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    On equality-generating dependencies in ontology querying - preliminary report

    Calì, Andrea and Pieris, A. (2011) On equality-generating dependencies in ontology querying - preliminary report. In: Barcelo, P. and Tannen, V. (eds.) Proceedings of the 5th Alberto Mendelzon International Workshop on Foundations of Data Management, Santiago, Chile, May 9-12, 2011. CEUR Workshop Proceedings 749. CEUR Workshop Proceedings.

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    In ontology-based data access, data are queried through an ontology that offers a representation of the domain of interest. In this context, correct answers are those entailed by the logical theory constituted by the data and the ontology. Traditional database constraints like tuple-generating dependencies (TGDs) and equality-generating de- pendencies (EGDs) are a useful tool for ontology specification. However, their interaction usually leads to intractability or undecidability of query answering; separability is the notion that captures the lack of interaction between TGDs and EGDs. In this paper we exhibit a novel and general sufficient condition for separability, in the case where the ontology is expressed with inclusion dependencies (a subclass of TGDs) and EGDs.


    Item Type: Book Section
    Additional Information: Series ISSN: 1613-0073
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Computing and Mathematical Sciences
    Research Centres and Institutes: Birkbeck Knowledge Lab
    Depositing User: Sarah Hall
    Date Deposited: 26 Apr 2013 14:34
    Last Modified: 09 Aug 2023 12:32


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