...词：元数据；数据集成；中间件；元数据字典 [gap=564]Key words:metadata; data Integration; middleware; metadata dictionary ...
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Meanwhile, provides a method to realize a integrating system of heterogeneous databases, and introduce detailed the realization of metadata dictionary and manage agent based-XML.
同时，提出了一种基于该结构的异构数据库集成系统的实现方法，对其中基于XML的元数据字典及管理代理的实现进行了详细说明。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
当一个查询提交客户站点，首先使用元数据字典对查询进行转换，将它转换成相应异种站点上的查询。
When a query is posed to a client site, a metadata dictionary is used to translate the query into queries appropriate for the individual heterogeneous sites involved.
探讨了完备的交通事故信息数据库的内容构成，认为应包括空间数据库、影响因素数据库以及元数据和数据字典库三大部分；
The contents of a perfect traffic accident information spatial-database should include three parts, i. e. spatial-database, influential factors database and database of metadata and data dictionary.
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