Pseudostates - junction

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Tutorial
TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo
Section
01:03: UML Behavior: StateMachines quick start
Topic level
ESSENTIAL
UML keywords
StateMachine
StateMachine Diagram
State
Transition
Vertex
PseudostateKind
PseudostateKind::junction
Keywords
Slide kind
UML StateMachine Diagram
NOTATION REFERENCE ONLY: This diagram is not meant to be executable!
The absence of explicit triggers or guards on Transition symbols in this diagram is for brevity only and does not imply completion Transitions with implicit triggers.
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Pseudostates - choice
Notes
Snippets (quotes/extracts)
  [UML-2.5.1] junction – This type of Pseudostate is used to connect multiple Transitions into compound paths between States.
  [UML-2.5.1] For example, a junction Pseudostate can be used to merge multiple incoming Transitions into a single outgoing Transition representing a shared continuation path.
  [UML-2.5.1] junction – ...It may happen that, for a particular compound transition, the configuration of Transition paths and guard values is such that the compound transition is prevented from reaching a valid state configuration. In those cases, the entire ...
  [UML-2.5.1] junction – ... If more than one guard evaluates to true, one of these is chosen. The algorithm for making this selection is not defined.
  [UML-2.5.1] NOTE. Such guard Constraints are evaluated before any compound transition containing this Pseudostate is executed, which is why this is referred to as a static conditional branch.
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