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    A general datalog-based framework for tractable query answering over ontologies

    Calì, Andrea and Gottlob, G. and Lukasiewicz, T. (2009) A general datalog-based framework for tractable query answering over ontologies. In: Paredaens, J. and Su, J. (eds.) Proceedings of the twenty-eighth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems - PODS '09. New York, U.S.: ACM Publications, pp. 77-86. ISBN 9781605585536.

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    In this paper, we introduce a family of expressive extensions of Datalog, called Datalog+/-, as a new paradigm for query answering over ontologies. The Datalog+/- family admits existentially quantified variables in rule heads, and has suitable restrictions to ensure highly efficient ontology querying. We show in particular that Datalog+/- generalizes the DL-Lite family of tractable description logics, which are the most common tractable ontology languages in the context of the Semantic Web and databases. We also show how stratified negation can be added to Datalog+/- while keeping ontology querying tractable. Furthermore, the Datalog+/- family is of interest in its own right and can, moreover, be used in various contexts such as data integration and data exchange.


    Item Type: Book Section
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Computing and Mathematical Sciences
    Research Centres and Institutes: Birkbeck Knowledge Lab
    Depositing User: Administrator
    Date Deposited: 14 May 2013 10:15
    Last Modified: 09 Aug 2023 12:33


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