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While wireless sensor networks (WSNs) have been traditionally tasked with single applications, we have witnessed the emergence of multiapplication paradigms in the sensor network field such as Shared Sensor Networks and Virtual Sensor Networks. As the number of applications in a WSN increases, it also increases the WSN complexity and the amount of required transmitted messages. A major requirement in these networks is to save energy in order to extend their operational lifetime. Among the methods employed to extend network lifetime, Multisensor data fusion (MDF) is one of the most widely used. This technique can be very important when applied in a heterogeneous network (a common case for multiapplication WSNs). In a heterogeneous network data streams may come from very different contexts and may have distinct representations. Traditional MDFs are not able to identify these different contexts …