Foundations of ontology-based data access under bag semantics
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 to ontology predicates views over the data. The conventional semantics of OBDA is set-based—tha...
Main Authors: | Nikolaou, C, Kostylev, E, Konstantinidis, G, Kaminski, M, Cuenca Grau, B, Horrocks, I |
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Format: | Journal article |
Published: |
Elsevier
2019
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