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Virtual OBDA over Expressive Ontologies: Rewritings and Approximations
(CEUR Electronic Workshop Proceedings, 2016)
In this paper we extend virtual OBDA to more expressive ontology languages than that of DL-Lite_R, which is the logic underpinning the W3C ontology language OWL 2 QL. We achieve this by relying on two well-known mechanisms, ...
Beyond OWL 2 QL in OBDA: Rewritings and approximations
Ontology-based data access (OBDA) is a novel paradigm facilitating access to relational data, realized by linking data sources to an ontology by means of declarative mappings. DL-LiteR, which is the logic underpinning the ...