<https://forum.immigrer.com/topic/174109-contrat-de-travail-qualifie/#comment-1265351301>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.immigrer.com/topic/174109-contrat-de-travail-qualifie/?tab=comments#comment-1265351307>