select tab_name, tab_refer  from sys_tables
	where sys_tables.tab_name !match 'sys_*';

select tab_name, attr_name
	from sys_tables, sys_attrs
	where sys_tables.tab_name !match 'sys_*'
	and sys_tables.tab_number = sys_attrs.attr_tabnum
	group by sys_tables.tab_name sort by 1;
