PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ut writes to that value having any effect ???; do not rely in this behavior, though, as the reference count is an implementation detail and the soundness of this behavior is questionable??????
http://www.w3.org/ns/prov#wasQuotedFrom
  • php.net