| 数据库逻辑设计的E－S－C转换方法 |
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| 引用本文： | 曾平.数据库逻辑设计的E－S－C转换方法[J].武汉大学学报(信息科学版),1994(2). |
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| 作者姓名： | 曾平 |
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| 作者单位： | 武汉测绘科技大学 |
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| 基金项目： | 国家测绘局“八五”科技攻关资助 |
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| 摘 要： | 本文提出了一个基于实体－联系模型（ＥＲＭ）的数据库逻辑设计方法，即由ＥＥＲＭ到ＳＥＲＭ，ＳＥＲＭ到ＣＥＲＭ的转换方法，简称Ｈ－Ｓ－Ｃ方法。首先介绍了一个扩充实体－联系模型（ＥＥＲＭ），定义了简单实体－联系模型（ＳＥＲＭ）及规范实体－联系模型（ＣＥＲＭ），然后给出了ＥＥＲＭ到ＳＥＲＭ，ＳＥＲＭ到ＣＥＲＭ的等价转换规则。
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| 关 键 词： | 数据库 计算机辅助设计 扩充实体－联系模型 |
The E-S--C Transformation Method of Logic Database Design |
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| Zeng Ping.The E-S--C Transformation Method of Logic Database Design[J].Geomatics and Information Science of Wuhan University,1994(2). |
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| Authors: | Zeng Ping |
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| Abstract: | in this paper,a method of logic database design-E-S-C transformation method is presented, which is based on entity-relationship model. Each step of the method can be implemented by algorithm,which is convenient for developing logic database system. An extended entity-relationship model is discribed,and a simple entity-relationship model and a Canonical entity-relationship model are defined. The transformation rules from extended entity-relationShip model to simple entity-relationship model iS given, then the transformation rules from simple entity-relationship model to canonical entity-relationship model. An automatic tool of logic database design using E-S-C method has been developed. |
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| Keywords: | database computer-aid design extended entity-relationship model |
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