Help:Colon trick

{{For|the style guideline about using colon in articles|MOS:COLON}}

The colon trick is a method of providing a link to a category, image or interwiki link without adding the page to the category, displaying the image or adding the interwiki link to the interlanguage links. It also allows for linking to pages with titles beginning with a recognized external link prefix, such as :http:// or ://Hus.

By adding a colon just inside the opening double square brackets of the link, the default behaviour of the MediaWiki software will be bypassed. It will appear as a conventional wikilink.

Examples

Category:Help would list this page in Category:Help, but :Category:Help will produce a link to :Category:Help.
File:Wikipedia-logo.png would display an image, but :File:Wikipedia-logo.png will produce a link to :File:Wikipedia-logo.png.
pt:Internet will create an interlanguage link, but :pt:Internet will produce an interwiki link to :pt:Internet (in the Portuguese Wikipedia).
//Hus will produce an (invalid) external link wrapped in brackets ("//Hus"), but ://Hus will produce a link to ://Hus.
Computer links to the Computer article; adding a colon like :Computer can be done, but the colon is unneeded and makes no difference.

With templates

A colon can also be used to transclude a page in mainspace, rather than template space. For example, {{tlx|The Beatles}} will transclude Template:The Beatles, but {{:The Beatles}} will transclude the mainspace article The Beatles. This is useful when the mainspace article has been specially formatted to be transcluded in other articles, by using <noinclude> or <includeonly> tags to indicate the portion that should be included when the article is transcluded.

With edit summaries

Normally, linking to a user page in an edit summary sends a notification to the user. A colon can be used to escape this behaviour. For example, the edit summary "corrected typo by User:Example" will ping User:Example, but "corrected typo by :User:Example" will not.

Colon trick