PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Unity 2.0 now supports point lights, directional lights and spotlights, and even alpha-textured objects will cast accurate shadows.Unity???s GUI creation system has been reworked wit dozens of object types including buttons and text labels, available in a CSS-style layout.
http://www.w3.org/ns/prov#wasQuotedFrom
  • macworld.com