PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Sulfates from two dissimilar metals, such as copper and zinc, are brought into contact so that the chemical reaction created causes electrons to flow from one point of contact to another.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wisegeek.net