: 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)
: The pipelines (usually arrows) showing the path data takes between components. Hierarchical Levels of DFDs dfd.rar
: Sources or destinations outside the system boundaries. : Decomposes processes further until the logic can
: Repositories where data is held for later use, such as databases or files. such as databases or files.