<https://calacanis.com/2004/02/24/the-vcard-or-rss-of-events-esf-event-sharing-framework/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://calacanis.com/2004/02/24/the-vcard-or-rss-of-events-esf-event-sharing-framework/>