PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In the US the makeup of fracking fluids can remain unknown under commercial sensitivity laws, but UK rules include better disclosure on what chemicals are being used, allowing them to be vetted for toxicity and other hazardous properties.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ecomena.org