Slide 20 of 32
Notes:
Figure 2 is an instantiation of this PEAnet knowledge structure for a simple process lighting a lamp when a switch is flipped. The action is for the user to flip the switch by moving the toggle a part of the switch. This triggers the process change toggle position which changes the value of the property toggle position from up-to-down or down-to-up, which in turn, changes the appearance of the switch as shown in the portrayals pictured. The change in toggle position also triggers another process, light lamp, which in turn changes the value of the lamp lighted property from on-to-off or from off-to-on with a corresponding change in the appearance of the lamp as depicted by the portrayals shown.
