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  1. OMG Issue

SYSML16 — Incorrect statement about UML n-aries

  • Key: SYSML16-69
  • Legacy Issue Number: 16093
  • Status: closed  
  • Source: NIST ( Mr. Conrad Bock)
  • Summary:

    Section (UML Diagram Elements
    not Included in SysML Block Definition
    Diagrams) says "N-ary associations,
    shown in UML by a large open diamond
    with multiple branches, can be modeled
    by an intermediate block with no loss in
    expressive power." An intermediate
    block cannot capture multiplicities that
    would be on an the ends of an n-ary
    association. These multiplicities are
    for the links from end to end, rather
    than from intermediate object to end, as
    they would be with an intermediate
    object. However, intermediate blocks
    can specify the number of links each end
    might participate in for any of the
    other n-1 ends, which is not possible
    with n-ary associations. The
    expressiveness of n-aries and
    intermediate blocks is overlapping,
    rather than equivalent.

  • Reported: SysML 1.2 — Tue, 22 Mar 2011 04:00 GMT
  • Disposition: Duplicate or Merged — SysML 1.6
  • Disposition Summary:

    Incorrect statements about N-ary associations removed

    The incorrect statements are removed by the resolution of issue SYSML16-299.

  • Updated: Mon, 1 Apr 2019 18:17 GMT