PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • When a new currency unit is instituted at any time other than January 1, the exchange rate is expressed in the unit ruling during the greater part of the year; the full-year exchange rate experience is incorporated (data permitting), via conversion of the unit pertaining to the lesser part of the year.
http://www.w3.org/ns/prov#wasQuotedFrom
  • measuringworth.com