PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Chemical acid etching and photo etching are two main measures to make etched perforated metal mesh, screens, grids, business cards, nameplates and encoder disks and other items.
http://www.w3.org/ns/prov#wasQuotedFrom
  • acidetchingmetal.org