ABSTRACT
In this chapter, we look at two implementations of schema-based reasoning. Although the Consumer Advisor System (cas) (Turner, 1986, 1987b) can be viewed as an initial attempt at constructing a schema-based reasoner, medic is the most complete implementation to date. medic is a medical diagnostic consultant implemented at the Georgia Institute of Technology; it runs on a special-purpose LISP machine. Orca, a schema-based reasoner whose domain is autonomous underwater vehicle control, is currently under construction at the University of New Hampshire; it will run both on general-purpose hardware and, ultimately, on embedded computers within real vehicles.
