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出典:Wikipedia
出典:『Wikipedia』 (2011/06/08 16:41 UTC 版)
A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modelling its process aspects. Often they are a preliminary step used to create an overview of the system which can later be elaborated. DFDs can also be used for the visualization of data processing (structured design).