forked from mirror/gitea
296 lines
14 KiB
Groff
296 lines
14 KiB
Groff
The LaTeX Project Public License
|
|
|
|
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
|
|
|
|
LPPL Version 1.2 1999-09-03 Copyright 1999 LaTeX3 Project
|
|
|
|
Everyone is allowed to distribute verbatim copies of this license document,
|
|
but modification of it is not allowed.
|
|
|
|
PREAMBLE
|
|
|
|
========
|
|
|
|
The LaTeX Project Public License (LPPL) is the license under which the base
|
|
LaTeX distribution is distributed.
|
|
|
|
You may use this license for any program that you have written and wish to
|
|
distribute. This license may be particularly suitable if your program is TeX-related
|
|
(such as a LaTeX package), but you may use it even if your program is unrelated
|
|
to TeX. The section `WHETHER AND HOW TO DISTRIBUTE PROGRAMS UNDER THIS LICENSE',
|
|
below, gives instructions, examples, and recommendations for authors who are
|
|
considering distributing their programs under this license.
|
|
|
|
In this license document, `The Program' refers to any program distributed
|
|
under this license.
|
|
|
|
This license gives conditions under which The Program may be distributed and
|
|
conditions under which modified versions of The Program may be distributed.
|
|
Individual files of The Program may bear supplementary and/or superseding
|
|
conditions on modification of themselves and on the distribution of modified
|
|
versions of themselves, but *no* file of The Program may bear supplementary
|
|
or superseding conditions on the distribution of an unmodified copy of the
|
|
file. A distributor wishing to distribute a complete, unmodified copy of The
|
|
Program therefore needs to check the conditions only in this license and nowhere
|
|
else.
|
|
|
|
Activities other than distribution and/or modification of The Program are
|
|
not covered by this license; they are outside its scope. In particular, the
|
|
act of running The Program is not restricted.
|
|
|
|
We, the LaTeX3 Project, believe that the conditions below give you the freedom
|
|
to make and distribute modified versions of The Program that conform with
|
|
whatever technical specifications you wish while maintaining the availability,
|
|
integrity, and reliability of The Program. If you do not see how to achieve
|
|
your goal while meeting these conditions, then read the document `cfgguide.tex'
|
|
in the base LaTeX distribution for suggestions.
|
|
|
|
CONDITIONS ON DISTRIBUTION AND MODIFICATION
|
|
|
|
===========================================
|
|
|
|
You may distribute a complete, unmodified copy of The Program. Distribution
|
|
of only part of The Program is not allowed.
|
|
|
|
You may not modify in any way a file of The Program that bears a legal notice
|
|
forbidding modification of that file.
|
|
|
|
You may distribute a modified file of The Program if, and only if, the following
|
|
eight conditions are met:
|
|
|
|
1. You must meet any additional conditions borne by the file on the distribution
|
|
of a modified version of the file as described below in the subsection `Additional
|
|
Conditions on Individual Files of The Program'.
|
|
|
|
2. If the file is a LaTeX software file, then you must meet any applicable
|
|
additional conditions on the distribution of a modified version of the file
|
|
that are described below in the subsection `Additional Conditions on LaTeX
|
|
Software Files'.
|
|
|
|
3. You must not distribute the modified file with the filename of the original
|
|
file.
|
|
|
|
4. In the modified file, you must acknowledge the authorship and name of the
|
|
original file, and the name (if any) of the program which contains it.
|
|
|
|
5. You must change any identification string in the file to indicate clearly
|
|
that the modified file is not part of The Program.
|
|
|
|
6. You must change any addresses in the modified file for the reporting of
|
|
errors in the file or in The Program generally to ensure that reports for
|
|
files no longer maintained by the original maintainers will be directed to
|
|
the maintainers of the modified files.
|
|
|
|
7. You must distribute the modified file under a license that forbids distribution
|
|
both of the modified file and of any files derived from the modified file
|
|
with the filename of the original file.
|
|
|
|
8. You must do either (A) or (B):
|
|
|
|
(A) distribute a copy of The Program (that is, a complete, unmodified copy
|
|
of The Program) together with the modified file; if your distribution of the
|
|
modified file is made by offering access to copy the modified file from a
|
|
designated place, then offering equivalent access to copy The Program from
|
|
the same place meets this condition, even though third parties are not compelled
|
|
to copy The Program along with the modified file;
|
|
|
|
(B) provide to those who receive the modified file information that is sufficient
|
|
for them to obtain a copy of The Program; for example, you may provide a Uniform
|
|
Resource Locator (URL) for a site that you expect will provide them with a
|
|
copy of The Program free of charge (either the version from which your modification
|
|
is derived, or perhaps a later version).
|
|
|
|
Note that in the above, `distribution' of a file means making the file available
|
|
to others by any means. This includes, for instance, installing the file on
|
|
any machine in such a way that the file is accessible by users other than
|
|
yourself. `Modification' of a file means any procedure that produces a derivative
|
|
file under any applicable law -- that is, a file containing the original file
|
|
or a significant portion of it, either verbatim or with modifications and/or
|
|
translated into another language.
|
|
|
|
Changing the name of a file (other than as necessitated by the file conventions
|
|
of the target file systems) is considered to be a modification of the file.
|
|
|
|
The distribution conditions in this license do not have to be applied to files
|
|
that have been modified in accordance with the above conditions. Note, however,
|
|
that Condition 7. does apply to any such modified file.
|
|
|
|
The conditions above are not intended to prohibit, and hence do not apply
|
|
to, the updating, by any method, of a file so that it becomes identical to
|
|
the latest version of that file of The Program.
|
|
|
|
A Recommendation on Modification Without Distribution -----------------------------------------------------
|
|
|
|
It is wise never to modify a file of The Program, even for your own personal
|
|
use, without also meeting the above eight conditions for distributing the
|
|
modified file. While you might intend that such modified files will never
|
|
be distributed, often this will happen by accident -- you may forget that
|
|
you have modified the file; or it may not occur to you when allowing others
|
|
to access the modified file that you are thus distributing it and violating
|
|
the conditions of this license. It is usually in your best interest to keep
|
|
your copy of The Program identical with the public one. Many programs provide
|
|
ways to control the behavior of that program without altering its licensed
|
|
files.
|
|
|
|
Additional Conditions on Individual Files of The Program --------------------------------------------------------
|
|
|
|
An individual file of The Program may bear additional conditions that supplement
|
|
and/or supersede the conditions in this license if, and only if, such additional
|
|
conditions exclusively concern modification of the file or distribution of
|
|
a modified version of the file. The conditions on individual files of The
|
|
Program therefore may differ only with respect to the kind and extent of modification
|
|
of those files that is allowed, and with respect to the distribution of modified
|
|
versions of those files.
|
|
|
|
Additional Conditions on LaTeX Software Files
|
|
|
|
---------------------------------------------
|
|
|
|
If a file of The Program is intended to be used with LaTeX (that is, if it
|
|
is a LaTeX software file), then the following additional conditions, which
|
|
supplement and/or supersede the conditions above, apply to the file according
|
|
to its filename extension:
|
|
|
|
- You may not modify any file with filename extension `.ins' since these are
|
|
installation files containing the legal notices that are placed in the files
|
|
they generate.
|
|
|
|
- You may distribute modified versions of files with filename extension `.fd'
|
|
(LaTeX font definition files) under the standard conditions of the LPPL as
|
|
described above. You may also distribute such modified LaTeX font definition
|
|
files with their original names provided that:
|
|
|
|
(1) the only changes to the original files either enable use of available
|
|
fonts or prevent attempts to access unavailable fonts;
|
|
|
|
(2) you also distribute the original, unmodified files (TeX input paths can
|
|
be used to control which set of LaTeX font definition files is actually used
|
|
by TeX).
|
|
|
|
- You may distribute modified versions of files with filename extension `.cfg'
|
|
(configuration files) with their original names. The Program may (and usually
|
|
will) specify the range of commands that are allowed in a particular configuration
|
|
file.
|
|
|
|
Because of portability and exchangeability issues in LaTeX software, The LaTeX3
|
|
Project deprecates the distribution of modified versions of components of
|
|
LaTeX or of generally available contributed code for them, but such distribution
|
|
can meet the conditions of this license.
|
|
|
|
NO WARRANTY
|
|
|
|
===========
|
|
|
|
There is no warranty for The Program. Except when otherwise stated in writing,
|
|
The Copyright Holder provides The Program `as is', without warranty of any
|
|
kind, either expressed or implied, including, but not limited to, the implied
|
|
warranties of merchantability and fitness for a particular purpose. The entire
|
|
risk as to the quality and performance of The Program is with you. Should
|
|
The Program prove defective, you assume the cost of all necessary servicing,
|
|
repair, or correction.
|
|
|
|
In no event unless agreed to in writing will The Copyright Holder, or any
|
|
author named in the files of The Program, or any other party who may distribute
|
|
and/or modify The Program as permitted above, be liable to you for damages,
|
|
including any general, special, incidental or consequential damages arising
|
|
out of any use of The Program or out of inability to use The Program (including,
|
|
but not limited to, loss of data, data being rendered inaccurate, or losses
|
|
sustained by anyone as a result of any failure of The Program to operate with
|
|
any other programs), even if The Copyright Holder or said author or said other
|
|
party has been advised of the possibility of such damages.
|
|
|
|
WHETHER AND HOW TO DISTRIBUTE PROGRAMS UNDER THIS LICENSE =========================================================
|
|
|
|
This section contains important instructions, examples, and recommendations
|
|
for authors who are considering distributing their programs under this license.
|
|
These authors are addressed as `you' in this section.
|
|
|
|
Choosing This License or Another License
|
|
|
|
----------------------------------------
|
|
|
|
If for any part of your program you want or need to use *distribution* conditions
|
|
that differ from those in this license, then do not refer to this license
|
|
anywhere in your program but instead distribute your program under a different
|
|
license. You may use the text of this license as a model for your own license,
|
|
but your license should not refer to the LPPL or otherwise give the impression
|
|
that your program is distributed under the LPPL.
|
|
|
|
The document `modguide.tex' in the base LaTeX distribution explains the motivation
|
|
behind the conditions of this license. It explains, for example, why distributing
|
|
LaTeX under the GNU General Public License (GPL) was considered inappropriate.
|
|
Even if your program is unrelated to LaTeX, the discussion in `modguide.tex'
|
|
may still be relevant, and authors intending to distribute their programs
|
|
under any license are encouraged to read it.
|
|
|
|
How to Use This License
|
|
|
|
-----------------------
|
|
|
|
To use this license, place in each of the files of your program both an explicit
|
|
copyright notice including your name and the year and also a statement that
|
|
the distribution and/or modification of the file is constrained by the conditions
|
|
in this license.
|
|
|
|
Here is an example of such a notice and statement:
|
|
|
|
%% pig.dtx
|
|
|
|
%% Copyright 2001 M. Y. Name
|
|
|
|
%
|
|
|
|
% This program may be distributed and/or modified under the
|
|
|
|
% conditions of the LaTeX Project Public License, either version 1.2
|
|
|
|
% of this license or (at your option) any later version.
|
|
|
|
% The latest version of this license is in
|
|
|
|
% http://www.latex-project.org/lppl.txt
|
|
|
|
% and version 1.2 or later is part of all distributions of LaTeX
|
|
|
|
% version 1999/12/01 or later.
|
|
|
|
%
|
|
|
|
% This program consists of the files pig.dtx and pig.ins
|
|
|
|
Given such a notice and statement in a file, the conditions given in this
|
|
license document would apply, with `The Program' referring to the two files
|
|
`pig.dtx' and `pig.ins', and `The Copyright Holder' referring to the person
|
|
`M. Y. Name'.
|
|
|
|
Important Recommendations
|
|
|
|
-------------------------
|
|
|
|
Defining What Constitutes The Program
|
|
|
|
The LPPL requires that distributions of The Program contain all the files
|
|
of The Program. It is therefore important that you provide a way for the licensee
|
|
to determine which files constitute The Program. This could, for example,
|
|
be achieved by explicitly listing all the files of The Program near the copyright
|
|
notice of each file or by using a line like
|
|
|
|
% This program consists of all files listed in manifest.txt.
|
|
|
|
in that place. In the absence of an unequivocal list it might be impossible
|
|
for the licensee to determine what is considered by you to comprise The Program.
|
|
|
|
Noting Exceptional Files If The Program contains any files bearing additional
|
|
conditions on modification, or on distribution of modified versions, of those
|
|
files (other than those listed in `Additional Conditions on LaTeX Software
|
|
Files'), then it is recommended that The Program contain a prominent file
|
|
that defines the exceptional conditions, and either lists the exceptional
|
|
files or defines one or more categories of exceptional files.
|
|
|
|
Files containing the text of a license (such as this file) are often examples
|
|
of files bearing more restrictive conditions on modification. LaTeX configuration
|
|
files (with filename extension `.cfg') are examples of files bearing less
|
|
restrictive conditions on the distribution of a modified version of the file.
|
|
The additional conditions on LaTeX software given above are examples of declaring
|
|
a category of files bearing exceptional additional conditions.
|