Internal transition dialog box

Internal transitions

An internal transition is a transition that is internal to a state. It is related to a state. It may be triggered upon entering or exiting the state, or can describe an activity that is performed whilst in the state.

The "Internal transition" dialog box contains four tabs - "Properties", "Notes", "Tagged values" and "Stereotypes". For information on these standard dialog box tabs, please see "Standard dialog box tabs".

The "Properties" tab of the "Internal transition" dialog box

The "Properties" tab of the "Internal transition" dialog box is used to define values for an internal transition.

The "Properties" screen of the "Internal transition" dialog box

Key:

· "Received event": This is the received event which triggers the internal transition.

· "Guard condition": This is the condition under which an internal transition is triggered.

· "Expression of the action": This is an action realized when the transition is triggered. The combobox makes it possible to simply designate an operation (message call).

· "Expression of the sent event": This is an event sent by the internal transition once it has been triggered.

· "Final condition": This is a condition obtained once the transition has occurred (this can be useful for protocol state diagrams).