PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Infrared (IR) imaging is the best method for detecting leaks of pollutant gases, but current technology based on cooled IR imagers is far too expensive ($75,000 to $150,000) for everyday field use by those who need it to meet regulatory limits???electric and petrochemical utilities, manufacturing plants, and businesses such as supermarkets.
http://www.w3.org/ns/prov#wasQuotedFrom
  • epa.gov