I've run the Castro code generator on a large and complicated XML
Schema (xsd) containing many nested grouping models (choice within
sequence within sequence within choice, etc.).  The resulting code
contains many "intermediate" classes such (assuming a class named
Abst.java) AbstSequence.java, AbstSequenceSequence.java,
AbstSequenceSequenceSequenceChoiceSequence.java, etc., etc.

Is this normal?!?  Am I doing something wrong?  How do I use these
classes to unmarshal the data in my XML.  Can I configure things so
that these classes don't show up at all?  I thought of somehow
eliminating the grouping models from my schema altogether, but I don't
know how to do that, or if that is even possible or makes sense.

FYI, in my app I will never be marshalling data into XML.  I've got
many thousands of valid, well-formed XML instance files that I only
need to read (i.e., unmarshal).

Any help appreciated.