I figured it out. When the parser includes the referenced document, it uses the namespace in the included document, not the parent. Since I was defining a namespace in the parent, but not in the child, the parser was inserting a namespace declaration of "", and so the RelaxNG schema was pr...

I have a document that I'm validating against a RelaxNG schema, and whenever I have a document that uses an XInclude to reference another entity, the validation fails complaining that the element that I'm referencing is not allowed in this context. However, if I paste the element inline and remove t...