<https://jwg-it.eu/article/regdelta-alert-no-3-changes-to-the-pra-rulebook/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://jwg-it.eu/article/regdelta-alert-no-3-changes-to-the-pra-rulebook/>