Reporting Road Problems in Smart Cities Using OpenIoT Framework - Interoperability and Open-Source Solutions for the Internet of Things - page 175

Fig. 5. Report list, report details

Fig. 6. OpenIoT middleware with CityWatcher application

We use Global Sensor Network (GSN) to provide middleware functionality for
registering and nding ICOs. x-GSN (Global Sensor Network) is a part of OpenIoT

platform and is used for managing virtual sensors and wrappers, processing classes,
distributed processing storage and services [ 27 ].
Linked Sensor Middleware (LSM) is a central component of OpenIoT. It takes data
from virtual sensors and transforms it to Linked Data format like RDF. If ontologies are