Design and implement of PetroChina information system data dictionary

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.