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Definitions of ENTITY-RELATIONSHIP MODEL
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An approach to data modellingproposed by P. Chen in 1976. The model says that you divideyour database in two logical parts, entities (e.g. "customer","product") and relations ("buys", "pays for").One of the first activities in specifying an application isdefining the entities involved and their relationships,e.g. using an entity-relationship diagram to represent amodel.["The entity-relationship model: toward a unified view ofdata", P.P. Chen, ACM Transactions on Database Systems 1:1 pp9-36, 1976].
By Denis Howe