http://garabedyan.wordpress.com/2008/03/04/data-flow-processing-eventbased-algorithms-and-data/
Boxes (algorithm atoms) and circles (event triggers) are connected with lines. Some lines has pointers which shows how the interest is orientated. When there is no pointer, the interest is on the both directions. When some output result of any atom/ trigger is changed (on the base of some previous computation or some event) all interested atoms are called to recompute their output results because of the relation of the results with the change. This is repeated until there are no interested atoms of some result change, or the change doesn’t produce result change in the interested atoms.
