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+.TH DETEX 1L "12 August 1993" "Purdue University"
+.SH NAME
+detex \- a filter to strip \fITeX\fP commands from a .tex file.
+.SH SYNOPSIS
+.B detex
+[ \fB\-clnstw\fR ] [ \fB\-e\fI environment-list\fR ] [ \fIfilename\fR[.tex] ... ]
+.SH DESCRIPTION
+.I Detex
+(Version 2.6)
+reads each file in sequence, removes all comments and
+.I TeX
+control sequences
+and writes the remainder on the standard output.
+All text in math mode and display mode is removed.
+By default,
+.I detex
+follows \\input commands.
+If a file cannot be opened, a warning message is
+printed and the command is ignored.
+If the
+.B \-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,
+.I detex
+reads from standard input.
+.PP
+If the magic sequence ``\\begin{document}'' appears in the text,
+.I detex
+assumes it is dealing with
+.I LaTeX
+source and
+.I detex
+recognizes additional constructs used in
+.IR LaTeX .
+These include the \\include and \\includeonly commands.
+The
+.B \-l
+option can be used to force
+.I LaTeX
+mode and the
+.B \-t
+option can be used to force
+.I TeX
+mode regardless of input content.
+.PP
+Text in various environment modes of
+.I LaTeX
+is ignored. The default modes are array, eqnarray, equation, figure,
+mathmatica, picture, table and verbatim. The
+.B \-e
+option can be used to specify a comma separated
+.I environment-list
+of environments to ignore. The list replaces the defaults so specifying an
+empty list effectively causes no environments to be ignored.
+.PP
+The
+.B \-c
+option can be used in
+.I 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.
+.PP
+.I Detex
+assumes the standard character classes are being used for
+.IR TeX .
+.I Detex
+allows white space between control sequences
+and magic characters like `{' when recognizing things like
+.I LaTeX
+environments.
+.PP
+If the
+.B \-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 \fB\-w\fR 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.
+.PP
+The TEXINPUTS environment variable is used to find \\input and \\include
+files. Like \fITeX\fP, it interprets a leading or trailing `:' as the default
+TEXINPUTS. It does \fInot\fP support the `//' directory expansion magic sequence.
+.PP
+Detex now handles the basic \fITeX\fP 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.
+.PP
+Note that previous versions of
+.I 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
+.B \-s
+option.
+.SH SEE ALSO
+tex(1L)
+.SH 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.
+.I Detex
+ignores unrecognized option characters after printing a warning message.
+.SH AUTHOR
+Daniel Trinkle, Computer Science Department, Purdue University
+.SH BUGS
+.I Detex
+is not a complete
+.I TeX
+interpreter, so it can be confused by some constructs.
+Most errors result in too much rather than too little output.
+.PP
+Running \fILaTeX\fR
+source without a ``\\begin{document}''
+through \fIdetex\fR may produce
+errors.
+.PP
+Suggestions for improvements are (mildly) encouraged.