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202 lines
4.7 KiB
Groff
202 lines
4.7 KiB
Groff
.ig
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ditroff.man
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Last update: 2 Jul 2004
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This file is part of groff, the GNU roff type-setting system.
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Copyright (C) 2001, 2002, 2004 Free Software Foundation, Inc.
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written by Bernd Warken <bwarken@mayn.de>
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maintained by Werner Lemberg <wl@gnu.org>
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.1 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being this .ig-section and AUTHORS, with no
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Front-Cover Texts, and with no Back-Cover Texts.
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A copy of the Free Documentation License is included as a file called
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FDL in the main directory of the groff source package.
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..
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.
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.\" --------------------------------------------------------------------
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.\" Setup
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.\" --------------------------------------------------------------------
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.
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.mso www.tmac
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.
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.if n \{\
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. mso tty-char.tmac
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. ftr CR R
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. ftr CI I
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. ftr CB B
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.\}
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.
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.if '\*[.T]'dvi' \
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. ftr CB CW
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.
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.
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.\" --------------------------------------------------------------------
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.\" Title
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.\" --------------------------------------------------------------------
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.
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.TH DITROFF @MAN7EXT@ "@MDATE@" "Groff Version @VERSION@"
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.SH NAME
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ditroff \- classical device independent roff
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.
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.
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.\" --------------------------------------------------------------------
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.SH DESCRIPTION
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.\" --------------------------------------------------------------------
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.
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The name
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.I ditroff
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once marked a development level of the
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.I troff
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text processing system.
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.
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In actual
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.BR roff (@MAN7EXT@)
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systems, the name
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.I troff
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is used as a synonym for
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.IR ditroff .
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.
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.P
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The first roff system was written by Joe Osanna around 1973.
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.
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It supported only two output devices, the
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.B nroff
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program produced text oriented tty output, while the
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.B troff
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program generated graphical output for exactly one output device, the Wang
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.I Graphic Systems CAT
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typesetter.
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.
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.P
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In 1979, Brian Kernighan rewrote troff to support more devices by
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creating an intermediate output format for troff that can be fed into
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postprocessor programs which actually do the printout on the device.
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.
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Kernighan's version marks what is known as
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.I classical troff
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today.
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.
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In order to distinguish it from Osanna's original mono-device version,
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it was called
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.I ditroff
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(\c
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.IR d\/ evice\~ i\/ ndependent\~ troff\/\c
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)
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on some systems, though this naming isn't mentioned in the classical
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documentation.
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.
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.P
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Today, any existing roff system is based on Kernighan's multi-device
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troff.
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.
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The distinction between
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.I troff
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and
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.I ditroff
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isn't necessary any longer, for each modern
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.I troff
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provides already the complete functionality of
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.IR ditroff .
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.
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On most systems, the name
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.I troff
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is used to denote
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.IR ditroff .
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.
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.P
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The easiest way to use ditroff is the GNU roff system,
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.IR groff .
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The
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.BR groff (@MAN1EXT@)
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program is a wrapper around
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.I (di)troff
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that automatically handles postprocessing.
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.
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.
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.\" --------------------------------------------------------------------
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.SH "SEE ALSO"
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.\" --------------------------------------------------------------------
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.
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.TP
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.I [CSTR\~#54]
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The 1992 revision of the
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.I Nroff/Troff User's Manual
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by
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.I J. F. Osanna
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and
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.IR "Brian Kernighan" ,
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see
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.br
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.URL http://\:cm.bell-labs.com/\:cm/\:cs/\:cstr/\:54.ps.gz \
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"Bell Labs CSTR\~#54" .
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.
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.TP
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.I [CSTR\~#97]
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.I A Typesetter-independent TROFF
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by
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.I Brian Kernighan
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is the original documentation of the first multi-device troff
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.RI ( ditroff\/ ),
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see
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.br
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.URL http://\:cm.bell-labs.com/\:cm/\:cs/\:cstr/\:97.ps.gz \
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"Bell Labs CSTR\~#97" .
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.
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.TP
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.BR roff (@MAN7EXT@)
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This document gives details on the history and concepts of roff.
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.
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.TP
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.BR @g@troff (@MAN1EXT@)
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The actual implementation of
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.IR ditroff .
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.
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.TP
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.BR groff (@MAN1EXT@)
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The GNU roff program and pointers to all documentation around groff.
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.
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.TP
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.BR groff_out (@MAN5EXT@)
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The groff version of the intermediate output language, the basis for
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multi-devicing.
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.
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.
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.\" --------------------------------------------------------------------
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.SH "AUTHORS"
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.\" --------------------------------------------------------------------
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.
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Copyright (C) 2001, 2002, 2004 Free Software Foundation, Inc.
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.
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.P
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This document is distributed under the terms of the FDL (GNU Free
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Documentation License) version 1.1 or later.
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.
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You should have received a copy of the FDL on your system, it is also
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available on-line at the
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.URL http://\:www.gnu.org/\:copyleft/\:fdl.html "GNU copyleft site" .
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.
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.P
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This document is part of
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.IR groff ,
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the GNU roff distribution.
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.
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It was written by
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.MTO bwarken@mayn.de "Bernd Warken"
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and is maintained by
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.MTO wl@gnu.org "Werner Lemberg" .
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.
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.
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.\" --------------------------------------------------------------------
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.\" Emacs settings
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.\" --------------------------------------------------------------------
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.\"
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.\" Local Variables:
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.\" mode: nroff
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.\" End:
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