PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • After you enter a crystal (ex 3:15), and I would say even in the rest of the cases(not obvious though) you have some simplistic but textured 3d geometry (I just assume it would be easier than to mix in a 2d background with 3d objects (monsters, character, crystals) in the front). 3d is an extension to 2d, so what you can make in 2d you can make in 3d too and more(you could just use a textured quad
http://www.w3.org/ns/prov#wasQuotedFrom
  • gamedev.net