RE: more on collaborations, contracts and 2-27 minutes

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

This is in reply both to Stefano's posting and to Jamie Clark's posting
that it references (see below).

The CPA should specify whether messages are sequence-numbered.  The CPA
specification has to be in sync with the messaging specification.  I am not
sure that the definition of sequence numbers is complete in the messaging
spec. at this time.

Whether the sequence counts find their way up to the business application
is a messaging service and other middleware matter.

As to messages referencing each other, the message header includes a
RefToMessageId element, which is for that purpose.

As Stefano reminds us, the whole question of ebXML middleware (BSI)
interoperability and a conceptual upper interface to the messaging service
have thus far been ignored by ebXML.

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



Stefano POGLIANI <stefano.pogliani@sun.com> on 03/06/2001 04:15:58 AM

Please respond to stefano.pogliani@sun.com

To:   James Bryce Clark <jbc@lawyer.com>, "Welsh, David"
      <David.Welsh@nordstrom.com>
cc:   ebxml-bp@lists.ebxml.org, Karsten.Riemer@east.sun.com,
      linkage@interaccess.com, sharma@netfish.com,
      Dale_Moberg@stercomm.com, duane@xmlglobal.com
Subject:  RE: more on collaborations, contracts and 2-27 minutes




Hope  not to miss the point completely.... in which case I  apologize.

The  verification of the correct sequencing should be done by the
middleware (the  infamous BSI) which should be configured out of the
content of the CPA (which,  in turn, references the Collaboration
choreography specified by the  BP).

/stefano
-----Original Message-----
From: James Bryce Clark  [mailto:jbc@lawyer.com]
Sent: 05 March 2001 22:05
To:  Welsh, David
Cc: 'James Bryce Clark'; ebxml-bp@lists.ebxml.org;
Karsten.Riemer@east.sun.com; linkage@interaccess.com; sharma@netfish.com;
Dale_Moberg@stercomm.com; duane@xmlglobal.com
Subject: RE: more on  collaborations, contracts and 2-27 minutes

Dave asks for  confirmation that something in ebXML can tag and count
messages sequentially,  so as to enable crossreferencing, detection of
blips arriving out of sequence,  and the like:

 "I can  understand that at a lower level TRP service, there's something
dealing with  'message counting' but I'm not aware that something like this
info finds  it's way up the stack so the business app's can also do their
counting;  which does sound like redundant but it is the way of the world
and as such  it's not going to stop. "
In our "simple negotiation  pattern" test, we also noted that messages need
to be able to cross reference  each other, and sought confirmation of some
kind of unique message  ID.

Good questions.  I don't know the answer.   Can we  do that?   Goes on my
list for tomorrow's metamodel  meeting.   Jamie

James Bryce Clark
Spolin Silverman &  Cohen LLP
310 586 2404    jbc@lawyer.com

James Bryce Clark
Spolin Silverman & Cohen LLP
310 586 2404     jbc@lawyer.com