Dataflow Diagram

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Data flow diagram (DFD) maps out the flow of information for any process or system. It uses defined symbols like rectangles, circle and arrow, plus short text labels, to show data inputs, output, storage points and the routes between each destination. Data flowcharts can range from simple, even hand-drawn process overviews, to in-depth, multi-level DFDs that dig progressively deeper into how the data is handled. They can be used to analyze an existing system or model a new one.