RE: [ebxml-cppa-negot] negotiability of BPSS instance document.

[Martin W Sachs <mwsachs@us.ibm.com>]

Negotiation over version may be OK. If others want to leave that in, I
would fix the words that I added to 10.2 and change 5.2 to talk only about
version. We certainly understand how to negotiate over version; it's just
one more of many enumerations.

However, I just looked at BPSS 1.05 and could not find anyplace that
defines the version of an instance document.  The version attribute in the
ProcessSpecification element is for the version of the BPSS specification.
Negotiation over that may be of some interest but I don't think it's what
we had in mid.

Unless I missed something, we cannot allow negotiation about a version of
an instance document because no such thing is defined. A new version of
what amounts to the same choreography definition would have to have a new
value of the name attribute.

On thinking about it, it is not clear to me why we ruled out negotiating
over the choice instance document at all.  The name of the instance
document is also a member of an enumeration.

If what I said above makes sense, I suggest changing the 3 places mentioned
below to say that the partners can negotiate over which instance document
to use.  Shall we specify using the name attribute or the UUID attribute?

Do we want to also provide for negotiating over the version of the
specification?  Does that require any changes to text or NDD schema?

The harder part is dealing with choices of instance document that
differently affect the details of the CollaborationRole element.  Shall we
keep that out of scope for V1 and put in V1  a requirement that all choices
must have the same CollaborationRole element structure?

Regards,
Marty



*************************************************************************************

Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown Hts, NY 10598
914-784-7287;  IBM tie line 863-7287
Notes address:  Martin W Sachs/Watson/IBM
Internet address:  mwsachs @ us.ibm.com
*************************************************************************************


                                                                                                                             
                      "Kartha,                                                                                               
                      Neelakantan"             To:       Martin W Sachs/Watson/IBM@IBMUS,                                    
                      <N_Kartha@stercom         ebxml-cppa-negot@lists.oasis-open.org                                        
                      m.com>                   cc:                                                                           
                                               Subject:  RE: [ebxml-cppa-negot] negotiability of BPSS instance document.     
                      11/12/2002 07:30                                                                                       
                      PM                                                                                                     
                                                                                                                             
                                                                                                                             



I would like to understand better the concern with possibility 2 before
ruling that out. Is the issue that
when versions change, so can aspects under CollaborationRole?

Kartha

-----Original Message-----
From: Martin W Sachs [mailto:mwsachs@us.ibm.com]
Sent: Tuesday, November 12, 2002 5:54 PM
To: ebxml-cppa-negot@lists.oasis-open.org
Subject: [ebxml-cppa-negot] negotiability of BPSS instance document.






We have some inconsistencies with regard to what is negotiable about the
BPSS instance document.

In section 5.2, it states that two partners can negotiate over which BPSS
instance document to use.

In 10.7, it states that the version of a BPSS instance document is
negotiable

In section 10.2, it now says (in response to a comment on the
last-distributed version of the specification): "Two prospective trading
partners SHOULD agree on the same BPSS instance document and assignment of
roles before beginning to negotiate the CPA."

We need to resolve the inconsistency.  Possibilities:

1. Put any negotiation about BPSS out beyond version 1.  For this I would
remove the statements in 5.2 and 10.7 and change the SHOULD to SHALL in
10.2.

2. Allow negotiation about the version of the same BPSS instance but not
more general.  This would require clarifying the statements in 5.2 and 10.2
to mention version but not allow negotiation of completely different BPSS
instances.
3. Allow negotiation about which BPSS instance document. (not just
version).

I believe that we understand how to negotiate about version but not how to
negotiate more generally about which BPSS instance document. However, I am
not sure that we know how to negotiate about roles or, perhaps, other
aspects of what is under the CollaborationRole element.

Given the lateness of the hour, I suggest that (1) is the only choice for
version 1.  If we agree on (1), I will add something to the futures
document.

Comments, please.

Regards,
Marty

****************************************************************************

*********

Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown Hts, NY 10598
914-784-7287;  IBM tie line 863-7287
Notes address:  Martin W Sachs/Watson/IBM
Internet address:  mwsachs @ us.ibm.com
****************************************************************************

*********


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