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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Explaining Inconsistencies in OWL Ontologies
verfasst von : Matthew Horridge, Bijan Parsia, Ulrike Sattler
Erschienen in: Scalable Uncertainty Management
Verlag: Springer Berlin Heidelberg
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Justifications play a central role as the basis for explaining entailments in OWL ontologies. While techniques for computing justifications for entailments in consistent ontologies are theoretically and practically well-understood, little is known about the practicalities of computing justifications for inconsistent ontologies. This is despite the fact that justifications are important for repairing inconsistent ontologies, and can be used as a basis for paraconsistent reasoning. This paper presents algorithms, optimisations, and experiments in this area. Surprisingly, it turns out that justifications for inconsistent ontologies are more “difficult” to compute and are often more “numerous” than justifications for entailments in consistent ontologies: whereas it is always possible to compute
some
justifications, it is often not possible to compute
all
justifications for real world inconsistent ontologies.