A UML diagram showing the life of an object in states and transitions.
State Machine Diagram
A condition during an object’s life when it satifies some criterion, performs some action, or waits for an event.
State of a state machine diagram
The movement of an object from one state to another state.
Transition of a state machine diagram
A description of activites performed as part of a transition.
Action Expression
A true/false test to see whether a transition can fire.
Guard Condition