A graph-rewriting approach to high-level task planning-an introduction

Introduces graph-rewriting methodology for robotic task planning. An approach to represent a high-level task plan in the form of a graph and modify it to accommodate various planning strategies is proposed. Explicitly delineated graph-rewrite rules and their ordered applications are used to reflect the change in plans by changing the graph topology. A framework for modeling complex manipulation tasks as interconnection of simpler subtasks and events connecting them is presented. Using a simple example, it is demonstrated how various plans can dynamically evolve as a function of events.