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  1. OMG Issue

XMI12 — XMI 1.2 Issue - Association elements with references

  • Key: XMI12-11
  • Legacy Issue Number: 5305
  • Status: open  
  • Source: 88solutions ( Pete Rivett)
  • Summary:

    There are several problems related to the specification of Association
    elements (representing Links).

    1) At the moment Association elements are only generated in DTDs/Schemas for
    referenceless associations.
    This precludes the use of Association instances in XMI files to link
    existing/external objects: a technique I have certainly found useful even
    when those objects do have references. There seems to be little reason for
    not generating the Association elements.

    2) The description of DTD design principles in 3.6.6 refers to association
    roles. Presuming this is intended to mean association ends, the text is not
    accurate since the element name generated is based on the reference name for
    the class which may differ from the association end name.

    3) Section 3.6 does not mention the creation of Association elements even
    for the existing referenceless Association case.

    4) The DTD and document generation rules for Association elements are
    unnecessarily heavyweight and inconsistent with the treatment of references
    on classes. For example it does not make sense for an AssociationEnd element
    to have the fixed xmi attributes; and it should be possible to dispense with
    them completely: letting an Association element refer to the linked elements
    using XML attributes. e.g. for association A with ends b and c, a link could
    be represented as follows (b1 and c1 are xmi.id's): <A b=b1 c=c1 />).

  • Reported: XMI 1.1 — Fri, 17 May 2002 04:00 GMT
  • Updated: Wed, 11 Mar 2015 11:15 GMT