When you encode radio frequency identification (RFID) tags, what data should you encode to them? This is a common question from end users and resellers of RFID solutions. Many people have been influenced by the use of RFID in the retail space, and because  GS1 standards are prevalent in retail, people often wrongly conclude that all encodings for all applications are GS1-based. This is not true.

source: https://www.rfidjournal.com/an-introduction-to-iso-based-rfid-encodings