This specification defines the IPTV Content on Demand (CoD) service metadata and transaction protocols for each interface defined in ATIS-0800042@ IPTV Content on Demand Service. Interfaces defined as out of scope in ATIS-0800042 will not be defined in this specification. Purpose The purpose of this document is to define the metadata and transaction protocols for the functions defined in ATIS-0800042@ IPTV Content on Demand Service [1].