PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The 13 chapters of the second part cover the nature of the sphere, as well as significant astronomical and trigometric calculations based on it.During the 14th-16th centuries, the Kerala school of astronomy and mathematics made significant advances in astronomy and especially mathematics, including fields such as trigonometry and calculus.
http://www.w3.org/ns/prov#wasQuotedFrom
  • reference.com