PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is therefore an object of the invention to provide an electronic mail program which includes integrated authoring/reading software whereby different kinds of documents may be created, sent, received, and opened by electronic mail in a seamless manner.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com