[摘要] 异构数据库的跨库检索是电子资源整合的核心技术，本文介绍了异构数据库的特征、异构数据库的连接和数据交换技术；探讨了跨库检索系统应具备的功能和应注意的问题，并对国外一些有影响的跨库检索系统进行了介绍。
[关鍵词] 异构数据库 跨库检索 数据库连接 Webfeat MetaLib
[Abstract] Cross searching technique for heterogeneous database is core technology of integrating electronic resource. The paper has introduced the character of heterogeneous database, the technology of heterogeneous databases connection and information exchanging. It also discussed the function of cross retrieval system for heterogeneous databases. The paper has also included a survey of foreign products in cross database searching.
[Keywords] Heterogeneous databases Cross database searching Database connection Webfeat MetaLib
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