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  1. OMG Issue

UML22 — UML 2 Issue: definition of navigability

  • Key: UML22-501
  • Legacy Issue Number: 6460
  • Status: closed  
  • Source: Simula Research Laboratory ( Bran Selic)
  • Summary:

    There is no definition for navigability or navigation in the Spec. Other
    concepts of similar importance, such as visibility, multiplicity, etc., are
    defined in the Spec, so it is not clear why it should be assumed that this
    concept does not require a definition.

    Add definition in Section 4 (Terms and definitions): The navigability of a
    binary association specifies the ability of an instance of the source
    classifier to access the instances of the target classifier by means of the
    association instances (links) that connect them. Navigability is closely
    related to the possibility of sending messages through associations (a
    message cannot be sent through an association instance against its
    navigability, that is, navigability is required for sending messages through
    associations), but they remain nonetheless different concepts.

  • Reported: UML 1.5 — Fri, 7 Nov 2003 05:00 GMT
  • Disposition: Resolved — UML 2.1.2
  • Disposition Summary:

    Discussion: This issue was resolved in UML 2.1 where an explanation of navigability was provided (see page 41 top in formal/07-02/05) Revised Text: N/A Disposition: Closed, no change

  • Updated: Fri, 6 Mar 2015 20:58 GMT