很多数据源包括的数据都是和存储信息无关的，例如计数器，用来分类数据的临时助手以及用户接口的多种语言文本。

Many data sources include data that is irrelevant for understanding stored information, such as counters, temporary helper tables used to sort data, and multilingual text for the user interface.

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请注意JNDI名称是如何同您设计数据库时创建的数据源名称相关联的。

Note how the JNDI names tie up with the datasource names you created when you were planning the database.

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为了处理后一个问题，联合服务器还必须使用一系列关于操作环境的信息以及源数据的统计数据。

In order to address the latter question, the federation server must also utilize a range of information about the operational environment as well as statistics of the source databases.

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