PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In general, one combines both term algebras and relational algebras, so that one writes things like 3<f(x,y) where f(x,y) is a term, < is a relation, 3 is a constant.
http://www.w3.org/ns/prov#wasQuotedFrom
  • opencog.org