Joomla! Documentation™

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* Unknown|I don't know exactly
* Free licenses:
** JEDL|Joomla! Electronic Documentation Licence (recommended)
** PD|PD: public domain
** CC-by-sa-2.5|Creative Commons Attribution ShareAlike 2.5 
** GFDL|GFDL: GNU Free Documentation License
** GPL|GPL: GNU General Public License
** LGPL|LGPL: GNU Lesser General Public License
* Non-free license (exception):
** CopyrightByWikimedia|Wikimedia + Wikicommons images