这就是过程模型必须完全和任何执行语义分离的原因。
This is why process models must be completely separate from any execution semantics.
标记是 MDA 中的一个步骤或技术，在这个步骤当中，附加的信息（不包含在模型本身的语义范围中）能够被加入到模型中，在随后的自动过程中单独使用。
Marking is a step or technique in MDA in which additional information, not within the semantic scope of the model itself, can be added to a model solely for use by automation later.
在细分的过程中，可能会打断预期的模型间语义连接的变更(尽管不希望出现)。
During this refinement, it is possible (although undesirable) for changes to be made that break the expected semantic connections between the models.
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