1. A reception apparatus, comprising: circuitry configured to receive a data stream including a service table, the service table including an entry of a first service type, and the entry including a parameterized service descriptor (PSD), determine whether a second service type identified by an application tag defined in the PSD and associated with the entry is supported by the reception apparatus, and when the second service type identified by the application tag defined in the PSD and associated with the entry is supported by the reception apparatus, parse application data defined in the PSD according to syntax and semantics that are determined to be associated with the second service type identified by the application tag, wherein the syntax and semantics of the application data are application-specific, and the application tag identifies the specific application to which the application data applies.