<https://techblog.gr/techtv/programmatizomena-tilecheiristiria-2-in-1-edision-how-to/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://techblog.gr/techtv/programmatizomena-tilecheiristiria-2-in-1-edision-how-to/>