Files with pl extension are used for the PROLOG programming language.

There are 6 other file types using
the PL file extension!

empty - Harvard palette

empty - Interleaf printerleaf (or WorldView) format file

pl - Perl script language source code

empty - TeX property list font metric file

empty - BRL-CAD 2D and 3D plot file

empty - Fractal Zplot palette

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PL file extension - PROLOG language source code file

What is pl file? How to open pl files?

File type specification:

Source code and script file type icon Source code and script file type

The pl file extension is associated with the PROLOG programming language. The .pl file stores Prolog source code.

Prolog is a logic programming language. It is a general purpose language often associated with artificial intelligence and computational linguistics. It has a purely logical subset, called "pure Prolog", as well as a number of extralogical features.

Having its roots in formal logic, and unlike many other programming languages, Prolog is declarative: The program logic is expressed in terms of relations, and execution is triggered by running queries over these relations. Relations and queries are constructed using Prolog's single data type, the term. Relations are defined by clauses. Given a query, the Prolog engine attempts to find a resolution refutation of the negated query. If the negated query can be refuted, i.e., an instantiation for all free variables is found that makes the union of clauses and the singleton set consisting of the negated query false, it follows that the original query, with the found instantiation applied, is a logical consequence of the program. This makes Prolog (and other logic programming languages) particularly useful for database, symbolic mathematics, and language parsing applications. Because Prolog allows impure predicates, checking the truth value of certain special predicates may have some deliberate side effect, such as printing a value to the screen. This permits the programmer to use some amount of conventional imperative programming when the logical paradigm is inconvenient.

The language was first conceived by a group around Alain Colmerauer in Marseille, France, in the early 1970s, while the first compiler was written by David H. D. Warren in Edinburgh, Scotland. Prolog was one of the first logic programming languages, and remains among the most popular such languages today, with many free and commercial implementations available. While initially aimed at natural language processing, the language has since then stretched far into other areas like theorem proving, expert systems, games, automated answering systems, ontologies and sophisticated control systems, and modern Prolog environments support the creation of graphical user interfaces, as well as administrative and networked applications.

The default software associated to open pl file:

GNU Prolog icon

GNU Prolog  Linux/Unix software

Company or developer:
Daniel Diaz

GNU Prolog is a free Prolog compiler with constraint solving over finite domains developed by Daniel Diaz.

Help how to open:

Plain text use text editor (Notepad).

How to convert:

Currently there is no specific information available, about how to convert this file extension.

For general information try to look at:
Basic info how to convert source code or script files

List of software applications associated to the .pl file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open pl file, edit pl file, convert pl file, view pl file, play pl file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting pl files.

Software that open pl file - PROLOG language source code file

Programs supporting the exension pl on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about GNU Prolog for open pl file action.


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