<https://www.metal-interface.fr/articles-news/c/robot-de-soudage/Metal-interface>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.metal-interface.fr/articles-news/c/robot-de-soudage/valk-welding-strong-connection-le-lien-fort-au-dela-de-lautomatisation>