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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