The Study, Based On Xml Data Exchange

With the development of network technology, the transferring speed of network has been accelerated. Thus, we have more and more new applications based on the Internet. Among all these applications, the electronic data interchange (EDI) is a developing information technology which have great infulence, and now it has become one of most important means for the competing of the international trade.Extensive markup language provide an opening-standard for the safety and efficient electronic commerce.because improving the weakness of the traditional EDI, it brings the small-medium enterprise into the electronic commerc market. The XML-structured data can be separated from the business rule and the expression form, expediently for the data exchange and data process. So the XML is regarded as the standard of data exchange when it just appeared.XML provides an excellent data interface for the native MIS and the application system based on web.but due to the technology of the native XML database is immature,most of data are stored in the relational DataBase,So it becomes the foundation of the aplication of XML in data exchange to solve the corresponding relation between XML data and relational data.First and foremost, this thesis analyzes the weakness of traditional data interchange and expatiates the course of the XML's producation and development. Then, comes to the conclusion that the XML is a good solution to data exchange.at the same time, related XML standard and its application is introduced through combining the E-C model. Next, this thesis emphasizes on the transforming between the XML data and the relational data. Finally, with a typical example for Electronic Commerce, and with XML as a strategy, this thesis analyzes the idea of access to the untransparent database, designs the general algorithm realizing the transformation from a XQL query to a SQL query.