((output
  (((f.ml (1 0) (1 11)) (@author Foo))
   ((f.ml (2 0) (2 7))
    (2
     (label
      ((root (f.ml (page f.ml) 00000000000000000000000000000000) f.ml)
       (label bar)))
     (((f.ml (2 3) (2 6)) (word Bar)))))))
 (warnings
  ( "File \"f.ml\", line 2, characters 0-2:\
   \n'{2 ...}' (section heading) is not allowed in the tags section.\
   \nSuggestion: move '{2 ...}' (section heading) before any tags.")))
