Unlike the original implementations of Prolog, it has a separate compilation phase, rather than being directly interpreted, which allows a much wider range of errors to be caught before running a program.

It has a purely logical subset, called " pure Prolog ", as well as a number of extralogical features.

At the other end of the spectrum, pure Prolog has none at all.

This design became known as the Warren Abstract Machine ( WAM ) and has become the < i > de facto </ i > standard target for Prolog compilers.

Reification, at least partially, has been experienced in many languages to date: in early Lisp dialects and in current Prolog dialects, programs have been treated as data, although the causal connection has often been left to the responsibility of the programmer.

Note, however, that Prolog uses the so-called negation as failure: when the interpreter has to evaluate the atom, it tries to prove that is true, and conclude that is true if it fails.

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

The core of Visual Prolog are Horn clauses, pattern matching and controlled non-determinism like in traditional Prolog, but unlike traditional Prolog, Visual Prolog has always been strongly and statically typed.

* 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.

Negation as failure has been an important feature of logic programming since the earliest days of both Planner and Prolog.

There are also languages, such as Haskell, Prolog and Go, in which the capitalization of an identifier encodes information about its semantics.

Non-backtracking Prolog code can be considered explicit single-assignment, explicit in a sense that its ( named ) variables can be in explicitly unassigned state, or be set exactly once.

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.

It was founded in 1980 and is most widely known for its Prolog compilers such as WIN-PROLOG.

In 1992, LPA helped set up the Prolog Vendors Group, a non-profit organization whose aim was to help promote Prolog by making people aware of its usage in industry.

The formalism is quite similar to Prolog, to the extent that it borrowed its cut operator.

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.

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

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

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.

Mercury is based on the logic programming language Prolog.

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

Prolog is a general purpose logic programming language associated with artificial intelligence and computational linguistics.

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.

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

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.

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

A benefit of these constraints is that datalog queries on finite sets always terminate ( unlike Prolog programs ).

Another is that statements and predicates of a program can be stated in any order ( unlike Prolog ).

The computational process employed in the design of many answer set solvers is an enhancement of the DPLL algorithm and, in principle, it always terminates ( unlike Prolog query evaluation, which may lead to an infinite loop ).

For this reason, a comparatively small set of library predicates suffices for many Prolog programs.

Prolog is by far the most popular host language and CHR is included in many Prolog implementations, including SICStus and SWI-Prolog.

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

% in other Prolog environments or using other constraint solvers.

On the other hand, asking the Prolog system the following:

Since all three modules were implemented as Prolog programs, it would then in principle be possible to put this structure backwards through the corresponding modules for another language to produce a translated text in any of the other languages.

This capability is not typically available in other logical programming languages such as Prolog.

The most common host languages are Prolog, C ++, and Java, but other languages have been used as well.

Partly because it is based on Prolog, there is little support from other programs for reading the Tgif file format.

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.

In pure Prolog, NAF literals of the form can occur in the body of clauses and can be used to derive other NAF literals.

To simplify porting tasks, compatibility libraries for ISO Prolog and other Prolog dialects ( C-Prolog, Quintus, SICStus, SWI-Prolog ) are provided.