地理信息元数据查询系统是空间数据交换中心的重要组成部分。

The geo-metadata query system is an important component of the spatial data exchange center.

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介绍了一种立即计算谓词并即时输出的XML流数据查询系统XSIEQ。

XSIEQ(XML stream query with immediate evaluation), a kind of XML stream query system, can evaluate predicates immediately and output in time.

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方法利用计算机网络及大型数据库系统 ，建立与超稠油开发密切相关的生产决策系统与动态数据查询系统。

Method Decision making system and dynamic data referring system, closely related withsuper heavy oil rccovery, is established by using computer network and large scale data base.

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