在不同数据模型元素中非常有可能产生竞争规范。
There will very likely be competing specifications for an element in different data models.
实体及关系处于第一等级，用复合数据模型元素表示。
Entities and relationships are first class citizens and are represented by the CompositeData model element.
这包括确定和了解信息语义，如数据模型元素的含义以及结构信息等。
This includes identifying and understanding the information semantics, such as the meaning of the data model elements as well as structural information.
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