Metadata URI https://data.nasa.gov/ontologies/atmonto/NAS# Namespace https://data.nasa.gov/ontologies/atmonto/NAS# isDefinedBy https://data.nasa.gov/ontologies/atmonto/NAS.ttl Description Defines concepts related to the structure of the US National Airspace System (NAS) @en Language Creator Richard M. Keller mailto:rich.keller@nasa.gov Publisher NASA https://www.nasa.gov/ Comment (2018-04-19) Pierre-Yves Vandenbussche: Another NASA vocabulary for the description for the description of concepts such as air carrier, RNAV routes or airport used by US National Airspace System (NAS)