Identically adopts ISO/IEC 21823 1:2019, which provides an overview of interoperability as it applies to IoT systems and a framework for interoperability for IoT systems. It enables IoT systems to be built in such a way that the entities of the IoT system are able to exchange information and mutually use the information in an efficient way and peer-to-peer interoperability between separate IoT systems. KEYWORDS: Interoperability; Internet of Things; System framework.