| Database makes great progress constantly in past fifty years. It greatly impelled the process of government and enterprise informationization, with the developing of the Internet technology, government and enterprise urgently need integrate the dispersive system, so the resource can be used adequately. The main issue of system integration is common information sharing .Therefore, how to achieve the goal of common information sharing is a big problem of the goverment and enterprise. And with the features of platform independency, extendibility, and self-description, XML becomes the factual standard of data exchange. This thesis discusses the main problems of the data exchange of heterogeneous databases. Then it presents an XML based data exchange models. Finally, it discusses a instance based on this model of data exchange of heterogeneous database system.This thesis firstly presents the knowledge of XML, discusses the related theory of data exchange of heterogeneous database, analyzes the traditional data exchange methods and problems, discusses technology related to the heterogeneous database exchange. Then it analyzes the possibility of XML based data exchange from the aspects of schema binding of XML and relation database, data structure binding of XML and relation database, data format binding of XML and relation database. It investigates the support of the typical database products to the XML and the conversion tools between XML and database. Finally, it develops a XML based three-layer model for implementing data exchange of heterogeneous database .It provides a solving schema for the problems of data exchange of heterogeneous database and implements the data exchange between Oracle database and SQL Server 2000 database by using ADO.NET API through XML under the .NET environment.The thesis implements a XML-based data exchange system under the .NET frame. Both of them have been successfully applied to the e-business system for a certain online bookstore. |
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