Add docs for new normalize function.

modules/ROOT/pages/deprecations-additions-removals-compatibility.adoc

@@ -32,9 +32,9 @@ label:deprecated[]
 RETURN 1 as my\u0085identifier
 ----
 a|
-The Unicode character \`\u0085` is deprecated for unescaped identifiers and will be considered as a whitespace character in the future. 
+The Unicode character \`\u0085` is deprecated for unescaped identifiers and will be considered as a whitespace character in the future.
 To continue using it, escape the identifier by adding backticks around the identifier.
-This applies to all unescaped identifiers in Cypher, such as label expressions, properties, variable names or parameters. 
+This applies to all unescaped identifiers in Cypher, such as label expressions, properties, variable names or parameters.
 In the given example, the quoted identifier would be \`my�identifier`.
 
 a|
@@ -65,6 +65,27 @@ The following Unicode Characters are deprecated in identifiers:
 
 |===
 
+=== New features
+
+[cols="2", options="header"]
+|===
+| Feature
+| Details
+
+a|
+label:functionality[]
+label:new[]
+
+[source, cypher, role=noheader]
+----
+RETURN normalize("string", NFC)
+----
+
+| Introduction of a xref::functions/string.adoc#functions-normalize[normalize()] function.
+Normalize a `STRING` according to the specified normalization form, which can be of type `NFC`, `NFD`, `NFKC` or `NFKD`.
+
+|===
+
 [[cypher-deprecations-additions-removals-5.14]]
 == Neo4j 5.14
 

modules/ROOT/pages/functions/index.adoc

@@ -496,6 +496,12 @@ These functions are used to manipulate strings or to create a string representat
 | `ltrim(input :: STRING) :: STRING`
 | Returns the given `STRING` with leading whitespace removed.
 
+1.2+| xref::functions/string.adoc#functions-normalize[`normalize()`]
+| `normalize(input :: STRING) :: STRING`
+| Returns the given `STRING` normalized using the normal form 'NFC'.
+| `normalize(input :: STRING, normalForm = NFC :: [NFC, NFD, NFKC, NFKD]) :: STRING`
+| Returns the given `STRING` normalized according to the specified normalization form.
+
 1.1+| xref::functions/string.adoc#functions-replace[`replace()`]
 | `replace(original :: STRING, search :: STRING, replace :: STRING) :: STRING`
 | Returns a `STRING` in which all occurrences of a specified search `STRING` in the given `STRING` have been replaced by another (specified) replacement `STRING`.

modules/ROOT/pages/functions/string.adoc

@@ -148,6 +148,138 @@ RETURN ltrim('   hello')
 
 ======
 
+
+
+[[functions-normalize]]
+== normalize()
+
+`normalize()` returns the given `STRING` normalized using the `NFC` normalization form.
+
+*Syntax:*
+
+[source, syntax, role="noheader"]
+----
+normalize(input)
+----
+
+*Returns:*
+
+|===
+
+| `STRING`
+
+|===
+
+*Arguments:*
+
+[options="header"]
+|===
+| Name | Description
+
+| `input`
+| An expression that returns a `STRING`.
+
+|===
+
+*Considerations:*
+
+|===
+
+| `normalize(null)` returns `null`.
+
+|===
+
+
+.+normalize()+
+======
+
+.Query
+[source, cypher, indent=0]
+----
+RETURN normalize('\u212B') = '\u00C5' AS result
+----
+
+.Result
+[role="queryresult",options="header,footer",cols="1*<m"]
+|===
+
+| +result+
+| +true+
+1+d|Rows: 1
+
+|===
+
+======
+
+
+[[functions-normalize-with-normal-form]]
+== normalize(), with specified normal form
+
+`normalize()` returns the given `STRING` normalized using the specified normalization form.
+The normalization form can be of type `NFC`, `NFD`, `NFKC` or `NFKD`.
+
+*Syntax:*
+
+[source, syntax, role="noheader"]
+----
+normalize(input, normalForm)
+----
+
+*Returns:*
+
+|===
+
+| `STRING`
+
+|===
+
+*Arguments:*
+
+[options="header"]
+|===
+| Name | Description
+
+| `input`
+| An expression that returns a `STRING`.
+
+
+| `normalForm`
+| A keyword specifying the normal form, can be `NFC`, `NFD`, `NFKC` or `NFKD`.
+
+|===
+
+*Considerations:*
+
+|===
+
+| `normalize(null, null)` returns `null`.
+| `normalize(null, NFC)` returns `null`.
+| `normalize("hello", null)` returns `null`.
+
+|===
+
+
+.+normalize()+
+======
+
+.Query
+[source, cypher, indent=0]
+----
+RETURN normalize('\uFE64', NFKC) = '\u003C' AS result
+----
+
+.Result
+[role="queryresult",options="header,footer",cols="1*<m"]
+|===
+
+| +result+
+| +true+
+1+d|Rows: 1
+
+|===
+
+======
+
 [[functions-replace]]
 == replace()