IOTPV2: XML messaging

[Ko Fujimura <fujimura@isl.ntt.co.jp>]

In <http://www.ietf.org/internet-drafts/draft-ietf-trade-iotp2-req-00.txt>:

> INTERNET-DRAFT            IOTP v2 Requirements             February 2001
> 
> 
> 1. Introduction
> 
>    Verion 2 of the Internet Open Trading Protocol (IOTP) will extend the
>    interoperable framework for Internet commerce capabilities of Version
>    1 [RFC 2801] as described in Section 3 below.  In addition, it will
>    replace the ad hoc XML messaging and digitial signature [RFC 2802]
>    parts of IOTP v1 with standards based mechanisms.

Which XML messaging protocols will be used for replacing current XML messaging?
Do you assume that ebXML TR/P for underlying protocol of IOTP version 2?
I would like to know the direction of the language design. 

Thanks,

Ko Fujimura, NTT