PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Second, empty space is not empty: What we call a vacuum is actually seething with all kinds of energy fields, and the energy is constantly manifesting itself as virtual particles that pop into existence and then disappear again in something less than a trillionth of a nanosecond.
http://www.w3.org/ns/prov#wasQuotedFrom
  • discovermagazine.com