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Re: Definition of Terms

From: Ricky Ho <riho@cisco.com>
Date: Tue, 25 Mar 2003 13:23:18 -0800
Message-Id: <4.3.2.7.2.20030325132300.029fccd8@franklin.cisco.com>
To: Assaf Arkin <arkin@intalio.com>
Cc: "'WS Choreography (E-mail)'" <public-ws-chor@w3.org>

+1

Rgds, Ricky

At 12:22 PM 3/25/2003 -0800, Assaf Arkin wrote:

>Edwin Khodabakchian wrote:
>
>>Assaf,
>>
>>I am not sure what the correct verb would be for choreography. It seems 
>>to me that we want to highlight the contractual nature of the 
>>choreography (more than the fact that his has a beginning and an end). 
>>May be: an application/service *complies* with a role define in a 
>>choreography. All I am recommending is that we do not use the same term 
>>for choreography and orchestration.
>>
>>I have one more question: Could you please help me understand what you 
>>mean by "a choreography may involve multiple such conversions"? I am 
>>trying to see how this sentence fits with a "conversation as an 
>>instantiation of a choreography (similar to how an object is an instance 
>>of a class)".
>>
>>Thank you,
>>
>>Edwin
>
>When two participants talk to each other they engage in a conversation. 
>All other participants are not necessarily aware of that conversation, 
>when it does not involve them. So a multi-party choreography can express 
>multiple conversations that are going on and overlapping with each other, 
>by allowing a conversation to be scoped to a subset of the parties.
>
>In fact, what a multi-party tries to do is express how multiple 
>conversations are brought together in a larger context. It can express the 
>causal dependency between these conversations and put a larger context in 
>which such relationships can be depicted.
>
>For example, the patient-receptionist-doctor (PRD) scenario involves three 
>conversations and expresses the relationship between these conversations:
>
>1. Patient-receptionist
>2. Receptionist-doctor
>3. Doctor-patient
>
>These conversations do not follow each other: they are interleaved. The 
>choreography starts and actuall ends in the scope of the 
>patient-receptionist conversation (from hi to bye). The 
>receptionist-doctor conversation starts before the doctor-patient but 
>concludes after the doctor-patient (doctor notifies recipient it is now 
>able to accept patients).
>
>There are much easier means to express sequences of conversations, but the 
>only one that can express interleaved conversations with dependency 
>between these conversations, is the multi-party choreography,
>
>arkin
>
>
>--
>"Those who can, do; those who can't, make screenshots"
>
>----------------------------------------------------------------------
>Assaf Arkin                                          arkin@intalio.com
>Intalio Inc.                                           www.intalio.com
>The Business Process Management Company                 (650) 577 4700
>
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Received on Tuesday, 25 March 2003 16:23:31 GMT

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