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 Snippet kind INFO UML keywords State StateMachine Transition Transition::guard Constraint Event Event occurrence Previous snippet Transition::guard : Constraint [0..1] ... A guard is a Constraint that provides a fine-grained control over the firing of the Transition. The guard is evaluated when an Event occurrence is dispatched by the StateMachine. ... Full quote guard : Constraint [0..1]{subsets Namespace::ownedRule} (opposite A_guard_transition::transition) ... If the guard is true at that time, the Transition may be enabled, otherwise, it is disabled. Guards should be pure expressions without side effects. Guard expressions with side effects are ill formed. Next snippet Related snippets A Transition represents an arc between exactly one source Vertex and exactly one Target vertex (the source and targets may be the same Vertex). It may form part of a compound transition, which takes the StateMachine from one steady State configuration... Transition::guard : Constraint [0..1] ... A guard is a Constraint that provides a fine-grained control over the firing of the Transition. The guard is evaluated when an Event occurrence is dispatched by the StateMachine. ... Related snippets (backlinks) Visit also Visit also (backlinks) Flags
