<https://blog.domini.it/post/1131/telnic-announcia-la-data-di-lancio-per-gli-idn/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.domini.it/post/1131/telnic-announcia-la-data-di-lancio-per-gli-idn/>