PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The article below was a neat summary showing a linear drop in the cost of Solar and accompanying exponential growth in demand/production (same for storage batteries):
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleantechnica.com