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    Query inseparability for description logic knowledge bases

    Botoeva, E. and Kontchakov, Roman and Ryzhikov, V. and Wolter, F. and Zakharyaschev, Michael (2014) Query inseparability for description logic knowledge bases. In: Baral, C. and De Giacomo, G. and Eiter, T. (eds.) Proceedings, Fourteenth International Conference on Principles of Knowledge Representation and Reasoning (KR-14). California, U.S.: AAAI Press. ISBN 9781577356578.

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    Abstract

    We investigate conjunctive query inseparability of description logic (DL) knowledge bases (KBs) with respect to a given signature, a fundamental problem for KB versioning, module extraction, forgetting and knowledge exchange. We study the data and combined complexity of deciding KB query inseparability for fragments of Horn-ALCHI, including the DLs underpinning OWL 2 QL and OWL 2 EL. While all of these DLs are P-complete for data complexity, the combined complexity ranges from P to ExpTime and 2ExpTime. We also resolve two major open problems for OWL2QL by showing that TBox query inseparability and the membership problem for universal UCQ-solutions in knowledge exchange are both ExpTime-complete for combined complexity.

    Metadata

    Item Type: Book Section
    Additional Information: 14th International Conference on Principles of Knowledge Representation and Reasoning - Vienna University of Technology, Gußhausstraße 29, Austria. July 20-24, 2014.
    School: Birkbeck Schools and Departments > School of Business, Economics & Informatics > Computer Science and Information Systems
    Depositing User: Roman Kontchakov
    Date Deposited: 11 Aug 2014 08:22
    Last Modified: 16 Aug 2019 04:46
    URI: http://eprints.bbk.ac.uk/id/eprint/10354

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