<http://schema.org/description>
"A couple of days ago I talked about how we have been clearing up some unwanted data in Nepomuk for the 4.11 release - mainly graphs. This change comes with a increased performance of over 100% in many cases,..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://vhanda.in/blog/2013/04/the-nepomuk-migration/>