G. Meditskos, N. Bassiliades, “Towards an Object-Oriented Reasoning System for OWL”, Int. Workshop on OWL Experiences and Directions, B. Cuenca Grau, I. Horrocks, B. Parsia, P. Patel-Schneider (Ed.), 11-12 Nov. 2005, Galway, Ireland, 2005.

Author(s): G. Meditskos, Nick Bassiliades

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Appeared In: Int. Workshop on OWL Experiences and Directions, B. Cuenca Grau, I. Horrocks, B. Parsia, P. Patel-Schneider (Ed.), 11-12 Nov. 2005, Galway, Ireland, 2005.

Keywords: Ontologies, OWL, Object Model, CLIPS, Descriptive Semantics, Production Rules, Deductive Rules.

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Abstract: In this paper we present O-DEVICE, a deductive object-oriented knowledge base system for reasoning over OWL documents. O-DEVICE imports OWL documents into the CLIPS production rule system by transforming OWL ontologies into an object-oriented schema of the CLIPS Object-Oriented Language (COOL) and instances of OWL classes into COOL objects. The pur-pose of this transformation is to be able to use a deductive object-oriented rule language for reasoning about OWL data. The O-DEVICE data model for OWL ontologies maps classes to classes, resources to objects, property types to class slot (or attribute) definitions and encapsulates resource properties inside re-source objects, as traditional OO attributes (or slots). In this way, when access-ing properties of a single resource, few joins are required. O-DEVICE is an ex-tension of a previous system, called R-DEVICE, which effectively maps RDF Schema and data into COOL objects and then reasons over RDF data using a deductive object-oriented rule language.