[ebxml-cppa-negot] Re: Negotiation pattern, transactions, CPPA

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

Bob,

The race condition issue is simply this:  Some protocols might get to a
point where the two parties, more or less simultaneously, send request
messages to each other.  The two requests might be conflicting proposals
for some particular aspect of the CPPA being negotiated.  It that point, it
may not be clear whose proposal takes precedence.  That in turn could lead
to conflicting responses, at which point the state of the draft CPPA might
be unclear.

I am deliberately using words like "may", "could", and "might" because we
have not analyzed the proposed approaches in very much detail yet. We are
simply trying to avoid situations like that in the hopes of arriving at a
simpler protocol.

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


                                                                                                                                 
                      bhaugen                                                                                                    
                      <linkage@interacc        To:       ebtwg-bps@lists.ebtwg.org                                               
                      ess.com>                 cc:                                                                               
                                               Subject:  Negotiation pattern, transactions, CPPA                                 
                      03/05/2002 12:11                                                                                           
                      PM                                                                                                         
                                                                                                                                 
                                                                                                                                 



I assume some of the members of this list
also participate in the CPPA project.
There are some questions below, after
a probably tedious prelude.

There is a current issue in the CPPA Negotiation
group about the ebXML V1.0 Simple Negotiation
Pattern, the BPSS transaction protocol, and
the use of the two for CPPA negotiation.

I haven't been involved in the whole discussion,
and so cannot write an accurate summary,
but the upshot seems to be that they have
decided they cannot use the Negotiation
Pattern and are also trying to develop
an extended transaction protocol.

One of the issues is "race conditions"
in either the Negotiation Pattern or
the BPSS transaction protocol,
I'm not sure which.

One of the problems here is that nobody
that I know of has implemented the
Negotiation Pattern as a BPSS
instance.  (What do you call those
these days?)

So my questions for this group are:
1. Has anybody implemented the Negotiation
Pattern as a BPSS instance?
2. Does anybody understand what the CPPA
"race condition" issue means? (I've asked them
several times with no response.)
3. Does anybody want to join the CPPA
conference call tomorrow afternoon 3-4PM EST
to help figure out the BPSS angles?  I'm out
of touch.

Call info:
Dial in #: 888-481-3032
Internation dial in: 617 801 9600
Participant pass code: 357644

Thanks,
Bob Haugen



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