12. rel attribute
the relationship from the
current document
to the anchor specified by
the href attribute
<link rel=“stylesheet” href=“foo.css” />
<a rel=“help” href=“foo.htm”>help</a>
14. XFN
<li><a rel=“friend met colleague”
href=“http://suda.co.uk/”>
Brian Suda
</a> </li>
<li><a rel=“friend met co-worker”
href=“http://andybudd.com/”>
Andy Budd
</a> </li>
19. hCalendar
XTech 2007 is taking place in Paris
from May 15th to 18th.
<span class=“summary”>
XTech 2007
</span>
<span class=“location”>
Paris
</span>