Editing Events

In UML, a state in a state diagram ican have events that are handled by actions within the state, without ever leaving the state. Those events and actions appear in a compartment under the state name compartment:

You can edit an event of a state within a diagram through the State Detail Page, or by selecting the event in the model tree. The Detail Page for an event contains additional controls shown here:

Event Type: Use thid dropdown list to select an event type. UML defines four standard types of state events:
- Entry: An event that happens whenever the system enters the state.
- Do: This event happens repeatedly as long as the system is in the state.
- Exit: An event that happens whenever the system leaves the state.
- Event: Any other sort of event that happens during the state.
Action: This describes some action taken by the system in response to the event.

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