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Re: Revised: Mission Statement

From: Steve Ross-Talbot <steve@enigmatec.net>
Date: Tue, 1 Jul 2003 18:52:21 +0100
Cc: <public-ws-chor@w3.org>
To: "Yaron Y. Goland" <ygoland@bea.com>
Message-Id: <C3DDC3E4-ABEC-11D7-AFD8-000393AD2AA6@enigmatec.net>

+1

Having some understanding of the achitecture of this thing that we are 
doing
would help us stay on the same page.

If we have a global model then where does it sit with respect to any N 
participants.
Is it in the middle of all of them?
Is it at each one's site?
Is it a proxy sort of thing?
Is it a web service itself?

What happens when we have two of them and we wish to compose?
What happens to the originals?
Where does the new one reside?

I could go on. It would just be nice to get a common understanding. I 
have mine
but I'm not sure it's the same as other peoples.

Cheers

Steve T

On Tuesday, July 1, 2003, at 06:33  pm, Yaron Y. Goland wrote:

>
> The key issue for me is what does it mean to compose a web service? 
> Does
> this mean a new WSDL with some computer behind it that then forwards
> requests to existing web services? Does this mean that a client is 
> expected
> to send messages to different WS who all have some kind of 
> relationship with
> each other? It's so vague that I'm not sure what scope we would be 
> signing
> up for.
>
>
>
>> -----Original Message-----
>> From: Monica J. Martin [mailto:monica.martin@sun.com]
>> Sent: Monday, June 30, 2003 2:22 PM
>> To: Yaron Y. Goland
>> Cc: Francis McCabe; Burdett, David; Bonneau, Richard; Assaf Arkin;
>> Jean-Jacques Dubray; public-ws-chor@w3.org
>> Subject: Re: Revised: Mission Statement
>>
>>
>>>
>>>
>>> Goland: I don't understand what the terms service composition
>> and service semantics
>>> mean. Could someone please define them? Monica provides a whole mess 
>>> of
>>> definitions but having 10 definitions is just as bad as having none.
>>>
>>> mm1:  The definitions were a compilation on various types of
>> composition from the team.  We have not settled on one
>> definition, although I have provided one below that seems
>> appropriate here for consideration.  The definitions provided
>> span different areas of composition, and whether the team agrees
>> they are all the same, I can not speculate on.  I think it
>> evidences the multiple levels of discussions that are occurring.
>> Don't shoot the messenger. I would propose: **A service
>> composition is a composition of services that results in a new
>> service. The new service can be the combination of distinct parts
>> to form a whole of the same generic type. The web services could
>> be combined to achieve a specific goal.*  *This integrates parts
>> of the definitions of recursive, web service and choreography 
>> composition.
>>>  Monica
>>>
>>
>>
>
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Received on Tuesday, 1 July 2003 13:53:12 GMT

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