Multiple views and abstractions with an extended-entity-relationship model

Gerd Schiffner*, Peter I Scheuermann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The features of the Entity-Relationship model are examined, as a means for representing both the conceptual schema and the external schema in a database system. In order to serve in this dual capacity, its modelling features are extended to support multiple user views. We show how to represent a model and present a suitable diagrammatic technique. To represent these concepts at the user level we propose a data definition language with a concise and simple structure. Furthermore, guidelines are given for interfacing the E-E-R schema with existing DBTG-like systems.

Original languageEnglish (US)
Pages (from-to)139-154
Number of pages16
JournalComputer Languages
Volume4
Issue number3-4
DOIs
StatePublished - Jan 1 1979

Keywords

  • Conceptual schema
  • Data
  • Data abstraction
  • Database systems
  • Definition language
  • External schema

ASJC Scopus subject areas

  • Computer Science(all)

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