该扩展要求transformationextension子元素(每个对应要扩展的一种类型的转换)。

This extension expects TransformationExtension child elements (one for each type of transformation to extend).

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对于与复合状态兼容的每一种元数据类型，子状态机中的每一个转换都有一个限制策略。

For each metadata type compatible with a composite state, every transition in the sub-state machine has a policy for restriction.

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由于源和目标具有相同类型Address，该子映射仅包括带address属性的参数之间的移动转换。

Because the source and target have the same type, Address, the submap consists only of move transforms between parameters with Address attributes.

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