Mediawiki Namespaces

-2 - Media:
-1 - Special:
 0 - regular articles
 1 - Talk:
 2 - User:
 3 - User_talk:
 4 - Meta:
 5 - Meta_talk:
 6 - Image:
 7 - Image_talk:
 8 - MediaWiki:
 9 - MediaWiki_talk:
10 - Template:
11 - Template_talk:
12 - Help:
13 - Help_talk:
14 - Category:
15 - Category_talk:

• http://meta.wikimedia.org/wiki/Namespace#List_of_namespaces