1
int_pt = "tas"
2
char_pt = "ftyp"
3
string_pt = "adep" | "ades" | "rwy" | "atyp" | "copx"
4
| "copn" | "frul" | "rfl" | "travel_type"
5
string_array_pt = "route"
6
char_array_pt = "equip"