AAAI Publications, Thirteenth International Conference on the Principles of Knowledge Representation and Reasoning

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Conjunctive Query Answering with OWL 2 QL
Stanislav Kikot, Roman Kontchakov, Michael Zakharyaschev

Last modified: 2012-05-17


We present a novel rewriting technique for conjunctive query answering over OWL 2 QL ontologies. In general, the obtained rewritings are not necessarily correct and can be of exponential size in the length of the query. We argue, however, that in most, if not all, practical cases the rewritings are correct and of polynomial size. Moreover, we prove some sufficient conditions, imposed on queries and ontologies, that guarantee correctness and succinctness. We also support our claim by experimental results.


ontology-based data access; query rewriting; OWL 2 QL; DL-Lite

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