PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • 1) Google and other SEs still crawl nofollow links - they have said that - the attribute is only a way to indicate that the link is paid or not trusted.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sphinn.com