The purpose of the new ISO standardised data model is to increase the interoperability between RFID systems provided by a range of suppliers. Unfortunately at this stage, there is no interoperability between UHF based systems and systems built around HF technology. This lack of interoperability goes well beyond the data model and involves 12 issues of fundamental technology. Also, the reality today is that the overwhelming majority of currently installed RFID systems around the world are based on HF platforms, particularly ISO/IEC 18000-3 Mode 1.