UML22 — UML2: Missing ActionOutputPin

UML2 Activities support two different approaches for exchanging data between actions: "push semantics" of token passing over ObjectFlows and "pull semantics" of typical programming languages using ActionInputPins or ValuePin. The fromAction of an ActionInputPin could be a ValueExpression that references a Variable of the Activity or StructuralFeature of the context Classifier. However, support for pull semantics is incomplete. The first issues is 9247 where there is no ReadParameterAction or WriteParameterAction to support pull semantics for Activity Parameters. These Actions should be provided so that ActivityParameterNodes are only needed for ObjectFlows allowing the Activity Parameters to be directly referenced for pull semantics. This would also allow Parameters, Variables and StructuralFeatures to be all handled the same way.

Despite the misleading title, this issue appears to be essentially a duplicate of issues 9247 and 8470. It looks like the text in this issue was just introductory to that of issue 12162, and was incorrectly made an issue of its own.
Revised Text:
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Disposition: Duplicate