[comp.ai] Help : On frame based expert system shells

apm@computing-maths.cardiff.ac.uk (A P Madurapperuma) (10/13/90)

 Could somebody send me some pointers to - Explanation facilities in Frame-basedExpert system shells. 
 Any information would be appreciated.
 Thanking you, 
Ajith (apm@uk.ac.cf.cm)