owl xml serialization

Hi,

I've reached the point where I'm writing the xml serializer/deserializer for 
my haskell owl 1.1 library. I've read through the syntax document [1] and 
also through the xsd but these alone don't give enough info to be able to 
work out exactly what goes where. In particular, I couldn't find examples in 
these docs about how to treat data values or annotations.

I'm resorting to generating little bits of OWL 1.1 in protege4 and then making 
my code round-trip to this. Not ideal, as I'll end up reproducing any bugs in 
the OWL 1.1 library used by protege4.

Is there a normative 'how to roundtrip the uml/functional syntax with xml' 
document?

Matthew


1: http://www.w3.org/Submission/owl11-xml_syntax/ 
2: http://www.w3.org/Submission/owl11-xml_syntax/schema/owl1.1.xsd