- From: lei lihui <lei_li_hui_2003@yahoo.com.cn>
- Date: Tue, 16 May 2006 13:33:59 +0800 (CST)
- To: public-sws-ig@w3.org
Dear all,
I do not understand the execution of composite services combined with Split .
Could you give me a scenario that can be implemented with a composite service combined with Split .
>From the OWL-S process model (http://www.w3.org/Submission/OWL-S/#5),
I know that " the components of a Split process are a bag of process components to be executed concurrently and Split completes as soon as all of its component processes have been scheduled for execution".
Suppose there is a composite process E which is executed as follows:
Split(A, B), afterwards, Sequence(C,D)
Process E
<sequence>
<first>
<split>
<process> A </process>
<process> B</process>
</split>
</fist>
<rest>
<sequene>
<process> C </process>
<process> D </process>
</sequene>
<rest>
There are two scenarios may occur:
1. A and B do not return any information to E,
2. A and B return some information to E at any time.
What is the temporal relationship between A, B, C and D?
I think that:
If A and B do not return any information to E, then A, B, C, and D are executed in parallel. If A and B return some information to E, suppose the outputs of A is the part of inputs of C and the outputs of B is the part of inputs of D, then
A, B, C, and D are executed in parallel with some constraints (A is before C, B is before D, and C is before D) such that the temporal relationship may be (ABCD), (BACD), and (ACBD).
Please send me comments and discuss with me.Thanks.
Best regards.
Lihui Lei
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<div>Dear all,<BR> <BR>I do not understand the execution of composite services combined with Split .<BR>Could you give me a scenario that can be implemented with a composite service combined with Split . <BR> <BR> <BR>From the OWL-S process model (<A href="http://www.w3.org/Submission/OWL-S/#5">http://www.w3.org/Submission/OWL-S/#5</A>), <BR>I know that " the components of a Split process are a bag of process components to be executed concurrently and Split completes as soon as all of its component processes have been scheduled for execution".<BR> <BR>Suppose there is a composite process E which is executed as follows: </div> <div>Split(A, B), afterwards, Sequence(C,D)</div> <div> </div> <div>Process E</div> <div> <sequence> </div> <div> <first></div> <div> <split> </div>
<div> <process> A </process></div> <div> <process> B</process></div> <div> </split></div> <div> </fist></div> <div> <rest> </div> <div> <sequene></div> <div> <process> C </process></div> <div> <process> D </process></div> <div> </sequene></div>
<div> <rest></div> <div> </div> <div>There are two scenarios may occur:<BR>1. A and B do not return any information to E, <BR>2. A and B return some information to E at any time.<BR>What is the temporal relationship between A, B, C and D? </div> <div> </div> <div>I think that:</div> <div> </div> <div>If A and B do not return any information to E, then A, B, C, and D are executed in parallel. If A and B return some information to E, suppose the outputs of A is the part of inputs of C and the outputs of B is the part of inputs of D, then <BR>A, B, C, and D are executed in parallel with some constraints (A is before C, B is before D, and C is before D) such that the temporal relationship may be (ABCD), (BACD), and (ACBD). </div> <div> </div> <div>Please send me comments and discuss with me.Thanks.</div> <div> </div> <div>Best regards.<BR> <BR>Lihui Lei</div><p>
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Received on Tuesday, 16 May 2006 13:39:06 UTC