PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • the guava Preconditions class has more specialized methods for checking various types of conditions; I only used Preconditions.checkArgument() so that the exact type of exception thrown does not change (for example some of the other methods throw NullPointerException instead of IllegalArgumentException)
http://www.w3.org/ns/prov#wasQuotedFrom
  • apache.org