<https://secure.gravatar.com/avatar/cbde936a4564b8405755d4055c5e0270?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.nicesss.com/archives/mij/photochips/135888.html>