PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • To ensure that keys (paths) to variables are not simply named arbitrarily, some naming conventions apply, these can be mostly deduced from existing properties, such as for example appending a suffix to make properties more self-explanatory by indicating what unit the properties is provided in (e.g. deg, rad, hz, ft, nm).
http://www.w3.org/ns/prov#wasQuotedFrom
  • flightgear.org