how to force schema compiled classes to extend specific class outside schema

Question

Need help with following situation: Users can generate their own data structures which are stored as JAXB-ready XSD sources like below:

Answer 1

Many thanks to D.Shawley for pointing out the right section in JSR 222. Here is final solution which might be helpful and time saving for someone else. Original schema must be transformed as follows:

Transformation can be easily performed via org.w3c.dom.Document inteface.