UML 2.2 RTF Avatar
  1. OMG Issue

UML22 — UML 2 Super/Metamodel/redefinition and substitutability

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  • Key: UML22-10
  • Legacy Issue Number: 6200
  • Status: closed  
  • Source: Simula Research Laboratory ( Dr. Bran Selic)
  • Summary:

    Redefinition, as used in UML2, sometimes violates superclass substituitability rules. For example, redefining multiplicity from many to 1 breaks some OCL constraints. For example, Statemachines changed a multiplicity from many to 1. Statemachines redefines association to OwnedBehaviors to OwnedStateMachines which does not allow other types of owned behaviors.

  • Reported: UML 1.5 — Sun, 7 Sep 2003 04:00 GMT
  • Disposition: Resolved — UML 2.2
  • Disposition Summary:

    Discussion
    The specific issue with state machines no longer applies, having been resolved in an earlier RTF. The general
    issue about redefinition is a complaint about a fundamental characteristic of UML semantics which are by
    now quite well understood. Changing these semantics would be very fundamental and disruptive.
    This also resolves issue 14929.
    Disposition: Closed - No Change
  • Updated: Fri, 6 Mar 2015 20:58 GMT