PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A whole new dimension of thinking about what kind of behaviors should or could go in there.+ Since everything is an object, including integers, strings, and any custom value objects you create, is the Null Object pattern still needed?+ You can at run time evaluate Ruby code stored as a string very easily, without rolling your own parser.
http://www.w3.org/ns/prov#wasQuotedFrom
  • infoq.com