ebXML and UDDI

I was reading the ebXML reg/rep white paper on using UDDI to find an 
ebXML reg/rep (http://www.ebxml.org/specs/rrUDDI.pdf), and had a
couple of questions:

 1. Have canonical UDDI tModels been defined  for reg/reps, CPPs etc. as
    suggested in this document?

 2. If there is a move to define tModels for things that are stored
    in a ebXML repository (e.g. CPPs, schemas etc.) does it make
    sense to use a UDDI registry in place of an ebXML registry? Or
    are there some things that the UDDI registry can not do that
    is required from an ebXML registry? If so, are are proposals
    that would bring the UDDI and ebXML registries closer in intent
    and functionality?

Any pointers would be appreciated! Thanks,

- Vivek