This part of ISO/IEC 18012 specifies a taxonomy and application interoperability model for the interoperability of products in the area of home systems. It also specifies an interoperability framework to allow products from multiple manufacturers to work together in order to provide a specific application. This standard describes an application process that exists above the OSI reference model (ISO/IEC 7498-1) stack, with sufficient detail needed to establish interoperable applications in this domain. This International Standard is applicable to • single implementation home electronic system networks, connected devices and applications. Such a system is created when all the home system components comply with a single standard or manufacturer specification, • multiple implementation home electronic system networks, connected devices and applications. Such a system is created when different home system components comply with different HES standards or manufacturer specifications, • automatically configured devices, • manually configured devices, • manually configured groups/clusters of devices. This International Standard applies to application objects in operation within networks, between networks and to components located at the junction of dissimilar networks. Two (or more) dissimilar networks that conform to this International Standard, when linked by some communication system, are expected to behave as if both networks were logically the same network from an application perspective. Interoperability considerations regarding general management processes in HES are described in ISO/IEC 18012-1. This part of ISO/IEC 18012 addresses only the management aspects related to the operation mode of interoperable HESs and does not cover the management processes of individual constituent networks.