很多业务流程模型都需要显示控制流和数据流在流程中是如何分支和联接的。
Many business process models need to show how control and data flows branch and join within the process.
一个绿色的矩形图标会覆盖，如图7所示，它显示了模型项目置于源代码控制之下。
A green rectangle icon overlay, as illustrated in Figure 7, indicates that the model project is under source control.
第一种方法只能显示控制流，因此您无法用它建立这些decision的模型。
You could not model these decisions in the first approach, because it only showed the control flow.
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