About: Conjunctive Query Optimization in OWL2-DL

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.springerlink.com/content/x571113660m36144
Description	Conjunctive query answering is becoming a very important task on the Semantic Web as the adoption of SPARQL query language increases. There is considerable work done in the area of optimizing conjunctive query answering for RDF and OWL2-DL ontologies, in the latter case namely for queries without undistinguished variables. However, there has not been much emphasis on how to handle queries with both distinguished and undistinguished variables efficiently. In this paper, we present a novel algorithm for answering conjunctive queries over OWL2-DL ontologies with undistinguished variables efficiently. These optimizations are implemented in the Pellet query engine and our experimental evaluation shows that the new optimization improves the query performance significantly. Conjunctive query answering is becoming a very important task on the Semantic Web as the adoption of SPARQL query language increases. There is considerable work done in the area of optimizing conjunctive query answering for RDF and OWL2-DL ontologies, in the latter case namely for queries without undistinguished variables. However, there has not been much emphasis on how to handle queries with both distinguished and undistinguished variables efficiently. In this paper, we present a novel algorithm for answering conjunctive queries over OWL2-DL ontologies with undistinguished variables efficiently. These optimizations are implemented in the Pellet query engine and our experimental evaluation shows that the new optimization improves the query performance significantly. (en)
Title	Conjunctive Query Optimization in OWL2-DL Conjunctive Query Optimization in OWL2-DL (en)
skos:prefLabel	Conjunctive Query Optimization in OWL2-DL Conjunctive Query Optimization in OWL2-DL (en)
skos:notation	RIV/68407700:21230/11:00181758!RIV12-MK0-21230___
http://linked.open...avai/predkladatel	Fakulta elektrotechnická
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(DF11P01OVV002), Z(MSM6840770038)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Kouba, Zdeněk Křemen, Petr
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta elektrotechnická
http://linked.open...dnocenehoVysledku	191683
http://linked.open...ai/riv/idVysledku	RIV/68407700:21230/11:00181758
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	OWL2-DL; conjunctive query; optimization (en)
http://linked.open.../riv/klicoveSlovo	OWL2-DL conjunctive query optimization
http://linked.open...ontrolniKodProRIV	[0DEA88806217]
http://linked.open...v/mistoKonaniAkce	Toulouse
http://linked.open...i/riv/mistoVydani	Berlin
http://linked.open...i/riv/nazevZdroje	Database and Expert Systems Applications
http://linked.open...in/vavai/riv/obor	IN
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Defects in immovable cultural heritage objects: a knowledge-based system for analysis, intervention planning and prevention
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Kouba, Zdeněk Křemen, Petr
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2011-08-29 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Decision Making and Control for Manufacturing III
issn	0302-9743
number of pages	15 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/978-3-642-23091-2_18
http://purl.org/ne...btex#hasPublisher	Springer-Verlag
https://schema.org/isbn	978-3-642-23090-5
http://localhost/t...ganizacniJednotka	21230
is http://linked.open...avai/riv/vysledek of	Conjunctive Query Optimization in OWL2-DL Conjunctive Query Optimization in OWL2-DL

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