In UML modeling, a guard
condition is a boolean condition that is evaluated when a transition
initiates. A transition with a guard condition occurs when the guard
condition is evaluated to be true.
Before you begin
Before you can add a trigger to
a transition, you must have a state machine diagram open in the
Modeling perspective.
About this task
To add a guard condition to a transition:
Procedure
- Right-click a transition; then click .
- In the parentheses beside the transition name, describe
the guard condition and press Enter.