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RE: A trial balloon distinction between choreography & orchestration

From: Ugo Corda <UCorda@SeeBeyond.com>
Date: Wed, 12 Nov 2003 10:44:43 -0800
Message-ID: <EDDE2977F3D216428E903370E3EBDDC9032B8950@MAIL01.stc.com>
To: "Steve Ross-Talbot" <steve@enigmatec.net>, <public-ws-chor@w3.org>

Steve,

I think your orchestration definition below is too vague and could refer to meanings that are not related to orchestration at all (for example, "the way a single Web service should be used is by sending messages as specified in the corresponding WSDL file, at the address specified in the same file"). 

A more appropriate definition would be, in my mind, something like:

A written business protocol (i.e. abstract WS-BPEL) description documents how a set of Web Services should be "used", as expressed from the point of view of one of the participating Web services.

Ugo

> -----Original Message-----
> From: public-ws-chor-request@w3.org
> [mailto:public-ws-chor-request@w3.org]On Behalf Of Steve Ross-Talbot
> Sent: Tuesday, November 11, 2003 11:32 PM
> To: public-ws-chor@w3.org
> Subject: Fwd: A trial balloon distinction between choreography &
> orchestration
> 
> 
> 
> As an aside from all of the stuff going on in requirements I would be 
> interested on peoples take on what Frank postulated as a distinction 
> between the O word and the C word. As a guiding principle in 
> how we may 
> view a CDL is this helpful?
> 
> Suppose we changed it slightly to read:
> 
> 	A written choreography description documents how a set 
> of Web Services 
> should be "used".
> 
> This minor change could then incorporate design-time use as well as 
> run-time use (for conformance and compliance to a choreography).
> 
> On the other hand WS-BPEL executable processes falls into the latter 
> (the O-word) and abstract processes  are a modified lesser form of 
> contract such as:
> 
> 	A written business protocol (i.e. abstract WS-BPEL) description 
> describes how a single Web Service 	should be "used".
> 
> Just a thought ....
> 
> Cheers
> 
> Steve T
> 
> Begin forwarded message:
> 
> > Resent-From: public-ws-chor@w3.org
> > From: Frank McCabe <frankmccabe@mac.com>
> > Date: Tue Sep 23, 2003  2:36:33  am Europe/London
> > To: public-ws-chor@w3.org
> > Subject: A trial balloon distinction between choreography & 
> > orchestration
> >
> >
> > I am aware that the O word is taboo. However, the following 
> occurred 
> > to me during the last F2F:
> >
> > A written choreography description documents how to *use* a 
> set of Web 
> > services
> > A written orchestration description documents how to 
> *control* a set 
> > of Web services
> >
> > Comments?
> > Frank
> >
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Received on Wednesday, 12 November 2003 13:44:44 GMT

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