PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • We could make substitution an operation, in which case it must be defined inductive-recursively with the types Context, Ty, and Tm.
http://www.w3.org/ns/prov#wasQuotedFrom
  • homotopytypetheory.org