<https://fr.regulatingrelations.com/129-symbol-of-infinity-what-is-it-and-what-does-it-mean>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://fr.regulatingrelations.com/129-symbol-of-infinity-what-is-it-and-what-does-it-mean>