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<h1 id="project_title">Libical</h1>
<h2 id="project_tagline">Libical is an Open Source implementation of the iCalendar protocols and protocol data units.</h2>
<section id="downloads">
<a class="zip_download_link" href="https://github.com/libical/libical/zipball/master">Download this project as a .zip file</a>
<a class="tar_download_link" href="https://github.com/libical/libical/tarball/master">Download this project as a tar.gz file</a>
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<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 the
CalDav scheduling extensions in RFC6638; iCalendar extensions in RFC7986;
plus the iCalendar iMIP protocol in RFC6047.</p>
<p>See the <a href="apidocs/index.html">API Documentation</a>.</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) v2.0. See <a href="http://www.mozilla.org/MPL/2.0">http://www.mozilla.org/MPL/2.0</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>
<h1>
<a name="used-by" class="anchor" href="#used-by"><span class="octicon octicon-link"></span></a>Libical Users</h1>
In no particular order:
<ul>
<li><a href="https://www.cyrusimap.org">Cyrus Email/Calendars/Contacts Server</a></li>
<li><a href="https://syncevolution.org">syncEvolution</a></li>
<li><a href="https://flexibits.com/fantastical">Fantastical</a>
<p>
<li><a href="https://gitlab.gnome.org/GNOME/evolution-data-server">GNOME's EDS (evolution-data-server)</a> which serves data to:
<ul>
<li><a href="https://wiki.gnome.org/Apps/Evolution">Evolution</a></li>
<li><a href="https://wiki.gnome.org/Apps/Calendar">GNOME Calendar</a></li>
<li><a href="https://wiki.gnome.org/Apps/Notes">GNOME Notes</a></li>
<li><a href="https://wiki.gnome.org/Apps/Todo">GNOME Todo</a></li>
<li>and more GNOME apps...</li>
</ul></li>
<li>KDE's <a href="https://kontact.kde.org">Kontact Suite</a>, including:
<ul>
<li><a href="https://kontact.kde.org/components/akonadi.html">Akonadi framework</a></li>
<li><a href="https://kontact.kde.org/components/korganizer.html">KOrganizer calendar and scheduling component</a></li>
<li>and more KDE apps...</li>
</ul></li>
</ul>
<h1>
<a name="get-involved" class="anchor" href="#get-involved"><span class="octicon octicon-link"></span></a>Get Involved</h1>
<p>Subscribe to our mailing lists:</p>
<p>For developer discussions
<a href="http://lists.infradead.org/mailman/listinfo/libical-devel">http://lists.infradead.org/mailman/listinfo/libical-devel</a></p>
<p>For general discussions about libical and related projects
<a href="http://lists.infradead.org/mailman/listinfo/libical-interest">http://lists.infradead.org/mailman/listinfo/libical-interest</a></p>
<p>Report bugs to our issue tracker at
<a href="https://github.com/libical/libical/issues">https://github.com/libical/libical/issues</a></p>
<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>See the <a href="apidocs/index.html">API Documentation</a>.</p>
<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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