正如如果没有RDF我们就难以在互联网上整合数据库一样，应用程序的跨互联网整合也遇到了同样的问题。
In much the same way that databases cannot be easily integrated on the current web without RDF, the same applies to bringing programs to the web.
联邦检索系统源于对跨平台资源整合的需求，它允许用户通过一个统一的平台同时检索多个网络数据库、书目以及其他馆藏信息。
Federated search system follows the demand of integration of heterogeneous resources, and it allows users to search different databases, catalogs and other collections at the same time.
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