资料来源 : Free On-Line Dictionary of Computing

Data Flow Diagram
     
         A graphical notation used to describe how {data}
        flows between {processes} in a system.  Data flow diagrams are
        an important tool of most {structured analysis} techniques.
     
        {(http://www.smartdraw.com/resources/centers/software/dfd.htm)}.
     
        (2003-05-17)