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<h1>Libical</h1
<p>Libical is an Open Source (MPL/<acronym title="GNU Lesser General Public License">LGPL</acronym>) implementation of the IETF's iCalendar Calendaring and Scheduling protocols. (RFC 2445, 2446, and 2447). It parses iCal components and provides C/C++/Python/Java APIs for manipulating the component properties, parameters, and subcomponents.</p>
<p class="view"><a href="https://github.com/libical/libical">View the Project on GitHub <small>libical/libical</small></a></p>
<ul>
<li><a href="https://github.com/libical/libical/zipball/master">Download <strong>ZIP File</strong></a></li>
<li><a href="https://github.com/libical/libical/tarball/master">Download <strong>TAR Ball</strong></a></li>
<li><a href="https://github.com/libical/libical">View On <strong>GitHub</strong></a></li>
</ul>
</header>
<section>
<h1>
<a name="introduction" class="anchor" href="#introduction"><span class="octicon octicon-link"></span></a>Introduction</h1>
<p>LIBICAL -- an implementation of iCalendar protocols and data formats</p>
<p>Most of the code in here was written by Eric Busboom with help from
dozens of contributors. It is currently maintained by Art Cancro
and Wilfried Goesgens.</p>
<p>Libical is an Open Source implementation of the iCalendar protocols
and protocol data units. The iCalendar specification describes how
calendar clients can communicate with calendar servers so users can
store their calendar data and arrange meetings with other users. </p>
<p>Libical implements RFC2445, RFC2446 and some of RFC2447.</p>
<h1>
<a name="license" class="anchor" href="#license"><span class="octicon octicon-link"></span></a>License</h1>
<p>The code and datafiles in this distribution are licensed under the
Mozilla Public License (MPL) v1.0. See <a href="http://www.mozilla.org/MPL/1.0">http://www.mozilla.org/MPL/1.0</a>
for a copy of the license. </p>
<p>Alternately, you may use libical under the terms of the GNU Library
General Public License (LGPL) v2.1. See <a href="http://www.gnu.org/licenses/lgpl-2.1.txt">http://www.gnu.org/licenses/lgpl-2.1.txt</a>
for a copy of the license.</p>
<p>This dual license ensures that the library can be incorporated into
both proprietary code and GPL'd programs, and will benefit from improvements
made by programmers in both realms. I will only accept changes into
my version of the library if they are similarly dual-licensed.</p>
<h1>
<a name="acknowledgments" class="anchor" href="#acknowledgments"><span class="octicon octicon-link"></span></a>Acknowledgments</h1>
<p>Portions of this distribution are (C) Copyright 1996 Apple Computer,
Inc., AT&T Corp., International Business Machines Corporation and
Siemens Rolm Communications Inc. See src/libicalvcal/README.TXT for
details.</p>
<p>Portions of this distribution are Copyright (c) 1997 Theo de
Raadt. See the header for src/libical/vsnprintf.c for the full
copyright statement.</p>
<h1>
<a name="get-involved" class="anchor" href="#get-involved"><span class="octicon octicon-link"></span></a>Get Involved</h1>
<p>Subscribe to our development mailing list at <a href="https://lists.sourceforge.net/lists/listinfo/freeassociation-devel">https://lists.sourceforge.net/lists/listinfo/freeassociation-devel</a></p>
</div>
<h1 class="sectionedit3"><a name="whouseslibical" id="whouseslibical">Who uses libical?</a></h1>
<p>
Probably you! Practically every non-Microsoft calendar software package in existence includes libical in its build. Here are a few:
</p>
<ul>
<li class="level1"><div class="li"> <a href="http://citadel.org/" class="urlextern" title="http://citadel.org/">Citadel</a> groupware server</div>
</li>
<li class="level2"><div class="li"> <a href="http://www.gnome.org/projects/evolution/" class="urlextern" title="http://www.gnome.org/projects/evolution/">Evolution</a> </div>
</li>
<li class="level2"><div class="li"> <a href="http://kontact.org/" class="urlextern" title="http://kontact.org/">Kontact</a></div>
</li>
<li class="level2"><div class="li"> <a href="http://www.mozilla.org/projects/calendar/" class="urlextern" title="http://www.mozilla.org/projects/calendar/">Mozilla Lightning and Sunbird</a></div>
</li>
<li class="level2"><div class="li"> <a href="http://sourceforge.net/projects/modcaldav/" class="urlextern" title="http://sourceforge.net/projects/modcaldav/">Apache mod_caldav</a></div>
</li>
<li class="level2"><div class="li"> <a href="http://coyote.octets.fr/simpleagenda" class="urlextern" title="http://coyote.octets.fr/simpleagenda">Simple Agenda</a> GNUstep Calendaring Application</div>
</li>
<li class="level2"><div class="li"> <a href="http://clay.ll.pl/osmo/" class="urlextern" title="http://clay.ll.pl/osmo/">Osmo</a>, the handy PIM Client</div>
</li>
<li class="level2"><div class="li"> <a href="http://www.rememberthemilk.com" class="urlextern" title="http://www.rememberthemilk.com">Remember the Milk</a>, an online task manager</div>
</li>
<li class="level2"><div class="li"> <a href="http://www.bynari.net/products/insight_connector/insight_connector_for_3rd_party_applications.html" class="urlextern" title="http://www.bynari.net/products/insight_connector/insight_connector_for_3rd_party_applications.html">Bynari Insight Connector</a></div>
</li>
<li class="level2"><div class="li"> <a href="http://moblin.org/projects/syncevolution" class="urlextern" title="http://moblin.org/projects/syncevolution">SyncEvolution</a> syncronisation framework for Evolution</div>
</li>
</ul>
<h1>
<a name="building-the-library" class="anchor" href="#building-the-library"><span class="octicon octicon-link"></span></a>Building the library</h1>
<p>See the top-level Install.txt file.</p>
<h1>
<a name="using-the-library" class="anchor" href="#using-the-library"><span class="octicon octicon-link"></span></a>Using the Library</h1>
<p>There is rudimentary, unfinished documentation in the /doc directory,
and annotated examples in /examples and the test code in src/test.</p>
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