Dewey.info is an experimental space for linked DDC data. The initial data set available is a linked data version of the DDC Summaries in ten languages. The intention of the dewey.info prototype is to be a platform for Dewey data on the Web.
http://dewey.info/class/641/about.rdf
http://dewey.info/class/641/2009/08/about.fr
http://dewey.info/class/64/2003/08/about.de
http://dewey.info/class/6/2003/08/about.de.rdf
http://dewey.info/class/6/2003/08/about.de.html
http://dewey.info/class/6/e22/about
A general overview of the service can be found here, a slightly more technical description is available on the OCLC Developer Network wiki. Or just dive in by clicking on one of the main classes above.