Bye-bye Elementals, Hello Compounds
So now you know how to add semantic richness to your social links with XFN. And you know all the elemental microformats: rel-based, VoteLinks, and XFN. Remember, these are microformats that rely on a single attribute-value pair.
From this point forward, all of the microformats we'll be covering are compound microformats, comprised of properties and subproperties. But don't fret! The elemental microformats are often used within compounds, so you'll be seeing them again.
Now get ready to learn how to add semantics to bookmarks with xFolk.