Abstract
The concept of Internet of Things (IoT) will play an essential role in future applications aimed at optimisation of energy consumption. Interoperability of IoT applications can be achieved by usage of data models that explicitly determine the structure of information exchanged between applications. This paper presents a layered approach to modelling semantic information for IoT applications aimed at improving energy efficiency. Physical system is modelled as things that can be observed and actuated. The observations and actuations are context-aware and may be used to control processes in the physical system. The purposive usage of observations and actuations is defined as a service model exposing generic capabilities that can be shared across different applications. The service model is described by RESTful web services for power control. The potential of web services for home appliance energy efficiency is estimated.
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