<https://blog.render.com.br/cad-e-cae/o-que-nos-espera-no-novo-autocad-2012/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.render.com.br/cad-e-cae/o-que-nos-espera-no-novo-autocad-2012/>