摘要： 为了解决大型系统开发过程中数据访问的一致性、实时性以及数据透明性等问题，该文拓展了数据访问中间件的概念，重点介绍了一个能够适应分布式信息系统开发应用需要的数据访问中间件的设计方案以及软件实现技术。

关键词: 中间件；服务端；客户端；访问协议

Abstract: This paper develops the concept of database accession middleware to overcome the problems such as consistency, real-time capability and disinterested degree of data accession present in the process of developing great database system. At the same time, this paper emphasizes much more presentations of the design and realization of database accession middleware system, which can meet the need for developing distributed information application system.

Key words: Middleware; Server; Client; Access protocol