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Subject: Issue - 118 - When are Correlation Sets Mandatory?
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Normative Change - The schemas for pick and receive make correlation sets optional. That would appear to be wrong.
Also, I'm unclear about what assumptions we make regarding invoke, specifically, is there a requirement to have a correlation set defined on pattern="in" on an invoke? This is kind of a tricky issue. If a synchronous transport is being used then there may not be any explicit information available to mark the response for correlation purposes. In that case do we allow the correlation set for the response to be left off or do we require programmers to use issue 96 : Engine-managed correlation sets ?
Also note, that the WSDL 1.1 spec quite clearly states that
request/responses do not have to be sent over synchronous transports so
there may be values we could use for correlation sets. In other words,
the situation is inconsistent. In some cases a request/response uses a
synchronous transport and in other cases it could be using an
asynchronous transport with some message based correlation. Do we want
to distinguish these cases or do we want to just say that we presume
that any time a request/response pattern is used there is some
correlation mechanism implicitly known to the engine and therefore
correlation sets are always optional on the incoming message? Reply has
the same issue as responses on invokes.
Changes: 15 Apr 2004 - new issue
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