资料来源 : Free On-Line Dictionary of Computing

entity-relationship model
     
         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].
     
        (1998-03-20)