即，您可以从已有的短语和块元素派生出新短语和块元素。

That is, you can derive new phrase or block elements from the existing phrase and block elements.

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所有架构、元素、属性、类型和枚举都必须具有定义，并且它们必须以一组经核准的开始短语（比如 A name of 或 A relationship）中的一个打头。

All schemas, elements, attributes, types, and enumerations must have definitions, and they must start with one of an approved set of beginning phrases, such as A name of or A relationship.

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注意：将类库短语添加到keyword和apiname的元素实体。

Notice that the class library phrases are added to the element entity for keyword as well as for apiname.

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