PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • I assure you if you were to add the google apps MX records to another domain, it checks it across all domains, maybe missing a if() check (be warned, I am not adaquate in PHP or any other language other than C and C++ )
http://www.w3.org/ns/prov#wasQuotedFrom
  • howtoforge.com