Exchange System, Based On Xml Technology Data Between Heterogeneous Databases

With the development of computer technology, almost all firms are using concerned administrative system, which are often initiated by different companies. So there is an issue, that's they always perform under different levels or different environment of the databases , so it is difficult to realize the share /the exchange and the coordination of the database .Furthermore , the information of individual firms is respective . In such conditions, it is hard to have some new demanding come true, such as coordinative work in different systems, datamining, offering the same interface for outside visitors, so heterogeneous databases are becoming urgent demand.Considering the practical item application, this paper analyses the limitation of original databases. Based on current trend of network database technology , this paper bring up an executive - plan :" base on XML, B/S three - ply structure government network system heterogeneous databases information -sharing " .This paper introduces the approach to some key questions including dynamic creating information resource directory based on sharing information of heterogeneous databases, dynamic creating query statement to realize heterogeneous database' s local querying , the translation from query result to XML documents .