PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The problem relates in particular to magnesium and magnesium alloys that are considered the most attractive materials for hydrogen storage.
http://www.w3.org/ns/prov#wasQuotedFrom
  • spacedaily.com