PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It???s a kind of a scary word, although the idea is very simple: there is a design pattern that emerged in the functional programming community, but they recognized that certain kinds of things like the maybe type, which has an equivalent in Scala of the option type, and lists are sequences, and stateful IO as well as asynchronous computation share an interface in common.
http://www.w3.org/ns/prov#wasQuotedFrom
  • infoq.com