XFN

• The XHTML Friends Network lets you classify and link friends.

<a href="http://jane-blog.example.org/" rel="sweetheart date met">Jane</a> 
<a href="http://dave-blog.example.org/" rel="friend met">Dave</a> 
<a href="http://darryl-blog.example.org/" rel="friend met">Darryl</a> 
<a href="http://www.metafilter.com/">MetaFilter</a> 
<a href="http://james-blog.example.com/" rel="met">James Expert</a>