LaTeX Project Public License v1.0

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LaTeX Project Public License v1.0

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  • Notes

    This license was released 1 Mar 1999


    LaTeX Project Public License

    LPPL Version 1.0 1999-03-01

    Copyright 1999 LaTeX3 Project
    Everyone is permitted to copy and distribute verbatim copies
    of this license document, but modification is not allowed.


    The LaTeX Project Public License (LPPL) is the license under which the
    base LaTeX distribution is distributed. As described below you may use
    this licence for any software that you wish to distribute.

    It may be particularly suitable if your software is TeX related (such
    as a LaTeX package file) but it may be used for any software, even if
    it is unrelated to TeX.

    To use this license, the files of your distribution should have an
    explicit copyright notice giving your name and the year, together
    with a reference to this license.

    A typical example would be

    %% pig.sty
    %% Copyright 2001 M. Y. Name

    % This program can redistributed and/or modified under the terms
    % of the LaTeX Project Public License Distributed from CTAN
    % archives in directory macros/latex/base/lppl.txt; either
    % version 1 of the License, or (at your option) any later version.

    Given such a notice in the file, the conditions of this document would
    apply, with:

    `The Program' referring to the software `pig.sty' and
    `The Copyright Holder' referring to the person `M. Y. Name'.

    To see a real example, see the file legal.txt which carries the
    copyright notice for the base latex distribution.

    This license gives terms under which files of The Program may be
    distributed and modified. Individual files may have specific further
    constraints on modification, but no file should have restrictions on
    distribution other than those specified below.
    This is to ensure that a distributor wishing to distribute a complete
    unmodified copy of The Program need only check the conditions in this
    file, and does not need to check every file in The Program for extra
    restrictions. If you do need to modify the distribution terms of some
    files, do not refer to this license, instead distribute The Program
    under a different license. You may use the parts of the text of LPPL as
    a model for your own license, but your license should not directly refer
    to the LPPL or otherwise give the impression that The Program is
    distributed under the LPPL.

    The LaTeX Project Public License
    Terms And Conditions For Copying, Distribution And Modification


    There is no warranty for The Program, to the extent permitted by
    applicable law. 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 required by applicable law or agreed to in writing
    will The Copyright Holder, or any of the individual authors named in
    the source for The Program, 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 or data being rendered
    inaccurate or losses sustained by you or by third parties as a result
    of a failure of The Program to operate with any other programs), even
    if such holder or other party has been advised of the possibility of
    such damages.


    Redistribution of unchanged files is allowed provided that all files
    that make up the distribution of The Program are distributed.
    In particular this means that The Program has to be distributed
    including its documentation if documentation was part of the original

    The distribution of The Program will contain a prominent file
    listing all the files covered by this license.

    If you receive only some of these files from someone, complain!

    The distribution of changed versions of certain files included in the
    The Program, and the reuse of code from The Program, are allowed
    under the following restrictions:

    * It is allowed only if the legal notice in the file does not
    expressly forbid it.
    See note below, under "Conditions on individual files".

    * You rename the file before you make any changes to it, unless the
    file explicitly says that renaming is not required. Any such changed
    files must be distributed under a license that forbids distribution
    of those files, and any files derived from them, under the names used
    by the original files in the distribution of The Program.

    * You change any `identification string' in The Program to clearly
    indicate that the file is not part of the standard system.

    * If The Program includes an `error report address' so that errors
    may be reported to The Copyright Holder, or other specified
    addresses, this address must be changed in any modified versions of
    The Program, so that reports for files not maintained by the
    original program maintainers are directed to the maintainers of the
    changed files.

    * You acknowledge the source and authorship of the original version
    in the modified file.

    * You also distribute the unmodified version of the file or
    alternatively provide sufficient information so that the
    user of your modified file can be reasonably expected to be
    able to obtain an original, unmodified copy of The Program.
    For example, you may specify a URL to a site that you expect
    will freely provide the user with a copy of The Program (either
    the version on which your modification is based, or perhaps a
    later version).

    * If The Program is intended to be used with, or is based on, LaTeX,
    then files with the following file extensions which have special
    meaning in LaTeX Software, have special modification rules under the

    - Files with extension `.ins' (installation files): these files may
    not be modified at all because they contain the legal notices
    that are placed in the generated files.

    - Files with extension `.fd' (LaTeX font definitions files): these
    files are allowed to be modified without changing the name, but
    only to enable use of all available fonts and to prevent attempts
    to access unavailable fonts. However, modified files are not
    allowed to be distributed in place of original files.

    - Files with extension `.cfg' (configuration files): these files
    can be created or modified to enable easy configuration of the
    system. The documentation in cfgguide.tex in the base LaTeX
    distribution describes when it makes sense to modify or generate
    such files.

    The above restrictions 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 in The Program.



    We believe that these requirements give you the freedom you to make
    modifications that conform with whatever technical specifications you
    wish, whilst maintaining the availability, integrity and reliability of
    The Program. If you do not see how to achieve your goal whilst
    adhering to these requirements then read the document cfgguide.tex
    in the base LaTeX distribution for suggestions.

    Because of the portability and exchangeability aspects of systems
    like LaTeX, The LaTeX3 Project deprecates the distribution of
    non-standard versions of components of LaTeX or of generally available
    contributed code for them but such distributions are permitted under the
    above restrictions.

    The document modguide.tex in the base LaTeX distribution details
    the reasons for the legal requirements detailed above.
    Even if The Program is unrelated to LaTeX, the argument in
    modguide.tex may still apply, and should be read before
    a modified version of The Program is distributed.

    Conditions on individual files

    The individual files may bear additional conditions which supersede
    the general conditions on distribution and modification contained in
    this file. If there are any such files, the distribution of The
    Program will contain a prominent file that lists all the exceptional

    Typical examples of files with more restrictive modification
    conditions would be files that contain the text of copyright notices.

    * The conditions on individual files differ only in the
    extent of *modification* that is allowed.

    * The conditions on *distribution* are the same for all the files.
    Thus a (re)distributor of a complete, unchanged copy of The Program
    need meet only the conditions in this file; it is not necessary to
    check the header of every file in the distribution to check that a
    distribution meets these requirements.

    Standard License Header

    Copyright {{YEAR}} {{NAME}}

    This program can redistributed and/or modified under the terms
    of the LaTeX Project Public License Distributed from CTAN
    archives in directory macros/latex/base/lppl.txt; either
    version 1 of the License, or (at your option) any later version.