[cddlm] CDL test files

[Steve Loughran]

I am seeking as many possible CDL test files to put into the set of test 
files I'm building up on sourceforge.


Categories wanted


-files that test the XSD matches what we expect.

-files that are valid syntax, but invalid semantics
   - references that dont resolve
   - duplicate names
   - any other error documents

-files that are valid. Particular those with early/late references, and 
what they should resolve to.

I have all the examples of the CDL spec pasted in, but I want more 
examples to test references and expressions.

What test files are the other implementors using?

-steve