A graphical data manipulation language for an extended entity-relationship model

A graphical data manipulation language for an extended entity-relationship model

A user can formulate database queries and updates graphically, by manipulating schema diagrams. The authors based the graphical data manipulation interface on the entity-relationship (ER) model because of its widespread use and increasing popularity. They use an extended ER model incorporating vario...

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Veröffentlicht in:Computer (Long Beach, Calif.) Calif.), 1990-03, Vol.23 (3), p.26-36
Hauptverfasser: Czejdo, B., Elmasri, R., Rusinkiewicz, M., Embley, D.W.
Format: Artikel
Sprache:eng
Schlagworte:
Computer interfaces
Database languages
Database systems
Displays
Erbium
Formal specifications
Information retrieval
Marine vehicles
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Zusammenfassung:A user can formulate database queries and updates graphically, by manipulating schema diagrams. The authors based the graphical data manipulation interface on the entity-relationship (ER) model because of its widespread use and increasing popularity. They use an extended ER model incorporating various forms of generalization and specialization, including subset, union and partition relationships. They call their model the extended conceptual entity-relationship or ECER model. A comparison with other graphical entity-relationship interfaces is included.< >
ISSN:0018-9162
1558-0814
DOI:10.1109/2.50270