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<h1>The Principles of Community-Oriented GPL Enforcement</h1>

<p>The GNU General Public License (GPL) is the principal copyleft

license. Copyleft is a framework that permits ongoing sharing of a

published work, with clear permissions that <em>both</em> grant

<em>and</em> defend its users' freedoms &mdash; in contrast to other

<p><em>[ This document is also published on <a href="https://fsf.org/licensing/enforcement-principles">FSF's site</a>. ]</em></p>

<p>Copyright &copy; 2015, Free Software Foundation, Inc., Software Freedom Conservancy, Inc., Bradley M. Kuhn, Allison Randal, Karen M. Sandler.

<br/>Licensed under the <a rel="license" href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons Attribution-ShareAlike 4.0 International License</a>.

<br/>The copyright holders ask that per &sect;3(a)(1)(A)(i) and &sect;3(a)(1)(A)(v) of that license, you ensure these two links (<a href="https://sfconservancy.org/linux-compliance/principles.html">[1]</a>,

<a href="https://fsf.org/licensing/enforcement-principles">[2]</a>) are preserved in modified and/or redistributed versions.</p>