<https://www.corsi-cad.it/corsi-autocad-inventor-revit-maya-3ds-map-lisp/maya/maya-avanzato-character-rigging-animation>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.corsi-cad.it/corsi-autocad-inventor-revit-maya-3ds-map-lisp/maya/maya-avanzato-character-rigging-animation>