针对Internet上信息搜索和数据集成存在的问题，提出了“主动虚拟服务器”的概念，并给出了基于这种虚拟服务器的数据集成模式。主动虚拟服务器可认为是网上海量数据统一的存储和处理器，而且具有主动服务的功能。在不改变服务器中原DBMS的前提下，只需用一种统一的可扩展语言UXL为各种服务器做一件外观统一的“主动服务外套”，就可构成 所需的"主动虚拟服务器"。上述"外套"对每种服务器只需实现一次，就能在整个网上统一使用，因此，它可在网上起到与Java虚拟机类似的作用。

Aiming at solving the problems of information retrieval and data integration over Internet, the idea of “active virtual server” is proposed, and a novel mechanism for data integration based on the virtual server is presented. Active virtual servers can be regarded as the uniform storage and processor of massive data over Internet, with the function of active services. By only using a unified extendable language (UXL) to wrap each kind of server with a uniform interface “active service coat”，the “active virtual server” can be constructed as needed without changing the original DBMS on the server. The above “coat” needs to be done only once for each kind of server, and can be exploited uniformly all over the Internet, hence it plays the role as Java Virtual Machine does.