From Halopedia, the Halo wiki

Many namespaces can be linked to within Halopedia.

Complete list of namespaces

Namespace Purpose Example
(main) Contains all the articles about Halo Halo 2
Talk Contains discussion pages about the articles in the main namespace, one for each main-namespace page. Talk:Halo 2
User Contains user pages - one page (and possibly subpages) for each user – see Halopedia:User space. User:Porplemontage
User talk Contains pages used to discuss things specifically with other users - add a message to the user talk page of the user you want to contact. User talk:Porplemontage
Halopedia Contains pages that are specifically about the wiki, rather than Halo - behind-the-scenes administration and similar things. Halopedia:FAQ
Halopedia talk Discussions about Halopedia pages, one for each Halopedia page (similar to Talk). Halopedia talk:FAQ
File When a file is uploaded, it goes into the File namespace. A link labelled [[File:filename]] will include the image in a page, clicking on it will go to an information page. [[:File:filename]] will be a normal text link to that information page and [[Media:filename]] a direct link straight to the file File:Halo2-M90-Shotgun.png
File talk Same as Talk, but for the images. Not regularly used on this wiki. File talk:Halo2-M90-Shotgun.png
MediaWiki Contains pages that control some part of how the wiki functions, and all the messages displayed by the wiki (so that users of the MediaWiki software can translate them). Only sysops can edit these pages, but anyone can make suggestions on the MediaWiki talk pages. MediaWiki:Sitenotice
MediaWiki talk Same as Talk, for MediaWiki pages. Used even less often than Image talk - the MediaWiki pages are relatively static. MediaWiki talk:Sitenotice
Template Contains pages that are intended to be included in another page with {{curly braces}}. If you use the curly braces and don't specify a namespace, the templates will come from here. Template:Game infobox
Template talk Same as Talk, for the templates. Template talk:Game infobox
Help Contains pages designed to help people learn how to use the wiki. Help:Editing
Help talk Same as Talk, for Help pages. Help talk:Editing
Category These pages don't have much content, rather they are used to group other pages. Adding [[Category:categoryname]] to any page will put it in that category. Like with Image, you can use [[:Category:categoryname]] to link to a category. Category:Games
Category talk Same as Talk, for the categories. Category talk:Games
Forums This namespace is used to store the Halopedia forum posts. Forum:Index
Forum talk Same as Talk, for the Forums. Forum talk:Index
Archive This namespace is used to store important documents used as references and other similar stuff on Halopedia. Archive:Halo Nation
Archive talk Same as Talk, for the Archives. Archive talk:Main
News This namespace is used to store articles created by the Halopedia News team. News:Main
News talk Same as Talk, for the News. News talk:Main
Special This doesn't actually contain editable pages, but rather automated scripts, for various purposes such as the watch list and recent changes. It also has important pages for the maintenance of the wiki. Special:SpecialPages

Interwiki links

Although interwiki prefixes are not namespaces, you can use the namespace style to link to pages on other sites: