<https://secure.gravatar.com/avatar/e9523bb68c638e5e771d1753c1daa0d6?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.companionlink.com/blog/2018/11/dejaoffice-pc-crm-nov-9-update/>