Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Source Unified Modeling Language 2.5.1 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes UML keywords Region StateMachine composite State Vertex Transition Previous snippet A Region is a top-level part of a StateMachine or a composite State, that serves as a container for the Vertices and Transitions of the StateMachine. Full quote A StateMachine or composite State may contain multiple Regions representing behaviors that may occur in parallel. Next snippet Related snippets Related snippets (backlinks) In general, a StateMachine can have multiple Regions, each of which may contain States of its own, some of which may be composites with their own multiple Regions, etc. Consequently, a particular “state” of an executing StateMachine instance is represented by one or more hierarchies of States, starting with the topmost Regions of the StateMachine and down through the composition hierarchy to the simple, or leaf, States. Similarly, we can talk about such a hierarchy of substates within a composite State. This complex hierarchy of States is referred to as a state configuration (of a State or a StateMachine). For example, one valid state configuration for an execution of the StateMachine depicted in Figure 14.9 is: <CourseAttempt - Studying – (Studying::Lab2, Studying::TermProject, Studying::FinalTest)>. An executing StateMachine instance can only be in exactly one state configuration at a time, which is referred to as its active state configuration. StateMachine execution is represented by transitions from one active state configuration to another in response to Event occurrences that match the Triggers of the StateMachine. A State is said to be active if it is part of the active state configuration. Visit also Visit also (backlinks) Flags
