<http://schema.org/description>
"A recently granted patent named ranking documents can be looked at as if it was a Penguin patent or maybe a patent on how to trick SEOs into thinking their pages are ranking or maybe both.Bill Slawski"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-patent-spam-15589.html>