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: The pipelines (usually arrows) showing the path data takes between components. Hierarchical Levels of DFDs

: Sources or destinations outside the system boundaries. dfd.rar

: Breaks down the context diagram into major subprocesses, revealing more of the system's internal workings. : The pipelines (usually arrows) showing the path

: Decomposes processes further until the logic can be explained simply (e.g., through pseudo-code). File Specifics and Usage How to create a Level-0 Data Flow Diagram (DFD) dfd.rar

To manage complexity, DFDs are organized into levels of increasing detail: