PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The alumina film 240 on the innermost surface of the laminated RF window 100' of FIG. 2 protects the titanium layer 200 from highly-corrosive/etch precursors, including fluorine, chlorine, and other halogens as well as oxidizing gases such as oxygen or nitrogen dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com