用文法分析方法和E-P图实现系统分析设计的第一步

Make the First Step of System Analysis and Design by Syntax Analysis and E-P Diagrams

正确的系统分析与设计在应用系统的开发中起着重要的作用，而现实系统的纷繁复杂常常使系统分析人员很难理清现实事务间的关系。文章探索了一种用文法分析方法和E－P（Entity－Property）图来实现将现实事物和业务关系转换成数据库结构的途径，并结合一个开发实例说明了应用这种方法设计出的库结构能充分反映现实事务关系。

： System analysis and design is very important for developing an application system．But the system in the real life is so complicated that it is difficult for system analyst to make the relationships of the entities and processes clear．This article researches a method of using the syntax analysis and E－P（Entity－Property）diagrams to transform the entities and processes in the real life into the structures of database．Furthermore an example is shown to give a prove that the structures of the database designed by this method can reflect the relationships of the real entities and processes．