<https://www.creativebloq.com/web-design/physical-web-arrives-heres-why-it-will-change-your-life-111413518>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.creativebloq.com/web-design/physical-web-arrives-heres-why-it-will-change-your-life-111413518>