<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebSite>
<https://www.exchangewire.com/blog/2013/03/18/premium-publishers-are-in-the-audience-business-not-the-ad-impression-business-by-petteri-vainikka-cmo-enreach/>