不同领域内模型的无关联性。
您可以使用这种视觉提醒来避免执行只对范围内模型元素可用的操作。
You can use this visual indication to avoid performing operations that are available only for model elements in scope.
企业模型:该层包含的模型版本,被认为是企业内模型的主要集合。
Enterprise models: This layer contains the model versions that are considered the master set of models within the enterprise.
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