Hello,
at first i would like to say thanks a lot for your confidence. I will do my best.
Now the little question. I don't loose time and refactoring my code (XML validation functions). I created new data types for DTD, XSD and RNG but don't know where may I put validation code. Is better place in src/backend/utils/adt/xml.c or create new file inside contrib/xml2 folder.
I am looking forward to our cooperation,
Tomas Pospisil