  An important use of sensors and actuator networks is to comply with health
and safety policies in hazardous environments. In order to deal with
increasingly large and dynamic environments, and to quickly react to
emergencies, tools are needed to simplify the process of translating high-level
policies into executable queries and rules. We present a framework to produce
such tools, which uses rules to aggregate low-level sensor data, described
using the Semantic Sensor Network Ontology, into more useful and actionable
abstractions. Using the schema of the underlying data sources as an input, we
automatically generate abstractions which are relevant to the use case at hand.
In this demonstration we present a policy editor tool and a simulation on which
policies can be tested.
