In this paper, we put emphasis on several key retrieval tools and use on mathematical documentary information.
本文着重介绍了国内和国外几种主要数学文献信息检索工具和使用方法。
XML database support is a key element of the On Demand Operating Environment, providing storage and retrieval of XML data in IMS databases.
XML 数据库支持是随需应变运行环境中的一个重要方面，它支持在 IMS 数据库中存储和检索 XML 数据。
Solving the problems associated with service discovery and service description retrieval is key to the success of Web services.
解决与服务发现和服务描述检索有关的问题是Web服务成功的关键。
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