What is this thing called aggregation?
- 20 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
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. We show that many of the existing definitions of aggregation in object modelling are ill-considered.Keywords
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