<https://www.italiamac.it/forum/topic/24341-desktop-22-continuazione/page/63/#comment-763212>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.italiamac.it/forum/topic/24341-desktop-22-continuazione/page/63/?tab=comments#comment-762226>