Definitions for "Data Flow Diagram"
a graphical representation of the functional model, showing dependencies between values and the computation of output values from input values without regard for when or if the functions are executed.
A graphical notation used to describe how data flows between processes in a system.  They are a representation of the functional decomposition of a system.
(IEEE) A diagram that depicts data sources, data sinks, data storage, and processes performed on data as nodes, and logical flow of data as links between the nodes. Syn: data flowchart, data flow graph.
easy-to-use and understand tool that identifies the path data takes through the system.
A design technique that permits documentation of a system or program at several levels of generality.
Keywords:  road, visual, symbols, map, description
A visual description or road map – using only four symbols – of how data moves through an information system.