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RE: Choreography composition --- some relevant work

From: Fletcher, Tony <Tony.Fletcher@choreology.com>
Date: Thu, 17 Jul 2003 11:57:21 +0100
Message-ID: <221369570DEDF346AE42821041345E891956B9@exchange1.corp.choreology.com>
To: "Andrew Berry" <andyb@whyanbeel.net>, <public-ws-chor@w3.org>

Dear Andrew,

Welcome from me!  I am sure others will welcome you as well.  It sounds
to me as if the work you have done is exactly on the topic we are trying
to produce a 'standards' solution for.  Personally I would be happy with
the 'technical' content of what you say below as an expansion of our
'Mission Statement'.

This W3C WS-Choreography group has just set up a task force to look at
formalisms we could base our work on.  The lead is Frank (Francis McCabe
fgm@fla.fujitsu.com) and you may wish to make contact with him and that

Mike Champion (Mike.Champion@SoftwareAG-USA.com) and Monica Martin
(Monica.Martin@Sun.COM) are leading an 'Inputs' task force looking at
some existing languages such as WSCI, BPSS and so on.

Hope this helps you - looks like you will have some interesting
contributions to make.  Personally I appreciate your bringing in the
idea of contracts.  I think they are very relevant, but I was waiting
until the group was a bit further along before raising.

Best Regards     Tony
A M Fletcher
Cohesions  (TM)
Business transaction management software for application coordination
Choreology Ltd., 13 Austin Friars, London EC2N 2JX     UK
Tel: +44 (0) 20 76701787   Fax: +44 (0) 20 7670 1785  Mobile: +44 (0)
7801 948219
tony.fletcher@choreology.com     (Home: amfletcher@iee.org)

-----Original Message-----
From: public-ws-chor-request@w3.org
[mailto:public-ws-chor-request@w3.org] On Behalf Of Andrew Berry
Sent: 16 July 2003 14:22
To: public-ws-chor@w3.org
Subject: Choreography composition --- some relevant work


I'm a newcomer to the list and "choreography" lingo so forgive me if I 
have missed some important context.

I've been reading through the archives and noted that you're grappling 
with the issues of behavioural composition in a distributed context.  I 
spent several years of my PhD on this issue and hope that I can help.  
The thesis describes a choreography (or coordination) language, a 
formal execution semantics for the language, and a prototype for a 
distributed, asynchronous runtime engine implementing the semantics.  
The approach does not require any central mediator because execution 
progresses based on partial state held at each participant.

I've included some references to papers at the end of this email and 
can supply copies of those and the thesis on request.  The third paper 
is preceding but related work on the business/legal aspects of 
implementing contracts that I think might be quite relevant to 
choreography use cases.  The thesis has overview and example chapters 
that are fairly approachable for those without significant interest in 
the more formal and technical aspects of the work.

I'll try to follup up on a few threads with more specific comments.



1. A Berry and S Kaplan,
A Distributed Asynchronous Execution Semantics for Programming the 
Middleware Machine
Fifth International Symposium on Autonomous Distributed Systems, Dallas,
March 2001

2. A Berry and S Kaplan,
Open, Distributed Coordination with Finesse.
ACM Symposium on Applied Computing,
Atlanta, February 1998

3. Z Milosevic, A Berry, A Bond and K Raymond,
Supporting Business Contracts in Open Distributed Systems. Proceedings
of the International Workshop on Services in Distributed 
and Networked Environments,
IEEE, Whistler, Canada, June 1995. 
Received on Thursday, 17 July 2003 06:57:29 UTC

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