PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hazen (1997) pointed out that the key to understanding why science is an endless frontier lies not in cataloging what we know, but rather recognizing the vast amount of what remains unknown--the unanswered questions.
http://www.w3.org/ns/prov#wasQuotedFrom
  • missouri.edu