名称为while循环的系统任务指向一个活动集，该活动集包含与while循环中的任务对应的任务(图12)。

The system task named while loop points to an activity set that contains tasks corresponding to the ones in the while loop (Figure 12).

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将主数据集呈现给用户后，用户可以开始执行一些任务，完成mashup支持的业务活动。

After the primary data set has been presented to the user, the user can start to perform tasks to accomplish whatever business activity is supported by the mashup.

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