PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It???s not just Haiti, economists in general don???t study informal economies what some call System D. Most economists dismiss the informal activity as not very relevant, but some estimate, that in some parts of the world, most economic activity is off the books, and not part of what is called the formal economy.
http://www.w3.org/ns/prov#wasQuotedFrom
  • marginalrevolution.com