Business system users update and query master data typically through the use of their respective business systems.
通常情况下，业务系统用户通过各自的业务系统更新和查询主数据。
In a relational language, such a query would require a join that might span several data tables and system catalog tables.
而在关系语言中，这种查询需要进行也许跨越了多个数据表和系统目录表的联接。
It is available for query through the EPCIS query control interface, but the means by which master data enters the system is not specified in the current EPCIS 1.0 standard.
可以通过EPCIS查询控制接口查询这些数据，但是当前的EPCIS 1.0标准中没有指定将管理数据输入系统的方法。
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