Design Of Heterogeneous Database Data-sharing System Based On XML

At present, database system have became the most used method in the information management. As the fast developing and most comprehensive in computer science technology, database have already became the important technology and support in computer information system and computer applicationsystem. With the database system' s developing, Heterogeneous DataBase System researching is becoming the hotspot.Now, in many cities' information construction, there is a data sharing problem among the government functional departments. In company with the improving of information, the problem of data-sharing among the functional departments is becoming a bottleneck on the advancing of government work efficiency.Depend on the practical item appllcatlo, this paper analyses the limitation in the government network system heterogeneous databases' information-sharing. Such as investment too high, searching information can' t keep consistent with the real data, overlapping investment and overlapping developing, ect. Based on current trend of network database technology, this paper bring up an executive—plan:" Basing on XML, B / S three-ply structure government network system heterogeneous databases information-sharing", and introduces the plan' s integrated design as well as several sixty-four-dollar questions' solutions. Those questions include as well:dynamic creating IRD(Information Recourse Directory) based on sharing information of heterogeneous databases, web layer database's design and manage, dynamic creating SQL query statement to realize heterogeneous database's local data querying the translation from query result to XML document.Through the medium of B / S three-ply structure, the method of realize government network system heterogeneous databases data—sharing, has got several merits such as:low-investment, manageableness,high—efficiency etc.And,it is too apt to generalize at city information construction.