Schema relevant system catalog information
与模式相关的系统编目信息
A data schema, especially a data subschema in a relational data system.
关系数据系统中的数据模式，特别是子模式。
Data source is the base of the system, which adapted factory schema to be finished.
数据源是系统的基础，采用了“工厂模式”设计与实现该模块；
Data source is the base of the system, which adapted factory schema to be finished.
数据源是系统的基础，采用了“工厂模式”设计与实现该模块；
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