由RMC所提供的三个不同的可变性模式是：贡献、扩展和置换。

The three different variability patterns supported by RMC are contribution, extension, and replacement.

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使用“置换”模式，您能够修改元素的各个部分而不会影响到内容库中的初始的元素定义。

By applying the "replaces" pattern, you can modify parts of the element without affecting an original element definition in the content library.

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置换一个元素的结果是创建出一个具有不同内容的新元素，但它仍然被所有相同的交付过程和功能模式所引用。

The net effect of replacing an element is the creation of a new element with a different content that is still referenced by all the same delivery processes and capability patterns.

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