Only DMSs access data sources, SDO applications do not.
只有DMS访问数据源，SDO应用程序不访问数据源。
To update backend data sources, DMSs should use the powerful features of SDO, more specifically its change summary.
DMS应该使用SDO的强大特性更新后端数据源，具体地说，就是要使用其变更摘要。
A data mediator framework is not in the scope of the SDO 1.0 specification; in other words, SDO 1.0 doesn't talk about specific DMSs.
数据中介框架不属于SDO 1.0规范，换句话说，SDO 1.0没有涉及具体的DMS。
A data mediator framework is not in the scope of the SDO 1.0 specification; in other words, SDO 1.0 doesn't talk about specific DMSs.
数据中介框架不属于SDO 1.0规范，换句话说，SDO 1.0没有涉及具体的DMS。
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