PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Those layers are treasure troves of information about the environment that existed on Mars when they were laid down, and in the geologic eras after that when the rocks were affected by weathering and other processes.
http://www.w3.org/ns/prov#wasQuotedFrom
  • thespacewriter.com