PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • If any one doubt this, he has only to consider what an experiment, such as would in physical science be accounted a sufficient ground for a sound induction, really implies; that it implies the possibility of finding or producing a set of known conditions as the medium in which the experiment is performed, and which, shall remain constant during its performance.
http://www.w3.org/ns/prov#wasQuotedFrom
  • econlib.org