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A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process aspects. DFDs can also be used for the visualization of data processing (structured design).

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Data flow diagram with login

A data-flow diagram is a way of representing the flow of data through a process or a system. This diagram only shows how your data is transmitted to the system and it doesn't show any activity so that …
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