Cases of "non specified" or optional objects (which may arguably be analysed at the lexical level) are not taken into account. Thus, the annotation does not include the NP-ACC position in sentences where a transitive verb is used as an intransitive (e.g. cantar, comer, fumar, ler, etc.) - in these cases, the object's content usually corresponds to a canonical or generic kind of object, in a way that is invariable across cultures.

( (IP-MAT (NP-SBJ *pro*)
	  (VB-D comeo)
	  (PP (P sem)
	      (NP (N fastio)))
	  (, ,))
  (TYCHO BRAHE; ID C_002,223.1159))

None the less, two kinds of null objects are annotated in the CORDIAL-SIN corpus and in the Brazilian texts of the Tycho Brahe corpus: