Template:Documentation/doc

Usage
This template exists to include documentation of a particular template using the  subpage. Adding  in, for example, Template:Notice Box effectively transcludes Template:Notice Box/doc.

By default the template will automatically link to a subpage of the page its placed on. The one and only parameter allows you to name a different page instead. This is useful if you want related templates to share the same documentation, as you can link them all to the same subpage.