% pandoc -t native
Note[^1].

[^1]: the first note.

[^2]: the second, unused, note.
^D
[WARNING] Note with key '2' defined at line 5 column 1 but not used.
[Para [Str "Note",Note [Para [Str "the",Space,Str "first",Space,Str "note."]],Str "."]]