214 lines
8.9 KiB
Plaintext
214 lines
8.9 KiB
Plaintext
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LaTeX Project Public License
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============================
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LPPL Version 1.0 1999-03-01
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Copyright 1999 LaTeX3 Project
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but modification is not allowed.
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Preamble
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========
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The LaTeX Project Public License (LPPL) is the license under which the
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base LaTeX distribution is distributed. As described below you may use
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this licence for any software that you wish to distribute.
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It may be particularly suitable if your software is TeX related (such
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as a LaTeX package file) but it may be used for any software, even if
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it is unrelated to TeX.
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To use this license, the files of your distribution should have an
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explicit copyright notice giving your name and the year, together
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with a reference to this license.
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A typical example would be
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%% pig.sty
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%% Copyright 2001 M. Y. Name
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% This program can redistributed and/or modified under the terms
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% of the LaTeX Project Public License Distributed from CTAN
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% archives in directory macros/latex/base/lppl.txt; either
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% version 1 of the License, or (at your option) any later version.
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Given such a notice in the file, the conditions of this document would
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apply, with:
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`The Program` referring to the software `pig.sty` and
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`The Copyright Holder` referring to the person `M. Y. Name`.
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To see a real example, see the file legal.txt which carries the
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copyright notice for the base latex distribution.
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This license gives terms under which files of The Program may be
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distributed and modified. Individual files may have specific further
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constraints on modification, but no file should have restrictions on
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distribution other than those specified below.
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This is to ensure that a distributor wishing to distribute a complete
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unmodified copy of The Program need only check the conditions in this
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file, and does not need to check every file in The Program for extra
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restrictions. If you do need to modify the distribution terms of some
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files, do not refer to this license, instead distribute The Program
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under a different license. You may use the parts of the text of LPPL as
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a model for your own license, but your license should not directly refer
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to the LPPL or otherwise give the impression that The Program is
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distributed under the LPPL.
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The LaTeX Project Public License
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================================
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Terms And Conditions For Copying, Distribution And Modification
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===============================================================
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WARRANTY
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========
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There is no warranty for The Program, to the extent permitted by
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applicable law. Except when otherwise stated in writing, The
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Copyright Holder provides The Program `as is` without warranty of any
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kind, either expressed or implied, including, but not limited to, the
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implied warranties of merchantability and fitness for a particular
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purpose. The entire risk as to the quality and performance of the
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program is with you. Should The Program prove defective, you assume
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the cost of all necessary servicing, repair or correction.
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In no event unless required by applicable law or agreed to in writing
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will The Copyright Holder, or any of the individual authors named in
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the source for The Program, be liable to you for damages, including
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any general, special, incidental or consequential damages arising out
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of any use of The Program or out of inability to use The Program
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(including but not limited to loss of data or data being rendered
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inaccurate or losses sustained by you or by third parties as a result
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of a failure of The Program to operate with any other programs), even
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if such holder or other party has been advised of the possibility of
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such damages.
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DISTRIBUTION
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============
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Redistribution of unchanged files is allowed provided that all files
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that make up the distribution of The Program are distributed.
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In particular this means that The Program has to be distributed
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including its documentation if documentation was part of the original
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distribution.
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The distribution of The Program will contain a prominent file
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listing all the files covered by this license.
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If you receive only some of these files from someone, complain!
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The distribution of changed versions of certain files included in the
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The Program, and the reuse of code from The Program, are allowed
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under the following restrictions:
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* It is allowed only if the legal notice in the file does not
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expressly forbid it.
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See note below, under "Conditions on individual files".
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* You rename the file before you make any changes to it, unless the
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file explicitly says that renaming is not required. Any such changed
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files must be distributed under a license that forbids distribution
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of those files, and any files derived from them, under the names used
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by the original files in the distribution of The Program.
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* You change any `identification string` in The Program to clearly
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indicate that the file is not part of the standard system.
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* If The Program includes an `error report address` so that errors
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may be reported to The Copyright Holder, or other specified
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addresses, this address must be changed in any modified versions of
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The Program, so that reports for files not maintained by the
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original program maintainers are directed to the maintainers of the
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changed files.
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* You acknowledge the source and authorship of the original version
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in the modified file.
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* You also distribute the unmodified version of the file or
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alternatively provide sufficient information so that the
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user of your modified file can be reasonably expected to be
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able to obtain an original, unmodified copy of The Program.
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For example, you may specify a URL to a site that you expect
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will freely provide the user with a copy of The Program (either
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the version on which your modification is based, or perhaps a
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later version).
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* If The Program is intended to be used with, or is based on, LaTeX,
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then files with the following file extensions which have special
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meaning in LaTeX Software, have special modification rules under the
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license:
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- Files with extension `.ins` (installation files): these files may
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not be modified at all because they contain the legal notices
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that are placed in the generated files.
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- Files with extension `.fd` (LaTeX font definitions files): these
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files are allowed to be modified without changing the name, but
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only to enable use of all available fonts and to prevent attempts
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to access unavailable fonts. However, modified files are not
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allowed to be distributed in place of original files.
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- Files with extension `.cfg` (configuration files): these files
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can be created or modified to enable easy configuration of the
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system. The documentation in cfgguide.tex in the base LaTeX
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distribution describes when it makes sense to modify or generate
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such files.
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The above restrictions are not intended to prohibit, and hence do
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not apply to, the updating, by any method, of a file so that it
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becomes identical to the latest version of that file in The Program.
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========================================================================
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NOTES
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=====
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We believe that these requirements give you the freedom you to make
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modifications that conform with whatever technical specifications you
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wish, whilst maintaining the availability, integrity and reliability of
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The Program. If you do not see how to achieve your goal whilst
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adhering to these requirements then read the document cfgguide.tex
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in the base LaTeX distribution for suggestions.
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Because of the portability and exchangeability aspects of systems
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like LaTeX, The LaTeX3 Project deprecates the distribution of
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non-standard versions of components of LaTeX or of generally available
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contributed code for them but such distributions are permitted under the
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above restrictions.
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The document modguide.tex in the base LaTeX distribution details
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the reasons for the legal requirements detailed above.
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Even if The Program is unrelated to LaTeX, the argument in
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modguide.tex may still apply, and should be read before
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a modified version of The Program is distributed.
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Conditions on individual files
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==============================
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The individual files may bear additional conditions which supersede
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the general conditions on distribution and modification contained in
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this file. If there are any such files, the distribution of The
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Program will contain a prominent file that lists all the exceptional
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files.
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Typical examples of files with more restrictive modification
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conditions would be files that contain the text of copyright notices.
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* The conditions on individual files differ only in the
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extent of *modification* that is allowed.
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* The conditions on *distribution* are the same for all the files.
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Thus a (re)distributor of a complete, unchanged copy of The Program
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need meet only the conditions in this file; it is not necessary to
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check the header of every file in the distribution to check that a
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distribution meets these requirements.
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