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  1. OMG Issue

UML22 — UML 2 state machines / entry point outgoing transitions

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  • Key: UML22-274
  • Legacy Issue Number: 10147
  • Status: closed  
  • Source: Simula Research Laboratory ( Dr. Bran Selic)
  • Summary:

    In section 15.3.8 of the of the UML spec 06-04-02.pdf on page 563 it says:

    An entry point pseudostate is an entry point of a state machine or composite state. In each region of the state machine or composite state it has a single transition to a vertex within the same region.

    I believe that the intent was to say "at most a single transition", since it is possible that no transition exists as well as having multiple outgoing transitions (with guards) in each region.

  • Reported: UML 2.1 — Wed, 30 Aug 2006 04:00 GMT
  • Disposition: Resolved — UML 2.2
  • Disposition Summary:

    It is correct that entry points do not 'have' to have an outgoing transition. Updating the text is appropriate.
  • Updated: Fri, 6 Mar 2015 20:58 GMT