Manual:Copyright

The copyright on a Mediawiki wiki is set at installation and can be adjusted by changing the sitewide copyright notice located at Mediawiki:Copyright and adding this line to the LocalSettings.php file: The copyright notice can be completely eliminated from the footer by changing the skins -> MonoBook.php or Vector.php files.

MediaWiki itself is provided under the GNU General Public License.

Options
Presently, the options available at installation are:
 * No license metadata
 * Creative Commons
 * GFDL
 * version 1.2
 * version 1.3 (since MediaWiki 1.14)
 * public domain (since MediaWiki 1.14)

Related system messages

 * Mediawiki:Copyright
 * Mediawiki:Copyrightpage
 * Mediawiki:Copyrightwarning