sawine@1: int_pt           = "tas"
sawine@1: char_pt          = "ftyp"
sawine@1: string_pt        = "adep" | "ades" | "rwy" | "atyp" | "copx" 
sawine@1:                    | "copn" | "frul" | "rfl" | "travel_type"
sawine@1: string_array_pt  = "route"
sawine@1: char_array_pt    = "equip"