UML 2.4.1 now released

When UML 2.4 was released we discovered an issue that meant it was impossible to interchange StructuredActivityNodes reliably. StructuredActivityNodes are executable nodes in an activity diagram that are also groups.  UML 2.4 doesn’t specify clearly whether they should be serialized as nodes or as groups; as a consequence, different tools do different things.  In UML…

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