UML22 — Section: Activities - Multiple activity parameters nodes for a single inout

Multiple activity parameters nodes for a single inout. Can there be multiple activity parameters nodes for a single inout parameter? If not, the node will have both incoming and outgoing edges, which violates constraint [3] of ActivityParameterNode.

There is nothing that prevents a single inout parameter having multiple activity parameter nodes, one with outgoing flows and one with incoming flows. Further, the semantics for activity parameter nodes deals with this case consistently. However, there are actually no limits on the number of activity parameter nodes for a parameter at all, without clear semantics for the general case.