NAME

       detex - a filter to strip TeX commands from a .tex file.

SYNOPSIS

       detex [ -clnstw ] [ -e environment-list ] [ filename[.tex] ... ]

DESCRIPTION

       Detex  (Version  2.6)  reads  each  file  in sequence, removes all comments and TeX control sequences and
       writes the remainder on the standard output.  All text in math mode and  display  mode  is  removed.   By
       default, detex follows \input commands.  If a file cannot be opened, a warning message is printed and the
       command  is  ignored.   If the -n option is used, no \input or \include commands will be processed.  This
       allows single file processing.  If no input file is given on the command line, detex reads from  standard
       input.

       If  the  magic  sequence ``\begin{document}'' appears in the text, detex assumes it is dealing with LaTeX
       source and detex recognizes additional  constructs  used  in  LaTeX.   These  include  the  \include  and
       \includeonly  commands.   The  -l option can be used to force LaTeX mode and the -t option can be used to
       force TeX mode regardless of input content.

       Text in various environment modes of LaTeX is ignored.  The default modes are array, eqnarray,  equation,
       figure,  mathmatica, picture, table and verbatim.  The -e option can be used to specify a comma separated
       environment-list of environments to ignore.  The list replaces the defaults so specifying an  empty  list
       effectively causes no environments to be ignored.

       The  -c  option  can  be used in LaTeX mode to have detex echo the arguments to \cite, \ref, and \pageref
       macros.  This can be useful when sending the output to a style checker.

       Detex assumes the standard character classes are being used for TeX.  Detex allows  white  space  between
       control sequences and magic characters like `{' when recognizing things like LaTeX environments.

       If  the  -w  flag  is  given,  the  output  is a word list, one `word' (string of two or more letters and
       apostrophes beginning with a letter) per line, and all other characters ignored.  Without -w  the  output
       follows  the  original,  with  the  deletions  mentioned  above.   Newline characters are preserved where
       possible so that the lines of output match the input as closely as possible.

       The TEXINPUTS environment variable is used to find \input and \include files.  Like TeX, it interprets  a
       leading or trailing `:' as the default TEXINPUTS.  It does not support the `//' directory expansion magic
       sequence.

       Detex  now  handles  the  basic  TeX ligatures as a special case, replacing the ligatures with acceptable
       charater substitutes.  This eliminates spelling errors introduced by merely removing them.  The ligatures
       are \aa, \ae, \oe, \ss, \o, \l (and their upper-case equivalents).  The special "dotless"  characters  \i
       and \j are also replaced with i and j respectively.

       Note  that  previous  versions of detex would replace control sequences with a space character to prevent
       words from running together.  However, this caused accents  in  the  middle  of  words  to  break  words,
       generating  "spelling  errors"  that were not desirable.  Therefore, the new version merely removes these
       accents.  The old functionality can be essentially duplicated by using the -s option.

SEE ALSO

       tex(1L)

DIAGNOSTICS

       Nesting of \input is allowed but the number of opened files must not exceed the  system's  limit  on  the
       number  of  simultaneously  opened  files.  Detex ignores unrecognized option characters after printing a
       warning message.

AUTHOR

       Daniel Trinkle, Computer Science Department, Purdue University

BUGS

       Detex is not a complete TeX interpreter, so it can be confused by some constructs.  Most errors result in
       too much rather than too little output.

       Running LaTeX source without a ``\begin{document}'' through detex may produce errors.

       Suggestions for improvements are (mildly) encouraged.

Purdue University                                12 August 1993                                         DETEX(1)