PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The first argument to the keytree.element function is an XML context, the created element will have the same namespace as that element:
http://www.w3.org/ns/prov#wasQuotedFrom
  • python.org