PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Allocating something empty and checking with type() is improper not just because of the useless object's instance, but even because you can not check, for example, if your object is a file without creating a file on filesystem (type(file()) fails because file() requires at least an argument)
http://www.w3.org/ns/prov#wasQuotedFrom
  • stackoverflow.com