# detex

DETEX(1)                    General Commands Manual                   DETEX(1)

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

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

DESCRIPTION
and TeX control sequences and writes the remainder on the standard out-
put.   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,

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 argu-
ments 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.  How-
ever, this caused accents in the middle of words to break words, gener-
ating  "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.

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 out-
put.

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)