PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • They are most often used with high purity gases (> 99.999% or purity grade 5.0) when higher flow rates are required and cost is the most important issue.
http://www.w3.org/ns/prov#wasQuotedFrom
  • praxair.com