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  1. OMG Issue

UML25 — UML2.5 issue : missing constraints on aggregation / composition

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  • Key: UML25-477
  • Legacy Issue Number: 18228
  • Status: closed  
  • Source: Model Driven Solutions ( Mr. Steve Cook)
  • Summary:

    As far as I know, a Property may only be marked as an aggregation or composition if either (a) it is not an association end or (b) it is the end of a binary association and the other end is not marked as an aggregation or composition. The spec does not actually say this clearly, and there is no OCL to enforce it.
  • Reported: UML 2.5b1 — Thu, 25 Oct 2012 04:00 GMT
  • Disposition: Resolved — UML 2.5
  • Disposition Summary:

    The text for Association says “A binary Association may represent a composite aggregation. . . ”. It doesn’t
    explicitly exclude the undesirable configurations.
  • Updated: Fri, 6 Mar 2015 20:59 GMT