Adding change triggers to transitions

In UML modeling, a change trigger is an event that represents a condition. The condition is defined by a boolean-valued expression that triggers a transition when its value changes from false to true.

Before you can add a trigger to a transition, you must have a state machine diagram open in the Modeling perspective.
To add a change trigger to a transition:
  1. Right-click a transition; then click Add UML > Change Trigger.
  2. Type a name and press Enter.

Parent topic: Adding triggers to transitions

Related concepts
States, regions, and transitions

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