A spatial representation in the sense of Davis's SCM, associated with spatial_pattern.

some_spr set_keys key_rep...

Set the dimensions of some_spr to be the same as those of key_rep, a keyed_representation, and associate key_rep with this representation (e.g., for the purposes of setting up a blocked_localist_to_spatial_conversion.

some_spr key_rep

Return the keyed_representation set with set_keys.