From the viewpoint of the data flow diagram there is no distinction between inputs and outputs. ... A box represents any person or organizaation, lying outside the context of the system being examined, that is a net originator of information input anbsp;...
|Title||:||Structuring expert systems|
|Author||:||Jay Liebowitz, Daniel A. De Salvo|
|Publisher||:||Yourdon - 1989-01-01|