• Brian Henderson-Sellers
Part of the SpringerBriefs in Computer Science book series (BRIEFSCOMPUTER)


Aßmann et al. (2006, p. 253), quoting Gruber (1993), state that an ontology is a formal specification of a shared conceptualisation. Since it is both an abstraction and a simplification of some reality (domain of interest), an ontology is also a model (e.g. Nirenburg 2004; Guizzardi 2005, p. 6; Aßmann et al. 2006, p. 256) but one that is descriptive, domain-relevant and static as opposed to a system-focussed model, which does not require any shared understanding nor does it model the whole of the domain (Fig. 5.1). It is widely stated that, while an ontology uses an open-world assumption, a model uses a closed-world assumption (e.g. Aßmann et al. 2006; Atkinson et al. 2006) although some ontologies are based on a closed-world assumption (e.g. Wang et al. 2006).
Fig. 5.1

Ontologies and system models can both be considered as kinds of models


Class Diagram Domain Ontology Reference Ontology Shared Conceptualisation Ontological Instance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© The Author(S) 2012

Authors and Affiliations

  • Brian Henderson-Sellers
    • 1
  1. 1.School of SoftwareUniversity of Technology, SydneySydneyAustralia

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