Constraint Patterns for Tractable Ontology-Mediated Queries with Datatypes

    Description Logics, 2016.

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    EI

    Abstract:

    © 2016, CEUR-WS. All rights reserved. Adding datatypes to ontology-mediated conjunctive queries (OMQs) often makes query answering hard. This applies, in particular, to datatypes with non-unary predicates. In this paper we propose a new, non-uniform way, of analysing the data-complexity of OMQ answering with datatypes containing higher-ar...More

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