What is X? What Opens a X? File Format List from WhatIs.com

File Extension

X File Format

Source code file (Lex)

X is a file extension for a source code file format for Lex. Lex is a program that generates scanners, also known as tokenizers, which recognize lexical patterns in text.  

Lex  performs simple transformations but the program’s main purpose is to facilitate lexical analysis. Lexical analysis is the processing of character sequences such as source code to produce symbol sequences called tokens for use as input to other programs, such as parsers.

Most Unix distributions include a Lex utility that can use an X file to generate a C program.

The X file extension is also used for a file format for AVS image (SDSC Image Tool).

 

Learn more about X files:

Wikipedia has an entry on X files.

See the Unix FAQ at IT Knowledge Exchange.

This was last updated in August 2010
Editorial Director Margaret Rouse

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