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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F07%3A00003621%21RIV08-AV0-15310___
rdf:type
skos:Concept n19:Vysledek
dcterms:description
The paper presents new developments in an extension of Codd's relational model of data. The extension consists in equipping domains of attribute values with a similarity relation and adding ranks to rows of a database table. This way, the concept of a table over domains (i.e., relation over a relation scheme) of the classical Codd's model extends to the concept of a ranked table over domains with similarities. When all similarities are ordinary identity relations and all ranks are set to 1, our extension becomes the ordinary Codd's model. The main contribution of our paper is twofold. First, we present an outline of a relational algebra for our extension. Second, we deal with implementation issues of our extension. In addition to that, we also comment on related approaches presented in the literature. Ukazujeme rozšíření relační algebry, jejímž hlavním prvkem je datová tabulka s podobnostmi na doménách a ranky. Ukazujeme zobecnení operací relační algebry a navrhujeme implementaci takových tabulek v soudobých SřBD. The paper presents new developments in an extension of Codd's relational model of data. The extension consists in equipping domains of attribute values with a similarity relation and adding ranks to rows of a database table. This way, the concept of a table over domains (i.e., relation over a relation scheme) of the classical Codd's model extends to the concept of a ranked table over domains with similarities. When all similarities are ordinary identity relations and all ranks are set to 1, our extension becomes the ordinary Codd's model. The main contribution of our paper is twofold. First, we present an outline of a relational algebra for our extension. Second, we deal with implementation issues of our extension. In addition to that, we also comment on related approaches presented in the literature.
dcterms:title
Relational algebra for ranked tables with similarities: properties and implementation Relational algebra for ranked tables with similarities: properties and implementation Relační algebra pro ranked tabulky s podobnostmi: vlastnosti a implementace
skos:prefLabel
Relational algebra for ranked tables with similarities: properties and implementation Relační algebra pro ranked tabulky s podobnostmi: vlastnosti a implementace Relational algebra for ranked tables with similarities: properties and implementation
skos:notation
RIV/61989592:15310/07:00003621!RIV08-AV0-15310___
n3:strany
140-151
n3:aktivita
n8:P n8:Z
n3:aktivity
P(1ET101370417), Z(MSM6198959214)
n3:cisloPeriodika
N
n3:dodaniDat
n15:2008
n3:domaciTvurceVysledku
n7:1236784 n7:9623264 n7:7103735
n3:druhVysledku
n6:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
447163
n3:idVysledku
RIV/61989592:15310/07:00003621
n3:jazykVysledku
n4:eng
n3:klicovaSlova
relational algebra; ranked table; similarity
n3:klicoveSlovo
n13:ranked%20table n13:similarity n13:relational%20algebra
n3:kodStatuVydavatele
DE - Spolková republika Německo
n3:kontrolniKodProRIV
[F6FA2C81A766]
n3:nazevZdroje
Lecture Notes in Computer Science
n3:obor
n12:BD
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n18:1ET101370417
n3:rokUplatneniVysledku
n15:2007
n3:svazekPeriodika
4723
n3:tvurceVysledku
Bělohlávek, Radim Opichal, Stanislav Vychodil, Vilém
n3:zamer
n14:MSM6198959214
s:issn
0302-9743
s:numberOfPages
500
n11:organizacniJednotka
15310