I am trying to generate classes for JDF format, as available from here. I have tried using the xsd.exe tool and the error/warning that pops up is:
"Schema validation warning: Type is not declared, or is not a simple type."
And correct, the type is defined in an imported XSD file and is indeed a complex type.
When I open the XSD schema in Altova it all works like a charm, so there doesn't seem to be anything wrong with the schema itself.