| 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, 19(2): 178-183. |
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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, 计算机科学与工程系, 武汉市珞喻路39号, 430070 |
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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 |
| 收稿时间： | 1993-09-24 |
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, 19(2): 178-183. |
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| Authors: | Zeng Ping |
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| Affiliation: | Dept. of Computer Science and Engineering, WTUSM, Luoyu Road 39, Wuhan, China, 430070 |
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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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