PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This site contains a basic explanation of the rock cycle along with information on the difference between a rock and a mineral and a description of the three types of rocks (igneous, metamorphic, and sedimentary).
http://www.w3.org/ns/prov#wasQuotedFrom
  • dlese.org