IDMP-655 - Revise the Commons ontologies and related changes for Commons 1.1 #476
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…cepts including time period, explicit time period, and a number of properties (monotonically - i.e., in a backwards compatible way with the prior version Signed-off-by: Elisa Kendall <[email protected]>
…ons 1.1 revision, which simplifies some constructs, such as Specification, moving it to the top level rather than as a subclass of arrangement, refines definitions, adds examples and sources for definitions, and eliminates reporting related concepts, which may be included in a separate ontology in a subsequent revision Signed-off-by: Elisa Kendall <[email protected]>
… 'ScalarQuantityValue', and 'QuantityValueRange' to 'ScalarQuantityValueRange' per the revisions made by OMG in the Commons 1.1 revision to the Quantities and Units ontology Signed-off-by: Elisa Kendall <[email protected]>
Signed-off-by: Elisa Kendall <[email protected]>
…r the latest update to the Commons library (no semantic changes, strictly ontology prefix and IRI) Signed-off-by: Elisa Kendall <[email protected]>
Signed-off-by: mereolog <[email protected]>
mereolog
changed the title
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constant and variables should not be limited to scalar quantity values according to their definitions. If the formula and expression is a vector formula, then constants and variables are not limited to scalars. |
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| <rdfs:label>agent</rdfs:label> | |||
| <rdfs:seeAlso rdf:datatype="&xsd;anyURI">http://www.jamesodell.com/WhatIsAnAgent.pdf</rdfs:seeAlso> | |||
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www.jamesodell.com is no longer available on the web
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@tw-osthus I'll raise an issue to revise the link, then. He certainly was when we did the original work for FIBO, and has been a long time participant in an Agents and Events metamodel effort at OMG that is still poking along.
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| </owl:Class> | |||
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| <owl:Class rdf:about="&cmns-qtu;Constant"> | |||
| <rdfs:subClassOf rdf:resource="&cmns-qtu;QuantityValue"/> | |||
| <rdfs:subClassOf rdf:resource="&cmns-qtu;ScalarQuantityValue"/> | |||
| <rdfs:label>constant</rdfs:label> | |||
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why are constants limited to scalars?
In vector formulas, constants are most likely vectors too.
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@tw-osthus We made those changes because we have work planned to bring in vector and tensor quantities at the higher level, and so we didn't want to cause too much downstream churn once those additions are made. The work is based on the new SysML v2 library for quantities and units, which we are doing at OMG in conjunction with the European Space Agency, a number of US and EU government and military organizations, NASA/JPL, and many others such as John Deere, Boeing, and Airbus. Several of them suggested the name change for now so that once we add the more complex content we limit churn in the ontology. Hope that makes sense.
| <dct:source>ISO 11240 Health informatics - Identification of medicinal products - Data elements and structures for the unique identification and exchange of units of measurement, clause 3.1.24</dct:source> | ||
| <dct:source>ISO 80000-1:2009 Quantities and units - Part 1: General, clause 3.1</dct:source> | ||
| <dct:source rdf:datatype="&xsd;anyURI">https://www.omg.org/spec/SysML/</dct:source> | ||
| <skos:definition>property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed by means of a number and a reference</skos:definition> |
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The definition is unclear.
Is the velocity when I walk in a northern direction a scalar quantity?
6 * km/h * = number (6) times scalar reference velocity / measurement unit (km/h) times Northern direction
Is north-velocity a scalar quantity because the reference includes the vector?
or is there only a vector quantity because the magnitude is always a scalar as in ISO 80000?
What about tensors?
Should there be a definition for quantity?
What is a vector quantity?
What is a tensor quantity?
Velocity should be a vector quantity because it is directional in classical space (it is AFAIK a tensor in relativistic space).
but its direction independent magnitude is a scalar.
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@tw-osthus Extensions for tensors and vectors are planned (actually in work) for sometime in the first half of next year.
@tw-osthus See my comment about adding a much richer representation for tensor and vector quantities over the next several months. The intent is to create a small ontology defining arrays, tensors and vectors, and to reuse that in an extension to the quantities and units ontology to enable representation of tensor and vector related quantities. The current model doesn't support them, so we changed the names to minimize the amount of change needed later and to be clear about what this version of the ontology covers. |
@tw-osthus They are not limited - we have not built those out yet ... waiting to have the complete set of units before we generate a library of the most common ones. |
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