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构造型提供了元模型级的继承，而标记在元模型级提供了向构造型增加类属性信息的机制。
While a stereotype offers metamodel-level inheritance, a tag offers a metamodel-level mechanism to add attribute-like information to a stereotype.
一个过程工程任务需要对RUP分类法(元模型)具备很好的理解，以及具备相互兼容的扩展机制。
A process engineering task requires good understanding of RUP taxonomy (meta-model) and availability of a consistent extension mechanism.
当前的工作流过程元模型不支持对知识管理机制的表示。
Yet knowledge management mechanisms can not be represented by current workflow process definition meta models.
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