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If I feed the following stylesheet into an XSLT 3 processor, will the
output be implementation dependant?
<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:fn="http://www.w3.org/2005/xpath-functions" exclude-result-prefixes="xsl xs fn"> <xsl:output omit-xml-declaration="yes" /> <xsl:variable name="SomeDate" as="xs:date" select="xs:date('-0001-03-01')" /> <xsl:template match="/"> <aYearLater><xsl:value-of select="$SomeDate + xs:dayTimeDuration('P365D')" /> </aYearLater> </xsl:template> </xsl:stylesheet> This question really boils down to: Are compliant XSLT 3.0 processors required to respect a specific version of XML Schema?, or is the implementer free to choose? My reading of the XSLT 3.0 spec (draft 10) says the are free to choose, however I could easily be mistaken about this. The spec is replete with many references to XSD 1.1, and none to XSD 1.0 . XSD 1.0 is not even listed in the normative references, which one could interpret as a rule that a compliant processor must respect XSD 1.1, and not XSD 1.0 . If the XML processor under the XSLT processor respects XSD 1.0, then, by my calculations, the output should be ... <aYearLater>0001-02-29</aYearLater> ... but if XSD 1.1, then it should be ... <aYearLater>0000-03-01</aYearLater> On a side note, if you change the xsl:stylesheet/@version to 2.0 and feed the stylesheet to Saxon HE 9.5, then you get output ... <aYearLater>0001-03-01</aYearLater>
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