Extended Self-containing Prolog <language> (ESP) An {object-oriented} extension of {KL0} by Chikayama. ESP has {backtracking}-based control, {unification}-based parameter passing and {object-oriented} calling. An {object} in ESP is an {axiom} set. A {class} definition consists of nature definitions ({inheritance}), slot definitions ({class variables}) and {clause} definitions. ESP has {multiple inheritance} similar to {Flavors}. It has been implemented for {ICOT}'s {PSI} Sequential Inference machine. See also {CESP}. E-mail: <[email protected]>. ["Unique Features of ESP", T. Chikayama, Proc Intl Conf 5th Gen Comp Sys, ICOT 1984]. (1994-12-08)