<https://uniarea.com/forum/index.php?threads/trajar-sem-ir-%C3%A0-praxe.40114/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://uniarea.com/forum/index.php?threads/trajar-sem-ir-%C3%A0-praxe.40114/>