Full validation of an ODF document?

As we all you know,  we have multiple
levels to an ODF document:

1) a packaging convention

2) a RELAX NG schema

3) document fragments based on other
standards which may have schemas based on DTD or XML Schema

Maybe a dumb question, but I don't see
it answered anywhere -- is there any tool out there that will validate
at least 2 & 3 above?  For example, something which will validate
the main document via RELAX NG and will then call out to an XML Schema
validator to validate the contained MathML?  The normative grammar
of the ODF spec merely says <anyName /> which is not sufficient on
its own.

Also, has anyone attempted to express
ODF completely in a single schema language, to facilitate such automated
validation, perhaps by using a non-normative XML Schema-based grammar?
 Or by creating a RELAX NG for MathML, SVG, XLink, XForms, etc. ?
 

-Rob