composite structure diagram & interactions

[tinlans]

Refer to page 511 (Figure 14.22) & page 514 (Figure 14.25) in UML superstructure specification 2.2.

The 2 examples shows that interactions can be put into a class in composite structure diagrams.
EA didn't provide a way to add a compartment to a class which contains interactions.
Although we can add sub-diagrams for a class, this feature is still not visualizable in a diagram.

It's really important when we want to see what interactions are refered by a given class quickly, especially when we are reading a hard-copy.
Perhaps EA can add a functionality for adding compartments to a class in composite structure diagrams, and then allows users to drag interaction diagrams(sequence, communication, and timinig diagrams) to there.

Thanks.

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For convenience, I put the two figures here: