<http://schema.org/description>
"In a DigitalPoint Forums thread, a member asks how to check for an invalid PageRank.  This is a timely question given that there was a PageRank update earlier this week.  Since you can fake your PageR"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/013352.html>