<https://blog.p2pfoundation.net/hornet-onion-routing-at-network-level/2015/07/28#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.p2pfoundation.net/hornet-onion-routing-at-network-level/2015/07/28>