Domain Constraints

Any thoughts on how to display the domain constraints in psql?

a=# create domain d as integer not null check (value > 4);
CREATE DOMAIN
a=# create domain f as text check (value > 'bob') check (value < 'zip');
CREATE DOMAIN
a=# \dD
List of domains
Schema | Name | Type | Modifier
--------+------+---------+----------
public | d | integer | not null
public | f | text |
(2 rows)

Any thoughts on how to display the check constraints?

--
Rod Taylor