PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • One common source of expensive defects is requirement gaps, e.g., unrecognized requirements which result in errors of omission by the program designer.[6] Requirement gaps can often be non-functional requirements such as testability, scalability, maintainability, usability, performance, and security.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org