KDM — Section: 9

This is another occurence of "backward navigation" references in the KDM Core. KDM requires navigable associations from KDMEntity to KDMGroup (in the Core KDM this association is named group, see Figure 9.1). While useful for certain type of cross-referencing queries (e.g. to which groups does the given entity belong), these associations make KDM instance XMI extremely inflexible and hard to modify (as information abut relations is essentially duplicated). Also, as this element is subsetted by various groups, children of KDMEntity get funny collections of such associations (e.g. UIGroup, CodeGroup associations, etc). It is better to eliminate all these associations, and leave only the association from the KDMGroup to the KDMEntity element. The group association can be changed into an operation, and implemented internally by particular KDM tools.

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