Dramatic development of the wireless sensor networks (WSNs) in several applications is seeking for multi-application implementation of such networks. In this way, the middlewares contain a runtime environment that supports and coordinates multiple applications. In this paper, a middleware is proposed to support multi-application network that simultaneously satisfies the quality of service (QoS) requirements of users, that is the response time and data accuracy, and that of network that is optimizing the network resources (i.e. energy) utilization. Organizing nodes into clusters and preparing them to efficiently report data of any detected event, the middleware features an inheritance pattern among nodes that trains them to support multiple events. More over, employing the Data Integration among nodes not only reduces the energy consumptions for data reporting but also increases the data accuracy of every detected event.

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