PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is compatible with several operating systems including Microsoft Windows, Mac OS X, Chrome OS, Linux, and FreeBSD. An iPhone version was released on June 19, 2009 and an iPad version was released in May 2010 as well.
http://www.w3.org/ns/prov#wasQuotedFrom
  • mashable.com