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