PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This module provides a clone() method which makes recursive copies of nested hash, array, scalar and reference types, including tied variables and objects. clone() takes a scalar argument and duplicates it.
http://www.w3.org/ns/prov#wasQuotedFrom
  • metacpan.org