a predefined guard “else” (represented as an Expression with “else” as its operator and no operands) may be used for at most one outgoing edge. This guard evaluates to true only if the token is not accepted by any other outgoing edge from the DecisionNode Source Unified Modeling Language 2.5.1
uml101 - Activity Diagram - notation - REFERENCE CARD This content has been marked as discussing an ADVANCED topic! Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 01:04: UML Behavior: Activities quick start Slide kind UML Activity Diagram
uml101 - StateMachines - NOTATION REFERENCE CARD Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 01:03: UML Behavior: StateMachines quick start Slide kind UML StateMachine Diagram
The Controller Activity (classifierBehavior of the Controller class) Gallery Tutorial HOWTO simulate UML-2.5.1 'Figure 14.7 Composite State with two States' in Cameo Simulation Toolkit - Operation-driven Transition case study Section Slide kind UML Activity Diagram
choice – ... If none of the guards evaluates to true, then the model is considered ill formed. To avoid this, it is recommended to define one outgoing Transition with the predefined “else” guard for every choice Pseudostate. Source Unified Modeling Language 2.5.1
(As a way of avoiding this situation in some cases, it is possible to associate a predefined guard denoted as “else” with at most one outgoing Transition. This Transition is enabled if all the guards attached to the other Transitions evaluate to false). Source Unified Modeling Language 2.5.1
