What is This Thing Called Aggregation?

  • Authors:
  • B. Henderson-Sellers;F. Barbier

  • Affiliations:
  • -;-

  • Venue:
  • TOOLS '99 Proceedings of the Technology of Object-Oriented Languages and Systems
  • Year:
  • 1999

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Abstract

An in-depth analysis of the semantics of aggregation in object modelling leads to the identification of the primary axioms of whole-part; irreflexivity at the instance level; antisymmetry at both instance and type level; and in which the aggregate object has one or more emergent and resultant properties. Other aspects of aggregation are either a natural consequence of these axioms or else are secondary. Each secondary characteristic defines a partition and thus gives the modelled aggregation relationship a specific "flavour".