[adaptation_field_data_descriptor.DataIdentifier]
# Bit field
Bits = 8
0x01 = Announcement switching data field (ETSI TS 101 154)
0x02 = AU_information data field (ETSI TS 101 154)
0x04 = PVR_assist_information_data_field (ETSI TS 101 154)
0x08 = tsap_timeline (DVB BlueBook A167-2)
0x10 = reserved_0 for future use
0x20 = reserved_0 for future use
0x40 = reserved_0 for future use
0x80 = reserved_0 for future use
