PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • They are written in an XML-based language called Keyhole Markup Language, or KML. Various KML elements describe points on the globe, 3D objects, tracks through space, or other items, and a series of Google-specific KML extensions can define an automated tour in which Google Earth flies through these objects.Now for a bit of dogma: writing large volumes of XML by hand is a drag.
http://www.w3.org/ns/prov#wasQuotedFrom
  • endpoint.com