【摘要】 分析了中国石油数据标准存在的问题 ,提出了数据词典编制的基本思路 ,给出了中国石油信息系统数据词典的设计原理 .该数据词典中定义了数据项的语法、语义、完整性约束、属性规范值等基本内容 ,还定义了数据流图、数据采集规程、数据域、属性、E -R图、实体集等 .设计出数据词典的元模型逻辑结构 ,建立了元数据库 ,采用B/S模式实现了数据词典在WEB上的发布、搜索功能更多还原

【Abstract】 Data Dictionary is one of the most important facility of data base designing and analysis. This paper analyses the problem in present data sta ndard in PetroChina, and introduces the principle of PetroChina information syst em data dictionary. The data dictionary defines not only the basic content of da ta item such as syntax, semantics, constraint for integrity, attribute standard value, but also content such as data flow diagrams, data collecting rules, data domain, attribute, ER diagrams and entity collection. The paper presents the log ic structure of data dictionary meta model, and create meta database, and implem ent the function such as data dictionary publishing and searching on web in B/S manner.更多还原