domain type and array, is it possible?

Hello

Can I use domain in array. I want to save "xml normalized string"
into array.

CREATE OR REPLACE FUNCTION normString(varchar) RETURNS bool AS '
SELECT $1 !~ ''[\r\t\n]'';
' LANGUAGE sql;

CREATE OR REPLACE FUNCTION chLength(varchar, integer, integer) RETURNS
bool AS '
SELECT length($1) BETWEEN $2 AND $3;
' LANGUAGE sql;

CREATE DOMAIN optPostalLineType AS varchar(255)
CHECK(normString(value) AND chLength(value, 255));

CREATE TABLE addresses (
id serial primary key,
tbl char(1) NOT NULL CHECK (tbl IN ('s')),
type postalInfoEnumType,
street optPostalLineType[3] NULL,
city postalLineType,
zip zipType,
country countryType NULL
)

but I get message ERROR: type "optpostallinetype[]" does not exist.
Is it possible combine DOMAIN and array?

Thank You
Pavel Stehule
p.s. I use CVS PostgreSQL