Template:Breadcrumb/doc
The Breadcrumb template is used to manually insert a breadcrumb navigation bar at the top of a subpage in the main namespace. MediaWiki's automated subpage feature is normally disabled in the main namespace since slashes in the page name may be misinterpreted as subpages, and on the Xenharmonic Wiki slashes frequently appear in page titles like 3/2.
At the moment, it provides a single link back to the base page, whereas full-feature breadcrumbs are normally split at each level of separation using pipes.