Prolog
<programming> Programming in Logic or (French) Programmation en Logique. 
The first of the huge family of logic programming languages.
 
Prolog was invented by Alain Colmerauer and Phillipe Roussel at the University 
of Aix-Marseille in 1971. It was first implemented 1972 in ALGOL-W. It was 
designed originally for natural-language processing but has become one of the 
most widely used languages for artificial intelligence.
 
It is based on LUSH (or SLD) resolution theorem proving and unification. The 
first versions had no user-defined functions and no control structure other than 
the built-in depth-first search with backtracking. Early collaboration between 
Marseille and Robert Kowalski at University of Edinburgh continued until about 
1975.
 
Early implementations included C-Prolog, ESLPDPRO, Frolic, LM-Prolog, Open 
Prolog, SB-Prolog, UPMAIL Tricia Prolog. In 1998, the most common Prologs in use 
are Quintus Prolog, SICSTUS Prolog, LPA Prolog, SWI Prolog, AMZI Prolog, SNI 
Prolog.
 
ISO draft standard at Darmstadt, Germany. or UGA, USA.
 
See also negation by failure, Kamin's interpreters, Paradigms of AI Programming, 
Aditi.
 
A Prolog interpreter in Scheme.
ftp://cpsc.ucalgary.ca/pub/prolog1.1.
 
A Prolog package from the University of Calgary features delayed goals 
and interval arithmetic. It requires Scheme with continuations.
 
["Programming in Prolog", W.F. Clocksin & C.S. Mellish, Springer, 1985].
 
(2001-04-01)
 
  
 
  
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