Quanta as ODF editor?

I was wondering whether I might be able to use Quanta as an editor of
the ODF file format the same way that it is a useful editor of
DocBook.  Since Quanta has the nice 'load and convert DTD' feature, I
thought: "Great, I'll load the DTD to create the DTEP in tagXML so
that I have a toolbar, entity awarness, tag completion etc.

However, ODF is expressed in Relax NG, not XML schema so there is no
DTD for ODF.  Is it possible to make Quanta capable of understanding
the Relax NG grammar?

As a workaround for providing ODF support, it might be possible to
create a DTD from the Relax NG schema using a tool like Trang
(http://www.thaiopensource.com/relaxng/trang.html) However the two
schema languages are not the same and thus the Trang tool has
limitations such that any conversion would be lossy
(http://www.thaiopensource.com/relaxng/trang-manual.html#dtd-output).
In effect, this workaround could only achieve a pseudo-ODF editor.

-- 
A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?