PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The substantially horizontally lines may be chosen at angle ??=ninety degrees (90???)???X degrees, which X is an acceptable angular deviation from the horizontal position to allow for the inclusion of substantially horizontal lines.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com