EPC Tag Classification for RFID

Photo: GS1 EPCglobal RFID

RFID uses a numbering scheme called EPC (Electronic Product Code) which can provide unique ID for any physical object. 

Currently, there are 4 classes in GEN2 with different tags and applications:-
Class 1: Identity Tags
Class 2: Higher Functionality Tags
Class 3: Semi-Passive Tags
Class 4: Active Tags