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Commentary

Action-expression: action to be performed, e.g., operation calls that increment attribute values. Events may take arguments (entry, exit, do take no arguments). Triggerless transitions have no event between two states in the state diagram; state change occurring when the internal actions in a state is completed. When all the actions in a state are performed a transition without an external event will automatically be triggered. Action-expressions follow the ``/'' in state diagrams.



Ananda Amatya
11/3/1999