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Titolo:
Improving database design through the analysis of relationships
Autore:
Dey, D; Storey, VC; Barron, TM;
Indirizzi:
Univ Washington, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 iv Washington, Seattle, WA 98195 USA Georgia State Univ, Atlanta, GA 30303 USA Georgia State Univ Atlanta GA USA 30303 State Univ, Atlanta, GA 30303 USA Univ Toledo, Toledo, OH 43606 USA Univ Toledo Toledo OH USA 43606Univ Toledo, Toledo, OH 43606 USA
Titolo Testata:
ACM TRANSACTIONS ON DATABASE SYSTEMS
fascicolo: 4, volume: 24, anno: 1999,
pagine: 453 - 486
SICI:
0362-5915(199912)24:4<453:IDDTTA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOGICAL DESIGN; CONSTRAINTS; METHODOLOGY; SCHEMATA; MODEL;
Keywords:
design; Conceptual model; ER model; integrity constraint; min-max cardinality; relationship degree; weak relationship;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Dey, D Univ Washington, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 ington, Seattle, WA 98195 USA
Citazione:
D. Dey et al., "Improving database design through the analysis of relationships", ACM T DATAB, 24(4), 1999, pp. 453-486

Abstract

Much of the work on conceptual modeling involves the use of an entity-relationship model in which binary relationships appear as associations betweentwo entities. Relationships involving more than two entities are considered rare and, therefore, have not received adequate attention. This research provides a general framework for the analysis of relationships in which binary relationships simply become a special case. The framework helps a designer to identify ternary and other higher-degree relationships that are commonly represented, often inappropriately, as either entities or binary relationships. Generalized rules are also provided for representing higher-degree relationships in the relational model. This uniform treatment of relationships should significantly ease the burden on a designer by enabling him orher to extract more information from a real-world situation and represent it properly in a conceptual design.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 04:44:41