Semantic Expression in Books Management DB Design
Lin Tongming (Dept.of Computer Science and Engineering)
This paper mainly discusses the semantic expression problem in Books Management DB Design.The semantic structure in relational model and the usual E-R model both can not perfectly and fully express the semantic character of Books Management DB Design. Therefore the entity subsct and role concept are introduced to solve not only the problem of semantic expression,but also the problems of normalization of the nondeterministic entity set and nonhomogeneous relation. This design apprcach is also applicable for other DB designs.