Editing Bourbon Wiki:Namespace (section)

== Programming ==
{{anchor|Enumeration}}
The 28 namespaces in the English Wikipedia are numbered for programming purposes. The prefix for each namespace is generated by a [[m:Help:Variable|variable]], using the [[Help:Magic words#Paths|magic word]] <syntaxhighlight lang=wikitext inline>{{ns}}</syntaxhighlight>, in the form <syntaxhighlight lang=wikitext inline>{{ns:xx}}</syntaxhighlight>, as shown in the table below.

{| border="0" cellpadding="4" cellspacing="0" class="wikitable"
|-
!Namespace variable
!Result (namespace name)
!Namespace variable
!Result (talk namespace name)
|-
|<syntaxhighlight lang=wikitext inline>{{ns:-2}}</syntaxhighlight>
|{{ns:-2}}
|
|
|-
|<syntaxhighlight lang=wikitext inline>{{ns:-1}}</syntaxhighlight>
|{{ns:-1}}
|
|
|-
|<syntaxhighlight lang=wikitext inline>{{ns:0}}</syntaxhighlight>
|{{ns:0}} (main namespace, returns empty string)
|<syntaxhighlight lang=wikitext inline>{{ns:1}}</syntaxhighlight>
|{{ns:1}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:2}}</syntaxhighlight>
|{{ns:2}}
|<syntaxhighlight lang=wikitext inline>{{ns:3}}</syntaxhighlight>
|{{ns:3}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:4}}</syntaxhighlight>
|{{ns:4}}
|<syntaxhighlight lang=wikitext inline>{{ns:5}}</syntaxhighlight>
|{{ns:5}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:6}}</syntaxhighlight>
|{{ns:6}}
|<syntaxhighlight lang=wikitext inline>{{ns:7}}</syntaxhighlight>
|{{ns:7}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:8}}</syntaxhighlight>
|{{ns:8}}
|<syntaxhighlight lang=wikitext inline>{{ns:9}}</syntaxhighlight>
|{{ns:9}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:10}}</syntaxhighlight>
|{{ns:10}}
|<syntaxhighlight lang=wikitext inline>{{ns:11}}</syntaxhighlight>
|{{ns:11}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:12}}</syntaxhighlight>
|{{ns:12}}
|<syntaxhighlight lang=wikitext inline>{{ns:13}}</syntaxhighlight>
|{{ns:13}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:14}}</syntaxhighlight>
|{{ns:14}}
|<syntaxhighlight lang=wikitext inline>{{ns:15}}</syntaxhighlight>
|{{ns:15}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:100}}</syntaxhighlight>
|{{ns:100}}
|<syntaxhighlight lang=wikitext inline>{{ns:101}}</syntaxhighlight>
|{{ns:101}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:118}}</syntaxhighlight>
|{{ns:118}}
|<syntaxhighlight lang=wikitext inline>{{ns:119}}</syntaxhighlight>
|{{ns:119}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:710}}</syntaxhighlight>
|{{ns:710}}
|<syntaxhighlight lang=wikitext inline>{{ns:711}}</syntaxhighlight>
|{{ns:711}}
|-
|<syntaxhighlight lang=wikitext inline>{{ns:828}}</syntaxhighlight>
|{{ns:828}}
|<syntaxhighlight lang=wikitext inline>{{ns:829}}</syntaxhighlight>
|{{ns:829}}
|}

Alternative variables are available for most namespaces, for example <syntaxhighlight lang=wikitext inline>{{ns:talk}}</syntaxhighlight>, <syntaxhighlight lang=wikitext inline>{{ns:user}}</syntaxhighlight>, and <syntaxhighlight lang=wikitext inline>{{ns:user_talk}}</syntaxhighlight> for <syntaxhighlight lang=wikitext inline>{{ns:1}}</syntaxhighlight>, <syntaxhighlight lang=wikitext inline>{{ns:2}}</syntaxhighlight> and <syntaxhighlight lang=wikitext inline>{{ns:3}}</syntaxhighlight>. The portal namespace is numbered in the 100-plus range, as are all MediaWiki nonstandard namespaces. It is also possible to use {{tl|Namespace name}} for this, i.e. "<syntaxhighlight lang=wikitext inline>{{Namespace name|711}}</syntaxhighlight>" produces "{{Namespace name|711}}".

All namespaces with a positive number or zero in this list are searchable. Specifically, the {{ns:-2}} and {{ns:-1}} namespaces are not searchable.

The [[Help:Magic words|magic word]] <syntaxhighlight lang=wikitext inline>{{NAMESPACE}}</syntaxhighlight> returns the namespace prefix of the current page. This can be used in combination with other magic words and [[meta:Help:ParserFunctions|parser functions]] to change the appearance of [[WP:Template|templates]] depending on the namespace in which they are transcluded.

Meta-templates have been created to simplify this process. These include the simple template {{tl|main other}}, and the more complex and versatile {{tl|namespace detect}}.

For information on changing the appearance of a page or template by namespace based on CSS, see '''CSS''' section of [[mw:Help:Namespaces#Identifying namespaces|Identifying namespaces]] on the MediaWiki help page.