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arXiv · 1304.5810

Exchanging OWL 2 QL Knowledge Bases

Marcelo Arenas·Elena Botoeva·Diego Calvanese·Vladislav Ryzhikov
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Abstract

Knowledge base exchange is an important problem in the area of data exchange and knowledge representation, where one is interested in exchanging information between a source and a target knowledge base connected through a mapping. In this paper, we study this fundamental problem for knowledge bases and mappings expressed in OWL 2 QL, the profile of OWL 2 based on the description logic DL-Lite_R. More specifically, we consider the problem of computing universal solutions, identified as one of the most desirable translations to be materialized, and the problem of computing UCQ-representations, which optimally capture in a target TBox the information that can be extracted from a source TBox and a mapping by means of unions of conjunctive queries. For the former we provide a novel automata-theoretic technique, and complexity results that range from NP to EXPTIME, while for the latter we show NLOGSPACE-completeness.

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Marcelo Arenas, Elena Botoeva, Diego Calvanese, Vladislav Ryzhikov. 2013-04-21. Exchanging OWL 2 QL Knowledge Bases. https://arxiv.org/abs/1304.5810

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