PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Astronomers have learned much about the universe by observing the different kinds of electromagnetic radiation that exist in nature (see Figure 2.1).
http://www.w3.org/ns/prov#wasQuotedFrom
  • nap.edu