港口管理信息系统数据字典

Data-Dictionary for the Port Management Information System

文章论述了数据字典在数据管理中的重要作用,规定了港口数据库开发过程中的三种数据字典,即系统分析阶段的需求字典,概念设计和逻辑设计阶段的设计字典,以及物理实现阶段的应用字典,并给出了各类字典的具体结构和内容。

The paper expresses that the data-dictionary acts a very impartant role in the course of data administration.Three kinds of data-dictionaries are stipulated,they are the requiremant dictionary in the system analysis phase,the design dictionary in the conceptual and logical design phases as well as the application dictionary in the physical implementation phase.And the concrete stractures and con- tents of these data-diclionaries are given.