PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This Boring Headline Is Written for Google is an interesting look from the New York Times about how newspapers are learning to adapt to search engines, in particular to ensure headlines are targeted toward using terms that people are searching for, rather than grabbing attention but being non-descriptive.
http://www.w3.org/ns/prov#wasQuotedFrom
  • searchenginewatch.com