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Use of ID/IDREF in XSD

I have a schema with a lot of xsd:ID and xsd:IDREF. I’m trying to add some assertions to a redefined schema that require dereferencing the id. Here is an assert:


<xs:assert test="id(PersonId)/Profession/@label != ''" xpathDefaultNamespace="##defaultNamespace"/>


However, when testing an instance, Saxon throws Description: Element n1:Candidate does not satisfy assertion id(PersonId)/Profession/@label != ''”


XMLSpy is similarly displeased.


From what I’ve read on the internet, idref and id can only be used with DTD? I’m not sure why, a schema aware engine should be able to infer the data types of the tags as well.


Code is here:



John Dziurłaj


Elections Consultant

Hilton Roscoe LLC
Cell 330-714-8935 Work/Fax 234-706-6434


PGP Fingerprint: 8466 BB28 6A92 EE06 F71D 1519 FB42 2861 6DC0 E92C


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