Sensor Observation Service (SOS) provides access to sensor information (SensorML) and measured sensor observations (O&M)

Sensor Alert Service (SAS) enables real-time alerting using a pub/sub paradigm

Sensor Event Service (SES) an enhancement and the further development of the SAS.

Sensor Planning Service (SPS) tasks sensors or sensor systems

Web Notification Service (WNS) supports asynchronous notification of sensor events (tasks, observation of phenomena)

Sensor Instance Registry (SIR) provides functionality for discovering and managing sensors as well as SWE services.

Sensor Observable Registry (SOR) provides an interface for managing the definitions of phenomena measured by sensors as well as exploring semantic relationships between these phenomena.

Sensor Web Clients