PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, higher crystal quality demanded by electronic, optical and other applications, and the need for sizes and shapes not possible by flame-fusion, impelled the development of other ways to make sapphire.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sdmaterials.com