PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Titrations often use visual indicators, such as a color change in the reactant mixture, to indicate the endpoint of a reaction.
http://www.w3.org/ns/prov#wasQuotedFrom
  • labtesting.com