I'm using the schemavalidate task of Ant to validate XML documents.
<schemavalidate
noNamespaceFile="${user.input.xsd}" file="${user.input.xml}">
</schemavalidate>
This works as expected. But now I have schema files using XInclude like this:
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xi="http://www.w3.org/2001/XInclude">
<xi:include href="..." xpointer="xmlns(xs=http://www.w3.org/2001/XMLSchema)xpointer(/xs:schema/xs:*)"/>
</xs:schema>
This gives the following error in Ant:
foo.xsd:8:136: s4s-elt-schema-ns: The namespace of element 'include' must be from the schema namespace, 'http://www.w3.org/2001/XMLSchema'.
Now I tried enabling XInclude processing by enabling the corresponding feature:
<schemavalidate
noNamespaceFile="${user.input.xsd}" file="${user.input.xml}">
<attribute name="http://apache.org/xml/features/xinclude" value="true"/>
</schemavalidate>
But this doesn't help, the error message stays the same. The feature seems to be recognised by the parser, because when I change the attribute element to use some non-existing feature, I get a corresponding error message, e.g.
Parser org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser doesn't recognize feature http://apache.org/xml/features/xinclud
Is it possible to enable XInclude processing here?
Edit 1
When enabling Ant debug mode, I can see that the feature is set correctly:
[schemavalidate] Using SAX2 reader org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser
[schemavalidate] Setting feature http://xml.org/sax/features/validation=true
[schemavalidate] Setting feature http://apache.org/xml/features/xinclude=true
[schemavalidate] Setting feature http://xml.org/sax/features/namespaces=true
[schemavalidate] Setting feature http://apache.org/xml/features/validation/schema=true
[schemavalidate] Setting feature http://apache.org/xml/features/validation/schema-full-checking=true
[schemavalidate] Validating foo.xml...
