array of composite types - how can I launch this function with an array of composite values

I have a composite type, like
--
CREATE TYPE requirement_vo AS (
name VARCHAR(20),
description VARCHAR(20),
requirement_id INT,
requirement_type_id INT,
priority_id INT,
necessity_id INT,
lower_limit DOUBLE PRECISION,
upper_limit DOUBLE PRECISION
);
--
and I have a function
--
CREATE OR REPLACE FUNCTION add_position(rs requirement_vo[] )
--

Code like this
--
SELECT * FROM add_position('{("name", "descr", "req_id", "req_type_id",
"priority_id", "nec_id", 2.1321, 1.2323)}');
--
returns "ERROR: malformed array literal: "{("name", "descr", "req_id",
"req_type_id",
"priority_id", "nec_id", 2.1321, 1.2323)}"
SQL state: 22P02
"

So the question is - how can I launch this function with an array of
composite values?
Documentation (http://www.postgresql.org/docs/8.3/interactive/arrays.html)
says "Arrays of ... or composite type can be created."

Nikita Koselev