__PACKAGE__->default_search_class( 'keyword' );
-# XXX to become magic filters
-__PACKAGE__->add_search_filter( 'audience' );
-__PACKAGE__->add_search_filter( 'vr_format' );
-__PACKAGE__->add_search_filter( 'item_type' );
-__PACKAGE__->add_search_filter( 'item_form' );
-__PACKAGE__->add_search_filter( 'lit_form' );
-__PACKAGE__->add_search_filter( 'bib_level' );
-
# will be retained simply for back-compat
__PACKAGE__->add_search_filter( 'format' );