On Equality-Generating Dependencies in Ontology Querying - Preliminary Report

Andrea Calì, Andreas Pieris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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 dependencies (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.
Original languageEnglish
Title of host publicationProceedings of the 5th Alberto Mendelzon International Workshop on Foundations of Data Management, Santiago, Chile, May 9-12, 2011
PublisherCEUR Workshop Proceedings (CEUR-WS.org)
Number of pages12
Publication statusPublished - 2011

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