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Castor: a Constraint-based SPARQL Engine with Active Filter Processing

TitleCastor: a Constraint-based SPARQL Engine with Active Filter Processing
Publication TypeConference Paper
Year of Publication2012
Authorsle Clément, Vianney, Deville Yves, Solnon Christine, and Champin Pierre-Antoine
Conference Name9th Extended Semantic Web Conference (ESWC 2012)
PublisherSpringer
Conference LocationHeraklion, Crete, GR
Abstract

Efficient evaluation of complex SPARQL queries is still an open research problem. State-of-the-art engines are based on relational database technologies. We approach the problem from the perspective of Constraint Programming (CP), a technology designed for solving NP-hard problems. Such technology allows us to exploit SPARQL filters early-on during the search instead of as a post-processing step. We propose Castor, a new SPARQL engine based on CP. Castor performs very competitively compared to state-of-the-art engines.

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