+ '<a href="mailto:user@example.com?subject=test" title="mailto:user@example.com?subject=test" rel="nofollow external">mailto:user@example.com?subject=test</a>'),
+ array('xmpp:user@example.com',
+ '<a href="xmpp:user@example.com" title="xmpp:user@example.com" rel="nofollow external">xmpp:user@example.com</a>'),