PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A visible range spectrometer detects selected color contaminants while a near-infrared (NIR) spectrometer simultaneously identifies materials such as PET, HDPE (high-density polyethylene), PP (polypropylene), PVC (polyvinyl chloride), PS (polystyrene) and PL A (polylactic acid).
http://www.w3.org/ns/prov#wasQuotedFrom
  • recyclingtoday.com