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| rdf:type
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| 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)
- Prezentace výsledků studia relačního modelu dat na doménách s podobnostmi, rozšíření pro podobnostní dotazy a extrakci znalostí. (cs)
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| Title
| - Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction.
- Relační model dat na doménách s podobnostmi: rozšíření pro podobnostní dotazy a extrakci znalostí (cs)
- Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. (en)
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| skos:prefLabel
| - Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction.
- Relační model dat na doménách s podobnostmi: rozšíření pro podobnostní dotazy a extrakci znalostí (cs)
- Relational model of data over domains with similarities: an extension for similarity queries and knowledge extraction. (en)
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| skos:notation
| - RIV/61989592:15310/06:00002583!RIV07-AV0-15310___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61989592:15310/06:00002583
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Relational model; domains with similarities; similarity queries; knowledge extraction. (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...i/riv/kodPristupu
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...telVyzkumneZpravy
| - IEEE Computer Society Press
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Bělohlávek, Radim
- Vychodil, Vilém
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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