The bag semantics of ontology-based data access

Ontology-based data access (OBDA) is a popular approach for integrating and querying multiple data sources by means of a shared ontology. The ontology is linked to the sources using mappings, which assign views over the data to ontology predicates. Motivated by the need for OBDA systems supporting d...

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Bibliographic Details
Main Authors: Nikolaou, C, Kostylev, E, Konstantinidis, G, Kaminski, M, Grau, B, Horrocks, I
Format: Journal article
Published: 2017