Research and design of exchange middleware of XML document and relational database

This paper puts forward a kind of middleware,which could convert data between XML document and relational database,through transforming the request information preserved in the form of XML document into the request information that the corresponding database can be discerned,and transforming return database data into unified XML document,the middleware realizes the unity interface of different relational databases.This paper discussed how to use XML and middleware technology to realize the exchange of the XML document and relational database especially on the basis of introducing XML and middleware technology.