XSLT and XPath function reference in alphabetical order
(Excerpt from “XSLT 2.0 & XPath 2.0” by Frank Bongers, chapter 5, translated from German)
Functions in connection with qualified identifiers (QNames)
A xs:string string; the URI string being lexically of xs:anyURI type assigned to the namespace of the QName passed on.
Optional. An identifier of xs:QName type whose namespace URI string shall be determined as xs:anyURI.
Purpose of use:
The function returns the URI string of the namespace of a QName passed on to it after its expansion as xs:anyURI. If the QName expanded in this way has no namespace portion, a xs:anyURI URI string is returned which corresponds to the empty string. If the argument passed on is the empty sequence, the function returns an empty result sequence.
The function is not available.
fn:namespace-uri-from-QName($arg as xs:QName?) as xs:anyURI?
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