DFD(数据流图)和活动图的区别 [英] Differences between DFD (Data Flow Diagram) and activity diagram

问题描述

我需要了解这些差异才能理解如何正确使用它们.

I need to know this differences in order to undestand how to use them right.

DFD 和活动图的区别是什么?

Which are the differences of DFD and Activity diagram?

推荐答案

实际上，这是合乎逻辑的.你只需要看看名字.

Actually, it's reasonably logical. You only have to look at the names.

在数据流程图中，框"之间的线代表在系统组件之间流动的数据.因为这些只显示了数据的流动，它们并没有给出排序的指示.

In data flow diagrams, the lines between "boxes" represent data that flows between components of a system. Because these only show the flow of data, they do not give an indication of sequencing.

在活动图中，这些线只是活动之间的转换，根本不代表数据流.它们更多地代表了活动和决策的顺序.你可以从这些中看出事情发生的顺序.

In activity diagrams, those lines are simply transitions between activities and do not represent data flow at all. They more represent the sequencing of activities and decisions. You can tell from these what order things happen in.

这是一个简单的解释，但应该是一个很好的起点.更多信息可以从维基百科获取DFDs 和活动图.

That's a simplistic explanation but should be a good starting point. Further information can be garnered from Wikipedia for DFDs and activity diagrams.

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