rel to your blogroll links
<a href="http://adam.example.com">Adam</a>With XFN:
<a rel="friend" href="http://adam.example.com">Adam</a>
Creative Commons licensedrel="relative"
- outside immediate familyrel="contact"
- less than "acquaintance"rel="me"
- connect the sites that represent yourel attribute<a href="http://gmpg.org/xfn/">XFN</a>With VoteLinks:
<a rel="vote-for" href="http://gmpg.org/xfn/">XFN</a>
profile attribute is key<head profile="http://gmpg.org/xfn/1">...or several:
<head profile="http://gmpg.org/xfn/1 http://developers.technorati.com/wiki/VoteLinks">...to a document
“The trick.... is to make sure that each limited mechanical part of the Web, each application, is within itself composed of simple parts that will never get too powerful.”(Tim Berners-Lee, Weaving The Web)