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  1. OMG Specification

OMG System Modeling Language — Open Issues

  • Acronym: SysML
  • Issues Count: 2
  • Description: Issues not resolved
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Issues not resolved

Issues Descriptions

Clarify if the usage of qualified associations is allowed

  • Status: open  
  • Source: oose Innovative Informatik eG ( Tim Weilkiens)
  • Summary:

    It seems that the SysML specification wants to exclude the usage of qualified associations. However, it only says that it does not seem to be essential to use them:

    "Qualified associations, shown in SysML by an open box at the end of an association path with a property name inside, are a specialized feature of UML that specifies how a property value can represent an identifier of an associated target. This capability, while useful for data modeling, does not seem essential to accomplish any of the SysML requirements for
    support of systems engineering." (8.3.1.3, SysML 1.5)

    It is still unclear if qualified associations are allowed or not.

  • Reported: SysML 1.5b1 — Wed, 26 Apr 2017 07:35 GMT
  • Updated: Wed, 2 Aug 2017 00:51 GMT

Association arrowheads should not be forbidden

  • Status: open  
  • Source: oose Innovative Informatik eG ( Tim Weilkiens)
  • Summary:

    The SysML specification excludes the usage of association arrowheads:

    "The use of navigation arrowheads on an association has been simplified by excluding the case of arrowheads on both ends, and requiring that such an association always be shown without arrowheads on either end." (8.3.1.3, SysML 1.5).

    However, arrowheads are commonly used in SysML modeling. There are also examples of usages in the SysML specification itself, for example, figure D.15.

  • Reported: SysML 1.5b1 — Wed, 26 Apr 2017 07:31 GMT
  • Updated: Wed, 2 Aug 2017 00:51 GMT