指出用户在数字图书馆虚拟空间内所形成的虚拟社区是很有价值的情报源,通过采用分级学科树区分和组织用户社区,结合支持用户社区内/间通信、协作及信息管理的用户代理服务,可以实现基于分级学科树的协同浏览,帮助图书馆用户提高信息搜寻效率,缓解资源过载和资源耗散问题。 It points out that the virtual community formed by the users in the virtual space of digital library is a valuable intelligence source. By using hierarchical disciplinary tree to distinguish and organize user communities, combined with user agent services that support intra / inter communication, collaboration and information management in user communities , Which can realize the collaborative browsing based on the hierarchical subject tree and help the library users to improve the efficiency of information search and alleviate the problems of resource overload and resource dissipation.