包含关系和扩展关系两者最大的不同在于，包含关系中的"被包含用例"(included use case)是"一定"会执行，但是扩展关系中的"扩展用例"(extending use case)则是"可能"会执行。
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Figure 3: test cases are derived from use case scenarios; evaluation points are derived from personas and included in the test cases.
图3：测试用例源于用例情境，评估点源于角色并包含于测试用例中。
We could use the EMF tools to generate an EMF model from the XML schema, but in this case there is no need because the EMF model corresponding to the schema is included with the Modeler tools.
我们可以使用EMF工具来从XML模式生成emf模型，但本例中没有这个必要，因为与模式对应的EMF模型包括在Modeler工具中。
The outputs of the human activity use case (successful or otherwise) must be detected and handled by the long-running process use case that included it.
人员活动用例的输出(成功或失败)必须由将其包括在其中的长时间运行的流程用例进行检测和处理。
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