According to the edge of XML in the data integration and exchange, the paper resents a XML-based heterogeneous database integration middleware.

本文以XML在数据集成和交换上的优势，提出了一个基于XML的异构数据库集成中间件的解决方案。

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For XML-based messages, consumers can express their expectations using languages such as XPath or Schematron, both of which work well in a heterogeneous technology environment.

对于基于XML的消息来说，消费者可以用诸如xpath或Schematron这样的语言来表达他们的期望，在异质技术环境下这两种语言都比较好用。

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Based XML, this paper introduces a mode for heterogeneous data exchange system, discusses the function of every module in system and its workflow.

基于XML该文提出了一个异构数据交换的系统模型并探讨了该系统中各模块的功能和工作流程。

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