When doing grammar development, this command lets you display the list of features associated with a given syntactic category. It requires a grammar to be loaded. Here is an example with the English grammar: \begin{verbatim} >> CAT np (Display information for specified category)

Features for category "np": [agr,case,conj,def,gapsin,gapsout, nform,pronoun,sem,sem_n_type,takes_attrib_pp,takes_frequency_pp, takes_loc_pp,takes_partitive,takes_post_mods,takes_to_pp, takes_with_pp,wh] \end{verbatim}