改进E／R模型及其应用

Improvement of E/R Model and its Application

本文针对传统Ｅ／Ｒ模型中实体、特征及联系的定义缺乏唯一性的缺陷，提出了一种改进Ｅ／Ｒ模型（方法），并给出了一个用改进Ｅ／Ｒ模型描述的生产数据模型。

To fill the vacancy of the less unification in definiting the attributes and relationshby using the traditional E/R model, an improved E/R. model was proposed in this paper. A production data model described by using the improved model was presented sa an example in the application.