PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • PVC membrane should conform to CGSB 37-GP-54M 1979, ???Roofing and Waterproofing Membrane, Sheet Applied, Flexible, Polyvinyl Chloride??? which lists two types of membrane, according to manufacture:
http://www.w3.org/ns/prov#wasQuotedFrom
  • rcabc.org