Situational Data-Analytics for the Web-of-Things

The proliferation of web-accessible sensors and actuators provided by smart things and mobile devices has led to a distinct class of WoT-applications. These are data-driven and situational as they build on the analytical processing of data streams from specific devices in the user context. Promising approaches for supporting such applications have emerged that enable a) the compositional specification of device stream processing and b) the distributed execution of processing pipelines on edge devices. In this paper we report on experiences of applying one such approach in order to realize our vision for scenarios of situational WoT-applications. We discuss the requirements of these advanced scenarios and propose possible future directions for features and architectural approaches of a WoT-platform.