PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For instance, there are only two particularly interesting numbers involved in buying print advertising (circulation and the price of the ad), whereas the metrics for a Web ad (traffic, rotation, cost per click, click-through rates, impressions, uniques, etc), give staffs of ambitious white-collar employees endless things to do with spreadsheets and Powerpoint.
http://www.w3.org/ns/prov#wasQuotedFrom
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