Derived union

From Wikipedia, the free encyclopedia

This article is orphaned as few or no other articles link to it. Please help introduce links in articles on related topics. (July 2006)

The introduction to this article provides insufficient context for those unfamiliar with the subject. Please help improve the article with a good introductory style.

Derived union is a term from Unified Modeling Language which applies to some structural feature of some element and means that the feature is constructed (as a set union) from those features of derived elements which subset this feature. For example, associations general and specific of Generalization element subset associations target and source of DirectedRelationship. It means that if Generalization instance is asked, e.g. for target association, it returns an instance of general association.