Help:Namespaces

Pages on a MediaWiki wiki are grouped into collections called "namespaces", which differentiate between the purpose of the pages at a high level. Pages in certain namespaces can also have special properties or behave differently when they interact with other pages.

Namespaces are indicated in page titles by prefixing the page name with " ", so the prefix " " in this page's title ("") indicates that this page is in the namespace. Each namespace is identified by a number and a name, which can be translated and can also have some aliases.

A page whose name is not prefixed by a namespace lies in the mainspace>#blank-ns|mainspace. Note, however, that colons and prefixes can also appear in page titles without indicating a namespace: the page Foo: is a page located in the mainspace because the namespace "Foo" does not exist. Similarly the page Foo: is in the "" namespace.

Standard namespaces
The standard MediaWiki installation has sixteen namespaces that can contain user-generated content; there are also two special namespaces that contain pages created 'on the fly' by the MediaWiki software. The standard namespaces are organized in pairs, with each pair containing a "subject namespace" and a "discussion namespace". The namespaces are numbered from zero such that all subject namespaces have even indices and all talk namespaces have odd indices.

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Special
This namespace is used to group help-specpages>Special:MyLanguage/Help:Special pages|special pages, reports and interfaces that are generated "on demand" by MediaWiki and that are not directly editable. It is not possible to create pages in this namespace except by modifying or extending the MediaWiki software.

The namespace that has no prefix separated by a colon. Commonly called the "main namespace" or "mainspace". This namespace typically contains the bulk of the content pages in a wiki. This namespace generally has no special properties.

Talk
The "Talk" namespace is the discussion namespace attached to the mainspace. It has no special properties.

User
Each user has a corresponding page in the     namespace, which is linked to from edit histories, watchlists, recent changes, etc; wherever an individual user is uniquely identified.

This page, and subpages of it, can be used by users to record information about themselves or to test and draft new content. Pages of the form " " or " " can only be edited by the user themselves or by help-sysops>Special:MyLanguage/Help:Sysops and permissions|administrators.

User talk
This namespace is the talkspace associated with the     namespace. Pages in this namespace are mainly used to leave messages for particular users or inform them of discussions that may be of interest to them. To facilitate this, when a page     :UserName is edited, whenever the user "UserName" loads a page, a notice is displayed at the top of the page informing them of the edit:

This notice continues to appear until the user loads their user talk page to read the message.

Project
This namespace is normally used for meta-discussions related to the operation and development of the wiki. It has no special properties.

Project talk
This is a talk namespace that is normally used for discussions related to the associated project pages. It has no special properties.

File


The     namespace is used to store metadata for images, videos, sound files and other media accessed via the      namespace. Each file has a corresponding page in the     namespace, which is often used to hold licensing data. Linking directly to a page in this namespace instead includes the media file inline in the page:  produces the image to the right. See help-images>Special:MyLanguage/Help:Images|Help:Images for more details of this link syntax.

To create an help-links>Special:MyLanguage/Help:Links|internal link to the file page, you need to add a colon to the front of the namespace:  produces     :Wiki.png. The standard MediaWiki installation has alias "Image" for     namespace - See ns-aliases>#ns-aliases|Namespace aliases.

For linking media files directly, bypassing the description page, see ns-media>#ns-media|Media namespace.

File talk
This is a talk namespace that is normally used for discussions related to the associated media files. It has no special properties.

MediaWiki
The MediaWiki namespace is used to hold system messages and other important content. For instance, the page    :Edit (or     :Vector-view-edit in the default "Vector" skin) contains the text that fills the "" tab at the top of every page. If that page exists, it overrides the default content, which is "Edit". Similarly,    :Common.css is the system message that holds the CSS code that is loaded for all users for each page. It has the special property that the entire namespace is fully protected and can only be edited by administrators.

MediaWiki talk
This is a talk namespace that is normally used for discussions related to the associated system messages. It has no special properties.

Template
The     namespace is used to hold help-templates>Special:MyLanguage/Help:Templates|templates, blocks of text or wikicode that are intended to be transcluded into several other pages. To facilitate this it has the special property that it is the default namespace for transclusions: the wikicode  is equivalent to.

Template talk
This is a talk namespace that is normally used for discussions related to the associated template pages. It has no special properties.

Help
The     namespace is usually used to hold help files, instructions and "how-to" guides. It has no special properties.

Help talk
This is a talk namespace that is normally used for discussions related to the associated help pages. It has no special properties.

Category
The     namespace contains help-categories>Special:MyLanguage/Help:Categories|categories, dynamic lists of other pages. To facilitate this, linking directly to a category page does not output an inline link, but instead includes the page into the associated category page. So the code  causes a category link to appear at the bottom of the page (at the bottom in the box marked ""). Clicking on that link takes you to the category page, where this page is visible in the category list.

To create an inline link to a category page, you need to add a colon to the front of the namespace:  produces     :Help. See help-categories>Special:MyLanguage/Help:Categories|Help:Categories for more details on category link syntax.

Category talk
This is a talk namespace that is normally used for discussions related to the associated category pages. It has no special properties.

Localisation
Namespace names and aliases can be localized by developers.

To request the localization of namespace names, please [https://phabricator.wikimedia.org/maniphest/task/create/?projects=MediaWiki-Internationalization file a MediaWiki internationalization task] at <tvar|phab></>.

In the description of the task, you should provide translations of all the namespaces in the table to the right, as well as any additional namespaces on your wiki (such as "Module" or "Gadget").

Renaming namespaces
Namespace names can be translated into languages other than English and individual namespaces can be renamed, as set by a wiki's system admins (using Namespace manager). These names are known as the 'localized' namespace names. However, all namespaces have a 'canonical name', the original English name which will work on any installation of MediaWiki. So linking to User:Foo will always locate the user page for the user foo, whether the wiki is in French (where the localized name would be Utilisateur:Foo), Russian (Участник:Foo), or Hindi (सदस्य:Foo).

The canonical namespace names are given in the table to the right along with their localized names on this wiki.

Namespace aliases
On some wikis there are also namespace aliases: alternative names that will also be resolved to the localised names. For instance, a wiki might define "T" as an alias for   , such that typing T:Foo is equivalent to     :Foo, saving a few characters and seconds. An actual example would be on the English Wikipedia, where "WP" is an alias for   , which is the namespace "Wikipedia".

By default, "Image" is an alias for   , so   is equivalent to.

Custom namespaces

 * See for more information.

Some wikis may wish to organize their content in ways that do not fit into this standard set of namespaces. A wiki may define additional namespaces to facilitate this; these namespaces behave exactly like normal namespaces, and generally have indices greater than or equal to 100. These custom namespaces generally have no special properties.

Identifying namespaces
There are a number of ways by which the namespace of a particular page can be identified:


 * Magic words

The help-mw>Special:MyLanguage/Help:Magic word</>|magic word  returns the value of the namespace the page is in.


 * JavaScript

The JavaScript variable  contains the full namespace name. The variable  contains the numerical index of the namespace.


 * CSS

The  tag of the HTML page output is given two CSS classes that vary by namespace: A class , where # is the index of the namespace, and  , where XXX is " " for all , " " for pages in the      namespace, and " " for. So CSS code such as the following can be used to change the appearance of an object based on its namespace:

You can get a complete list of all namespace names of a MediaWiki installation from the Search results page Advanced tab, or from any recent changes page such as contributions or watchlist in its options box, in a drop-down list.

For the system properties of each namespace, use the MediaWiki <tvar|api></>:


 * API