PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • U.S. Pat. Nos. 4,901,221 and 4,914,568 to Kodosky et al disclose a graphical system where the wires or connectors between nodes have different widths and colors corresponding to the different types of data propagating along the wire.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com