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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>The LaTeX project public license</title> <meta name="description" content="Home of the LaTeX project public license (LPPL), which is a free software license. How to use LPPL, versions of LPPL."> <meta name="viewport" content="width=device-width"> <link rel="stylesheet" href="/css/screen.css"> <link rel="stylesheet" href="/fa/css/font-awesome.css"> <script src="/js/vgwort.js"></script> <script src="/js/cookieconsent.js"></script>  </head> <body class="container"> <header> <script type="text/javascript">window.cookieconsent_options = {"message":"This website uses cookies. To learn more, read our","dismiss":"OK","learnMore":"privacy policy","link":"/privacy/","theme":"screen"};</script> <div class="row"> <div class="col cell1of2 search"> <form action="https://www.google.com" id="cse-search-box"> <div> <input type="hidden" name="cx" value="partner-pub-8455398809969217:7128444083" /> <input type="hidden" name="ie" value="UTF-8" /> <input type="text" name="q" size="20" /> <input type="submit" name="sa" value="Search" /> </div> </form> <script type="text/javascript" src="https://www.google.com/coop/cse/brand?form=cse-search-box&lang=en"></script> </div> </div> <a class="site-title" href="/"><img src="/img/latex-project-logo.svg" alt="The LaTeX Project logo"><span>The LaTeX Project</span></a> <nav> <label for="show-menu" class="show-menu">Show Menu</label> <input type="checkbox" id="show-menu" > <ul> <li> <a href="/">Home</a></li> <li> <a href="/about/">About</a></li> <li> <a href="/get/">Get</a></li> <li> <a href="/latex3/">LaTeX3</a></li> <li> <a href="/publications/">Publications</a></li> <li> <a href="/help/">Help</a></li> <li> <a href="/news/">News</a></li> </ul> </nav> </header> <div class="wrap"> <article> <h1 id="current-version-of-the-lppl">Current version of the LPPL</h1> <p>The LaTeX project public license is a <a href="https://www.debian.org/intro/free">free software</a> license. The most recent version of the LPPL is version 1.3c. The latest version, in plain text, can always be found at <a href="/lppl.txt">https://latex-project.org/lppl.txt</a>. There is also a LaTeX version of the license, which authors of LPPL software are encouraged to include in their manuals.</p> <p>The article <a href="/publications/2011-FMi-TUB-tb100mittbach-lppl-history.pdf" target="_blank" onclick="vgwPixelCall('47fddd07482e43119a3460a269650aa8');">Reflections on the history of the LaTeX Project Public License (LPPL) - A software license for LaTeX and more</a> gives some background information on the license, explains it components and the reasons behind it.</p> <h2 id="how-to-use-the-lppl">How to use the LPPL</h2> <p>To use this license, place in each of the components of your work both an explicit copyright notice including your name and the year the work was authored and/or last substantially modified. Include also a statement that the distribution and/or modification of that component is constrained by the conditions in this license.</p> <p>Here is an example of such a notice and statement:</p> <figure class="highlight"><pre><code class="language-text" data-lang="text">%% pig.dtx %% Copyright 2008 M. Y. Name % % This work may be distributed and/or modified under the % conditions of the LaTeX Project Public License, either version 1.3 % of this license or (at your option) any later version. % The latest version of this license is in % https://www.latex-project.org/lppl.txt % and version 1.3c or later is part of all distributions of LaTeX % version 2008 or later. % % This work has the LPPL maintenance status `maintained'. % % The Current Maintainer of this work is M. Y. Name. % % This work consists of the files pig.dtx and pig.ins % and the derived file pig.sty.</code></pre></figure> <p>Given such a notice and statement in a file, the conditions given in this license document would apply, with the `Work’ referring to the three files `pig.dtx’, `pig.ins’, and `pig.sty’ (the last being generated from `pig.dtx’ using `pig.ins’), the `Base Interpreter’ referring to any `LaTeX-Format’, and both `Copyright Holder’ and `Current Maintainer’ referring to the person `M. Y. Name’.</p> <h2 id="versions-of-the-lppl">Versions of the LPPL</h2> <p><strong>Version 1.3c should be used for all new works distributed under the LPPL</strong>.</p> <blockquote> <p>If a work refers to LPPL 1.3 as its license (like the example above) this is interpreted as the latest version of the 1.3 license, i.e., version 1.3c!</p> </blockquote> <ul> <li><a href="lppl-1-3c/">Version 1.3c</a>, also as <a href="lppl-1-3c.txt">plain text</a>, <a href="lppl-1-3c.tex">LaTeX source code</a>, and as a <a href="lppl-1-3c.pdf">PDF file</a> (~81.3 kB)</li> <li><a href="lppl-1-2/">Version 1.2</a>, also as <a href="lppl-1-2.txt">plain text</a></li> <li><a href="lppl-1-1/">Version 1.1</a>, also as <a href="lppl-1-1.txt">plain text</a></li> <li><a href="lppl-1-0/">Version 1.0</a>, also as <a href="lppl-1-0.txt">plain text</a></li> </ul> <p>Previous versions of the 1.3 set of licenses are listed below for reference purposes only; they differ from the current version only in minor ways, where it was necessary to reclarify or correct certain statements in the license.</p> <ul> <li><a href="lppl-1-3b/">Version 1.3b</a>, also as <a href="lppl-1-3b.txt">plain text</a></li> <li><a href="lppl-1-3a/">Version 1.3a</a>, also as <a href="lppl-1-3a.txt">plain text</a></li> <li><a href="lppl-1-3/">Version 1.3</a>, also as <a href="lppl-1-3.txt">plain text</a></li> </ul> <p>Unofficial (contributed) translations of the LPPL</p> <p>The translations in this section are offered with the intention of helping people to understand the LaTeX Project Public License (LPPL). They are, however, not official translations nor are they, in the legal sense, acknowledged.</p> <ul> <li><a href="lppl-1-3b_de/">Version 1.3b, german (deutsch)</a></li> </ul> </article> </div> <footer> <div class="row"> <div class="col cell3of5"> <svg xmlns="http://www.w3.org/2000/svg" overflow="scroll" height="40.731" width="110"> <title id="title3047">LaTeX logo</title> <g id="g3049" fill="#EEE" transform="scale(4.4176707,4.4176707)"> <path id="path3051" d="M5.46,4.23h-0.25c-0.1,1.02-0.24,2.26-2,2.26h-0.81c-0.47,0-0.49-0.07-0.49-0.4v-5.31c0-0.34,0-0.48,0.94-0.48h0.33v-0.3c-0.36,0.03-1.26,0.03-1.67,0.03-0.39,0-1.17,0-1.51-0.03v0.3h0.23c0.77,0,0.79,0.11,0.79,0.47v5.25c0,0.36-0.02,0.47-0.79,0.47h-0.23v0.31h5.19s0.27-2.57,0.27-2.57z" transform="translate(0,0.17)"/> <path id="path3053" d="M2.81,0.16c-0.04-0.12-0.06-0.16-0.19-0.16s-0.16,0.04-0.2,0.16c0,0-1.61,4.08-1.61,4.08-0.07,0.17-0.19,0.48-0.81,0.48v0.25h1.55v-0.25c-0.31,0-0.5-0.14-0.5-0.34,0-0.05,0.01-0.07,0.03-0.14,0,0,0.34-0.86,0.34-0.86h1.98s0.4,1.02,0.4,1.02c0.02,0.04,0.04,0.09,0.04,0.12,0,0.2-0.38,0.2-0.57,0.2v0.25h1.97v-0.25h-0.14c-0.47,0-0.52-0.07-0.59-0.27,0,0-1.7-4.29-1.7-4.29zm-0.4,0.71s0.89,2.26,0.89,2.26h-1.78s0.89-2.26,0.89-2.26z" transform="translate(2.48,0)"/> <path id="path3055" d="M6.27,0h-6.09s-0.18,2.24-0.18,2.24h0.24c0.14-1.61,0.29-1.94,1.8-1.94,0.18,0,0.44,0,0.54,0.02,0.21,0.04,0.21,0.15,0.21,0.38v5.25c0,0.34,0,0.48-1.05,0.48h-0.4v0.31c0.41-0.03,1.42-0.03,1.88-0.03s1.49,0,1.9,0.03v-0.31h-0.4c-1.05,0-1.05-0.14-1.05-0.48v-5.25c0-0.2,0-0.34,0.18-0.38,0.11-0.02,0.38-0.02,0.57-0.02,1.5,0,1.65,0.33,1.79,1.94h0.25s-0.19-2.24-0.19-2.24z" transform="translate(7.03,0.23)"/> <path id="path3057" d="M6.16,4.2h-0.25c-0.25,1.53-0.48,2.26-2.19,2.26h-1.32c-0.47,0-0.49-0.07-0.49-0.4v-2.66h0.89c0.97,0,1.08,0.32,1.08,1.17h0.25v-2.64h-0.25c0,0.85-0.11,1.16-1.08,1.16h-0.89v-2.39c0-0.33,0.02-0.4,0.49-0.4h1.28c1.53,0,1.79,0.55,1.95,1.94h0.25s-0.28-2.24-0.28-2.24h-5.6v0.3h0.23c0.77,0,0.79,0.11,0.79,0.47v5.22c0,0.36-0.02,0.47-0.79,0.47h-0.23v0.31h5.74s0.42-2.57,0.42-2.57z" transform="translate(12.5,2.45)"/> <path id="path3059" d="m3.76,2.95s1.37-2,1.37-2c0.21-0.32,0.55-0.64,1.44-0.65v-0.3h-2.38v0.3c0.4,0.01,0.62,0.23,0.62,0.46,0,0.1-0.02,0.12-0.09,0.23,0,0-1.14,1.68-1.14,1.68s-1.28-1.92-1.28-1.92c-0.02-0.03-0.07-0.11-0.07-0.15,0-0.12,0.22-0.29,0.64-0.3v-0.3c-0.34,0.03-1.07,0.03-1.45,0.03-0.31,0-0.93-0.01-1.3-0.03v0.3h0.19c0.55,0,0.74,0.07,0.93,0.35,0,0,1.83,2.77,1.83,2.77s-1.63,2.41-1.63,2.41c-0.14,0.2-0.44,0.66-1.44,0.66v0.31h2.38v-0.31c-0.46-0.01-0.63-0.28-0.63-0.46,0-0.09,0.03-0.13,0.1-0.24,0,0,1.41-2.09,1.41-2.09s1.58,2.38,1.58,2.38c0.02,0.04,0.05,0.08,0.05,0.11,0,0.12-0.22,0.29-0.65,0.3v0.31c0.35-0.03,1.08-0.03,1.45-0.03,0.42,0,0.88,0.01,1.3,0.03v-0.31h-0.19c-0.52,0-0.73-0.05-0.94-0.36,0,0-2.1-3.18-2.1-3.18z" transform="translate(17.91,0.17)"/> </g> </svg> <p>LaTeX is a document preparation system used for the communication and publication of scientific documents. 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