Dewey.info is an experimental space for linked DDC data. The intention of the dewey.info prototype is to be a platform for Dewey data on the Web.
http://dewey.info/class/2--4897/
http://dewey.info/class/641/about.rdf
http://dewey.info/class/641/2009-08/about.fr
http://dewey.info/class/64/2009-03/about.de
http://dewey.info/class/6/2009-03/about.de.rdf
http://dewey.info/class/6/2009-03/about.de.html
http://dewey.info/class/6/e22/about
http://dewey.info/class/641.5/a14/about (Generate an SVG label for this class.)
http://dewey.info/class/641.5686/e23/about
http://dewey.info/class/641.5686/e23/2012-06-12/about.en.rdf
A general overview of the service can be found here, a slightly more technical description is available on the OCLC Developer Network. Or just dive in by clicking on one of the main classes above.