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《JOURNAL OF COMPUTER RESEARCH AND DEVELOPMENT》 1997-04
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THE DESCRIPTION OF ENTITY RELATIONSHIP IN O O MODEL

LI Tian Zhu (Computing Center,Hebei University,Baoding\ 071002)  
Being able to describe the entity and the entity relationship is a principal feature of databases.It is a basis for the logical design of databases.This paper discusses in detail the description of the entity relationship of 1 1,1 n ,and n m with the high order attributes in O O model,and makes a comparison with the description in relational model. Therefore,O O model has a consistent and efficient method of describing the entity relationship,and it is better than that in relational model.
【Fund】: 国家自然科学基金 河北省自然科学基金
【CateGory Index】: TP311.13
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