Readings in Distributed Artificial Intelligence

HANSEL OROPS

PEBBLES ON

THE TRAIL

CHILDREN FOLLOW

MARKEO TRAIL

OUT OF

THE FOREST

Mecnsoflf CHILDREN Λ 1 Specifies! / CHILDRENΧΛ Specifies,

AT HOME lr* Vf NOT LOST IN

FIG. 12. Part of Hansel's plan for getting out of the forest.

following the trail. This action, however, requires that the trail be marked and

this,

in turn, requires that Hansel have a supply of pebbles with which to do

the marking. Thus, the first two actions are done in order to establish the

preconditions of the final action that gets the children home.

This plan, which is represented in isolation from the context of the

interaction with the parents, is only a small part o