How to depict nested action/activities in a UML Activity Diagram?

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Robbo

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Mar 8, 2016, 11:18:42 PM3/8/16

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Hi All,

I would like to create an activity diagram in which one of the actions is depicted with its sub-actions. To better clarify I would like to be able to depict something like the following diagram

The problem in my case is that SubActivity1 does not have any input parameter. I just want SubActivity1 to start its execution when OpaqueAction1 is completed.

I know that it is possible to use a CallBehaviorAction to express that an Action will result in the execution of another Activity like in the following diagram

but in this way I cannot depict the sub-actions in the same activity diagram.

I also thought of using a StructuredActivityNode like in the following diagram

here the problem is that I am not able to show the name of the StructuredActivityNode. I do not know whether this is an issue of the tool that I am using (Papyrus) or it is a general issue.