_:n77df5946d77d4aea83b7cfdc8e0fa4afxb2
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://icube-forge.unistra.fr/cazier/cgogn/-/blob/d2336a451c3b9ea9f6a286a566901156cce134e4/Apps/Examples/viewer.cpp>