PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The Future of the SEM Industry While Google made the most recent attempt at setting standards for ethical SEO practices, there is significant pushback from SEO vendors who feel the statements made within the document are a step in the right direction, but contradictory to the point of buyer confusion.
http://www.w3.org/ns/prov#wasQuotedFrom
  • searchenginewatch.com