<https://www.itespresso.de/2010/05/07/itespresso-podcast-nr-59-vom-07-mai-2010/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.itespresso.de/2010/05/07/itespresso-podcast-nr-59-vom-07-mai-2010/>