text: alter table category_tree_map add (
  	assign_single_p		char(1) default 'f' constraint cat_tree_map_single_p_ck check (assign_single_p in ('t','f')),
  	require_category_p	char(1) default 'f' constraint cat_tree_map_categ_p_ck check (require_category_p in ('t','f'))
  );
  
  comment on column category_tree_map.assign_single_p is '
    Are the users allowed to assign multiple or only a single category
    to objects?
  ';
  
  @@../category-tree-package.sql
  