entity-relationship model

(redirected from Entity-relationship models)

entity-relationship model

(database, specification)
An approach to data modelling proposed by P. Chen in 1976. The model says that you divide your database in two logical parts, entities (e.g. "customer", "product") and relations ("buys", "pays for").

Entity-relationship diagrams can be used to represent a model.

["The entity-relationship model: toward a unified view of data", P.P. Chen, ACM Transactions on Database Systems 1:1 pp 9-36, 1976].
References in periodicals archive ?
26) Robert Maxwell has provided a much more detailed discussion, which treats diagramming methods for entity-relationship models, comparing Chen's system and those used in FRBR and FRAD, and then moves to a consideration of the FRBR entities, relationships, and user tasks, ending with a comparison between the FRBR model and catalogue records produced under AACR2.
12) The analytical technique used was derived from systems-development methods, particularly the entity-relationship model popularized in the academic community by Peter Chen and reported in his 1976 work with reference to datasets relevant to business functions.
The sources of the entity-relationship model incorporated in the FRBR report are given early in the document.
Dealing with Complexity: A Practical Method for Representing Large Entity-Relationship Models.
In the following we first present the gist of the Entity-Relationship model as our basis for schema design following [18].
Readers should already be familiar with the basics of relational and Entity-Relationship models, as well as with information systems and information system design.