entity-relationship model


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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 ?
Improved Visual Entity-Relationship Model Synchronization: with live schemas, making the integrated database modeling tool even more useful for managing schemas.
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.
In the following we first present the gist of the Entity-Relationship model as our basis for schema design following [18].
Therefore, structuring mechanisms as provided by the higher-order entity-relationship model [18] may be used to describe skeletons.
A logical design methodology for relational databases using the extended entity-relationship model.
This is illustrated with an entity-relationship model, one of the two principal approaches used in this book.
Codd also objects to the entity-relationship model on the grounds that it does not allow associations to have properties.
Chen: "The Entity-Relationship Model - Towards a Unified View of Data",ACM TODS Vol 1, No 1, March 1976.
This research investigated how the relationships can be implemented for more efficient urban land and building management using the entity-relationship model and relational database model.
Land parcel, building, and owner entities and their relationships were modeled using the entity-relationship model.
Readers should already be familiar with the basics of relational and Entity-Relationship models, as well as with information systems and information system design.