The French Prolog computer language, designed in 1972, marks a real advance over expert systems like Dendral or Mycin: it is a shell, that is to say a software structure ready to receive any expert system and to run it.

However Prolog is not particularly user friendly and is an order of logic away from human logic.

This is the case of the Mycin and Dendral expert systems, and of, for example, fuzzy logic, predicate logic ( Prolog ), symbolic logic and mathematical logic.

Kernel Language 0 ( KL0 ) is a sequential logic programming language based on Prolog, used in the ICOT Fifth generation computer project.

KL1 is an implementation of Flat GHC ( a subset of the Guarded Horn Clauses language by Kazunori Ueda ), making it a parallelised Prolog variant.

It is related to both Prolog and Haskell.

Mercury is based on the logic programming language Prolog.

Mercury is a purely declarative language, unlike Prolog, since it lacks " extra-logical " Prolog statements such as " cut " and imperative I / O.

In languages such as Prolog, mutual recursion is almost unavoidable.

Prolog has its roots in first-order logic, a formal logic, and unlike many other programming languages, Prolog is declarative: the program logic is expressed in terms of relations, represented as facts and rules.

In Prolog, program logic is expressed in terms of relations, and a computation is initiated by running a query over these relations.

Pure Prolog is restricted to Horn clauses.

Execution of a Prolog program is initiated by the user's posting of a single goal, called the query.

The resolution method used by Prolog is called SLD resolution.

Pure Prolog logic is expressed in terms of relations, and execution is triggered by running queries over these relations.

There is also a sample algorithm written in Prolog.

As a general purpose language, Prolog also provides various built-in predicates to perform routine activities like input / output, using graphics and otherwise communicating with the operating system.

* Prolog: a general purpose logic programming language.

The Prolog subset of Poplog is implemented using the extendable incremental compiler of POP-11, the core language of Poplog, which is a general purpose Lisp-like language with a more conventional syntax.

Constraint programming originated from a formalization of equalities of terms in Prolog II, leading to a general framework for embedding constraints into a logic programming language.

The purpose of compiling Prolog code to the more low-level WAM code is to make subsequent interpretation of the Prolog program more efficient.

Prolog developed in 1972, but popularized much later, represents propositions and basic logic, and can derive conclusions from known premises.

Prolog gave rise to the programming languages ALF, Fril, Gödel, Mercury, Oz, Ciao, Visual Prolog, XSB, and λProlog, as well as a variety of concurrent logic programming languages ( see Shapiro ( 1989 ) for a survey ), constraint logic programming languages and datalog.

* Prolog, designed in 1972, was the first logic programming language.

Prolog was one of the first logic programming languages, and remains the most popular among such languages today, with many free and commercial implementations available.

This makes Prolog ( and other logic programming languages ) particularly useful for database, symbolic mathematics, and language parsing applications.

SNOBOL4 pattern-matching uses a backtracking algorithm similar to that used in the logic programming language Prolog, which provides pattern-like constructs via DCGs.

; Poplog: Poplog implements a version of CL, with POP-11, and optionally Prolog, and Standard ML ( SML ), allowing mixed language programming.

The initial version of Erlang was implemented in Prolog and was influenced by the programming language PLEX used in earlier Ericsson exchanges.

Category: Prolog programming language family

Category: Prolog programming language family

Kowalski collaborated with Colmerauer in Marseille, who developed these ideas in the design and implementation of the programming language Prolog.

The programming language Prolog was developed in 1972 by Alain Colmerauer.

The use of Prolog as a practical programming language was given great momentum by the development of a compiler by David Warren in Edinburgh in 1977.

Experiments demonstrated that Edinburgh Prolog could compete with the processing speed of other symbolic programming languages such as Lisp.

** Logic programming languages such as Prolog.

* YAP – Yet Another Prolog, an implementation of the Prolog programming language

* A reference or model implementation, sometimes written in the language being specified ( e. g., Prolog or ANSI REXX ).

The language was first conceived by a group around Alain Colmerauer in Marseille, France, in the early 1970s and the first Prolog system was developed in 1972 by Colmerauer with Philippe Roussel.

Colmerauer, with Philippe Roussel, used this dual interpretation of clauses as the basis of Prolog, which was implemented in the summer and autumn of 1972.

It can ostensibly be viewed as a pure subset of Prolog with strong types and modes.

Chris Mellish helped with the initial Prolog implementation in POP-11.

* Automated reasoning – Solving engines, such as used in Prolog, which produce steps to a result given a query on a fact and rule database, and automated theorem provers that aim to prove mathematical theorems with some assistance from a programmer.

In fact, the resolution of a goal clause with a definite clause to produce a new goal clause is the basis of the SLD resolution inference rule, used to implement logic programming and the programming language Prolog.

The SEL compiler, written in Quintus Prolog, generates WAM-like code, extended to deal with set-matching, memoisation, and the novel control structure of the language.

For example, the computer language Prolog uses a sort of default assumption when dealing with negation: if a negative atom cannot be proved to be true, then it is assumed to be false.

The existence of the compiler and all its subroutines at run time made it possible to support far richer language extensions than were possible with Macros, and as a result Pop-11 was used ( by Steve Hardy, Chris Mellish and John Gibson )) to produce an implementation of Prolog, using the standard syntax of Prolog, and the combined system became known as Poplog, to which Common Lisp and Standard ML were later added.

Although XPCE was designed to be language-independent, it has gained popularity most with Prolog.

OSS was involved with other projects, such as a modified BASIC and DOS for the Atari 7800 game system, Personal Pascal and Personal Prolog for the Atari ST, and others.

* Special predicates: In Prolog, programmers can directly influence the procedural evaluation of the program with special predicates such as the cut, this has no correspondence in deductive databases.

In it, a database of facts ( a la Prolog ) is augmented with a set of procedures called demons.

These started with Prolog with Freeze and IC Prolog, and became a true concurrency primitive with Relational Language, Concurrent Prolog, Guarded Horn Clauses ( GHC ), Parlog, Vulcan, Janus, Mozart / Oz, Flow Java, and Alice ML.