HTML New link relations

<link rel='alternate' type='application/rss+xml' href='http://mypage.com/feed'>
<link rel='icon' href='favicon.ico' />
<link rel='pingback' href='http://mypage.com/home'>
<link rel='prefetch' href='http://mypage.com/end'>
...

<a rel='archives' href='http://mypage.com/archives'>old posts</a>
<a rel='external' href='http://notmypage.com'>tutorial</a>
<a rel='license' href='http://www.apache.org/licenses/'>license</a>
<a rel='nofollow' href='http://notmypage.com/sample'>sample</a>
<a rel='tag' href='http://mypage.com/category/html'>html</a>

http://blog.whatwg.org/the-road-to-html-5-link-relations

http://slides.html5rocks.com/#slide18