<https://support.emsisoft.com/topic/32826-no-key-for-new-variant-online-id/page/5/#comment-220305>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Comment>
<https://support.emsisoft.com/topic/32826-no-key-for-new-variant-online-id/page/5/?tab=comments#comment-219979>