Working with VARRAY in PL/SQL

Hi:

    I need to use a VARRAY in a stored procedure and need some help. I have a 'site' table that refers to a 'priceplan' table which has a VARRAY that I need to make comparisons against. I have tried a number of things to look at each of the 'rate_t' objects in the ratetable VARRAY, but am not getting the syntax correct. Below is a description of the pertinent tables/fields/objects.

    How do I look at each of the 'rate_t' objects in a given ratetable if I know the correct record to use in the pricplan table (I know the SID and therefore the PPID).

    Any help is greatly appreciated. Thanks! - Rolf

Site table:

SID                                     NOT NULL NUMBER(8)
PPID                                    NOT NULL REF OF PRICEPLAN_T

Priceplan table:
PPID                                    NOT NULL NUMBER(8)
RT_CONTINUOUS                         NOT NULL RATETABLE
RT_EVENT                                NOT NULL RATETABLE
RT_PEAK                                 NOT NULL RATETABLE

ratetable VARRAY(20) OF RATE_T
 RATELEVEL                                        NUMBER(3)
 CHARGE                                           NUMBER(15,2)