PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Simply put, on-page optimization is concerned with everything that can be done to boost your ranking in the search engine results pages (SERPs) on the webpage itself.Off-page optimization deals with aspects that take place elsewhere such as the quality and relevance (though not these days the sheer numeric volume) of your back-links.
http://www.w3.org/ns/prov#wasQuotedFrom
  • searchenginejournal.com