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Plone is released under the GNU General Public License (GPL) and is designed to be extensible. Major development is conducted periodically during special meetings called Plone Sprints. Additional functionality is added to Plone with Products, which may be distributed through the Plone website or otherwise. The Plone Foundation holds and enforces all copyrights and trademarks. Plone also has legal backing from the council of the Software Freedom Law Center. MediaWiki's "Monobook" layout is based partially on the Plone style sheets. |