<https://blog.desdelinux.net/tercera-parte-lmde-a-fondo-optimizando-aun-mas/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.desdelinux.net/mr/tercera-parte-lmde-a-fondo-optimizando-aun-mas/>