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Subject: Re: [wsbpel] Issue - 249 - Can multi-start with correlations useimplicit correlation?


Title: Re: [wsbpel] Issue - 249 - Can multi-start with correlations use implicit correlation?
In today's call, I said that I would look into this issue.  The results of my research are below.

The current draft of the spec (1.157) has the text from Dieter's note (extracted below) already in it at lines 3491-4.  It appears that this issue is already edited into the spec.  In addition,
SA00059 in the draft appendix already refers the the "new" language.   I have no recollection of whether we actually voted on it.

Danny

"If a process has multiple start activities with correlation sets then all such activities MUST share at least one common
correlationSet and all common correlationSets defined on all the activities MUST have the value of the initiate attribute be set to "join" (see section 9. Correlation). "

Dieter Koenig1 wrote:

+1 (the example must not be rejected). The current wording for start
activities which requires that "all such activities MUST share at least one
common correlationSet" needs to be aligned with the fact that correlation
sets are always optional.

In addition, when (portable) WS-BPEL correlation sets are used concurrently
with other (non-portable) correlation mechanisms then an explicit statement
should be made that in case of conflicts WS-BPEL correlation sets take
precedence over other correlation mechanisms. With that, the statement
should be modified in the following way:
If a process has multiple start activities with correlation sets then all
such activities MUST share at least one common correlationSet and all
common correlationSets defined on all the activities MUST have the value of
the initiate attribute be set to "join".

Kind Regards
DK
                                                                                                                        
 Dieter König                                Mail: dieterkoenig@de.ibm.com         IBM Deutschland Entwicklung GmbH     
                                                                                                                        
 Senior Technical Staff Member               Tel (office): (+49) 7031-16-3426      Schönaicher Strasse 220              
                                                                                                                        
 Architect, Business Process Choreographer   Fax (office): (+49) 7031-16-4890      71032 Böblingen                      
                                                                                                                        
 Member, Technical Expert Council            Tel (home office): (+49) 7032-201464  Germany                              
                                                                                                                        





                                                                          
             ws-bpel issues                                               
             list editor                                                  
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             oreology.com>             wsbpel@lists.oasis-open.org        
                                                                        cc
             21.03.2006 21:47                                             
                                                                   Subject
                                       [wsbpel] Issue - 249 - Can         
             Please respond to         multi-start with correlations use  
             wsbpel@lists.oasi         implicit correlation?              
                s-open.org                                                
                                                                          
                                                                          
                                                                          
                                                                          
                                                                          




This issue has been added to the wsbpel issue list with a status of
"received". The status will be changed to "open" if a motion to open the
issue is proposed and that motion is approved by the TC. A motion could
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will remain as "received".


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Issue - 249 - Can multi-start with correlations use implicit correlation?


Status: received
Date added: 21 Mar 2006
Categories: correlation
Date submitted: 21 March 2006
Submitter: Danny van der Rijn
Description: Currently: If more than one start activity is enabled
concurrently, then all such activities MUST share at least one common
correlationSet (see Correlation and the Multiple Start Activities example).


If a process contains exactly one start activity then the use of
correlationSets is unconstrained.


Scenario:

<flow>
    <receive createInstance="yes"/>
    <receive createInstance="yes"/>
</flow>



This is legal, and uses implicit correlation. Adding unrelated correlations
to it:

<flow>
    <receive createInstance="yes">
       <correlation set ="foo" initiate="yes"/>
    </receive>





    <receive createInstance="yes">
       <correlation set ="bar" initiate="yes"/>
    </receive>
</flow>



Is illegal according to the current text. IMO this is inconsistent with our
previous resolutions.
Changes: 21 Mar 2006 - new issue



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