PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Given the unprecedented distance and duration of such missions, determining the minimum acceptable net habitable volume for required vehicles remains a challenge, particularly since there have been no universally accepted a priori criteria for judging adequate volume limits for proposed design reference mission???s parameters.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nasa.gov