DIN CLC/TS 50459-4 Railway applications - Communication, signalling and processing systems - European Rail Traffic Management System - Driver-Machine Interface - Part 4: Data entry for the ERTMS/ETCS/GSM-R systems; German version CLC/TS 50459-4:2005

standard by Deutsches Institut Fur Normung E.V. (German National Standard), 01/01/2008