PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • While some keyword research can be provided via existing tools, such as wordtracker, overture, and the Google Adwords sandbox tool, these tend to provide blunt approximations that may be quite skewed from current realities.
http://www.w3.org/ns/prov#wasQuotedFrom
  • internetbusiness.co.uk