xs:import and xs:include should be available for XSD fragments that are not declared as Nuxeo Schemas

When the SchemaManager loads the contribution, it will copy the XSD file to the target folder (nxserver/schemas).
The XSD files will then be loaded from here.

As a result, XSD files that are not referenced by the contribution won't be copied and then won't be available.

This means that for xs:include and xs:import directives to work, the referenced XSD should have been previously declared as a Nuxeo schema ...

 <schema name="myincludefragment" src="schemas/myincludefragment.xsd" prefix="mcc"/>

 <schema name="myschema" src="schemas/myschema.xsd" prefix="rt" />

The goal if this issue if to avoid having to declare fake schemas ...