Design And Implement Of General Functionality Interface To Certain Database System

With the development of web and database,in the information development and management,more and more applicatios of infoumation systemes at the same time are necessary.So people brought share with heterogeneous database information.Each relevant database information system alredy existed and has its own database interface and access profile before it was jioned in a standard platform. At the time of realizing the data sharing and fuction combination,Each database system kept its own application characteristic,the integrality control and the security control still, just played as a web service of standard platform while it was integrated toghter.The merits and characteristic of XML一intersection is good,sometime quantity is stronger, it can be formatted and it has nothing to do with the platform,easy to expand--make it easier to describe the heterogeneous database information system and realize the inter-convert between heterogeneous data. Besides,through its own merits,it Can solve the problems一the deficient of inquiries about and optimizes,the integration of heterogeneous database share based on WEB is not very mature , poor expanding-··-existing in heterogeneous database information system at present partly.This paper consider heterogeneous database middleware technology,we chose the Three-tier network architecture as a framework for heterogeneous information system integration platform architecture.Thesis will be applied to XML interface integration technology to design XML-based framework for system integration platform,give the database interface specification of the standard platform for an information system.Middleware with xml data as a descriptive transform tool,through the mapping relationship between the various heterogeneous database xml converted to a unified format,as Xquery query language used to provide users with tools and a unified query interface.Based on XML technology to achieve many of the heterogeneous model of the proposed database informaton system query, to the programmer provides a train of thought to resolve this problem,improve the reusability of the process,reducing the cost of soRware development in order to more reasonable and more effective solution to heterogeneous multi-database data extraction and sharing of the problem.