PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Safari and other WebKit-based browsers such as Chrome include the word ???gecko??? in their user-agent strings on the assumption that web sites that look for ???gecko??? in the UA string do so not because they???re trying to serve specific content only to actual Gecko-based browsers, but because they???re trying to serve specific content only to browsers with Gecko-like rendering features.
http://www.w3.org/ns/prov#wasQuotedFrom
  • daringfireball.net