Concept and role forgetting in ALC Ontologies

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Title Concept and role forgetting in ALC Ontologies
Author Wang, Kewen; Wang, Jack; Topor, Rodney William; Pan, Jeff Z.; Antoniou, Grigoris
Publication Title The Semantic Web - ISWC 2009
Editor A. Bernstein, D. R. Karger, T. Heath, L. Feigenbaum, D. Maynard, E. Motta, K. Thirunarayan
Year Published 2009
Place of publication Berlin
Publisher Springer
Abstract Forgetting is a useful tool for tailoring ontologies by reducing the number of concepts and roles, while preserving sound and complete reasoning. Some attempts have been made to address the problem of forgetting in some relatively simple description logics (DLs) such as DL-Lite and extended EL . Ontologies in those works are mostly expressed as TBoxes rather than general knowledge bases (KBs). However, the issue of forgetting for general KBs in more expressive ontology languages, such as ALC and OWL DL, is largely unexplored. In particular, the problem of characterizing and computing forgetting is still open. In this paper, we first define semantic forgetting about concepts and roles in ALC ontologies and show several important properties of forgetting in this setting. Unlike the case of DL-Lite, the result of forgetting in an ALC ontology may not exist in general, which makes the problem of how to compute forgetting in ALC more challenging. As a result, we tackle the non-existence of the result of forgetting in ALC ontologies by first investigating forgetting in concept descriptions and then defining and studying a series of approximations to the result of forgetting in ALC ontologies. We show that forgetting in ALC ontologies can be approximated through computing forgetting for concept descriptions. Our algorithms can be embedded into an ontology editor to enhance its ability to manage and apply (large) ontologies.
Peer Reviewed Yes
Published Yes
Publisher URI
Copyright Statement Copyright 2009 SWSA. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the conference website for access to the definitive, published version.
ISBN 978-3-642-04929-3
Conference name 8th International Semantic Web Conference (ISWC 2009)
Location Chantilly, VA, USA
Date From 2009-10-25
Date To 2009-10-29
Date Accessioned 2010-03-01
Language en_AU
Research Centre Institute for Integrated and Intelligent Systems
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Other Artificial Intelligence
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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