About: Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction.

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About: Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present an extension of Codd's relational model of data. Our extension is motivated by similarity-based querying. It consists in equipping each domain of attribute values with a similarity relation and in modifying the classical relational model in order to account for issues generated by adding similarities. As a counterpart to data tables over a set of domains of Codd's model, we introduce ranked data tables over domains with similarities. We present a relational algebra, and tuple and domain calculi for our model and prove their equivalence. An interesting point is that our relational algebra contains operations like \mathrm{top}_k (k best results matching a query). Then, we study functional dependencies extended by similarities, argue that they form a new type of data dependency not captured by the classical model, prove a completeness result w.r.t. Armstrong-like rules, describe non-redundant bases and provide an algorithm for computing the bases. In addition to that, we compare our We present an extension of Codd's relational model of data. Our extension is motivated by similarity-based querying. It consists in equipping each domain of attribute values with a similarity relation and in modifying the classical relational model in order to account for issues generated by adding similarities. As a counterpart to data tables over a set of domains of Codd's model, we introduce ranked data tables over domains with similarities. We present a relational algebra, and tuple and domain calculi for our model and prove their equivalence. An interesting point is that our relational algebra contains operations like \mathrm{top}_k (k best results matching a query). Then, we study functional dependencies extended by similarities, argue that they form a new type of data dependency not captured by the classical model, prove a completeness result w.r.t. Armstrong-like rules, describe non-redundant bases and provide an algorithm for computing the bases. In addition to that, we compare our (en)
Title	Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. (en)
skos:prefLabel	Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. (en)
skos:notation	RIV/61989592:15310/06:00002583!RIV10-MSM-15310___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6198959214)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Vychodil, Vilém Bělohlávek, Radim
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	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	497063
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/06:00002583
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Relational model; domains with similarities; similarity queries; knowledge extraction. (en)
http://linked.open.../riv/klicoveSlovo	Relational model domains with similarities knowledge extraction. similarity queries
http://linked.open...ontrolniKodProRIV	[FC224D309BF8]
http://linked.open...i/riv/mistoVydani	New York
http://linked.open...i/riv/nazevZdroje	The 2006 IEEE International Conference Information Reuse and Integration
http://linked.open...in/vavai/riv/obor	BD
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...UplatneniVysledku	2006
http://linked.open...iv/tvurceVysledku	Bělohlávek, Radim Vychodil, Vilém
http://linked.open...n/vavai/riv/zamer	Matematické modely a struktury
number of pages	1500 (xsd:int)
http://purl.org/ne...btex#hasPublisher	IEEE Computer Society Press
https://schema.org/isbn	0-7803-9788-6
http://localhost/t...ganizacniJednotka	15310

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