UML Diagrams Zicomi Systems publishes some UML example diagrams online from the world famous UML dictionary. more...
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Transition
A transition is an element relating two vertices in a state machine that represents the movement of an instance in the source state changing or "transitioning" into the instance in the second state. The transition takes place when an event occurs and the guard condition evaluates to TRUE
Explanation
Events occur either internal or external to the entity being modeled. The occurrence of these events can trigger a transition to fire, changing the entity from one state to another.