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EON
Enhanced Other Networks information: This feature can be used to update the information
stored in a receiver about program services other than the one received. The alternative frequencies-
PS name, Traffic Program and Traffic Announcement identification as well as Program Type and
Program Item Number information can be transmitted for each other service. The relation to the
corresponding program is established by means of the relevant Program Identification. Linkage
information, consisting of four data elements, provides the means by which several program
services may be treated by the receiver as a single service during times a common program is
carried. Linkage information also provides a mechanism to signal an extended set of related
services.
EWS
Emergency Warning System: The EWS is intended to provide coding for warning messages.
These messages will be broadcasted only in case of emergency and will be evaluated by special
receivers.
IH
In House application: This refers to data to be decoded only by the operator. Some examples
noted are identification of transmission origin, remote switching of networks and paging of staff.
The applications of coding may be decided by each operator itself.
M/S
Music / Speech Switch: This flag simply indicates whether music or speech is the primary
broadcast programming. The purpose of this function is not well explained in the respective
Standards; hence it comes as no surprise that it is not widely used.
ODA
Open Data Applications: The Open Data Applications feature allows data applications, not
previously specified in EN 50067, to be conveyed in a number of allocated groups in an RDS
transmission. The allocated groups are indicated by using type 3A group which is used to identify
to a receiver the data application in use in accordance with the registration details in the EBU/RDS
Forum - Open Data Applications Directory and the NRSC Open Data Applications Directory.
PI
Program Identification: This block of data identifies the broadcast station with a hexadecimal
numerical code, which becomes the “digital signature” of the station. The code is assigned by the
broadcasting authorities in most countries, but in the US it is calculated from a numerical encoding
of station call letters. The receiver processes the PI code to assist automatic tuning features (station
memories), and to prevent false switching to alternative frequencies that might be shared by
broadcasters in nearby regions.
PIN
Program Item Number: The code enables the designed to use this feature receivers and recorders
to respond to the preselected by the user program item(s).This feature is used via scheduled program
time, to which in order to avoid ambiguity is added the day of the month.