The paper discusses an important concept in the field of data bases,that is conceptualschema framework.First,the paper defines the concept of framework,and discusses two key terms:an universe of discourse(UOD)and a co...The paper discusses an important concept in the field of data bases,that is conceptualschema framework.First,the paper defines the concept of framework,and discusses two key terms:an universe of discourse(UOD)and a conceptual schema(CS).Then,we classify the instancesand objects,define a paradigm describing the UOD and CS,and arrive at the conceptual schemaframework(CSF).Finally,the paper discusses some problems of modeling paradigm and implemen-tation paradigm.And the paper is closed out by discussing some applications of this framework.展开更多
文摘The paper discusses an important concept in the field of data bases,that is conceptualschema framework.First,the paper defines the concept of framework,and discusses two key terms:an universe of discourse(UOD)and a conceptual schema(CS).Then,we classify the instancesand objects,define a paradigm describing the UOD and CS,and arrive at the conceptual schemaframework(CSF).Finally,the paper discusses some problems of modeling paradigm and implemen-tation paradigm.And the paper is closed out by discussing some applications of this framework.
