SCXML / CCXML Thesis

I'm doing a thesis about CCXML/SCXML in UCL Belgium  
(www.uclouvain.be) and I have some little question.
I'd like to be sure that what I'm writing is true.

- Is it really possible to build a comlete CCXML interpreter in top  
of a SCXML interpreter? It's possible to re-write some commands
like <accept> but is it possible for the whole set?
- Is it possible with Common-SCXML implementation?
- I'm not sure that I really understand what is <invoke>. Is it  
possible to write a targettype RPC and to do RCP with this command?

I'm currently studying the possibility to re-write all the CCXML  
commands in SCXML to build a new CCXML interpreter.
--

Simon Gillet
somm15@gmail.com