PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • By using the mask concept you saw in the previous example, some people have created icons that can change color, using only CSS. The idea is both simple and ingenious: place a transparent image with the icon symbol ???punched-out??? over a square, rectangle, or other shape with a flat-color CSS background, and you???ve got yourself an icon.
http://www.w3.org/ns/prov#wasQuotedFrom
  • digital-web.com