Semantic web indexing

Here is a good article on semanatic web indexing.

"The most surprising figure here is probably the abundance of FOAF namespaced arcs, this appears to be largely due to the FOAF data automatically generated by services such as Live Journal (http://livejournal.com/) which, of the documents indexed so far account for 89% of the documents using the FOAF namespace."

FOAF Semantic indexing from w3