Local transitions cannot be represented in UML and xtUML

[abelhegedus]

Local transitions are defined as follows:

• source and target state is the same
• does not trigger exit and entry actions

There is no specific representation in UML or XTUMLRT-Common.

• Will the xtUML profile contain a stereotype to be put on such transitions?
• Will this appear in the xtUMLrt or common metamodels?

[gbatori1]

Local transitions have special properties in UML (not a suprise it is called Local) so no special stereotype needed. It should appear in the Common metamodel.

[abelhegedus]

For future reference:

• Transitions in UML have a kind attribute, that can be external (default), local or internal.
• Currently the UML integration does not take the kind attribute into account.

Remaining question:

• Should the Common metamodel also include all three kinds?
• Should we handle these transitions as the UML standard prescribes or define a more restricted semantics for flat statemachines?