[OASIS Issue Tracker] (EBXMLMSG-21) @mpc attribute on UserMessage needs editorial fix and clarification

[ https://issues.oasis-open.org/browse/EBXMLMSG-21?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sander Fieten updated EBXMLMSG-21:
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    Component/s:     (was: AS4 Profile)

> @mpc attribute on UserMessage  needs editorial fix and clarification
> --------------------------------------------------------------------
>
>                 Key: EBXMLMSG-21
>                 URL: https://issues.oasis-open.org/browse/EBXMLMSG-21
>             Project: OASIS ebXML Messaging Services TC
>          Issue Type: Bug
>          Components: Core Spec
>            Reporter: Dale Moberg
>            Priority: Minor
>
> ebMS 3 Core Spec section 5.2.2 has a section on the @mpc attribute of eb:Messaging/eb:UserMessage. 
> eb:Messaging/eb:UserMessage/@mpc: This OPTIONAL attribute contains a URI that
> identifies the Message Partition Channel to which the message is assigned. The absence of this
> element indicates the use of the default MPC. When the message is pulled, the value of this
> attribute MUST indicate the MPC requested in the PullRequest message.
> What is meant is conjectured to be that:
> Unless the UserMessage is in response to a Pull request, the attribute is not used. When the UserMessage is in response
> to a PullRequest and the @mpc attribute is absent, then the message reflects the use of the default MPC. But when the PullRequest
> signal used a specific value for the MPC, then the UserMessage must have the @mpc attribute, and the value of that attribute must equal 
> the MPC URI value that was requested in the PullRequest signal. 
> The remark about "OPTIONAL" should be deleted as it is only a schema technicality, and is partly responsible for some confusion. 
> The confusion is interpreting that the @mpc attribute can be omitted when the PullRequest has used a specific value in its @mpc attribute.



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