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Unified Modeling Language Reference Manual, The, Second Edition by Grady Booch, Ivar Jacobson, James Rumbaugh

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state machine

A specification of the sequences of states that an object or an interaction goes through in response to events during its life, together with its responsive effects (action and activity). A state machine is attached to a source class, collaboration, or method and specifies the behavior of the instances of the source element.

See also action, activity, composite state, event, pseudostate, state, transition.

Semantics

A state machine is a graph of states and transitions that describes the response of an instance of a classifier to the receipt of events. State machines may be attached to classifiers, such as classes and use cases, as well as to collaborations and methods. The element that the state machine is attached to is called ...

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