PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Items that have no variation, e.g. base or root $variation0num = 1;  // how many loops to iterate/parse.
http://www.w3.org/ns/prov#wasQuotedFrom
  • processwire.com