PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Whether using laser, electron beam, extrusion, or jetting to control deposition, all of these technologies are currently being used for DDM. Depending on the machine, materials are available in several forms, including liquid, powder, sheet, and filaments.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sme.org