  Ontologies provide conceptual abstractions over data, in domains such as the
Internet of Things, in a way that sensor data can be harvested and interpreted
by people and applications. The Semantic Sensor Network (SSN) ontology is the
de-facto standard for semantic representation of sensor observations and
metadata, and it is used at the core of the open source platform for the
Internet of Things, OpenIoT. In this paper we present a Schema Editor that
provides an intuitive web interface for defining new types of sensors, and
concrete instances of them, using the SSN ontology as the core model. This
editor is fully integrated with the OpenIoT platform for generating virtual
sensor descriptions and automating their semantic annotation and registration
process.
