<a href='#' class='external'>Link label</a>
<a href='#' class='external autonumber'>[1]</a>
<a href='#' class='external'>http://www.example.org</a>
MediaWiki:Wikieditor-toolbar-help-content-xlink-result
From Final Kingdom MUSH
<a href='#' class='external'>Link label</a>
<a href='#' class='external autonumber'>[1]</a>
<a href='#' class='external'>http://www.example.org</a>