{{documentation subpage}}
OR
{{documentation subpage|[[main page to link to]]|[[documentation to link to]]}}
This template should be placed at the top of "/doc" pages. It changes output depending on where it is viewed:
In addition to the output message, the template categorizes pages to Category:Template documentation, Category:User documentation, or similar (named after the subject space), but only for documentation pages in namespaces with the subpage feature. It defaults the sort key to the page name without namespace (ie, "Foo" on "Template:Foo", so it would be sorted in categories under 'F').