作者
Paul Johannesson
发表日期
1994/2/14
研讨会论文
Proceedings of 1994 IEEE 10th International Conference on Data Engineering
页码范围
190-201
出版商
IEEE
简介
A major problem with currently existing database systems is that there often does not exist a conceptual understanding of the data. Such an understanding can be obtained by describing the data using a semantic data model, such as the ER model. Consequently, there is a need for methods that translate a schema in a traditional data model into a conceptual schema. We present a method for translating a schema in the relational model into a schema in a conceptual model. We also show that the schema produced has the same information capacity as the original schema. The conceptual model used is a formalization of an extended ER model, which also includes the subtype concept.< >
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P Johannesson - Proceedings of 1994 IEEE 10th International …, 1994