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PL

Type: Developer Files

Acronym: Perl Script

Opens With: Perl, any text editor

Script written in Perl that is compiled and run using a Perl interpreter; contains lines of Perl program code with variables, operations, functions, and comments; may be difficult to read due to the brief and compact nature of the Perl language syntax.

PL scripts are commonly used to create programs that parse text using regular expressions, but they also are used for a wide variety of other applications, including server scripting and Web server CGI scripts.

PL files typically start with the line #!/usr/local/bin/perl, which tells the computer to run the script using the installed Perl interpreter.


Generic

Type: Developer Files

Acronym: Prolog Source Code File

Opens With: SWI-Prolog, Strawberry Prolog, PDC Visual Prolog

Contains program source code written in Prolog, a declarative programming language often used for artificial intelligence applications and teaching purposes; can be edited with a text editor and compiled with a Prolog interpreter.

Prolog is an abbreviation for "Programmation en Logique."


Generic

Type: Vector Image Files

Acronym: Unix Color Plot File

Opens With: BRL-CAD

2D or 3D image plot created with BRL-CAD, a combinatorial Constructive Solid Geometry (CSG) solid modeling system; typically generated with MGED (Multi-Device Geometry Editor), included in the BRL-CAD software package.

NOTE: PL files can be converted to standard .PNG image files using BRL-CAD's pl-fb and fb-png commands.

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