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dlvhex-sparql: A SPARQL-compliant query engine based on dlvhex

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dc.contributor.author Polleres, Axel en
dc.contributor.editor Polleres, Axel en
dc.date.accessioned 2009-12-15T12:02:49Z en
dc.date.available 2009-12-15T12:02:49Z en
dc.date.issued 2007 en
dc.identifier.citation Axel Polleres, Roman Schindlauer "Stijn Heymans, David Pearce, Axel Polleres, Edna Ruckhaus, Gopal Gupta (editors) "dlvhex-sparql: A SPARQL-compliant query engine based on dlvhex", 2nd International Workshop on Applications of Logic Programming to the Web, Semantic Web and Semantic Web Services (ALPSWS 2007), in conjunction with ICLP 2007, CEUR, 2007. en
dc.identifier.uri http://hdl.handle.net/10379/528 en
dc.description.abstract This paper describes the dlvhex SPARQL plugin, a query processor for the upcoming Semantic Web query language standard by W3C. We report on the implementation of this languages using dlvhex, a flexible plugin system on top of the DLV solver. This work advances our earlier translation based on the semantics by Perez et al. towards an engine which is fully compliant to the official SPARQL specification. As it turns out, the differences between these two definitions of SPARQL, which might seem moderate at first glance, need some extra machinery. We also briefly report the status of implementation, and extensions currently being implemented, such as handling of aggregates, nested CONSTRUCT queries in the spirit of networked RDF graphs, or partially support of RDFS entailment. For such extensions a tight integration of SPARQL query processing and Answer-Set Programming, the underlying logic programming formalism of our engine, turns out to be particularly useful, as the resulting programs can actually involve unstratified negation. en
dc.format application/pdf en
dc.language.iso en en
dc.publisher CEUR en
dc.subject.lcsh Query languages (IComaputer science) en
dc.subject.lcsh Semantic Web en
dc.title dlvhex-sparql: A SPARQL-compliant query engine based on dlvhex en
dc.type Workshop paper en
dc.description.peer-reviewed peer-reviewed en
dc.contributor.funder inContext en
dc.contributor.funder Science Foundation Ireland en

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