Oracle: PROPS$

PROP$ vs X$PROP

select
   nvl(x.name, b.name) name,
   substr(x.value$, 1, 30)      val_x$,
   substr(b.value$, 1, 30)      val_base_tab
from
   sys.x$props  x                              full outer join
   sys.props$   b on x.name = b.name;

See also