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• copyleft: the 6 creative common
• gnu free documentation
• copyright (all right reserved)
• drink ware

A feature of MediaWiki allows the Special:Upload Page to streamline licensing of images. Wikipedia's Upload Page has a Licensing drop down box below image summary. This feature is turned off in default MediaWiki. To turn this feature on a sysop needs to edit Licenses in the MediaWiki namespace (example: MediaWiki:Licenses). S/he can do this by going to the MediaWiki:Licenses page of their wiki and clicking 'create' or 'edit'.

The page MediaWiki:Licenses expects a certain format in a wiki list.

 *subst:license 1|license 2|License text

 * Header 1:

 ** cc-by-sa-2.5|Attribution ShareAlike 2.5

• this will produce "Attribution ShareAlike 2.5" and transclude template cc-by-sa-2.5 (link to Template:cc-by-sa-2.5) on the image page.

Line 1 will produce "License text" and substitute the license 1 template in the image page and transclude license 2. Line 2 will show a greyed out header with text "Header 1:"

For detailed real world example, see Wikipedia:MediaWiki:Licenses or Commons:MediaWiki:Licenses.