right|auto|id) #IMPLIED
+  indentalignfirst (left|center|right|auto|id|indentalign) #IMPLIED
+  indentalignlast (left|center|right|auto|id|indentalign) #IMPLIED
+  indentshift %length; #IMPLIED
+  indentshiftfirst CDATA #IMPLIED
+  indentshiftlast CDATA #IMPLIED
+  indenttarget CDATA #IMPLIED
+  largeop (true|false) #IMPLIED
+  leftoverhang %length; #IMPLIED
+  length %unsigned-integer; #IMPLIED
+  linebreak (auto|newline|nobreak|goodbreak|badbreak) #IMPLIED
+  linebreakmultchar CDATA #IMPLIED
+  linebreakstyle (before|after|duplicate|infixlinebreakstyle) #IMPLIED
+  lineleading %length; #IMPLIED
+  linethickness CDATA #IMPLIED
+  location (w|nw|n|ne|e|se|s|sw) #IMPLIED
+  longdivstyle CDATA #IMPLIED
+  lquote CDATA #IMPLIED
+  lspace %length; #IMPLIED
+  mathsize CDATA #IMPLIED
+  mathvariant (normal|bold|italic|bold-italic|double-struck|bold-fraktur
+               |script|bold-script|fraktur|sans-serif|bold-sans-serif
+               |sans-serif-italic|sans-serif-bold-italic|monospace
+               |initial|tailed|looped|stretched) #IMPLIED
+  maxsize CDATA #IMPLIED
+  minlabelspacing %length; #IMPLIED
+  minsize %length; #IMPLIED
+  movablelimits (true|false) #IMPLIED
+  mslinethickness CDATA #IMPLIED
+  notation CDATA #IMPLIED
+  numalign (left|center|right) #IMPLIED
+  open CDATA #IMPLIED
+  position %integer; #IMPLIED
+  rightoverhang %length; #IMPLIED
+  rowalign CDATA #IMPLIED
+  rowlines CDATA #IMPLIED
+  rowspacing CDATA #IMPLIED
+  rowspan %positive-integer; #IMPLIED
+  rquote CDATA #IMPLIED
+  rspace %length; #IMPLIED
+  selection %positive-integer; #IMPLIED
+  separator (true|false) #IMPLIED
+  separators CDATA #IMPLIED
+  shift %integer; #IMPLIED
+  side (left|right|leftoverlap|rightoverlap) #IMPLIED
+  stackalign (left|center|right|decimalpoint) #IMPLIED
+  stretchy (true|false) #IMPLIED
+  subscriptshift %length; #IMPLIED
+  superscriptshift %length; #IMPLIED
+  symmetric (true|false) #IMPLIED
+  valign %length; #IMPLIED
+  width %length; #IMPLIED">
+
+<!ENTITY % mstyle.specificattributes "
+  scriptlevel %integer; #IMPLIED
+  displaystyle (true|false) #IMPLIED
+  scriptsizemultiplier %number; #IMPLIED
+  scriptminsize %length; #IMPLIED
+  infixlinebreakstyle (before|after|duplicate) #IMPLIED
+  decimalpoint %character; #IMPLIED">
+
+<!ATTLIST %mstyle.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  %mstyle.specificattributes;
+  %mstyle.generalattributes;
+  %mstyle.deprecatedattributes;>
+
+<!ELEMENT %merror.qname; (%ImpliedMrow;)>
+
+<!ATTLIST %merror.qname;
+  %CommonAtt;
+  %CommonPresAtt;>
+
+<!ELEMENT %mpadded.qname; (%ImpliedMrow;)>
+
+<!ATTLIST %mpadded.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  height %mpadded-length; #IMPLIED
+  depth %mpadded-length; #IMPLIED
+  width %mpadded-length; #IMPLIED
+  lspace %mpadded-length; #IMPLIED
+  voffset %mpadded-length; #IMPLIED>
+
+<!ELEMENT %mphantom.qname; (%ImpliedMrow;)>
+
+<!ATTLIST %mphantom.qname;
+  %CommonAtt;
+  %CommonPresAtt;>
+
+<!ELEMENT %mfenced.qname; (%MathExpression;)*>
+
+<!ATTLIST %mfenced.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  open CDATA #IMPLIED
+  close CDATA #IMPLIED
+  separators CDATA #IMPLIED>
+
+<!ELEMENT %menclose.qname; (%ImpliedMrow;)>
+
+<!ATTLIST %menclose.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  notation CDATA #IMPLIED>
+
+<!ELEMENT %msub.qname; ((%MathExpression;),(%MathExpression;))>
+
+<!ATTLIST %msub.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  subscriptshift %length; #IMPLIED>
+
+<!ELEMENT %msup.qname; ((%MathExpression;),(%MathExpression;))>
+
+<!ATTLIST %msup.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  superscriptshift %length; #IMPLIED>
+
+<!ENTITY % msubsup.attributes "
+  %CommonAtt;
+  %CommonPresAtt;
+  subscriptshift %length; #IMPLIED
+  superscriptshift %length; #IMPLIED">
+
+<!ELEMENT %msubsup.qname; ((%MathExpression;),(%MathExpression;),
+                         (%MathExpression;))>
+<!ATTLIST %msubsup.qname;
+  %msubsup.attributes;>
+
+<!ELEMENT %munder.qname; ((%MathExpression;),(%MathExpression;))>
+
+<!ATTLIST %munder.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  accentunder (true|false) #IMPLIED
+  align (left|right|center) #IMPLIED>
+
+<!ELEMENT %mover.qname; ((%MathExpression;),(%MathExpression;))>
+
+<!ATTLIST %mover.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  accent (true|false) #IMPLIED
+  align (left|right|center) #IMPLIED>
+
+<!ELEMENT %munderover.qname; ((%MathExpression;),(%MathExpression;),
+                            (%MathExpression;))>
+
+<!ATTLIST %munderover.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  accent (true|false) #IMPLIED
+  accentunder (true|false) #IMPLIED
+  align (left|right|center) #IMPLIED>
+
+<!ELEMENT %mmultiscripts.qname; ((%MathExpression;),
+                               (%MultiScriptExpression;)*,
+                               (%mprescripts.qname;,
+                                (%MultiScriptExpression;)*)?)>
+
+<!ATTLIST %mmultiscripts.qname;
+  %msubsup.attributes;>
+
+<!ELEMENT %mtable.qname; (%TableRowExpression;)*>
+
+<!ATTLIST %mtable.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  align CDATA #IMPLIED
+  rowalign CDATA #IMPLIED
+  columnalign CDATA #IMPLIED
+  groupalign CDATA #IMPLIED
+  alignmentscope CDATA #IMPLIED
+  columnwidth CDATA #IMPLIED
+  width CDATA #IMPLIED
+  rowspacing CDATA #IMPLIED
+  columnspacing CDATA #IMPLIED
+  rowlines CDATA #IMPLIED
+  columnlines CDATA #IMPLIED
+  frame (%linestyle;) #IMPLIED
+  framespacing CDATA #IMPLIED
+  equalrows (true|false) #IMPLIED
+  equalcolumns (true|false) #IMPLIED
+  displaystyle (true|false) #IMPLIED
+  side (left|right|leftoverlap|rightoverlap) #IMPLIED
+  minlabelspacing %length; #IMPLIED>
+
+<!ELEMENT %mlabeledtr.qname; (%TableCellExpression;)+>
+
+<!ENTITY % mtr.attributes "
+  %CommonAtt;
+  %CommonPresAtt;
+  rowalign (top|bottom|center|baseline|axis) #IMPLIED
+  columnalign CDATA #IMPLIED
+  groupalign CDATA #IMPLIED">
+
+<!ATTLIST %mlabeledtr.qname;
+  %mtr.attributes;>
+
+<!ELEMENT %mtr.qname; (%TableCellExpression;)*>
+<!ATTLIST %mtr.qname;
+  %mtr.attributes;>
+
+<!ELEMENT %mtd.qname; (%ImpliedMrow;)>
+
+<!ATTLIST %mtd.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  rowspan %positive-integer; #IMPLIED
+  columnspan %positive-integer; #IMPLIED
+  rowalign (top|bottom|center|baseline|axis) #IMPLIED
+  columnalign (%columnalignstyle;) #IMPLIED
+  groupalign CDATA #IMPLIED>
+
+<!ELEMENT %mstack.qname; (%MstackExpression;)*>
+
+<!ATTLIST %mstack.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  align CDATA #IMPLIED
+  stackalign (left|center|right|decimalpoint) #IMPLIED
+  charalign (left|center|right) #IMPLIED
+  charspacing CDATA #IMPLIED>
+
+<!ELEMENT %mlongdiv.qname; ((%MstackExpression;),(%MstackExpression;),
+                          (%MstackExpression;)+)>
+
+<!ENTITY % msgroup.attributes "
+  %CommonAtt;
+  %CommonPresAtt;
+  position %integer; #IMPLIED
+  shift %integer; #IMPLIED">
+
+<!ATTLIST %mlongdiv.qname;
+  %msgroup.attributes;
+  longdivstyle CDATA #IMPLIED>
+
+<!ELEMENT %msgroup.qname; (%MstackExpression;)*>
+<!ATTLIST %msgroup.qname;
+  %msgroup.attributes;>
+
+<!ELEMENT %msrow.qname; (%MsrowExpression;)*>
+
+<!ATTLIST %msrow.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  position %integer; #IMPLIED>
+
+<!ELEMENT %mscarries.qname; (%MsrowExpression;|%mscarry.qname;)*>
+
+<!ATTLIST %mscarries.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  position %integer; #IMPLIED
+  location (w|nw|n|ne|e|se|s|sw) #IMPLIED
+  crossout CDATA #IMPLIED
+  scriptsizemultiplier %number; #IMPLIED>
+
+<!ELEMENT %mscarry.qname; (%MsrowExpression;)*>
+
+<!ATTLIST %mscarry.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  location (w|nw|n|ne|e|se|s|sw) #IMPLIED
+  crossout CDATA #IMPLIED>
+
+<!ELEMENT %maction.qname; (%MathExpression;)+>
+
+<!ATTLIST %maction.qname;
+  %CommonAtt;
+  %CommonPresAtt;
+  actiontype CDATA #IMPLIED
+  selection %positive-integer; #IMPLIED>
+
+<!-- end of mathml3-presentation.rng -->
+
+<!-- start of mathml3-common.rng -->
+
+<!ELEMENT %math.qname; (%MathExpression;)*>
+
+<!ENTITY % NonMathMLAtt "">
+
+<!ENTITY % math.deprecatedattributes "
+  mode CDATA #IMPLIED
+  macros CDATA #IMPLIED">
+
+<!ATTLIST %math.qname;
+  %CommonAtt;
+  display (block|inline) #IMPLIED
+  maxwidth %length; #IMPLIED
+  overflow (linebreak|scroll|elide|truncate|scale) #IMPLIED
+  altimg CDATA #IMPLIED
+  altimg-width %length; #IMPLIED
+  altimg-height %length; #IMPLIED
+  altimg-valign CDATA #IMPLIED
+  alttext CDATA #IMPLIED
+  cdgroup CDATA #IMPLIED
+  %math.deprecatedattributes;
+  %CommonPresAtt;
+  %mstyle.specificattributes;
+  %mstyle.generalattributes;>
+
+<!--<!ENTITY % name "
+  name CDATA #REQUIRED">
+-->
+<!ENTITY % cd "
+  cd CDATA #REQUIRED">
+
+<!ENTITY % annotation.attributes "
+  %CommonAtt;
+  cd CDATA #IMPLIED
+  name CDATA #IMPLIED
+  %DefEncAtt;
+  src CDATA #IMPLIED">
+
+<!ELEMENT %annotation.qname; (#PCDATA)>
+<!ATTLIST %annotation.qname;
+  %annotation.attributes;>
+
+<!ENTITY % annotation-xml.model "(%MathExpression;)*">
+
+<!ENTITY % anyElement "">
+
+<!ELEMENT %annotation-xml.qname; (%annotation-xml.model;)>
+<!ATTLIST %annotation-xml.qname;
+  %annotation.attributes;>
+
+<!ELEMENT %semantics.qname; ((%MathExpression;),
+                           (%annotation.qname;|%annotation-xml.qname;)*)>
+
+<!ATTLIST %semantics.qname;
+  %CommonAtt;
+  %DefEncAtt;
+  cd CDATA #IMPLIED
+  name CDATA #IMPLIED>
+
diff --git a/dtd/mathmlsetup.ent b/dtd/mathmlsetup.ent
new file mode 100644
index 0000000..034be16
--- /dev/null
+++ b/dtd/mathmlsetup.ent
@@ -0,0 +1,191 @@
+<!-- ============================================================= -->
+<!--  MODULE:    MathML DTD SETUP MODULE                           -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite MathML Setup Module v2.0 20040830//EN"
+     Delivered as file "mathmlsetup.ent"                           -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Provides the organization for using the           -->
+<!--             MathML DTD                                        -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Overrides to standard parameter entities used  -->
+<!--                in the MathML 2.0 DTD                          -->
+<!--             2) Call to MathML 2.0 DTD                         -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             1) mathml2.dtd           MathML 2.0 DTD           -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+          
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+  
+  2. Updated public identifier to "v2.0 20040830"          
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  1. Added attribute "alternate-form-of" to <mml:math> 
+     (Note: parameter entity %math.qname; resolves to <mml:math>.)
+     Rationale: Where multiple formats of an item (e.g., graphic 
+     file, media object, chemical structure) are available, this 
+     attribute indicates that a format is a secondary one and 
+     provides a link to the primary format, so that only one 
+     format of an item is displayed.
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    SET UP FOR THE MathML MODULE               -->
+<!-- ============================================================= -->
+
+
+<!--                    MathML DTD                                 -->
+<!--                    The official version of the MathML 2.0 can 
+                        be found at: http://www.w3.org/TR/MathML2/
+
+                        See also Mathematical Markup Language  
+                        (MathML) Version 2.0
+                       
+                        A. Parsing MathML
+                        A.6 The MathML DTD
+            http://www.w3.org/TR/MathML2/appendixa.html#parsing-dtd
+
+                        A zip file with entity declarations is 
+                        available from
+            http://www.w3.org/TR/MathML2/DTD-MathML-20010221.zip   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY OVERRIDES FOR MathML 2.0  -->
+<!-- ============================================================= -->
+
+
+<!ENTITY % MATHML.prefixed "INCLUDE"                                 >
+
+
+<!ENTITY % MATHML.prefix   "mml"                                     >
+
+
+<![%MATHML.prefixed;[
+<!ENTITY % MATHML.pfx      "%MATHML.prefix;:"                        >
+]]>
+
+
+<!ENTITY % math.qname      "%MATHML.pfx;math"                        >
+
+
+<!--         alternate-form-of
+                        Where multiple formats of an item (e.g., 
+                        graphic file, media object, chemical 
+                        structure) are available, this attribute 
+                        indicates that a format is a secondary 
+                        one and provides a link to the primary 
+                        format, so that only one format of an 
+                        item is displayed.                         -->
+<!ATTLIST  %math.qname;
+             alternate-form-of
+                        IDREF                              #IMPLIED  >
+
+
+<!-- ============================================================= -->
+<!--                    MathML 2.0 INVOCATION                      -->
+<!-- ============================================================= -->
+
+%mathml.dtd;
+
+
+<!-- ================== End MATHML Setup Module ================== -->
diff --git a/dtd/mmlalias.ent b/dtd/mmlalias.ent
new file mode 100644
index 0000000..1371af3
--- /dev/null
+++ b/dtd/mmlalias.ent
@@ -0,0 +1,564 @@
+
+<!--
+     File mmlalias.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+     References to the VARIANT SELECTOR 1 character (&#x0FE00;)
+     should match the uses listed in Unicode Technical Report 25.
+
+-->
+
+<!ENTITY angle            "&#x02220;" ><!--alias ISOAMSO ang -->
+<!ENTITY ApplyFunction    "&#x02061;" ><!--character showing function application in presentation tagging -->
+<!ENTITY approx           "&#x02248;" ><!--alias ISOTECH ap -->
+<!ENTITY approxeq         "&#x0224A;" ><!--alias ISOAMSR ape -->
+<!ENTITY Assign           "&#x02254;" ><!--assignment operator, alias ISOAMSR colone -->
+<!ENTITY backcong         "&#x0224C;" ><!--alias ISOAMSR bcong -->
+<!ENTITY backepsilon      "&#x003F6;" ><!--alias ISOAMSR bepsi -->
+<!ENTITY backprime        "&#x02035;" ><!--alias ISOAMSO bprime -->
+<!ENTITY backsim          "&#x0223D;" ><!--alias ISOAMSR bsim -->
+<!ENTITY backsimeq        "&#x022CD;" ><!--alias ISOAMSR bsime -->
+<!ENTITY Backslash        "&#x02216;" ><!--alias ISOAMSB setmn -->
+<!ENTITY barwedge         "&#x02305;" ><!--alias ISOAMSB barwed -->
+<!ENTITY Because          "&#x02235;" ><!--alias ISOTECH becaus -->
+<!ENTITY because          "&#x02235;" ><!--alias ISOTECH becaus -->
+<!ENTITY Bernoullis       "&#x0212C;" ><!--alias ISOTECH bernou -->
+<!ENTITY between          "&#x0226C;" ><!--alias ISOAMSR twixt -->
+<!ENTITY bigcap           "&#x022C2;" ><!--alias ISOAMSB xcap -->
+<!ENTITY bigcirc          "&#x025EF;" ><!--alias ISOAMSB xcirc -->
+<!ENTITY bigcup           "&#x022C3;" ><!--alias ISOAMSB xcup -->
+<!ENTITY bigodot          "&#x02A00;" ><!--alias ISOAMSB xodot -->
+<!ENTITY bigoplus         "&#x02A01;" ><!--alias ISOAMSB xoplus -->
+<!ENTITY bigotimes        "&#x02A02;" ><!--alias ISOAMSB xotime -->
+<!ENTITY bigsqcup         "&#x02A06;" ><!--alias ISOAMSB xsqcup -->
+<!ENTITY bigstar          "&#x02605;" ><!--ISOPUB    starf  -->
+<!ENTITY bigtriangledown  "&#x025BD;" ><!--alias ISOAMSB xdtri -->
+<!ENTITY bigtriangleup    "&#x025B3;" ><!--alias ISOAMSB xutri -->
+<!ENTITY biguplus         "&#x02A04;" ><!--alias ISOAMSB xuplus -->
+<!ENTITY bigvee           "&#x022C1;" ><!--alias ISOAMSB xvee -->
+<!ENTITY bigwedge         "&#x022C0;" ><!--alias ISOAMSB xwedge -->
+<!ENTITY bkarow           "&#x0290D;" ><!--alias ISOAMSA rbarr -->
+<!ENTITY blacklozenge     "&#x029EB;" ><!--alias ISOPUB lozf -->
+<!ENTITY blacksquare      "&#x025AA;" ><!--ISOTECH  squarf  -->
+<!ENTITY blacktriangle    "&#x025B4;" ><!--alias ISOPUB utrif -->
+<!ENTITY blacktriangledown "&#x025BE;" ><!--alias ISOPUB dtrif -->
+<!ENTITY blacktriangleleft "&#x025C2;" ><!--alias ISOPUB ltrif -->
+<!ENTITY blacktriangleright "&#x025B8;" ><!--alias ISOPUB rtrif -->
+<!ENTITY bot              "&#x022A5;" ><!--alias ISOTECH bottom -->
+<!ENTITY boxminus         "&#x0229F;" ><!--alias ISOAMSB minusb -->
+<!ENTITY boxplus          "&#x0229E;" ><!--alias ISOAMSB plusb -->
+<!ENTITY boxtimes         "&#x022A0;" ><!--alias ISOAMSB timesb -->
+<!ENTITY Breve            "&#x002D8;" ><!--alias ISODIA breve -->
+<!ENTITY bullet           "&#x02022;" ><!--alias ISOPUB bull -->
+<!ENTITY Bumpeq           "&#x0224E;" ><!--alias ISOAMSR bump -->
+<!ENTITY bumpeq           "&#x0224F;" ><!--alias ISOAMSR bumpe -->
+<!ENTITY CapitalDifferentialD "&#x02145;" ><!--D for use in differentials, e.g., within integrals -->
+<!ENTITY Cayleys          "&#x0212D;" ><!--the non-associative ring of octonions or Cayley numbers -->
+<!ENTITY Cedilla          "&#x000B8;" ><!--alias ISODIA cedil -->
+<!ENTITY CenterDot        "&#x000B7;" ><!--alias ISONUM middot -->
+<!ENTITY centerdot        "&#x000B7;" ><!--alias ISONUM middot -->
+<!ENTITY checkmark        "&#x02713;" ><!--alias ISOPUB check -->
+<!ENTITY circeq           "&#x02257;" ><!--alias ISOAMSR cire -->
+<!ENTITY circlearrowleft  "&#x021BA;" ><!--alias ISOAMSA olarr -->
+<!ENTITY circlearrowright "&#x021BB;" ><!--alias ISOAMSA orarr -->
+<!ENTITY circledast       "&#x0229B;" ><!--alias ISOAMSB oast -->
+<!ENTITY circledcirc      "&#x0229A;" ><!--alias ISOAMSB ocir -->
+<!ENTITY circleddash      "&#x0229D;" ><!--alias ISOAMSB odash -->
+<!ENTITY CircleDot        "&#x02299;" ><!--alias ISOAMSB odot -->
+<!ENTITY circledR         "&#x000AE;" ><!--alias ISONUM reg -->
+<!ENTITY circledS         "&#x024C8;" ><!--alias ISOAMSO oS -->
+<!ENTITY CircleMinus      "&#x02296;" ><!--alias ISOAMSB ominus -->
+<!ENTITY CirclePlus       "&#x02295;" ><!--alias ISOAMSB oplus -->
+<!ENTITY CircleTimes      "&#x02297;" ><!--alias ISOAMSB otimes -->
+<!ENTITY ClockwiseContourIntegral "&#x02232;" ><!--alias ISOTECH cwconint -->
+<!ENTITY CloseCurlyDoubleQuote "&#x0201D;" ><!--alias ISONUM rdquo -->
+<!ENTITY CloseCurlyQuote  "&#x02019;" ><!--alias ISONUM rsquo -->
+<!ENTITY clubsuit         "&#x02663;" ><!--ISOPUB    clubs  -->
+<!ENTITY coloneq          "&#x02254;" ><!--alias ISOAMSR colone -->
+<!ENTITY complement       "&#x02201;" ><!--alias ISOAMSO comp -->
+<!ENTITY complexes        "&#x02102;" ><!--the field of complex numbers -->
+<!ENTITY Congruent        "&#x02261;" ><!--alias ISOTECH equiv -->
+<!ENTITY ContourIntegral  "&#x0222E;" ><!--alias ISOTECH conint -->
+<!ENTITY Coproduct        "&#x02210;" ><!--alias ISOAMSB coprod -->
+<!ENTITY CounterClockwiseContourIntegral "&#x02233;" ><!--alias ISOTECH awconint -->
+<!ENTITY CupCap           "&#x0224D;" ><!--alias asympeq -->
+<!ENTITY curlyeqprec      "&#x022DE;" ><!--alias ISOAMSR cuepr -->
+<!ENTITY curlyeqsucc      "&#x022DF;" ><!--alias ISOAMSR cuesc -->
+<!ENTITY curlyvee         "&#x022CE;" ><!--alias ISOAMSB cuvee -->
+<!ENTITY curlywedge       "&#x022CF;" ><!--alias ISOAMSB cuwed -->
+<!ENTITY curvearrowleft   "&#x021B6;" ><!--alias ISOAMSA cularr -->
+<!ENTITY curvearrowright  "&#x021B7;" ><!--alias ISOAMSA curarr -->
+<!ENTITY dbkarow          "&#x0290F;" ><!--alias ISOAMSA rBarr -->
+<!ENTITY ddagger          "&#x02021;" ><!--alias ISOPUB Dagger -->
+<!ENTITY ddotseq          "&#x02A77;" ><!--alias ISOAMSR eDDot -->
+<!ENTITY Del              "&#x02207;" ><!--alias ISOTECH nabla -->
+<!ENTITY DiacriticalAcute "&#x000B4;" ><!--alias ISODIA acute -->
+<!ENTITY DiacriticalDot   "&#x002D9;" ><!--alias ISODIA dot -->
+<!ENTITY DiacriticalDoubleAcute "&#x002DD;" ><!--alias ISODIA dblac -->
+<!ENTITY DiacriticalGrave "&#x00060;" ><!--alias ISODIA grave -->
+<!ENTITY DiacriticalTilde "&#x002DC;" ><!--alias ISODIA tilde -->
+<!ENTITY Diamond          "&#x022C4;" ><!--alias ISOAMSB diam -->
+<!ENTITY diamond          "&#x022C4;" ><!--alias ISOAMSB diam -->
+<!ENTITY diamondsuit      "&#x02666;" ><!--ISOPUB    diams  -->
+<!ENTITY DifferentialD    "&#x02146;" ><!--d for use in differentials, e.g., within integrals -->
+<!ENTITY digamma          "&#x003DD;" ><!--alias ISOGRK3 gammad -->
+<!ENTITY div              "&#x000F7;" ><!--alias ISONUM divide -->
+<!ENTITY divideontimes    "&#x022C7;" ><!--alias ISOAMSB divonx -->
+<!ENTITY doteq            "&#x02250;" ><!--alias ISOAMSR esdot -->
+<!ENTITY doteqdot         "&#x02251;" ><!--alias ISOAMSR eDot -->
+<!ENTITY DotEqual         "&#x02250;" ><!--alias ISOAMSR esdot -->
+<!ENTITY dotminus         "&#x02238;" ><!--alias ISOAMSB minusd -->
+<!ENTITY dotplus          "&#x02214;" ><!--alias ISOAMSB plusdo -->
+<!ENTITY dotsquare        "&#x022A1;" ><!--alias ISOAMSB sdotb -->
+<!ENTITY doublebarwedge   "&#x02306;" ><!--alias ISOAMSB Barwed -->
+<!ENTITY DoubleContourIntegral "&#x0222F;" ><!--alias ISOTECH Conint -->
+<!ENTITY DoubleDot        "&#x000A8;" ><!--alias ISODIA die -->
+<!ENTITY DoubleDownArrow  "&#x021D3;" ><!--alias ISOAMSA dArr -->
+<!ENTITY DoubleLeftArrow  "&#x021D0;" ><!--alias ISOTECH lArr -->
+<!ENTITY DoubleLeftRightArrow "&#x021D4;" ><!--alias ISOAMSA hArr -->
+<!ENTITY DoubleLeftTee    "&#x02AE4;" ><!--alias for  &Dashv;  -->
+<!ENTITY DoubleLongLeftArrow "&#x027F8;" ><!--alias ISOAMSA xlArr -->
+<!ENTITY DoubleLongLeftRightArrow "&#x027FA;" ><!--alias ISOAMSA xhArr -->
+<!ENTITY DoubleLongRightArrow "&#x027F9;" ><!--alias ISOAMSA xrArr -->
+<!ENTITY DoubleRightArrow "&#x021D2;" ><!--alias ISOTECH rArr -->
+<!ENTITY DoubleRightTee   "&#x022A8;" ><!--alias ISOAMSR vDash -->
+<!ENTITY DoubleUpArrow    "&#x021D1;" ><!--alias ISOAMSA uArr -->
+<!ENTITY DoubleUpDownArrow "&#x021D5;" ><!--alias ISOAMSA vArr -->
+<!ENTITY DoubleVerticalBar "&#x02225;" ><!--alias ISOTECH par -->
+<!ENTITY DownArrow        "&#x02193;" ><!--alias ISONUM darr -->
+<!ENTITY Downarrow        "&#x021D3;" ><!--alias ISOAMSA dArr -->
+<!ENTITY downarrow        "&#x02193;" ><!--alias ISONUM darr -->
+<!ENTITY DownArrowUpArrow "&#x021F5;" ><!--alias ISOAMSA duarr -->
+<!ENTITY downdownarrows   "&#x021CA;" ><!--alias ISOAMSA ddarr -->
+<!ENTITY downharpoonleft  "&#x021C3;" ><!--alias ISOAMSA dharl -->
+<!ENTITY downharpoonright "&#x021C2;" ><!--alias ISOAMSA dharr -->
+<!ENTITY DownLeftVector   "&#x021BD;" ><!--alias ISOAMSA lhard -->
+<!ENTITY DownRightVector  "&#x021C1;" ><!--alias ISOAMSA rhard -->
+<!ENTITY DownTee          "&#x022A4;" ><!--alias ISOTECH top -->
+<!ENTITY DownTeeArrow     "&#x021A7;" ><!--alias for mapstodown -->
+<!ENTITY drbkarow         "&#x02910;" ><!--alias ISOAMSA RBarr -->
+<!ENTITY Element          "&#x02208;" ><!--alias ISOTECH isinv -->
+<!ENTITY emptyset         "&#x02205;" ><!--alias ISOAMSO empty -->
+<!ENTITY eqcirc           "&#x02256;" ><!--alias ISOAMSR ecir -->
+<!ENTITY eqcolon          "&#x02255;" ><!--alias ISOAMSR ecolon -->
+<!ENTITY eqsim            "&#x02242;" ><!--alias ISOAMSR esim -->
+<!ENTITY eqslantgtr       "&#x02A96;" ><!--alias ISOAMSR egs -->
+<!ENTITY eqslantless      "&#x02A95;" ><!--alias ISOAMSR els -->
+<!ENTITY EqualTilde       "&#x02242;" ><!--alias ISOAMSR esim -->
+<!ENTITY Equilibrium      "&#x021CC;" ><!--alias ISOAMSA rlhar -->
+<!ENTITY Exists           "&#x02203;" ><!--alias ISOTECH exist -->
+<!ENTITY expectation      "&#x02130;" ><!--expectation (operator) -->
+<!ENTITY ExponentialE     "&#x02147;" ><!--e use for the exponential base of the natural logarithms -->
+<!ENTITY exponentiale     "&#x02147;" ><!--base of the Napierian logarithms -->
+<!ENTITY fallingdotseq    "&#x02252;" ><!--alias ISOAMSR efDot -->
+<!ENTITY ForAll           "&#x02200;" ><!--alias ISOTECH forall -->
+<!ENTITY Fouriertrf       "&#x02131;" ><!--Fourier transform -->
+<!ENTITY geq              "&#x02265;" ><!--alias ISOTECH ge -->
+<!ENTITY geqq             "&#x02267;" ><!--alias ISOAMSR gE -->
+<!ENTITY geqslant         "&#x02A7E;" ><!--alias ISOAMSR ges -->
+<!ENTITY gg               "&#x0226B;" ><!--alias ISOAMSR Gt -->
+<!ENTITY ggg              "&#x022D9;" ><!--alias ISOAMSR Gg -->
+<!ENTITY gnapprox         "&#x02A8A;" ><!--alias ISOAMSN gnap -->
+<!ENTITY gneq             "&#x02A88;" ><!--alias ISOAMSN gne -->
+<!ENTITY gneqq            "&#x02269;" ><!--alias ISOAMSN gnE -->
+<!ENTITY GreaterEqual     "&#x02265;" ><!--alias ISOTECH ge -->
+<!ENTITY GreaterEqualLess "&#x022DB;" ><!--alias ISOAMSR gel -->
+<!ENTITY GreaterFullEqual "&#x02267;" ><!--alias ISOAMSR gE -->
+<!ENTITY GreaterLess      "&#x02277;" ><!--alias ISOAMSR gl -->
+<!ENTITY GreaterSlantEqual "&#x02A7E;" ><!--alias ISOAMSR ges -->
+<!ENTITY GreaterTilde     "&#x02273;" ><!--alias ISOAMSR gsim -->
+<!ENTITY gtrapprox        "&#x02A86;" ><!--alias ISOAMSR gap -->
+<!ENTITY gtrdot           "&#x022D7;" ><!--alias ISOAMSR gtdot -->
+<!ENTITY gtreqless        "&#x022DB;" ><!--alias ISOAMSR gel -->
+<!ENTITY gtreqqless       "&#x02A8C;" ><!--alias ISOAMSR gEl -->
+<!ENTITY gtrless          "&#x02277;" ><!--alias ISOAMSR gl -->
+<!ENTITY gtrsim           "&#x02273;" ><!--alias ISOAMSR gsim -->
+<!ENTITY gvertneqq        "&#x02269;&#x0FE00;" ><!--alias ISOAMSN gvnE -->
+<!ENTITY Hacek            "&#x002C7;" ><!--alias ISODIA caron -->
+<!ENTITY hbar             "&#x0210F;" ><!--alias ISOAMSO plank -->
+<!ENTITY heartsuit        "&#x02665;" ><!--ISOPUB hearts -->
+<!ENTITY HilbertSpace     "&#x0210B;" ><!--Hilbert space -->
+<!ENTITY hksearow         "&#x02925;" ><!--alias ISOAMSA searhk -->
+<!ENTITY hkswarow         "&#x02926;" ><!--alias ISOAMSA swarhk -->
+<!ENTITY hookleftarrow    "&#x021A9;" ><!--alias ISOAMSA larrhk -->
+<!ENTITY hookrightarrow   "&#x021AA;" ><!--alias ISOAMSA rarrhk -->
+<!ENTITY hslash           "&#x0210F;" ><!--alias ISOAMSO plankv -->
+<!ENTITY HumpDownHump     "&#x0224E;" ><!--alias ISOAMSR bump -->
+<!ENTITY HumpEqual        "&#x0224F;" ><!--alias ISOAMSR bumpe -->
+<!ENTITY iiiint           "&#x02A0C;" ><!--alias ISOTECH qint -->
+<!ENTITY iiint            "&#x0222D;" ><!--alias ISOTECH tint -->
+<!ENTITY Im               "&#x02111;" ><!--alias ISOAMSO image -->
+<!ENTITY ImaginaryI       "&#x02148;" ><!--i for use as a square root of -1 -->
+<!ENTITY imagline         "&#x02110;" ><!--the geometric imaginary line -->
+<!ENTITY imagpart         "&#x02111;" ><!--alias ISOAMSO image -->
+<!ENTITY Implies          "&#x021D2;" ><!--alias ISOTECH rArr -->
+<!ENTITY in               "&#x02208;" ><!--ISOTECH   isin  -->
+<!ENTITY integers         "&#x02124;" ><!--the ring of integers -->
+<!ENTITY Integral         "&#x0222B;" ><!--alias ISOTECH int -->
+<!ENTITY intercal         "&#x022BA;" ><!--alias ISOAMSB intcal -->
+<!ENTITY Intersection     "&#x022C2;" ><!--alias ISOAMSB xcap -->
+<!ENTITY intprod          "&#x02A3C;" ><!--alias ISOAMSB iprod -->
+<!ENTITY InvisibleComma   "&#x02063;" ><!--used as a separator, e.g., in indices -->
+<!ENTITY InvisibleTimes   "&#x02062;" ><!--marks multiplication when it is understood without a mark -->
+<!ENTITY langle           "&#x02329;" ><!--alias ISOTECH lang -->
+<!ENTITY Laplacetrf       "&#x02112;" ><!--Laplace transform -->
+<!ENTITY lbrace           "&#x0007B;" ><!--alias ISONUM lcub -->
+<!ENTITY lbrack           "&#x0005B;" ><!--alias ISONUM lsqb -->
+<!ENTITY LeftAngleBracket "&#x02329;" ><!--alias ISOTECH lang -->
+<!ENTITY LeftArrow        "&#x02190;" ><!--alias ISONUM larr -->
+<!ENTITY Leftarrow        "&#x021D0;" ><!--alias ISOTECH lArr -->
+<!ENTITY leftarrow        "&#x02190;" ><!--alias ISONUM larr -->
+<!ENTITY LeftArrowBar     "&#x021E4;" ><!--alias for larrb -->
+<!ENTITY LeftArrowRightArrow "&#x021C6;" ><!--alias ISOAMSA lrarr -->
+<!ENTITY leftarrowtail    "&#x021A2;" ><!--alias ISOAMSA larrtl -->
+<!ENTITY LeftCeiling      "&#x02308;" ><!--alias ISOAMSC lceil -->
+<!ENTITY LeftDoubleBracket "&#x0301A;" ><!--left double bracket delimiter -->
+<!ENTITY LeftDownVector   "&#x021C3;" ><!--alias ISOAMSA dharl -->
+<!ENTITY LeftFloor        "&#x0230A;" ><!--alias ISOAMSC lfloor -->
+<!ENTITY leftharpoondown  "&#x021BD;" ><!--alias ISOAMSA lhard -->
+<!ENTITY leftharpoonup    "&#x021BC;" ><!--alias ISOAMSA lharu -->
+<!ENTITY leftleftarrows   "&#x021C7;" ><!--alias ISOAMSA llarr -->
+<!ENTITY LeftRightArrow   "&#x02194;" ><!--alias ISOAMSA harr -->
+<!ENTITY Leftrightarrow   "&#x021D4;" ><!--alias ISOAMSA hArr -->
+<!ENTITY leftrightarrow   "&#x02194;" ><!--alias ISOAMSA harr -->
+<!ENTITY leftrightarrows  "&#x021C6;" ><!--alias ISOAMSA lrarr -->
+<!ENTITY leftrightharpoons "&#x021CB;" ><!--alias ISOAMSA lrhar -->
+<!ENTITY leftrightsquigarrow "&#x021AD;" ><!--alias ISOAMSA harrw -->
+<!ENTITY LeftTee          "&#x022A3;" ><!--alias ISOAMSR dashv -->
+<!ENTITY LeftTeeArrow     "&#x021A4;" ><!--alias for mapstoleft -->
+<!ENTITY leftthreetimes   "&#x022CB;" ><!--alias ISOAMSB lthree -->
+<!ENTITY LeftTriangle     "&#x022B2;" ><!--alias ISOAMSR vltri -->
+<!ENTITY LeftTriangleEqual "&#x022B4;" ><!--alias ISOAMSR ltrie -->
+<!ENTITY LeftUpVector     "&#x021BF;" ><!--alias ISOAMSA uharl -->
+<!ENTITY LeftVector       "&#x021BC;" ><!--alias ISOAMSA lharu -->
+<!ENTITY leq              "&#x02264;" ><!--alias ISOTECH le -->
+<!ENTITY leqq             "&#x02266;" ><!--alias ISOAMSR lE -->
+<!ENTITY leqslant         "&#x02A7D;" ><!--alias ISOAMSR les -->
+<!ENTITY lessapprox       "&#x02A85;" ><!--alias ISOAMSR lap -->
+<!ENTITY lessdot          "&#x022D6;" ><!--alias ISOAMSR ltdot -->
+<!ENTITY lesseqgtr        "&#x022DA;" ><!--alias ISOAMSR leg -->
+<!ENTITY lesseqqgtr       "&#x02A8B;" ><!--alias ISOAMSR lEg -->
+<!ENTITY LessEqualGreater "&#x022DA;" ><!--alias ISOAMSR leg -->
+<!ENTITY LessFullEqual    "&#x02266;" ><!--alias ISOAMSR lE -->
+<!ENTITY LessGreater      "&#x02276;" ><!--alias ISOAMSR lg -->
+<!ENTITY lessgtr          "&#x02276;" ><!--alias ISOAMSR lg -->
+<!ENTITY lesssim          "&#x02272;" ><!--alias ISOAMSR lsim -->
+<!ENTITY LessSlantEqual   "&#x02A7D;" ><!--alias ISOAMSR les -->
+<!ENTITY LessTilde        "&#x02272;" ><!--alias ISOAMSR lsim -->
+<!ENTITY ll               "&#x0226A;" ><!--alias ISOAMSR Lt -->
+<!ENTITY llcorner         "&#x0231E;" ><!--alias ISOAMSC dlcorn -->
+<!ENTITY Lleftarrow       "&#x021DA;" ><!--alias ISOAMSA lAarr -->
+<!ENTITY lmoustache       "&#x023B0;" ><!--alias ISOAMSC lmoust -->
+<!ENTITY lnapprox         "&#x02A89;" ><!--alias ISOAMSN lnap -->
+<!ENTITY lneq             "&#x02A87;" ><!--alias ISOAMSN lne -->
+<!ENTITY lneqq            "&#x02268;" ><!--alias ISOAMSN lnE -->
+<!ENTITY LongLeftArrow    "&#x027F5;" ><!--alias ISOAMSA xlarr -->
+<!ENTITY Longleftarrow    "&#x027F8;" ><!--alias ISOAMSA xlArr -->
+<!ENTITY longleftarrow    "&#x027F5;" ><!--alias ISOAMSA xlarr -->
+<!ENTITY LongLeftRightArrow "&#x027F7;" ><!--alias ISOAMSA xharr -->
+<!ENTITY Longleftrightarrow "&#x027FA;" ><!--alias ISOAMSA xhArr -->
+<!ENTITY longleftrightarrow "&#x027F7;" ><!--alias ISOAMSA xharr -->
+<!ENTITY longmapsto       "&#x027FC;" ><!--alias ISOAMSA xmap -->
+<!ENTITY LongRightArrow   "&#x027F6;" ><!--alias ISOAMSA xrarr -->
+<!ENTITY Longrightarrow   "&#x027F9;" ><!--alias ISOAMSA xrArr -->
+<!ENTITY longrightarrow   "&#x027F6;" ><!--alias ISOAMSA xrarr -->
+<!ENTITY looparrowleft    "&#x021AB;" ><!--alias ISOAMSA larrlp -->
+<!ENTITY looparrowright   "&#x021AC;" ><!--alias ISOAMSA rarrlp -->
+<!ENTITY LowerLeftArrow   "&#x02199;" ><!--alias ISOAMSA swarr -->
+<!ENTITY LowerRightArrow  "&#x02198;" ><!--alias ISOAMSA searr -->
+<!ENTITY lozenge          "&#x025CA;" ><!--alias ISOPUB loz -->
+<!ENTITY lrcorner         "&#x0231F;" ><!--alias ISOAMSC drcorn -->
+<!ENTITY Lsh              "&#x021B0;" ><!--alias ISOAMSA lsh -->
+<!ENTITY lvertneqq        "&#x02268;&#x0FE00;" ><!--alias ISOAMSN lvnE -->
+<!ENTITY maltese          "&#x02720;" ><!--alias ISOPUB malt -->
+<!ENTITY mapsto           "&#x021A6;" ><!--alias ISOAMSA map -->
+<!ENTITY measuredangle    "&#x02221;" ><!--alias ISOAMSO angmsd -->
+<!ENTITY Mellintrf        "&#x02133;" ><!--Mellin transform -->
+<!ENTITY MinusPlus        "&#x02213;" ><!--alias ISOTECH mnplus -->
+<!ENTITY mp               "&#x02213;" ><!--alias ISOTECH mnplus -->
+<!ENTITY multimap         "&#x022B8;" ><!--alias ISOAMSA mumap -->
+<!ENTITY napprox          "&#x02249;" ><!--alias ISOAMSN nap -->
+<!ENTITY natural          "&#x0266E;" ><!--alias ISOPUB natur -->
+<!ENTITY naturals         "&#x02115;" ><!--the semi-ring of natural numbers -->
+<!ENTITY nearrow          "&#x02197;" ><!--alias ISOAMSA nearr -->
+<!ENTITY NegativeMediumSpace "&#x0200B;" ><!--space of width -4/18 em -->
+<!ENTITY NegativeThickSpace "&#x0200B;" ><!--space of width -5/18 em -->
+<!ENTITY NegativeThinSpace "&#x0200B;" ><!--space of width -3/18 em -->
+<!ENTITY NegativeVeryThinSpace "&#x0200B;" ><!--space of width -1/18 em -->
+<!ENTITY NestedGreaterGreater "&#x0226B;" ><!--alias ISOAMSR Gt -->
+<!ENTITY NestedLessLess   "&#x0226A;" ><!--alias ISOAMSR Lt -->
+<!ENTITY nexists          "&#x02204;" ><!--alias ISOAMSO nexist -->
+<!ENTITY ngeq             "&#x02271;" ><!--alias ISOAMSN nge -->
+<!ENTITY ngeqq            "&#x02267;&#x00338;" ><!--alias ISOAMSN ngE -->
+<!ENTITY ngeqslant        "&#x02A7E;&#x00338;" ><!--alias ISOAMSN nges -->
+<!ENTITY ngtr             "&#x0226F;" ><!--alias ISOAMSN ngt -->
+<!ENTITY nLeftarrow       "&#x021CD;" ><!--alias ISOAMSA nlArr -->
+<!ENTITY nleftarrow       "&#x0219A;" ><!--alias ISOAMSA nlarr -->
+<!ENTITY nLeftrightarrow  "&#x021CE;" ><!--alias ISOAMSA nhArr -->
+<!ENTITY nleftrightarrow  "&#x021AE;" ><!--alias ISOAMSA nharr -->
+<!ENTITY nleq             "&#x02270;" ><!--alias ISOAMSN nle -->
+<!ENTITY nleqq            "&#x02266;&#x00338;" ><!--alias ISOAMSN nlE -->
+<!ENTITY nleqslant        "&#x02A7D;&#x00338;" ><!--alias ISOAMSN nles -->
+<!ENTITY nless            "&#x0226E;" ><!--alias ISOAMSN nlt -->
+<!ENTITY NonBreakingSpace "&#x000A0;" ><!--alias ISONUM nbsp -->
+<!ENTITY NotCongruent     "&#x02262;" ><!--alias ISOAMSN nequiv -->
+<!ENTITY NotDoubleVerticalBar "&#x02226;" ><!--alias ISOAMSN npar -->
+<!ENTITY NotElement       "&#x02209;" ><!--alias ISOTECH notin -->
+<!ENTITY NotEqual         "&#x02260;" ><!--alias ISOTECH ne -->
+<!ENTITY NotEqualTilde    "&#x02242;&#x00338;" ><!--alias for  &nesim; -->
+<!ENTITY NotExists        "&#x02204;" ><!--alias ISOAMSO nexist -->
+<!ENTITY NotGreater       "&#x0226F;" ><!--alias ISOAMSN ngt -->
+<!ENTITY NotGreaterEqual  "&#x02271;" ><!--alias ISOAMSN nge -->
+<!ENTITY NotGreaterFullEqual "&#x02266;&#x00338;" ><!--alias ISOAMSN nlE -->
+<!ENTITY NotGreaterGreater "&#x0226B;&#x00338;" ><!--alias ISOAMSN nGtv -->
+<!ENTITY NotGreaterLess   "&#x02279;" ><!--alias ISOAMSN ntvgl -->
+<!ENTITY NotGreaterSlantEqual "&#x02A7E;&#x00338;" ><!--alias ISOAMSN nges -->
+<!ENTITY NotGreaterTilde  "&#x02275;" ><!--alias ISOAMSN ngsim -->
+<!ENTITY NotHumpDownHump  "&#x0224E;&#x00338;" ><!--alias for &nbump; -->
+<!ENTITY NotLeftTriangle  "&#x022EA;" ><!--alias ISOAMSN nltri -->
+<!ENTITY NotLeftTriangleEqual "&#x022EC;" ><!--alias ISOAMSN nltrie -->
+<!ENTITY NotLess          "&#x0226E;" ><!--alias ISOAMSN nlt -->
+<!ENTITY NotLessEqual     "&#x02270;" ><!--alias ISOAMSN nle -->
+<!ENTITY NotLessGreater   "&#x02278;" ><!--alias ISOAMSN ntvlg -->
+<!ENTITY NotLessLess      "&#x0226A;&#x00338;" ><!--alias ISOAMSN nLtv -->
+<!ENTITY NotLessSlantEqual "&#x02A7D;&#x00338;" ><!--alias ISOAMSN nles -->
+<!ENTITY NotLessTilde     "&#x02274;" ><!--alias ISOAMSN nlsim -->
+<!ENTITY NotPrecedes      "&#x02280;" ><!--alias ISOAMSN npr -->
+<!ENTITY NotPrecedesEqual "&#x02AAF;&#x00338;" ><!--alias ISOAMSN npre -->
+<!ENTITY NotPrecedesSlantEqual "&#x022E0;" ><!--alias ISOAMSN nprcue -->
+<!ENTITY NotReverseElement "&#x0220C;" ><!--alias ISOTECH notniva -->
+<!ENTITY NotRightTriangle "&#x022EB;" ><!--alias ISOAMSN nrtri -->
+<!ENTITY NotRightTriangleEqual "&#x022ED;" ><!--alias ISOAMSN nrtrie -->
+<!ENTITY NotSquareSubsetEqual "&#x022E2;" ><!--alias ISOAMSN nsqsube -->
+<!ENTITY NotSquareSupersetEqual "&#x022E3;" ><!--alias ISOAMSN nsqsupe -->
+<!ENTITY NotSubset        "&#x02282;&#x020D2;" ><!--alias ISOAMSN vnsub -->
+<!ENTITY NotSubsetEqual   "&#x02288;" ><!--alias ISOAMSN nsube -->
+<!ENTITY NotSucceeds      "&#x02281;" ><!--alias ISOAMSN nsc -->
+<!ENTITY NotSucceedsEqual "&#x02AB0;&#x00338;" ><!--alias ISOAMSN nsce -->
+<!ENTITY NotSucceedsSlantEqual "&#x022E1;" ><!--alias ISOAMSN nsccue -->
+<!ENTITY NotSuperset      "&#x02283;&#x020D2;" ><!--alias ISOAMSN vnsup -->
+<!ENTITY NotSupersetEqual "&#x02289;" ><!--alias ISOAMSN nsupe -->
+<!ENTITY NotTilde         "&#x02241;" ><!--alias ISOAMSN nsim -->
+<!ENTITY NotTildeEqual    "&#x02244;" ><!--alias ISOAMSN nsime -->
+<!ENTITY NotTildeFullEqual "&#x02247;" ><!--alias ISOAMSN ncong -->
+<!ENTITY NotTildeTilde    "&#x02249;" ><!--alias ISOAMSN nap -->
+<!ENTITY NotVerticalBar   "&#x02224;" ><!--alias ISOAMSN nmid -->
+<!ENTITY nparallel        "&#x02226;" ><!--alias ISOAMSN npar -->
+<!ENTITY nprec            "&#x02280;" ><!--alias ISOAMSN npr -->
+<!ENTITY npreceq          "&#x02AAF;&#x00338;" ><!--alias ISOAMSN npre -->
+<!ENTITY nRightarrow      "&#x021CF;" ><!--alias ISOAMSA nrArr -->
+<!ENTITY nrightarrow      "&#x0219B;" ><!--alias ISOAMSA nrarr -->
+<!ENTITY nshortmid        "&#x02224;" ><!--alias ISOAMSN nsmid -->
+<!ENTITY nshortparallel   "&#x02226;" ><!--alias ISOAMSN nspar -->
+<!ENTITY nsimeq           "&#x02244;" ><!--alias ISOAMSN nsime -->
+<!ENTITY nsubset          "&#x02282;&#x020D2;" ><!--alias ISOAMSN vnsub -->
+<!ENTITY nsubseteq        "&#x02288;" ><!--alias ISOAMSN nsube -->
+<!ENTITY nsubseteqq       "&#x02AC5;&#x00338;" ><!--alias ISOAMSN nsubE -->
+<!ENTITY nsucc            "&#x02281;" ><!--alias ISOAMSN nsc -->
+<!ENTITY nsucceq          "&#x02AB0;&#x00338;" ><!--alias ISOAMSN nsce -->
+<!ENTITY nsupset          "&#x02283;&#x020D2;" ><!--alias ISOAMSN vnsup -->
+<!ENTITY nsupseteq        "&#x02289;" ><!--alias ISOAMSN nsupe -->
+<!ENTITY nsupseteqq       "&#x02AC6;&#x00338;" ><!--alias ISOAMSN nsupE -->
+<!ENTITY ntriangleleft    "&#x022EA;" ><!--alias ISOAMSN nltri -->
+<!ENTITY ntrianglelefteq  "&#x022EC;" ><!--alias ISOAMSN nltrie -->
+<!ENTITY ntriangleright   "&#x022EB;" ><!--alias ISOAMSN nrtri -->
+<!ENTITY ntrianglerighteq "&#x022ED;" ><!--alias ISOAMSN nrtrie -->
+<!ENTITY nwarrow          "&#x02196;" ><!--alias ISOAMSA nwarr -->
+<!ENTITY oint             "&#x0222E;" ><!--alias ISOTECH conint -->
+<!ENTITY OpenCurlyDoubleQuote "&#x0201C;" ><!--alias ISONUM ldquo -->
+<!ENTITY OpenCurlyQuote   "&#x02018;" ><!--alias ISONUM lsquo -->
+<!ENTITY orderof          "&#x02134;" ><!--alias ISOTECH order -->
+<!ENTITY parallel         "&#x02225;" ><!--alias ISOTECH par -->
+<!ENTITY PartialD         "&#x02202;" ><!--alias ISOTECH part -->
+<!ENTITY pitchfork        "&#x022D4;" ><!--alias ISOAMSR fork -->
+<!ENTITY PlusMinus        "&#x000B1;" ><!--alias ISONUM plusmn -->
+<!ENTITY pm               "&#x000B1;" ><!--alias ISONUM plusmn -->
+<!ENTITY Poincareplane    "&#x0210C;" ><!--the Poincare upper half-plane -->
+<!ENTITY prec             "&#x0227A;" ><!--alias ISOAMSR pr -->
+<!ENTITY precapprox       "&#x02AB7;" ><!--alias ISOAMSR prap -->
+<!ENTITY preccurlyeq      "&#x0227C;" ><!--alias ISOAMSR prcue -->
+<!ENTITY Precedes         "&#x0227A;" ><!--alias ISOAMSR pr -->
+<!ENTITY PrecedesEqual    "&#x02AAF;" ><!--alias ISOAMSR pre -->
+<!ENTITY PrecedesSlantEqual "&#x0227C;" ><!--alias ISOAMSR prcue -->
+<!ENTITY PrecedesTilde    "&#x0227E;" ><!--alias ISOAMSR prsim -->
+<!ENTITY preceq           "&#x02AAF;" ><!--alias ISOAMSR pre -->
+<!ENTITY precnapprox      "&#x02AB9;" ><!--alias ISOAMSN prnap -->
+<!ENTITY precneqq         "&#x02AB5;" ><!--alias ISOAMSN prnE -->
+<!ENTITY precnsim         "&#x022E8;" ><!--alias ISOAMSN prnsim -->
+<!ENTITY precsim          "&#x0227E;" ><!--alias ISOAMSR prsim -->
+<!ENTITY primes           "&#x02119;" ><!--the prime natural numbers -->
+<!ENTITY Proportion       "&#x02237;" ><!--alias ISOAMSR Colon -->
+<!ENTITY Proportional     "&#x0221D;" ><!--alias ISOTECH prop -->
+<!ENTITY propto           "&#x0221D;" ><!--alias ISOTECH prop -->
+<!ENTITY quaternions      "&#x0210D;" ><!--the ring (skew field) of quaternions -->
+<!ENTITY questeq          "&#x0225F;" ><!--alias ISOAMSR equest -->
+<!ENTITY rangle           "&#x0232A;" ><!--alias ISOTECH rang -->
+<!ENTITY rationals        "&#x0211A;" ><!--the field of rational numbers -->
+<!ENTITY rbrace           "&#x0007D;" ><!--alias ISONUM rcub -->
+<!ENTITY rbrack           "&#x0005D;" ><!--alias ISONUM rsqb -->
+<!ENTITY Re               "&#x0211C;" ><!--alias ISOAMSO real -->
+<!ENTITY realine          "&#x0211B;" ><!--the geometric real line -->
+<!ENTITY realpart         "&#x0211C;" ><!--alias ISOAMSO real -->
+<!ENTITY reals            "&#x0211D;" ><!--the field of real numbers -->
+<!ENTITY ReverseElement   "&#x0220B;" ><!--alias ISOTECH niv -->
+<!ENTITY ReverseEquilibrium "&#x021CB;" ><!--alias ISOAMSA lrhar -->
+<!ENTITY ReverseUpEquilibrium "&#x0296F;" ><!--alias ISOAMSA duhar -->
+<!ENTITY RightAngleBracket "&#x0232A;" ><!--alias ISOTECH rang -->
+<!ENTITY RightArrow       "&#x02192;" ><!--alias ISONUM rarr -->
+<!ENTITY Rightarrow       "&#x021D2;" ><!--alias ISOTECH rArr -->
+<!ENTITY rightarrow       "&#x02192;" ><!--alias ISONUM rarr -->
+<!ENTITY RightArrowBar    "&#x021E5;" ><!--alias for rarrb -->
+<!ENTITY RightArrowLeftArrow "&#x021C4;" ><!--alias ISOAMSA rlarr -->
+<!ENTITY rightarrowtail   "&#x021A3;" ><!--alias ISOAMSA rarrtl -->
+<!ENTITY RightCeiling     "&#x02309;" ><!--alias ISOAMSC rceil -->
+<!ENTITY RightDoubleBracket "&#x0301B;" ><!--right double bracket delimiter -->
+<!ENTITY RightDownVector  "&#x021C2;" ><!--alias ISOAMSA dharr -->
+<!ENTITY RightFloor       "&#x0230B;" ><!--alias ISOAMSC rfloor -->
+<!ENTITY rightharpoondown "&#x021C1;" ><!--alias ISOAMSA rhard -->
+<!ENTITY rightharpoonup   "&#x021C0;" ><!--alias ISOAMSA rharu -->
+<!ENTITY rightleftarrows  "&#x021C4;" ><!--alias ISOAMSA rlarr -->
+<!ENTITY rightleftharpoons "&#x021CC;" ><!--alias ISOAMSA rlhar -->
+<!ENTITY rightrightarrows "&#x021C9;" ><!--alias ISOAMSA rrarr -->
+<!ENTITY rightsquigarrow  "&#x0219D;" ><!--alias ISOAMSA rarrw -->
+<!ENTITY RightTee         "&#x022A2;" ><!--alias ISOAMSR vdash -->
+<!ENTITY RightTeeArrow    "&#x021A6;" ><!--alias ISOAMSA map -->
+<!ENTITY rightthreetimes  "&#x022CC;" ><!--alias ISOAMSB rthree -->
+<!ENTITY RightTriangle    "&#x022B3;" ><!--alias ISOAMSR vrtri -->
+<!ENTITY RightTriangleEqual "&#x022B5;" ><!--alias ISOAMSR rtrie -->
+<!ENTITY RightUpVector    "&#x021BE;" ><!--alias ISOAMSA uharr -->
+<!ENTITY RightVector      "&#x021C0;" ><!--alias ISOAMSA rharu -->
+<!ENTITY risingdotseq     "&#x02253;" ><!--alias ISOAMSR erDot -->
+<!ENTITY rmoustache       "&#x023B1;" ><!--alias ISOAMSC rmoust -->
+<!ENTITY Rrightarrow      "&#x021DB;" ><!--alias ISOAMSA rAarr -->
+<!ENTITY Rsh              "&#x021B1;" ><!--alias ISOAMSA rsh -->
+<!ENTITY searrow          "&#x02198;" ><!--alias ISOAMSA searr -->
+<!ENTITY setminus         "&#x02216;" ><!--alias ISOAMSB setmn -->
+<!ENTITY ShortDownArrow   "&#x02193;" ><!--short down arrow -->
+<!ENTITY ShortLeftArrow   "&#x02190;" ><!--alias ISOAMSA slarr -->
+<!ENTITY shortmid         "&#x02223;" ><!--alias ISOAMSR smid -->
+<!ENTITY shortparallel    "&#x02225;" ><!--alias ISOAMSR spar -->
+<!ENTITY ShortRightArrow  "&#x02192;" ><!--alias ISOAMSA srarr -->
+<!ENTITY ShortUpArrow     "&#x02191;" ><!--short up arrow  -->
+<!ENTITY simeq            "&#x02243;" ><!--alias ISOTECH sime -->
+<!ENTITY SmallCircle      "&#x02218;" ><!--alias ISOTECH compfn -->
+<!ENTITY smallsetminus    "&#x02216;" ><!--alias ISOAMSB ssetmn -->
+<!ENTITY spadesuit        "&#x02660;" ><!--ISOPUB    spades  -->
+<!ENTITY Sqrt             "&#x0221A;" ><!--alias ISOTECH radic -->
+<!ENTITY sqsubset         "&#x0228F;" ><!--alias ISOAMSR sqsub -->
+<!ENTITY sqsubseteq       "&#x02291;" ><!--alias ISOAMSR sqsube -->
+<!ENTITY sqsupset         "&#x02290;" ><!--alias ISOAMSR sqsup -->
+<!ENTITY sqsupseteq       "&#x02292;" ><!--alias ISOAMSR sqsupe -->
+<!ENTITY Square           "&#x025A1;" ><!--alias for square -->
+<!ENTITY SquareIntersection "&#x02293;" ><!--alias ISOAMSB sqcap -->
+<!ENTITY SquareSubset     "&#x0228F;" ><!--alias ISOAMSR sqsub -->
+<!ENTITY SquareSubsetEqual "&#x02291;" ><!--alias ISOAMSR sqsube -->
+<!ENTITY SquareSuperset   "&#x02290;" ><!--alias ISOAMSR sqsup -->
+<!ENTITY SquareSupersetEqual "&#x02292;" ><!--alias ISOAMSR sqsupe -->
+<!ENTITY SquareUnion      "&#x02294;" ><!--alias ISOAMSB sqcup -->
+<!ENTITY Star             "&#x022C6;" ><!--alias ISOAMSB sstarf -->
+<!ENTITY straightepsilon  "&#x003F5;" ><!--alias ISOGRK3 epsi -->
+<!ENTITY straightphi      "&#x003D5;" ><!--alias ISOGRK3 phi -->
+<!ENTITY Subset           "&#x022D0;" ><!--alias ISOAMSR Sub -->
+<!ENTITY subset           "&#x02282;" ><!--alias ISOTECH sub -->
+<!ENTITY subseteq         "&#x02286;" ><!--alias ISOTECH sube -->
+<!ENTITY subseteqq        "&#x02AC5;" ><!--alias ISOAMSR subE -->
+<!ENTITY SubsetEqual      "&#x02286;" ><!--alias ISOTECH sube -->
+<!ENTITY subsetneq        "&#x0228A;" ><!--alias ISOAMSN subne -->
+<!ENTITY subsetneqq       "&#x02ACB;" ><!--alias ISOAMSN subnE -->
+<!ENTITY succ             "&#x0227B;" ><!--alias ISOAMSR sc -->
+<!ENTITY succapprox       "&#x02AB8;" ><!--alias ISOAMSR scap -->
+<!ENTITY succcurlyeq      "&#x0227D;" ><!--alias ISOAMSR sccue -->
+<!ENTITY Succeeds         "&#x0227B;" ><!--alias ISOAMSR sc -->
+<!ENTITY SucceedsEqual    "&#x02AB0;" ><!--alias ISOAMSR sce -->
+<!ENTITY SucceedsSlantEqual "&#x0227D;" ><!--alias ISOAMSR sccue -->
+<!ENTITY SucceedsTilde    "&#x0227F;" ><!--alias ISOAMSR scsim -->
+<!ENTITY succeq           "&#x02AB0;" ><!--alias ISOAMSR sce -->
+<!ENTITY succnapprox      "&#x02ABA;" ><!--alias ISOAMSN scnap -->
+<!ENTITY succneqq         "&#x02AB6;" ><!--alias ISOAMSN scnE -->
+<!ENTITY succnsim         "&#x022E9;" ><!--alias ISOAMSN scnsim -->
+<!ENTITY succsim          "&#x0227F;" ><!--alias ISOAMSR scsim -->
+<!ENTITY SuchThat         "&#x0220B;" ><!--ISOTECH  ni -->
+<!ENTITY Sum              "&#x02211;" ><!--alias ISOAMSB sum -->
+<!ENTITY Superset         "&#x02283;" ><!--alias ISOTECH sup -->
+<!ENTITY SupersetEqual    "&#x02287;" ><!--alias ISOTECH supe -->
+<!ENTITY Supset           "&#x022D1;" ><!--alias ISOAMSR Sup -->
+<!ENTITY supset           "&#x02283;" ><!--alias ISOTECH sup -->
+<!ENTITY supseteq         "&#x02287;" ><!--alias ISOTECH supe -->
+<!ENTITY supseteqq        "&#x02AC6;" ><!--alias ISOAMSR supE -->
+<!ENTITY supsetneq        "&#x0228B;" ><!--alias ISOAMSN supne -->
+<!ENTITY supsetneqq       "&#x02ACC;" ><!--alias ISOAMSN supnE -->
+<!ENTITY swarrow          "&#x02199;" ><!--alias ISOAMSA swarr -->
+<!ENTITY Therefore        "&#x02234;" ><!--alias ISOTECH there4 -->
+<!ENTITY therefore        "&#x02234;" ><!--alias ISOTECH there4 -->
+<!ENTITY thickapprox      "&#x02248;" ><!--ISOAMSR   thkap  -->
+<!ENTITY thicksim         "&#x0223C;" ><!--ISOAMSR   thksim -->
+<!ENTITY ThinSpace        "&#x02009;" ><!--space of width 3/18 em alias ISOPUB thinsp -->
+<!ENTITY Tilde            "&#x0223C;" ><!--alias ISOTECH sim -->
+<!ENTITY TildeEqual       "&#x02243;" ><!--alias ISOTECH sime -->
+<!ENTITY TildeFullEqual   "&#x02245;" ><!--alias ISOTECH cong -->
+<!ENTITY TildeTilde       "&#x02248;" ><!--alias ISOTECH ap -->
+<!ENTITY toea             "&#x02928;" ><!--alias ISOAMSA nesear -->
+<!ENTITY tosa             "&#x02929;" ><!--alias ISOAMSA seswar -->
+<!ENTITY triangle         "&#x025B5;" ><!--alias ISOPUB utri -->
+<!ENTITY triangledown     "&#x025BF;" ><!--alias ISOPUB dtri -->
+<!ENTITY triangleleft     "&#x025C3;" ><!--alias ISOPUB ltri -->
+<!ENTITY trianglelefteq   "&#x022B4;" ><!--alias ISOAMSR ltrie -->
+<!ENTITY triangleq        "&#x0225C;" ><!--alias ISOAMSR trie -->
+<!ENTITY triangleright    "&#x025B9;" ><!--alias ISOPUB rtri -->
+<!ENTITY trianglerighteq  "&#x022B5;" ><!--alias ISOAMSR rtrie -->
+<!ENTITY TripleDot        "&#x020DB;" ><!--alias ISOTECH tdot -->
+<!ENTITY twoheadleftarrow "&#x0219E;" ><!--alias ISOAMSA Larr -->
+<!ENTITY twoheadrightarrow "&#x021A0;" ><!--alias ISOAMSA Rarr -->
+<!ENTITY ulcorner         "&#x0231C;" ><!--alias ISOAMSC ulcorn -->
+<!ENTITY Union            "&#x022C3;" ><!--alias ISOAMSB xcup -->
+<!ENTITY UnionPlus        "&#x0228E;" ><!--alias ISOAMSB uplus -->
+<!ENTITY UpArrow          "&#x02191;" ><!--alias ISONUM uarr -->
+<!ENTITY Uparrow          "&#x021D1;" ><!--alias ISOAMSA uArr -->
+<!ENTITY uparrow          "&#x02191;" ><!--alias ISONUM uarr -->
+<!ENTITY UpArrowDownArrow "&#x021C5;" ><!--alias ISOAMSA udarr -->
+<!ENTITY UpDownArrow      "&#x02195;" ><!--alias ISOAMSA varr -->
+<!ENTITY Updownarrow      "&#x021D5;" ><!--alias ISOAMSA vArr -->
+<!ENTITY updownarrow      "&#x02195;" ><!--alias ISOAMSA varr -->
+<!ENTITY UpEquilibrium    "&#x0296E;" ><!--alias ISOAMSA udhar -->
+<!ENTITY upharpoonleft    "&#x021BF;" ><!--alias ISOAMSA uharl -->
+<!ENTITY upharpoonright   "&#x021BE;" ><!--alias ISOAMSA uharr -->
+<!ENTITY UpperLeftArrow   "&#x02196;" ><!--alias ISOAMSA nwarr -->
+<!ENTITY UpperRightArrow  "&#x02197;" ><!--alias ISOAMSA nearr -->
+<!ENTITY upsilon          "&#x003C5;" ><!--alias ISOGRK3 upsi -->
+<!ENTITY UpTee            "&#x022A5;" ><!--alias ISOTECH perp -->
+<!ENTITY UpTeeArrow       "&#x021A5;" ><!--Alias mapstoup -->
+<!ENTITY upuparrows       "&#x021C8;" ><!--alias ISOAMSA uuarr -->
+<!ENTITY urcorner         "&#x0231D;" ><!--alias ISOAMSC urcorn -->
+<!ENTITY varepsilon       "&#x003B5;" ><!--alias ISOGRK3 epsiv -->
+<!ENTITY varkappa         "&#x003F0;" ><!--alias ISOGRK3 kappav -->
+<!ENTITY varnothing       "&#x02205;" ><!--alias ISOAMSO emptyv -->
+<!ENTITY varphi           "&#x003C6;" ><!--alias ISOGRK3 phiv -->
+<!ENTITY varpi            "&#x003D6;" ><!--alias ISOGRK3 piv -->
+<!ENTITY varpropto        "&#x0221D;" ><!--alias ISOAMSR vprop -->
+<!ENTITY varrho           "&#x003F1;" ><!--alias ISOGRK3 rhov -->
+<!ENTITY varsigma         "&#x003C2;" ><!--alias ISOGRK3 sigmav -->
+<!ENTITY varsubsetneq     "&#x0228A;&#x0FE00;" ><!--alias ISOAMSN vsubne -->
+<!ENTITY varsubsetneqq    "&#x02ACB;&#x0FE00;" ><!--alias ISOAMSN vsubnE -->
+<!ENTITY varsupsetneq     "&#x0228B;&#x0FE00;" ><!--alias ISOAMSN vsupne -->
+<!ENTITY varsupsetneqq    "&#x02ACC;&#x0FE00;" ><!--alias ISOAMSN vsupnE -->
+<!ENTITY vartheta         "&#x003D1;" ><!--alias ISOGRK3 thetav -->
+<!ENTITY vartriangleleft  "&#x022B2;" ><!--alias ISOAMSR vltri -->
+<!ENTITY vartriangleright "&#x022B3;" ><!--alias ISOAMSR vrtri -->
+<!ENTITY Vee              "&#x022C1;" ><!--alias ISOAMSB xvee -->
+<!ENTITY vee              "&#x02228;" ><!--alias ISOTECH or -->
+<!ENTITY Vert             "&#x02016;" ><!--alias ISOTECH Verbar -->
+<!ENTITY vert             "&#x0007C;" ><!--alias ISONUM verbar -->
+<!ENTITY VerticalBar      "&#x02223;" ><!--alias ISOAMSR mid -->
+<!ENTITY VerticalTilde    "&#x02240;" ><!--alias ISOAMSB wreath -->
+<!ENTITY VeryThinSpace    "&#x0200A;" ><!--space of width 1/18 em alias ISOPUB hairsp -->
+<!ENTITY Wedge            "&#x022C0;" ><!--alias ISOAMSB xwedge -->
+<!ENTITY wedge            "&#x02227;" ><!--alias ISOTECH and -->
+<!ENTITY wp               "&#x02118;" ><!--alias ISOAMSO weierp -->
+<!ENTITY wr               "&#x02240;" ><!--alias ISOAMSB wreath -->
+<!ENTITY zeetrf           "&#x02128;" ><!--zee transform -->
diff --git a/dtd/mmlextra.ent b/dtd/mmlextra.ent
new file mode 100644
index 0000000..850c7e7
--- /dev/null
+++ b/dtd/mmlextra.ent
@@ -0,0 +1,122 @@
+
+<!--
+     File mmlextra.ent produced by the XSL script characters.xsl
+     from input data in unicode.xml.
+
+     Please report any errors to David Carlisle
+     via the public W3C list www-math@w3.org.
+
+     The numeric character values assigned to each entity
+     (should) match the Unicode assignments in Unicode 4.0.
+
+-->
+
+<!ENTITY % plane1D  "&#38;#38;#x1D">
+
+<!ENTITY af               "&#x02061;" ><!--character showing function application in presentation tagging -->
+<!ENTITY aopf             "%plane1D;552;" ><!-- -->
+<!ENTITY asympeq          "&#x0224D;" ><!--Old ISOAMSR asymp (for HTML compatibility) -->
+<!ENTITY bopf             "%plane1D;553;" ><!-- -->
+<!ENTITY copf             "%plane1D;554;" ><!-- -->
+<!ENTITY Cross            "&#x02A2F;" ><!--cross or vector product -->
+<!ENTITY DD               "&#x02145;" ><!--D for use in differentials, e.g., within integrals -->
+<!ENTITY dd               "&#x02146;" ><!--d for use in differentials, e.g., within integrals -->
+<!ENTITY dopf             "%plane1D;555;" ><!-- -->
+<!ENTITY DownArrowBar     "&#x02913;" ><!--down arrow to bar -->
+<!ENTITY DownBreve        "&#x00311;" ><!--breve, inverted (non-spacing) -->
+<!ENTITY DownLeftRightVector "&#x02950;" ><!--left-down-right-down harpoon -->
+<!ENTITY DownLeftTeeVector "&#x0295E;" ><!--left-down harpoon from bar -->
+<!ENTITY DownLeftVectorBar "&#x02956;" ><!--left-down harpoon to bar -->
+<!ENTITY DownRightTeeVector "&#x0295F;" ><!--right-down harpoon from bar -->
+<!ENTITY DownRightVectorBar "&#x02957;" ><!--right-down harpoon to bar -->
+<!ENTITY ee               "&#x02147;" ><!--e use for the exponential base of the natural logarithms -->
+<!ENTITY EmptySmallSquare "&#x025FB;" ><!--empty small square -->
+<!ENTITY EmptyVerySmallSquare "&#x025AB;" ><!--empty small square -->
+<!ENTITY eopf             "%plane1D;556;" ><!-- -->
+<!ENTITY Equal            "&#x02A75;" ><!--two consecutive equal signs -->
+<!ENTITY FilledSmallSquare "&#x025FC;" ><!--filled small square -->
+<!ENTITY FilledVerySmallSquare "&#x025AA;" ><!--filled very small square -->
+<!ENTITY fopf             "%plane1D;557;" ><!-- -->
+<!ENTITY gopf             "%plane1D;558;" ><!-- -->
+<!ENTITY GreaterGreater   "&#x02AA2;" ><!--alias for GT -->
+<!ENTITY Hat              "&#x0005E;" ><!--circumflex accent -->
+<!ENTITY hopf             "%plane1D;559;" ><!-- -->
+<!ENTITY HorizontalLine   "&#x02500;" ><!--short horizontal line  -->
+<!ENTITY ic               "&#x02063;" ><!--short form of  &InvisibleComma; -->
+<!ENTITY ii               "&#x02148;" ><!--i for use as a square root of -1 -->
+<!ENTITY iopf             "%plane1D;55A;" ><!-- -->
+<!ENTITY it               "&#x02062;" ><!--marks multiplication when it is understood without a mark -->
+<!ENTITY jopf             "%plane1D;55B;" ><!-- -->
+<!ENTITY kopf             "%plane1D;55C;" ><!-- -->
+<!ENTITY larrb            "&#x021E4;" ><!--leftwards arrow to bar -->
+<!ENTITY LeftDownTeeVector "&#x02961;" ><!--down-left harpoon from bar -->
+<!ENTITY LeftDownVectorBar "&#x02959;" ><!--down-left harpoon to bar -->
+<!ENTITY LeftRightVector  "&#x0294E;" ><!--left-up-right-up harpoon -->
+<!ENTITY LeftTeeVector    "&#x0295A;" ><!--left-up harpoon from bar -->
+<!ENTITY LeftTriangleBar  "&#x029CF;" ><!--left triangle, vertical bar -->
+<!ENTITY LeftUpDownVector "&#x02951;" ><!--up-left-down-left harpoon -->
+<!ENTITY LeftUpTeeVector  "&#x02960;" ><!--up-left harpoon from bar -->
+<!ENTITY LeftUpVectorBar  "&#x02958;" ><!--up-left harpoon to bar -->
+<!ENTITY LeftVectorBar    "&#x02952;" ><!--left-up harpoon to bar -->
+<!ENTITY LessLess         "&#x02AA1;" ><!--alias for Lt -->
+<!ENTITY lopf             "%plane1D;55D;" ><!-- -->
+<!ENTITY mapstodown       "&#x021A7;" ><!--downwards arrow from bar -->
+<!ENTITY mapstoleft       "&#x021A4;" ><!--leftwards arrow from bar -->
+<!ENTITY mapstoup         "&#x021A5;" ><!--upwards arrow from bar -->
+<!ENTITY MediumSpace      "&#x0205F;" ><!--space of width 4/18 em -->
+<!ENTITY mopf             "%plane1D;55E;" ><!-- -->
+<!ENTITY nbump            "&#x0224E;&#x00338;" ><!--not bumpy equals -->
+<!ENTITY nbumpe           "&#x0224F;&#x00338;" ><!--not bumpy single equals -->
+<!ENTITY nesim            "&#x02242;&#x00338;" ><!--not equal or similar -->
+<!ENTITY NewLine          "&#x0000A;" ><!--force a line break; line feed -->
+<!ENTITY NoBreak          "&#x02060;" ><!--never break line here -->
+<!ENTITY nopf             "%plane1D;55F;" ><!-- -->
+<!ENTITY NotCupCap        "&#x0226D;" ><!--alias for &nasymp; -->
+<!ENTITY NotHumpEqual     "&#x0224F;&#x00338;" ><!--alias for &nbumpe; -->
+<!ENTITY NotLeftTriangleBar "&#x029CF;&#x00338;" ><!--not left triangle, vertical bar -->
+<!ENTITY NotNestedGreaterGreater "&#x02AA2;&#x00338;" ><!--not double greater-than sign -->
+<!ENTITY NotNestedLessLess "&#x02AA1;&#x00338;" ><!--not double less-than sign -->
+<!ENTITY NotRightTriangleBar "&#x029D0;&#x00338;" ><!--not vertical bar, right triangle -->
+<!ENTITY NotSquareSubset  "&#x0228F;&#x00338;" ><!--square not subset -->
+<!ENTITY NotSquareSuperset "&#x02290;&#x00338;" ><!--negated set-like partial order operator -->
+<!ENTITY NotSucceedsTilde "&#x0227F;&#x00338;" ><!--not succeeds or similar -->
+<!ENTITY oopf             "%plane1D;560;" ><!-- -->
+<!ENTITY OverBar          "&#x000AF;" ><!--over bar -->
+<!ENTITY OverBrace        "&#x0FE37;" ><!--over brace  -->
+<!ENTITY OverBracket      "&#x023B4;" ><!--over bracket -->
+<!ENTITY OverParenthesis  "&#x0FE35;" ><!--over parenthesis -->
+<!ENTITY planckh          "&#x0210E;" ><!--the ring (skew field) of quaternions -->
+<!ENTITY popf             "%plane1D;561;" ><!-- -->
+<!ENTITY Product          "&#x0220F;" ><!--alias for &prod; -->
+<!ENTITY qopf             "%plane1D;562;" ><!-- -->
+<!ENTITY rarrb            "&#x021E5;" ><!--leftwards arrow to bar -->
+<!ENTITY RightDownTeeVector "&#x0295D;" ><!--down-right harpoon from bar -->
+<!ENTITY RightDownVectorBar "&#x02955;" ><!--down-right harpoon to bar -->
+<!ENTITY RightTeeVector   "&#x0295B;" ><!--right-up harpoon from bar -->
+<!ENTITY RightTriangleBar "&#x029D0;" ><!--vertical bar, right triangle -->
+<!ENTITY RightUpDownVector "&#x0294F;" ><!--up-right-down-right harpoon -->
+<!ENTITY RightUpTeeVector "&#x0295C;" ><!--up-right harpoon from bar -->
+<!ENTITY RightUpVectorBar "&#x02954;" ><!--up-right harpoon to bar -->
+<!ENTITY RightVectorBar   "&#x02953;" ><!--up-right harpoon to bar -->
+<!ENTITY ropf             "%plane1D;563;" ><!-- -->
+<!ENTITY RoundImplies     "&#x02970;" ><!--round implies -->
+<!ENTITY RuleDelayed      "&#x029F4;" ><!--rule-delayed (colon right arrow) -->
+<!ENTITY sopf             "%plane1D;564;" ><!-- -->
+<!ENTITY Tab              "&#x00009;" ><!--tabulator stop; horizontal tabulation -->
+<!ENTITY ThickSpace       "&#x02009;&#x0200A;&#x0200A;" ><!--space of width 5/18 em -->
+<!ENTITY topf             "%plane1D;565;" ><!-- -->
+<!ENTITY UnderBar         "&#x00332;" ><!--combining low line -->
+<!ENTITY UnderBrace       "&#x0FE38;" ><!--under brace  -->
+<!ENTITY UnderBracket     "&#x023B5;" ><!--under bracket -->
+<!ENTITY UnderParenthesis "&#x0FE36;" ><!--under parenthesis -->
+<!ENTITY uopf             "%plane1D;566;" ><!-- -->
+<!ENTITY UpArrowBar       "&#x02912;" ><!--up arrow to bar -->
+<!ENTITY Upsilon          "&#x003A5;" ><!--ISOGRK1 Ugr, HTML4 Upsilon -->
+<!ENTITY VerticalLine     "&#x0007C;" ><!--alias ISONUM verbar -->
+<!ENTITY VerticalSeparator "&#x02758;" ><!--vertical separating operator -->
+<!ENTITY vopf             "%plane1D;567;" ><!-- -->
+<!ENTITY wopf             "%plane1D;568;" ><!-- -->
+<!ENTITY xopf             "%plane1D;569;" ><!-- -->
+<!ENTITY yopf             "%plane1D;56A;" ><!-- -->
+<!ENTITY ZeroWidthSpace   "&#x0200B;" ><!--zero width space -->
+<!ENTITY zopf             "%plane1D;56B;" ><!-- -->
diff --git a/dtd/modules.ent b/dtd/modules.ent
new file mode 100644
index 0000000..8458753
--- /dev/null
+++ b/dtd/modules.ent
@@ -0,0 +1,417 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Journal Article Module of Modules                 -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Module of Modules v2.0 20040830//EN"
+     Delivered as file "modules.ent"                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    For naming all the external modules (except       -->
+<!--             this module itself and the customization modules) -->
+<!--             that are part of the Archiving and Interchange DTD-->
+<!--             Suite modular DTD library. A specific DTD will    -->
+<!--             select from these modules by referencing the      -->
+<!--             external Parameter Entities defined below that    -->
+<!--             name the modules of the suite. To include a set   -->
+<!--             of elements (such as all the lists or the MathML  -->
+<!--             elements), reference the external Parameter Entity-->
+<!--             of the module that contains these declarations,   -->
+<!--             then modify the classes or content models to use  -->
+<!--             the new elements.                                 -->
+<!--                                                               -->
+<!-- CONTAINS:   1)  Entity declarations and public names for all  -->
+<!--                 the external modules. Note: The modules       -->
+<!--                 are NOT referenced (called/invoked) in this   -->
+<!--                 module, they are merely defined.  The DTD or  -->
+<!--                 a setup module (such as for the XHTML tables) -->
+<!--                 will invoke the external parameter entity to  -->
+<!--                 call the module.                              -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+=============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+=============================================================
+
+  4. Formal Public Identifer changed from
+        "...XML Special Characters Module v1.0 20021201//EN"
+     to the following
+        "...XML Special Characters Module v2.0 20040830//EN"
+
+     Formal Public Identifer changed from
+        "...Custom Special Characters Module v1.1 20031101//EN"
+     to the following
+        "...Custom Special Characters Module v2.0 20040830//EN"
+
+=============================================================
+
+  3. MODULE IDENTIFICATION
+     a. Updated public identifiers for ALL modules to match the
+        new 2.0 release. The most recent modules will be called.
+     b. As part of the remodularization, added new modules:
+          - default-classes.ent (to be over-ridden by DTD-specific
+                                 class definitions)
+          - default-mixes.ent   (to be over-ride en by DTD-specific
+                                 mix definitions)
+
+  2. Updated public identifier to "v2.0 20040830"         
+
+     =============================================================
+     Version 1.1                          (TRG) v1.1 (2003-11-01)
+
+  1. Updated public identifier for this modules and several modules 
+     to reflect modules' modification. 
+     Rationale: To call updated modules.                           -->
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULT CLASSES AND MIXES                  -->
+<!-- ============================================================= -->
+
+
+<!--                    DEFAULT ELEMENT CLASSES MODULE             -->
+<!--                    Set up the Parameter Entities and element
+                        class definitions that will be used to
+                        establish the content models for the 
+                        Archiving and Interchange DTD.             -->
+<!ENTITY % default-classes.ent
+                        PUBLIC  
+"-//NLM//DTD Default Element Classes Module v2.0 20040830//EN"
+"default-classes.ent"                                         >
+
+
+<!--                    DEFAULT ELEMENT MIXES MODULE               -->
+<!--                    Set up the Parameter Entities and element
+                        mix definitions that will be used in
+                        content models for the Archiving and 
+                        Interchange DTD.                           -->
+<!ENTITY % default-mixes.ent
+                        PUBLIC  
+"-//NLM//DTD Default Element Mixes Module v2.0 20040830//EN"
+"default-mixes.ent"                                                  >
+                                                                    
+
+<!-- ============================================================= -->
+<!--                    COMMON ELEMENTS SHARED BY MANY MODULES     -->
+<!-- ============================================================= -->
+
+
+<!--                    COMMON (SHARED) ELEMENT DECLARATIONS       -->
+<!ENTITY % common.ent
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Common (Shared) Elements Module v2.0 20040830//EN"
+"common.ent"                                                         >
+
+
+<!-- ============================================================= -->
+<!--                    CLASS MODULES (ALPHABETICAL ORDER)         -->
+<!-- ============================================================= -->
+
+
+<!--                    ARTICLE METADATA ELEMENTS                  -->
+<!ENTITY % articlemeta.ent
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Journal Article Metadata Elements v2.0 20040830//EN"
+"articlemeta.ent"                                                    >
+
+
+<!--                    BACK MATTER ELEMENTS                       -->
+<!ENTITY % backmatter.ent
+                        PUBLIC  
+"-//NLM//DTD Archiving and Interchange DTD Suite Back Matter Elements v2.0 20040830//EN"
+"backmatter.ent"                                                     >
+
+
+<!--                    DISPLAY (GRAPHICAL) ELEMENTS INVOCATION    -->
+<!ENTITY % display.ent
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Display Class Elements  v2.0 20040830//EN"
+"display.ent"                                                        >
+
+
+<!--                    FORMATTING ELEMENT CLASSES                 -->
+<!--                    Elements that change rendition/display. This
+                        module includes the Appearance Class, the
+                        Break Class, and the Emphasis Class        -->
+<!ENTITY % format.ent
+                        PUBLIC
+ "-//NLM//DTD Archiving and Interchange DTD Suite Formatting Element Classes v2.0 20040830//EN"
+"format.ent"                                                         >
+
+
+<!--                    JOURNAL METADATA ELEMENTS                  -->
+<!ENTITY % journalmeta.ent PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Journal Metadata Elements v2.0 20040830//EN"
+"journalmeta.ent"                                                          >
+
+
+<!--                    LINK ELEMENTS                              -->
+<!ENTITY % link.ent  PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Link Class Elements v2.0 20040830//EN"
+"link.ent"                                                           >
+
+
+<!--                    LIST ELEMENTS                              -->
+<!ENTITY % list.ent  PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite List Class Elements v2.0 20040830//EN"
+"list.ent"                                                           >
+
+
+<!--                    MATH ELEMENTS                              -->
+<!ENTITY % math.ent  PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Math Class Elements v2.0 20040830//EN"
+"math.ent"                                                           >
+
+
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!ENTITY % para.ent  PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Paragraph-Like Elements v2.0 20040830//EN"
+"para.ent"                                                           >
+
+
+<!--                    PHRASE-LEVEL CONTENT ELEMENTS              -->
+<!ENTITY % phrase.ent
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Subject Phrase Class Elements v2.0 20040830//EN"
+"phrase.ent"                                                         >
+
+
+<!--                    BIBLIOGRAPHY REFERENCES (CITATION) ELEMENTS-->
+<!ENTITY % references.ent     
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Bibliographic Reference (Citation) Class Elements v2.0 20040830//EN"
+"references.ent"                                                     >
+
+
+<!--                    SECTION ELEMENTS                           -->
+<!ENTITY % section.ent     
+                        PUBLIC  
+"-//NLM//DTD Archiving and Interchange DTD Suite Section Class Elements v2.0 20040830//EN"
+"section.ent"                                                        >
+
+
+<!-- ============================================================= -->
+<!--                    TABLES: XHTML TABLE MODULES                -->
+<!-- ============================================================= -->
+
+
+<!--                    XHTML TABLE SETUP MODULE                   -->
+<!--                    Set all Parameter Entities needed by the
+                        HTML 4.0 (XHTML) table model, and then
+                        call the module containing that model.                           
+                        Authoring Note: If wanted, this module
+                        will be invoked in the DTD module          -->
+<!ENTITY % XHTMLtablesetup.ent 
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite XHTML Table Setup Module v2.0 20040830//EN"
+"XHTMLtablesetup.ent"                                                >
+
+
+<!--                    XHTML TABLE MODEL                          -->
+<!--                    The public XML version of the HTML 4.0
+                        (XHTML) table model. This module is invoked
+                        in %XHTMLtablesetup.ent;                   -->
+<!ENTITY % htmltable.dtd 
+                        PUBLIC
+"-//W3C//ELEMENTS XHTML Tables 1.0//EN" 
+"htmltable.dtd"                                                      >
+
+
+<!-- ============================================================= -->
+<!--                    TABLES: OASIS EXCHANGE TABLE MODULES       -->
+<!-- ============================================================= -->
+
+
+<!--                    OASIS XML TABLE SETUP MODULE               -->
+<!--                    Set all Parameter Entities needed by the
+                        OASIS (CALS) Table Exchange table model, and 
+                        then call the module containing that model.                           
+                        Authoring Note: If wanted, this module
+                        will be invoked in the DTD module          -->
+<!ENTITY % oasis-tablesetup.ent 
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite OASIS XML Table Setup Module v1.2 20040830//EN"
+"oasis-tablesetup.ent"                                               >
+
+
+<!--                    OASIS XML TABLE MODEL                      -->
+<!--                    The OASIS (CALS) Table Exchange table model
+                        This module is invoked in 
+                        %OASIStablesetup.ent;                      -->
+<!ENTITY % oasis-exchange.ent 
+                        PUBLIC
+"-//OASIS//DTD XML Exchange Table Model 19990315//EN" 
+"oasis-exchange.ent"                                                 >
+
+
+<!-- ============================================================= -->
+<!--                    MATH: MATHML MODULES                       -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML SETUP MODULE                        -->
+<!--                    Called from the DTD to include the MathML
+                        elements in the tag set.                   -->
+<!ENTITY % mathmlsetup.ent 
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite MathML Setup Module v2.0 20040830//EN"
+"mathmlsetup.ent"                                                    >
+
+
+<!--                    MATHML 2.0 QUALIFIED NAMES                 -->
+<!ENTITY % mathml-qname.mod 
+                        PUBLIC
+"-//W3C//ENTITIES MathML 2.0 Qualified Names 1.0//EN" 
+"mathml/mathml2-qname-1.mod"                                         >
+
+
+<!--                    MATHML 2.0 DTD                             -->
+<!ENTITY % mathml.dtd   PUBLIC
+"-//W3C//DTD MathML 2.0//EN"
+"mathml2.dtd"                                                        >
+
+
+<!--                    MATHML 2.0 EXTRA ENTITIES                  -->
+<!ENTITY % ent-mmlextra 
+                        PUBLIC
+"-//W3C//ENTITIES Extra for MathML 2.0//EN" 
+"mathml/mmlextra.ent"                                                >
+
+
+<!--                    MATHML 2.0 ALIASES                         -->
+<!ENTITY % ent-mmlalias 
+                        PUBLIC
+"-//W3C//ENTITIES Aliases for MathML 2.0//EN" 
+"mathml/mmlalias.ent"                                                >
+
+
+<!-- ============================================================= -->
+<!--                    SPECIAL CHARACTER MODULES                  -->
+<!-- ============================================================= -->
+
+
+<!--                    SPECIAL CHARACTERS DECLARATIONS            -->
+<!--                    Declares any standard XML special character 
+                        entities used in this DTD                  -->
+<!ENTITY % xmlspecchars.ent   
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite XML Special Characters Module v2.0 20040830//EN"
+"xmlspecchars.ent"                                                   >
+
+
+<!--                    CUSTOM SPECIAL CHARACTERS DECLARATIONS     -->
+<!--                    Declares any custom special character 
+                        entities created for this Suite            -->
+ <!ENTITY % chars.ent PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite Custom Special Characters Module v2.0 20040830//EN"
+"chars.ent"                                                          > 
+
+
+<!-- ============================================================= -->
+<!--                     NOTATIONS MODULE                          -->
+<!-- ============================================================= -->
+
+
+<!--                    NOTATION DECLARATIONS MODULE               -->
+<!--                    Container module for the Notation Declarations
+                        to be used with this DTD suite.  Placed in
+                        their own module for easy expansion or
+                        replacement.                               -->
+<!ENTITY % notat.ent PUBLIC 
+"-//NLM//DTD Archiving and Interchange DTD Suite Notation Declarations v2.0 20040830//EN"
+"notat.ent"                                                          >
+
+
+<!-- =================== End Journal Article Module of Modules === -->
diff --git a/dtd/nlm-articleset-2.0.dtd b/dtd/nlm-articleset-2.0.dtd
new file mode 100644
index 0000000..dd9988b
--- /dev/null
+++ b/dtd/nlm-articleset-2.0.dtd
@@ -0,0 +1,1641 @@
+<!--
+4 Dec 2009: This DTD was written to accomodate multiple articles
+tagged in any version of the NLM Archiving and Interchange Tag
+Suite (http://dtd.nlm.nih.gov) and gathered in one pmc-articleset
+wrapper tag.
+
+Each individual article should be valid against a version of the Archiving
+DTD. The articles may not be valid against the same version. 
+
+February, 2012: Updated with NISO Z39.96 JATS elements and attributes
+through draft 1.0.
+-->
+
+<!--    Public document type definition. Typical invocation:
+<!DOCTYPE nlm-articleset PUBLIC "-//NLM//DTD ARTICLE SET 2.0//EN" 
+"http://dtd.nlm.nih.gov/ncbi/pmc/articleset/nlm-articleset-2.0.dtd">
+-->
+
+<!ENTITY % atts 		"
+abbr    CDATA    #IMPLIED
+abbrev-type    CDATA    #IMPLIED
+abstract-type    CDATA    #IMPLIED
+accent    CDATA    #IMPLIED
+accentunder    CDATA    #IMPLIED
+actiontype    CDATA    #IMPLIED
+align    CDATA    #IMPLIED
+alignmentscope    CDATA    #IMPLIED
+alt    CDATA    #IMPLIED
+alt-title-type    CDATA    #IMPLIED
+alt-version    CDATA    #IMPLIED
+alternate-form-of    CDATA    #IMPLIED
+altimg    CDATA    #IMPLIED
+altimg-height    CDATA    #IMPLIED
+altimg-valign    CDATA    #IMPLIED
+altimg-width    CDATA    #IMPLIED
+alttext    CDATA    #IMPLIED
+arrange    CDATA    #IMPLIED
+article-type    CDATA    #IMPLIED
+assigning-authority    CDATA    #IMPLIED
+authenticated   CDATA    #IMPLIED
+award-type    CDATA    #IMPLIED
+axis    CDATA    #IMPLIED
+baseline    CDATA    #IMPLIED
+baseline-shift    CDATA    #IMPLIED
+bevelled    CDATA    #IMPLIED
+border    CDATA    #IMPLIED
+calendar    CDATA    #IMPLIED
+cellpadding    CDATA    #IMPLIED
+cellspacing    CDATA    #IMPLIED
+char    CDATA    #IMPLIED
+charalign    CDATA    #IMPLIED
+charoff    CDATA    #IMPLIED
+citation-type    CDATA    #IMPLIED
+class    CDATA    #IMPLIED
+close    CDATA    #IMPLIED
+code-type    CDATA    #IMPLIED
+ccollab-type    CDATA    #IMPLIED
+color    CDATA    #IMPLIED
+colspan    CDATA    #IMPLIED
+columnalign    CDATA    #IMPLIED
+columnlines    CDATA    #IMPLIED
+columnspacing    CDATA    #IMPLIED
+columnspan    CDATA    #IMPLIED
+columnwidth    CDATA    #IMPLIED
+content-type    CDATA    #IMPLIED
+continued-from    CDATA    #IMPLIED
+contrib-id-type    CDATA    #IMPLIED
+contrib-type    CDATA    #IMPLIED
+corresp    CDATA    #IMPLIED
+count    CDATA    #IMPLIED
+count-type    CDATA    #IMPLIED
+country    CDATA    #IMPLIED
+crossout    CDATA    #IMPLIED
+currency    CDATA    #IMPLIED
+date-type    CDATA    #IMPLIED
+deceased    CDATA    #IMPLIED
+decimalpoint    CDATA    #IMPLIED
+denomalign    CDATA    #IMPLIED
+depth    CDATA    #IMPLIED
+description    CDATA    #IMPLIED
+designator    CDATA    #IMPLIED
+dir    CDATA    #IMPLIED
+disp-level    CDATA    #IMPLIED
+display    CDATA    #IMPLIED
+displaystyle    CDATA    #IMPLIED
+document-id    CDATA    #IMPLIED
+document-id-type    CDATA    #IMPLIED
+document-type    CDATA    #IMPLIED
+dtd-version    CDATA    #IMPLIED
+edge    CDATA    #IMPLIED
+elocation-id    CDATA    #IMPLIED
+equal-contrib    CDATA    #IMPLIED
+ext-link-type    CDATA    #IMPLIED
+fence    CDATA    #IMPLIED
+fig-type    CDATA    #IMPLIED
+fn-type    CDATA    #IMPLIED
+fontchar    CDATA    #IMPLIED
+fontname    CDATA    #IMPLIED
+form    CDATA    #IMPLIED
+format    CDATA    #IMPLIED
+frame    CDATA    #IMPLIED
+framespacing    CDATA    #IMPLIED
+glyph-data    CDATA    #IMPLIED
+groupalign    CDATA    #IMPLIED
+headers    CDATA    #IMPLIED
+height    CDATA    #IMPLIED
+href    CDATA    #IMPLIED
+id    CDATA    #IMPLIED
+indentalign    CDATA    #IMPLIED
+indentalignfirst    CDATA    #IMPLIED
+indentalignlast    CDATA    #IMPLIED
+indentshift    CDATA    #IMPLIED
+indentshiftfirst    CDATA    #IMPLIED
+indentshiftlast    CDATA    #IMPLIED
+indenttarget    CDATA    #IMPLIED
+infixlinebreakstyle    CDATA    #IMPLIED
+initials    CDATA    #IMPLIED
+institution-id-type    CDATA    #IMPLIED
+iso-8061-date    CDATA    #IMPLIED
+issue    CDATA    #IMPLIED
+journal-id    CDATA    #IMPLIED
+journal-id-type    CDATA    #IMPLIED
+kwd-group-type    CDATA    #IMPLIED
+largeop    CDATA    #IMPLIED
+length    CDATA    #IMPLIED
+license-type    CDATA    #IMPLIED
+linebreaking    CDATA    #IMPLIED
+linebreakmultchar    CDATA    #IMPLIED
+linebreakstyle    CDATA    #IMPLIED
+lineleading    CDATA    #IMPLIED
+linethickness    CDATA    #IMPLIED
+link-type    CDATA    #IMPLIED
+list-content    CDATA    #IMPLIED
+list-continued    CDATA    #IMPLIED
+list-type    CDATA    #IMPLIED
+location    CDATA    #IMPLIED
+longdivstyle    CDATA    #IMPLIED
+lspace    CDATA    #IMPLIED
+macros    CDATA    #IMPLIED
+mathbackground    CDATA    #IMPLIED
+mathcolor    CDATA    #IMPLIED
+mathsize    CDATA    #IMPLIED
+mathvariant    CDATA    #IMPLIED
+maxsize    CDATA    #IMPLIED
+mime-subtype    CDATA    #IMPLIED
+mimetype    CDATA    #IMPLIED
+minlabelspacing    CDATA    #IMPLIED
+minsize    CDATA    #IMPLIED
+mode    CDATA    #IMPLIED
+movablelimits    CDATA    #IMPLIED
+mstack    CDATA    #IMPLIED
+munder    CDATA    #IMPLIED
+name    CDATA    #IMPLIED
+name-style    CDATA    #IMPLIED
+notation    CDATA    #IMPLIED
+notes-type    CDATA    #IMPLIED
+numalign    CDATA    #IMPLIED
+object-id-type    CDATA    #IMPLIED
+object-type    CDATA    #IMPLIED
+open    CDATA    #IMPLIED
+orientation    CDATA    #IMPLIED
+other    CDATA    #IMPLIED
+overflow    CDATA    #IMPLIED
+page    CDATA    #IMPLIED
+page-sharing    CDATA    #IMPLIED
+person-group-type    CDATA    #IMPLIED
+position    CDATA    #IMPLIED
+prefix-word    CDATA    #IMPLIED
+preformat-type    CDATA    #IMPLIED
+product-type    CDATA    #IMPLIED
+pub-id-type    CDATA    #IMPLIED
+pub-type    CDATA    #IMPLIED
+publication-format    CDATA    #IMPLIED
+publication-type    CDATA    #IMPLIED
+publisher-type    CDATA    #IMPLIED
+rationale    CDATA    #IMPLIED
+ref-type    CDATA    #IMPLIED
+related-article-type    CDATA    #IMPLIED
+resolution    CDATA    #IMPLIED
+response-type    CDATA    #IMPLIED
+rid    CDATA    #IMPLIED
+rowalign    CDATA    #IMPLIED
+rowlines    CDATA    #IMPLIED
+rowspacing    CDATA    #IMPLIED
+rowspan    CDATA    #IMPLIED
+rspace    CDATA    #IMPLIED
+rules    CDATA    #IMPLIED
+scope    CDATA    #IMPLIED
+scriptlevel    CDATA    #IMPLIED
+scriptminsize    CDATA    #IMPLIED
+scriptsizemultiplier    CDATA    #IMPLIED
+sec-type    CDATA    #IMPLIED
+selection    CDATA    #IMPLIED
+separator    CDATA    #IMPLIED
+separators    CDATA    #IMPLIED
+seq    CDATA    #IMPLIED
+shift    CDATA    #IMPLIED
+source-id    CDATA    #IMPLIED
+source-id-type    CDATA    #IMPLIED
+source-type    CDATA    #IMPLIED
+span    CDATA    #IMPLIED
+specific-use    CDATA    #IMPLIED
+src    CDATA    #IMPLIED
+stackalign    CDATA    #IMPLIED
+stretchy    CDATA    #IMPLIED
+style    CDATA    #IMPLIED
+style-type    CDATA    #IMPLIED
+subj-group-type    CDATA    #IMPLIED
+summary    CDATA    #IMPLIED
+supplement-type    CDATA    #IMPLIED
+symbol    CDATA    #IMPLIED
+symmetric    CDATA    #IMPLIED
+target-type    CDATA    #IMPLIED
+type    CDATA    #IMPLIED
+underline-style    CDATA    #IMPLIED
+units    CDATA    #IMPLIED
+valign    CDATA    #IMPLIED
+version    CDATA    #IMPLIED
+voffset    CDATA    #IMPLIED
+vol    CDATA    #IMPLIED
+width    CDATA    #IMPLIED
+x-size    CDATA    #IMPLIED
+xlink:actuate    CDATA    #IMPLIED
+xlink:href    CDATA    #IMPLIED
+xlink:role    CDATA    #IMPLIED
+xlink:show    CDATA    #IMPLIED
+xlink:title    CDATA    #IMPLIED
+xlink:type    CDATA    #IMPLIED
+xml:base    CDATA    #IMPLIED
+xml:lang    CDATA    #IMPLIED
+xml:space    CDATA    #IMPLIED
+xmlns:ali    CDATA    #IMPLIED
+xmlns:mml    CDATA    #IMPLIED
+xmlns:xlink    CDATA    #IMPLIED
+xmlns:xsi    CDATA    #IMPLIED
+xref    CDATA    #IMPLIED
+xsi:schemaLocation    CDATA    #IMPLIED
+y-size    CDATA    #IMPLIED
+			">
+			
+<!ELEMENT pmc-articleset (article+) >
+<!ELEMENT nlm-articleset (article+) >
+
+<!ELEMENT abbrev	ANY >
+<!ATTLIST  abbrev	%atts; >
+		
+<!ELEMENT ali:free_to_read	ANY >
+<!ATTLIST  ali:free_to_read	%atts; >
+		
+<!ELEMENT ali:license_ref	ANY >
+<!ATTLIST  ali:license_ref	%atts; >
+		
+<!ELEMENT abbrev-journal-title	ANY >
+<!ATTLIST abbrev-journal-title	%atts; >
+		
+<!ELEMENT abstract	ANY >
+<!ATTLIST abstract	%atts; >
+		
+<!ELEMENT access-date	ANY >
+<!ATTLIST access-date	%atts; >
+		
+<!ELEMENT ack	ANY >
+<!ATTLIST ack	%atts; >
+		
+<!ELEMENT addr-line	ANY >
+<!ATTLIST addr-line	%atts; >
+		
+<!ELEMENT address	ANY >
+<!ATTLIST address	%atts; >
+		
+<!ELEMENT aff	ANY >
+<!ATTLIST aff	%atts; >
+		
+<!ELEMENT aff-alternatives	ANY >
+<!ATTLIST aff-alternatives	%atts; >
+		
+<!ELEMENT alt-text	ANY >
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+		
+<!ELEMENT mml:mn	ANY >
+<!ATTLIST mml:mn	%atts; >
+		
+<!ELEMENT mml:mo	ANY >
+<!ATTLIST mml:mo	%atts; >
+		
+<!ELEMENT mml:mode	ANY >
+<!ATTLIST mml:mode	%atts; >
+		
+<!ELEMENT mml:moment	ANY >
+<!ATTLIST mml:moment	%atts; >
+		
+<!ELEMENT mml:momentabout	ANY >
+<!ATTLIST mml:momentabout	%atts; >
+		
+<!ELEMENT mml:mover	ANY >
+<!ATTLIST mml:mover	%atts; >
+		
+<!ELEMENT mml:mpadded	ANY >
+<!ATTLIST mml:mpadded	%atts; >
+		
+<!ELEMENT mml:mphantom	ANY >
+<!ATTLIST mml:mphantom	%atts; >
+		
+<!ELEMENT mml:mprescripts	ANY >
+<!ATTLIST mml:mprescripts	%atts; >
+		
+<!ELEMENT mml:mroot	ANY >
+<!ATTLIST mml:mroot	%atts; >
+		
+<!ELEMENT mml:mrow	ANY >
+<!ATTLIST mml:mrow	%atts; >
+		
+<!ELEMENT mml:ms	ANY >
+<!ATTLIST mml:ms	%atts; >
+		
+<!ELEMENT mml:mspace	ANY >
+<!ATTLIST mml:mspace	%atts; >
+		
+<!ELEMENT mml:msqrt	ANY >
+<!ATTLIST mml:msqrt	%atts; >
+		
+<!ELEMENT mml:mstyle	ANY >
+<!ATTLIST mml:mstyle	%atts; >
+		
+<!ELEMENT mml:msub	ANY >
+<!ATTLIST mml:msub	%atts; >
+		
+<!ELEMENT mml:msubsup	ANY >
+<!ATTLIST mml:msubsup	%atts; >
+		
+<!ELEMENT mml:msup	ANY >
+<!ATTLIST mml:msup	%atts; >
+		
+<!ELEMENT mml:mtable	ANY >
+<!ATTLIST mml:mtable	%atts; >
+		
+<!ELEMENT mml:mtd	ANY >
+<!ATTLIST mml:mtd	%atts; >
+		
+<!ELEMENT mml:mtext	ANY >
+<!ATTLIST mml:mtext		%atts; >
+		
+<!ELEMENT mml:mtr	ANY >
+<!ATTLIST mml:mtr	%atts; >
+		
+<!ELEMENT mml:munder	ANY >
+<!ATTLIST mml:munder	%atts; >
+		
+<!ELEMENT mml:munderover	ANY >
+<!ATTLIST mml:munderover	%atts; >
+		
+<!ELEMENT mml:naturalnumbers	ANY >
+<!ATTLIST mml:naturalnumbers	%atts; >
+		
+<!ELEMENT mml:neq	ANY >
+<!ATTLIST mml:neq	%atts; >
+		
+<!ELEMENT mml:none	ANY >
+<!ATTLIST mml:none	%atts; >
+		
+<!ELEMENT mml:not	ANY >
+<!ATTLIST mml:not	%atts; >
+		
+<!ELEMENT mml:notanumber	ANY >
+<!ATTLIST mml:notanumber	%atts; >
+		
+<!ELEMENT mml:notin	ANY >
+<!ATTLIST mml:notin	%atts; >
+		
+<!ELEMENT mml:notprsubset	ANY >
+<!ATTLIST mml:notprsubset	%atts; >
+		
+<!ELEMENT mml:notsubset	ANY >
+<!ATTLIST mml:notsubset	%atts; >
+		
+<!ELEMENT mml:or	ANY >
+<!ATTLIST mml:or	%atts; >
+		
+<!ELEMENT mml:otherwise	ANY >
+<!ATTLIST mml:otherwise	%atts; >
+		
+<!ELEMENT mml:outerproduct	ANY >
+<!ATTLIST mml:outerproduct	%atts; >
+		
+<!ELEMENT mml:partialdiff	ANY >
+<!ATTLIST mml:partialdiff	%atts; >
+		
+<!ELEMENT mml:pi	ANY >
+<!ATTLIST mml:pi	%atts; >
+		
+<!ELEMENT mml:piece	ANY >
+<!ATTLIST mml:piece	%atts; >
+		
+<!ELEMENT mml:piecewise	ANY >
+<!ATTLIST mml:piecewise	%atts; >
+		
+<!ELEMENT mml:plus	ANY >
+<!ATTLIST mml:plus	%atts; >
+		
+<!ELEMENT mml:power	ANY >
+<!ATTLIST mml:power	%atts; >
+		
+<!ELEMENT mml:primes	ANY >
+<!ATTLIST mml:primes	%atts; >
+		
+<!ELEMENT mml:product	ANY >
+<!ATTLIST mml:product	%atts; >
+		
+<!ELEMENT mml:prsubset	ANY >
+<!ATTLIST mml:prsubset	%atts; >
+		
+<!ELEMENT mml:quotient	ANY >
+<!ATTLIST mml:quotient	%atts; >
+		
+<!ELEMENT mml:rationals	ANY >
+<!ATTLIST mml:rationals	%atts; >
+		
+<!ELEMENT mml:real	ANY >
+<!ATTLIST mml:real	%atts; >
+		
+<!ELEMENT mml:reals	ANY >
+<!ATTLIST mml:reals	%atts; >
+		
+<!ELEMENT mml:reln	ANY >
+<!ATTLIST mml:reln	%atts; >
+		
+<!ELEMENT mml:rem	ANY >
+<!ATTLIST mml:rem	%atts; >
+		
+<!ELEMENT mml:root	ANY >
+<!ATTLIST mml:root	%atts; >
+		
+<!ELEMENT mml:scalarproduct	ANY >
+<!ATTLIST mml:scalarproduct	%atts; >
+		
+<!ELEMENT mml:sdev	ANY >
+<!ATTLIST mml:sdev	%atts; >
+		
+<!ELEMENT mml:sec	ANY >
+<!ATTLIST mml:sec	%atts; >
+		
+<!ELEMENT mml:sech	ANY >
+<!ATTLIST mml:sech	%atts; >
+		
+<!ELEMENT mml:selector	ANY >
+<!ATTLIST mml:selector	%atts; >
+		
+<!ELEMENT mml:semantics	ANY >
+<!ATTLIST mml:semantics	%atts; >
+		
+<!ELEMENT mml:sep	ANY >
+<!ATTLIST mml:sep	%atts; >
+		
+<!ELEMENT mml:set	ANY >
+<!ATTLIST mml:set	%atts; >
+		
+<!ELEMENT mml:setdiff	ANY >
+<!ATTLIST mml:setdiff	%atts; >
+		
+<!ELEMENT mml:sin	ANY >
+<!ATTLIST mml:sin	%atts; >
+		
+<!ELEMENT mml:sinh	ANY >
+<!ATTLIST mml:sinh	%atts; >
+		
+<!ELEMENT mml:subset	ANY >
+<!ATTLIST mml:subset	%atts; >
+		
+<!ELEMENT mml:sum	ANY >
+<!ATTLIST mml:sum	%atts; >
+		
+<!ELEMENT mml:tan	ANY >
+<!ATTLIST mml:tan	%atts; >
+		
+<!ELEMENT mml:tanh	ANY >
+<!ATTLIST mml:tanh	%atts; >
+		
+<!ELEMENT mml:tendsto	ANY >
+<!ATTLIST mml:tendsto	%atts; >
+		
+<!ELEMENT mml:times	ANY >
+<!ATTLIST mml:times	%atts; >
+		
+<!ELEMENT mml:transpose	ANY >
+<!ATTLIST mml:transpose	%atts; >
+		
+<!ELEMENT mml:true	ANY >
+<!ATTLIST mml:true	%atts; >
+		
+<!ELEMENT mml:union	ANY >
+<!ATTLIST mml:union	%atts; >
+		
+<!ELEMENT mml:uplimit	ANY >
+<!ATTLIST mml:uplimit	%atts; >
+		
+<!ELEMENT mml:variance	ANY >
+<!ATTLIST mml:variance	%atts; >
+		
+<!ELEMENT mml:vector	ANY >
+<!ATTLIST mml:vector	%atts; >
+		
+<!ELEMENT mml:vectorproduct	ANY >
+<!ATTLIST mml:vectorproduct	%atts; >
+		
+<!ELEMENT mml:xor 	ANY >
+<!ATTLIST mml:xor	%atts; >
+				
+<!ELEMENT monospace	ANY >
+<!ATTLIST monospace	%atts; >
+		
+<!ELEMENT month	ANY >
+<!ATTLIST month	%atts; >
+		
+<!ELEMENT name	ANY >
+<!ATTLIST name	%atts; >
+		
+<!ELEMENT name-alternatives	ANY >
+<!ATTLIST name-alternatives	%atts; >
+		
+<!ELEMENT named-content	ANY >
+<!ATTLIST named-content	%atts; >
+		
+<!ELEMENT nested-kwd	ANY >
+<!ATTLIST nested-kwd	%atts; >
+		
+<!ELEMENT nlm-citation	ANY >
+<!ATTLIST nlm-citation	%atts; >
+		
+<!ELEMENT note	ANY >
+<!ATTLIST note	%atts; >
+		
+<!ELEMENT notes	ANY >
+<!ATTLIST notes	%atts; >
+		
+<!ELEMENT object-id	ANY >
+<!ATTLIST object-id	%atts; >
+		
+<!ELEMENT on-behalf-of	ANY >
+<!ATTLIST on-behalf-of	%atts; >
+		
+<!ELEMENT open-access	ANY >
+<!ATTLIST open-access	%atts; >
+		
+<!ELEMENT overline	ANY >
+<!ATTLIST overline	%atts; >
+		
+<!ELEMENT overline-end	ANY >
+<!ATTLIST overline-end	%atts; >
+		
+<!ELEMENT overline-start	ANY >
+<!ATTLIST overline-start	%atts; >
+		
+<!ELEMENT p	ANY >
+<!ATTLIST p	%atts; >
+		
+<!ELEMENT page-count	ANY >
+<!ATTLIST page-count	%atts; >
+		
+<!ELEMENT page-range	ANY >
+<!ATTLIST page-range	%atts; >
+		
+<!ELEMENT part-title	ANY >
+<!ATTLIST part-title	%atts; >
+		
+<!ELEMENT patent	ANY >
+<!ATTLIST patent	%atts; >
+		
+<!ELEMENT permissions	ANY >
+<!ATTLIST permissions	%atts; >
+		
+<!ELEMENT person-group	ANY >
+<!ATTLIST person-group	%atts; >
+		
+<!ELEMENT phone	ANY >
+<!ATTLIST phone	%atts; >
+		
+<!ELEMENT postal-code	ANY >
+<!ATTLIST postal-code	%atts; >
+		
+<!ELEMENT prefix	ANY >
+<!ATTLIST prefix	%atts; >
+		
+<!ELEMENT preformat	ANY >
+<!ATTLIST preformat	%atts; >
+		
+<!ELEMENT price	ANY >
+<!ATTLIST price	%atts; >
+		
+<!ELEMENT principal-award-recipient	ANY >
+<!ATTLIST principal-award-recipient	%atts; >
+		
+<!ELEMENT principal-investigator	ANY >
+<!ATTLIST principal-investigator	%atts; >
+		
+<!ELEMENT private-char	ANY >
+<!ATTLIST private-char	%atts; >
+		
+<!ELEMENT product	ANY >
+<!ATTLIST product	%atts; >
+		
+<!ELEMENT pub-date	ANY >
+<!ATTLIST pub-date	%atts; >
+		
+<!ELEMENT pub-id	ANY >
+<!ATTLIST pub-id	%atts; >
+		
+<!ELEMENT publisher	ANY >
+<!ATTLIST publisher	%atts; >
+		
+<!ELEMENT publisher-loc	ANY >
+<!ATTLIST publisher-loc	%atts; >
+		
+<!ELEMENT publisher-name	ANY >
+<!ATTLIST publisher-name	%atts; >
+		
+<!ELEMENT ref	ANY >
+<!ATTLIST ref	%atts; >
+		
+<!ELEMENT ref-count	ANY >
+<!ATTLIST ref-count	%atts; >
+		
+<!ELEMENT ref-list	ANY >
+<!ATTLIST ref-list	%atts; >
+		
+<!ELEMENT related-article	ANY >
+<!ATTLIST related-article	%atts; >
+		
+<!ELEMENT related-object	ANY >
+<!ATTLIST related-object	%atts; >
+		
+<!ELEMENT response	ANY >
+<!ATTLIST response	%atts; >
+		
+<!ELEMENT role	ANY >
+<!ATTLIST role	%atts; >
+		
+<!ELEMENT roman	ANY >
+<!ATTLIST roman	%atts; >
+		
+<!ELEMENT ruby	ANY >
+<!ATTLIST ruby	%atts; >
+
+<!ELEMENT rb	ANY >
+<!ATTLIST rb	%atts; >
+		
+<!ELEMENT rp	ANY >
+<!ATTLIST rp	%atts; >
+		
+<!ELEMENT rt	ANY >
+<!ATTLIST rt	%atts; >
+			
+<!ELEMENT sans-serif	ANY >
+<!ATTLIST sans-serif	%atts; >
+		
+<!ELEMENT sc	ANY >
+<!ATTLIST sc	%atts; >
+		
+<!ELEMENT season	ANY >
+<!ATTLIST season	%atts; >
+		
+<!ELEMENT sec	ANY >
+<!ATTLIST sec	%atts; >
+		
+<!ELEMENT sec-meta	ANY >
+<!ATTLIST sec-meta	%atts; >
+		
+<!ELEMENT self-uri	ANY >
+<!ATTLIST self-uri	%atts; >
+		
+<!ELEMENT series	ANY >
+<!ATTLIST series	%atts; >
+		
+<!ELEMENT series-text	ANY >
+<!ATTLIST series-text	%atts; >
+		
+<!ELEMENT series-title	ANY >
+<!ATTLIST series-title	%atts; >
+		
+<!ELEMENT sig	ANY >
+<!ATTLIST sig	%atts; >
+		
+<!ELEMENT sig-block	ANY >
+<!ATTLIST sig-block	%atts; >
+		
+<!ELEMENT size	ANY >
+<!ATTLIST size	%atts; >
+		
+<!ELEMENT source	ANY >
+<!ATTLIST source	%atts; >
+		
+<!ELEMENT source-subtitle	ANY >
+<!ATTLIST source-subtitle	%atts; >
+		
+<!ELEMENT speaker	ANY >
+<!ATTLIST speaker	%atts; >
+		
+<!ELEMENT speech	ANY >
+<!ATTLIST speech	%atts; >
+		
+<!ELEMENT state	ANY >
+<!ATTLIST state	%atts; >
+		
+<!ELEMENT statement	ANY >
+<!ATTLIST statement	%atts; >
+		
+<!ELEMENT std	ANY >
+<!ATTLIST std	%atts; >
+		
+<!ELEMENT std-organization	ANY >
+<!ATTLIST std-organization	%atts; >
+		
+<!ELEMENT strike	ANY >
+<!ATTLIST strike	%atts; >
+		
+<!ELEMENT string-conf	ANY >
+<!ATTLIST string-conf	%atts; >
+		
+<!ELEMENT string-date	ANY >
+<!ATTLIST string-date	%atts; >
+		
+<!ELEMENT string-kwd	ANY >
+<!ATTLIST string-kwd	%atts; >
+		
+<!ELEMENT string-name	ANY >
+<!ATTLIST string-name	%atts; >
+		
+<!ELEMENT styled-content	ANY >
+<!ATTLIST styled-content	%atts; >
+		
+<!ELEMENT sub	ANY >
+<!ATTLIST sub	%atts; >
+		
+<!ELEMENT sub-article	ANY >
+<!ATTLIST sub-article	%atts; >
+		
+<!ELEMENT subj-group	ANY >
+<!ATTLIST subj-group	%atts; >
+		
+<!ELEMENT subject	ANY >
+<!ATTLIST subject	%atts; >
+		
+<!ELEMENT subtitle	ANY >
+<!ATTLIST subtitle	%atts; >
+		
+<!ELEMENT suffix	ANY >
+<!ATTLIST suffix	%atts; >
+		
+<!ELEMENT sup	ANY >
+<!ATTLIST sup	%atts; >
+		
+<!ELEMENT supplement	ANY >
+<!ATTLIST supplement	%atts; >
+		
+<!ELEMENT supplementary-material	ANY >
+<!ATTLIST supplementary-material	%atts; >
+		
+<!ELEMENT surname	ANY >
+<!ATTLIST surname	%atts; >
+		
+<!ELEMENT table	ANY >
+<!ATTLIST table	%atts; >
+		
+<!ELEMENT table-count	ANY >
+<!ATTLIST table-count	%atts; >
+		
+<!ELEMENT table-wrap	ANY >
+<!ATTLIST table-wrap	%atts; >
+		
+<!ELEMENT table-wrap-foot	ANY >
+<!ATTLIST table-wrap-foot	%atts; >
+		
+<!ELEMENT table-wrap-group	ANY >
+<!ATTLIST table-wrap-group	%atts; >
+		
+<!ELEMENT target	ANY >
+<!ATTLIST target	%atts; >
+		
+<!ELEMENT tbody	ANY >
+<!ATTLIST tbody	%atts; >
+		
+<!ELEMENT td	ANY >
+<!ATTLIST td	%atts; >
+		
+<!ELEMENT term	ANY >
+<!ATTLIST term	%atts; >
+		
+<!ELEMENT term-head	ANY >
+<!ATTLIST term-head	%atts; >
+		
+<!ELEMENT tex-math	ANY >
+<!ATTLIST tex-math	%atts; >
+		
+<!ELEMENT textual-form	ANY >
+<!ATTLIST textual-form	%atts; >
+		
+<!ELEMENT tfoot	ANY >
+<!ATTLIST tfoot	%atts; >
+		
+<!ELEMENT th	ANY >
+<!ATTLIST th	%atts; >
+		
+<!ELEMENT thead	ANY >
+<!ATTLIST thead	%atts; >
+		
+<!ELEMENT time-stamp	ANY >
+<!ATTLIST time-stamp	%atts; >
+		
+<!ELEMENT title	ANY >
+<!ATTLIST title	%atts; >
+		
+<!ELEMENT title-group	ANY >
+<!ATTLIST title-group	%atts; >
+		
+<!ELEMENT tr	ANY >
+<!ATTLIST tr	%atts; >
+		
+<!ELEMENT trans-abstract	ANY >
+<!ATTLIST trans-abstract	%atts; >
+		
+<!ELEMENT trans-source	ANY >
+<!ATTLIST trans-source	%atts; >
+		
+<!ELEMENT trans-subtitle	ANY >
+<!ATTLIST trans-subtitle	%atts; >
+		
+<!ELEMENT trans-title	ANY >
+<!ATTLIST trans-title	%atts; >
+		
+<!ELEMENT trans-title-group	ANY >
+<!ATTLIST trans-title-group	%atts; >
+		
+<!ELEMENT underline	ANY >
+<!ATTLIST underline	%atts; >
+		
+<!ELEMENT underline-end	ANY >
+<!ATTLIST underline-end	%atts; >
+		
+<!ELEMENT underline-start	ANY >
+<!ATTLIST underline-start	%atts; >
+		
+<!ELEMENT unstructured-kwd-group	ANY >
+<!ATTLIST unstructured-kwd-group	%atts; >
+		
+<!ELEMENT uri	ANY >
+<!ATTLIST uri	%atts; >
+		
+<!ELEMENT verse-group	ANY >
+<!ATTLIST verse-group	%atts; >
+		
+<!ELEMENT verse-line	ANY >
+<!ATTLIST verse-line	%atts; >
+		
+<!ELEMENT version	ANY >
+<!ATTLIST version	%atts; >
+		
+<!ELEMENT volume	ANY >
+<!ATTLIST volume	%atts; >
+		
+<!ELEMENT volume-id	ANY >
+<!ATTLIST volume-id	%atts; >
+		
+<!ELEMENT volume-series	ANY >
+<!ATTLIST volume-series	%atts; >
+		
+<!ELEMENT word-count	ANY >
+<!ATTLIST word-count	%atts; >
+		
+<!ELEMENT x	ANY >
+<!ATTLIST x	%atts; >
+		
+<!ELEMENT xref	ANY >
+<!ATTLIST xref	%atts; >
+		
+<!ELEMENT year	ANY >
+<!ATTLIST year	%atts; >
+		
+<!ELEMENT zipcode	ANY >
+<!ATTLIST zipcode	%atts; >
+		
diff --git a/dtd/nlmcatalogrecordset_170601.dtd b/dtd/nlmcatalogrecordset_170601.dtd
new file mode 100644
index 0000000..02a1993
--- /dev/null
+++ b/dtd/nlmcatalogrecordset_170601.dtd
@@ -0,0 +1,280 @@
+<!--   NLMCatalogRecordSet DTD
+
+       Comments and suggestions are welcome.
+       June 1, 2017 
+
+        **THIS IS THE CURRENT DTD FOR 2017 CURRENTLY IN USE.**
+                            
+       This is the DTD which NLM has written for Internal and External Use. 
+       If you are a data Licensee, use the information
+       from the NLMCatalogRecordSet. 
+       
+    
+* = 0 or more occurrences (optional element, repeatable)
+? = 0 or 1 occurrences (optional element, at most 1)
++ = 1 or more occurrences (required element, repeatable)
+| = choice, one or the other but not both 
+no symbol = required element
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+  The following changes were made in the nlmcatalogrecordset_170101.dtd:
+  
+       a. Changed nlmcatalogrecordset_170101.dtd to nlmcatalogrecordset_170601.dtd.
+       b. Added URI attribute to MeshHeading to accommodate MeSH RDF URIs
+       
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmcatalogrecord.html  
+for historic Revision Notes for previous versions of NLMCatalogRecordSet DTD.
+-->
+<!-- ================================================================= -->
+<!ELEMENT NLMCatalogRecordSet (NLMCatalogRecord+, DeleteCatalogRecord?)>
+<!ELEMENT NLMCatalogRecord (NlmUniqueID, DateCreated, DateRevised, DateAuthorized?, 
+          DateCompleted?, DateRevisedMajor?, CollaborativePartnerDate*, TitleMain, 
+          MedlineTA?,TitleAlternate*, TitleRelated*, AuthorList?, InvestigatorList?, ResourceInfo,
+          ResourceCharacteristics*, PublicationTypeList?, GenreList?, PublicationInfo,
+          Language*, PhysicalDescription?, Abstract?, 
+          OtherAbstract*, ContentsNote*, IndexingSourceList?, 
+          GeneralNote*, LocalNote*, PersonalNameSubjectList?, MeshHeadingList?, 
+          OtherSubjectList*, SpaceFlightMission*, KeywordList*, 
+          BroadJournalHeadingList?, Classification*, 
+          GovDocClassNumber*, ELocationList?, Host*, LCCN*, ISBN*, ISSN*, 
+          ISSNLinking*, NCBIIssnAlias*, STRN*, Coden*, OtherID*, 
+          AcquisitionInfoList?, ReportNumber*)>
+<!ATTLIST NLMCatalogRecord
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM | 
+               NOTNLM | NYA | PIP | Undetermined) "Undetermined"
+	Status (Brief | Cataloging-In-Publication | Completed | In-Process |
+                Not-Our-Cataloging | On-Order | Undetermined | Withdrawn) #REQUIRED>
+<!ELEMENT Abstract (AbstractText)>
+<!ELEMENT AbstractText (#PCDATA)>
+<!ELEMENT AcquisitionInfo (StockNumber?, AcquisitionSource?)>
+<!ELEMENT AcquisitionInfoList (AcquisitionInfo+)>
+<!ELEMENT AcquisitionSource (#PCDATA)>
+<!ELEMENT Affiliation (#PCDATA)>
+<!ELEMENT Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName),
+                    Affiliation?, DatesAssociatedWithName?, Identifier*,
+                    NameQualifier?, OtherInformation?, TitleAssociatedWithName?,Role*)>
+<!ELEMENT AuthorList (Author+)>
+<!ATTLIST AuthorList
+	CompleteYN (Y | N) "Y">
+<!ELEMENT BookFormat (#PCDATA)>
+<!ELEMENT BroadJournalHeading (#PCDATA)>
+<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
+<!ELEMENT CarrierType (#PCDATA)>
+<!ELEMENT ChapterPgn (#PCDATA)>
+<!ELEMENT Classification (#PCDATA)>
+<!ATTLIST Classification
+	NLMCallNumberYN (Y | N) "Y"
+	Authority (KIE | MARC | NLM | Other | Undetermined) "Undetermined"
+	CallNumberType (NLMClass | Other | ShelvingNumber) "Other">
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT CollaborativePartnerDate (#PCDATA)>
+<!ATTLIST CollaborativePartnerDate
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM | NOTNLM | 
+               NYA | PIP | Undetermined) "Undetermined"
+	CollaborativeStatus (Create | In-House-Review | Other | 
+                             Released | Review) "Other">
+<!ELEMENT CollectiveName (#PCDATA)>
+<!ELEMENT ContentsNote (#PCDATA)>
+<!ELEMENT ContentType (#PCDATA)>
+<!ELEMENT CopyrightDate (#PCDATA)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT Coverage (#PCDATA)>
+<!ELEMENT DateAuthorized (Year, Month, Day)>
+<!ELEMENT DateCompleted (Year, Month, Day)>
+<!ELEMENT DateCreated (Year, Month, Day)>
+<!ELEMENT DateIssued (#PCDATA)>
+<!ELEMENT DateRevised (Year, Month, Day)>
+<!ELEMENT DateRevisedMajor (Year, Month, Day)>
+<!ELEMENT DatesAssociatedWithName (#PCDATA)>
+<!ELEMENT DatesOfSerialPublication (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+<!ELEMENT DescriptiveInformation (#PCDATA)>
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N"
+            Type (Geographic) #IMPLIED
+            UI  CDATA #IMPLIED>
+<!ELEMENT Edition (#PCDATA)>
+<!ELEMENT ELocation ((ELocationID, DescriptiveInformation?) | 
+                      DescriptiveInformation)>
+<!ELEMENT ELocationID (#PCDATA)>
+<!ATTLIST ELocationID
+	EIdType (url) #REQUIRED
+	ValidYN (Y | N) "Y">
+<!ELEMENT ELocationList (ELocation+)>
+<!ELEMENT Entity (#PCDATA)>
+<!ELEMENT Extent (#PCDATA)>
+<!ELEMENT ForeName (#PCDATA)>
+<!ELEMENT Form (#PCDATA)>
+<!ELEMENT Frequency (#PCDATA)>
+<!ATTLIST Frequency
+	FrequencyType (Current | Former) "Current">
+<!ELEMENT GeneralNote (#PCDATA)>
+<!ATTLIST GeneralNote
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM | NOTNLM | 
+               NYA | PIP | Undetermined) "Undetermined"
+	NoteType (Binding | Biography | BoundWith |CiteAs | Dissertation |
+                  FindingAid | LinkComplexNote | Provenance |
+                  ProvHistory | Restriction | CopyrightStatus | 
+                  CopyrightHolder) #IMPLIED>
+<!ELEMENT Generation (#PCDATA)>
+<!ELEMENT Genre (#PCDATA)>
+<!ELEMENT GenreList (Genre+)>
+<!ELEMENT GovDocClassNumber (#PCDATA)>
+<!ATTLIST GovDocClassNumber
+	ValidYN (Y | N) "Y">
+<!ELEMENT Host (#PCDATA)>
+<!ELEMENT Identifier (#PCDATA)>
+<!ATTLIST Identifier 
+          Source CDATA #IMPLIED>
+<!ELEMENT Imprint (Place*, Entity*, DateIssued*, ImprintFull)>
+<!ATTLIST Imprint
+	ImprintType (Current | Original) #REQUIRED
+        FunctionType (UnpublishedProduction | Publication | Distribution | 
+                      Manufacture) #REQUIRED>
+<!ELEMENT ImprintFull (#PCDATA)>
+<!ELEMENT IndexingSource (IndexingSourceName, Coverage?)>
+<!ELEMENT IndexingSourceList (IndexingSource+)>
+<!ELEMENT IndexingSourceName (#PCDATA)>
+<!ATTLIST IndexingSourceName
+	IndexingTreatment (Unknown | Full | Selective | ReferencedIn |
+                     ReferencedInNoDetails) #IMPLIED
+	IndexingStatus (Ceased-publication | Continued-by-another-title | 
+                     Currently-indexed | Deselected) #IMPLIED>
+<!ELEMENT Initials (#PCDATA)>
+<!ELEMENT Investigator (LastName, ForeName?, Initials?, Suffix?, Affiliation?)>
+<!ATTLIST Investigator
+	ValidYN (Y | N) "Y">
+<!ELEMENT InvestigatorList (Investigator+)>
+<!ELEMENT ISBN (#PCDATA)>
+<!ATTLIST ISBN
+	ValidYN (Y | N) "Y">
+<!ELEMENT ISSN (#PCDATA)>
+<!ATTLIST ISSN
+	IssnType (Electronic | Print | Undetermined) #REQUIRED
+	ValidYN (Y | N) "Y">
+<!ELEMENT ISSNLinking (#PCDATA)>
+<!ATTLIST ISSNLinking
+	ValidYN (Y | N) "Y">
+<!ELEMENT Issuance (#PCDATA)>
+<!ELEMENT Keyword (#PCDATA)>
+<!ATTLIST Keyword
+	MajorTopicYN (Y | N) "N">
+<!ELEMENT KeywordList (Keyword+)>
+<!ATTLIST KeywordList
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM |
+               NOTNLM | NYA | PIP | Undetermined) "NLM">
+<!ELEMENT Language (#PCDATA)>
+<!ATTLIST Language
+	LangType (Primary | Original | Summary | TableOfContents | Captions) #REQUIRED>
+<!ELEMENT LastName (#PCDATA)>
+<!ELEMENT LCCN (#PCDATA)>
+<!ATTLIST LCCN
+	ValidYN (Y | N) "Y">
+<!ELEMENT LocalNote (#PCDATA)>
+<!ATTLIST LocalNote
+	LocalNoteType (DashedOn | Other | PreservationAction) "Other">
+<!ELEMENT MaterialSpecified (#PCDATA)>
+<!ELEMENT MediaType (#PCDATA)>
+<!-- NOTE: The use of "Medline" in the MedlineTA element name does not mean the data 
+     represents a Medline-selected journal.  -->
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
+<!ATTLIST MeshHeading 
+            URI CDATA #IMPLIED>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT NameQualifier (#PCDATA)>
+<!ELEMENT NCBIIssnAlias (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
+<!ELEMENT OtherAbstract (AbstractText)>
+<!ATTLIST OtherAbstract
+	Type (AAMC | HMD | HSR | KIE | NASA | NCBI | NLM | NTIS |
+              NYA | PIP | Producer | Undetermined) #REQUIRED>
+<!ELEMENT OtherID (#PCDATA)>
+<!ATTLIST OtherID
+	Prefix CDATA #IMPLIED
+	Source (CIT | HMD | HSR | IDM | IHM | KIE | NASA | NLM | 
+                NYA | OCLC | PIP | Undetermined) #REQUIRED>
+<!ELEMENT OtherInformation (#PCDATA)>
+<!ELEMENT OtherSubject (OtherSubjectName, OtherInformation?, TitleAssociatedWithName?)>
+<!ELEMENT OtherSubjectList (OtherSubject+)>
+<!ATTLIST OtherSubjectList
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM | 
+               NOTNLM | NYA | PIP | Undetermined) "Undetermined">
+<!ELEMENT OtherSubjectName (#PCDATA)>
+<!ATTLIST OtherSubjectName
+	MajorTopicYN (Y | N) "N"
+	SubjectType (CorpName | Title | Other) #REQUIRED>
+<!ELEMENT PersonalNameSubject ((LastName, ForeName?, Initials?, Suffix?), 
+          DatesAssociatedWithName?, NameQualifier?, OtherInformation?, 
+          TitleAssociatedWithName?)>
+<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT PhysicalDescription (Form*, Extent*, Runtime?, Generation*, 
+                               BookFormat*, Polarity*, ChapterPgn?)>
+<!ELEMENT Place (#PCDATA)>
+<!ELEMENT PlaceCode (#PCDATA)>
+<!ATTLIST PlaceCode
+	Authority (KIE | MARC | NLM | Other | Undetermined) "Undetermined">
+<!ELEMENT Polarity (#PCDATA)>
+<!ELEMENT ProjectedPublicationDate (#PCDATA)>
+<!ELEMENT PublicationEndYear (#PCDATA)>
+<!ELEMENT PublicationFirstYear (#PCDATA)>
+<!ELEMENT PublicationInfo (Country?, PlaceCode?, Imprint*,  
+                           ProjectedPublicationDate?, CopyrightDate?,
+                           PublicationFirstYear?, PublicationEndYear?, Edition?,
+                           DatesOfSerialPublication*, Frequency*)>
+<!ELEMENT PublicationType (#PCDATA)>
+<!ATTLIST PublicationType
+	UI  CDATA #IMPLIED>
+<!ELEMENT PublicationTypeList (PublicationType+)>
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N"
+	UI  CDATA #IMPLIED>
+<!ELEMENT RecordID (#PCDATA)>
+<!ATTLIST RecordID
+	Source (NLM | LC | OCLC) #REQUIRED>
+<!ELEMENT ReportNumber (#PCDATA)>
+<!ATTLIST ReportNumber
+	ValidYN (Y | N) "Y">
+<!ELEMENT Resource (ContentType*, MediaType*, CarrierType*)>
+<!ELEMENT ResourceCharacteristics (#PCDATA)>
+<!ATTLIST ResourceCharacteristics
+          Format (Sound | Video | ProjectedMovingImage | DigitalFile) #REQUIRED>
+<!ELEMENT ResourceInfo (TypeOfResource, Issuance, ResourceUnit*, Resource*)>
+<!ELEMENT ResourceUnit (#PCDATA)>
+<!ELEMENT Role (#PCDATA)>
+<!ATTLIST Role
+          CodedYN (Y | N) #REQUIRED>
+<!ELEMENT Runtime (#PCDATA)>
+<!ELEMENT SpaceFlightMission (#PCDATA)>
+<!ELEMENT StockNumber (#PCDATA)>
+<!ELEMENT STRN (#PCDATA)>
+<!ELEMENT Suffix (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ATTLIST Title
+	Sort (0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | N) #REQUIRED>
+<!ELEMENT TitleAlternate (Title, MaterialSpecified?, OtherInformation?)>
+<!ATTLIST TitleAlternate
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM |
+               NOTNLM | NYA | PIP | Undetermined) "Undetermined"
+	TitleType (Former | Key |  Other | OtherTA | Translated | 
+	   Undetermined | Uniform) "Undetermined">
+<!ELEMENT TitleAssociatedWithName (#PCDATA)>
+<!ELEMENT TitleMain (Title, OtherInformation?)>
+<!ELEMENT TitleRelated (Title, OtherInformation?, RecordID*, ISSN?)>
+<!ATTLIST TitleRelated
+	Owner (CIT | HMD | HSR | IHM | KIE | NASA | NCBI | NLM |
+               NOTNLM | NYA | PIP | Undetermined) "Undetermined"
+	TitleType (Absorbed | AbsorbedBy | AbsorbedInPart | AbsorbedInPartBy | 
+                   Analytic | MergedTo | MergerOf | Other | Preceding | PrecedingInPart | 
+                   Related | Reversion | Series | SeriesAuthority | SplitFrom | SplitTo | Succeeding |
+                   SucceedingInPart | SupersededBy | SupersededInPartBy | 
+                   Supersedes | SupersedesInPart | Translated | Undetermined) "Undetermined">
+<!ELEMENT TypeOfResource (#PCDATA)>
+<!ELEMENT Year (#PCDATA)>
+<!ELEMENT DeleteCatalogRecord (NlmUniqueID+)>
diff --git a/dtd/nlmcommon_011101.dtd b/dtd/nlmcommon_011101.dtd
new file mode 100644
index 0000000..a092651
--- /dev/null
+++ b/dtd/nlmcommon_011101.dtd
@@ -0,0 +1,175 @@
+<!-- NLMCommon DTD
+      
+     This is the DTD for data elements that are shared 
+     among various applications at the NLM. 
+     Comments and suggestions are welcome.
+
+     November 1, 2001
+
+   
+
+    
+-->
+<!--    NLMCommon.dtd
+
+        Document Type Definition for the PubMed Article DTD
+        $Id: nlmcommon_011101.dtd 33908 2004-02-05 16:23:37Z yasmax $
+
+       
+-->
+<!-- ====================================================================== -->
+<!--   Revision Notes Section
+
+ The following changes were made in the nlmcommon_011101.dtd:
+
+       a.  Added DescriptorName to MeshHeading field.
+
+       b.  Added QualifierName to SubHeading field.
+
+       c.  Added attribute for DescriptorName.
+
+       d.  Added attribute for QualifierName.
+
+       e.  Added ForeName to personal name field.  
+        
+ The following changes were made in the nlmcommon_010319.dtd:
+
+       a.  Added Entity % Abstract to dtd.
+
+       b.  Element Abstract now links to % Abstract.
+
+       c.  Moved element definition of AbstractText & Copyright 
+           Information to nlmcommon_0010319.dtd. They were previously 
+           defined in nlmmedlinecitation.dtd.
+
+       d.  Made Country and MedlineCode optional elements.
+
+       e.  Element Grant now links to %GrantID.Ref, %Agency.Ref &
+           %Acronym.Ref.
+
+ The following change was made in the nlmcommon_001211.dtd:
+
+       a. addition of NLMUniqueID to the DTD.
+
+-->
+<!-- Personal and Author names -->
+<!ENTITY % personal.name "(LastName,(ForeName|(FirstName,MiddleName?))?,Initials?,Suffix?)">  
+<!ENTITY % author.name "(%personal.name; | CollectiveName)">
+<!ELEMENT FirstName (#PCDATA)>
+<!ELEMENT ForeName (#PCDATA)>
+<!ELEMENT MiddleName (#PCDATA)>
+<!ELEMENT LastName (#PCDATA)>
+<!ELEMENT Initials (#PCDATA)>
+<!ELEMENT Suffix (#PCDATA)>
+<!ELEMENT CollectiveName (#PCDATA)>
+<!-- Dates -->
+<!ENTITY % normal.date "(Year,Month,Day,(Hour,(Minute,Second?)?)?)">
+<!ENTITY % pub.date "((Year, ((Month, Day?) | Season)?) | MedlineDate)">
+<!ELEMENT Year (#PCDATA)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+<!ELEMENT Season (#PCDATA)>
+<!ELEMENT MedlineDate (#PCDATA)>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+<!ENTITY % data.template "#PCDATA">
+<!ENTITY % Abstract "(AbstractText,CopyrightInformation?)" >
+<!ELEMENT AbstractText (#PCDATA)>
+<!ELEMENT CopyrightInformation (#PCDATA)>
+
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- This is the top level element for NCBIArticle -->
+<!ELEMENT NCBIArticle (PMID, Article, MedlineJournalInfo?)>
+<!-- ================================================================= -->
+<!-- This is the top level element for Article -->
+<!ELEMENT Article ((Journal | Book),
+                    %ArticleTitle.Ref;,
+                    Pagination, 
+                    Abstract?,
+                    Affiliation?,
+                    AuthorList?,
+                    Language+, 
+                    DataBankList?, 
+                    GrantList?,
+                    PublicationTypeList,
+                    VernacularTitle?,
+                    DateOfElectronicPublication?)>
+<!ELEMENT DataBankList (DataBank+)>
+<!ELEMENT DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT DataBankName (#PCDATA)>
+<!ELEMENT AccessionNumberList (AccessionNumber+)>
+<!ELEMENT AccessionNumber (#PCDATA)>
+<!ATTLIST DataBankList
+	CompleteYN (Y | N) "Y">
+<!ELEMENT GrantList (Grant+)>
+<!ELEMENT Grant (%GrantID.Ref;, %Acronym.Ref;, %Agency.Ref;)>
+<!ELEMENT GrantID (#PCDATA)>
+<!ELEMENT Acronym (#PCDATA)>
+<!ELEMENT Agency (#PCDATA)>
+<!ELEMENT Abstract (%Abstract;)>
+<!ATTLIST GrantList
+	CompleteYN (Y | N) "Y">
+<!ELEMENT Journal (%ISSN.Ref;, 
+                   JournalIssue,
+                   Coden?,
+                   Title?,
+                   ISOAbbreviation?)>
+<!ELEMENT ISSN (#PCDATA)>
+<!ELEMENT JournalIssue (Volume?, Issue?, %PubDate.Ref;)>
+<!ELEMENT Volume (#PCDATA)>
+<!ELEMENT Issue (#PCDATA)>
+<!ELEMENT PubDate (%pub.date;)>
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ELEMENT ISOAbbreviation (#PCDATA)>
+<!ELEMENT DateOfElectronicPublication (#PCDATA)>
+<!ELEMENT MedlineJournalInfo (Country?,
+                              MedlineTA,
+                              MedlineCode?,
+                              NlmUniqueID?)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MedlineCode (#PCDATA)>
+<!-- Sometime in the future, MedlineCode will change to
+     NLMUniqueID   -->
+<!ELEMENT Book (%PubDate.Ref;,
+                 Publisher,
+                 Title,
+                 AuthorList?,
+                 CollectionTitle?,
+                 Volume?)>
+<!ELEMENT Publisher (#PCDATA)>
+<!ELEMENT ArticleTitle (#PCDATA)>
+<!ELEMENT CollectionTitle (#PCDATA)>
+<!ELEMENT VernacularTitle (#PCDATA)>
+<!ELEMENT PublicationTypeList (PublicationType+)>
+<!ELEMENT PublicationType (#PCDATA)>
+<!ELEMENT Language (#PCDATA)>
+<!ELEMENT AuthorList (Author+)>
+<!ELEMENT Author ((%author.name;), Affiliation?)>
+<!ELEMENT Affiliation (#PCDATA)>
+<!ATTLIST AuthorList
+	CompleteYN (Y | N) "Y">
+<!ELEMENT Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT StartPage (#PCDATA)>
+<!ELEMENT EndPage (#PCDATA)>
+<!ELEMENT MedlinePgn (#PCDATA)>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT MeshHeading ((DescriptorName | Descriptor),
+                        (QualifierName* | SubHeading*))>
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N" >
+<!ELEMENT Descriptor (#PCDATA)>
+<!ATTLIST Descriptor
+	MajorTopicYN (Y | N) "N">
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N">
+<!ELEMENT SubHeading (#PCDATA)>
+<!ATTLIST SubHeading
+	MajorTopicYN (Y | N) "N">
+<!ELEMENT PMID (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
diff --git a/dtd/nlmcommon_060101.dtd b/dtd/nlmcommon_060101.dtd
new file mode 100644
index 0000000..61ae1b6
--- /dev/null
+++ b/dtd/nlmcommon_060101.dtd
@@ -0,0 +1,195 @@
+<!-- NLMCommon DTD
+
+     Comments and suggestions are welcome.
+     January 1, 2006
+     
+     **See http://www.nlm.nih.gov/databases/dtd/nlmcommon_070101.dtd for the forthcoming 
+     NLMCommon DTD dated January 1, 2007 for future use.**
+
+     This is the DTD for data elements that are shared 
+     among various applications at the U.S. National Library of Medicine. 
+ 
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!--    NLMCommon.dtd
+
+        Document Type Definition for the PubMed Article DTD
+        $Id: nlmcommon_060101.dtd,v 1.1 2007-06-01 05:44:04 alexs Exp $
+   
+-->
+<!-- ====================================================================== -->
+<!--   Revision Notes Section
+
+
+ The following changes were made in the nlmcommon_060101.dtd:
+
+      a.  Added attribute CitedMedium to JournalIssue element
+ 
+      b.  Added attribute IssnType to ISSN element
+
+      c.  Added IndexingTreatment entity
+ 
+      d.  Replaced PublicationTypeList with PublicationType entity reference in 
+          Article element
+      
+     Historic Revision notes for previous versions of NLMCommon DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmcommon.html
+-->
+<!-- ================================================================= -->
+<!--     internal DTD entities             -->   
+<!ENTITY % Abstract "(AbstractText,CopyrightInformation?)">
+<!ENTITY % personal.name "(LastName,(ForeName|(FirstName,MiddleName?))?,
+                           Initials?,Suffix?)">
+<!ENTITY % author.name "(%personal.name; | CollectiveName)">
+<!ENTITY % data.template "#PCDATA">
+<!ENTITY % ImprintType "(Current | Original)">
+<!ENTITY % IndexingStatus "(Ceased-publication |  Continued-by-another-indexed-title | 
+                            Currently-indexed |  Currently-indexed-Title-changed |
+                            Date-range-of-indexed-citations-unspecified | 
+                            Deselected) #IMPLIED">
+<!ENTITY % IndexingTreatment "(Unknown | Full | Selective | ReferencedIn | 
+                               ReferencedInNoDetails) #IMPLIED">
+<!ENTITY % normal.date "(Year,Month,Day,(Hour,(Minute,Second?)?)?)">
+<!ENTITY % pub.date "((Year, ((Month, Day?) | Season)?) | MedlineDate)">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- This is the top level element for NCBIArticle -->
+<!ELEMENT NCBIArticle (PMID, Article, MedlineJournalInfo?)>
+<!-- ================================================================= -->
+<!-- This is the top level element for Article -->
+<!ELEMENT Article ((Journal | Book), %ArticleTitle.Ref;, Pagination, Abstract?,
+                    Affiliation?, AuthorList?, Language+, DataBankList?, 
+                    GrantList?, %PublicationType.Ref;, VernacularTitle?,
+                    ArticleDate*)>
+<!-- ================================================================= -->
+<!--  Further Definitions of NLM Tags                                  -->
+<!ELEMENT Abstract (%Abstract;)>
+<!ELEMENT AbstractText (#PCDATA)>
+<!ELEMENT AccessionNumber (#PCDATA)>
+<!ELEMENT AccessionNumberList (AccessionNumber+)>
+<!ELEMENT Acronym (#PCDATA)>
+<!ELEMENT Affiliation (#PCDATA)>
+<!ELEMENT Agency (#PCDATA)>
+<!ELEMENT ArticleDate (%normal.date;)>
+<!ATTLIST ArticleDate
+          DateType CDATA  #FIXED "Electronic">
+<!ELEMENT ArticleTitle (#PCDATA)>
+<!ELEMENT Author ((%author.name;), Affiliation?,DatesAssociatedWithName?,
+                 NameQualifier?,OtherInformation?,TitleAssociatedWithName?)>
+<!ATTLIST Author
+	ValidYN (Y | N) "Y"
+>
+<!ELEMENT AuthorList (Author+)>
+<!ATTLIST AuthorList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Book (%PubDate.Ref;, Publisher, Title, AuthorList?,
+                CollectionTitle?, Volume?)>
+<!ELEMENT BroadJournalHeading (#PCDATA)>
+<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT CollectionTitle (#PCDATA)>
+<!ELEMENT CollectiveName (#PCDATA)>
+<!ELEMENT CopyrightInformation (#PCDATA)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT Coverage  (#PCDATA)>
+<!ELEMENT DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT DataBankList (DataBank+)>
+<!ATTLIST DataBankList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT DataBankName (#PCDATA)>
+<!ELEMENT DateIssued (#PCDATA)>
+<!ELEMENT DatesAssociatedWithName (#PCDATA)>
+<!ELEMENT DatesOfSerialPublication (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Edition (#PCDATA)>
+<!ELEMENT EndPage (#PCDATA)>
+<!ELEMENT FirstName (#PCDATA)>
+<!ELEMENT ForeName (#PCDATA)>
+<!ELEMENT Frequency (#PCDATA)>
+<!ATTLIST Frequency 
+          FrequencyType (Current | Former) "Current"
+>
+<!ELEMENT Grant (%GrantID.Ref;, %Acronym.Ref;, %Agency.Ref;)>
+<!ELEMENT GrantID (#PCDATA)>
+<!ELEMENT GrantList (Grant+)>
+<!ATTLIST GrantList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Imprint (#PCDATA)>
+<!ELEMENT Initials (#PCDATA)>
+<!ELEMENT ISOAbbreviation (#PCDATA)>
+<!ELEMENT ISSN (#PCDATA)>
+<!ATTLIST ISSN
+	  IssnType  (Electronic | Print | Undetermined) #REQUIRED
+>
+<!ELEMENT Issue (#PCDATA)>
+<!ELEMENT Journal (%ISSN.Ref;, JournalIssue, Coden?, Title?, ISOAbbreviation?)>
+<!ELEMENT JournalIssue (Volume?, Issue?, %PubDate.Ref;)>
+<!ATTLIST JournalIssue
+	CitedMedium (Internet | Print) #REQUIRED
+>
+<!ELEMENT Language (#PCDATA)>
+<!ELEMENT LastName (#PCDATA)>
+<!ELEMENT MedlineDate (#PCDATA)>
+<!ELEMENT MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?)>
+<!ELEMENT MedlinePgn (#PCDATA)>
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT MiddleName (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT NameQualifier (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
+<!ELEMENT OtherInformation (#PCDATA)>
+<!ELEMENT Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT Place (#PCDATA)>
+<!ATTLIST Place  
+       ImprintType %ImprintType; "Current"
+>
+<!ELEMENT PlaceCode (#PCDATA)>
+<!ELEMENT PMID (#PCDATA)>
+<!ELEMENT ProjectedPublicationDate (#PCDATA)>
+<!ELEMENT PubDate (%pub.date;)>
+<!ELEMENT PublicationEndYear (#PCDATA)>
+<!ELEMENT PublicationFirstYear (#PCDATA)>
+<!ELEMENT PublicationInfo (Country?, PlaceCode?, Imprint*, Place*, 
+                           Publisher*, DateIssued*,  ProjectedPublicationDate?,
+                           PublicationFirstYear?, PublicationEndYear?, Edition?,
+                           DatesOfSerialPublication*, Frequency*)>
+<!ELEMENT PublicationType (#PCDATA)>
+<!ELEMENT PublicationTypeList (PublicationType+)>
+<!ELEMENT Publisher (#PCDATA)>
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Season (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+<!ELEMENT StartPage (#PCDATA)>
+<!ELEMENT Suffix (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ELEMENT TitleAssociatedWithName (#PCDATA)>
+<!ELEMENT VernacularTitle (#PCDATA)>
+<!ELEMENT Volume (#PCDATA)>
+<!ELEMENT Year (#PCDATA)>
\ No newline at end of file
diff --git a/dtd/nlmcommon_070101.dtd b/dtd/nlmcommon_070101.dtd
new file mode 100644
index 0000000..cac03d6
--- /dev/null
+++ b/dtd/nlmcommon_070101.dtd
@@ -0,0 +1,187 @@
+<!-- NLMCommon DTD
+
+     Comments and suggestions are welcome.
+     January 1, 2007 (v. 3)
+
+            
+     This is the DTD for data elements that are shared 
+     among various applications at the U.S. National Library of Medicine. 
+ 
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!--    NLMCommon.dtd
+
+        Document Type Definition for the PubMed Article DTD
+        $Id: nlmcommon_070101.dtd,v 1.1 2007-06-01 05:44:04 alexs Exp $
+-->
+<!-- ====================================================================== -->
+<!--   Revision Notes Section
+    
+    The following changes were made in the nlmcommon_070101.dtd:
+    
+     a. Changed NlmUniqueID? to %NlmUniqueID.Ref in MedlineJournalInfo
+
+     b. Changed MedlineJournalInfo? to MedlineJournalInfo in NCBIAricle element 
+
+            
+     Historic Revision notes for previous versions of NLMCommon DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmcommon.html
+-->
+<!-- ================================================================= -->
+<!--     internal DTD entities             -->   
+<!ENTITY % Abstract "(AbstractText,CopyrightInformation?)">
+<!ENTITY % personal.name "(LastName,(ForeName|(FirstName,MiddleName?))?,
+                           Initials?,Suffix?)">
+<!ENTITY % author.name "(%personal.name; | CollectiveName)">
+<!ENTITY % data.template "#PCDATA">
+<!ENTITY % ImprintType "(Current | Original)">
+<!ENTITY % IndexingStatus "(Ceased-publication |  Continued-by-another-indexed-title | 
+                            Currently-indexed |  Currently-indexed-Title-changed |
+                            Date-range-of-indexed-citations-unspecified | 
+                            Deselected) #IMPLIED">
+<!ENTITY % IndexingTreatment "(Unknown | Full | Selective | ReferencedIn | 
+                               ReferencedInNoDetails) #IMPLIED">
+<!ENTITY % normal.date "(Year,Month,Day,(Hour,(Minute,Second?)?)?)">
+<!ENTITY % pub.date "((Year, ((Month, Day?) | Season)?) | MedlineDate)">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- This is the top level element for NCBIArticle -->
+<!ELEMENT NCBIArticle (PMID, Article, MedlineJournalInfo)>
+<!-- ================================================================= -->
+<!-- This is the top level element for Article -->
+<!ELEMENT Article ((Journal | Book), %ArticleTitle.Ref;, Pagination, Abstract?,
+                    Affiliation?, AuthorList?, Language+, DataBankList?, 
+                    GrantList?, %PublicationType.Ref;, VernacularTitle?,
+                    ArticleDate*)>
+<!-- ================================================================= -->
+<!--  Further Definitions of NLM Tags                                  -->
+<!ELEMENT Abstract (%Abstract;)>
+<!ELEMENT AbstractText (#PCDATA)>
+<!ELEMENT AccessionNumber (#PCDATA)>
+<!ELEMENT AccessionNumberList (AccessionNumber+)>
+<!ELEMENT Acronym (#PCDATA)>
+<!ELEMENT Affiliation (#PCDATA)>
+<!ELEMENT Agency (#PCDATA)>
+<!ELEMENT ArticleDate (%normal.date;)>
+<!ATTLIST ArticleDate
+          DateType CDATA  #FIXED "Electronic">
+<!ELEMENT ArticleTitle (#PCDATA)>
+<!ELEMENT Author ((%author.name;), Affiliation?,DatesAssociatedWithName?,
+                 NameQualifier?,OtherInformation?,TitleAssociatedWithName?)>
+<!ATTLIST Author
+	ValidYN (Y | N) "Y"
+>
+<!ELEMENT AuthorList (Author+)>
+<!ATTLIST AuthorList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Book (%PubDate.Ref;, Publisher, Title, AuthorList?,
+                CollectionTitle?, Volume?)>
+<!ELEMENT BroadJournalHeading (#PCDATA)>
+<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT CollectionTitle (#PCDATA)>
+<!ELEMENT CollectiveName (#PCDATA)>
+<!ELEMENT CopyrightInformation (#PCDATA)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT Coverage  (#PCDATA)>
+<!ELEMENT DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT DataBankList (DataBank+)>
+<!ATTLIST DataBankList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT DataBankName (#PCDATA)>
+<!ELEMENT DateIssued (#PCDATA)>
+<!ELEMENT DatesAssociatedWithName (#PCDATA)>
+<!ELEMENT DatesOfSerialPublication (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Edition (#PCDATA)>
+<!ELEMENT EndPage (#PCDATA)>
+<!ELEMENT FirstName (#PCDATA)>
+<!ELEMENT ForeName (#PCDATA)>
+<!ELEMENT Frequency (#PCDATA)>
+<!ATTLIST Frequency 
+          FrequencyType (Current | Former) "Current"
+>
+<!ELEMENT Grant (%GrantID.Ref;, %Acronym.Ref;, %Agency.Ref;)>
+<!ELEMENT GrantID (#PCDATA)>
+<!ELEMENT GrantList (Grant+)>
+<!ATTLIST GrantList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Imprint (#PCDATA)>
+<!ELEMENT Initials (#PCDATA)>
+<!ELEMENT ISOAbbreviation (#PCDATA)>
+<!ELEMENT ISSN (#PCDATA)>
+<!ATTLIST ISSN
+	  IssnType  (Electronic | Print | Undetermined) #REQUIRED
+>
+<!ELEMENT Issue (#PCDATA)>
+<!ELEMENT Journal (%ISSN.Ref;, JournalIssue, Coden?, Title?, ISOAbbreviation?)>
+<!ELEMENT JournalIssue (Volume?, Issue?, %PubDate.Ref;)>
+<!ATTLIST JournalIssue
+	CitedMedium (Internet | Print) #REQUIRED
+>
+<!ELEMENT Language (#PCDATA)>
+<!ELEMENT LastName (#PCDATA)>
+<!ELEMENT MedlineDate (#PCDATA)>
+<!ELEMENT MedlineJournalInfo (Country?, MedlineTA, %NlmUniqueID.Ref;)>
+<!ELEMENT MedlinePgn (#PCDATA)>
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT MiddleName (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT NameQualifier (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
+<!ELEMENT OtherInformation (#PCDATA)>
+<!ELEMENT Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT Place (#PCDATA)>
+<!ATTLIST Place  
+       ImprintType %ImprintType; "Current"
+>
+<!ELEMENT PlaceCode (#PCDATA)>
+<!ELEMENT PMID (#PCDATA)>
+<!ELEMENT ProjectedPublicationDate (#PCDATA)>
+<!ELEMENT PubDate (%pub.date;)>
+<!ELEMENT PublicationEndYear (#PCDATA)>
+<!ELEMENT PublicationFirstYear (#PCDATA)>
+<!ELEMENT PublicationInfo (Country?, PlaceCode?, Imprint*, Place*, 
+                           Publisher*, DateIssued*,  ProjectedPublicationDate?,
+                           PublicationFirstYear?, PublicationEndYear?, Edition?,
+                           DatesOfSerialPublication*, Frequency*)>
+<!ELEMENT PublicationType (#PCDATA)>
+<!ELEMENT PublicationTypeList (PublicationType+)>
+<!ELEMENT Publisher (#PCDATA)>
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Season (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+<!ELEMENT StartPage (#PCDATA)>
+<!ELEMENT Suffix (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ELEMENT TitleAssociatedWithName (#PCDATA)>
+<!ELEMENT VernacularTitle (#PCDATA)>
+<!ELEMENT Volume (#PCDATA)>
+<!ELEMENT Year (#PCDATA)>
\ No newline at end of file
diff --git a/dtd/nlmcommon_080101.dtd b/dtd/nlmcommon_080101.dtd
new file mode 100644
index 0000000..ac0ae02
--- /dev/null
+++ b/dtd/nlmcommon_080101.dtd
@@ -0,0 +1,201 @@
+<!-- NLMCommon DTD
+
+     Comments and suggestions are welcome.
+     January 1, 2008 
+
+             
+     This is the DTD for data elements that are shared 
+     among various applications at the U.S. National Library of Medicine. 
+ 
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!--    NLMCommon.dtd
+
+        Document Type Definition for the PubMed Article DTD
+        $Id: nlmcommon_080101.dtd 114839 2007-11-30 16:19:51Z korobtch $
+-->
+<!-- ====================================================================== -->
+<!--   Revision Notes Section
+    
+    The following changes were made in the nlmcommon_080101.dtd:
+    
+     a. Added ELocationID in Article
+            
+     b. Added EIdType and ValidYN as attributes to ELocationID 
+
+     c. Added ISSNLinking to MedlineJournalInfo
+
+     d. Investigator & InvestigatorList were moved from nlmsharedcatcit dtd to
+        nlmcommon dtd
+            
+     Historic Revision notes for previous versions of NLMCommon DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmcommon.html
+-->
+<!-- ================================================================= -->
+<!--     internal DTD entities             -->   
+<!ENTITY % Abstract "(AbstractText,CopyrightInformation?)">
+<!ENTITY % personal.name "(LastName,(ForeName|(FirstName,MiddleName?))?,
+                           Initials?,Suffix?)">
+<!ENTITY % author.name "(%personal.name; | CollectiveName)">
+<!ENTITY % data.template "#PCDATA">
+<!ENTITY % ImprintType "(Current | Original)">
+<!ENTITY % IndexingStatus "(Ceased-publication |  Continued-by-another-indexed-title | 
+                            Currently-indexed |  Currently-indexed-Title-changed |
+                            Date-range-of-indexed-citations-unspecified | 
+                            Deselected) #IMPLIED">
+<!ENTITY % IndexingTreatment "(Unknown | Full | Selective | ReferencedIn | 
+                               ReferencedInNoDetails) #IMPLIED">
+<!ENTITY % normal.date "(Year,Month,Day,(Hour,(Minute,Second?)?)?)">
+<!ENTITY % pub.date "((Year, ((Month, Day?) | Season)?) | MedlineDate)">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- This is the top level element for NCBIArticle -->
+<!ELEMENT NCBIArticle (PMID, Article, MedlineJournalInfo,InvestigatorList?)>
+<!-- ================================================================= -->
+<!-- This is the top level element for Article -->
+<!ELEMENT Article ((Journal | Book), %ArticleTitle.Ref;,
+                  ((Pagination, ELocationID*) | ELocationID+),
+                   Abstract?, Affiliation?, AuthorList?, Language+, DataBankList?, 
+                    GrantList?, %PublicationType.Ref;, VernacularTitle?,
+                    ArticleDate*)>
+<!-- ================================================================= -->
+<!--  Further Definitions of NLM Tags                                  -->
+<!ELEMENT Abstract (%Abstract;)>
+<!ELEMENT AbstractText (#PCDATA)>
+<!ELEMENT AccessionNumber (#PCDATA)>
+<!ELEMENT AccessionNumberList (AccessionNumber+)>
+<!ELEMENT Acronym (#PCDATA)>
+<!ELEMENT Affiliation (#PCDATA)>
+<!ELEMENT Agency (#PCDATA)>
+<!ELEMENT ArticleDate (%normal.date;)>
+<!ATTLIST ArticleDate
+          DateType CDATA  #FIXED "Electronic">
+<!ELEMENT ArticleTitle (#PCDATA)>
+<!ELEMENT Author ((%author.name;), Affiliation?,DatesAssociatedWithName?,
+                 NameQualifier?,OtherInformation?,TitleAssociatedWithName?)>
+<!ATTLIST Author
+	ValidYN (Y | N) "Y"
+>
+<!ELEMENT AuthorList (Author+)>
+<!ATTLIST AuthorList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Book (%PubDate.Ref;, Publisher, Title, AuthorList?,
+                CollectionTitle?, Volume?)>
+<!ELEMENT BroadJournalHeading (#PCDATA)>
+<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT CollectionTitle (#PCDATA)>
+<!ELEMENT CollectiveName (#PCDATA)>
+<!ELEMENT CopyrightInformation (#PCDATA)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT Coverage  (#PCDATA)>
+<!ELEMENT DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT DataBankList (DataBank+)>
+<!ATTLIST DataBankList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT DataBankName (#PCDATA)>
+<!ELEMENT DateIssued (#PCDATA)>
+<!ELEMENT DatesAssociatedWithName (#PCDATA)>
+<!ELEMENT DatesOfSerialPublication (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Edition (#PCDATA)>
+<!ELEMENT ELocationID (#PCDATA)>
+<!ATTLIST ELocationID
+          EIdType %EIdType;
+          ValidYN  (Y | N) "Y"
+>
+<!ELEMENT EndPage (#PCDATA)>
+<!ELEMENT FirstName (#PCDATA)>
+<!ELEMENT ForeName (#PCDATA)>
+<!ELEMENT Frequency (#PCDATA)>
+<!ATTLIST Frequency 
+          FrequencyType (Current | Former) "Current"
+>
+<!ELEMENT Grant (%GrantID.Ref;, %Acronym.Ref;, %Agency.Ref;)>
+<!ELEMENT GrantID (#PCDATA)>
+<!ELEMENT GrantList (Grant+)>
+<!ATTLIST GrantList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Imprint (#PCDATA)>
+<!ELEMENT Initials (#PCDATA)>
+<!ELEMENT Investigator (%personal.name;, Affiliation?)>
+<!ELEMENT InvestigatorList (Investigator+)>
+<!ELEMENT ISOAbbreviation (#PCDATA)>
+<!ELEMENT ISSN (#PCDATA)>
+<!ATTLIST ISSN
+	  IssnType  (Electronic | Print | Undetermined) #REQUIRED
+>
+<!ELEMENT ISSNLinking (#PCDATA)>
+<!ELEMENT Issue (#PCDATA)>
+<!ELEMENT Journal (%ISSN.Ref;, JournalIssue, Coden?, Title?, ISOAbbreviation?)>
+<!ELEMENT JournalIssue (Volume?, Issue?, %PubDate.Ref;)>
+<!ATTLIST JournalIssue
+	CitedMedium (Internet | Print) #REQUIRED
+>
+<!ELEMENT Language (#PCDATA)>
+<!ELEMENT LastName (#PCDATA)>
+<!ELEMENT MedlineDate (#PCDATA)>
+<!ELEMENT MedlineJournalInfo (Country?, MedlineTA, %NlmUniqueID.Ref;, ISSNLinking?)>
+<!ELEMENT MedlinePgn (#PCDATA)>
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT MiddleName (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT NameQualifier (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
+<!ELEMENT OtherInformation (#PCDATA)>
+<!ELEMENT Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT Place (#PCDATA)>
+<!ATTLIST Place  
+       ImprintType %ImprintType; "Current"
+>
+<!ELEMENT PlaceCode (#PCDATA)>
+<!ELEMENT PMID (#PCDATA)>
+<!ELEMENT ProjectedPublicationDate (#PCDATA)>
+<!ELEMENT PubDate (%pub.date;)>
+<!ELEMENT PublicationEndYear (#PCDATA)>
+<!ELEMENT PublicationFirstYear (#PCDATA)>
+<!ELEMENT PublicationInfo (Country?, PlaceCode?, Imprint*, Place*, 
+                           Publisher*, DateIssued*,  ProjectedPublicationDate?,
+                           PublicationFirstYear?, PublicationEndYear?, Edition?,
+                           DatesOfSerialPublication*, Frequency*)>
+<!ELEMENT PublicationType (#PCDATA)>
+<!ELEMENT PublicationTypeList (PublicationType+)>
+<!ELEMENT Publisher (#PCDATA)>
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Season (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+<!ELEMENT StartPage (#PCDATA)>
+<!ELEMENT Suffix (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ELEMENT TitleAssociatedWithName (#PCDATA)>
+<!ELEMENT VernacularTitle (#PCDATA)>
+<!ELEMENT Volume (#PCDATA)>
+<!ELEMENT Year (#PCDATA)>
diff --git a/dtd/nlmcommon_090101.dtd b/dtd/nlmcommon_090101.dtd
new file mode 100644
index 0000000..787129b
--- /dev/null
+++ b/dtd/nlmcommon_090101.dtd
@@ -0,0 +1,220 @@
+<!-- NLMCommon DTD
+
+     Comments and suggestions are welcome.
+     January 1, 2009 v.2
+
+     **THIS IS THE FORTHCOMING DTD FOR 2009 NOT CURRENTLY IN USE.  
+     SEE http://www.nlm.nih.gov/databases/dtd/nlmcommon_080101.dtd FOR THE 
+     NLMCOMMON DTD DATED JANUARY 1, 2008 CURRENTLY IN USE.**  
+             
+     This is the DTD for data elements that are shared 
+     among various applications at the U.S. National Library of Medicine. 
+ 
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!--    NLMCommon.dtd
+
+        Document Type Definition for the PubMed Article DTD
+        $Id: nlmcommon_090101.dtd,v 1.1 2008-12-13 18:18:29 peterc Exp $
+-->
+<!-- ====================================================================== -->
+<!--   Revision Notes Section
+    
+    The following changes were made in the nlmcommon_090101.dtd:
+    
+     a. Added ValidYN attribute to Investigator element
+            
+     b. Moved OtherAbstract element from nlmsharedcatcit to nlmcommon dtd
+
+     c. Added OtherAbstract element to NCBIArticle element
+
+     d. Moved entity Type from nlmmedlinecitation to nlmcommon dtd
+ 
+     e. Added Publisher value to entity Type 
+     
+     f. Deleted Consumer value from entity Type 
+
+     g. Added Country element to Grant element
+  
+     h. FOR V.2: Changed Country value to GrantCountry.Ref in Grant element
+ 
+                
+     Historic Revision notes for previous versions of NLMCommon DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmcommon.html
+-->
+<!-- ================================================================= -->
+<!--     internal DTD entities             -->   
+<!ENTITY % Abstract "(AbstractText,CopyrightInformation?)">
+<!ENTITY % personal.name "(LastName,(ForeName|(FirstName,MiddleName?))?,
+                           Initials?,Suffix?)">
+<!ENTITY % author.name "(%personal.name; | CollectiveName)">
+<!ENTITY % data.template "#PCDATA">
+<!ENTITY % ImprintType "(Current | Original)">
+<!ENTITY % IndexingStatus "(Ceased-publication |  Continued-by-another-indexed-title | 
+                            Currently-indexed |  Currently-indexed-Title-changed |
+                            Date-range-of-indexed-citations-unspecified | 
+                            Deselected) #IMPLIED">
+<!ENTITY % IndexingTreatment "(Unknown | Full | Selective | ReferencedIn | 
+                               ReferencedInNoDetails) #IMPLIED">
+<!ENTITY % normal.date "(Year,Month,Day,(Hour,(Minute,Second?)?)?)">
+<!ENTITY % pub.date "((Year, ((Month, Day?) | Season)?) | MedlineDate)">
+<!ENTITY % Type "(AAMC | AIDS | KIE | PIP | NASA | Publisher) #REQUIRED">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- This is the top level element for NCBIArticle -->
+<!ELEMENT NCBIArticle (PMID, Article, MedlineJournalInfo,InvestigatorList?,OtherAbstract?)>
+<!-- ================================================================= -->
+<!-- This is the top level element for Article -->
+<!ELEMENT Article ((Journal | Book), %ArticleTitle.Ref;,
+                  ((Pagination, ELocationID*) | ELocationID+),
+                   Abstract?, Affiliation?, AuthorList?, Language+, DataBankList?, 
+                    GrantList?, %PublicationType.Ref;, VernacularTitle?,
+                    ArticleDate*)>
+<!-- ================================================================= -->
+<!--  Further Definitions of NLM Tags                                  -->
+<!ELEMENT Abstract (%Abstract;)>
+<!ELEMENT AbstractText (#PCDATA)>
+<!ELEMENT AccessionNumber (#PCDATA)>
+<!ELEMENT AccessionNumberList (AccessionNumber+)>
+<!ELEMENT Acronym (#PCDATA)>
+<!ELEMENT Affiliation (#PCDATA)>
+<!ELEMENT Agency (#PCDATA)>
+<!ELEMENT ArticleDate (%normal.date;)>
+<!ATTLIST ArticleDate
+          DateType CDATA  #FIXED "Electronic">
+<!ELEMENT ArticleTitle (#PCDATA)>
+<!ELEMENT Author ((%author.name;), Affiliation?,DatesAssociatedWithName?,
+                 NameQualifier?,OtherInformation?,TitleAssociatedWithName?)>
+<!ATTLIST Author
+	ValidYN (Y | N) "Y"
+>
+<!ELEMENT AuthorList (Author+)>
+<!ATTLIST AuthorList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Book (%PubDate.Ref;, Publisher, Title, AuthorList?,
+                CollectionTitle?, Volume?)>
+<!ELEMENT BroadJournalHeading (#PCDATA)>
+<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT CollectionTitle (#PCDATA)>
+<!ELEMENT CollectiveName (#PCDATA)>
+<!ELEMENT CopyrightInformation (#PCDATA)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT Coverage  (#PCDATA)>
+<!ELEMENT DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT DataBankList (DataBank+)>
+<!ATTLIST DataBankList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT DataBankName (#PCDATA)>
+<!ELEMENT DateIssued (#PCDATA)>
+<!ELEMENT DatesAssociatedWithName (#PCDATA)>
+<!ELEMENT DatesOfSerialPublication (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Edition (#PCDATA)>
+<!ELEMENT ELocationID (#PCDATA)>
+<!ATTLIST ELocationID
+          EIdType %EIdType;
+          ValidYN  (Y | N) "Y"
+>
+<!ELEMENT EndPage (#PCDATA)>
+<!ELEMENT FirstName (#PCDATA)>
+<!ELEMENT ForeName (#PCDATA)>
+<!ELEMENT Frequency (#PCDATA)>
+<!ATTLIST Frequency 
+          FrequencyType (Current | Former) "Current"
+>
+<!ELEMENT Grant (%GrantID.Ref;, %Acronym.Ref;, %Agency.Ref;, %GrantCountry.Ref;)>
+<!ELEMENT GrantID (#PCDATA)>
+<!ELEMENT GrantList (Grant+)>
+<!ATTLIST GrantList
+	CompleteYN (Y | N) "Y"
+>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Imprint (#PCDATA)>
+<!ELEMENT Initials (#PCDATA)>
+<!ELEMENT Investigator (%personal.name;, Affiliation?)>
+<!ATTLIST Investigator
+          ValidYN (Y | N) "Y"
+>
+<!ELEMENT InvestigatorList (Investigator+)>
+<!ELEMENT ISOAbbreviation (#PCDATA)>
+<!ELEMENT ISSN (#PCDATA)>
+<!ATTLIST ISSN
+	  IssnType  (Electronic | Print | Undetermined) #REQUIRED
+>
+<!ELEMENT ISSNLinking (#PCDATA)>
+<!ELEMENT Issue (#PCDATA)>
+<!ELEMENT Journal (%ISSN.Ref;, JournalIssue, Coden?, Title?, ISOAbbreviation?)>
+<!ELEMENT JournalIssue (Volume?, Issue?, %PubDate.Ref;)>
+<!ATTLIST JournalIssue
+	CitedMedium (Internet | Print) #REQUIRED
+>
+<!ELEMENT Language (#PCDATA)>
+<!ELEMENT LastName (#PCDATA)>
+<!ELEMENT MedlineDate (#PCDATA)>
+<!ELEMENT MedlineJournalInfo (Country?, MedlineTA, %NlmUniqueID.Ref;, ISSNLinking?)>
+<!ELEMENT MedlinePgn (#PCDATA)>
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT MiddleName (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT NameQualifier (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
+<!ELEMENT OtherAbstract (%Abstract;)>
+<!ATTLIST OtherAbstract
+	Type %Type;
+>
+<!ELEMENT OtherInformation (#PCDATA)>
+<!ELEMENT Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT Place (#PCDATA)>
+<!ATTLIST Place  
+       ImprintType %ImprintType; "Current"
+>
+<!ELEMENT PlaceCode (#PCDATA)>
+<!ELEMENT PMID (#PCDATA)>
+<!ELEMENT ProjectedPublicationDate (#PCDATA)>
+<!ELEMENT PubDate (%pub.date;)>
+<!ELEMENT PublicationEndYear (#PCDATA)>
+<!ELEMENT PublicationFirstYear (#PCDATA)>
+<!ELEMENT PublicationInfo (Country?, PlaceCode?, Imprint*, Place*, 
+                           Publisher*, DateIssued*,  ProjectedPublicationDate?,
+                           PublicationFirstYear?, PublicationEndYear?, Edition?,
+                           DatesOfSerialPublication*, Frequency*)>
+<!ELEMENT PublicationType (#PCDATA)>
+<!ELEMENT PublicationTypeList (PublicationType+)>
+<!ELEMENT Publisher (#PCDATA)>
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Season (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+<!ELEMENT StartPage (#PCDATA)>
+<!ELEMENT Suffix (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ELEMENT TitleAssociatedWithName (#PCDATA)>
+<!ELEMENT VernacularTitle (#PCDATA)>
+<!ELEMENT Volume (#PCDATA)>
+<!ELEMENT Year (#PCDATA)>
\ No newline at end of file
diff --git a/dtd/nlmmedline_011101.dtd b/dtd/nlmmedline_011101.dtd
new file mode 100644
index 0000000..1c5aa06
--- /dev/null
+++ b/dtd/nlmmedline_011101.dtd
@@ -0,0 +1,60 @@
+<!-- NLM Medline DTD              
+
+        This is the DTD which NLM has written for External Use. 
+        If you are a data Licensee, use the information
+        from the MedlineCitation Set.       
+ 
+        Comments and suggestions are welcome.
+        November 1, 2001
+       
+
+      
+-->
+<!-- ================================================================= -->
+<!--   NLM Medline DTD   -->
+<!-- Typical usage:   
+
+  <!DOCTYPE MedlineCitationSet PUBLIC "-//NLM//DTD NLM//EN">
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section  
+ 
+  The following changes were made in the nlmmedline_011101.dtd:
+
+       a.  Made MedlineID optional
+ 
+  The following changes were made in the nlmmedline_010319.dtd:
+
+       a.  The entity reference changed to:
+          nlmmedlinecitation_010322.dtd.    
+       b.  Added PMID entity 
+
+       c.  The entity reference changed back to 
+          nlmmedlinecitation_010319.dtd.
+ 
+       d.  Added GrantID, Agency, Acronym entity references 
+
+       e.  Added MedlineID entity  
+
+ 
+-->
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref        "ISSN?">
+<!ENTITY % DateCreated.Ref "DateCreated">
+<!ENTITY % PubDate.Ref     "PubDate">
+<!ENTITY % PMID.Ref        "PMID">
+<!ENTITY % MedlineID.Ref   "MedlineID?">
+<!ENTITY % GrantID.Ref     "GrantID?">
+<!ENTITY % Agency.Ref      "Agency">
+<!ENTITY % Acronym.Ref     "Acronym?">
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM MedlineCitation DTD is located  -->
+<!ENTITY % MedlineCitation PUBLIC "-//NLM//DTD MedlineCitation, 1st November 2001//EN"
+"nlmmedlinecitation_011101.dtd" >
+%MedlineCitation;
+<!-- ================================================================= -->
+<!ELEMENT MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT DeleteCitation (MedlineID+ | PMID+)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedline_060101.dtd b/dtd/nlmmedline_060101.dtd
new file mode 100644
index 0000000..d793f51
--- /dev/null
+++ b/dtd/nlmmedline_060101.dtd
@@ -0,0 +1,70 @@
+<!-- NLMMedline DTD              
+
+     Comments and suggestions are welcome.
+     January 1, 2006
+
+     **See http://www.nlm.nih.gov/databases/dtd/nlmmedline_070101.dtd for the forthcoming
+     NLMMedline DTD dated January 1, 2007 for future use.**
+
+     This is the DTD which the U.S. National Library of Medicine 
+     has written for External Use.        
+     If you are a data Licensee, the data are found in 
+     MedlineCitationSet.       
+ 
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+     MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   NLMMedline DTD   -->
+<!-- Typical usage:   
+
+  <!DOCTYPE MedlineCitationSet PUBLIC "-//NLM//DTD NLM Medline//EN">
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedline_060101.dtd:
+  
+       a.  Changed entity reference from "nlmmedlinecitation_041101.dtd"
+           to: "nlmmedlinecitation_060101.dtd"
+
+       b.  Added PublicationType entity reference  
+
+         
+     Historic Revision notes for previous versions of NLMMedline DTD 
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html
+-->
+<!-- ================================================================= -->
+<!--  external DTD entities                        -->
+<!ENTITY % Acronym.Ref "Acronym?">
+<!ENTITY % Agency.Ref "Agency">
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % DateCreated.Ref "DateCreated">
+<!ENTITY % GrantID.Ref "GrantID?">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % NlmDcmsID.Ref "NlmDcmsID?">
+<!ENTITY % PMID.Ref "PMID">
+<!ENTITY % PubDate.Ref "PubDate">
+<!ENTITY % PublicationType.Ref  "PublicationTypeList">
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM MedlineCitation DTD is located  -->
+<!ENTITY % MedlineCitation PUBLIC "-//NLM//DTD MedlineCitation, 1st January 2006//EN"
+"nlmmedlinecitation_060101.dtd" >  
+%MedlineCitation;
+<!-- ================================================================= -->
+<!ELEMENT DeleteCitation (PMID+)>
+<!ELEMENT MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedline_070101.dtd b/dtd/nlmmedline_070101.dtd
new file mode 100644
index 0000000..83a5e52
--- /dev/null
+++ b/dtd/nlmmedline_070101.dtd
@@ -0,0 +1,67 @@
+<!-- NLMMedline DTD              
+
+
+     Comments and suggestions are welcome.
+     January 1, 2007
+    
+            
+     This is the DTD which the U.S. National Library of Medicine 
+     has written for External Use.        
+     If you are a data Licensee, the data are found in 
+     MedlineCitationSet.       
+ 
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+     MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   NLMMedline DTD   -->
+<!-- Typical usage:   
+
+  <!DOCTYPE MedlineCitationSet PUBLIC "-//NLM//DTD NLM Medline//EN">
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedline_060101.dtd:
+  
+       a.  Changed entity reference from "nlmmedlinecitation_060101.dtd"
+           to: "nlmmedlinecitation_070101.dtd"
+
+               
+     Historic Revision notes for previous versions of NLMMedline DTD 
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html
+-->
+<!-- ================================================================= -->
+<!--  external DTD entities                        -->
+<!ENTITY % Acronym.Ref "Acronym?">
+<!ENTITY % Agency.Ref "Agency">
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % DateCreated.Ref "DateCreated">
+<!ENTITY % GrantID.Ref "GrantID?">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % NlmDcmsID.Ref "NlmDcmsID?">
+<!ENTITY % PMID.Ref "PMID">
+<!ENTITY % PubDate.Ref "PubDate">
+<!ENTITY % PublicationType.Ref  "PublicationTypeList">
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM MedlineCitation DTD is located  -->
+<!ENTITY % MedlineCitation PUBLIC "-//NLM//DTD MedlineCitation, 1st January 2007//EN"
+"nlmmedlinecitation_070101.dtd" >  
+%MedlineCitation;
+<!-- ================================================================= -->
+<!ELEMENT DeleteCitation (PMID+)>
+<!ELEMENT MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedline_080101.dtd b/dtd/nlmmedline_080101.dtd
new file mode 100644
index 0000000..1f935d1
--- /dev/null
+++ b/dtd/nlmmedline_080101.dtd
@@ -0,0 +1,71 @@
+<!-- NLMMedline DTD              
+
+     **THIS IS THE FORTHCOMING DTD FOR 2008 NOT CURRENTLY IN USE.  SEE
+       http://www.nlm.nih.gov/databases/dtd/nlmmedline_070101.dtd FOR THE
+       NLMMEDLINE DTD DATED JANUARY 1, 2007 CURRENTLY IN USE.
+    
+
+     Comments and suggestions are welcome.
+     January 1, 2008
+    
+            
+     This is the DTD which the U.S. National Library of Medicine 
+     has written for External Use.        
+     If you are a data Licensee, the data are found in 
+     MedlineCitationSet.       
+ 
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+     MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   NLMMedline DTD   -->
+<!-- Typical usage:   
+
+  <!DOCTYPE MedlineCitationSet PUBLIC "-//NLM//DTD NLM Medline//EN">
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedline_070101.dtd:
+  
+       a.  Changed entity reference from "nlmmedlinecitation_070101.dtd"
+           to: "nlmmedlinecitation_080101.dtd"
+
+               
+     Historic Revision notes for previous versions of NLMMedline DTD 
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html
+-->
+<!-- ================================================================= -->
+<!--  external DTD entities                        -->
+<!ENTITY % Acronym.Ref "Acronym?">
+<!ENTITY % Agency.Ref "Agency">
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % DateCreated.Ref "DateCreated">
+<!ENTITY % GrantID.Ref "GrantID?">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % NlmDcmsID.Ref "NlmDcmsID?">
+<!ENTITY % PMID.Ref "PMID">
+<!ENTITY % PubDate.Ref "PubDate">
+<!ENTITY % PublicationType.Ref  "PublicationTypeList">
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM MedlineCitation DTD is located  -->
+<!ENTITY % MedlineCitation PUBLIC "-//NLM//DTD MedlineCitation, 1st January 2008//EN"
+"nlmmedlinecitation_080101.dtd" >  
+%MedlineCitation;
+<!-- ================================================================= -->
+<!ELEMENT DeleteCitation (PMID+)>
+<!ELEMENT MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedline_090101.dtd b/dtd/nlmmedline_090101.dtd
new file mode 100644
index 0000000..d903ebd
--- /dev/null
+++ b/dtd/nlmmedline_090101.dtd
@@ -0,0 +1,74 @@
+<!-- NLMMedline DTD              
+
+     Comments and suggestions are welcome.
+     January 1, 2009 v.3
+
+     **THIS IS THE FORTHCOMING DTD FOR 2009 NOT CURRENTLY IN USE.  
+     SEE http://www.nlm.nih.gov/databases/dtd/nlmmedline_080101.dtd FOR THE 
+     NLMMEDLINE DTD DATED JANUARY 1, 2008 CURRENTLY IN USE.**  
+            
+     This is the DTD which the U.S. National Library of Medicine 
+     has written for External Use.        
+     If you are a data Licensee, the data are found in 
+     MedlineCitationSet.       
+ 
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+     MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   NLMMedline DTD   -->
+<!-- Typical usage:   
+
+  <!DOCTYPE MedlineCitationSet PUBLIC "-//NLM//DTD NLM Medline//EN">
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedline_090101.dtd:
+  
+       a.  Changed entity reference from "nlmmedlinecitation_080101.dtd"
+           to: "nlmmedlinecitation_090101.dtd"
+
+       b.  CHANGE WITHDRAWN FOR V.2: Delete entity NlmDcmsID.Ref and
+           NlmDcmsID element
+
+       c.  FOR V.3: Added GrantCountry.Ref entity
+        
+     Historic Revision notes for previous versions of NLMMedline DTD 
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html
+-->
+<!-- ================================================================= -->
+<!--  external DTD entities                        -->
+<!ENTITY % Acronym.Ref "Acronym?">
+<!ENTITY % Agency.Ref "Agency">
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % DateCreated.Ref "DateCreated">
+<!ENTITY % GrantCountry.Ref "Country?">
+<!ENTITY % GrantID.Ref "GrantID?">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % NlmDcmsID.Ref "NlmDcmsID?">
+<!ENTITY % PMID.Ref "PMID">
+<!ENTITY % PubDate.Ref "PubDate">
+<!ENTITY % PublicationType.Ref  "PublicationTypeList">
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM MedlineCitation DTD is located  -->
+<!ENTITY % MedlineCitation PUBLIC "-//NLM//DTD MedlineCitation, 1st January 2009//EN"
+"nlmmedlinecitation_090101.dtd" >  
+%MedlineCitation;
+<!-- ================================================================= -->
+<!ELEMENT DeleteCitation (PMID+)>
+<!ELEMENT MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedlinecitation_011101.dtd b/dtd/nlmmedlinecitation_011101.dtd
new file mode 100644
index 0000000..6b8a447
--- /dev/null
+++ b/dtd/nlmmedlinecitation_011101.dtd
@@ -0,0 +1,178 @@
+<!-- MedlineCitation DTD              
+
+     This is the DTD which NLM has written for External Use.      
+      
+        Comments and suggestions are welcome.
+        November 1, 2001 
+  
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section  
+  
+ The following changes were made in the nlmmedlinecitation_011101.dtd:
+ 
+     a.  Added NOTNLM to Owner entity.
+
+     b.  Added Status Entity.
+    
+     c.  Added Status attribute for MedlineCitation.
+
+     d.  Added RegistryNumber to Chemical Element.
+
+     e.  Added PMID and MedlineID to CommentsCorrections. 
+   
+     f.  Added NRCBL value to SOURCE entity. 
+
+ The following changes were made in the nlmmedlinecitation_010319.dtd:
+
+     a.  Added the following values to the Owner entity: (NASA | PIP | KIE | HSR | HMD | SIS )
+     
+     b.  Removed AdditionalInformation element from MedlineCitation
+       (note, this element had been optional and was never used)
+ 
+     c.  Added the following elements to MedlineCitation:
+         OtherID
+         OtherAbstract 
+         KeywordList
+         SpaceFlightMission
+         InvestigatorList
+         GeneralNote 
+   
+     d.  Added Affiliation to Investigator
+
+     e.  Removed Procurement Source from DTD
+
+     f.  Removed AbstractAuthor from OtherAbstract
+
+     g.  Added Attribute List for OtherAbstract Type  
+   
+     h.  Added NLM default to MedlineCitationOwner attribute. 
+
+     i.  Added %PMID.Ref Entity
+
+     j.  Added Attribute for Keyword 
+
+     k.  Removed Element Owner and Element Type from DTD. 
+ 
+     l.  Added NLM default to KeywordList & GeneralNote Owner attribute. 
+
+     m.  Added attribute values for OtherID Source.
+
+     n.  Added ErratumFor to the CommentsCorrections element.
+   
+     o.  Changed Investigator element to reference personalname.
+
+     p.  Added SummaryForPatientsIn and OriginalReportIn to 
+         CommentCorrections
+
+     q.  Added %MedlineID.Ref Entity
+
+
+-->
+<!-- ================================================================= -->
+<!--   NLM Medline DTD   -->
+<!-- Typical usage:   
+
+  <!DOCTYPE MedlineCitationSet PUBLIC "-//NLM//DTD NLM//EN">
+
+-->
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM Common DTD is located  -->
+<!-- "http://www.nlm.nih.gov/databases/dtd/nlmcommon_011101.dtd" -->
+<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 
+1st November 2001//EN"  
+"http://www.nlm.nih.gov/databases/dtd/nlmcommon_011101.dtd" >
+%NlmCommon;
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- internal DTD entities -->
+<!ENTITY % Ref.template "(RefSource,
+                          (PMID | MedlineID)?,
+                          Note?)">
+<!ELEMENT RefSource (#PCDATA)>
+<!ELEMENT Note (#PCDATA)>
+<!ENTITY % Owner "(NLM | NASA | PIP | KIE | HSR | HMD | SIS | NOTNLM)">
+<!ENTITY % Type "(AAMC | AIDS | KIE | PIP | NASA | Consumer) #REQUIRED">
+<!ENTITY % Source "(NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML | IM | SGC | NCT | NRCBL) #REQUIRED">
+<!ENTITY % Status "(In-Process | Completed | Out-of-scope | PubMed-not-MEDLINE) #IMPLIED">
+<!-- ================================================================= -->
+<!-- This is the top level element for MedlineCitation -->
+<!ELEMENT MedlineCitation (%MedlineID.Ref;,
+                           %PMID.Ref;,
+                           %DateCreated.Ref;, 
+                           DateCompleted?, 
+                           DateRevised?,
+                           Article,
+                           MedlineJournalInfo, 
+                           ChemicalList?,
+                           CitationSubset*,
+                           CommentsCorrections?,
+                           GeneSymbolList?,
+                           MeshHeadingList?, 
+                           NumberOfReferences?,
+                           PersonalNameSubjectList?,
+                           OtherID*,
+                           OtherAbstract*,
+                           KeywordList*,
+                           SpaceFlightMission*,
+                           InvestigatorList?,
+                           GeneralNote*)>
+<!ATTLIST MedlineCitation Owner %Owner; "NLM" >
+<!ATTLIST MedlineCitation Status %Status; >
+<!-- End of MedlineCitation group -->
+<!-- ================================================================= -->
+<!--             Further Definition of NLM Tags         -->
+<!ELEMENT DateCreated (%normal.date;)>
+<!ELEMENT DateCompleted (%normal.date;)>
+<!ELEMENT DateRevised (%normal.date;)>
+<!ELEMENT MedlineID (#PCDATA)>
+<!ELEMENT OtherAbstract (%Abstract;)>
+<!ATTLIST OtherAbstract Type %Type; >
+<!ELEMENT KeywordList (Keyword+)>
+<!ATTLIST KeywordList Owner %Owner; "NLM" >
+<!ELEMENT Keyword (#PCDATA)>
+<!ATTLIST Keyword
+         MajorTopicYN (Y | N) "N" >
+<!ELEMENT SpaceFlightMission (#PCDATA)>
+<!ELEMENT OtherID (#PCDATA)>
+<!ATTLIST OtherID Source %Source; >
+<!ELEMENT InvestigatorList (Investigator+)>
+<!ELEMENT Investigator (%personal.name;,Affiliation?)>
+<!ELEMENT GeneralNote (#PCDATA)>
+<!ATTLIST GeneralNote Owner %Owner; "NLM">
+<!ELEMENT CitationSubset (#PCDATA)>
+<!ELEMENT ChemicalList (Chemical+)>
+<!ELEMENT Chemical ((RegistryNumber|CASRegistryNumber), NameOfSubstance)>
+<!ELEMENT RegistryNumber (#PCDATA)>
+<!ELEMENT CASRegistryNumber (#PCDATA)>
+<!ELEMENT NameOfSubstance (#PCDATA)>
+<!ELEMENT GeneSymbolList (GeneSymbol+)>
+<!ELEMENT GeneSymbol (#PCDATA)>
+<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT PersonalNameSubject (%personal.name;)>
+<!ELEMENT NumberOfReferences (#PCDATA)>
+<!ELEMENT CommentsCorrections (CommentOn*,
+                               CommentIn*,
+                               ErratumIn*, 
+                               ErratumFor*, 
+                               RepublishedFrom*,
+                               RepublishedIn*,
+                               RetractionOf*,
+                               RetractionIn*,
+                               UpdateIn*,
+                               UpdateOf*,
+                               SummaryForPatientsIn*,
+                               OriginalReportIn*)>
+<!ELEMENT CommentOn (%Ref.template;)>
+<!ELEMENT CommentIn (%Ref.template;)>
+<!ELEMENT ErratumIn (%Ref.template;)>
+<!ELEMENT ErratumFor (%Ref.template;)>
+<!ELEMENT RepublishedFrom (%Ref.template;)>
+<!ELEMENT RepublishedIn (%Ref.template;)>
+<!ELEMENT RetractionOf (%Ref.template;)>
+<!ELEMENT RetractionIn (%Ref.template;)>
+<!ELEMENT UpdateIn (%Ref.template;)>
+<!ELEMENT UpdateOf (%Ref.template;)>
+<!ELEMENT SummaryForPatientsIn (%Ref.template;)>
+<!ELEMENT OriginalReportIn (%Ref.template;)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedlinecitation_060101.dtd b/dtd/nlmmedlinecitation_060101.dtd
new file mode 100644
index 0000000..03ff193
--- /dev/null
+++ b/dtd/nlmmedlinecitation_060101.dtd
@@ -0,0 +1,103 @@
+<!-- NLMMedlineCitation DTD              
+ 
+     Comments and suggestions are welcome.
+     January 1, 2006
+
+     **See http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitation_070101.dtd for the forthcoming 
+     NLMMedlineCitation DTD dated January 1, 2007 for future use.**
+  
+   NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedlinecitation_060101.dtd:
+
+     a. Changed entity reference from "nlmsharedcatcit_041101.dtd" 
+             to: "nlmsharedcatcit_060101.dtd" 
+  
+     b.  Added values QCICL and QCIM to the Source internal entity
+
+
+    
+     Historic Revision notes for previous versions of NLMMedlineCitation DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_medlinecitation.html
+
+ -->
+<!-- ================================================================= -->
+<!-- internal DTD entities -->
+<!ENTITY % Owner "(NLM | NASA | PIP | KIE | HSR | HMD | SIS | NOTNLM)">
+<!ENTITY % Ref.template "(RefSource,
+                          PMID?, Note?)">
+<!ENTITY % PubModel "(Print | Print-Electronic | Electronic | Electronic-Print) #REQUIRED">
+<!ENTITY % Source "(NASA | KIE | PIP | POP | ARPL | CPC |
+                    IND | CPFH | CLML | IM | SGC | NRCBL | QCICL | QCIM) #REQUIRED">
+<!ENTITY % Status "(Completed | In-Process | PubMed-not-MEDLINE |
+                    In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED">
+<!ENTITY % Type "(AAMC | AIDS | KIE | PIP | NASA | Consumer) #REQUIRED">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM Common DTD via NLMSharedCatCit DTD is located  -->
+<!ENTITY % NlmSharedCatCit PUBLIC "-//NLM//DTD SharedCatCit, 1st January 2006//EN" 
+"nlmsharedcatcit_060101.dtd" >  
+%NlmSharedCatCit;
+<!-- =================================================================  -->
+<!-- This is the top level element for MedlineCitation -->
+<!ELEMENT MedlineCitation (%NlmDcmsID.Ref;, %PMID.Ref;, %DateCreated.Ref;, DateCompleted?,
+                           DateRevised?, Article, MedlineJournalInfo, ChemicalList?, 
+                           CitationSubset*, CommentsCorrections?, GeneSymbolList?, 
+                           MeshHeadingList?, NumberOfReferences?, PersonalNameSubjectList?,
+                           OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                           InvestigatorList?, GeneralNote*)>
+<!ATTLIST MedlineCitation
+	Owner %Owner; "NLM"
+	Status %Status;
+>
+<!ATTLIST Article
+          PubModel %PubModel;
+>
+<!-- End of MedlineCitation group -->
+<!-- ================================================================= -->
+<!--             Further Definition of NLM Tags         -->
+<!ELEMENT CitationSubset (#PCDATA)>
+<!ELEMENT CommentIn (%Ref.template;)>
+<!ELEMENT CommentOn (%Ref.template;)>
+<!ELEMENT CommentsCorrections (CommentOn*, CommentIn*, ErratumIn*, ErratumFor*,
+                               RepublishedFrom*, RepublishedIn*, RetractionOf*,
+                               RetractionIn*, UpdateIn*, UpdateOf*, 
+                               SummaryForPatientsIn*, OriginalReportIn*, ReprintOf*, ReprintIn*)>
+<!ELEMENT ErratumFor (%Ref.template;)>
+<!ELEMENT ErratumIn (%Ref.template;)>
+<!ATTLIST GeneralNote
+	Owner %Owner; "NLM"
+>
+<!ELEMENT GeneSymbol (#PCDATA)>
+<!ELEMENT GeneSymbolList (GeneSymbol+)>
+<!ELEMENT NlmDcmsID (#PCDATA)>
+<!ELEMENT Note (#PCDATA)>
+<!ELEMENT NumberOfReferences (#PCDATA)>
+<!ELEMENT OriginalReportIn (%Ref.template;)>
+<!ELEMENT RefSource (#PCDATA)>
+<!ELEMENT ReprintIn (%Ref.template;)>
+<!ELEMENT ReprintOf (%Ref.template;)>
+<!ELEMENT RepublishedFrom (%Ref.template;)>
+<!ELEMENT RepublishedIn (%Ref.template;)>
+<!ELEMENT RetractionIn (%Ref.template;)>
+<!ELEMENT RetractionOf (%Ref.template;)>
+<!ELEMENT SummaryForPatientsIn (%Ref.template;)>
+<!ELEMENT UpdateIn (%Ref.template;)>
+<!ELEMENT UpdateOf (%Ref.template;)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedlinecitation_070101.dtd b/dtd/nlmmedlinecitation_070101.dtd
new file mode 100644
index 0000000..35fc73d
--- /dev/null
+++ b/dtd/nlmmedlinecitation_070101.dtd
@@ -0,0 +1,104 @@
+<!-- NLMMedlineCitation DTD              
+ 
+     Comments and suggestions are welcome.
+     January 1, 2007
+     
+          
+   NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedlinecitation_070101.dtd:
+
+     a. Changed entity reference from "nlmsharedcatcit_060101.dtd" 
+             to: "nlmsharedcatcit_070101.dtd" 
+  
+     b.  Added PartialRetractionOf and PartialRetractionIn to the CommentsCorrections element
+
+
+    
+     Historic Revision notes for previous versions of NLMMedlineCitation DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_medlinecitation.html
+
+ -->
+<!-- ================================================================= -->
+<!-- internal DTD entities -->
+<!ENTITY % Owner "(NLM | NASA | PIP | KIE | HSR | HMD | SIS | NOTNLM)">
+<!ENTITY % Ref.template "(RefSource,
+                          PMID?, Note?)">
+<!ENTITY % PubModel "(Print | Print-Electronic | Electronic | Electronic-Print) #REQUIRED">
+<!ENTITY % Source "(NASA | KIE | PIP | POP | ARPL | CPC |
+                    IND | CPFH | CLML | IM | SGC | NRCBL | QCICL | QCIM) #REQUIRED">
+<!ENTITY % Status "(Completed | In-Process | PubMed-not-MEDLINE |
+                    In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED">
+<!ENTITY % Type "(AAMC | AIDS | KIE | PIP | NASA | Consumer) #REQUIRED">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM Common DTD via NLMSharedCatCit DTD is located  -->
+<!ENTITY % NlmSharedCatCit PUBLIC "-//NLM//DTD SharedCatCit, 1st January 2007//EN" 
+"nlmsharedcatcit_070101.dtd" >  
+%NlmSharedCatCit;
+<!-- =================================================================  -->
+<!-- This is the top level element for MedlineCitation -->
+<!ELEMENT MedlineCitation (%NlmDcmsID.Ref;, %PMID.Ref;, %DateCreated.Ref;, DateCompleted?,
+                           DateRevised?, Article, MedlineJournalInfo, ChemicalList?, 
+                           CitationSubset*, CommentsCorrections?, GeneSymbolList?, 
+                           MeshHeadingList?, NumberOfReferences?, PersonalNameSubjectList?,
+                           OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                           InvestigatorList?, GeneralNote*)>
+<!ATTLIST MedlineCitation
+	Owner %Owner; "NLM"
+	Status %Status;
+>
+<!ATTLIST Article
+          PubModel %PubModel;
+>
+<!-- End of MedlineCitation group -->
+<!-- ================================================================= -->
+<!--             Further Definition of NLM Tags         -->
+<!ELEMENT CitationSubset (#PCDATA)>
+<!ELEMENT CommentIn (%Ref.template;)>
+<!ELEMENT CommentOn (%Ref.template;)>
+<!ELEMENT CommentsCorrections (CommentOn*, CommentIn*, ErratumIn*, ErratumFor*,
+                               PartialRetractionIn*, PartialRetractionOf*,
+                               RepublishedFrom*, RepublishedIn*, RetractionOf*,
+                               RetractionIn*, UpdateIn*, UpdateOf*, 
+                               SummaryForPatientsIn*, OriginalReportIn*, ReprintOf*, ReprintIn*)>
+<!ELEMENT ErratumFor (%Ref.template;)>
+<!ELEMENT ErratumIn (%Ref.template;)>
+<!ATTLIST GeneralNote
+	Owner %Owner; "NLM"
+>
+<!ELEMENT GeneSymbol (#PCDATA)>
+<!ELEMENT GeneSymbolList (GeneSymbol+)>
+<!ELEMENT NlmDcmsID (#PCDATA)>
+<!ELEMENT Note (#PCDATA)>
+<!ELEMENT NumberOfReferences (#PCDATA)>
+<!ELEMENT OriginalReportIn (%Ref.template;)>
+<!ELEMENT PartialRetractionIn (%Ref.template;)>
+<!ELEMENT PartialRetractionOf (%Ref.template;)>
+<!ELEMENT RefSource (#PCDATA)>
+<!ELEMENT ReprintIn (%Ref.template;)>
+<!ELEMENT ReprintOf (%Ref.template;)>
+<!ELEMENT RepublishedFrom (%Ref.template;)>
+<!ELEMENT RepublishedIn (%Ref.template;)>
+<!ELEMENT RetractionIn (%Ref.template;)>
+<!ELEMENT RetractionOf (%Ref.template;)>
+<!ELEMENT SummaryForPatientsIn (%Ref.template;)>
+<!ELEMENT UpdateIn (%Ref.template;)>
+<!ELEMENT UpdateOf (%Ref.template;)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedlinecitation_080101.dtd b/dtd/nlmmedlinecitation_080101.dtd
new file mode 100644
index 0000000..670005a
--- /dev/null
+++ b/dtd/nlmmedlinecitation_080101.dtd
@@ -0,0 +1,107 @@
+<!-- NLMMedlineCitation DTD   
+
+     Comments and suggestions are welcome.
+     January 1, 2008
+     
+          
+   NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedlinecitation_080101.dtd:
+
+     a. Changed entity reference from "nlmsharedcatcit_070101.dtd" 
+             to: "nlmsharedcatcit_080101.dtd" 
+     
+     b. Added entity EIdType with doi and pii values
+  
+   
+  
+     Historic Revision notes for previous versions of NLMMedlineCitation DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_medlinecitation.html
+
+ -->
+<!-- ================================================================= -->
+<!-- external DTD entities -->
+<!ENTITY % EIdType "(doi | pii) #REQUIRED">
+<!-- ================================================================= -->
+<!-- internal DTD entities -->
+<!ENTITY % Owner "(NLM | NASA | PIP | KIE | HSR | HMD | SIS | NOTNLM)">
+<!ENTITY % Ref.template "(RefSource,
+                          PMID?, Note?)">
+<!ENTITY % PubModel "(Print | Print-Electronic | Electronic | Electronic-Print) #REQUIRED">
+<!ENTITY % Source "(NASA | KIE | PIP | POP | ARPL | CPC |
+                    IND | CPFH | CLML | IM | SGC | NRCBL | QCICL | QCIM) #REQUIRED">
+<!ENTITY % Status "(Completed | In-Process | PubMed-not-MEDLINE |
+                    In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED">
+<!ENTITY % Type "(AAMC | AIDS | KIE | PIP | NASA | Consumer) #REQUIRED">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM Common DTD via NLMSharedCatCit DTD is located  -->
+<!ENTITY % NlmSharedCatCit PUBLIC "-//NLM//DTD SharedCatCit, 1st January 2008//EN" 
+"nlmsharedcatcit_080101.dtd" >  
+%NlmSharedCatCit;
+<!-- =================================================================  -->
+<!-- This is the top level element for MedlineCitation -->
+<!ELEMENT MedlineCitation (%NlmDcmsID.Ref;, %PMID.Ref;, %DateCreated.Ref;, DateCompleted?,
+                           DateRevised?, Article, MedlineJournalInfo, ChemicalList?, 
+                           CitationSubset*, CommentsCorrections?, GeneSymbolList?, 
+                           MeshHeadingList?, NumberOfReferences?, PersonalNameSubjectList?,
+                           OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                           InvestigatorList?, GeneralNote*)>
+<!ATTLIST MedlineCitation
+	Owner %Owner; "NLM"
+	Status %Status;
+>
+<!ATTLIST Article
+          PubModel %PubModel;
+>
+<!-- End of MedlineCitation group -->
+<!-- ================================================================= -->
+<!--             Further Definition of NLM Tags         -->
+<!ELEMENT CitationSubset (#PCDATA)>
+<!ELEMENT CommentIn (%Ref.template;)>
+<!ELEMENT CommentOn (%Ref.template;)>
+<!ELEMENT CommentsCorrections (CommentOn*, CommentIn*, ErratumIn*, ErratumFor*,
+                               PartialRetractionIn*, PartialRetractionOf*,
+                               RepublishedFrom*, RepublishedIn*, RetractionOf*,
+                               RetractionIn*, UpdateIn*, UpdateOf*, 
+                               SummaryForPatientsIn*, OriginalReportIn*, ReprintOf*, ReprintIn*)>
+<!ELEMENT ErratumFor (%Ref.template;)>
+<!ELEMENT ErratumIn (%Ref.template;)>
+<!ATTLIST GeneralNote
+	Owner %Owner; "NLM"
+>
+<!ELEMENT GeneSymbol (#PCDATA)>
+<!ELEMENT GeneSymbolList (GeneSymbol+)>
+<!ELEMENT NlmDcmsID (#PCDATA)>
+<!ELEMENT Note (#PCDATA)>
+<!ELEMENT NumberOfReferences (#PCDATA)>
+<!ELEMENT OriginalReportIn (%Ref.template;)>
+<!ELEMENT PartialRetractionIn (%Ref.template;)>
+<!ELEMENT PartialRetractionOf (%Ref.template;)>
+<!ELEMENT RefSource (#PCDATA)>
+<!ELEMENT ReprintIn (%Ref.template;)>
+<!ELEMENT ReprintOf (%Ref.template;)>
+<!ELEMENT RepublishedFrom (%Ref.template;)>
+<!ELEMENT RepublishedIn (%Ref.template;)>
+<!ELEMENT RetractionIn (%Ref.template;)>
+<!ELEMENT RetractionOf (%Ref.template;)>
+<!ELEMENT SummaryForPatientsIn (%Ref.template;)>
+<!ELEMENT UpdateIn (%Ref.template;)>
+<!ELEMENT UpdateOf (%Ref.template;)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedlinecitation_090101.dtd b/dtd/nlmmedlinecitation_090101.dtd
new file mode 100644
index 0000000..1987031
--- /dev/null
+++ b/dtd/nlmmedlinecitation_090101.dtd
@@ -0,0 +1,112 @@
+<!-- NLMMedlineCitation DTD   
+     
+     Comments and suggestions are welcome.
+     January 1, 2009 v.2
+
+     **THIS IS THE FORTHCOMING DTD FOR 2009 NOT CURRENTLY IN USE.  
+     SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitation_080101.dtd FOR THE 
+     NLMMEDLINECITATION DTD DATED JANUARY 1, 2008 CURRENTLY IN USE.**  
+               
+   NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+       
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+  | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmmedlinecitation_090101.dtd:
+
+     a. Changed entity reference from "nlmsharedcatcit_080101.dtd" 
+             to: "nlmsharedcatcit_090101.dtd" 
+     
+     b. Moved entity Type to nlmcommon dtd
+
+     c. Added NLM value to entity Source
+ 
+     d. CHANGE WITHDRAWN FOR V.2: Delete entity NlmDcmsID.Ref
+   
+  
+     Historic Revision notes for previous versions of NLMMedlineCitation DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_medlinecitation.html
+
+ -->
+<!-- ================================================================= -->
+<!-- external DTD entities -->
+<!ENTITY % EIdType "(doi | pii) #REQUIRED">
+<!-- ================================================================= -->
+<!-- internal DTD entities -->
+<!ENTITY % Owner "(NLM | NASA | PIP | KIE | HSR | HMD | SIS | NOTNLM)">
+<!ENTITY % Ref.template "(RefSource,
+                          PMID?, Note?)">
+<!ENTITY % PubModel "(Print | Print-Electronic | Electronic | Electronic-Print) #REQUIRED">
+<!ENTITY % Source "(NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | 
+                    CLML | IM | SGC | NRCBL | QCICL | QCIM | NLM) #REQUIRED">
+<!ENTITY % Status "(Completed | In-Process | PubMed-not-MEDLINE |
+                    In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED">
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the NLM Common DTD via NLMSharedCatCit DTD is located  -->
+<!ENTITY % NlmSharedCatCit PUBLIC "-//NLM//DTD SharedCatCit, 1st January 2009//EN" 
+"nlmsharedcatcit_090101.dtd" >  
+%NlmSharedCatCit;
+<!-- =================================================================  -->
+<!-- This is the top level element for MedlineCitation -->
+<!ELEMENT MedlineCitation (%NlmDcmsID.Ref;, %PMID.Ref;, %DateCreated.Ref;, DateCompleted?,
+                           DateRevised?, Article, MedlineJournalInfo, ChemicalList?, 
+                           CitationSubset*, CommentsCorrections?, GeneSymbolList?, 
+                           MeshHeadingList?, NumberOfReferences?, PersonalNameSubjectList?,
+                           OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                           InvestigatorList?, GeneralNote*)>
+<!ATTLIST MedlineCitation
+	Owner %Owner; "NLM"
+	Status %Status;
+>
+<!ATTLIST Article
+          PubModel %PubModel;
+>
+<!-- End of MedlineCitation group -->
+<!-- ================================================================= -->
+<!--             Further Definition of NLM Tags         -->
+<!ELEMENT CitationSubset (#PCDATA)>
+<!ELEMENT CommentIn (%Ref.template;)>
+<!ELEMENT CommentOn (%Ref.template;)>
+<!ELEMENT CommentsCorrections (CommentOn*, CommentIn*, ErratumIn*, ErratumFor*,
+                               PartialRetractionIn*, PartialRetractionOf*,
+                               RepublishedFrom*, RepublishedIn*, RetractionOf*,
+                               RetractionIn*, UpdateIn*, UpdateOf*, 
+                               SummaryForPatientsIn*, OriginalReportIn*, ReprintOf*, ReprintIn*)>
+<!ELEMENT ErratumFor (%Ref.template;)>
+<!ELEMENT ErratumIn (%Ref.template;)>
+<!ATTLIST GeneralNote
+	Owner %Owner; "NLM"
+>
+<!ELEMENT GeneSymbol (#PCDATA)>
+<!ELEMENT GeneSymbolList (GeneSymbol+)>
+<!ELEMENT NlmDcmsID (#PCDATA)>
+<!ELEMENT Note (#PCDATA)>
+<!ELEMENT NumberOfReferences (#PCDATA)>
+<!ELEMENT OriginalReportIn (%Ref.template;)>
+<!ELEMENT PartialRetractionIn (%Ref.template;)>
+<!ELEMENT PartialRetractionOf (%Ref.template;)>
+<!ELEMENT RefSource (#PCDATA)>
+<!ELEMENT ReprintIn (%Ref.template;)>
+<!ELEMENT ReprintOf (%Ref.template;)>
+<!ELEMENT RepublishedFrom (%Ref.template;)>
+<!ELEMENT RepublishedIn (%Ref.template;)>
+<!ELEMENT RetractionIn (%Ref.template;)>
+<!ELEMENT RetractionOf (%Ref.template;)>
+<!ELEMENT SummaryForPatientsIn (%Ref.template;)>
+<!ELEMENT UpdateIn (%Ref.template;)>
+<!ELEMENT UpdateOf (%Ref.template;)>
+<!-- ================================================================= -->
diff --git a/dtd/nlmmedlinecitationset_100101.dtd b/dtd/nlmmedlinecitationset_100101.dtd
new file mode 100644
index 0000000..16fc7fa
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_100101.dtd
@@ -0,0 +1,194 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2010
+
+     **THIS IS THE FORTHCOMING DTD TO BE USED FOR MEDLINE/PUBMED DATA IN
+     2010 AND IS NOT CURRENTLY IN USE.  
+     SEE http://www.nlm.nih.gov/databases/dtd/ FOR LINKS TO THE SUITE OF 
+     DTDS DATED JANUARY 1, 2009 CURRENTLY IN USE.**
+
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. The nlmmedline_090101.dtd and nlmmedlinecitation_090101.dtd have 
+           been used as the base.
+        b. The nlmcommon and sharedcatcat external entities have been merged into 
+           this single DTD. All extraneous nlmcommon and sharedcatcit objects not 
+           required by MedlineCitationSet have been removed.
+        c. No internal DTD entity references are used.
+           All elements and attributes are defined explicitly in this DTD.
+        d. All unused and unmapped tags have been removed.
+        e. Removed Book subtree from Article.	
+        f. Removed HSR, HMD and SIS from KeywordList Owner.
+        g. Removed SIS from MedlineCitation Owner.
+        h. Removed SIS and NOTNLM from GeneralNote Owner. 
+        i. Removed IM,QCICL,QCIM and SGC from Source.
+        j. Removed Hour, Minute, and Second.
+        k. Removed DatesAssociatedWithName,NameQualifier,OtherInformation and
+           TitleAssociatedWithName from Author and PersonalNameSubject.
+        l. Removed PublicationInfo and its related elements.
+        m. Removed NCBIArticle.
+        n. Removed NlmDcmsID from MedlineCitation.
+        o. Removed Prefix attribute from OtherID.
+        p. Removed BroadJournalHeadingList,BroadJournalHeading,Coden,
+           CollectiveTitle,Coverage,FirstName,Frequency and MiddleName.
+        q. Reorganized CommentsCorrections to one main element with 
+           RefType attribute. RefType valid values were previously
+           element names under CommentsCorrections. Added Cites as new
+           RefType valid value.  
+        r. Added NameID to Author and Investigator elements.  
+
+
+-->
+<!-- ====================================================================== -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?, CitationSubset*, 
+                CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
+                NumberOfReferences?, PersonalNameSubjectList?, OtherID*, 
+                OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED>
+<!ELEMENT	Abstract (AbstractText,CopyrightInformation?)>
+<!ELEMENT	AbstractText (#PCDATA)>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation (#PCDATA)>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle (#PCDATA)>
+<!ELEMENT	Author ((LastName, ForeName?, Initials?, Suffix?, NameID*) | 
+                         (CollectiveName,NameID*))>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName (#PCDATA)>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST   CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName MajorTopicYN (Y | N) "N">
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+            ValidYN  (Y | N) "Y">
+<!ELEMENT   EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT   ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,NameID*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword (#PCDATA)>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NASA | PIP | KIE | NOTNLM) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT   MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+<!ELEMENT   NameID (#PCDATA)>
+<!ATTLIST   NameID 
+            Source (NCBI | Publisher | NISO | ISO) #REQUIRED >
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED>
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT   StartPage (#PCDATA)>
+<!ELEMENT	Suffix (#PCDATA)>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle (#PCDATA)>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_100301.dtd b/dtd/nlmmedlinecitationset_100301.dtd
new file mode 100644
index 0000000..e6b4c48
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_100301.dtd
@@ -0,0 +1,201 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2010
+
+     **THIS IS THE FORTHCOMING DTD TO BE USED FOR MEDLINE/PUBMED DATA IN
+     2010 AND IS NOT CURRENTLY IN USE.  
+     SEE http://www.nlm.nih.gov/databases/dtd/ FOR LINKS TO THE SUITE OF 
+     DTDS DATED JANUARY 1, 2009 CURRENTLY IN USE.**
+
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. The nlmmedline_090101.dtd and nlmmedlinecitation_090101.dtd have 
+           been used as the base.
+        b. The nlmcommon and sharedcatcat external entities have been merged into 
+           this single DTD. All extraneous nlmcommon and sharedcatcit objects not 
+           required by MedlineCitationSet have been removed.
+        c. No internal DTD entity references are used.
+           All elements and attributes are defined explicitly in this DTD.
+        d. All unused and unmapped tags have been removed.
+        e. Removed Book subtree from Article.	
+        f. Removed HSR, HMD and SIS from KeywordList Owner.
+        g. Removed SIS from MedlineCitation Owner.
+        h. Removed SIS and NOTNLM from GeneralNote Owner. 
+        i. Removed IM,QCICL,QCIM and SGC from Source.
+        j. Removed Hour, Minute, and Second.
+        k. Removed DatesAssociatedWithName,NameQualifier,OtherInformation and
+           TitleAssociatedWithName from Author and PersonalNameSubject.
+        l. Removed PublicationInfo and its related elements.
+        m. Removed NCBIArticle.
+        n. Removed NlmDcmsID from MedlineCitation.
+        o. Removed Prefix attribute from OtherID.
+        p. Removed BroadJournalHeadingList,BroadJournalHeading,Coden,
+           CollectiveTitle,Coverage,FirstName,Frequency and MiddleName.
+        q. Reorganized CommentsCorrections to one main element with 
+           RefType attribute. RefType valid values were previously
+           element names under CommentsCorrections. Added Cites as new
+           RefType valid value.  
+        r. Added NameID to Author and Investigator elements.  
+
+
+-->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?, CitationSubset*, 
+                CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
+                NumberOfReferences?, PersonalNameSubjectList?, OtherID*, 
+                OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED>
+<!ELEMENT	Abstract (AbstractText,CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?, NameID*) | 
+                         (CollectiveName,NameID*)), Affiliation?)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST   CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName MajorTopicYN (Y | N) "N">
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+            ValidYN  (Y | N) "Y">
+<!ELEMENT   EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT   ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,NameID*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NASA | PIP | KIE | NOTNLM) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT   MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+<!ELEMENT   NameID (#PCDATA)>
+<!ATTLIST   NameID 
+            Source (NCBI | Publisher | NISO | ISO) #REQUIRED >
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED>
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT   StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_110101.dtd b/dtd/nlmmedlinecitationset_110101.dtd
new file mode 100644
index 0000000..c520c6d
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_110101.dtd
@@ -0,0 +1,197 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2011
+  
+  **THIS IS THE FORTHCOMING DTD FOR 2011 NOT CURRENTLY IN USE.  
+    SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_100101.dtd
+    FOR THE NLMMedlineCitationSet DTD DATED JANUARY 1, 2010 CURRENTLY IN USE.**  
+     
+     
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. Changed nlmmedlinecitationset_100101.dtd to
+           nlmmedlinecitationset_110101.dtd. 
+        b. Added Label and NlmCategory attributes to AbstractText. 
+        c. Added element SupplMeshList to MedlineCitation.
+        d. Added element SupplMeshName with Type attribute to SupplMeshList.
+        e. Added Type attribute to DescriptorName.
+        f. Added VersionID and VersionDate attributes to MedlineCitation.
+        g. Added Version attribute to PMID.
+        h. Repositioned NameID element in Author.
+        i. Changed NameID Source attribute to unspecified values.
+        j. Added new Owner attribute valid value NLM-AUTO.
+
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?,SupplMeshList?,
+                CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?,
+                MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?,
+                OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED
+                VersionID CDATA #IMPLIED
+                VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+,CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST       AbstractText
+                Label CDATA #IMPLIED
+                NlmCategory (UNLABELLED | BACKGROUND | OBJECTIVE | METHODS |
+                             RESULTS | CONCLUSIONS) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | 
+                         CollectiveName),NameID*)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST   CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+                MajorTopicYN (Y | N) "N"
+                Type (Geographic) #IMPLIED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+            ValidYN  (Y | N) "Y">
+<!ELEMENT   EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT   ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,NameID*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT   MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+<!ELEMENT   NameID (#PCDATA)>
+<!ATTLIST   NameID 
+            Source CDATA #REQUIRED >
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED>
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST       PMID Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT       StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT       SupplMeshList (SupplMeshName+)>
+<!ELEMENT       SupplMeshName (#PCDATA)>
+<!ATTLIST       SupplMeshName Type (Disease | Protocol) #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_120101.dtd b/dtd/nlmmedlinecitationset_120101.dtd
new file mode 100644
index 0000000..6489a8c
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_120101.dtd
@@ -0,0 +1,188 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2012
+  
+    **THIS IS THE FORTHCOMING DTD FOR 2012 NOT CURRENTLY IN USE.  
+    SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_110101.dtd 
+    FOR THE NLMMedlineCitationSet DTD DATED JANUARY 1, 2011 CURRENTLY IN USE.**  
+     
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. Changed nlmmedlinecitationset_110101.dtd to
+           nlmmedlinecitationset_120101.dtd. 
+        b. Added new KeywordList Owner attribute valid value HHS.
+
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?,SupplMeshList?,
+                CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?,
+                MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?,
+                OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED
+                VersionID CDATA #IMPLIED
+                VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+,CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST       AbstractText
+                Label CDATA #IMPLIED
+                NlmCategory (UNLABELLED | BACKGROUND | OBJECTIVE | METHODS |
+                             RESULTS | CONCLUSIONS) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | 
+                         CollectiveName),NameID*)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST   CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+                MajorTopicYN (Y | N) "N"
+                Type (Geographic) #IMPLIED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+            ValidYN  (Y | N) "Y">
+<!ELEMENT   EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT   ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,NameID*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT   MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+<!ELEMENT   NameID (#PCDATA)>
+<!ATTLIST   NameID 
+            Source CDATA #REQUIRED >
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED>
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST       PMID Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT       StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT       SupplMeshList (SupplMeshName+)>
+<!ELEMENT       SupplMeshName (#PCDATA)>
+<!ATTLIST       SupplMeshName Type (Disease | Protocol) #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_130101.dtd b/dtd/nlmmedlinecitationset_130101.dtd
new file mode 100644
index 0000000..cda3746
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_130101.dtd
@@ -0,0 +1,191 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2013
+      
+     **THIS IS THE FORTHCOMING DTD FOR 2013 NOT CURRENTLY IN USE.  SEE        http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_120101.dtd 
+     FOR THE NLM MEDLINECITATIONSET DTD DATED JANUARY 1, 2012 CURRENTLY IN USE.**    
+    
+         
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. Changed nlmmedlinecitationset_120101.dtd to
+           nlmmedlinecitationset_130101.dtd. 
+        b. Added Language attribute to OtherAbstract. 
+        c. Changed NameID Element to Identifier Element.
+
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?,SupplMeshList?,
+                CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?,
+                MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?,
+                OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED
+                VersionID CDATA #IMPLIED
+                VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+,CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST       AbstractText
+                Label CDATA #IMPLIED
+                NlmCategory (UNLABELLED | BACKGROUND | OBJECTIVE | METHODS |
+                             RESULTS | CONCLUSIONS) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | 
+                         CollectiveName),Identifier*)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST       CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+                MajorTopicYN (Y | N) "N"
+                Type (Geographic) #IMPLIED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+                ValidYN  (Y | N) "Y">
+<!ELEMENT       EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT       Identifier (#PCDATA)>
+<!ATTLIST       Identifier 
+                Source CDATA #REQUIRED >
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT       ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,Identifier*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT       MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED
+                              Language CDATA "eng">
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST       PMID Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT       StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT       SupplMeshList (SupplMeshName+)>
+<!ELEMENT       SupplMeshName (#PCDATA)>
+<!ATTLIST       SupplMeshName Type (Disease | Protocol) #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_130501.dtd b/dtd/nlmmedlinecitationset_130501.dtd
new file mode 100644
index 0000000..9566d38
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_130501.dtd
@@ -0,0 +1,191 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2013
+      
+     **THIS IS THE FORTHCOMING DTD FOR 2013 NOT CURRENTLY IN USE.  SEE        http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_120101.dtd 
+     FOR THE NLM MEDLINECITATIONSET DTD DATED JANUARY 1, 2012 CURRENTLY IN USE.**    
+    
+         
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. Changed nlmmedlinecitationset_120101.dtd to
+           nlmmedlinecitationset_130101.dtd. 
+        b. Added Language attribute to OtherAbstract. 
+        c. Changed NameID Element to Identifier Element.
+
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?,SupplMeshList?,
+                CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?,
+                MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?,
+                OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED
+                VersionID CDATA #IMPLIED
+                VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+,CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST       AbstractText
+                Label CDATA #IMPLIED
+                NlmCategory (UNLABELLED | BACKGROUND | OBJECTIVE | METHODS |
+                             RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print | Electronic-eCollection) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | 
+                         CollectiveName),Identifier*)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST       CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+                MajorTopicYN (Y | N) "N"
+                Type (Geographic) #IMPLIED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+                ValidYN  (Y | N) "Y">
+<!ELEMENT       EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT       Identifier (#PCDATA)>
+<!ATTLIST       Identifier 
+                Source CDATA #REQUIRED >
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT       ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,Identifier*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT       MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED
+                              Language CDATA "eng">
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST       PMID Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT       StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT       SupplMeshList (SupplMeshName+)>
+<!ELEMENT       SupplMeshName (#PCDATA)>
+<!ATTLIST       SupplMeshName Type (Disease | Protocol) #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_140101.dtd b/dtd/nlmmedlinecitationset_140101.dtd
new file mode 100644
index 0000000..d8238d9
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_140101.dtd
@@ -0,0 +1,190 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2014
+     
+    ****THIS IS THE FORTHCOMING DTD FOR 2014 NOT CURRENTLY IN USE.  
+SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_130501.dtd FOR THE NLMMedlineCitationSet DTD DATED MAY 1, 2013 CURRENTLY IN USE.**
+         
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo)).  
+
+     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
+     and Investigator elements are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+        a. Changed nlmmedlinecitationset_130501.dtd to nlmmedlinecitationset_140101.dtd. 
+        b. Moved Affiliation element from Article to Author element.
+     
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!-- ================================================================= -->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
+                Article, MedlineJournalInfo, ChemicalList?,SupplMeshList?,
+                CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?,
+                MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?,
+                OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
+                InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE | 
+                        In-Data-Review | Publisher | MEDLINE | 
+                        OLDMEDLINE) #REQUIRED
+                VersionID CDATA #IMPLIED
+                VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+,CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST       AbstractText
+                Label CDATA #IMPLIED
+                NlmCategory (UNLABELLED | BACKGROUND | OBJECTIVE | METHODS |
+                             RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
+                        ELocationID+),Abstract?, AuthorList?, 
+                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
+                        VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+                PubModel (Print | Print-Electronic | Electronic | 
+                          Electronic-Print | Electronic-eCollection) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | 
+                         CollectiveName),Identifier*,Affiliation?)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST       CommentsCorrections 
+                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
+                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
+                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
+                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
+                ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+                MajorTopicYN (Y | N) "N"
+                Type (Geographic) #IMPLIED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+                ValidYN  (Y | N) "Y">
+<!ELEMENT       EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT       Identifier (#PCDATA)>
+<!ATTLIST       Identifier 
+                Source CDATA #REQUIRED >
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT       ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,Identifier*,Affiliation?)>
+<!ATTLIST	Investigator ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
+<!ELEMENT       MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+,CopyrightInformation?)>
+<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
+                                    NASA | Publisher) #REQUIRED
+                              Language CDATA "eng">
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
+                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST       PMID Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT       StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT       SupplMeshList (SupplMeshName+)>
+<!ELEMENT       SupplMeshName (#PCDATA)>
+<!ATTLIST       SupplMeshName Type (Disease | Protocol) #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_150101.dtd b/dtd/nlmmedlinecitationset_150101.dtd
new file mode 100644
index 0000000..2d90743
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_150101.dtd
@@ -0,0 +1,189 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2015
+     
+    **THIS IS THE FORTHCOMING DTD FOR 2015 NOT CURRENTLY IN USE.  SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_140101.dtd FOR THE NLMMedlineCitationSet DTD DATED JANUARY 1, 2014 CURRENTLY IN USE.**  
+         
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo).  
+
+     NOTE:  StartPage and EndPage in Pagination element are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+a. Changed nlmmedlinecitationset_140101.dtd to nlmmedlinecitationset_150101.dtd. 
+b. Added UI attribute to DescriptorName, QualifierName, NameOfSubstance, SupplMeshName and PublicationType elements.
+c. Added new element AffiliationInfo to Author and Investigator elements.
+d. Moved Affliliation and Identifier elements to new optional and repeatable envelope element AffiliationInfo.
+e. Removed AbstractText NlmCategory attribute valid value UNLABELLED.
+f. Added new CommentsCorrections RefType attribute valid values AssociatedDataset and AssociatedPublication. 
+                    
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!ENTITY % format	" b | i | sup | sub | u " >
+<!ENTITY % text             "(#PCDATA | %format;)*" >
+<!ELEMENT b		%text; > <!-- bold -->
+<!ELEMENT i		%text; > <!-- italic -->
+<!ELEMENT sup	%text; > <!-- superscript -->
+<!ELEMENT sub	%text; > <!-- subscript -->
+<!ELEMENT u		%text; > <!-- underline -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?, Article, MedlineJournalInfo, ChemicalList?, SupplMeshList?,CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?, OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+		Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE |  In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED 
+		VersionID CDATA #IMPLIED
+		VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+, CopyrightInformation?)>
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST	AbstractText
+		Label CDATA #IMPLIED
+		NlmCategory (BACKGROUND | OBJECTIVE | METHODS | RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation %text;>
+<!ELEMENT	AffiliationInfo (Affiliation, Identifier*)>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | ELocationID+),Abstract?,AuthorList?, Language+, DataBankList?, GrantList?,PublicationTypeList, VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+		PubModel (Print | Print-Electronic | Electronic | Electronic-Print | Electronic-eCollection) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle %text;>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName), Identifier*, AffiliationInfo*)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName %text;>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST	CommentsCorrections 
+		RefType (AssociatedDataset | AssociatedPublication | CommentOn | CommentIn | ErratumIn | ErratumFor | PartialRetractionIn | PartialRetractionOf | RepublishedFrom | RepublishedIn | RetractionOf | RetractionIn | UpdateIn | UpdateOf | SummaryForPatientsIn | OriginalReportIn | ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+		MajorTopicYN (Y | N) "N"
+		Type (Geographic) #IMPLIED
+		UI CDATA #REQUIRED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+		ValidYN  (Y | N) "Y">
+<!ELEMENT	EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote
+		Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT	Identifier (#PCDATA)>
+<!ATTLIST	Identifier 
+		Source CDATA #REQUIRED >
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN 
+		IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT	ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName, ForeName?, Initials?, Suffix?, Identifier*, AffiliationInfo*)>
+<!ATTLIST	Investigator 
+		ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue 
+		CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword 
+		MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList 
+		Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?, ISSNLinking?)>
+<!ELEMENT	MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ATTLIST	NameOfSubstance 
+		UI CDATA #REQUIRED>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+, CopyrightInformation?)>
+<!ATTLIST	OtherAbstract 
+		Type (AAMC | AIDS | KIE | PIP | NASA | Publisher) #REQUIRED
+		Language CDATA "eng">
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID 
+		Source (NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST	PMID 
+		Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName, ForeName?, Initials?, Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ATTLIST	PublicationType 
+		UI CDATA #REQUIRED>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName 
+		MajorTopicYN (Y | N) "N"
+		UI CDATA #REQUIRED>
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT	StartPage (#PCDATA)>
+<!ELEMENT	Suffix %text;>
+<!ELEMENT	SupplMeshList (SupplMeshName+)>
+<!ELEMENT	SupplMeshName (#PCDATA)>
+<!ATTLIST	SupplMeshName 
+		Type (Disease | Protocol) #REQUIRED
+		UI CDATA #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle %text;>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmmedlinecitationset_160101.dtd b/dtd/nlmmedlinecitationset_160101.dtd
new file mode 100644
index 0000000..0be6562
--- /dev/null
+++ b/dtd/nlmmedlinecitationset_160101.dtd
@@ -0,0 +1,180 @@
+<!-- NLM MedlineCitationSet DTD
+
+     This is the DTD which NLM has written for Internal and External Use.
+     January 1, 2016
+     
+    **THIS IS THE FORTHCOMING DTD FOR 2016 NOT CURRENTLY IN USE.**
+    *SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitationset_150101.dtd FOR THE NLM MedlineCitationSet DTD DATED JANUARY 1, 2015 CURRENTLY IN USE.*
+	
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported. 
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has
+     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
+     MedlineTA, MedlineJournalInfo).  
+
+     NOTE:  StartPage and EndPage in Pagination element are not currently used; are reserved for future use.  
+                
+
+        * = 0 or more occurrences (optional element, repeatable)
+        ? = 0 or 1 occurrences (optional element, at most 1)
+        + = 1 or more occurrences (required element, repeatable)
+        | = choice, one or the other but not both
+        no symbol = required element
+-->
+
+<!-- ================================================================= -->
+<!--             Revision Notes Section
+
+  The following changes were made:
+  
+a. Changed nlmmedlinecitationset_150101.dtd to nlmmedlinecitationset_160101.dtd. 
+b. Added a valid value of "QCIM" for the Source attribute of the OtherID element. A value of QCIM indicates that the identifier came from the Quarterly Cumulative Index Medicus. 
+                    
+See http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmmedline.html for historic Revision Notes for previous versions of NLMMedlineCitationSet DTD.
+-->
+<!-- ====================================================================== -->
+<!-- ================================================================= -->
+<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
+<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?, Article, MedlineJournalInfo, ChemicalList?, SupplMeshList?,CitationSubset*, CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?,NumberOfReferences?, PersonalNameSubjectList?, OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+		Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE |  In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED 
+		VersionID CDATA #IMPLIED
+		VersionDate CDATA #IMPLIED>
+<!ELEMENT	Abstract (AbstractText+, CopyrightInformation?)>
+<!ELEMENT	AbstractText (#PCDATA)>
+<!ATTLIST	AbstractText
+		Label CDATA #IMPLIED
+		NlmCategory (BACKGROUND | OBJECTIVE | METHODS | RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED>
+<!ELEMENT	AccessionNumber (#PCDATA)>
+<!ELEMENT	AccessionNumberList (AccessionNumber+)>
+<!ELEMENT	Acronym (#PCDATA)>
+<!ELEMENT	Affiliation (#PCDATA)>
+<!ELEMENT	AffiliationInfo (Affiliation, Identifier*)>
+<!ELEMENT	Agency (#PCDATA)>
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | ELocationID+),Abstract?,AuthorList?, Language+, DataBankList?, GrantList?,PublicationTypeList, VernacularTitle?, ArticleDate*)>
+<!ATTLIST	Article 
+		PubModel (Print | Print-Electronic | Electronic | Electronic-Print | Electronic-eCollection) #REQUIRED>
+<!ELEMENT	ArticleDate (Year,Month,Day)>
+<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
+<!ELEMENT	ArticleTitle (#PCDATA)>
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName), Identifier*, AffiliationInfo*)>
+<!ATTLIST	Author ValidYN (Y | N) "Y">
+<!ELEMENT	AuthorList (Author+)>
+<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
+<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
+<!ELEMENT	ChemicalList (Chemical+)>
+<!ELEMENT	CitationSubset (#PCDATA)>
+<!ELEMENT	CollectiveName (#PCDATA)>
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
+<!ATTLIST	CommentsCorrections 
+		RefType (AssociatedDataset | AssociatedPublication | CommentOn | CommentIn | ErratumIn | ErratumFor | PartialRetractionIn | PartialRetractionOf | RepublishedFrom | RepublishedIn | RetractionOf | RetractionIn | UpdateIn | UpdateOf | SummaryForPatientsIn | OriginalReportIn | ReprintOf | ReprintIn | Cites) #REQUIRED >
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
+<!ELEMENT	CopyrightInformation (#PCDATA)>
+<!ELEMENT	Country (#PCDATA)>
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
+<!ELEMENT	DataBankList (DataBank+)>
+<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
+<!ELEMENT	DataBankName (#PCDATA)>
+<!ELEMENT	DateCompleted (Year,Month,Day)>
+<!ELEMENT	DateCreated (Year,Month,Day)>
+<!ELEMENT	DateRevised (Year,Month,Day)>
+<!ELEMENT	Day (#PCDATA)>
+<!ELEMENT	DescriptorName (#PCDATA)>
+<!ATTLIST	DescriptorName 
+		MajorTopicYN (Y | N) "N"
+		Type (Geographic) #IMPLIED
+		UI CDATA #REQUIRED>
+<!ELEMENT	ELocationID (#PCDATA)>
+<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
+		ValidYN  (Y | N) "Y">
+<!ELEMENT	EndPage (#PCDATA)>
+<!ELEMENT	ForeName (#PCDATA)>
+<!ELEMENT	GeneSymbol (#PCDATA)>
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+<!ELEMENT	GeneralNote (#PCDATA)>
+<!ATTLIST	GeneralNote
+		Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+<!ELEMENT	GrantID (#PCDATA)>
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
+<!ELEMENT	Identifier (#PCDATA)>
+<!ATTLIST	Identifier 
+		Source CDATA #REQUIRED >
+<!ELEMENT	ISOAbbreviation (#PCDATA)>
+<!ELEMENT	ISSN (#PCDATA)>
+<!ATTLIST	ISSN 
+		IssnType  (Electronic | Print) #REQUIRED>
+<!ELEMENT	ISSNLinking (#PCDATA)>
+<!ELEMENT	Initials (#PCDATA)>
+<!ELEMENT	Investigator (LastName, ForeName?, Initials?, Suffix?, Identifier*, AffiliationInfo*)>
+<!ATTLIST	Investigator 
+		ValidYN (Y | N) "Y">
+<!ELEMENT	InvestigatorList (Investigator+)>
+<!ELEMENT	Issue (#PCDATA)>
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
+<!ATTLIST	JournalIssue 
+		CitedMedium (Internet | Print) #REQUIRED>
+<!ELEMENT	Keyword (#PCDATA)>
+<!ATTLIST	Keyword 
+		MajorTopicYN (Y | N) "N">
+<!ELEMENT	KeywordList (Keyword+)>
+<!ATTLIST	KeywordList 
+		Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM">
+<!ELEMENT	Language (#PCDATA)>
+<!ELEMENT	LastName (#PCDATA)>
+<!ELEMENT	MedlineDate (#PCDATA)>
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?, ISSNLinking?)>
+<!ELEMENT	MedlinePgn (#PCDATA)>
+<!ELEMENT	MedlineTA (#PCDATA)>
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+<!ELEMENT	Month (#PCDATA)>
+<!ELEMENT	NameOfSubstance (#PCDATA)>
+<!ATTLIST	NameOfSubstance 
+		UI CDATA #REQUIRED>
+<!ELEMENT	NlmUniqueID (#PCDATA)>
+<!ELEMENT	Note (#PCDATA)>
+<!ELEMENT	NumberOfReferences (#PCDATA)>
+<!ELEMENT	OtherAbstract (AbstractText+, CopyrightInformation?)>
+<!ATTLIST	OtherAbstract 
+		Type (AAMC | AIDS | KIE | PIP | NASA | Publisher) #REQUIRED
+		Language CDATA "eng">
+<!ELEMENT	OtherID (#PCDATA)>
+<!ATTLIST	OtherID 
+		Source (NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML | NRCBL | NLM | QCIM) #REQUIRED>
+<!ELEMENT	PMID (#PCDATA)>
+<!ATTLIST	PMID 
+		Version CDATA #REQUIRED>
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
+<!ELEMENT	PersonalNameSubject (LastName, ForeName?, Initials?, Suffix?)>
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
+<!ELEMENT	PublicationType (#PCDATA)>
+<!ATTLIST	PublicationType 
+		UI CDATA #REQUIRED>
+<!ELEMENT	PublicationTypeList (PublicationType+)>
+<!ELEMENT	QualifierName (#PCDATA)>
+<!ATTLIST	QualifierName 
+		MajorTopicYN (Y | N) "N"
+		UI CDATA #REQUIRED>
+<!ELEMENT	RefSource (#PCDATA)>
+<!ELEMENT	RegistryNumber (#PCDATA)>
+<!ELEMENT	Season (#PCDATA)>
+<!ELEMENT	SpaceFlightMission (#PCDATA)>
+<!ELEMENT	StartPage (#PCDATA)>
+<!ELEMENT	Suffix (#PCDATA)>
+<!ELEMENT	SupplMeshList (SupplMeshName+)>
+<!ELEMENT	SupplMeshName (#PCDATA)>
+<!ATTLIST	SupplMeshName 
+		Type (Disease | Protocol) #REQUIRED
+		UI CDATA #REQUIRED>
+<!ELEMENT	Title (#PCDATA)>
+<!ELEMENT	VernacularTitle (#PCDATA)>
+<!ELEMENT	Volume (#PCDATA)>
+<!ELEMENT	Year (#PCDATA)>
+<!ELEMENT	DeleteCitation (PMID+)>
diff --git a/dtd/nlmserials_080101.dtd b/dtd/nlmserials_080101.dtd
new file mode 100644
index 0000000..c5781d8
--- /dev/null
+++ b/dtd/nlmserials_080101.dtd
@@ -0,0 +1,134 @@
+<!-- NLM Serials DTD
+                  
+
+       Comments and suggestions are welcome.
+       January 1, 2008
+
+       SEE http://www.nlm.nih.gov/databases/dtd/nlmserials_090101.dtd FOR THE
+       FORTHCOMING NLMSERIALS DTD DATED JANUARY 1, 2009 FOR FUTURE USE.
+
+
+       This is the DTD which the U.S. National Library of Medicine 
+       has written for External Use. 
+       
+
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported.  
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has 
+     retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+     MedlineJournalInfo)).  
+
+
+                
+           
+
+* = 0 or more occurrences (optional element, repeatable)
+? = 0 or 1 occurrences (optional element, at most 1)
++ = 1 or more occurrences (required element, repeatable)
+| = choice, one or the other but not both 
+no symbol = required element
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+
+  The following changes were made in the nlmserials_080101.dtd:
+  
+       a.  Changed entity reference from "nlmcommon_070101.dtd"
+           to: "nlmcommon_080101.dtd"
+  
+       b.  Added elements ISSNLinking, CurrentlyIndexedForSubset, PMCHoldings 
+           and PMCEmbargo to Serial element
+
+       c.  Added PMC attribute to Serial element
+
+       d.  Added CurrentSubset and CurrentIndexingTreatment attribute to 
+           CurrentlyIndexedForSubset element
+
+       e.  Added value of S to XrType attribute in CrossReference element
+
+       f.  Added EIdType entity with doi and url values 
+  
+       g.  Removed value of G from CitationSubset
+  
+      
+-->
+<!-- ============================================================= -->
+<!--  external DTD entities   -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle?">
+<!ENTITY % EIdType "(doi | url) #REQUIRED">
+<!ENTITY % ISSN.Ref "ISSN*">
+<!ENTITY % PubDate.Ref "PubDate?">
+<!ENTITY % GrantID.Ref "GrantID?">
+<!ENTITY % Acronym.Ref "Acronym?">
+<!ENTITY % Agency.Ref "Agency?">
+<!ENTITY % DatedCreated.Ref "DateCreated">
+<!ENTITY % PublicationType.Ref  "PublicationTypeList">
+<!-- ============================================================== -->
+<!-- ====================================================================== -->
+<!-- internal DTD entities -->
+<!ENTITY % NlmUniqueID.Ref "NlmUniqueID">
+<!-- ====================================================================== -->
+<!-- Reference to Where the NLMCOMMON DTD is located  -->
+<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 1st January 2008//EN" 
+"nlmcommon_080101.dtd" > 
+%NlmCommon;
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!ELEMENT SerialsSet (Serial+)>
+<!-- ================================================================= -->
+<!-- This is the top level element for Serial -->
+<!ELEMENT Serial (%NlmUniqueID.Ref;, Title, MedlineTA?, PublicationInfo?, 
+                  %ISSN.Ref;,ISSNLinking?,ISOAbbreviation?, Language*,
+                  AcidFreeYN?, Coden?, ContinuationNotes?, CurrentFormatStatus?, 
+                  MinorTitleChangeYN?, IndexingHistoryList?, CurrentlyIndexedYN?,
+                  CurrentlyIndexedForSubset*, IndexOnlineYN?, IndexingSubset?, 
+                  PMCHoldings?, PMCEmbargo?, BroadJournalHeadingList?, 
+                  CrossReferenceList?, SortSerialName, IlsCreatedTimestamp?,
+                  IlsUpdatedTimestamp?,DeletedTimestamp?)>
+<!ATTLIST Serial
+         DataCreationMethod (P | K | O) #IMPLIED
+         PMC (Yes | Forthcoming) #IMPLIED
+>
+<!-- End of Serial group -->
+<!-- ================================================================= -->
+<!--        Further Definition of NLM Tags                     -->
+<!ELEMENT AcidFreeYN (#PCDATA)>
+<!ELEMENT ContinuationNotes (#PCDATA)>
+<!ELEMENT CoverageNote (#PCDATA)>
+<!ELEMENT CrossReference (XrTitle)>
+<!ATTLIST CrossReference
+	XrType (A | X | S) #REQUIRED
+>
+<!ELEMENT CrossReferenceList (CrossReference+)>
+<!ELEMENT CurrentFormatStatus (#PCDATA)>
+<!ELEMENT CurrentlyIndexedForSubset (#PCDATA)>
+<!ATTLIST CurrentlyIndexedForSubset
+        CurrentSubset  (AIM | D | E | H | IM | K | N | Q | QIS | S | T | X) #REQUIRED
+        CurrentIndexingTreatment (Full | Selective) #REQUIRED
+>
+<!ELEMENT CurrentlyIndexedYN (#PCDATA)>
+<!ELEMENT DateOfAction (%normal.date;)>
+<!ELEMENT DeletedTimestamp (%normal.date;)>
+<!ELEMENT IlsCreatedTimestamp (%normal.date;)>
+<!ELEMENT IlsUpdatedTimestamp (%normal.date;)>
+<!ELEMENT IndexingHistory (DateOfAction,Coverage?,CoverageNote?)>
+<!ATTLIST IndexingHistory
+          CitationSubset (AIM | B | C | D | E | F | H | IM | 
+                         J | K | N | OM | P | Q | QIS | R | S | T | X) #REQUIRED
+          IndexingTreatment %IndexingTreatment; 
+          IndexingStatus  %IndexingStatus;
+>
+<!ELEMENT IndexingHistoryList (IndexingHistory+)>
+<!ELEMENT IndexingSubset (#PCDATA)>
+<!ELEMENT IndexOnlineYN (#PCDATA) >
+<!ELEMENT MinorTitleChangeYN (#PCDATA)>
+<!ELEMENT PMCEmbargo (#PCDATA)>
+<!ELEMENT PMCHoldings (#PCDATA)>
+<!ELEMENT SortSerialName (#PCDATA)>
+<!ELEMENT XrTitle (#PCDATA)>
+<!-- This is the end for Serial -->
+<!-- ================================================================= -->
diff --git a/dtd/nlmserials_100101.dtd b/dtd/nlmserials_100101.dtd
new file mode 100644
index 0000000..87c1dc2
--- /dev/null
+++ b/dtd/nlmserials_100101.dtd
@@ -0,0 +1,157 @@
+<!-- NLM Serials DTD
+                  
+
+       Comments and suggestions are welcome.
+       January 1, 2010
+              
+       This is the DTD which the U.S. National Library of Medicine 
+       has written for Internal and External Use. 
+
+     SEE http://www.nlm.nih.gov/databases/dtd/nlmserials_110101.dtd 
+   FOR THE FORTHCOMING NLM SERIALS DTD DATED JANUARY 1, 2011 FOR FUTURE USE. 
+       
+    
+    
+     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+     XML elements were first created, MEDLINE records were the only data exported.  
+     Now NLM exports citations other than MEDLINE records using these tools. To 
+     minimize unnecessary disruption to users of the data and tools, NLM has 
+     retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+     MedlineJournalInfo).  
+    
+* = 0 or more occurrences (optional element, repeatable)
+? = 0 or 1 occurrences (optional element, at most 1)
++ = 1 or more occurrences (required element, repeatable)
+| = choice, one or the other but not both 
+no symbol = required element
+
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+
+  The following changes were made in the nlmserials_090101.dtd:
+  
+       a.  The nlmserials dtd has been used as a base.
+       b.  The nlmcommon and sharedcatcit external entities have been merged 
+           into this DTD.
+       c.  No internal DTD entity references are used.
+       d.  Removed PlaceCode, Imprint, ProjectedPublicationDate,
+           Edition and DateOfSerialPublication from PublicationInfo.
+       e.  Removed element LastName.
+       f.  Added MeshHeadingList, DescriptorName and QualifierName.
+       g.  Added IndexingSourceList and IndexingSourceName.
+
+       
+-->
+<!-- ============================================================= -->
+<!ELEMENT SerialsSet (Serial+)>
+<!ELEMENT Serial (NlmUniqueID, Title, MedlineTA?, PublicationInfo?, ISSN*, 
+                  ISSNLinking?, ISOAbbreviation?, Language*, AcidFreeYN?,
+                  Coden?, ContinuationNotes?, CurrentFormatStatus?, 
+                  MinorTitleChangeYN?, IndexingHistoryList?, 
+                  IndexingSourceList?, CurrentlyIndexedYN?,
+                  CurrentlyIndexedForSubset*, IndexOnlineYN?, 
+                  IndexingSubset?, ReportedMedlineYN, PMCHoldings?, 
+                  PMCEmbargo?, BroadJournalHeadingList?, MeshHeadingList?,
+                  CrossReferenceList?, SortSerialName, IlsCreatedTimestamp?,
+                  IlsUpdatedTimestamp?, DeletedTimestamp?)>
+<!ATTLIST Serial
+	DataCreationMethod (P | K | O) #IMPLIED
+	PMC (Yes | Forthcoming) #IMPLIED
+	Status (NLMCollection | NotNLMCollection) #REQUIRED
+>
+<!ELEMENT AcidFreeYN (#PCDATA)>
+<!ELEMENT BroadJournalHeading (#PCDATA)>
+<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
+<!ELEMENT Coden (#PCDATA)>
+<!ELEMENT ContinuationNotes (#PCDATA)>
+<!ELEMENT Country (#PCDATA)>
+<!ELEMENT Coverage (#PCDATA)>
+<!ELEMENT CoverageNote (#PCDATA)>
+<!ELEMENT CrossReference (XrTitle)>
+<!ATTLIST CrossReference
+	XrType (A | X | S) #REQUIRED
+>
+<!ELEMENT CrossReferenceList (CrossReference+)>
+<!ELEMENT CurrentFormatStatus (#PCDATA)>
+<!ELEMENT CurrentlyIndexedForSubset (#PCDATA)>
+<!ATTLIST CurrentlyIndexedForSubset
+	CurrentSubset (AIM | D | E | H | IM | K | N | Q | QIS | S | T | X) #REQUIRED
+	CurrentIndexingTreatment (Full | Selective) #REQUIRED
+>
+<!ELEMENT CurrentlyIndexedYN (#PCDATA)>
+<!ELEMENT DateOfAction (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ELEMENT DatesOfSerialPublication (#PCDATA)>
+<!ELEMENT Day (#PCDATA)>
+<!ELEMENT DeletedTimestamp (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ELEMENT DescriptorName (#PCDATA)>
+<!ATTLIST DescriptorName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT Frequency (#PCDATA)>
+<!ATTLIST Frequency
+	FrequencyType (Current | Former) "Current"
+>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT ISOAbbreviation (#PCDATA)>
+<!ELEMENT ISSN (#PCDATA)>
+<!ATTLIST ISSN
+	IssnType (Electronic | Print | Undetermined) #REQUIRED
+>
+<!ELEMENT ISSNLinking (#PCDATA)>
+<!ELEMENT IlsCreatedTimestamp (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ELEMENT IlsUpdatedTimestamp (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ELEMENT IndexOnlineYN (#PCDATA)>
+<!ELEMENT IndexingHistory (DateOfAction, Coverage?, CoverageNote?)>
+<!ATTLIST IndexingHistory
+	CitationSubset (AIM | B | C | D | E | F | H | IM | J | K | N | 
+                        OM | P | Q | QIS | R | S | T | X) #REQUIRED
+	IndexingTreatment (Unknown | Full | Selective | ReferencedIn |
+                           ReferencedInNoDetails) #IMPLIED
+	IndexingStatus (Ceased-publication | Continued-by-another-indexed-title | 
+                        Currently-indexed | Currently-indexed-Title-changed | 
+                        Date-range-of-indexed-citations-unspecified | 
+	                Deselected) #IMPLIED
+>
+<!ELEMENT IndexingHistoryList (IndexingHistory+)>
+<!ELEMENT IndexingSource (IndexingSourceName, Coverage?)>
+<!ELEMENT IndexingSourceList (IndexingSource+)>
+<!ELEMENT IndexingSourceName (#PCDATA)>
+<!ATTLIST IndexingSourceName
+	IndexingTreatment (Unknown | Full | Selective | ReferencedIn |
+                           ReferencedInNoDetails) #IMPLIED
+	IndexingStatus (Ceased-publication | Continued-by-another-indexed-title | 
+                        Currently-indexed | Currently-indexed-Title-changed | 
+                        Date-range-of-indexed-citations-unspecified | 
+                        Deselected) #IMPLIED
+>
+<!ELEMENT IndexingSubset (#PCDATA)>
+<!ELEMENT Language (#PCDATA)>
+<!ELEMENT MedlineTA (#PCDATA)>
+<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
+<!ELEMENT MeshHeadingList (MeshHeading+)>
+<!ELEMENT MinorTitleChangeYN (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Month (#PCDATA)>
+<!ELEMENT NlmUniqueID (#PCDATA)>
+<!ELEMENT PMCEmbargo (#PCDATA)>
+<!ELEMENT PMCHoldings (#PCDATA)>
+<!ELEMENT Place (#PCDATA)>
+<!ELEMENT PublicationEndYear (#PCDATA)>
+<!ELEMENT PublicationFirstYear (#PCDATA)>
+<!ELEMENT PublicationInfo (Country?, Place*, Publisher*, 
+                           PublicationFirstYear?, PublicationEndYear?,
+                           Frequency*)>
+<!ELEMENT Publisher (#PCDATA)>
+<!ELEMENT QualifierName (#PCDATA)>
+<!ATTLIST QualifierName
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT ReportedMedlineYN (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+<!ELEMENT SortSerialName (#PCDATA)>
+<!ELEMENT Title (#PCDATA)>
+<!ELEMENT XrTitle (#PCDATA)>
+<!ELEMENT Year (#PCDATA)>
diff --git a/dtd/nlmsharedcatcit_060101.dtd b/dtd/nlmsharedcatcit_060101.dtd
new file mode 100644
index 0000000..d909d83
--- /dev/null
+++ b/dtd/nlmsharedcatcit_060101.dtd
@@ -0,0 +1,81 @@
+<!-- NLMSharedCatCit DTD
+     
+     Comments and suggestions are welcome.
+     January 1, 2006
+
+     **See http://www.nlm.nih.gov/databases/dtd/nlmsharedcatcit_070101.dtd for the forthcoming 
+     NLMSharedCatCit DTD dated January 1, 2007 for future use.**
+
+     This is the DTD for data elements that are shared between 
+     NLMCatalogRecord and NLMMedlineCitation DTDs at the 
+     U.S. National Library of Medicine. 
+     
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+  
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmsharedcatcit_060101.dtd:
+     
+     a.  Changed entity reference from "nlmcommon_041101.dtd"
+                      to "nlmcommon_060101.dtd"
+
+     b.  Prefix attribute in OtherID moved before Source attribute
+
+    Historic Revision notes for previous versions of NLMSharedcatcit DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmsharedcatcit.html
+
+-->
+<!-- ====================================================================== -->
+<!-- Reference to Where the NLMCommon DTD is located  -->
+<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 1st January 2006//EN" 
+ "nlmcommon_060101.dtd"> 
+%NlmCommon;
+<!-- =================================================================  -->
+<!-- ================================================================= -->
+<!--  Further Definitions of NLM Tags                                  -->
+<!ELEMENT Chemical (RegistryNumber, NameOfSubstance)>
+<!ELEMENT ChemicalList (Chemical+)>
+<!ELEMENT DateCompleted (%normal.date;)>
+<!ELEMENT DateCreated (%normal.date;)>
+<!ELEMENT DateRevised (%normal.date;)>
+<!ELEMENT GeneralNote (#PCDATA)>
+<!ELEMENT Investigator (%personal.name;, Affiliation?)>
+<!ELEMENT InvestigatorList (Investigator+)>
+<!ELEMENT Keyword (#PCDATA)>
+<!ATTLIST Keyword
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT KeywordList (Keyword+)>
+<!ATTLIST KeywordList
+	Owner %Owner; "NLM"
+>
+<!ELEMENT NameOfSubstance (#PCDATA)>
+<!ELEMENT OtherAbstract (%Abstract;)>
+<!ATTLIST OtherAbstract
+	Type %Type;
+>
+<!ELEMENT OtherID (#PCDATA)>
+<!ATTLIST OtherID
+        Prefix CDATA #IMPLIED
+	Source %Source;       
+>
+<!ELEMENT PersonalNameSubject (%personal.name;, DatesAssociatedWithName?,
+                               NameQualifier?, OtherInformation?,
+                               TitleAssociatedWithName?)>
+<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT RegistryNumber (#PCDATA)>
+<!ELEMENT SpaceFlightMission (#PCDATA)>
diff --git a/dtd/nlmsharedcatcit_070101.dtd b/dtd/nlmsharedcatcit_070101.dtd
new file mode 100644
index 0000000..bf75c3c
--- /dev/null
+++ b/dtd/nlmsharedcatcit_070101.dtd
@@ -0,0 +1,81 @@
+<!-- NLMSharedCatCit DTD
+     
+     Comments and suggestions are welcome.
+     January 1, 2007 (v. 2)
+  
+     This is the DTD for data elements that are shared between 
+     NLMCatalogRecord and NLMMedlineCitation DTDs at the 
+     U.S. National Library of Medicine. 
+     
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+  
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmsharedcatcit_070101.dtd:
+     
+     a.  Changed entity reference from "nlmcommon_060101.dtd"
+                      to "nlmcommon_070101.dtd"
+
+     b.  Added entity NlmUniqueID.Ref 
+    
+    Historic Revision notes for previous versions of NLMSharedcatcit DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmsharedcatcit.html
+
+-->
+<!-- ====================================================================== -->
+<!-- internal DTD entities -->
+<!ENTITY % NlmUniqueID.Ref "NlmUniqueID?">
+<!-- ====================================================================== -->
+<!-- ====================================================================== -->
+<!-- Reference to Where the NLMCommon DTD is located  -->
+<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 1st January 2007//EN" 
+ "nlmcommon_070101.dtd"> 
+%NlmCommon;
+<!-- ======================================================================= -->
+<!--  Further Definitions of NLM Tags                                        -->
+<!ELEMENT Chemical (RegistryNumber, NameOfSubstance)>
+<!ELEMENT ChemicalList (Chemical+)>
+<!ELEMENT DateCompleted (%normal.date;)>
+<!ELEMENT DateCreated (%normal.date;)>
+<!ELEMENT DateRevised (%normal.date;)>
+<!ELEMENT GeneralNote (#PCDATA)>
+<!ELEMENT Investigator (%personal.name;, Affiliation?)>
+<!ELEMENT InvestigatorList (Investigator+)>
+<!ELEMENT Keyword (#PCDATA)>
+<!ATTLIST Keyword
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT KeywordList (Keyword+)>
+<!ATTLIST KeywordList
+	Owner %Owner; "NLM"
+>
+<!ELEMENT NameOfSubstance (#PCDATA)>
+<!ELEMENT OtherAbstract (%Abstract;)>
+<!ATTLIST OtherAbstract
+	Type %Type;
+>
+<!ELEMENT OtherID (#PCDATA)>
+<!ATTLIST OtherID
+        Prefix CDATA #IMPLIED
+	Source %Source;       
+>
+<!ELEMENT PersonalNameSubject (%personal.name;, DatesAssociatedWithName?,
+                               NameQualifier?, OtherInformation?,
+                               TitleAssociatedWithName?)>
+<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT RegistryNumber (#PCDATA)>
+<!ELEMENT SpaceFlightMission (#PCDATA)>
diff --git a/dtd/nlmsharedcatcit_080101.dtd b/dtd/nlmsharedcatcit_080101.dtd
new file mode 100644
index 0000000..f7397ea
--- /dev/null
+++ b/dtd/nlmsharedcatcit_080101.dtd
@@ -0,0 +1,80 @@
+<!-- NLMSharedCatCit DTD
+
+     Comments and suggestions are welcome.
+     January 1, 2008
+  
+     This is the DTD for data elements that are shared between 
+     NLMCatalogRecord and NLMMedlineCitation DTDs at the 
+     U.S. National Library of Medicine. 
+     
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+  
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmsharedcatcit_080101.dtd:
+     
+     a.  Changed entity reference from "nlmcommon_070101.dtd"
+                      to "nlmcommon_080101.dtd"
+
+     b.  Moved Investigator & InvestigatorList from nlmsharedcatcit dtd to
+         nlmcommon dtd
+    
+    Historic Revision notes for previous versions of NLMSharedcatcit DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmsharedcatcit.html
+
+-->
+<!-- ====================================================================== -->
+<!-- internal DTD entities -->
+<!ENTITY % NlmUniqueID.Ref "NlmUniqueID?">
+<!-- ====================================================================== -->
+<!-- ====================================================================== -->
+<!-- Reference to Where the NLMCommon DTD is located  -->
+<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 1st January 2008//EN" 
+ "nlmcommon_080101.dtd"> 
+%NlmCommon;
+<!-- ======================================================================= -->
+<!--  Further Definitions of NLM Tags                                        -->
+<!ELEMENT Chemical (RegistryNumber, NameOfSubstance)>
+<!ELEMENT ChemicalList (Chemical+)>
+<!ELEMENT DateCompleted (%normal.date;)>
+<!ELEMENT DateCreated (%normal.date;)>
+<!ELEMENT DateRevised (%normal.date;)>
+<!ELEMENT GeneralNote (#PCDATA)>
+<!ELEMENT Keyword (#PCDATA)>
+<!ATTLIST Keyword
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT KeywordList (Keyword+)>
+<!ATTLIST KeywordList
+	Owner %Owner; "NLM"
+>
+<!ELEMENT NameOfSubstance (#PCDATA)>
+<!ELEMENT OtherAbstract (%Abstract;)>
+<!ATTLIST OtherAbstract
+	Type %Type;
+>
+<!ELEMENT OtherID (#PCDATA)>
+<!ATTLIST OtherID
+        Prefix CDATA #IMPLIED
+	Source %Source;       
+>
+<!ELEMENT PersonalNameSubject (%personal.name;, DatesAssociatedWithName?,
+                               NameQualifier?, OtherInformation?,
+                               TitleAssociatedWithName?)>
+<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT RegistryNumber (#PCDATA)>
+<!ELEMENT SpaceFlightMission (#PCDATA)>
diff --git a/dtd/nlmsharedcatcit_090101.dtd b/dtd/nlmsharedcatcit_090101.dtd
new file mode 100644
index 0000000..2a41d3e
--- /dev/null
+++ b/dtd/nlmsharedcatcit_090101.dtd
@@ -0,0 +1,80 @@
+<!-- NLMSharedCatCit DTD
+
+     Comments and suggestions are welcome.
+     January 1, 2009
+
+     **THIS IS THE FORTHCOMING DTD FOR 2009 NOT CURRENTLY IN USE.  
+     SEE http://www.nlm.nih.gov/databases/dtd/nlmsharedcatcit_080101.dtd FOR THE 
+     NLMSHAREDCATCIT DTD DATED JANUARY 1, 2008 CURRENTLY IN USE.**  
+  
+     This is the DTD for data elements that are shared between 
+     NLMCatalogRecord and NLMMedlineCitation DTDs at the 
+     U.S. National Library of Medicine. 
+     
+    NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
+    represents a citation from a Medline-selected journal.  When the NLM DTDs and 
+    XML elements were first created, MEDLINE records were the only data exported. 
+    Now NLM exports citations other than MEDLINE records using these tools. To 
+    minimize unnecessary disruption to users of the data and tools, NLM has
+    retained the original DTD and element names (e.g., NLMMedline DTD, MedlineTA,
+    MedlineJournalInfo)).       
+  
+  * = 0 or more occurrences (optional element, repeatable)
+  ? = 0 or 1 occurrences (optional element, at most 1)
+  + = 1 or more occurrences (required element, repeatable)
+   | = choice, one or the other but not both 
+  no symbol = required element
+-->
+<!-- ================================================================= -->
+<!--   Revision Notes Section 
+
+The following changes were made in the nlmsharedcatcit_090101.dtd:
+     
+     a.  Changed entity reference from "nlmcommon_080101.dtd"
+                      to "nlmcommon_090101.dtd"
+
+     b.  Moved OtherAbstract element from nlmsharedcatcit dtd to
+         nlmcommon dtd
+    
+    Historic Revision notes for previous versions of NLMSharedcatcit DTD
+     See:
+     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmsharedcatcit.html
+
+-->
+<!-- ====================================================================== -->
+<!-- internal DTD entities -->
+<!ENTITY % NlmUniqueID.Ref "NlmUniqueID?">
+<!-- ====================================================================== -->
+<!-- ====================================================================== -->
+<!-- Reference to Where the NLMCommon DTD is located  -->
+<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 1st January 2009//EN" 
+"nlmcommon_090101.dtd"> 
+%NlmCommon;
+<!-- ======================================================================= -->
+<!--  Further Definitions of NLM Tags                                        -->
+<!ELEMENT Chemical (RegistryNumber, NameOfSubstance)>
+<!ELEMENT ChemicalList (Chemical+)>
+<!ELEMENT DateCompleted (%normal.date;)>
+<!ELEMENT DateCreated (%normal.date;)>
+<!ELEMENT DateRevised (%normal.date;)>
+<!ELEMENT GeneralNote (#PCDATA)>
+<!ELEMENT Keyword (#PCDATA)>
+<!ATTLIST Keyword
+	MajorTopicYN (Y | N) "N"
+>
+<!ELEMENT KeywordList (Keyword+)>
+<!ATTLIST KeywordList
+	Owner %Owner; "NLM"
+>
+<!ELEMENT NameOfSubstance (#PCDATA)>
+<!ELEMENT OtherID (#PCDATA)>
+<!ATTLIST OtherID
+        Prefix CDATA #IMPLIED
+	Source %Source;       
+>
+<!ELEMENT PersonalNameSubject (%personal.name;, DatesAssociatedWithName?,
+                               NameQualifier?, OtherInformation?,
+                               TitleAssociatedWithName?)>
+<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
+<!ELEMENT RegistryNumber (#PCDATA)>
+<!ELEMENT SpaceFlightMission (#PCDATA)>
diff --git a/dtd/notat.ent b/dtd/notat.ent
new file mode 100644
index 0000000..b46a91d
--- /dev/null
+++ b/dtd/notat.ent
@@ -0,0 +1,172 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Notation Declarations                             -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      July 2003                                         -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Notation Declarations v2.0 20040830//EN
+     Delivered as file "notat.ent"                                 -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    To name all the allowable notations               -->
+<!--                                                               -->
+<!-- CONTAINS:   Notation Declarations                             -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+          modularization requirements.
+
+  2. LATEX - Added as a notation for display and inline formulas  
+  
+  1. Updated public identifier to "v2.0 20040830"                  -->
+
+
+<!-- ============================================================= -->
+<!--               NOTATION DECLARATIONS                           -->
+<!-- ============================================================= -->
+
+ 
+<!--               LATEX (for Mathematics)                         -->
+<!NOTATION  LaTeX  PUBLIC
+           "+//ISBN 3-893-196463::Goosens//NOTATION Der LaTeX Begleiter//DE"  >
+
+ 
+<!--               TEX (for Mathematics)                           -->
+<!NOTATION  TEX  PUBLIC
+           "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN"  >
+<!NOTATION  tex  PUBLIC
+           "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN"  >
+<!NOTATION  TeX  PUBLIC
+           "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN"  >
+
+
+<!-- ============================================================= -->
+<!--               POTENTIAL NOTATION DECLARATIONS                 -->
+<!-- ============================================================= -->
+
+
+<!--               CGM (Computer Graphics Metafile)                -->
+<!NOTATION cgmchar PUBLIC 
+"ISO 8632/2//NOTATION Character encoding//EN"
+                                                                     >
+<!NOTATION cgmclear PUBLIC 
+"ISO 8632/4//NOTATION Clear text encoding//EN"
+                                                                     >
+
+
+<!--               GIF (Graphic Interchange Format)                -->
+<!NOTATION gif     PUBLIC
+"-//ISBN 0-7923-9432-1::Graphic Notation//NOTATION CompuServe 
+Graphic Interchange Format//EN"                                      
+                                                                     >
+
+<!--               EPS (Adobe's Encapsulate Postscript)            -->
+<!NOTATION eps     PUBLIC
+"+//ISBN 0-201-18127-4::Adobe//NOTATION PostScript Language Reference Manual//EN" 
+                                                                     >
+
+
+<!--               JPEG (Joint Photographic Experts Group raster)  -->
+<!NOTATION jpeg    PUBLIC
+"+//ISBN 0-7923-9432-1::Graphic Notation//NOTATION Joint Photographic Experts Group raster//EN"                               
+                                                                     >
+
+<!--               TIFF (Uncompressed)                             -->
+<!NOTATION tiff    PUBLIC
+"+//ISBN 0-7923-9432-1::Graphic Notation//NOTATION Aldus/Microsoft 
+Tagged Interchange File Format//EN"                                  >
+
+
+<!-- ================== End Notation Module ====================== -->
diff --git a/dtd/para.ent b/dtd/para.ent
new file mode 100644
index 0000000..3c2f114
--- /dev/null
+++ b/dtd/para.ent
@@ -0,0 +1,420 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Paragraph-Like Elements                           -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Paragraph-Like Elements v2.0 20040830//EN"
+     Delivered as file "para.ent"                                  -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Names structural elements that will appear in     -->
+<!--             the same places as a paragraph                    -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definition of the paragraph class      -->
+<!--             2) Paragraph <p>                                  -->
+<!--             3) Displayed Quote <disp-quote>                   -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  9. PARAGRAPH ELEMENT MODELING
+     ### Customization Alert ###
+     a. Changed the model of paragraph to use #PCDATA and
+        %p-elements; like all other #PCDATA models
+     b. Changed the inline-mix to use the OR-bar-first
+        mechanism.
+         - %inside-para;  [Now renamed -%p-elements;]
+           (used only inside Paragraph <p>)
+
+  8. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Added internal parentheses to Parameter Entity and removed 
+     them from Element Declaration for:
+     - %disp-quote-model;
+     - %statement-model;
+ 
+  7. RENAMED CLASSES
+     ### Customization Alert ###
+     Not all classes ended in the ".class" suffix. Changed the 
+     following to add the suffix:
+     - %display-back-matter.class; used in: 
+        - <disp-quote>
+        - <verse-group>
+
+  6. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+
+  5. NEW CLASSES - To correct potential classing problems, created
+     the following new Parameter Entities:
+        - %just-para.class; used in <speech>, <statement-model>
+        - %verse-group-model; for <verse-group>
+        - %verse-line-elements; for <verse-line>
+
+  4. Updated public identifier to "v2.0 20040830"         
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+      
+  3. Added attribute "content-type" to elements <p>, <speech> and 
+     <statement>.  
+     Rationale: To identify and preserve the semantic intent of 
+     semantically rich source documents.
+     
+  2. Added ID attribute to elements <p>, <speech>, <disp-quote>,
+     and <verse-group>. 
+     Rationale: Provide unique identifier so these elements can be 
+     linked to. 
+                                                                   
+     =============================================================
+     Version 1.0 Changes Before Public Release
+                                       (Lapeyre) V1.0 (2002-12-25)
+
+  1. DIALOG/SPEECH - Element <dialog> renamed <speech>  
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                          - %emphasized.text;
+                          - %p-elements;
+                          - %para-level;
+                          - %person-name.class;
+                          - %simple-link.class;
+                          - %simple-text;                          -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAGRAPH-LEVEL ELEMENTS                   -->
+<!-- ============================================================= -->
+
+
+<!--                    PARAGRAPH ELEMENTS                         -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a paragraph <p>. 
+                        DESIGN NOTE: There is a major overlap between 
+                        this parameter entity and the mix for elements
+                        that are at the same level as a paragraph.
+                        Inline elements appear only inside a 
+                        paragraph, but block elements such as quotes 
+                        and lists may appear either within a 
+                        paragraph or at the same level as a 
+                        paragraph. This serves a requirement in a 
+                        repository DTD, since some incoming material 
+                        will have restricted such elements to only 
+                        inside a paragraph, some incoming material 
+                        will have restricted them to only outside a 
+                        paragraph and some may allow them in both
+                        places. Thus the DTD must allow for them to
+                        be in either or both.                      
+                        DESIGN NOTE: Inline mixes begin with an
+                        OR bar                                     -->
+<!ENTITY % p-elements   "| %address-link.class; | 
+                         %article-link.class; |
+                         %block-display.class; |%block-math.class; | 
+                         %citation.class; | %emphasis.class; |
+                         %inline-display.class; | 
+                         %inline-math.class; | %list.class; | 
+                         %math.class; | %phrase.class; |
+                         %rest-of-para.class; | %simple-link.class; | 
+                         %subsup.class;"                             >
+
+<!--                    PARAGRAPH                                  -->
+<!--                    The basic block-unit of textual information
+                                                                   -->
+<!ELEMENT  p            (#PCDATA %p-elements;)*                      >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  p
+             id         ID                                 #IMPLIED  
+             content-type
+                        CDATA                              #IMPLIED  
+             xml:lang   NMTOKEN                            #IMPLIED  >
+                        
+
+<!--                    SPEECH                                     -->
+<!--                    One exchange in a real or imaginary 
+                        conversation between two or more entities, 
+                        for example, between a an interviewer and the 
+                        person being interviewed, between a nurse or 
+                        doctor and a patient, between a person and a 
+                        computer, etc.
+                        Authoring and Conversion Note: Speeches are
+                        modeled as a full paragraph, even if what is
+                        spoken is only a few words.                
+                        DESIGN NOTE: Speeches are not gathered into
+                        a larger structure, because there is no
+                        consistency in how this is done in existing
+                        journal DTDs, nor any real need for a
+                        full wrapper.                              -->
+<!ELEMENT  speech       (speaker, (%just-para.class;)+ )             >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  speech
+             id         ID                                 #IMPLIED  
+             content-type
+                        CDATA                              #IMPLIED
+             xml:lang   NMTOKEN                            #IMPLIED  >
+
+
+<!--                    SPEAKER ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a speaker.                                 -->
+<!ENTITY % speaker-elements
+                        "| %person-name.class; | %simple-link.class;">
+                        
+
+<!--                    SPEAKER                                    -->
+<!--                    One who utters a speech as part of a 
+                        speech, for example the computer "HAL" in
+                        the exchange 'Hal: "Hi Dave"'.             -->
+<!ELEMENT  speaker      (#PCDATA %speaker-elements;)*                >
+
+
+<!--                    QUOTE, DISPLAYED MODEL                     -->
+<!--                    Content model for the Display Quote element-->
+<!ENTITY % disp-quote-model     
+                        "(title?, (%para-level;)*, 
+                          (%display-back-matter.class;)* )"          > 
+            
+
+<!--                    QUOTE, DISPLAYED                           -->
+<!--                    Extract or extended quoted passage from 
+                        another work, usually made typographically 
+                        distinct from the surrounding text.
+                        Authoring and Conversion Note: Use this 
+                        element for epigraphs as well as block
+                        quotes and extracts within the text.       --> 
+<!ELEMENT  disp-quote   %disp-quote-model;                           >
+<!--         id         Unique identifier so the element may be
+                        referenced                                
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  disp-quote
+             id         ID                                 #IMPLIED  
+             xml:lang   NMTOKEN                            #IMPLIED  >
+ 
+
+<!--                    STATEMENT, FORMAL MODEL                    -->
+<!--                    Content model for the <statement> element  -->
+<!ENTITY % statement-model   
+                        "(label?, title?, (%just-para.class;)+ )"    > 
+            
+
+<!--                    STATEMENT, FORMAL                          -->
+<!--                    A Theorem, Lemma, Proof, Postulate,
+                        Hypothesis, Proposition, Corollary, or
+                        other formal statement, identified as such
+                        with a label, usually made typographically 
+                        distinct from the surrounding text         --> 
+<!ELEMENT  statement    %statement-model;                            >
+<!--         id         Unique identifier so that the statement can 
+                        be referenced by a <xref> element          
+             content-type   
+                        Identification of the subject, type of
+                        content, or reason that this word or phrase
+                        is considered semantically special, as a 
+                        means of preserving the semantic intent of 
+                        the original tagging.                      -->
+<!ATTLIST  statement
+             id         ID                                 #IMPLIED 
+             content-type
+                        CDATA                              #IMPLIED  >
+
+
+<!--                    VERSE GROUP MODEL                          -->
+<!--                    Content model for the <verse-group> element-->
+<!ENTITY % verse-group-model   
+                        "((verse-line | verse-group)+, 
+                         (%display-back-matter.class;)*) "           > 
+                        
+
+<!--                    VERSE FORM FOR POETRY                      -->
+<!--                    A song, poem, or verse.
+                        Implementer's Note: No attempt has been made
+                        to retain the look or visual form of the
+                        original.
+                        Remarks: Many physics journals include both
+                        initial epigraphs to articles and short
+                        articles that contain nothing but a topical,
+                        humorous, or elegiac poem.
+                        Related Elements: Poetry may also be tagged 
+                        with the <preformat> if spacing is critical, 
+                        but usually poetry should be tagged with the
+                        <verse-group> element, which may not preserve
+                        the exact indentation but is likely to be
+                        displayed in a proportional font.          -->
+<!ELEMENT  verse-group  %verse-group-model;                          > 
+<!--          id         Unique identifier so the element may be
+                        referenced
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->                
+<!ATTLIST  verse-group
+             id         ID                                 #IMPLIED  
+             xml:lang   NMTOKEN                            #IMPLIED  >
+
+
+<!--                    VERSE-LINE ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a speaker.                              
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-text; is an inline
+                        mix, the OR bar is already there.          -->
+<!ENTITY % verse-line-elements
+                        "%simple-text;"                              >
+
+
+<!--                    LINE OF A VERSE                            -->
+<!--                    One line of a poem or verse                -->
+<!ELEMENT  verse-line   (#PCDATA %verse-line-elements;)*             >
+
+
+<!-- ================== End Paragraph Class Module =============== -->
diff --git a/dtd/phrase.ent b/dtd/phrase.ent
new file mode 100644
index 0000000..983c81e
--- /dev/null
+++ b/dtd/phrase.ent
@@ -0,0 +1,278 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Subject Phrase Class Elements                     -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Subject Phrase Class Elements v2.0 20040830//EN"
+     Delivered as file "phrase.ent"                                -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the phrase.class, that is, names the      -->
+<!--             inline, subject-specific elements                 -->
+<!--                                                               -->
+<!--             If more specific subject words (such as "gene")   -->
+<!--             are added to later version of this DTD, they      -->
+<!--             should be added to the %phrase.class; entity and  -->
+<!--             defined in this module or in %common.ent;         -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Definition of the phrase class                 -->
+<!--             2) Subject Emphasis                               -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  6. REGULARIZE USE OF CLASSES
+     a. LINK CLASSES - Replaced %link.class; in the PE
+        %named-content-elements; with the following classes 
+        via inclusion of %all-phrase;
+        (no DTD change, just reparameterization):
+         - %address-link.class;   (links for journal article)
+         - %article-link.class;   (links for journal article)
+         - %simple-link.class;    (the internal links, same)
+        
+     b. NAMED CONTENT ELEMENTS - To make potential changes easier,
+        replaced the Parameter Entity %emphasized-text; with its
+        constituent classes
+      
+     c. RENAME EXISTING CLASSES
+        ### Customization Alert ###
+        Some classes did not have the ".class" suffix. Changed the 
+        names to add the class suffix:
+        - %block-math.class; (used in -%named-content-elements;)
+
+     d. ABBREV - Changed content model to use new %def.class;
+
+  5. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+      
+  4. Updated public identifier to "v2.0 20040830" 
+
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+  
+  3. Added following parameter entities to the content model for
+     <named-content>:
+        - %block-display.class;
+        - %block-math.class;
+        - %emphasized-text;
+        - %inline-display.class;
+        - %list.class;
+        - %rest-of-para.class;
+     Rationale: To expand content model of <named-content> to 
+     encompass most of the other phrase-level structures, which
+     will allow preservation of phrase-level semantic information
+     in content converted to this format.
+     
+  2. Added ID attribute to parameter entity %named-content-atts;  
+     Rationale: Provide unique identifier so <named-content>
+     element can be linked to. 
+         
+  1. Added ID attribute to element <abbrev>. 
+     Rationale: Provide unique identifier so <abbrev> element 
+     can be linked to. 
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires that the following parameter 
+                        entities be defined before calling this
+                        module, usually accomplished in the 
+                        Customization Module for the specific DTD:
+                          - %might-link-atts;  
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+                                                                
+                                                                 
+<!--                    NAMED CONTENT ATTRIBUTES                   -->
+<!--                    Attributes for the <named-content> element -->
+<!ENTITY % named-content-atts
+            "content-type   
+                        CDATA                            #REQUIRED 
+             id         ID                                #IMPLIED
+             %might-link-atts;"                                      >
+
+
+<!-- ============================================================= -->
+<!--                    PHRASE-LEVEL ELEMENTS                      -->
+<!-- ============================================================= -->
+
+
+<!--                    ABBREVIATION ELEMENTS                      -->
+<!--                    Elements for use in the <abbrev> element   -->
+<!ENTITY % abbrev-elements
+                        "| %def.class;"                              >
+
+
+<!--                    ABBREVIATION OR ACRONYM                    -->
+<!--                    Used to identify an abbreviation or acronym
+                        DTD DESIGN NOTE: We have not seen this much 
+                        in the world of STM journal publishing.
+                        This element was added explicitly to
+                        meet "Checkpoint 4.3[3.5] Annotate complex, 
+                        abbreviated, or unfamiliar information with 
+                        summaries and definitions" from the W3C Web
+                        Content Accessibility Guidelines 2.0.
+                        Remarks: The linking attributes can be used
+                        to provide a live link to an expansion,
+                        definition, or additional explanation.     -->
+<!ELEMENT  abbrev       (#PCDATA %abbrev-elements;)*                 >
+<!--         id         Unique identifier so the element may be
+                        referenced                                 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                -->            
+<!ATTLIST  abbrev
+             id         ID                                 #IMPLIED  
+             %might-link-atts;                                       >
+
+
+<!--                    NAMED CONTENT ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the <named-content> element                -->
+<!ENTITY % named-content-elements
+                        "| %address-link.class; |
+                         %article-link.class; |
+                         %block-display.class; | %block-math.class;|
+                         %emphasis.class;  | %inline-math.class; | 
+                         %inline-display.class; | 
+                         %list.class; | %math.class; | 
+                         %phrase.class; | %simple-link.class; | 
+                         %subsup.class; |  %rest-of-para.class;"     >
+
+
+<!--                    NAMED SPECIAL (SUBJECT) CONTENT            -->
+<!--                    A word or phrase within the text that should
+                        be treated differently, often given a
+                        special typographic style or look, because
+                        the content/subject matter is distinct. For
+                        example, the word is a drug name or a 
+                        gene or the phrase identifies an organism 
+                        genus/species.                             -->
+<!ELEMENT  named-content
+                        (#PCDATA %named-content-elements;)*          >
+<!--         content-type   
+                        Identification of the subject or type of
+                        content that makes this word or phrase
+                        semantically special, usually to be treated 
+                        differently, for example, given a different 
+                        look in print or display.
+                           As an example, this attribute could be 
+                        used to identify a drug name, company name, 
+                        or product name.  It could be used to define 
+                        systematics terms such as genus, family, 
+                        order,  or suborder. It could be used to 
+                        identify biological components such as 
+                        gene, protein, or peptide. Therefore 
+                        values may include information classes, 
+                        semantic categories, or types of nouns, 
+                        such as "generic-drug-name", "genus-species",
+                        "gene", "peptide", "product", etc.  
+             id         Unique identifier so the element may be
+                        referenced                                 
+             xlink:href Provides an address or identifier of the
+                        object to which the link points, for
+                        example a URI or a filename                --> 
+ <!ATTLIST  named-content
+             %named-content-atts;                                    >
+
+
+<!-- ================== End Phrase Class Module ================== -->
diff --git a/dtd/pmc-1.dtd b/dtd/pmc-1.dtd
new file mode 100644
index 0000000..db84036
--- /dev/null
+++ b/dtd/pmc-1.dtd
@@ -0,0 +1,900 @@
+<!--
+# $Id: pmc-1.dtd,v 1.136 2004/12/08 23:38:35 merker Exp $
+-->
+<!-- PMC DTD Version History:
+
+   2000-08-09
+           Initial Draft. This is derived from the Keton Full Text DTD, which itself is based on the CJS 2.1 DTD.
+
+All changes since August 2000 are documented in pmc-1-dtdnotes.txt in this directory.
+
+-->
+<!--    Public document type definition. Typical invocation:
+<!DOCTYPE art PUBLIC "-//PMC//DTD FULL LENGTH ARTICLE//EN" []>
+-->
+
+<!-- Character Entities  -->
+<!ENTITY % PMCEntities SYSTEM	"pmc.ent">
+<!ENTITY % ISO8879ent SYSTEM	"iso-8879-1986.ent">
+<!ENTITY % ISO9573ent SYSTEM	"iso-9573-13-1991.ent">
+
+%PMCEntities; %ISO8879ent; %ISO9573ent;
+
+<!-- Internal Entities  -->
+<!ENTITY % data "#PCDATA|entitygrp|b|it|sc|ul|sup|sub|email|fnr|exlnk|break|mml:math">
+
+<!ENTITY % id-att
+	"id	     ID         #IMPLIED">
+
+<!ENTITY % id-att-required
+	"id	     ID         #IMPLIED">
+
+<!ENTITY % figr-atts
+	"fid 		IDREF 		#REQUIRED
+	 to  		IDREF 		#IMPLIED">
+
+<!ENTITY % tblr-atts
+	"tid 		IDREF 		#REQUIRED
+	 to  		IDREF 		#IMPLIED">
+
+<!ENTITY % abbr-atts
+	"bid 		IDREF 		#REQUIRED
+	 to  		IDREF 		#IMPLIED">
+
+<!ENTITY % rid-atts
+	"rid     IDREF       #REQUIRED">
+
+<!ENTITY % fnr-atts
+	"rid     IDREF       #REQUIRED
+	 to      IDREF       #IMPLIED">
+	 
+<!ENTITY % insr-atts
+	"iid     IDREF       #IMPLIED">
+
+<!ENTITY %	supplr-atts
+	"sid     CDATA       #REQUIRED
+	 to      CDATA       #IMPLIED">
+
+<!ENTITY %	secr-atts
+	"sid     IDREF       #REQUIRED">
+
+
+<!-- Associated DTD for Supplemental Data files: Supplemental data information can
+be included in the xml file (see the element "suppl"). Files created to this DTD are 
+used for the display of supplemental data on the PMC site -->
+<!ENTITY % supp_data_dtd SYSTEM "sdata.dtd">
+%supp_data_dtd;
+
+
+
+
+<!-- **************** Article level elements **************** -->
+<!ELEMENT art (ui*, ji, fm, bdy?, bm?, response*, sdata?)>
+<!ATTLIST art
+	type (commentary | correction | editorial | letter | obituary | 
+	      product_review | retraction | reply | review_art | 
+			series | admin | advert | cover | toc | index | filler |
+			poster) #IMPLIED
+	language (eng|spa|fre|ger|rus|jpn|ita) #IMPLIED>
+	
+<!-- type attribute not needed for regular articles -->
+
+<!-- language attribute	
+	language attribute not needed for articles in English
+	eng	English
+	spa	Spanish
+	fre	French
+	ger	German
+	rus	Russian
+	jpn	Japanese
+	ita	Italian -->
+	
+	
+	
+
+<!-- Unique Identifier: Optional element, used by rendering code for generating links -->
+<!ELEMENT ui (#PCDATA)>
+<!ATTLIST ui
+	type (aid | artnum | doi | pmid | pmc | pii | other) #IMPLIED >
+<!-- ui types
+	aid	    - article id (publisher's id)
+	artnum   - article number (publisher's number)
+	doi	   - digital object identifier (see www.doi.org)
+	pmid   - pubmed id (see www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed)
+	pmc - pubmed central id
+	-->
+
+<!-- Journal Identifier: Required element, used for identification of journal domain. 
+This is generally a short abbreviation of the journal title -->
+<!ELEMENT ji (#PCDATA)>
+
+<!-- Front matter -->
+<!ELEMENT fm (doctopic*, dochead?, docsubj*, supptitle?, sertitle*, sertext?, addart?, bibl, 
+product*, suppmat?, history?, com?, con?, cor*, cpyrt?, relart*, shortabs?, abs?, kwdg?)>
+
+<!-- Body -->
+<!ELEMENT bdy (p*, (sec|fig|tbl)*)>
+
+<!-- Back matter -->
+<!ELEMENT bm ( (ack?, glossary?, notes*, (appm |refgrp)*, fn*) | sec) > 
+
+<!-- Response to the Article -->
+<!ELEMENT response (fm?, bdy?, bm?)>
+<!ATTLIST response
+	%id-att; >
+
+
+
+
+<!-- **************** Front Matter elements **************** -->
+<!-- Document topic -->
+<!ELEMENT doctopic (%data;)*>
+
+<!-- Document heading or type -->
+<!ELEMENT dochead (%data;)*>
+
+<!-- Document subject -->
+<!ELEMENT docsubj (%data;)*>
+
+<!-- Supplement title -->
+<!ELEMENT supptitle (%data;)*>
+
+<!-- Series title -->
+<!ELEMENT sertitle (%data;)*>
+
+<!-- Series text - descriptitve text for a series of articles -->
+<!ELEMENT sertext (p*) >
+
+<!-- Addendum and/or correction information: This element is used in Erratum articles
+to identify the article that is being corrected -->
+<!ELEMENT addart EMPTY>
+<!ATTLIST addart
+	vol CDATA #IMPLIED
+	pg CDATA #REQUIRED
+	date CDATA #IMPLIED
+	ui CDATA #IMPLIED
+	pmid CDATA #IMPLIED>
+	
+	
+<!-- *************Bibliographic Information *******************-->
+<!--(the "bibl" element is shared between front matter and 
+references). Attributes to "bibl" are only used in the bibliography
+(B1, B2, etc.). They are not needed in the article (frontmatter) 
+information -->
+<!ELEMENT bibl (title?, edg?, (aug | insg)*, firstauaff?, ang?, source?, issn?, publisher?, 
+pubdate?, volume?, edition?, issue?, fpage?, lpage?, range?, stringrange?, exlnk?, inpress?, p*, xrefbib?)>
+<!ATTLIST bibl
+	%id-att;
+	no CDATA #IMPLIED >
+
+<!-- Title -->
+<!ELEMENT title (p, subtitle?)>
+<!ELEMENT subtitle (p)>
+
+<!-- ****** Author and Editor Group ******* -->
+<!-- Editor Group -->
+<!ELEMENT edg ((collab | au | etal)*, ins?)>
+<!ATTLIST edg
+	type CDATA #IMPLIED>
+	
+<!-- ******Author Group****** -->
+<!ELEMENT aug (collab | au | etal)*>
+
+<!-- Author Elements -->
+<!ELEMENT au (snm, (mi |mnm)?, fnm?, suf?, degree*, roles*, (insr | anr)*, email*, aucomment?)>
+<!ATTLIST au
+	%id-att;
+	ca (no | yes) #IMPLIED
+	ce (no | yes) #IMPLIED
+	da (no | yes) #IMPLIED
+>
+<!-- ca=Corresponding Author (set to 'yes' if they are)
+	  ce=Contributed equally (set to 'yes' if they did)
+	  da=deceased author
+ -->
+
+
+<!-- Collaborative author: used for groups of authors credited under one name -->
+<!ELEMENT collab (#PCDATA | insr | anr | email | entitygrp | it | sc | sup | sub | b | break | exlnk)*>
+<!ATTLIST collab
+	type	(on_behalf) #IMPLIED
+>
+<!-- use type=on_behalf when a group is not the author, but individual authors
+      are writing "on behalf" of an organization-->
+<!-- Surname -->	
+<!ELEMENT snm (%data;)*>
+
+<!-- Middle Initial(s) -->
+<!ELEMENT mi (%data;)*>
+
+<!-- Middle Name -->
+<!ELEMENT mnm (%data;)*>
+
+<!-- First Name -->
+<!ELEMENT fnm (%data;)*>
+
+<!-- Suffix (ie, Jr. III, 3rd) -->
+<!ELEMENT suf (#PCDATA | sup)*>
+
+<!-- Degree(s) -->
+<!ELEMENT degree (%data;)*>
+
+<!-- Roles (author's role/title) -->
+<!ELEMENT roles (%data;)*>
+
+<!-- Email address -->
+<!ELEMENT email (%data;)*>
+
+<!-- ET AL -->
+<!ELEMENT etal EMPTY>
+
+<!-- Author Comment: used for extra text associated with an author -->
+<!ELEMENT aucomment (#PCDATA | insr | anr | it | b | sc | sup | sub)* >
+
+
+<!-- ******* Institutions *************-->
+<!-- Institution Group -->
+<!ELEMENT insg (ins+)>
+
+<!-- Institution -->
+<!ELEMENT ins (p)>
+<!ATTLIST ins
+	%id-att;>
+
+<!-- First Author's Affiliation (used for PubMed affiliation) -->
+<!ELEMENT firstauaff (%data;)*>
+
+<!-- Author Notes: Footnotes to authors are collected in the Author note group -->
+<!ELEMENT ang (fn+)>
+
+<!-- Source: Journal or Book title -->
+<!ELEMENT source (#PCDATA | b | it | sc | sup | sub | ms | entitygrp | exlnk)*>
+
+<!-- ISSN -->
+<!ELEMENT issn (%data;)*>
+
+<!-- Publisher -->
+<!ELEMENT publisher (name?, location?)>
+<!ELEMENT name (%data;)*>
+<!ELEMENT location (%data;)*>
+
+<!-- Publication date (year): this is the publication date of the issue. Can be any string
+ (ie "January, 2001" "Fall 2001" "March 11, 2001"  -->
+<!ELEMENT pubdate (#PCDATA)>
+
+<!-- Volume -->
+<!ELEMENT volume (%data;)*>
+
+<!-- Edition -->
+<!ELEMENT edition (%data;)*>
+
+<!-- Issue -->
+<!ELEMENT issue (#PCDATA)>
+
+<!-- First page -->
+<!ELEMENT fpage (#PCDATA)>
+<!ATTLIST fpage
+		seq CDATA #IMPLIED >
+<!-- seq attribute used for sequence number or letter for continuous makeup journals with
+more than one article starting on the same page -->
+
+<!-- Last page -->
+<!ELEMENT lpage (#PCDATA)>
+
+<!-- Page range: Specifies non-continuous page ranges -->
+<!-- PAGE RANGE -->
+<!ELEMENT range        (subrange+) >
+<!ELEMENT subrange     EMPTY       >
+<!ATTLIST subrange
+	begin		CDATA		#IMPLIED
+	end		CDATA		#IMPLIED
+	single	CDATA		#IMPLIED
+	>
+
+<!-- String range: Page range as a string -->
+<!ELEMENT stringrange	(#PCDATA)>
+
+<!-- In press: used only in the refgrp, not in the fm -->
+<!ELEMENT inpress EMPTY>
+
+<!-- Bibliographic Links -->
+<!ELEMENT xrefbib ((pubidlist | pubid), pubid*)>
+<!-- PubId group. You can use an identifier, or a list of alternate ids 
+for the same article. This is taken from the NCBI publisher.dtd -->
+<!ELEMENT pubidlist (pubid+)>
+<!ELEMENT pubid (#PCDATA)>
+<!ATTLIST pubid
+	idtype (pubmed | medline | doi | pii | pmcid | pmcpid | pmpid) #REQUIRED>
+
+
+<!-- product is used to supply information about products (books, software, hardware, 
+    etc. being reviewed--> 
+<!ELEMENT product (%data;|bibl)*>
+<!ATTLIST product
+	product-type CDATA	#IMPLIED>
+<!-- product-types can be: book, software, hardware, website -->
+
+<!-- suppmat is the publisher-supplied toc link for supplemental material to an article--> 
+<!ELEMENT suppmat (%data;)*>
+
+
+<!-- Document History -->
+<!ELEMENT history (rec | revreq | revrec | acc | pub | epub)*>
+
+<!-- Date received -->
+<!ELEMENT rec (date)>
+
+<!-- Date revisions requested -->
+<!ELEMENT revreq (date)>
+
+<!-- Date revisions received -->
+<!ELEMENT revrec (date)>
+
+<!-- Date accepted -->
+<!ELEMENT acc (date)>
+
+<!-- Date published: This is the article/issue publication date -->
+<!ELEMENT pub (date)>
+
+<!-- Date electronic version of the article was published -->
+<!ELEMENT epub (date)>
+
+
+<!-- Date (day / month / year) -->
+<!-- These should ALWAYS be numeric values!!!! -->
+<!ELEMENT date (day?, month?, year)>
+<!ELEMENT day (#PCDATA)>
+<!ELEMENT month (#PCDATA)>
+<!ELEMENT year (#PCDATA)>
+
+
+<!-- Communicated by and Contributed by Information -->
+<!-- Communicated by -->
+<!ELEMENT com (%data;)*>
+
+<!-- Contributed by -->
+<!ELEMENT con (%data;)*>
+
+<!-- Correspondence information -->
+<!ELEMENT cor (%data;)*>
+
+
+<!-- Copyright Information -->
+<!ELEMENT cpyrt (#PCDATA | date | cpyrtnme | cpyrtclr | exlnk | it)*>
+
+<!-- Copyright holder's name -->
+<!ELEMENT cpyrtnme (collab | au)+>
+
+<!-- Copyright clearance organization -->
+<!ELEMENT cpyrtclr (collab | au)+>
+
+
+<!-- frontmatter text links to related articles -->
+<!ELEMENT relart (p | (linktype, ui?, title?, aug*, volume, issue?, fpage, lpage?, pub?))>
+<!ATTLIST relart
+	type CDATA #IMPLIED>
+
+<!ELEMENT linktype (#PCDATA)>
+	
+	
+<!-- Short abstract -->
+<!ELEMENT shortabs (sec+)>
+
+
+<!-- Keywords -->
+<!ELEMENT kwdg (kwd+)>
+<!ELEMENT kwd (#PCDATA | b | it | sc | sup | sub | entitygrp)*>
+
+
+<!-- Abstract -->
+<!ELEMENT abs (sec+)>
+
+
+<!-- ************** Section Elements ********************-->
+<!-- Section -->
+<!-- Note: Tables and figures do NOT occur inside paragraph tags!! -->
+<!ELEMENT sec (st?, (p | sec | tbl | fig | suppl | fn | graphic | refgrp)*)>
+<!ATTLIST sec
+		type      CDATA      #IMPLIED
+	   displevel CDATA      #IMPLIED
+	   %id-att;>
+<!-- Note: Level 1 heads may be assigned a type attribute if they are 
+of a certain content type (for indexing purposes). A section that contains 
+content of more than one type will have the type IDs combined. 
+(ie, "Materials and Methods" would be type="3|4") -->
+<!-- 
+             type ID	        content type
+     
+		1		Introduction/Synopsis
+		3		Materials
+		4		Methods/Procedures
+		5		Patients/Participants/Subjects
+		6		Cases/Case Reports
+		7		Results/Statement of Findings
+		8		Discussion/Interpretation
+		9		Conclusions/Comment
+		10		Appendix
+		11		Acknowledgments
+		12		Footnotes/Author Footnotes
+		13		References
+-->
+<!-- Content in Appendix [<bm><appm><app>], Abstract [<fm>(<abs>|<shortabs>)], 
+Acknowledgments [<bm><ack>], Footnotes [<bm><fn>] or Author Footnotes 
+[<fm><bibl><ang><an>], and References [<bm><refgrp>] can be recognized by its 
+identifying element if it is to be indexed. It does not need to be tagged with 
+a type attribute. -->
+
+<!-- Section Title -->
+<!ELEMENT st (p)>
+
+<!-- Paragraph -->
+<!ELEMENT p (#PCDATA | it | b | aff | abbr | fnr | ms | tblr | arrayr | hr | tblfnr | 
+figr | appr | supplr | fdr | sc | ul | sub | sup | boxtext | qd | l | f | fd | 
+deflist | math | exlnk | email | graphic | entitygrp | font | secr | bibl | 
+break | array | refgrp)*>
+
+<!-- Superscript -->
+<!ELEMENT sup (#PCDATA | b | it | sc | ul | sup | sub | tblfnr | figr | tblr | arrayr | 
+entitygrp | math | ms | exlnk | graphic | f | font)*>
+
+<!-- Subscript -->
+<!ELEMENT sub (#PCDATA | b | it | sc | ul | sup | sub | tblfnr | figr | tblr | arrayr | 
+entitygrp | math | ms | exlnk | graphic | f | font)*>
+
+<!-- Boldface -->
+<!ELEMENT b (#PCDATA | sup | sub | it | ul | sc | abbr | tblfnr | figr | tblr | arrayr | fnr |
+entitygrp | exlnk | fdr | ms| break | graphic | font | email | hr | math)*>
+
+<!-- Italic -->
+<!ELEMENT it (#PCDATA | sup | sub | b | ul | sc | abbr | tblfnr | figr | tblr | arrayr | fnr |
+entitygrp | appr | exlnk | fdr | ms | math| break | graphic | font | email)*>
+
+<!-- Small Cap -->
+<!ELEMENT sc (#PCDATA | sup | sub | b | it | ul | tblfnr | figr | tblr | arrayr | 
+entitygrp | exlnk | fdr | ms| break | graphic | font)*>
+
+<!-- Monospace text (typewriter text) -->
+<!ELEMENT ms (#PCDATA | sup | sub | b | it | ul | sc | tblfnr | figr | 
+tblr | arrayr | entitygrp | exlnk | fdr | font | break | math | graphic)*>
+
+<!-- Underline -->
+<!ELEMENT ul (#PCDATA | ul | sup | sub | b | it | sc | tblfnr | figr | 
+tblr | arrayr | entitygrp | exlnk | fdr | math | ms| break | graphic | font)*>
+<!ATTLIST ul 
+		style CDATA #IMPLIED>
+
+
+<!-- Affiliation -->
+<!ELEMENT aff (%data;)*>
+<!ATTLIST aff
+	%id-att;>
+
+
+<!-- Grouped (combined) entities: used for indicating that two entities should
+be combined for one character -->
+<!ELEMENT entitygrp (#PCDATA)>
+
+<!-- Boxtext -->
+<!ELEMENT boxtext (st?, p*, sec*)>
+<!ATTLIST boxtext
+	style CDATA #IMPLIED
+	color CDATA #IMPLIED>
+
+<!-- Font - font should be use only to modify text for purposes of distinguishing 
+data and not for stylistic or display purposes -->
+<!ELEMENT font (%data;)* >
+<!ATTLIST font
+		color CDATA #IMPLIED
+		style CDATA #IMPLIED
+		face  CDATA #IMPLIED>
+
+<!-- Displayed Quotes -->
+<!ELEMENT qd (p+)>
+
+<!-- List -->
+<!ELEMENT l (li+)>
+<!ATTLIST l
+	type CDATA #IMPLIED>
+<!-- LIST TYPES 
+	1 - ordered (numbered) list
+	2 - unordered (bulleted) list
+	3 - ordered (alpha - lowercase) list
+	4 - ordered (alpha - uppercase) list
+	5 - ordered (roman - lowercase) list
+	6 - ordered (roman - uppercase) list
+	7 - unlabeled (neither numbers nor bullets)
+-->
+
+<!-- list item -->
+<!ELEMENT li (p | tbl | fig)*>
+<!ATTLIST li
+	id CDATA #IMPLIED>
+	
+<!-- *********** Math Elements ************  -->
+	
+<!-- Inline Formula -->
+<!ELEMENT f (#PCDATA | graphic | math | entitygrp)*>
+
+<!-- Displayed Formula -->
+<!ELEMENT fd (#PCDATA | graphic | math | entitygrp)*>
+<!ATTLIST fd
+	id	 CDATA  #IMPLIED
+	sid CDATA #IMPLIED
+	align CDATA #IMPLIED>
+	
+<!-- Math Equation 
+Moved NOTATION for Tex to sdata.dtd
+
+<!NOTATION tex PUBLIC
+              "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN">
+<!NOTATION TEX PUBLIC
+              "+//ISBN 0-201-13448-9::Knuth//NOTATION The TeXbook//EN">-->
+<!ELEMENT math (%data;)*>
+<!ATTLIST math
+	mathtype NOTATION (tex|mathml) #IMPLIED
+	id CDATA #IMPLIED>
+
+<!NOTATION mathml PUBLIC
+              "-//W3C//DTD MathML 2.0//EN">
+
+
+
+<!-- ****************** Backmatter Elements ******************** -->
+<!-- Acknowledgements -->
+<!ELEMENT ack (sec+)>
+
+<!-- Glossary  Elements -->
+<!-- Glossary -->
+<!ELEMENT glossary (st?, deflist)>
+
+<!-- Definition list -->
+<!ELEMENT deflist ((term, dd)+)>
+
+<!-- Term -->
+<!ELEMENT term (p)>
+<!ATTLIST term
+	%id-att;>
+	
+<!-- Definition -->
+<!ELEMENT dd (p+)>
+<!ATTLIST dd
+	id CDATA #IMPLIED>
+	
+<!-- Notes at End of Article: Could be "Note in Proof" -->
+<!ELEMENT notes (p*, sec*)>
+
+<!-- ***************** Appendix Elements ***************** -->
+<!-- Appendix Matter -->
+<!ELEMENT appm (st?, p*, app+)>
+
+<!-- Appendix -->
+<!ELEMENT app (st?, p*, sec*)>
+<!ATTLIST app
+	%id-att;>
+	
+<!-- Reference Group -->
+<!ELEMENT refgrp (st?, p?, bibl+)>
+
+
+<!-- Footnote -->
+<!ELEMENT fn (p+)>
+<!ATTLIST fn
+	%id-att;>
+
+
+<!-- ************ Figure and Table Elements ***************** -->
+
+<!-- Table -->
+<!ELEMENT tbl (title?, caption?, (tblbdy | graphic)*, tblfn*)>
+<!ATTLIST tbl
+	%id-att-required;>
+<!-- id of table should begin with "T" (T1, TIV, T43) -->
+
+<!-- Array - an array is tabular material displayed inline -->
+<!ELEMENT array (title?, caption?, (tblbdy | graphic)*, tblfn*) >
+<!ATTLIST array
+	%id-att;>
+
+
+
+
+
+<!-- Table Body -->
+<!ELEMENT tblbdy (r+)>
+<!ATTLIST tblbdy
+	ra CDATA #IMPLIED
+	ca (left | center | middle |  right) #IMPLIED
+	cols CDATA #REQUIRED>
+<!-- attributes: ra, row alignment; ca, cell/column alignment; cols, no of columns -->
+	
+<!-- Table rows -->
+<!ELEMENT r (c*)>
+<!ATTLIST r
+	ra (top | center | middle | bottom) #IMPLIED >
+	
+<!-- Table cells -->
+<!--
+     hr - outputs a line!!
+     cspan - number of columns to span
+     rspan - number of rows to span
+     indent - specifies an indent level (currently only supports '1')
+     ca - column alignment
+-->
+<!ELEMENT c (hr | p*)>
+<!ATTLIST c
+	cspan CDATA #IMPLIED
+	rspan CDATA #IMPLIED
+	indent CDATA #IMPLIED
+	ca (left | center | right | decimal) #IMPLIED >
+	
+<!ELEMENT hr EMPTY>
+
+<!-- line break -->
+<!ELEMENT break EMPTY> 
+
+<!-- Table Footnote -->
+<!ELEMENT tblfn (p+)>
+<!ATTLIST tblfn
+	%id-att; >
+	
+	
+<!-- Caption (figure / table) -->
+<!--
+     Descriptive title for figure / table
+     - for figures, this should be the first sentence of the caption / text.
+     (this is used when rendering thumbnails ;-)
+-->
+<!ELEMENT caption (p+)>
+
+	
+<!-- Figure -->
+<!ELEMENT fig (title?, caption?, text?, (graphic | media)*)>
+<!ATTLIST fig
+	%id-att-required; >
+<!-- id of figure should begin with "F" (F1, F2, FIII) -->
+	
+<!-- Main text / caption for the figure: this includes the first sentence
+that was pulled out for the "caption" element -->
+<!ELEMENT text (p+)>
+
+<!ELEMENT graphic EMPTY>
+<!-- NOTE: Inside a fig tag, do NOT include the extension, outside a fig 
+tag (inline image) include the extension -->
+<!ATTLIST graphic
+	file CDATA #REQUIRED
+	%id-att; 
+	hint.layout (single | double | landscape) #IMPLIED
+	hint.detail CDATA #IMPLIED >
+	
+<!ELEMENT media (graphic?)>
+<!ATTLIST media
+	file CDATA #REQUIRED
+	mime-subtype CDATA #IMPLIED >
+	
+	
+<!-- Supplementary Material -->
+<!ELEMENT suppl (anchor*, ((title?, caption?, text?, file*) | exlnk))>
+<!ATTLIST suppl
+	%id-att; >
+	
+<!ELEMENT anchor (%data;)*>
+<!ATTLIST anchor
+	type (fig | tab | toc) #REQUIRED
+	id CDATA #IMPLIED
+	part CDATA #IMPLIED >	
+<!-- ID for the supplementary material, ie. SD1, SD2, SD3 -->
+
+<!ELEMENT file (sec | p)*>
+<!ATTLIST file
+	name CDATA #IMPLIED
+	filetype CDATA #IMPLIED
+ >
+
+<!--
+	filetype NOTATION (asf | au | avi | csv | cyto | exe | fas | gz | hqz | hlp | idl | bmp | dat | doc | gif | html | 
+	jar | jpeg | jpg | map | mdb | midi | mm | mov | mp3 | mpeg | p01 | pdf | pl | pop | ppt | ps | qtx | raw | ra | rm | rtf | 
+	rv | sgml | swf | tar | tex | tiff | txt | wav | wpd | xls | zip |
+	
+ASF | AU | AVI | CSV | CYTO | EXE | FAS | GZ | HQZ | HLP | IDL | BMP | DAT | DOC | GIF | HTML | 
+	JAR | JPEG | JPG | MAP | MDB | MIDI | MM | MOV | MP3 | MPEG | P01 | PDF | PL | POP | PPT | PS | QTX | RAW | RA | RM | RTF | 
+	RV | SGML | SWF | TAR | TEX | TIFF | TXT | WAV | WPD | XLS | ZIP 	
+	
+	) #IMPLIED
+-->
+	
+<!-- External links -->
+<!ELEMENT exlnk (%data;)*>
+<!-- ext. link (Medline, Genbank) -->
+<!ATTLIST exlnk
+	access CDATA #IMPLIED
+	type (article | company | doi | ec |emblalign| ftp | gen | genpept | geo | highwire | 
+	medline | pdb | pgr | pir | pmc | url | pirdb | sprot) #REQUIRED 
+	linktype CDATA #IMPLIED 
+	vol CDATA #IMPLIED
+	pg CDATA #IMPLIED 
+	valid_as_of  CDATA  #IMPLIED	>
+	
+<!-- linktype attributes 
+	correction		used in an article to link to its associated correction
+	retraction		used in an article to link to its associated retraction
+	commentary		used in an article to link to its associated commentary	
+	companion		used in an article to link to a companion (sibling) article
+	corrected.art	used in a correction to link to the article being corrected
+	retracted.art	used in a retraction to link to the article being retracted
+	comp2comment	used in a commentary to link to the article being commented upon
+	articleref		used to link to an article mentioned in text. no back link
+	-->
+	
+	
+<!-- EXLNK TYPES
+	article       link to a related article
+	company   supplier link
+	ec             enzyme nomenclature - see http://www.chem.qmw.ac.uk/iubmb/enzyme/
+	ftp            file transfer protocol
+	gen           GenBank
+	genpept
+	geo			Gene Expression Omnibus
+	highwire   highwire press intrajournal link
+	medline	    medline or pubmed id
+	pdb          protein data bank - see http://www.rcsb.org/pdb/
+	pgr		plant gene register  - see http://www.tarweed.com/pgr/
+	pir		Protein Information Resource - see http://pir.georgetown.edu
+	pirdb		Protein Information Resource - see http://pir.georgetown.edu
+	pmc		used to link between articles in PubMedCentral access is PMID
+	sprot		Swiss-Prot - see http://www.ebi.ac.uk/swissprot/
+	url	            website
+	
+-->
+
+
+
+<!-- ***************** Intra-article References ************************-->
+
+<!-- Figure Reference -->
+<!-- Text contained between open and close tags is linked -->
+<!-- Specify the number of the figure
+     ie. Fig <figr fid="F1">1</figr>
+     NOT Fig <figr fid="F1"> -->
+<!ELEMENT figr (#PCDATA | it | b | sup| sub)*>
+<!ATTLIST figr
+		%figr-atts;>
+
+<!-- Table reference -->
+<!-- Text contained between open and close tags is linked -->
+<!-- Specify the number of the table
+     ie. Table <tblr tid="T1">1</tblr>
+     NOT Table <tblr tid="T1"> -->
+<!ELEMENT tblr (#PCDATA | it )*>
+<!ATTLIST tblr
+		%tblr-atts;>
+
+<!-- Array reference -->
+<!-- Text contained between open and close tags is linked -->
+<!-- Specify the number of the table
+     ie. Table <tblr tid="T1">1</tblr>
+     NOT Table <tblr tid="T1"> -->
+<!ELEMENT arrayr (#PCDATA | it )*>
+<!ATTLIST arrayr
+		%tblr-atts;>
+
+<!-- Bibliographic reference -->
+<!-- Text contained between open and close tags is linked -->
+<!-- Always explicitly put links for each reference, do NOT use ranges
+     ie. [<abbr bid="B1">1</abbr>,<abbr bid="B2">2</abbr>,<abbr bid="B3">3</abbr>]
+     NOT [<abbr bid="B1">1</abbr>-<abbr bid="B3">3</abbr>] -->
+<!ELEMENT abbr (#PCDATA | sup | sub | it | sc | b | entitygrp | ul)*>
+<!ATTLIST abbr
+		%abbr-atts;>
+
+<!-- Author Note Reference -->
+<!-- Text contained between open and close tags is linked -->
+<!ELEMENT anr (#PCDATA)>
+<!ATTLIST anr
+		%rid-atts; >
+	
+<!-- For rid, use "FN" followed by a value
+from the FOOTNOTE/AFFILIATION SYMBOLS table below -->
+
+<!-- Instition Reference (author affiliation) -->
+<!ELEMENT insr (#PCDATA)>
+<!ATTLIST insr
+		%insr-atts; >
+
+<!-- iid is used to identify author/institution affiliations
+For institution references, use "O" (cap oh) followed by a value
+from the FOOTNOTE/AFFILIATION SYMBOLS table below -->
+
+<!-- Footnote Reference -->
+<!-- Text contained between open and close tags is linked -->
+<!ELEMENT fnr (#PCDATA)>
+<!ATTLIST fnr
+		%fnr-atts; >
+
+<!-- For rid, use "FN" followed by a value
+from the FOOTNOTE/AFFILIATION SYMBOLS table below -->
+
+<!-- Displayed Formula Reference -->
+<!-- Text contained between open and close tags is linked -->
+<!ELEMENT fdr (#PCDATA)>
+<!ATTLIST fdr
+	 rid     CDATA       #REQUIRED
+	 to      CDATA       #IMPLIED>
+
+
+<!-- Supplementary Material Reference -->
+<!-- Text contained between open and close tags is linked -->
+<!ELEMENT supplr (#PCDATA | it)*>
+<!ATTLIST supplr
+		%supplr-atts; >
+
+<!-- Table Footnote Reference -->
+<!ELEMENT tblfnr (#PCDATA)>
+<!ATTLIST tblfnr
+		%rid-atts; >
+	
+<!-- Section Reference -->
+<!ELEMENT secr (#PCDATA)>
+<!ATTLIST secr
+		%secr-atts;>
+	
+<!-- Appendix Reference -->
+<!ELEMENT appr (%data;)*>
+<!ATTLIST appr
+		%rid-atts; >
+
+
+
+
+<!-- VALUES OF FOOTNOTE/AFFILIATION SYMBOLS
+
+a-z (ie FNa)  - superior letter
+1-9 (ie FN1)  - superior number
+
+Following is a list of symbols. The ID should be the prefix
+followed by "x" and a two-digit number (FNx01).
+x01 - asterisk
+x02 - single dagger
+x03 - double dagger
+x04 - section mark
+x05 - pgraph mark
+x06 - double vertical (parallel)
+x07 - superior #
+x08 - two asterisks
+x09 - two single daggers
+x10 - two section marks
+x11 - two pgraph marks
+x12 - two double daggers
+x14 - two double vertical (parallel)
+x15 - superior @
+x16 - double pound sign
+x17 - double @ sign
+x18 - three asterisks
+x19 - three plus signs
+x20 - three double daggers
+x21 - three section marks
+x22 - three double vertical
+x23 - three pgraph marks
+x24 - three pound signs
+x25 - three @ signs
+x26 - three single daggers
+-->
+
+
+
+<!-- ============================================================= -->
+<!--                    MATH: MATHML MODULES                       -->
+<!-- ============================================================= -->
+
+
+<!--                    MATHML SETUP MODULE                        -->
+<!--                    Called from the DTD to include the MathML
+                        elements in the tag set.                   -->
+<!ENTITY % mathmlsetup.ent 
+                        PUBLIC
+"-//NLM//DTD Archiving and Interchange DTD Suite MathML Setup Module v1.1 20031101//EN"
+"pmc1-mathml/mathmlsetup.ent"                                             >
+
+<!--                    MATHML SETUP MODULE                        -->
+<!--                    Invoke the MathML modules                  -->
+%mathmlsetup.ent;                                            
+
diff --git a/dtd/pubmed_020114.dtd b/dtd/pubmed_020114.dtd
new file mode 100644
index 0000000..1538918
--- /dev/null
+++ b/dtd/pubmed_020114.dtd
@@ -0,0 +1,61 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubMedArticle Set.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+
+        
+
+
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Nov 2001//EN"
+      "nlmmedline_011101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid">
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | 
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubMedArticle|PubmedArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubMedArticle ((NCBIArticle | MedlineCitation), PubmedData?)>
+<!ELEMENT PubmedArticle ((NCBIArticle | MedlineCitation), PubmedData?)>
+<!-- ================================================================= -->
+<!ELEMENT PubMedData (History*, PublicationStatus, ProviderId?, ArticleIdList, URL*)>
+<!ELEMENT PubmedData (History*, PublicationStatus, ProviderId?, ArticleIdList, URL*)>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ProviderId (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_080101.dtd b/dtd/pubmed_080101.dtd
new file mode 100644
index 0000000..11d6184
--- /dev/null
+++ b/dtd/pubmed_080101.dtd
@@ -0,0 +1,71 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_080101.dtd 143882 2008-10-23 15:38:53Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2008//EN"
+      "nlmmedline_080101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid">
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle ((NCBIArticle | MedlineCitation), PubmedData?)>
+<!-- ================================================================= -->
+<!ELEMENT PubmedData (History*, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_090101.dtd b/dtd/pubmed_090101.dtd
new file mode 100644
index 0000000..ea1ea8f
--- /dev/null
+++ b/dtd/pubmed_090101.dtd
@@ -0,0 +1,71 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_090101.dtd,v 1.1 2008-12-13 18:18:29 peterc Exp $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2009//EN"
+      "nlmmedline_090101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid">
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle ((NCBIArticle | MedlineCitation), PubmedData?)>
+<!-- ================================================================= -->
+<!ELEMENT PubmedData (History*, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_100101.dtd b/dtd/pubmed_100101.dtd
new file mode 100644
index 0000000..62b71f8
--- /dev/null
+++ b/dtd/pubmed_100101.dtd
@@ -0,0 +1,72 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_100101.dtd 176747 2009-11-20 16:10:39Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2010//EN"
+      "nlmmedlinecitationset_100101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid">
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_100301.dtd b/dtd/pubmed_100301.dtd
new file mode 100644
index 0000000..adc5272
--- /dev/null
+++ b/dtd/pubmed_100301.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_100301.dtd 185906 2010-03-16 14:08:30Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Mar 2010//EN"
+      "nlmmedlinecitationset_100301.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Mar 2010//EN" "bookdoc_100301.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_110101.dtd b/dtd/pubmed_110101.dtd
new file mode 100644
index 0000000..6298eb6
--- /dev/null
+++ b/dtd/pubmed_110101.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_110101.dtd 204806 2010-09-10 17:50:53Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2011//EN"
+      "nlmmedlinecitationset_110101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Jan 2011//EN" "bookdoc_110101.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_120101.dtd b/dtd/pubmed_120101.dtd
new file mode 100644
index 0000000..dacafb8
--- /dev/null
+++ b/dtd/pubmed_120101.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_120101.dtd 340769 2011-10-12 20:01:45Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2012//EN"
+      "nlmmedlinecitationset_120101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Jan 2012//EN" "bookdoc_120101.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_130101.dtd b/dtd/pubmed_130101.dtd
new file mode 100644
index 0000000..82bd9c6
--- /dev/null
+++ b/dtd/pubmed_130101.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_130101.dtd 375370 2012-09-19 16:51:36Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2013//EN"
+      "nlmmedlinecitationset_130101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param (#PCDATA)>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Jan 2013//EN" "bookdoc_130101.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_130501.dtd b/dtd/pubmed_130501.dtd
new file mode 100644
index 0000000..a3c640c
--- /dev/null
+++ b/dtd/pubmed_130501.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_130501.dtd 404126 2013-06-20 17:36:43Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 May 2013//EN"
+      "nlmmedlinecitationset_130501.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | ecollection | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param %text;>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Jan 2013//EN" "bookdoc_130101.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_140101.dtd b/dtd/pubmed_140101.dtd
new file mode 100644
index 0000000..4570815
--- /dev/null
+++ b/dtd/pubmed_140101.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_140101.dtd 413871 2013-09-18 19:22:41Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2014//EN"
+      "nlmmedlinecitationset_140101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | ecollection | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param %text;>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Jan 2014//EN" "bookdoc_140101.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_150101.dtd b/dtd/pubmed_150101.dtd
new file mode 100644
index 0000000..7c0933d
--- /dev/null
+++ b/dtd/pubmed_150101.dtd
@@ -0,0 +1,79 @@
+<!--    
+	   This is the Current DTD which NLM has written for 
+        External  Use.  If you are a NCBI User, use the information
+        from the PubmedArticleSet.
+
+        Comments and suggestions are welcome.
+        (May 9, 2000)
+	
+        Corrections:
+        ~~~~~~~~~~~
+        Oct. 09 2002 
+        - "PubMedArticle" has been renamed to "PubmedArticle"
+        - All referencies to "PubMedArticle" has been removed
+        - "ProviderId" has been removed from PubmedData
+        - "URL" has been removed from PubmdeData
+		
+		$Id: pubmed_150101.dtd 447938 2014-10-01 17:41:38Z korobtch $
+        
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!-- Reference to Where the MEDLINECITATION DTD is located  -->
+<!ENTITY % Medline PUBLIC "-//NLM//DTD Medline, 01 Jan 2015//EN"
+      "nlmmedlinecitationset_150101.dtd">
+%Medline;
+<!-- ================================================================= -->
+<!ENTITY % ArticleTitle.Ref "ArticleTitle">
+<!ENTITY % ISSN.Ref "ISSN?">
+<!ENTITY % Pub.Date.Ref "PubDate?">
+<!ENTITY % iso.language.codes "(AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                                   HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                                   PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                                   VI|ZH)">
+<!ENTITY % pub.status.int "pmc | pmcr | pubmed | pubmedr | 
+                             premedline | medline | medliner | entrez | pmc-release">
+<!ENTITY % pub.status "(received | accepted | epublish | 
+                              ppublish | revised | aheadofprint | 
+                              retracted | ecollection | %pub.status.int;)">
+<!ENTITY % art.id.type.int "pubmed | medline | pmcid | pmcbook | bookaccession">
+							
+<!ENTITY % art.id.type "(doi | pii | pmcpid | pmpid | pmc | mid |
+                              sici | %art.id.type.int;)">
+<!-- ================================================================= -->
+<!ELEMENT PubmedArticleSet (PubmedArticle | PubmedBookArticle)+>
+<!-- ================================================================= -->
+<!-- This is the top level element for PubMedArticle -->
+<!ELEMENT PubmedArticle (MedlineCitation, PubmedData?)>
+<!-- ================================================================= -->
+<!ENTITY % normal.date "Year, Month, Day, (Hour, (Minute, Second?)?)?">
+<!ELEMENT PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+<!ELEMENT PubMedPubDate (%normal.date;)>
+<!ATTLIST PubMedPubDate
+	PubStatus %pub.status; #REQUIRED
+>
+<!ELEMENT PublicationStatus (#PCDATA)>
+<!ELEMENT ArticleIdList (ArticleId+)>
+<!ELEMENT ArticleId (#PCDATA)>
+<!ATTLIST ArticleId
+	IdType %art.id.type; "pubmed"
+>
+<!ELEMENT History (PubMedPubDate+)>
+<!ELEMENT URL (#PCDATA)>
+<!ATTLIST URL
+	lang %iso.language.codes; #IMPLIED
+	Type ( FullText | Summary | fulltext | summary) #IMPLIED
+>
+<!ELEMENT ObjectList (Object)+>
+<!ELEMENT Object (Param)*>
+<!ATTLIST Object Type CDATA #REQUIRED>
+<!ELEMENT Param %text;>
+<!ATTLIST Param Name CDATA #REQUIRED>
+<!ELEMENT Hour (#PCDATA)>
+<!ELEMENT Minute (#PCDATA)>
+<!ELEMENT Second (#PCDATA)>
+
+<!-- ================================================================= -->
+<!ENTITY % Bookdoc PUBLIC "-//NLM//DTD Bookdoc, 01 Jan 2015//EN" "bookdoc_150101.dtd">
+%Bookdoc;
+<!-- ================================================================= -->
diff --git a/dtd/pubmed_180101.dtd b/dtd/pubmed_180101.dtd
new file mode 100644
index 0000000..48bec8a
--- /dev/null
+++ b/dtd/pubmed_180101.dtd
@@ -0,0 +1,434 @@
+<!--
+
+2017-10-06
+
+This DTD supports both the E-utilities and ftp service data dissemination methods. 
+It is based on http://dtd.nlm.nih.gov/ncbi/pubmed/out/pubmed_170101.dtd
+
+Additions/Changes since 170101 DTD: 
+
+	1.  Added Organism to the allowed values for SupplMeshName @Type
+	2.  Deleted DateCreated
+
+	NOTE:  The use of "Medline" in a DTD or element name does not mean the record
+	represents a citation from a MEDLINE-selected journal.  When the NLM DTDs and
+	XML elements were first created, MEDLINE records were the only data exported.
+	Now NLM exports citations other than MEDLINE records using these tools. To
+	minimize unnecessary disruption to users of the data and tools, NLM has
+	retained the original DTD and element names (e.g., MedlineTA, MedlineJournalInfo). 
+ 
+	NOTE:  StartPage and EndPage in Pagination element are not currently used; are 
+	reserved for future use. 
+
+	* = 0 or more occurrences (optional element, repeatable)
+	? = 0 or 1 occurrences (optional element, at most 1)
+	+ = 1 or more occurrences (required element, repeatable)
+	| = choice, one or the other but not both
+	no symbol = required element
+
+       -->
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!ENTITY % text             "(#PCDATA | b | i | sup | sub | u)*" >
+
+ <!ENTITY % booklinkatts
+			 "book		CDATA			#IMPLIED
+			 part		CDATA			#IMPLIED
+			sec		CDATA			#IMPLIED"  >
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+
+<!--  ================= Set-level elements ============================-->
+<!ELEMENT	PubmedArticleSet ((PubmedArticle | PubmedBookArticle)+, DeleteCitation?) >
+
+<!ELEMENT	BookDocumentSet (BookDocument*, DeleteDocument?) >
+
+<!ELEMENT	PubmedBookArticleSet (PubmedBookArticle*)>
+
+
+
+<!--  ============= Document-level elements ============================-->
+<!ELEMENT	PubmedArticle (MedlineCitation, PubmedData?)>
+
+<!ELEMENT	PubmedBookArticle (BookDocument, PubmedBookData?)>
+
+<!ELEMENT	BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, InvestigatorList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?, ItemList*) >
+
+<!ELEMENT	DeleteCitation (PMID+) >
+
+<!ELEMENT	DeleteDocument (PMID*) >
+
+
+<!--  =============== Sub-Document wrapper elements =====================-->
+<!ELEMENT	MedlineCitation (PMID, DateCompleted?, DateRevised?, Article, 
+                             MedlineJournalInfo, ChemicalList?, SupplMeshList?,CitationSubset*, 
+                             CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
+                             NumberOfReferences?, PersonalNameSubjectList?, OtherID*, OtherAbstract*, 
+                             KeywordList*, CoiStatement?, SpaceFlightMission*, InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+		Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE |  In-Data-Review | Publisher | 
+		        MEDLINE | OLDMEDLINE) #REQUIRED 
+		VersionID CDATA #IMPLIED
+		VersionDate CDATA #IMPLIED 
+		IndexingMethod    CDATA  #IMPLIED >
+
+<!ELEMENT	PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?) >
+
+<!ELEMENT	PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | ELocationID+),
+                     Abstract?,AuthorList?, Language+, DataBankList?, GrantList?,
+                     PublicationTypeList, VernacularTitle?, ArticleDate*) >
+<!ATTLIST	Article 
+		    PubModel (Print | Print-Electronic | Electronic | Electronic-Print | Electronic-eCollection) #REQUIRED >
+		
+
+
+
+<!-- ================================================================= -->
+<!--  Everything else in alphabetical order                            -->
+<!-- ================================================================= -->
+
+<!ELEMENT	Abstract (AbstractText+, CopyrightInformation?)>
+
+<!ELEMENT	AbstractText %text;>
+<!ATTLIST	AbstractText
+		    Label CDATA #IMPLIED
+		    NlmCategory (BACKGROUND | OBJECTIVE | METHODS | RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED >
+		
+<!ELEMENT	AccessionNumber (#PCDATA) >
+
+<!ELEMENT	AccessionNumberList (AccessionNumber+) >
+
+<!ELEMENT	Acronym (#PCDATA) >
+
+<!ELEMENT	Affiliation %text;>
+
+<!ELEMENT	AffiliationInfo (Affiliation, Identifier*)>
+
+<!ELEMENT	Agency (#PCDATA) >
+
+<!ELEMENT	ArticleDate (Year, Month, Day) >
+<!ATTLIST	ArticleDate 
+            DateType CDATA  #FIXED "Electronic" >
+ 
+<!ELEMENT	ArticleId (#PCDATA) >
+<!ATTLIST   ArticleId
+	        IdType (doi | pii | pmcpid | pmpid | pmc | mid |
+                   sici | pubmed | medline | pmcid | pmcbook | bookaccession) "pubmed" >
+	      
+ <!ELEMENT	ArticleIdList (ArticleId+)>
+
+<!ELEMENT	ArticleTitle %text;>
+<!ATTLIST   ArticleTitle	%booklinkatts; >
+
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName), Identifier*, AffiliationInfo*) >
+<!ATTLIST	Author 
+            ValidYN (Y | N) "Y" 
+            EqualContrib    (Y | N)  #IMPLIED >
+            
+<!ELEMENT	AuthorList (Author+) >
+<!ATTLIST	AuthorList 
+            CompleteYN (Y | N) "Y" 
+            Type ( authors | editors )  #IMPLIED >
+
+<!ELEMENT	b		%text; > <!-- bold -->
+
+<!ELEMENT	BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, InvestigatorList?, Volume?, 
+                    VolumeTitle?, Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+
+<!ELEMENT	BookTitle      %text; >
+<!ATTLIST   BookTitle	%booklinkatts; >
+
+<!ELEMENT	Chemical (RegistryNumber, NameOfSubstance) >
+
+<!ELEMENT	ChemicalList (Chemical+) >
+
+<!ELEMENT	CitationString      %text; >
+
+<!ELEMENT	CitationSubset (#PCDATA) >
+
+<!ELEMENT   CoiStatement    %text; >
+
+<!ELEMENT	CollectionTitle      %text; >
+<!ATTLIST   CollectionTitle	%booklinkatts; >
+
+<!ELEMENT	CollectiveName %text; >
+
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?) >
+<!ATTLIST	CommentsCorrections 
+		     RefType (AssociatedDataset | AssociatedPublication | CommentOn | CommentIn | ErratumIn | 
+		             ErratumFor | ExpressionOfConcernIn | ExpressionOfConcernFor | 
+		             RepublishedFrom | RepublishedIn | 
+		             RetractionOf | RetractionIn | UpdateIn | UpdateOf | SummaryForPatientsIn | 
+		             OriginalReportIn | ReprintOf | ReprintIn | Cites)      #REQUIRED    >
+		             
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+) >
+
+<!ELEMENT	ContractNumber (#PCDATA) >
+
+<!ELEMENT	ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	CopyrightInformation (#PCDATA) >
+
+<!ELEMENT	Country (#PCDATA) >
+
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?) >
+
+<!ELEMENT	DataBankList (DataBank+) >
+
+<!ATTLIST	DataBankList 
+            CompleteYN (Y | N) "Y" >
+            
+<!ELEMENT	DataBankName (#PCDATA) >
+
+<!ELEMENT	DateCompleted (Year,Month,Day) >
+
+<!ELEMENT	DateRevised (Year,Month,Day) >
+
+<!ELEMENT	Day (#PCDATA )>
+
+<!ELEMENT	DescriptorName (#PCDATA) >
+<!ATTLIST	DescriptorName 
+		    MajorTopicYN (Y | N) "N"
+		    Type (Geographic) #IMPLIED
+		     UI CDATA #REQUIRED >
+
+<!ELEMENT	Edition (#PCDATA) >
+
+<!ELEMENT	ELocationID (#PCDATA) >
+<!ATTLIST	ELocationID 
+            EIdType (doi | pii) #REQUIRED 
+		    ValidYN  (Y | N) "Y">
+
+<!ELEMENT	EndingDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	EndPage (#PCDATA) >
+
+<!ELEMENT	ForeName (#PCDATA) >
+
+<!ELEMENT	GeneSymbol (#PCDATA) >
+
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+
+<!ELEMENT	GeneralNote (#PCDATA) >
+<!ATTLIST	GeneralNote
+		     Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM" >
+		     
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+
+<!ELEMENT	GrantID (#PCDATA) >
+
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList 
+            CompleteYN (Y | N) "Y">
+   
+<!ELEMENT	History (PubMedPubDate+) >
+
+<!ELEMENT	Hour (#PCDATA) >
+
+<!ELEMENT	i		%text; > <!-- italic -->
+
+<!ELEMENT	Identifier (#PCDATA) >
+<!ATTLIST	Identifier 
+		    Source CDATA #REQUIRED >
+		    
+<!ELEMENT	Initials (#PCDATA) >
+
+<!ELEMENT	Investigator (LastName, ForeName?, Initials?, Suffix?, Identifier*, AffiliationInfo*) >
+<!ATTLIST	Investigator 
+		    ValidYN (Y | N) "Y" >
+		    
+<!ELEMENT	InvestigatorList (Investigator+) >
+
+<!ELEMENT	Isbn (#PCDATA) >
+
+<!ELEMENT	ISOAbbreviation (#PCDATA) >
+
+<!ELEMENT	ISSN (#PCDATA) >
+<!ATTLIST	ISSN 
+		    IssnType  (Electronic | Print) #REQUIRED >
+		    
+<!ELEMENT	ISSNLinking (#PCDATA) >
+
+<!ELEMENT	Issue (#PCDATA) >
+<!ELEMENT	Item (#PCDATA)>
+
+<!ELEMENT	ItemList (Item+)>
+<!ATTLIST   ItemList 
+            ListType CDATA #REQUIRED>
+
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate) >
+<!ATTLIST	JournalIssue 
+		    CitedMedium (Internet | Print) #REQUIRED >
+		    
+<!ELEMENT	Keyword %text;>
+<!ATTLIST	Keyword 
+		    MajorTopicYN (Y | N) "N" >
+		    
+<!ELEMENT	KeywordList (Keyword+) >
+<!ATTLIST	KeywordList 
+		    Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM" >
+		    
+<!ELEMENT	Language (#PCDATA) >
+
+<!ELEMENT	LastName (#PCDATA) >
+
+<!ELEMENT	LocationLabel		(#PCDATA)>
+<!ATTLIST   LocationLabel
+			Type  (part|chapter|section|appendix|figure|table|box)  #IMPLIED >
+
+<!ELEMENT	Medium (#PCDATA) >
+
+<!ELEMENT	MedlineDate (#PCDATA) >
+
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?, ISSNLinking?) >
+
+<!ELEMENT	MedlinePgn (#PCDATA) >
+
+<!ELEMENT	MedlineTA (#PCDATA) >
+
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+
+<!ELEMENT	Minute (#PCDATA) >
+
+<!ELEMENT	Month (#PCDATA) >
+
+<!ELEMENT	NameOfSubstance (#PCDATA) >
+<!ATTLIST	NameOfSubstance 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	NlmUniqueID (#PCDATA) >
+
+<!ELEMENT	Note (#PCDATA) >
+
+<!ELEMENT	NumberOfReferences (#PCDATA) >
+
+<!ELEMENT	Object (Param*)>
+<!ATTLIST	Object 
+          Type CDATA #REQUIRED >
+  
+<!ELEMENT	ObjectList (Object+) >
+
+<!ELEMENT	OtherAbstract (AbstractText+, CopyrightInformation?) >
+
+<!ATTLIST	OtherAbstract 
+		    Type (AAMC | AIDS | KIE | PIP | NASA | Publisher) #REQUIRED
+		    Language CDATA "eng" >
+		    
+<!ELEMENT	OtherID (#PCDATA) >
+<!ATTLIST	OtherID 
+		    Source (NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML |
+		            NRCBL | NLM | QCIM) #REQUIRED >
+		            
+<!ELEMENT	PMID (#PCDATA) >
+<!ATTLIST	PMID 
+		    Version CDATA #REQUIRED >
+		    
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn) >
+
+<!ELEMENT	Param %text;>
+<!ATTLIST	Param 
+             Name CDATA #REQUIRED >
+          
+<!ELEMENT	PersonalNameSubject (LastName, ForeName?, Initials?, Suffix?) >
+
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+) >
+
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate) >
+
+<!ELEMENT	PublicationStatus (#PCDATA) >
+
+<!ELEMENT	PublicationType (#PCDATA) >
+<!ATTLIST	PublicationType 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	PublicationTypeList (PublicationType+) >
+
+<!ELEMENT   PubMedPubDate (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ATTLIST   PubMedPubDate
+    	     PubStatus (received | accepted | epublish | 
+                      ppublish | revised | aheadofprint | 
+                      retracted | ecollection | pmc | pmcr | pubmed | pubmedr | 
+                      premedline | medline | medliner | entrez | pmc-release) #REQUIRED >
+
+<!ELEMENT	Publisher (PublisherName, PublisherLocation?) >
+
+<!ELEMENT	PublisherLocation (#PCDATA) >
+
+<!ELEMENT	PublisherName      %text; >
+
+<!ELEMENT	QualifierName (#PCDATA) >
+<!ATTLIST	QualifierName 
+		    MajorTopicYN (Y | N) "N"
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	RefSource (#PCDATA) >
+
+<!ELEMENT	RegistryNumber (#PCDATA) >
+
+<!ELEMENT	ReportNumber (#PCDATA) >
+
+<!ELEMENT	Season (#PCDATA) >
+
+<!ELEMENT	Second (#PCDATA) >
+
+
+<!ELEMENT	Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT	Sections	(Section+) >
+
+<!ELEMENT	SectionTitle	%text; >
+<!ATTLIST   SectionTitle	%booklinkatts; >
+
+<!ELEMENT	SpaceFlightMission (#PCDATA) >
+
+<!ELEMENT	StartPage (#PCDATA) >
+
+<!ELEMENT	sub	%text; > <!-- subscript -->
+
+<!ELEMENT	Suffix %text;>
+
+<!ELEMENT	sup	%text; > <!-- superscript -->
+
+<!ELEMENT	SupplMeshList (SupplMeshName+)>
+
+<!ELEMENT	SupplMeshName (#PCDATA) >
+<!ATTLIST	SupplMeshName 
+		    Type (Disease | Protocol | Organism) #REQUIRED
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	Title (#PCDATA) >
+
+<!ELEMENT	u		%text; > <!-- underline -->                              
+
+<!ELEMENT	URL (#PCDATA) >
+<!ATTLIST	URL
+	      lang (AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                            HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                            PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                           VI|ZH) #IMPLIED
+	      Type ( FullText | Summary | fulltext | summary) #IMPLIED >
+	      
+<!ELEMENT	VernacularTitle %text; >
+
+<!ELEMENT	Volume (#PCDATA) >
+
+<!ELEMENT	VolumeTitle %text; >
+
+<!ELEMENT	Year (#PCDATA) >
+
+
+
+
+
+
diff --git a/dtd/pubmed_180601.dtd b/dtd/pubmed_180601.dtd
new file mode 100644
index 0000000..aab61e7
--- /dev/null
+++ b/dtd/pubmed_180601.dtd
@@ -0,0 +1,454 @@
+<!--
+
+2017-10-06
+
+This DTD supports both the E-utilities and ftp service data dissemination methods. 
+It is based on http://dtd.nlm.nih.gov/ncbi/pubmed/out/pubmed_180101.dtd
+
+Additions/Changes since 180101 DTD: 
+
+	1.  Added MathML3 
+	2.  Allowed <mml:math> in <AbstractText>, <ArticleTitle>, <BookTitle>, <CollectionTitle>, 
+	     <Keyword>, <VernacularTitle>.
+
+	NOTE:  The use of "Medline" in a DTD or element name does not mean the record
+	represents a citation from a MEDLINE-selected journal.  When the NLM DTDs and
+	XML elements were first created, MEDLINE records were the only data exported.
+	Now NLM exports citations other than MEDLINE records using these tools. To
+	minimize unnecessary disruption to users of the data and tools, NLM has
+	retained the original DTD and element names (e.g., MedlineTA, MedlineJournalInfo). 
+ 
+	NOTE:  StartPage and EndPage in Pagination element are not currently used; are 
+	reserved for future use. 
+
+	* = 0 or more occurrences (optional element, repeatable)
+	? = 0 or 1 occurrences (optional element, at most 1)
+	+ = 1 or more occurrences (required element, repeatable)
+	| = choice, one or the other but not both
+	no symbol = required element
+
+       -->
+       
+<!-- ============================================================= -->
+<!--                     MATHML 3.0 SETUP                        -->
+<!-- ============================================================= -->
+<!--                    MATHML SETUP FILE                 -->
+<!ENTITY % mathml-in-pubmed     SYSTEM        "mathml-in-pubmed.mod"               >	
+%mathml-in-pubmed;
+
+
+		 
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!ENTITY % text             "#PCDATA | b | i | sup | sub | u" >
+
+ <!ENTITY % booklinkatts
+			 "book		CDATA			#IMPLIED
+			 part		CDATA			#IMPLIED
+			sec		CDATA			#IMPLIED"  >
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+
+<!--  ================= Set-level elements ============================-->
+<!ELEMENT	PubmedArticleSet ((PubmedArticle | PubmedBookArticle)+, DeleteCitation?) >
+<!ATTLIST       PubmedArticleSet
+>
+
+<!ELEMENT	BookDocumentSet (BookDocument*, DeleteDocument?) >
+<!ATTLIST       BookDocumentSet
+>
+
+<!ELEMENT	PubmedBookArticleSet (PubmedBookArticle*)>
+<!ATTLIST       PubmedBookArticleSet
+>
+
+
+<!--  ============= Document-level elements ============================-->
+<!ELEMENT	PubmedArticle (MedlineCitation, PubmedData?)>
+<!ATTLIST       PubmedArticle
+>
+
+<!ELEMENT	PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ATTLIST       PubmedBookArticle
+>
+
+<!ELEMENT	BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, InvestigatorList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, CitationString?, GrantList?, ItemList*) >
+
+<!ELEMENT	DeleteCitation (PMID+) >
+
+<!ELEMENT	DeleteDocument (PMID*) >
+
+
+<!--  =============== Sub-Document wrapper elements =====================-->
+<!ELEMENT	MedlineCitation (PMID, DateCompleted?, DateRevised?, Article, 
+                             MedlineJournalInfo, ChemicalList?, SupplMeshList?,CitationSubset*, 
+                             CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
+                             NumberOfReferences?, PersonalNameSubjectList?, OtherID*, OtherAbstract*, 
+                             KeywordList*, CoiStatement?, SpaceFlightMission*, InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+		Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE |  In-Data-Review | Publisher | 
+		        MEDLINE | OLDMEDLINE) #REQUIRED 
+		VersionID CDATA #IMPLIED
+		VersionDate CDATA #IMPLIED 
+		IndexingMethod    CDATA  #IMPLIED >
+
+<!ELEMENT	PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?) >
+
+<!ELEMENT	PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | ELocationID+),
+                     Abstract?,AuthorList?, Language+, DataBankList?, GrantList?,
+                     PublicationTypeList, VernacularTitle?, ArticleDate*) >
+<!ATTLIST	Article 
+		    PubModel (Print | Print-Electronic | Electronic | Electronic-Print | Electronic-eCollection) #REQUIRED >
+		
+
+
+
+<!-- ================================================================= -->
+<!--  Everything else in alphabetical order                            -->
+<!-- ================================================================= -->
+
+<!ELEMENT	Abstract (AbstractText+, CopyrightInformation?)>
+
+<!ELEMENT	AbstractText   (%text; | mml:math | DispFormula)* >
+<!ATTLIST	AbstractText
+		    Label CDATA #IMPLIED
+		    NlmCategory (BACKGROUND | OBJECTIVE | METHODS | RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED >
+		
+<!ELEMENT	AccessionNumber (#PCDATA) >
+
+<!ELEMENT	AccessionNumberList (AccessionNumber+) >
+
+<!ELEMENT	Acronym (#PCDATA) >
+
+<!ELEMENT	Affiliation  (%text;)*>
+
+<!ELEMENT	AffiliationInfo (Affiliation, Identifier*)>
+
+<!ELEMENT	Agency (#PCDATA) >
+
+<!ELEMENT	ArticleDate (Year, Month, Day) >
+<!ATTLIST	ArticleDate 
+            DateType CDATA  #FIXED "Electronic" >
+ 
+<!ELEMENT	ArticleId (#PCDATA) >
+<!ATTLIST   ArticleId
+	        IdType (doi | pii | pmcpid | pmpid | pmc | mid |
+                   sici | pubmed | medline | pmcid | pmcbook | bookaccession) "pubmed" >
+	      
+ <!ELEMENT	ArticleIdList (ArticleId+)>
+
+<!ELEMENT	ArticleTitle   (%text; | mml:math)*>
+<!ATTLIST   ArticleTitle	%booklinkatts; >
+
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName), Identifier*, AffiliationInfo*) >
+<!ATTLIST	Author 
+            ValidYN (Y | N) "Y" 
+            EqualContrib    (Y | N)  #IMPLIED >
+            
+<!ELEMENT	AuthorList (Author+) >
+<!ATTLIST	AuthorList 
+            CompleteYN (Y | N) "Y" 
+            Type ( authors | editors )  #IMPLIED >
+
+<!ELEMENT	b		(%text;)*> <!-- bold -->
+
+<!ELEMENT	BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, InvestigatorList?, Volume?, 
+                    VolumeTitle?, Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+
+<!ELEMENT	BookTitle        (%text; | mml:math)*>
+<!ATTLIST   BookTitle	%booklinkatts; >
+
+<!ELEMENT	Chemical (RegistryNumber, NameOfSubstance) >
+
+<!ELEMENT	ChemicalList (Chemical+) >
+
+<!ELEMENT	CitationString     (%text;)*>
+
+<!ELEMENT	CitationSubset (#PCDATA) >
+
+<!ELEMENT   CoiStatement   (%text;)*>
+
+<!ELEMENT	CollectionTitle        (%text; | mml:math)*>
+<!ATTLIST   CollectionTitle	%booklinkatts; >
+
+<!ELEMENT	CollectiveName (%text;)*>
+
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?) >
+<!ATTLIST	CommentsCorrections 
+		     RefType (AssociatedDataset | AssociatedPublication | CommentOn | CommentIn | ErratumIn | 
+		             ErratumFor | ExpressionOfConcernIn | ExpressionOfConcernFor | 
+		             RepublishedFrom | RepublishedIn | 
+		             RetractionOf | RetractionIn | UpdateIn | UpdateOf | SummaryForPatientsIn | 
+		             OriginalReportIn | ReprintOf | ReprintIn | Cites)      #REQUIRED    >
+		             
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+) >
+
+<!ELEMENT	ContractNumber (#PCDATA) >
+
+<!ELEMENT	ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	CopyrightInformation (#PCDATA) >
+
+<!ELEMENT	Country (#PCDATA) >
+
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?) >
+
+<!ELEMENT	DataBankList (DataBank+) >
+
+<!ATTLIST	DataBankList 
+            CompleteYN (Y | N) "Y" >
+            
+<!ELEMENT	DataBankName (#PCDATA) >
+
+<!ELEMENT	DateCompleted (Year,Month,Day) >
+
+<!ELEMENT	DateRevised (Year,Month,Day) >
+
+<!ELEMENT	Day (#PCDATA )>
+
+<!ELEMENT	DescriptorName (#PCDATA) >
+<!ATTLIST	DescriptorName 
+		    MajorTopicYN (Y | N) "N"
+		    Type (Geographic) #IMPLIED
+		     UI CDATA #REQUIRED >
+
+<!ELEMENT       DispFormula     (mml:math) >
+<!ELEMENT	Edition (#PCDATA) >
+
+<!ELEMENT	ELocationID (#PCDATA) >
+<!ATTLIST	ELocationID 
+            EIdType (doi | pii) #REQUIRED 
+		    ValidYN  (Y | N) "Y">
+
+<!ELEMENT	EndingDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	EndPage (#PCDATA) >
+
+<!ELEMENT	ForeName (#PCDATA) >
+
+<!ELEMENT	GeneSymbol (#PCDATA) >
+
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+
+<!ELEMENT	GeneralNote (#PCDATA) >
+<!ATTLIST	GeneralNote
+		     Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM" >
+		     
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+
+<!ELEMENT	GrantID (#PCDATA) >
+
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList 
+            CompleteYN (Y | N) "Y">
+   
+<!ELEMENT	History (PubMedPubDate+) >
+
+<!ELEMENT	Hour (#PCDATA) >
+
+<!ELEMENT	i		(%text;)*> <!-- italic -->
+
+<!ELEMENT	Identifier (#PCDATA) >
+<!ATTLIST	Identifier 
+		    Source CDATA #REQUIRED >
+		    
+<!ELEMENT	Initials (#PCDATA) >
+
+<!ELEMENT	Investigator (LastName, ForeName?, Initials?, Suffix?, Identifier*, AffiliationInfo*) >
+<!ATTLIST	Investigator 
+		    ValidYN (Y | N) "Y" >
+		    
+<!ELEMENT	InvestigatorList (Investigator+) >
+
+<!ELEMENT	Isbn (#PCDATA) >
+
+<!ELEMENT	ISOAbbreviation (#PCDATA) >
+
+<!ELEMENT	ISSN (#PCDATA) >
+<!ATTLIST	ISSN 
+		    IssnType  (Electronic | Print) #REQUIRED >
+		    
+<!ELEMENT	ISSNLinking (#PCDATA) >
+
+<!ELEMENT	Issue (#PCDATA) >
+<!ELEMENT	Item (#PCDATA)>
+
+<!ELEMENT	ItemList (Item+)>
+<!ATTLIST   ItemList 
+            ListType CDATA #REQUIRED>
+
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate) >
+<!ATTLIST	JournalIssue 
+		    CitedMedium (Internet | Print) #REQUIRED >
+		    
+<!ELEMENT	Keyword     (%text; | mml:math)*>
+<!ATTLIST	Keyword 
+		    MajorTopicYN (Y | N) "N" >
+		    
+<!ELEMENT	KeywordList (Keyword+) >
+<!ATTLIST	KeywordList 
+		    Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM" >
+		    
+<!ELEMENT	Language (#PCDATA) >
+
+<!ELEMENT	LastName (#PCDATA) >
+
+<!ELEMENT	LocationLabel		(#PCDATA)>
+<!ATTLIST   LocationLabel
+			Type  (part|chapter|section|appendix|figure|table|box)  #IMPLIED >
+
+<!ELEMENT	Medium (#PCDATA) >
+
+<!ELEMENT	MedlineDate (#PCDATA) >
+
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?, ISSNLinking?) >
+
+<!ELEMENT	MedlinePgn (#PCDATA) >
+
+<!ELEMENT	MedlineTA (#PCDATA) >
+
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+
+<!ELEMENT	Minute (#PCDATA) >
+
+<!ELEMENT	Month (#PCDATA) >
+
+<!ELEMENT	NameOfSubstance (#PCDATA) >
+<!ATTLIST	NameOfSubstance 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	NlmUniqueID (#PCDATA) >
+
+<!ELEMENT	Note (#PCDATA) >
+
+<!ELEMENT	NumberOfReferences (#PCDATA) >
+
+<!ELEMENT	Object (Param*)>
+<!ATTLIST	Object 
+          Type CDATA #REQUIRED >
+  
+<!ELEMENT	ObjectList (Object+) >
+
+<!ELEMENT	OtherAbstract (AbstractText+, CopyrightInformation?) >
+
+<!ATTLIST	OtherAbstract 
+		    Type (AAMC | AIDS | KIE | PIP | NASA | Publisher) #REQUIRED
+		    Language CDATA "eng" >
+		    
+<!ELEMENT	OtherID (#PCDATA) >
+<!ATTLIST	OtherID 
+		    Source (NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML |
+		            NRCBL | NLM | QCIM) #REQUIRED >
+		            
+<!ELEMENT	PMID (#PCDATA) >
+<!ATTLIST	PMID 
+		    Version CDATA #REQUIRED >
+		    
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn) >
+
+<!ELEMENT	Param  (%text;)*>
+<!ATTLIST	Param 
+             Name CDATA #REQUIRED >
+          
+<!ELEMENT	PersonalNameSubject (LastName, ForeName?, Initials?, Suffix?) >
+
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+) >
+
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate) >
+
+<!ELEMENT	PublicationStatus (#PCDATA) >
+
+<!ELEMENT	PublicationType (#PCDATA) >
+<!ATTLIST	PublicationType 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	PublicationTypeList (PublicationType+) >
+
+<!ELEMENT   PubMedPubDate (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ATTLIST   PubMedPubDate
+    	     PubStatus (received | accepted | epublish | 
+                      ppublish | revised | aheadofprint | 
+                      retracted | ecollection | pmc | pmcr | pubmed | pubmedr | 
+                      premedline | medline | medliner | entrez | pmc-release) #REQUIRED >
+
+<!ELEMENT	Publisher (PublisherName, PublisherLocation?) >
+
+<!ELEMENT	PublisherLocation (#PCDATA) >
+
+<!ELEMENT	PublisherName     (%text;)*>
+
+<!ELEMENT	QualifierName (#PCDATA) >
+<!ATTLIST	QualifierName 
+		    MajorTopicYN (Y | N) "N"
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	RefSource (#PCDATA) >
+
+<!ELEMENT	RegistryNumber (#PCDATA) >
+
+<!ELEMENT	ReportNumber (#PCDATA) >
+
+<!ELEMENT	Season (#PCDATA) >
+
+<!ELEMENT	Second (#PCDATA) >
+
+
+<!ELEMENT	Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT	Sections	(Section+) >
+
+<!ELEMENT	SectionTitle	(%text;)*>
+<!ATTLIST   SectionTitle	%booklinkatts; >
+
+<!ELEMENT	SpaceFlightMission (#PCDATA) >
+
+<!ELEMENT	StartPage (#PCDATA) >
+
+<!ELEMENT	sub	(%text;)*> <!-- subscript -->
+
+<!ELEMENT	Suffix (%text;)*>
+
+<!ELEMENT	sup	(%text;)*> <!-- superscript -->
+
+<!ELEMENT	SupplMeshList (SupplMeshName+)>
+
+<!ELEMENT	SupplMeshName (#PCDATA) >
+<!ATTLIST	SupplMeshName 
+		    Type (Disease | Protocol | Organism) #REQUIRED
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	Title (#PCDATA) >
+
+<!ELEMENT	u		(%text;)*> <!-- underline -->                              
+
+<!ELEMENT	URL (#PCDATA) >
+<!ATTLIST	URL
+	      lang (AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                            HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                            PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                           VI|ZH) #IMPLIED
+	      Type ( FullText | Summary | fulltext | summary) #IMPLIED >
+	      
+<!ELEMENT	VernacularTitle     (%text; | mml:math)*>
+
+<!ELEMENT	Volume (#PCDATA) >
+
+<!ELEMENT	VolumeTitle (%text;)*>
+
+<!ELEMENT	Year (#PCDATA) >
+
+
+
+
+
diff --git a/dtd/pubmed_190101.dtd b/dtd/pubmed_190101.dtd
new file mode 100644
index 0000000..a1cd167
--- /dev/null
+++ b/dtd/pubmed_190101.dtd
@@ -0,0 +1,478 @@
+<!--
+
+2018-09-01
+
+This DTD supports both the E-utilities and ftp service data dissemination methods. 
+It is based on http://dtd.nlm.nih.gov/ncbi/pubmed/out/pubmed_190101.dtd
+
+Additions/Changes since 180601 DTD: 
+
+	1.  Added elements to capture reference citations:
+			<ReferenceList>
+			<Reference>
+			<Citation>
+	2.  Removed <CitationString> from book records.
+	3. Added four values to CommentsCorrections/@RefType
+	       CorrectedandRepublishedIn
+	       CorrectedandRepublishedFrom
+	       RetractedandRepublishedIn
+	       RetractedandRepublishedFrom
+	4. Added "plain-language-summary" to allowed values for @Type on 
+	    <OtherAbstract>
+
+	NOTE:  The use of "Medline" in a DTD or element name does not mean the record
+	represents a citation from a MEDLINE-selected journal.  When the NLM DTDs and
+	XML elements were first created, MEDLINE records were the only data exported.
+	Now NLM exports citations other than MEDLINE records using these tools. To
+	minimize unnecessary disruption to users of the data and tools, NLM has
+	retained the original DTD and element names (e.g., MedlineTA, MedlineJournalInfo). 
+ 
+	NOTE:  StartPage and EndPage in Pagination element are not currently used; are 
+	reserved for future use. 
+
+	* = 0 or more occurrences (optional element, repeatable)
+	? = 0 or 1 occurrences (optional element, at most 1)
+	+ = 1 or more occurrences (required element, repeatable)
+	| = choice, one or the other but not both
+	no symbol = required element
+
+       -->
+       
+<!-- ============================================================= -->
+<!--                     MATHML 3.0 SETUP                        -->
+<!-- ============================================================= -->
+<!--                    MATHML SETUP FILE                 -->
+<!ENTITY % mathml-in-pubmed     SYSTEM        "mathml-in-pubmed.mod"               >	
+%mathml-in-pubmed;
+
+
+		 
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!ENTITY % text             "#PCDATA | b | i | sup | sub | u" >
+
+ <!ENTITY % booklinkatts
+			 "book		CDATA			#IMPLIED
+			 part		CDATA			#IMPLIED
+			sec		CDATA			#IMPLIED"  >
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+
+<!--  ================= Set-level elements ============================-->
+<!ELEMENT	PubmedArticleSet ((PubmedArticle | PubmedBookArticle)+, DeleteCitation?) >
+<!ATTLIST       PubmedArticleSet
+>
+
+<!ELEMENT	BookDocumentSet (BookDocument*, DeleteDocument?) >
+<!ATTLIST       BookDocumentSet
+>
+
+<!ELEMENT	PubmedBookArticleSet (PubmedBookArticle*)>
+<!ATTLIST       PubmedBookArticleSet
+>
+
+
+<!--  ============= Document-level elements ============================-->
+<!ELEMENT	PubmedArticle (MedlineCitation, PubmedData?)>
+<!ATTLIST       PubmedArticle
+>
+
+<!ELEMENT	PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ATTLIST       PubmedBookArticle
+>
+
+<!ELEMENT	BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, InvestigatorList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, GrantList?, ItemList*, ReferenceList*) >
+
+<!ELEMENT	DeleteCitation (PMID+) >
+
+<!ELEMENT	DeleteDocument (PMID*) >
+
+
+<!--  =============== Sub-Document wrapper elements =====================-->
+<!ELEMENT	MedlineCitation (PMID, DateCompleted?, DateRevised?, Article, 
+                             MedlineJournalInfo, ChemicalList?, SupplMeshList?,CitationSubset*, 
+                             CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
+                             NumberOfReferences?, PersonalNameSubjectList?, OtherID*, OtherAbstract*, 
+                             KeywordList*, CoiStatement?, SpaceFlightMission*, InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+		Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE |  In-Data-Review | Publisher | 
+		        MEDLINE | OLDMEDLINE) #REQUIRED 
+		VersionID CDATA #IMPLIED
+		VersionDate CDATA #IMPLIED 
+		IndexingMethod    CDATA  #IMPLIED >
+
+<!ELEMENT	PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?, ReferenceList*) >
+
+<!ELEMENT	PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | ELocationID+),
+                     Abstract?,AuthorList?, Language+, DataBankList?, GrantList?,
+                     PublicationTypeList, VernacularTitle?, ArticleDate*) >
+<!ATTLIST	Article 
+		    PubModel (Print | Print-Electronic | Electronic | Electronic-Print | Electronic-eCollection) #REQUIRED >
+		
+
+
+
+<!-- ================================================================= -->
+<!--  Everything else in alphabetical order                            -->
+<!-- ================================================================= -->
+
+<!ELEMENT	Abstract (AbstractText+, CopyrightInformation?)>
+
+<!ELEMENT	AbstractText   (%text; | mml:math | DispFormula)* >
+<!ATTLIST	AbstractText
+		    Label CDATA #IMPLIED
+		    NlmCategory (BACKGROUND | OBJECTIVE | METHODS | RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED >
+		
+<!ELEMENT	AccessionNumber (#PCDATA) >
+
+<!ELEMENT	AccessionNumberList (AccessionNumber+) >
+
+<!ELEMENT	Acronym (#PCDATA) >
+
+<!ELEMENT	Affiliation  (%text;)*>
+
+<!ELEMENT	AffiliationInfo (Affiliation, Identifier*)>
+
+<!ELEMENT	Agency (#PCDATA) >
+
+<!ELEMENT	ArticleDate (Year, Month, Day) >
+<!ATTLIST	ArticleDate 
+            DateType CDATA  #FIXED "Electronic" >
+ 
+<!ELEMENT	ArticleId (#PCDATA) >
+<!ATTLIST   ArticleId
+	        IdType (doi | pii | pmcpid | pmpid | pmc | mid |
+                   sici | pubmed | medline | pmcid | pmcbook | bookaccession) "pubmed" >
+	      
+ <!ELEMENT	ArticleIdList (ArticleId+)>
+
+<!ELEMENT	ArticleTitle   (%text; | mml:math)*>
+<!ATTLIST   ArticleTitle	%booklinkatts; >
+
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName), Identifier*, AffiliationInfo*) >
+<!ATTLIST	Author 
+            ValidYN (Y | N) "Y" 
+            EqualContrib    (Y | N)  #IMPLIED >
+            
+<!ELEMENT	AuthorList (Author+) >
+<!ATTLIST	AuthorList 
+            CompleteYN (Y | N) "Y" 
+            Type ( authors | editors )  #IMPLIED >
+
+<!ELEMENT	b		(%text;)*> <!-- bold -->
+
+<!ELEMENT	BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, InvestigatorList?, Volume?, 
+                    VolumeTitle?, Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+
+<!ELEMENT	BookTitle        (%text; | mml:math)*>
+<!ATTLIST   BookTitle	%booklinkatts; >
+
+<!ELEMENT	Chemical (RegistryNumber, NameOfSubstance) >
+
+<!ELEMENT	ChemicalList (Chemical+) >
+
+<!ELEMENT	Citation       (%text; | mml:math)*>
+
+<!ELEMENT	CitationSubset (#PCDATA) >
+
+<!ELEMENT   CoiStatement   (%text;)*>
+
+<!ELEMENT	CollectionTitle        (%text; | mml:math)*>
+<!ATTLIST   CollectionTitle	%booklinkatts; >
+
+<!ELEMENT	CollectiveName (%text;)*>
+
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?) >
+<!ATTLIST	CommentsCorrections 
+		     RefType (AssociatedDataset | 
+		             AssociatedPublication | 
+		             CommentIn | CommentOn | 
+		             CorrectedandRepublishedIn | CorrectedandRepublishedFrom |
+		             ErratumIn | ErratumFor | 
+		             ExpressionOfConcernIn | ExpressionOfConcernFor | 
+		             RepublishedIn | RepublishedFrom |  
+		             RetractedandRepublishedIn | RetractedandRepublishedFrom |
+		             RetractionIn | RetractionOf |  
+		             UpdateIn | UpdateOf | 
+		             SummaryForPatientsIn | 
+		             OriginalReportIn | 
+		             ReprintIn | ReprintOf |  
+		             Cites)      #REQUIRED    >
+		             
+
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+) >
+
+<!ELEMENT	ContractNumber (#PCDATA) >
+
+<!ELEMENT	ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	CopyrightInformation (#PCDATA) >
+
+<!ELEMENT	Country (#PCDATA) >
+
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?) >
+
+<!ELEMENT	DataBankList (DataBank+) >
+
+<!ATTLIST	DataBankList 
+            CompleteYN (Y | N) "Y" >
+            
+<!ELEMENT	DataBankName (#PCDATA) >
+
+<!ELEMENT	DateCompleted (Year,Month,Day) >
+
+<!ELEMENT	DateRevised (Year,Month,Day) >
+
+<!ELEMENT	Day (#PCDATA )>
+
+<!ELEMENT	DescriptorName (#PCDATA) >
+<!ATTLIST	DescriptorName 
+		    MajorTopicYN (Y | N) "N"
+		    Type (Geographic) #IMPLIED
+		     UI CDATA #REQUIRED >
+
+<!ELEMENT       DispFormula     (mml:math) >
+<!ELEMENT	Edition (#PCDATA) >
+
+<!ELEMENT	ELocationID (#PCDATA) >
+<!ATTLIST	ELocationID 
+            EIdType (doi | pii) #REQUIRED 
+		    ValidYN  (Y | N) "Y">
+
+<!ELEMENT	EndingDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	EndPage (#PCDATA) >
+
+<!ELEMENT	ForeName (#PCDATA) >
+
+<!ELEMENT	GeneSymbol (#PCDATA) >
+
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+
+<!ELEMENT	GeneralNote (#PCDATA) >
+<!ATTLIST	GeneralNote
+		     Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM" >
+		     
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+
+<!ELEMENT	GrantID (#PCDATA) >
+
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList 
+            CompleteYN (Y | N) "Y">
+   
+<!ELEMENT	History (PubMedPubDate+) >
+
+<!ELEMENT	Hour (#PCDATA) >
+
+<!ELEMENT	i		(%text;)*> <!-- italic -->
+
+<!ELEMENT	Identifier (#PCDATA) >
+<!ATTLIST	Identifier 
+		    Source CDATA #REQUIRED >
+		    
+<!ELEMENT	Initials (#PCDATA) >
+
+<!ELEMENT	Investigator (LastName, ForeName?, Initials?, Suffix?, Identifier*, AffiliationInfo*) >
+<!ATTLIST	Investigator 
+		    ValidYN (Y | N) "Y" >
+		    
+<!ELEMENT	InvestigatorList (Investigator+) >
+
+<!ELEMENT	Isbn (#PCDATA) >
+
+<!ELEMENT	ISOAbbreviation (#PCDATA) >
+
+<!ELEMENT	ISSN (#PCDATA) >
+<!ATTLIST	ISSN 
+		    IssnType  (Electronic | Print) #REQUIRED >
+		    
+<!ELEMENT	ISSNLinking (#PCDATA) >
+
+<!ELEMENT	Issue (#PCDATA) >
+<!ELEMENT	Item (#PCDATA)>
+
+<!ELEMENT	ItemList (Item+)>
+<!ATTLIST   ItemList 
+            ListType CDATA #REQUIRED>
+
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate) >
+<!ATTLIST	JournalIssue 
+		    CitedMedium (Internet | Print) #REQUIRED >
+		    
+<!ELEMENT	Keyword     (%text; | mml:math)*>
+<!ATTLIST	Keyword 
+		    MajorTopicYN (Y | N) "N" >
+		    
+<!ELEMENT	KeywordList (Keyword+) >
+<!ATTLIST	KeywordList 
+		    Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM" >
+		    
+<!ELEMENT	Language (#PCDATA) >
+
+<!ELEMENT	LastName (#PCDATA) >
+
+<!ELEMENT	LocationLabel		(#PCDATA)>
+<!ATTLIST   LocationLabel
+			Type  (part|chapter|section|appendix|figure|table|box)  #IMPLIED >
+
+<!ELEMENT	Medium (#PCDATA) >
+
+<!ELEMENT	MedlineDate (#PCDATA) >
+
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?, ISSNLinking?) >
+
+<!ELEMENT	MedlinePgn (#PCDATA) >
+
+<!ELEMENT	MedlineTA (#PCDATA) >
+
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+
+<!ELEMENT	Minute (#PCDATA) >
+
+<!ELEMENT	Month (#PCDATA) >
+
+<!ELEMENT	NameOfSubstance (#PCDATA) >
+<!ATTLIST	NameOfSubstance 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	NlmUniqueID (#PCDATA) >
+
+<!ELEMENT	Note (#PCDATA) >
+
+<!ELEMENT	NumberOfReferences (#PCDATA) >
+
+<!ELEMENT	Object (Param*)>
+<!ATTLIST	Object 
+          Type CDATA #REQUIRED >
+  
+<!ELEMENT	ObjectList (Object+) >
+
+<!ELEMENT	OtherAbstract (AbstractText+, CopyrightInformation?) >
+
+<!ATTLIST	OtherAbstract 
+		    Type (AAMC | AIDS | KIE | PIP | NASA | Publisher | 
+		    plain-language-summary) #REQUIRED
+		    Language CDATA "eng" >
+		    
+<!ELEMENT	OtherID (#PCDATA) >
+<!ATTLIST	OtherID 
+		    Source (NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML |
+		            NRCBL | NLM | QCIM) #REQUIRED >
+		            
+<!ELEMENT	PMID (#PCDATA) >
+<!ATTLIST	PMID 
+		    Version CDATA #REQUIRED >
+		    
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn) >
+
+<!ELEMENT	Param  (%text;)*>
+<!ATTLIST	Param 
+             Name CDATA #REQUIRED >
+          
+<!ELEMENT	PersonalNameSubject (LastName, ForeName?, Initials?, Suffix?) >
+
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+) >
+
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate) >
+
+<!ELEMENT	PublicationStatus (#PCDATA) >
+
+<!ELEMENT	PublicationType (#PCDATA) >
+<!ATTLIST	PublicationType 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	PublicationTypeList (PublicationType+) >
+
+<!ELEMENT   PubMedPubDate (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ATTLIST   PubMedPubDate
+    	     PubStatus (received | accepted | epublish | 
+                      ppublish | revised | aheadofprint | 
+                      retracted | ecollection | pmc | pmcr | pubmed | pubmedr | 
+                      premedline | medline | medliner | entrez | pmc-release) #REQUIRED >
+
+<!ELEMENT	Publisher (PublisherName, PublisherLocation?) >
+
+<!ELEMENT	PublisherLocation (#PCDATA) >
+
+<!ELEMENT	PublisherName     (%text;)*>
+
+<!ELEMENT	QualifierName (#PCDATA) >
+<!ATTLIST	QualifierName 
+		    MajorTopicYN (Y | N) "N"
+		    UI CDATA #REQUIRED >
+
+<!ELEMENT	Reference (Citation, ArticleIdList?) >
+
+<!ELEMENT	ReferenceList (Title?, Reference*, ReferenceList*) >
+
+<!ELEMENT	RefSource (#PCDATA) >
+
+<!ELEMENT	RegistryNumber (#PCDATA) >
+
+<!ELEMENT	ReportNumber (#PCDATA) >
+
+<!ELEMENT	Season (#PCDATA) >
+
+<!ELEMENT	Second (#PCDATA) >
+
+
+<!ELEMENT	Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT	Sections	(Section+) >
+
+<!ELEMENT	SectionTitle	(%text;)*>
+<!ATTLIST   SectionTitle	%booklinkatts; >
+
+<!ELEMENT	SpaceFlightMission (#PCDATA) >
+
+<!ELEMENT	StartPage (#PCDATA) >
+
+<!ELEMENT	sub	(%text;)*> <!-- subscript -->
+
+<!ELEMENT	Suffix (%text;)*>
+
+<!ELEMENT	sup	(%text;)*> <!-- superscript -->
+
+<!ELEMENT	SupplMeshList (SupplMeshName+)>
+
+<!ELEMENT	SupplMeshName (#PCDATA) >
+<!ATTLIST	SupplMeshName 
+		    Type (Disease | Protocol | Organism) #REQUIRED
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	Title (#PCDATA) >
+
+<!ELEMENT	u		(%text;)*> <!-- underline -->                              
+
+<!ELEMENT	URL (#PCDATA) >
+<!ATTLIST	URL
+	      lang (AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                            HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                            PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                           VI|ZH) #IMPLIED
+	      Type ( FullText | Summary | fulltext | summary) #IMPLIED >
+	      
+<!ELEMENT	VernacularTitle     (%text; | mml:math)*>
+
+<!ELEMENT	Volume (#PCDATA) >
+
+<!ELEMENT	VolumeTitle (%text;)*>
+
+<!ELEMENT	Year (#PCDATA) >
+
+
+
+
+
diff --git a/dtd/pubmed_230101.dtd b/dtd/pubmed_230101.dtd
new file mode 100644
index 0000000..fb1354e
--- /dev/null
+++ b/dtd/pubmed_230101.dtd
@@ -0,0 +1,468 @@
+<!--
+
+2022-12-06
+
+This DTD supports both the E-utilities and ftp service data dissemination methods. 
+It is based on http://dtd.nlm.nih.gov/ncbi/pubmed/out/pubmed_230101.dtd
+
+Additions/Changes since pubmed_190101 DTD: 
+
+	1.  added values "Population" and "Anatomy" to a list of allowed values 
+	     of "Type" attribute of "SupplMeshName".
+
+	NOTE:  The use of "Medline" in a DTD or element name does not mean the record
+	represents a citation from a MEDLINE-selected journal.  When the NLM DTDs and
+	XML elements were first created, MEDLINE records were the only data exported.
+	Now NLM exports citations other than MEDLINE records using these tools. To
+	minimize unnecessary disruption to users of the data and tools, NLM has
+	retained the original DTD and element names (e.g., MedlineTA, MedlineJournalInfo). 
+ 
+	NOTE: The updated PubMed API now allows for the use of the StartPage and 
+	EndPage elements in Pagination.
+
+	* = 0 or more occurrences (optional element, repeatable)
+	? = 0 or 1 occurrences (optional element, at most 1)
+	+ = 1 or more occurrences (required element, repeatable)
+	| = choice, one or the other but not both
+	no symbol = required element
+
+       -->
+       
+<!-- ============================================================= -->
+<!--                     MATHML 3.0 SETUP                        -->
+<!-- ============================================================= -->
+<!--                    MATHML SETUP FILE                 -->
+<!ENTITY % mathml-in-pubmed     SYSTEM        "mathml-in-pubmed.mod"               >	
+%mathml-in-pubmed;
+
+
+		 
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+<!ENTITY % text             "#PCDATA | b | i | sup | sub | u" >
+
+ <!ENTITY % booklinkatts
+			 "book		CDATA			#IMPLIED
+			 part		CDATA			#IMPLIED
+			sec		CDATA			#IMPLIED"  >
+<!-- ================================================================= -->
+<!-- ================================================================= -->
+
+<!--  ================= Set-level elements ============================-->
+<!ELEMENT	PubmedArticleSet ((PubmedArticle | PubmedBookArticle)+, DeleteCitation?) >
+<!ATTLIST       PubmedArticleSet
+>
+
+<!ELEMENT	BookDocumentSet (BookDocument*, DeleteDocument?) >
+<!ATTLIST       BookDocumentSet
+>
+
+<!ELEMENT	PubmedBookArticleSet (PubmedBookArticle*)>
+<!ATTLIST       PubmedBookArticleSet
+>
+
+
+<!--  ============= Document-level elements ============================-->
+<!ELEMENT	PubmedArticle (MedlineCitation, PubmedData?)>
+<!ATTLIST       PubmedArticle
+>
+
+<!ELEMENT	PubmedBookArticle (BookDocument, PubmedBookData?)>
+<!ATTLIST       PubmedBookArticle
+>
+
+<!ELEMENT	BookDocument ( PMID, ArticleIdList, Book, LocationLabel*, ArticleTitle?, VernacularTitle?,
+	Pagination?, Language*, AuthorList*, InvestigatorList?, PublicationType*, Abstract?, Sections?, KeywordList*, 
+	ContributionDate?, DateRevised?, GrantList?, ItemList*, ReferenceList*) >
+
+<!ELEMENT	DeleteCitation (PMID+) >
+
+<!ELEMENT	DeleteDocument (PMID*) >
+
+
+<!--  =============== Sub-Document wrapper elements =====================-->
+<!ELEMENT	MedlineCitation (PMID, DateCompleted?, DateRevised?, Article, 
+                             MedlineJournalInfo, ChemicalList?, SupplMeshList?,CitationSubset*, 
+                             CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
+                             NumberOfReferences?, PersonalNameSubjectList?, OtherID*, OtherAbstract*, 
+                             KeywordList*, CoiStatement?, SpaceFlightMission*, InvestigatorList?, GeneralNote*)>
+<!ATTLIST	MedlineCitation 
+		Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
+		Status (Completed | In-Process | PubMed-not-MEDLINE |  In-Data-Review | Publisher | 
+		        MEDLINE | OLDMEDLINE) #REQUIRED 
+		VersionID CDATA #IMPLIED
+		VersionDate CDATA #IMPLIED 
+		IndexingMethod    CDATA  #IMPLIED >
+
+<!ELEMENT	PubmedData (History?, PublicationStatus, ArticleIdList, ObjectList?, ReferenceList*) >
+
+<!ELEMENT	PubmedBookData (History?, PublicationStatus, ArticleIdList, ObjectList?)>
+
+<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | ELocationID+),
+                     Abstract?,AuthorList?, Language+, DataBankList?, GrantList?,
+                     PublicationTypeList, VernacularTitle?, ArticleDate*) >
+<!ATTLIST	Article 
+		    PubModel (Print | Print-Electronic | Electronic | Electronic-Print | Electronic-eCollection) #REQUIRED >
+		
+
+
+
+<!-- ================================================================= -->
+<!--  Everything else in alphabetical order                            -->
+<!-- ================================================================= -->
+
+<!ELEMENT	Abstract (AbstractText+, CopyrightInformation?)>
+
+<!ELEMENT	AbstractText   (%text; | mml:math | DispFormula)* >
+<!ATTLIST	AbstractText
+		    Label CDATA #IMPLIED
+		    NlmCategory (BACKGROUND | OBJECTIVE | METHODS | RESULTS | CONCLUSIONS | UNASSIGNED) #IMPLIED >
+		
+<!ELEMENT	AccessionNumber (#PCDATA) >
+
+<!ELEMENT	AccessionNumberList (AccessionNumber+) >
+
+<!ELEMENT	Acronym (#PCDATA) >
+
+<!ELEMENT	Affiliation  (%text;)*>
+
+<!ELEMENT	AffiliationInfo (Affiliation, Identifier*)>
+
+<!ELEMENT	Agency (#PCDATA) >
+
+<!ELEMENT	ArticleDate (Year, Month, Day) >
+<!ATTLIST	ArticleDate 
+            DateType CDATA  #FIXED "Electronic" >
+ 
+<!ELEMENT	ArticleId (#PCDATA) >
+<!ATTLIST   ArticleId
+	        IdType (doi | pii | pmcpid | pmpid | pmc | mid |
+                   sici | pubmed | medline | pmcid | pmcbook | bookaccession) "pubmed" >
+	      
+ <!ELEMENT	ArticleIdList (ArticleId+)>
+
+<!ELEMENT	ArticleTitle   (%text; | mml:math)*>
+<!ATTLIST   ArticleTitle	%booklinkatts; >
+
+<!ELEMENT	Author (((LastName, ForeName?, Initials?, Suffix?) | CollectiveName), Identifier*, AffiliationInfo*) >
+<!ATTLIST	Author 
+            ValidYN (Y | N) "Y" 
+            EqualContrib    (Y | N)  #IMPLIED >
+            
+<!ELEMENT	AuthorList (Author+) >
+<!ATTLIST	AuthorList 
+            CompleteYN (Y | N) "Y" 
+            Type ( authors | editors )  #IMPLIED >
+
+<!ELEMENT	b		(%text;)*> <!-- bold -->
+
+<!ELEMENT	BeginningDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	Book ( Publisher, BookTitle, PubDate, BeginningDate?, EndingDate?, AuthorList*, InvestigatorList?, Volume?, 
+                    VolumeTitle?, Edition?, CollectionTitle?, Isbn*, ELocationID*, Medium?, ReportNumber?) >
+
+<!ELEMENT	BookTitle        (%text; | mml:math)*>
+<!ATTLIST   BookTitle	%booklinkatts; >
+
+<!ELEMENT	Chemical (RegistryNumber, NameOfSubstance) >
+
+<!ELEMENT	ChemicalList (Chemical+) >
+
+<!ELEMENT	Citation       (%text; | mml:math)*>
+
+<!ELEMENT	CitationSubset (#PCDATA) >
+
+<!ELEMENT   CoiStatement   (%text;)*>
+
+<!ELEMENT	CollectionTitle        (%text; | mml:math)*>
+<!ATTLIST   CollectionTitle	%booklinkatts; >
+
+<!ELEMENT	CollectiveName (%text;)*>
+
+<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?) >
+<!ATTLIST	CommentsCorrections 
+		     RefType (AssociatedDataset | 
+		             AssociatedPublication | 
+		             CommentIn | CommentOn | 
+		             CorrectedandRepublishedIn | CorrectedandRepublishedFrom |
+		             ErratumIn | ErratumFor | 
+		             ExpressionOfConcernIn | ExpressionOfConcernFor | 
+		             RepublishedIn | RepublishedFrom |  
+		             RetractedandRepublishedIn | RetractedandRepublishedFrom |
+		             RetractionIn | RetractionOf |  
+		             UpdateIn | UpdateOf | 
+		             SummaryForPatientsIn | 
+		             OriginalReportIn | 
+		             ReprintIn | ReprintOf |  
+		             Cites)      #REQUIRED    >
+		             
+
+<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+) >
+
+<!ELEMENT	ContractNumber (#PCDATA) >
+
+<!ELEMENT	ContributionDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	CopyrightInformation (#PCDATA) >
+
+<!ELEMENT	Country (#PCDATA) >
+
+<!ELEMENT	DataBank (DataBankName, AccessionNumberList?) >
+
+<!ELEMENT	DataBankList (DataBank+) >
+
+<!ATTLIST	DataBankList 
+            CompleteYN (Y | N) "Y" >
+            
+<!ELEMENT	DataBankName (#PCDATA) >
+
+<!ELEMENT	DateCompleted (Year,Month,Day) >
+
+<!ELEMENT	DateRevised (Year,Month,Day) >
+
+<!ELEMENT	Day (#PCDATA )>
+
+<!ELEMENT	DescriptorName (#PCDATA) >
+<!ATTLIST	DescriptorName 
+		    MajorTopicYN (Y | N) "N"
+		    Type (Geographic) #IMPLIED
+		     UI CDATA #REQUIRED >
+
+<!ELEMENT       DispFormula     (mml:math) >
+<!ELEMENT	Edition (#PCDATA) >
+
+<!ELEMENT	ELocationID (#PCDATA) >
+<!ATTLIST	ELocationID 
+            EIdType (doi | pii) #REQUIRED 
+		    ValidYN  (Y | N) "Y">
+
+<!ELEMENT	EndingDate ( Year, ((Month, Day?) | Season)? ) >
+
+<!ELEMENT	EndPage (#PCDATA) >
+
+<!ELEMENT	ForeName (#PCDATA) >
+
+<!ELEMENT	GeneSymbol (#PCDATA) >
+
+<!ELEMENT	GeneSymbolList (GeneSymbol+)>
+
+<!ELEMENT	GeneralNote (#PCDATA) >
+<!ATTLIST	GeneralNote
+		     Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM" >
+		     
+<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
+
+<!ELEMENT	GrantID (#PCDATA) >
+
+<!ELEMENT	GrantList (Grant+)>
+<!ATTLIST	GrantList 
+            CompleteYN (Y | N) "Y">
+   
+<!ELEMENT	History (PubMedPubDate+) >
+
+<!ELEMENT	Hour (#PCDATA) >
+
+<!ELEMENT	i		(%text;)*> <!-- italic -->
+
+<!ELEMENT	Identifier (#PCDATA) >
+<!ATTLIST	Identifier 
+		    Source CDATA #REQUIRED >
+		    
+<!ELEMENT	Initials (#PCDATA) >
+
+<!ELEMENT	Investigator (LastName, ForeName?, Initials?, Suffix?, Identifier*, AffiliationInfo*) >
+<!ATTLIST	Investigator 
+		    ValidYN (Y | N) "Y" >
+		    
+<!ELEMENT	InvestigatorList (Investigator+) >
+
+<!ELEMENT	Isbn (#PCDATA) >
+
+<!ELEMENT	ISOAbbreviation (#PCDATA) >
+
+<!ELEMENT	ISSN (#PCDATA) >
+<!ATTLIST	ISSN 
+		    IssnType  (Electronic | Print) #REQUIRED >
+		    
+<!ELEMENT	ISSNLinking (#PCDATA) >
+
+<!ELEMENT	Issue (#PCDATA) >
+<!ELEMENT	Item (#PCDATA)>
+
+<!ELEMENT	ItemList (Item+)>
+<!ATTLIST   ItemList 
+            ListType CDATA #REQUIRED>
+
+<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
+
+<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate) >
+<!ATTLIST	JournalIssue 
+		    CitedMedium (Internet | Print) #REQUIRED >
+		    
+<!ELEMENT	Keyword     (%text; | mml:math)*>
+<!ATTLIST	Keyword 
+		    MajorTopicYN (Y | N) "N" >
+		    
+<!ELEMENT	KeywordList (Keyword+) >
+<!ATTLIST	KeywordList 
+		    Owner (NLM | NLM-AUTO | NASA | PIP | KIE | NOTNLM | HHS) "NLM" >
+		    
+<!ELEMENT	Language (#PCDATA) >
+
+<!ELEMENT	LastName (#PCDATA) >
+
+<!ELEMENT	LocationLabel		(#PCDATA)>
+<!ATTLIST   LocationLabel
+			Type  (part|chapter|section|appendix|figure|table|box)  #IMPLIED >
+
+<!ELEMENT	Medium (#PCDATA) >
+
+<!ELEMENT	MedlineDate (#PCDATA) >
+
+<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?, ISSNLinking?) >
+
+<!ELEMENT	MedlinePgn (#PCDATA) >
+
+<!ELEMENT	MedlineTA (#PCDATA) >
+
+<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
+
+<!ELEMENT	MeshHeadingList (MeshHeading+)>
+
+<!ELEMENT	Minute (#PCDATA) >
+
+<!ELEMENT	Month (#PCDATA) >
+
+<!ELEMENT	NameOfSubstance (#PCDATA) >
+<!ATTLIST	NameOfSubstance 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	NlmUniqueID (#PCDATA) >
+
+<!ELEMENT	Note (#PCDATA) >
+
+<!ELEMENT	NumberOfReferences (#PCDATA) >
+
+<!ELEMENT	Object (Param*)>
+<!ATTLIST	Object 
+          Type CDATA #REQUIRED >
+  
+<!ELEMENT	ObjectList (Object+) >
+
+<!ELEMENT	OtherAbstract (AbstractText+, CopyrightInformation?) >
+
+<!ATTLIST	OtherAbstract 
+		    Type (AAMC | AIDS | KIE | PIP | NASA | Publisher | 
+		    plain-language-summary) #REQUIRED
+		    Language CDATA "eng" >
+		    
+<!ELEMENT	OtherID (#PCDATA) >
+<!ATTLIST	OtherID 
+		    Source (NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | CLML |
+		            NRCBL | NLM | QCIM) #REQUIRED >
+		            
+<!ELEMENT	PMID (#PCDATA) >
+<!ATTLIST	PMID 
+		    Version CDATA #REQUIRED >
+		    
+<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn) >
+
+<!ELEMENT	Param  (%text;)*>
+<!ATTLIST	Param 
+             Name CDATA #REQUIRED >
+          
+<!ELEMENT	PersonalNameSubject (LastName, ForeName?, Initials?, Suffix?) >
+
+<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+) >
+
+<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate) >
+
+<!ELEMENT	PublicationStatus (#PCDATA) >
+
+<!ELEMENT	PublicationType (#PCDATA) >
+<!ATTLIST	PublicationType 
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	PublicationTypeList (PublicationType+) >
+
+<!ELEMENT   PubMedPubDate (Year, Month, Day, (Hour, (Minute, Second?)?)?)>
+<!ATTLIST   PubMedPubDate
+    	     PubStatus (received | accepted | epublish | 
+                      ppublish | revised | aheadofprint | 
+                      retracted | ecollection | pmc | pmcr | pubmed | pubmedr | 
+                      premedline | medline | medliner | entrez | pmc-release) #REQUIRED >
+
+<!ELEMENT	Publisher (PublisherName, PublisherLocation?) >
+
+<!ELEMENT	PublisherLocation (#PCDATA) >
+
+<!ELEMENT	PublisherName     (%text;)*>
+
+<!ELEMENT	QualifierName (#PCDATA) >
+<!ATTLIST	QualifierName 
+		    MajorTopicYN (Y | N) "N"
+		    UI CDATA #REQUIRED >
+
+<!ELEMENT	Reference (Citation, ArticleIdList?) >
+
+<!ELEMENT	ReferenceList (Title?, Reference*, ReferenceList*) >
+
+<!ELEMENT	RefSource (#PCDATA) >
+
+<!ELEMENT	RegistryNumber (#PCDATA) >
+
+<!ELEMENT	ReportNumber (#PCDATA) >
+
+<!ELEMENT	Season (#PCDATA) >
+
+<!ELEMENT	Second (#PCDATA) >
+
+
+<!ELEMENT	Section	(LocationLabel?, SectionTitle, Section*) >
+
+<!ELEMENT	Sections	(Section+) >
+
+<!ELEMENT	SectionTitle	(%text;)*>
+<!ATTLIST   SectionTitle	%booklinkatts; >
+
+<!ELEMENT	SpaceFlightMission (#PCDATA) >
+
+<!ELEMENT	StartPage (#PCDATA) >
+
+<!ELEMENT	sub	(%text;)*> <!-- subscript -->
+
+<!ELEMENT	Suffix (%text;)*>
+
+<!ELEMENT	sup	(%text;)*> <!-- superscript -->
+
+<!ELEMENT	SupplMeshList (SupplMeshName+)>
+
+<!ELEMENT	SupplMeshName (#PCDATA) >
+<!ATTLIST	SupplMeshName 
+		    Type ( Disease | Protocol | Organism | Anatomy | Population ) #REQUIRED
+		    UI CDATA #REQUIRED >
+		    
+<!ELEMENT	Title (#PCDATA) >
+
+<!ELEMENT	u		(%text;)*> <!-- underline -->                              
+
+<!ELEMENT	URL (#PCDATA) >
+<!ATTLIST	URL
+	      lang (AF|AR|AZ|BG|CS|DA|DE|EN|EL|ES|FA|FI|FR|HE|
+                            HU|HY|IN|IS|IT|IW|JA|KA|KO|LT|MK|ML|NL|NO|
+                            PL|PT|PS|RO|RU|SL|SK|SQ|SR|SV|SW|TH|TR|UK|
+                           VI|ZH) #IMPLIED
+	      Type ( FullText | Summary | fulltext | summary) #IMPLIED >
+	      
+<!ELEMENT	VernacularTitle     (%text; | mml:math)*>
+
+<!ELEMENT	Volume (#PCDATA) >
+
+<!ELEMENT	VolumeTitle (%text;)*>
+
+<!ELEMENT	Year (#PCDATA) >
+
+
+
+
+
diff --git a/dtd/references.ent b/dtd/references.ent
new file mode 100644
index 0000000..591cb9f
--- /dev/null
+++ b/dtd/references.ent
@@ -0,0 +1,726 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Bibliographic Reference (Citation) Class Elements -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Bibliographic Reference (Citation) Class Elements v2.0 20040830//EN"
+Delivered as file "references.ent"                                 -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the bibliographic reference elements      -->
+<!--                                                               -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definition of the references class     -->
+<!--             2) Parameter Entities for attribute lists         -->
+<!--             3) Models for the bibliographic reference         -->
+<!--                class elements in alphabetical order           -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+ 12. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Added internal parentheses to Parameter Entity and removed 
+     them from Element Declaration for:
+     - %note-model;
+     - %ref-list-model;
+     - %ref-model;
+     - and removed the parentheses for <person-group>
+
+ 11. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+
+ 10. REFERENCES.CLASS - Added the following elements to the
+     %references.class;:
+      - <issue-id>
+      - <issue-title>
+      - <page-range>
+      - <role>
+      - <string-name>
+      - <volume-id>
+
+  9. EMAIL AND URI
+     a. Added to %source-elements; by changing 
+         %ext-links.class; ==> %address-link.class;
+
+  8. LOOSENING ELEMENT USAGE in Archiving DTD and Suite
+     a. Rewrote content model for access-date as a new Parameter
+        Entity %access-date-elements;
+     b. Allowed all date components (%date-part.class;)
+        inside this PE in Archiving DTD (Green) customization
+     c. The default value is the empty string in this module,
+        therefore, access date, by default, contains nothing 
+        but #PCDATA.
+
+  7. ROLE ELEMENT - Was added to the default references class 
+     %references.class;
+
+  6. PERSON GROUP - To add <string-name> as well as correct various
+     classing problems:
+
+     a. Content model was made into a Parameter Entity
+        %person-group-model;
+
+     b. The content model was changed to incorporate the new
+         -%name.class;, which adds both <string-name> and <collab>
+
+  5. NAME CLASS / STRING NAME
+     a. Created a new element <string-name> for names that
+        do not follow the former, strict personal name model.
+
+     b. Created a new class %name.class; to hold all the ways
+        to name people: <name>, <string-name>, and <collab>
+        who produce products or articles. Used in:
+        - <person-group>
+     
+     c. To allow <string-name> to be used anywhere <name> is
+        used:
+        - Added to default %references.class;
+
+  4. NEW PARAMETER ENTITIES - To correct potential classing 
+     problems, created the following new Parameter Entities:
+     a. NEW CLASSES
+        - %just-para.class; used in <annotation>, -%note-model;
+        - %ref-list.class; used in <ref-list>
+     b. NEW MIXES 
+        - <edition>       -%edition-elements;
+        - <gov>           -%gov-elements;
+        - <patent>        -%patent-elements;
+        - <series-title>  -%series-title-elements;
+        - <std>           -%std-elements;
+        - <time-stamp>    -%time-stamp-elements;
+
+
+  3. Updated public identifier to "v2.0 20040830"         
+     
+     =============================================================
+     Version 1.1                           (TRG) v1.1 (2003-11-01)
+
+  2. Added element <page-count> to parameter entity 
+     %references.class;
+     Rationale:  Permit tagging of page count where included in
+     references.
+
+     =============================================================
+     Version 1.0 Post Publishing DTD Change (DAL) v 1.0 2003-02-10
+
+  1. Removed <other-ref>, since the Publishing (authoring) DTD did
+     not need it and that is what it had been made for. It was 
+     never to be used for conversion or interchange, so it's gone.
+     Removed %other-ref-elements; as well. It did not need to be 
+     removed from any context, as it was never used.
+                                                                   -->
+                                                                   
+                                                                   
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module, 
+                        usually accomplished in the Customization
+                        Module for the specific DTD:
+                          - %emphasis.class;
+                          - %just-rendition;
+                          - %label.class;
+                          - %para-level;
+                          - %rendition-plus;
+                          - %simple-phrase;
+                          - %subsup.class;                         -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
+<!-- ============================================================= -->
+                                                                
+                                                                 
+<!--                    PERSON GROUP ATTRIBUTES                    -->
+<!--                    Attributes for the <person-group> element  -->
+<!ENTITY %  person-group-atts  
+             "person-group-type 
+                        CDATA                             #IMPLIED"  >
+                                                                
+                                                                 
+<!--                    PUBLICATION IDENTIFIER ATTRIBUTES          -->
+<!--                    Attributes for the <pub-id> element        -->
+<!ENTITY %  pub-id-atts  
+             "pub-id-type 
+                        (%pub-id-types;)                  #IMPLIED"  >
+
+
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+                                                                
+                                                                 
+<!--                    SOURCE ATTRIBUTES                          -->
+<!--                    Attributes for the <source> and 
+                        <trans-source> elements                    -->
+<!ENTITY %  source-atts
+             "xml:lang   NMTOKEN                           #IMPLIED" > 
+                                                                   
+<!-- ============================================================= -->
+<!--                    BIBLIOGRAPHIC REFERENCE LIST ELEMENTS      -->
+<!-- ============================================================= -->
+
+
+<!--ELEM   article-title       
+                        Defined in %common.ent;                    -->
+<!--ELEM   collab       Defined in %common.ent;                    -->
+<!--ELEM   conf-date    Defined in %common.ent;                    -->
+<!--ELEM   conf-loc     Defined in %common.ent;                    -->
+<!--ELEM   conf-name    Defined in %common.ent;                    -->
+<!--ELEM   day          Defined in %common.ent;                    -->
+<!--ELEM   elocation-id Defined in %common.ent;                    -->
+<!--ELEM   email        Defined in %common.ent;                    -->
+<!--ELEM   fpage        Defined in %common.ent;                    -->
+<!--ELEM   issn         Defined in %common.ent;                    -->
+<!--ELEM   issue        Defined in %common.ent;                    -->
+<!--ELEM   lpage        Defined in %common.ent;                    -->
+<!--ELEM   month        Defined in %common.ent;                    -->
+<!--ELEM   publisher-loc       
+                        Defined in %common.ent;                    -->
+<!--ELEM   publisher-name      
+                        Defined in %common.ent;                    -->
+<!--ELEM   season       Defined in %common.ent;                    -->
+<!--ELEM   title        Defined in %common.ent;                    -->
+<!--ELEM   trans-title  Defined in %common.ent;                    -->
+<!--ELEM   volume       Defined in %common.ent;                    -->
+<!--ELEM   year         Defined in %common.ent;                    -->
+
+
+<!--                    REFERENCE LIST MODEL                       -->
+<!--                    Content model for the <ref-list> element   -->
+<!ENTITY % ref-list-model
+                        "(title?, (%para-level;)*, ref*, 
+                         (%ref-list.class;)* )"                      > 
+
+
+<!--                    REFERENCE LIST (BIBLIOGRAPHIC REFERENCE LIST)
+                                                                   -->
+<!--                    List of references (citations) for the
+                        article.  Often called "References", 
+                        "Bibliography", or "Additional Reading". No
+                        distinction is made between lists of cited
+                        references and lists of suggested references.
+                        Authoring Note: The optional paragraph-level
+                        elements after the title allow for those rare
+                        cases where there is explanatory material
+                        inside the list, before the references. There
+                        may also be similar explanatory material 
+                        inside each reference group. Explanatory
+                        material preceding a citation will need to
+                        be placed inside the citation.             -->
+<!ELEMENT  ref-list     %ref-list-model;                             >
+
+
+<!--                    REFERENCE ITEM MODEL                       -->
+<!--                    Content model for the <ref> element        -->
+<!ENTITY % ref-model    "(label?, (citation | note)+ )"              > 
+
+
+<!--                    REFERENCE ITEM                             -->
+<!--                    One item in a bibliographic list, typically
+                        a citation describing a referenced work, but
+                        some journals may place notes in this list as
+                        well as citations.
+                        Conversion Note: There is usually a number or
+                        other label preceding each citation, which 
+                        the tagger may choose to preserve using the 
+                        label attribute.                           -->
+<!ELEMENT  ref          %ref-model;                                  >
+<!--         id         Unique identifier so that citation can be
+                        referenced                                 -->
+<!ATTLIST  ref
+             id         ID                                 #IMPLIED  >
+
+
+<!--ELEM   citation     Defined in %common.ent;                    -->
+
+
+<!--                    NOTE IN A REFERENCE LIST MODEL             -->
+<!ENTITY % note-model   "(label?, (%just-para.class;)+ )"            > 
+
+
+<!--                    NOTE IN A REFERENCE LIST                   -->
+<!--                    Used to tag non-citation material that 
+                        sometimes within a reference list, for 
+                        example, used to tag end note material when 
+                        such a note is placed within a reference 
+                        list.
+                        Authoring Note: For conversion use only. For
+                        creating new reference lists, notes should
+                        not be intermingled with citations.        -->
+<!ELEMENT  note         %note-model;                                 > 
+<!--         id         Unique identifier so that citation can be
+                        referenced                                 -->
+<!ATTLIST  note
+             id         ID                                 #IMPLIED  >
+
+
+<!-- ============================================================= -->
+<!--                    BIBLIOGRAPHIC REFERENCE CLASS              -->
+<!-- ============================================================= -->
+
+
+<!--                    ACCESS DATE ELEMENTS                       -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Access Date <access-date> element      -->
+<!ENTITY % access-date-elements 
+                        " "                                          >
+
+
+<!--                    ACCESS DATE FOR CITED WORK                 -->
+<!--                    The date on which the work which is cited
+                        was examined. Some online resources are 
+                        changing so quickly that a citation to the 
+                        resource is not complete without the date 
+                        on which the cited resource was examined, 
+                        since a day before or a day later the 
+                        relevant material might be different.
+                        Related Elements: The related element
+                        <time-stamp> is used to record not the time 
+                        when a cited resource was examined, but the
+                        time stamp that was found on the resource
+                        when it was examined, for time-stamped
+                        resources.                                 -->
+<!ELEMENT  access-date  (#PCDATA %access-date-elements;)*            >
+
+
+<!--                    ANNOTATION IN A CITATION                   -->
+<!--                    Most citations just provide the bibliographic
+                        information for a cited reference but a few
+                        describe or comment upon the nature or
+                        quality of the reference or summarize its
+                        findings.
+                        Display Note: All of the other reference
+                        elements are inline elements. In contrast,
+                        an Annotation may be considered a block
+                        element, with space before it and after it.-->
+<!ELEMENT  annotation   ((%just-para.class;)+)                       >
+
+
+<!--                    COMMENT ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        the Comment in a Citation <comment> element.
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ENTITY % comment-elements 
+                        "%simple-phrase;"                            >
+
+
+<!--                    COMMENT IN A CITATION                      -->
+<!--                    Used to mark unstructured text within an
+                        otherwise element structured reference.
+                        In an unstructured reference, this text would
+                        merely be data characters.
+                        Typical comments could include:
+                          <comment>[Abstract]</comment>
+                          <comment> translated from Russian</comment>
+                        DESIGN NOTE: The <comment> element is defined
+                        here largely for the sake of conversion, to
+                        preserve the semantic markup when translating
+                        from other DTDs.
+                        Authoring and Conversion Note: The Comment
+                        element should be used to mark substantive
+                        text only; it should NOT be used to markup
+                        punctuation that occurs between elements.
+                        Display Note: Comments should appear inline
+                        with other reference elements.  This is a
+                        very different rendering from that given the
+                        similar element Annotation, which is
+                        typically a longer commentary concerning a
+                        citation that is rendered as a block
+                        element.
+                        DESIGN NOTE: All inline mixes begin with an
+                        OR bar, but since %simple-phrase; is an 
+                        inline mix, the OR bar is already there.   -->
+<!ELEMENT  comment      (#PCDATA %comment-elements;)*                >
+
+
+<!--                    EDITION ELEMENTS                           -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <edition>                             
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % edition-elements
+                        "%just-rendition;"                           >
+
+<!--                    EDITION, CITED                             -->
+<!--                    The edition number of a cited publication  -->
+<!ELEMENT  edition      (#PCDATA %edition-elements;)*                >
+
+
+<!--                    GOVERNMENT REPORT ELEMENTS                 -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <gov>                             
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % gov-elements "%rendition-plus;"                           >
+
+
+<!--                    GOVERNMENT REPORT, CITED                   -->
+<!--                    The identification information (typically the
+                        title and/or an identification number) for 
+                        a cited governmental report or other 
+                        government publication                     -->
+<!ELEMENT  gov          (#PCDATA %gov-elements;)*                    >
+
+
+<!--                    ISBN                                       -->
+<!--                    International Standard Book Number         -->
+<!ELEMENT  isbn         (#PCDATA)                                    >
+
+
+<!--                    PATENT NUMBER ELEMENTS                     -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <patent>                             
+                        Design Note: -%just-rendition; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % patent-elements 
+                        "%just-rendition;"                           >
+
+
+<!--                    PATENT NUMBER, CITED                       -->
+<!--                    The identification information (typically the
+                        patent number or number and name) for a  
+                        cited patent                               -->
+<!ELEMENT  patent       (#PCDATA %patent-elements;)*                 >
+
+
+<!--                    PERSON GROUP MODEL                         -->
+<!--                    Content model for the Person Group element -->
+<!ENTITY % person-group-model
+                        "(%name.class; | aff | etal)*"               >
+
+
+<!--                    PERSON GROUP FOR A CITED PUBLICATION       -->
+<!--                    Wrapper element for one or more authors,
+                        editors, translators, etc. named in a cited
+                        reference.
+                        Remarks: Similar to the <contrib-group>
+                        element in the metadata, but could not use
+                        the same name (as this is a DTD not a schema)
+                        since the content is different.            -->
+<!ELEMENT  person-group %person-group-model;                         >
+<!--         person-group-type 
+                        Identifies the "role" of the persons being
+                        named, a group of authors, a group of 
+                        editors, members of the G&S chorus, etc.
+                        Valid Types include:
+                          author - Content creators
+                          editor - Content editors
+                          guest-editor 
+                                 - Content editor that has been 
+                                   invited to edit all or part of 
+                                   a work
+                          inventor 
+                                 - Idea, software, or machine creator
+                          assignee 
+                                 - Person to whom a patent is awarded
+                          translator
+                                 - Translated the cited work from 
+                                   one language into another
+                          trans-editor 
+                                 - Editor of a translated version of
+                                   a work
+                          all-authors
+                                 - Used to identify a complete list
+                                   of authors when a subset of the 
+                                   author group is used elsewhere 
+                                   in the citation. This may occur, 
+                                   for example, when a citation 
+                                   identifies both a book and a
+                                   chapter within the book.
+                          compiler
+                                 - Put together a composite work
+                                   from multiple sources
+                                                                   -->
+<!ATTLIST  person-group 
+             %person-group-atts;                                     >
+
+
+<!--                    PUBLICATION IDENTIFIER FOR A CITED PUBLICATION
+                                                                   -->
+<!--                    The identifier of a publication such as a
+                        related journal article that is listed 
+                        within a Citation <citation> inside the
+                        bibliographic reference list <ref-list> of 
+                        an article.                                -->
+<!ELEMENT  pub-id       (#PCDATA)                                    >
+<!--         pub-id-type 
+                        The "pub-id-type" attribute names the
+                        type of identifier, or the organization or 
+                        system that defined this identifier for the 
+                        identifier of the journal article or a 
+                        cited publication.
+                           Used on the <article-id> element, which 
+                        holds an identifier for the entire article.  
+                           Also used on the <pub-id> element, which 
+                        is an identifier for a publication cited in 
+                        a bibliographic reference (citation).
+                        Valid Types include:
+                          coden  - Obsolete PDB/CCDC identifier, may
+                                   be present on older articles
+                          doi    - Digital Object Identifier for
+                                   the publication being referenced
+                          medline- NLM Medline identifier
+                          other  - None of the named identifiers
+                          pii    - Publisher Item Identifier, see
+                                    /epub/piius.htm
+                          pmid   - PubMed ID (see
+                                   www.ncbi.nlm.nih.gov/entrez/
+                                   query.fcgi?db=PubMed)         
+                          publisher-id - 
+                                   Publisher's identifying number 
+                                   such as an 'article-id', 'artnum',
+                                   'identifier', 'article- number', 
+                                   etc.
+                          sici   - Serial Item and Contribution 
+                                   Identifier (SICI). A journal 
+                                   article may have more than one 
+                                   SICI, one for a print version and
+                                   one for an electronic version.  -->
+<!ATTLIST  pub-id  
+             %pub-id-atts;                                           >
+
+
+<!--                    SERIES ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <series>                             
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % series-elements "%rendition-plus;"                        >
+
+
+<!--                    SERIES                                     -->
+<!--                    Container element for any series information
+                        used in a citation. For example, within a
+                        citation to a non-journal item that spans
+                        multiple volumes, this element could contain
+                        the unique title of the entire series:
+                          <citation citation-type="book">
+                          <name>...</name> and <name>...</name>
+                          <year>1989</year>. <series>The Birds of
+                          South America</series>. <volume>1</volume>.
+                          <source>The Oscine Passerines</source>. 
+                          <publisher-name>University of Texas 
+                          Press</publisher-name>
+                          , <publisher-loc>Austin</publisher-loc>
+                          </citation>
+                                                                   -->
+<!ELEMENT  series       (#PCDATA %series-elements;)*                 >
+
+
+<!--                    STANDARD ELEMENTS                          -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        <std>                             
+                        Design Note: -%rendition-plus; begins with
+                        an OR bar, so this inline mix begins with
+                        an OR bar.                                 -->
+<!ENTITY % std-elements "%rendition-plus;"                           >
+
+
+<!--                    STANDARD, CITED                            -->
+<!--                    The identification information (typically the
+                        standard number, organization, and name) for 
+                        a cited standard, where "standard" is defined
+                        as a document produced by a recognized
+                        standards body such ISO, IEEE, OASIS, ANSI,
+                        etc.                                       -->
+<!ELEMENT  std          (#PCDATA %std-elements;)*                    >
+
+
+<!--                    SOURCE ELEMENTS                            -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <source>.                                -->
+<!ENTITY % source-elements
+                        "| %emphasis.class; | %address-link.class; |
+                         %subsup.class;"                             >
+
+
+<!--                    SOURCE                                     -->
+<!--                    Within a citation, this is the title of a
+                        journal, book, conference proceedings, etc.
+                        that is the source of the cited material.  -->
+<!ELEMENT  source       (#PCDATA %source-elements;)*                 >
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  source
+             %source-atts;                                           > 
+
+
+<!--                    TIME STAMP ELEMENTS                        -->
+<!--                    The elements that can be included along with
+                        data characters inside the content model of
+                        a <time-stamp>.                            -->
+<!ENTITY % time-stamp-elements
+                        " "                                          >
+
+
+<!--                    TIME STAMP FOR CITED WORK                 -->
+<!--                    Used to record any time stamp that was 
+                        found on the cited resource when it was 
+                        examined, for resources such as databases
+                        that may use a time signature to identify
+                        different versions. Note: This is not the 
+                        time when the cited resource was examined, 
+                        but rather the time it was produced,
+                        distributed, whatever milestone the resource
+                        creators chose to stamp time stamp.
+                        Related Element: <access-date> is the date 
+                        on which the cited work was examined. Some 
+                        online resources are changing so quickly 
+                        that a citation to the resource is not 
+                        complete without the date.                 -->
+<!ELEMENT  time-stamp   (#PCDATA %time-stamp-elements;)              >
+
+
+<!--                    TRANSLATED SOURCE                          -->
+<!--                    Within a citation, this is the title of a
+                        journal, book, conference proceedings, etc.
+                        that is the source of the cited material,
+                        but with the source name given in a different
+                        language from the source as given in the 
+                        <source> element. For example, if an article
+                        is originally in French, the <source> name
+                        would be the French name and the 
+                        <trans-source> might be in English.        -->
+<!ELEMENT  trans-source (#PCDATA %source-elements;)*                 >
+<!--         xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiates such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English).                   -->
+<!ATTLIST  trans-source
+             %source-atts;                                           > 
+
+
+<!-- ================== End Bibliographic Class Module =========== -->
diff --git a/dtd/section.ent b/dtd/section.ent
new file mode 100644
index 0000000..17d0128
--- /dev/null
+++ b/dtd/section.ent
@@ -0,0 +1,220 @@
+<!-- ============================================================= -->
+<!--  MODULE:    Section Class Elements                            -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite Section Class Elements v2.0 20040830//EN"
+     Delivered as file "section.ent"                               -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    Defines the member of the sec.class, that is,     -->
+<!--             names all section-level elements in the           -->
+<!--             Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!--             At the time of the initial DTD creation           -->
+<!--             there is only one such element, Section itself    -->
+<!--             <sec>, but future expansion to named sections     -->
+<!--             (such as <methodology> or <materials> or any      -->
+<!--             new section-level structures would be added here. -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Default definition of the section class        -->
+<!--             2) Defaults for attribute lists                   -->
+<!--             3) Section <sec>                                  -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+
+     =============================================================
+     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  3. COMPLETE MODELS WHEN OVER-RIDING A MODEL 
+     (for all Parameter Entities suffixed "-model")
+     ### Customization Alert ###
+     Added internal parentheses to Parameter Entity and removed 
+     them from Element Declaration for:
+     - %sec-model;
+
+  2. DEFAULT CLASSES - Were moved from this module to 
+     %default-classes.ent;
+  
+  1. Updated public identifier to "v2.0 20040830"          
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    PARAMETER ENTITY DEPENDENCIES             
+                        Requires the following parameter entities
+                        be defined before calling this module. 
+                        The content-model Parameter Entities are
+                        defined in %common.ent; but may be
+                        redefined in the Customization Module for
+                        the specific DTD:
+                          %sec-model; - Content model for section-like 
+                                        elements  
+                                                                   -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DEFAULTS FOR ATTRIBUTE LISTS               -->
+<!-- ============================================================= -->
+
+
+<!--                    SECTION ATTRIBUTES                         -->
+<!--                    Attribute list for Section element         -->
+<!ENTITY % sec-atts   
+            "id         ID                                 #IMPLIED
+             xml:lang   NMTOKEN                            #IMPLIED
+             sec-type   CDATA                              #IMPLIED 
+             disp-level CDATA                              #IMPLIED" >
+
+
+<!-- ============================================================= -->
+<!--                    SECTION ELEMENTS                           -->
+<!-- ============================================================= -->
+
+
+<!--                    SECTION                                    -->
+<!--                    A headed group of material; the basic 
+                        structural unit of the article             -->
+<!ELEMENT  sec          %sec-model;                                  >
+<!--         id         Unique identifier, so the Section can be
+                        referenced                   
+             xml:lang   The language in which the value of the
+                        element is expressed.  Recommended best 
+                        practice is to use values as defined in
+                        RFC 1766, typically 2-letter language
+                        codes such as "FR" (French), "EN" (English),
+                        and "DE" (German). These values are NOT
+                        case sensitive, so "EN" = "en". The values
+                        may include hyphenated differentiations such 
+                        as "EN-AU" (Australian English) and "EN-US"
+                        (United States English). 
+             sec-type   Conversion Note: This attribute may be used
+                        to retain information on the semantic
+                        content of a section where that is known.
+                        Authoring Note: Top-level sections (those 
+                        that are not nested inside other sections)
+                        may be assigned a "type" attribute for 
+                        indexing purposes. This attribute should be
+                        used only if the section is one of the listed
+                        types and should otherwise be omitted. A
+                        section that contains content of more than 
+                        one type should have the type IDs combined.
+                        (e.g., "Materials and Methods" would be
+                        type="materials|methods").  
+                        Types values are:         
+                          intro     Introduction/Synopsis
+                          materials Materials
+                          methods   Methods/Methodology/Procedures
+                          subjects  Patients/Participants/Subjects
+                          cases     Cases/Case Reports
+                          results   Results/Statement of Findings
+                          discussion  Discussion/Interpretation
+                          conclusions Conclusions/Comment
+             disp-level Sometimes in print or on screen, the display
+                        or apparent hierarchical level of a section
+                        is not the same as its real position in the
+                        hierarchy.  For example, in some styles,
+                        the "Clinical Finding" Section or the 
+                        'Methodology" Section always looks like a 
+                        particular level heading (say a level 2 head),
+                        wherever it falls in the hierarchy (say a 
+                        level 1 head or a level 3 head). This
+                        attribute can be used to record the needed
+                        display level. (Rare)                      -->
+<!ATTLIST  sec
+             %sec-atts;                                              >
+
+
+<!-- ================== End Section Class Module ================= -->
diff --git a/dtd/taxon.dtd b/dtd/taxon.dtd
new file mode 100644
index 0000000..fadf481
--- /dev/null
+++ b/dtd/taxon.dtd
@@ -0,0 +1,131 @@
+<!-- ?xml version="1.0"? -->
+<!-- DOCTYPE TaxaSet PUBLIC "-//NLM//DTD TaxaSet, 20 February 2004//EN" "taxon.dtd" -->
+
+<!-- $Id: taxon.dtd 348960 2012-01-05 21:51:40Z yasmax $ -->
+
+<!-- ELEMENTS -->
+<!ELEMENT TaxId       (#PCDATA)>
+<!ELEMENT ParentTaxId (#PCDATA)>
+<!ELEMENT Division    (#PCDATA)>
+<!ELEMENT Rank        (#PCDATA)>
+<!ELEMENT ClassCDE    (#PCDATA)>
+<!ELEMENT DispName    (#PCDATA)>
+<!ELEMENT UniqueName  (#PCDATA)>
+<!ELEMENT GCId        (#PCDATA)>
+<!ELEMENT GCName      (#PCDATA)>
+<!ELEMENT MGCId       (#PCDATA)>
+<!ELEMENT MGCName     (#PCDATA)>
+<!ELEMENT Lineage     (#PCDATA)>
+<!ELEMENT PropName    (#PCDATA)>
+<!ELEMENT CreateDate  (#PCDATA)>
+<!ELEMENT UpdateDate  (#PCDATA)>
+<!ELEMENT PubDate     (#PCDATA)>
+<!ELEMENT CitId       (#PCDATA)>
+<!ELEMENT CitKey      (#PCDATA)>
+<!ELEMENT CitUrl      (#PCDATA)>
+<!ELEMENT CitText     (#PCDATA)>
+<!ELEMENT CitPubmedId (#PCDATA)>
+<!ELEMENT CitMedlineId (#PCDATA)>
+<!ELEMENT ModId       (#PCDATA)>
+<!ELEMENT ModType     (#PCDATA)>
+<!ELEMENT ModName     (#PCDATA)>
+<!ELEMENT ModGBhidden (#PCDATA)>
+<!ELEMENT RModId      (#PCDATA)>
+<!ELEMENT RTaxId      (#PCDATA)>
+<!ELEMENT ScientificName (#PCDATA)>
+<!ELEMENT GenbankCommonName (#PCDATA)>
+<!ELEMENT GenbankAcronym (#PCDATA)>
+<!ELEMENT BlastName   (#PCDATA)>
+<!ELEMENT EquivalentName   (#PCDATA)>
+<!ELEMENT Synonym     (#PCDATA)>
+<!ELEMENT Acronym     (#PCDATA)>
+<!ELEMENT Misspelling (#PCDATA)>
+<!ELEMENT Anamorph    (#PCDATA)>
+<!ELEMENT Includes    (#PCDATA)>
+<!ELEMENT CommonName  (#PCDATA)>
+<!ELEMENT Inpart      (#PCDATA)>
+<!ELEMENT Misnomer    (#PCDATA)>
+<!ELEMENT Teleomorph  (#PCDATA)>
+<!ELEMENT GenbankSynonym  (#PCDATA)>
+<!ELEMENT GenbankAnamorph (#PCDATA)>
+<!ELEMENT PropValueInt (#PCDATA)>
+<!ELEMENT PropValueBool (#PCDATA)>
+<!ELEMENT PropValueString (#PCDATA)>
+
+<!-- Taxon structural entities -->
+<!ELEMENT TaxaSet ( Taxon* )>
+
+<!ELEMENT Taxon (
+                 TaxId,
+                 ScientificName,
+                 OtherNames?, 
+                 ParentTaxId?,
+                 Rank?, 
+                 Division?,
+                 GeneticCode?,
+                 MitoGeneticCode?,
+                 Lineage?,
+                 LineageEx?,
+                 Citations?,
+                 Modifiers?,
+                 Properties?,
+                 CreateDate?,
+                 UpdateDate?,
+                 PubDate?,
+                 AkaTaxIds?
+                )>
+
+
+<!ELEMENT OtherNames	( GenbankCommonName?,
+                          GenbankAcronym?,
+                          BlastName?,
+                          ( EquivalentName |
+                            Synonym        |
+                            Acronym        |
+                            Misspelling    |
+                            Anamorph       |
+                            Includes       |
+                            CommonName     |
+                            Inpart         |
+                            Misnomer       |
+                            Teleomorph     |
+                            GenbankSynonym |
+                            GenbankAnamorph
+                          )*,
+                          Name*
+                        )>
+
+<!ELEMENT Name ( ClassCDE, DispName, UniqueName? )>
+
+<!ELEMENT GeneticCode ( GCId, GCName )>
+
+<!ELEMENT MitoGeneticCode ( MGCId, MGCName )>
+
+<!ELEMENT Citations ( Citation+ )>
+
+<!ELEMENT Citation ( CitId,
+                     CitKey,
+                     CitUrl?,
+                     CitText?,
+                     CitPubmedId?,
+                     CitMedlineId?
+                   )>
+
+<!ELEMENT Modifiers ( Modifier+ )>
+
+<!ELEMENT Modifier ( ModId,
+                     ModType,
+                     ModName,
+                     ModGBhidden,
+                     ( RModId | RTaxId )?
+                   )>
+
+<!ELEMENT Properties ( Property+ )>
+
+<!ELEMENT Property ( PropName, ( PropValueInt |
+                                 PropValueBool |
+                                 PropValueString ) )>
+
+<!ELEMENT AkaTaxIds ( TaxId* )>
+
+<!ELEMENT LineageEx ( Taxon* )>
diff --git a/dtd/xhtml-inlstyle-1.mod b/dtd/xhtml-inlstyle-1.mod
new file mode 100644
index 0000000..79accd4
--- /dev/null
+++ b/dtd/xhtml-inlstyle-1.mod
@@ -0,0 +1,34 @@
+<!-- ...................................................................... -->
+<!-- XHTML Inline Style Module  ........................................... -->
+<!-- file: xhtml-inlstyle-1.mod
+
+     This is XHTML, a reformulation of HTML as a modular XML application.
+     Copyright 1998-2005 W3C (MIT, ERCIM, Keio), All Rights Reserved.
+     Revision: $Id: xhtml-inlstyle-1.mod,v 4.0 2001/04/02 22:42:49 altheim Exp $
+
+     This DTD module is identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//ENTITIES XHTML Inline Style 1.0//EN"
+       SYSTEM "http://www.w3.org/MarkUp/DTD/xhtml-inlstyle-1.mod"
+
+     Revisions:
+     (none)
+     ....................................................................... -->
+
+<!-- Inline Style
+
+     This module declares the 'style' attribute, used to support inline
+     style markup. This module must be instantiated prior to the XHTML
+     Common Attributes module in order to be included in %Core.attrib;.
+-->
+
+<!ENTITY % style.attrib
+     "style        CDATA                    #IMPLIED"
+>
+
+
+<!ENTITY % Core.extra.attrib
+     "%style.attrib;"
+>
+
+<!-- end of xhtml-inlstyle-1.mod -->
\ No newline at end of file
diff --git a/dtd/xhtml-table-1.mod b/dtd/xhtml-table-1.mod
new file mode 100644
index 0000000..2b8eeef
--- /dev/null
+++ b/dtd/xhtml-table-1.mod
@@ -0,0 +1,333 @@
+<!-- ...................................................................... -->
+<!-- XHTML Table Module  .................................................. -->
+<!-- file: xhtml-table-1.mod
+
+     This is XHTML, a reformulation of HTML as a modular XML application.
+     Copyright 1998-2005 W3C (MIT, ERCIM, Keio), All Rights Reserved.
+     Revision: $Id: xhtml-table-1.mod,v 4.1 2001/04/10 09:42:30 altheim Exp $ SMI
+
+     This DTD module is identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//ELEMENTS XHTML Tables 1.0//EN"
+       SYSTEM "http://www.w3.org/MarkUp/DTD/xhtml-table-1.mod"
+
+     Revisions:
+     (none)
+     ....................................................................... -->
+
+<!-- Tables
+
+        table, caption, thead, tfoot, tbody, colgroup, col, tr, th, td
+
+     This module declares element types and attributes used to provide
+     table markup similar to HTML 4, including features that enable
+     better accessibility for non-visual user agents.
+-->
+
+<!-- declare qualified element type names:
+-->
+<!ENTITY % table.qname  "table" >
+<!ENTITY % caption.qname  "caption" >
+<!ENTITY % thead.qname  "thead" >
+<!ENTITY % tfoot.qname  "tfoot" >
+<!ENTITY % tbody.qname  "tbody" >
+<!ENTITY % colgroup.qname  "colgroup" >
+<!ENTITY % col.qname  "col" >
+<!ENTITY % tr.qname  "tr" >
+<!ENTITY % th.qname  "th" >
+<!ENTITY % td.qname  "td" >
+
+<!-- The frame attribute specifies which parts of the frame around
+     the table should be rendered. The values are not the same as
+     CALS to avoid a name clash with the valign attribute.
+-->
+<!ENTITY % frame.attrib
+     "frame        ( void
+                   | above
+                   | below
+                   | hsides
+                   | lhs
+                   | rhs
+                   | vsides
+                   | box
+                   | border )               #IMPLIED"
+>
+
+<!-- The rules attribute defines which rules to draw between cells:
+
+     If rules is absent then assume:
+
+       "none" if border is absent or border="0" otherwise "all"
+-->
+<!ENTITY % rules.attrib
+     "rules        ( none
+                   | groups
+                   | rows
+                   | cols
+                   | all )                  #IMPLIED"
+>
+
+<!-- horizontal alignment attributes for cell contents
+-->
+<!ENTITY % CellHAlign.attrib
+     "align        ( left
+                   | center
+                   | right
+                   | justify
+                   | char )                 #IMPLIED
+      char         %Character.datatype;     #IMPLIED
+      charoff      %Length.datatype;        #IMPLIED"
+>
+
+<!-- vertical alignment attribute for cell contents
+-->
+<!ENTITY % CellVAlign.attrib
+     "valign       ( top
+                   | middle
+                   | bottom
+                   | baseline )             #IMPLIED"
+>
+
+<!-- scope is simpler than axes attribute for common tables
+-->
+<!ENTITY % scope.attrib
+     "scope        ( row
+                   | col
+                   | rowgroup
+                   | colgroup )             #IMPLIED"
+>
+
+<!-- table: Table Element .............................. -->
+
+<!ENTITY % table.element  "INCLUDE" >
+<![%table.element;[
+<!ENTITY % table.content
+     "( %caption.qname;?, ( %col.qname;* | %colgroup.qname;* ),
+      (( %thead.qname;?, %tfoot.qname;?, %tbody.qname;+ ) | ( %tr.qname;+ )))"
+>
+<!ELEMENT %table.qname;  %table.content; >
+<!-- end of table.element -->]]>
+
+<!ENTITY % table.attlist  "INCLUDE" >
+<![%table.attlist;[
+<!ATTLIST %table.qname;
+      %Common.attrib;
+      summary      %Text.datatype;          #IMPLIED
+      width        %Length.datatype;        #IMPLIED
+      border       %Pixels.datatype;        #IMPLIED
+      %frame.attrib;
+      %rules.attrib;
+      cellspacing  %Length.datatype;        #IMPLIED
+      cellpadding  %Length.datatype;        #IMPLIED
+>
+<!-- end of table.attlist -->]]>
+
+<!-- caption: Table Caption ............................ -->
+
+<!ENTITY % caption.element  "INCLUDE" >
+<![%caption.element;[
+<!ENTITY % caption.content
+     "( #PCDATA | %Inline.mix; )*"
+>
+<!ELEMENT %caption.qname;  %caption.content; >
+<!-- end of caption.element -->]]>
+
+<!ENTITY % caption.attlist  "INCLUDE" >
+<![%caption.attlist;[
+<!ATTLIST %caption.qname;
+      %Common.attrib;
+>
+<!-- end of caption.attlist -->]]>
+
+<!-- thead: Table Header ............................... -->
+
+<!-- Use thead to duplicate headers when breaking table
+     across page boundaries, or for static headers when
+     tbody sections are rendered in scrolling panel.
+-->
+
+<!ENTITY % thead.element  "INCLUDE" >
+<![%thead.element;[
+<!ENTITY % thead.content  "( %tr.qname; )+" >
+<!ELEMENT %thead.qname;  %thead.content; >
+<!-- end of thead.element -->]]>
+
+<!ENTITY % thead.attlist  "INCLUDE" >
+<![%thead.attlist;[
+<!ATTLIST %thead.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of thead.attlist -->]]>
+
+<!-- tfoot: Table Footer ............................... -->
+
+<!-- Use tfoot to duplicate footers when breaking table
+     across page boundaries, or for static footers when
+     tbody sections are rendered in scrolling panel.
+-->
+
+<!ENTITY % tfoot.element  "INCLUDE" >
+<![%tfoot.element;[
+<!ENTITY % tfoot.content  "( %tr.qname; )+" >
+<!ELEMENT %tfoot.qname;  %tfoot.content; >
+<!-- end of tfoot.element -->]]>
+
+<!ENTITY % tfoot.attlist  "INCLUDE" >
+<![%tfoot.attlist;[
+<!ATTLIST %tfoot.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of tfoot.attlist -->]]>
+
+<!-- tbody: Table Body ................................. -->
+
+<!-- Use multiple tbody sections when rules are needed
+     between groups of table rows.
+-->
+
+<!ENTITY % tbody.element  "INCLUDE" >
+<![%tbody.element;[
+<!ENTITY % tbody.content  "( %tr.qname; )+" >
+<!ELEMENT %tbody.qname;  %tbody.content; >
+<!-- end of tbody.element -->]]>
+
+<!ENTITY % tbody.attlist  "INCLUDE" >
+<![%tbody.attlist;[
+<!ATTLIST %tbody.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of tbody.attlist -->]]>
+
+<!-- colgroup: Table Column Group ...................... -->
+
+<!-- colgroup groups a set of col elements. It allows you
+     to group several semantically-related columns together.
+-->
+
+<!ENTITY % colgroup.element  "INCLUDE" >
+<![%colgroup.element;[
+<!ENTITY % colgroup.content  "( %col.qname; )*" >
+<!ELEMENT %colgroup.qname;  %colgroup.content; >
+<!-- end of colgroup.element -->]]>
+
+<!ENTITY % colgroup.attlist  "INCLUDE" >
+<![%colgroup.attlist;[
+<!ATTLIST %colgroup.qname;
+      %Common.attrib;
+      span         %Number.datatype;        '1'
+      width        %MultiLength.datatype;   #IMPLIED
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of colgroup.attlist -->]]>
+
+<!-- col: Table Column ................................. -->
+
+<!-- col elements define the alignment properties for
+     cells in one or more columns.
+
+     The width attribute specifies the width of the
+     columns, e.g.
+
+       width="64"        width in screen pixels
+       width="0.5*"      relative width of 0.5
+
+     The span attribute causes the attributes of one
+     col element to apply to more than one column.
+-->
+
+<!ENTITY % col.element  "INCLUDE" >
+<![%col.element;[
+<!ENTITY % col.content  "EMPTY" >
+<!ELEMENT %col.qname;  %col.content; >
+<!-- end of col.element -->]]>
+
+<!ENTITY % col.attlist  "INCLUDE" >
+<![%col.attlist;[
+<!ATTLIST %col.qname;
+      %Common.attrib;
+      span         %Number.datatype;        '1'
+      width        %MultiLength.datatype;   #IMPLIED
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of col.attlist -->]]>
+
+<!-- tr: Table Row ..................................... -->
+
+<!ENTITY % tr.element  "INCLUDE" >
+<![%tr.element;[
+<!ENTITY % tr.content  "( %th.qname; | %td.qname; )+" >
+<!ELEMENT %tr.qname;  %tr.content; >
+<!-- end of tr.element -->]]>
+
+<!ENTITY % tr.attlist  "INCLUDE" >
+<![%tr.attlist;[
+<!ATTLIST %tr.qname;
+      %Common.attrib;
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of tr.attlist -->]]>
+
+<!-- th: Table Header Cell ............................. -->
+
+<!-- th is for header cells, td for data,
+     but for cells acting as both use td
+-->
+
+<!ENTITY % th.element  "INCLUDE" >
+<![%th.element;[
+<!ENTITY % th.content
+     "( #PCDATA | %Flow.mix; )*"
+>
+<!ELEMENT %th.qname;  %th.content; >
+<!-- end of th.element -->]]>
+
+<!ENTITY % th.attlist  "INCLUDE" >
+<![%th.attlist;[
+<!ATTLIST %th.qname;
+      %Common.attrib;
+      abbr         %Text.datatype;          #IMPLIED
+      axis         CDATA                    #IMPLIED
+      headers      IDREFS                   #IMPLIED
+      %scope.attrib;
+      rowspan      %Number.datatype;        '1'
+      colspan      %Number.datatype;        '1'
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of th.attlist -->]]>
+
+<!-- td: Table Data Cell ............................... -->
+
+<!ENTITY % td.element  "INCLUDE" >
+<![%td.element;[
+<!ENTITY % td.content
+     "( #PCDATA | %Flow.mix; )*"
+>
+<!ELEMENT %td.qname;  %td.content; >
+<!-- end of td.element -->]]>
+
+<!ENTITY % td.attlist  "INCLUDE" >
+<![%td.attlist;[
+<!ATTLIST %td.qname;
+      %Common.attrib;
+      abbr         %Text.datatype;          #IMPLIED
+      axis         CDATA                    #IMPLIED
+      headers      IDREFS                   #IMPLIED
+      %scope.attrib;
+      rowspan      %Number.datatype;        '1'
+      colspan      %Number.datatype;        '1'
+      %CellHAlign.attrib;
+      %CellVAlign.attrib;
+>
+<!-- end of td.attlist -->]]>
+
+<!-- end of xhtml-table-1.mod -->
\ No newline at end of file
diff --git a/dtd/xmlspecchars.ent b/dtd/xmlspecchars.ent
new file mode 100644
index 0000000..bb15ade
--- /dev/null
+++ b/dtd/xmlspecchars.ent
@@ -0,0 +1,290 @@
+<!-- ============================================================= -->
+<!--  MODULE:    XML Special Characters Module                     -->
+<!--  VERSION:   2.0                                               -->
+<!--  DATE:      August 2004                                       -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
+<!--                        TYPICAL INVOCATION                     -->
+<!--
+"-//NLM//DTD Archiving and Interchange DTD Suite XML Special Characters Module v2.0 20040830//EN"
+     Delivered as file "xmlspecchars.ent"                          -->
+<!-- ============================================================= -->
+
+<!-- ============================================================= -->
+<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
+<!--                                                               -->
+<!-- PURPOSE:    External Parameter Entities for calling in the    -->
+<!--             special character entities                        -->
+<!--                                                               -->
+<!-- CONTAINS:   1) Calls to external entity sets                  -->
+<!--                                                               -->
+<!-- MODULES REQUIRED:                                             -->
+<!--             The standard ISO special character entity sets    -->
+<!--             (see below)                                       -->
+<!--                                                               -->
+<!-- CREATED FOR:                                                  -->
+<!--             Digital archives and publishers who wish to       -->
+<!--             create a custom XML DTD for original markup of    -->
+<!--             journal literature, books, and related material,  -->
+<!--             or for archiving and transferring such material   -->
+<!--             between archives.                                 -->
+<!--                                                               -->
+<!--             This DTD is in the public domain. An organization -->
+<!--             that wishes to create its own DTD from the suite  -->
+<!--             may do so without permission from NLM.            -->
+<!--                                                               -->
+<!--             The suite has been set up to be extended using a  -->
+<!--             new DTD file and a new DTD-specific customization -->
+<!--             module to redefine the many Parameter Entities.   -->
+<!--             Do not modify the suite directly or redistribute  -->
+<!--             modified versions of the suite.                   -->
+<!--                                                               -->
+<!--             In the interest of maintaining consistency and    -->
+<!--             clarity for potential users, NLM requests:        -->
+<!--                                                               -->
+<!--             1. If you create a DTD from the Archiving and     -->
+<!--                Interchange DTD Suite and intend to stay       -->
+<!--                compatible with the suite, then please include -->
+<!--                the following statement as a comment in all of -->
+<!--                your DTD modules:                              -->
+<!--                   "Created from, and fully compatible with,   -->
+<!--                    the Archiving and Interchange DTD Suite."  -->
+<!--                                                               -->
+<!--             2. If you alter one or more modules of the suite, -->
+<!--                then please rename your version and all its    -->
+<!--                modules to avoid any confusion with the        -->
+<!--                original suite. Also, please include the       -->
+<!--                following statement as a comment in all your   -->
+<!--                DTD modules:                                   -->
+<!--                   "Based in part on, but not fully compatible -->
+<!--                    with, the Archiving and Interchange DTD    --> 
+<!--                    Suite."                                    -->
+<!--                                                               -->
+<!--             Suggestions for refinements and enhancements to   -->
+<!--             the DTD suite should be sent in email to:         -->
+<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
+<!--                                                               -->
+<!-- ORIGINAL CREATION DATE:                                       -->
+<!--             December 2002                                     -->
+<!--                                                               -->
+<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
+<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
+<!--             Bruce Rosenblum (Inera Inc.)                      -->
+<!--                                                               -->
+<!--             NLM thanks the Harvard University Libraries, both -->
+<!--             for proposing that a draft archiving NLM DTD for  --> 
+<!--             life sciences journals be extended to accommodate -->
+<!--             journals in all disciplines and for sponsoring    -->
+<!--             Bruce Rosenblum's collaboration with other DTD    -->
+<!--             authors in completing Version 1.0. The Andrew W.  --> 
+<!--             Mellon Foundation provided support for these      --> 
+<!--             important contributions.                          -->
+<!--                                                               -->
+<!-- ============================================================= -->
+
+
+<!-- ============================================================= -->
+<!--                    DTD VERSION/CHANGE HISTORY                 -->
+<!-- ============================================================= -->
+<!--
+     =============================================================
+
+Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)
+     
+     Major requirement changes led to the new release, producing
+     DTD version "2.0":
+       a) The splitting of the Archival and Interchange Tag Set 
+          DTDs into three DTDs from two: an authoring DTD, an
+          archive regularization and interchange DTD (the
+          current Blue Publishing DTD), and a preservationist 
+          archive DTD (the current Green Archiving and Interchange 
+          DTD).
+       b) AIT Working Group suggestions from the June 04 meeting 
+          and June/July 2004 followup discussions
+       c) Suite remodularization to meet new (and newly articulated)
+          modularization requirements
+       d) New or renamed classes and mixes to make modifications
+          easier and more consistent
+
+  1. Updated public identifier to "v2.0 20040830"          
+                                                                   -->
+
+
+<!-- ============================================================= -->
+<!--                    ISO STANDARD SPECIAL CHARACTER SETS DEFINED-->
+<!-- ============================================================= -->
+
+
+<!--                    ISO STANDARD ADDED LATIN 1                 -->
+<!ENTITY % ISOlat1 PUBLIC
+"-//W3C//ENTITIES Added Latin 1 for MathML 2.0//EN" 
+"xmlchars/isolat1.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED LATIN 2                 -->
+<!ENTITY % ISOlat2 PUBLIC
+"-//W3C//ENTITIES Added Latin 2 for MathML 2.0//EN" 
+"xmlchars/isolat2.ent"                                               >
+
+
+<!--                    ISO BOX AND LINE DRAWING                   -->
+<!ENTITY % ISObox       PUBLIC 
+"-//W3C//ENTITIES Box and Line Drawing for MathML 2.0//EN"
+"xmlchars/isobox.ent"                                               >
+
+
+<!--                    ISO STANDARD DIACRITICAL MARKS             -->
+<!ENTITY % ISOdia PUBLIC
+"-//W3C//ENTITIES Diacritical Marks for MathML 2.0//EN" 
+"xmlchars/isodia.ent"                                                >
+
+
+<!--                    ISO STANDARD NUMERIC AND SPECIAL GRAPHIC   -->
+<!ENTITY % ISOnum PUBLIC
+"-//W3C//ENTITIES Numeric and Special Graphic for MathML 2.0//EN" 
+"xmlchars/isonum.ent"                                                >
+
+
+<!--                    ISO STANDARD PUBLISHING                    -->
+<!ENTITY % ISOpub PUBLIC
+"-//W3C//ENTITIES Publishing for MathML 2.0//EN" 
+"xmlchars/isopub.ent"                                                >
+
+
+<!--                    ISO STANDARD GENERAL TECHNICAL             -->
+<!ENTITY % ISOtech PUBLIC
+"-//W3C//ENTITIES General Technical for MathML 2.0//EN" 
+"xmlchars/isotech.ent"                                               >
+
+
+<!--                    ISO STANDARD GREEK LETTERS                 -->
+<!ENTITY % ISOgrk1 PUBLIC
+"-//W3C//ENTITIES Greek Letters//EN"
+"xmlchars/isogrk1.ent"                                               >
+
+
+<!--                    ISO STANDARD MONOTONIKO GREEK              -->
+<!ENTITY % ISOgrk2 PUBLIC
+"-//W3C//ENTITIES Monotoniko Greek//EN"
+"xmlchars/isogrk2.ent"                                               >
+
+
+<!--                    ISO STANDARD GREEK SYMBOLS                 -->
+<!ENTITY % ISOgrk3 PUBLIC
+"-//W3C//ENTITIES Greek Symbols for MathML 2.0//EN"
+"xmlchars/isogrk3.ent"                                               >
+
+
+<!--                    ISO STANDARD ALTERNATIVE GREEK SYMBOLS     -->
+<!ENTITY % ISOgrk4 PUBLIC
+"-//W3C//ENTITIES Alternative Greek Symbols//EN"
+"xmlchars/isogrk4.ent"                                               >
+
+
+<!--                    ISO STANDARD RUSSIAN CYRILLIC              -->
+<!ENTITY % ISOcyr1 PUBLIC 
+"-//W3C//ENTITIES Russian Cyrillic for MathML 2.0//EN" 
+"xmlchars/isocyr1.ent"                                               >
+
+
+<!--                    ISO STANDARD NON-RUSSIAN CYRILLIC          -->
+<!ENTITY % ISOcyr2 PUBLIC
+"-//W3C//ENTITIES Non-Russian Cyrillic for MathML 2.0//EN" 
+"xmlchars/isocyr2.ent"                                               >
+
+
+<!--                    ISO STANDARD MATH ALPHABETS (SCRIPT)       -->
+<!ENTITY % ISOmscr PUBLIC
+"-//W3C//ENTITIES Math Alphabets: Script for MathML 2.0//EN" 
+"xmlchars/isomscr.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS 
+                           (ARROW RELATIONS)                       -->
+<!ENTITY % ISOamsa PUBLIC
+"-//W3C//ENTITIES Added Math Symbols: Arrow Relations for MathML 2.0//EN" 
+"xmlchars/isoamsa.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS 
+                           (BINARY OPERATORS)                      -->
+<!ENTITY % ISOamsb PUBLIC 
+"-//W3C//ENTITIES Added Math Symbols: Binary Operators for MathML 2.0//EN" 
+"xmlchars/isoamsb.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS 
+                           (DELIMITERS)                            -->
+<!ENTITY % ISOamsc PUBLIC 
+"-//W3C//ENTITIES Added Math Symbols: Delimiters for MathML 2.0//EN" 
+"xmlchars/isoamsc.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS 
+                           (NEGATED RELATIONS)                     -->
+<!ENTITY % ISOamsn PUBLIC 
+"-//W3C//ENTITIES Added Math Symbols: Negated Relations for MathML 2.0//EN"
+"xmlchars/isoamsn.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS (ORDINARY) -->
+<!ENTITY % ISOamso PUBLIC 
+"-//W3C//ENTITIES Added Math Symbols: Ordinary for MathML 2.0//EN" 
+"xmlchars/isoamso.ent"                                               >
+
+
+<!--                    ISO STANDARD ADDED MATH SYMBOLS 
+                           (RELATIONS)                             -->
+<!ENTITY % ISOamsr PUBLIC 
+"-//W3C//ENTITIES Added Math Symbols: Relations for MathML 2.0//EN" 
+"xmlchars/isoamsr.ent"                                               >
+
+
+<!--                    ISO STANDARD MATH ALPHABETS (FRAKTUR)      -->
+<!ENTITY % ISOmfrk PUBLIC
+"-//W3C//ENTITIES Math Alphabets: Fraktur for MathML 2.0//EN" 
+"xmlchars/isomfrk.ent"                                               >
+
+
+<!--                    ISO STANDARD MATH ALPHABETS (OPEN FACE)    -->
+<!ENTITY % ISOmopf PUBLIC
+"-//W3C//ENTITIES Math Alphabets: Open Face for MathML 2.0//EN" 
+"xmlchars/isomopf.ent"                                               >
+
+
+<!-- ============================================================= -->
+<!--                    ISO SPECIAL CHARACTER SETS INVOKED         -->
+<!-- ============================================================= -->
+
+
+%ISOlat1;
+%ISOlat2;
+%ISObox;
+%ISOdia;
+%ISOnum;
+%ISOpub;
+%ISOtech;
+%ISOgrk1;
+%ISOgrk2;
+%ISOgrk3;
+%ISOgrk4;
+%ISOcyr1;
+%ISOcyr2;
+%ISOamsa;
+%ISOamsb;
+%ISOamsc;
+%ISOamsn;
+%ISOamso;
+%ISOamsr;
+%ISOmscr;
+%ISOmfrk; 
+%ISOmopf;
+
+
+<!--                    Custom special characters are declared 
+                        in a separate module %chars.ent;           -->
+
+
+<!-- ============ End of XML Special Characters Module =========== -->
diff --git a/src/main/java/com/curehunter/transform/TransformAll.java b/src/main/java/com/curehunter/transform/TransformAll.java
index 71e996a..6898ae4 100644
--- a/src/main/java/com/curehunter/transform/TransformAll.java
+++ b/src/main/java/com/curehunter/transform/TransformAll.java
@@ -8,19 +8,25 @@
 import java.util.concurrent.TimeUnit;
 import java.util.zip.GZIPInputStream;
 
+import javax.xml.parsers.SAXParser;
 import javax.xml.parsers.SAXParserFactory;
 import javax.xml.transform.Transformer;
 import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.sax.SAXSource;
 import javax.xml.transform.stream.StreamResult;
 import javax.xml.transform.stream.StreamSource;
 
 import com.curehunter.utils.FileIterator;
+import com.curehunter.utils.LocalCacheEntityResolver;
 
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.concurrent.Callable;
 
 import org.apache.commons.io.filefilter.WildcardFileFilter;
+import org.xml.sax.InputSource;
+import org.xml.sax.XMLReader;
+
 import picocli.CommandLine.Command;
 import picocli.CommandLine.Option;
 
@@ -42,6 +48,9 @@ public class TransformAll implements Callable<Integer> {
     @Option(names = { "-x", "--xsl" }, description = "XSL file to use for transformation, default: ./xsl/medlineCitationTSV.xsl")
     private Path xslFile = Paths.get(System.getProperty("user.dir")+"/xsl/medlineCitationTSV.xsl");
 
+    @Option(names = { "-d", "--dtd" }, description = "local copies of DTDs referenced in XML to avoid remote lookup, default: ./dtd")
+    private Path dtdDir = Paths.get(System.getProperty("user.dir")+"/dtd");
+
     @Option(names = { "-e", "--outExt" }, description = "extension to append to output files, default: .out", defaultValue = ".out")
     private String outputExtension;
 
@@ -56,10 +65,14 @@ public Integer call() {
         try {
             System.out.println("in=" + inputDir.toFile().getCanonicalPath() + " out="
                     + outputDir.toFile().getCanonicalPath()
-                    + " xsl=" + xslFile.toFile().getCanonicalPath());
+                    + " xsl=" + xslFile.toFile().getCanonicalPath()
+                    + " dtd=" + dtdDir.toFile().getCanonicalPath()
+                    + " workers=" + workerThreads
+                    + " filter=" + filterPattern
+                    + " outputExtension=" + outputExtension);
             ExecutorService exec = Executors.newFixedThreadPool(workerThreads);
             for (int n = 0; n < workerThreads; n++) {
-                exec.execute(new Worker(workerData, xslFile.toFile(), outputDir.toFile(), 
+                exec.execute(new Worker(workerData, xslFile.toFile(), dtdDir.toFile(), outputDir.toFile(), 
                         outputExtension, filter));
             }
             exec.shutdown();
@@ -78,14 +91,16 @@ public Integer call() {
     static class Worker implements Runnable {
         FileIterator workerData;
         File xslt;
+        File dtdDir;
         File outputDir;
         String outputExtension;
         WildcardFileFilter filter;
 
-        public Worker(FileIterator workerData, File xslt, File outputDir, String outputExtension,
+        public Worker(FileIterator workerData, File xslt, File dtdDir, File outputDir, String outputExtension,
                 WildcardFileFilter filter) {
             this.workerData = workerData;
             this.xslt = xslt;
+            this.dtdDir = dtdDir;
             this.outputDir = outputDir;
             this.outputExtension = outputExtension;
             this.filter = filter;
@@ -96,16 +111,20 @@ public void run() {
             TransformerFactory transformerFactory = TransformerFactory.newInstance();
             System.out.println("transformerFactory=" + transformerFactory + " parserFactory=" + parserFactory);
             try {
+                SAXParser saxParser = parserFactory.newSAXParser();
+                XMLReader xmlReader = saxParser.getXMLReader();
+                xmlReader.setEntityResolver(new LocalCacheEntityResolver(dtdDir));
                 Transformer transformer = transformerFactory.newTransformer(new StreamSource(xslt));
                 File f = null;
                 while ((f = workerData.next()) != null) {
                     if (filter.accept(f)) {
                         System.out.println("start transforming file=" + f.getCanonicalPath());
                         try {
-                            transformer.transform(new StreamSource(
-                                    f.getCanonicalPath().toLowerCase().endsWith(".gz")
+                            SAXSource saxSource = new SAXSource(xmlReader, new InputSource(
+                            f.getCanonicalPath().toLowerCase().endsWith(".gz")
                                             ? new GZIPInputStream(new FileInputStream(f))
-                                            : new FileInputStream(f)),
+                                            : new FileInputStream(f)));
+                            transformer.transform(saxSource,
                                     new StreamResult(new File(outputDir, f.getName() + outputExtension)));
                             System.out.println("done transforming file=" + f.getCanonicalPath());
                         } catch (Throwable e) {
diff --git a/src/main/java/com/curehunter/utils/LocalCacheEntityResolver.java b/src/main/java/com/curehunter/utils/LocalCacheEntityResolver.java
new file mode 100644
index 0000000..59d4dfd
--- /dev/null
+++ b/src/main/java/com/curehunter/utils/LocalCacheEntityResolver.java
@@ -0,0 +1,34 @@
+package com.curehunter.utils;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+public class LocalCacheEntityResolver implements EntityResolver {
+    private File dtdDirectory;
+    
+    public LocalCacheEntityResolver(File dtdDirectory) {
+        this.dtdDirectory = dtdDirectory;
+    }
+    
+    public InputSource resolveEntity(String publicId, String systemId)
+            throws SAXException, IOException {
+        if (systemId != null && dtdDirectory != null) {
+            int lastSlash = systemId.lastIndexOf('/');
+            String dtdFile = lastSlash != -1 ? systemId.substring(lastSlash + 1) : systemId; 
+            File candidate = new File(dtdDirectory, dtdFile);
+            if (candidate.exists() && candidate.isFile()) {
+                InputSource source = new InputSource(new FileReader(candidate));
+                source.setSystemId(candidate.getAbsolutePath());
+                return source;
+            } else {
+                System.err.println("Entity not found in directory, forcing remote lookup: " + systemId + " (public: " + publicId + ")");
+            }
+        }
+        return null;
+    }
+}