为了处理该查询，DB 2查询编译器查阅DB 2联邦数据库系统编目中的信息以及数据源包装器模块中的信息。

To process the query, the DB2 query compiler consults information in the DB2 federated database system catalog and the data source wrapper modules.

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模块与目标服务的交叉—这种模式能够查询与模块和目标服务相关的中介策略信息的WSRR。

Intersection of Module and Target Service - this provides the capability to query WSRR for mediation policy information associated with both the Module and Target Service.

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本系统的查询统计模块主要包括有线路沿线设备查询、全线车站查询、全线设备统计和全线各车站信息统计等。

The querying and statistic module of the system mainly include equipment querying, railway station querying, equipment statistic and every railway station information querying for the whole railway.

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