[xml] Inspecting a RelaxNG schema

[Luigi Ballabio <luigi ballabio riskmap it>]

Hi all,
	apologies if I missed any relevant FAQ or documentation entries. I'm using 
the Python bindings (specifically, the RelaxNG module API) to parse a 
RelaxNG schema. What I'm doing is:

>>> from libxmlmods import libxml2mod
>>> ctxt = libxml2mod.xmlRelaxNGNewParserCtxt('foo.rng')
>>> schema = libxml2mod.xmlRelaxNGParse(ctxt)

which, I guess, is a fairly direct translation of the corresponding C code.

By the end of the last instruction, the RelaxNG module has made most of the 
work I'm interested in at the time. In particular, and if I'm not mistaken, 
it descended into any documents referenced by <include> nodes in order to 
build the full schema (well, it wanted the referenced files to be there, so 
I assumed it did read them.) The problem is, the resulting xmlRelaxNGPtr is 
returned to Python as a very much opaque PyCObject pointer.

My question is, is there any exported function in the module which will 
allow me to inspect the created schema? Can it be converted to some less 
opaque structure? Or should I resort to coding in C <shudder>?

Thanks in advance,
                Luigi