This read-create INTEGER points to the specific Policy Map that a given policy-to-class reference row belongs to, tying a referenced class map into that policy. An admin builds up a policy map's contents by creating reference rows, each pointing back to the policy map via this field while another field identifies the specific class map being included. For example, to add the 'VOICE' class map into the 'UPLINK-QOS' policy map, the admin creates a reference row with this pointer set to the UPLINK-QOS policy's index.