conceptual database model

The data flow diagram modules and the views of ER diagram were established based on process modules, and then the way to design database conceptual model was researched.

建立了与过程模块相对应的数据流图模块，在此基础上研究了视图类型并给出了实体联系图的设计方法。

Describes how to derive a conceptual model from an existing database.

介绍如何从现有数据库派生概念模型.

Based on generalized framework for access control, the author has developed an application model on universal database by conceptual and extract business logics.

本文通过对业务逻辑的抽象与提取，形成了通用数据库访问控制框架及在此框架下的访问控制要素的聚类模型。

Then use the database modeling tools called Power Designer to establish the conceptual data model and complete the design of the structure of business data.

利用Power Designer数据库建模工具建立概念数据模型，进而完成对业务数据结构的设计。