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334 Semantic as an Interoperability Enabler in Internet of Things<br />

Fig. 9.8 Digcovery architecture.<br />

the interfaces with the client applications/users through Web Services such as<br />

Restful or through Enterprise communications interfaces such as JSON/XML<br />

or specific interfaces for third party platforms such as the presented example of<br />

Global Sensor Network (GSN) platform used in the OpenIoT EU FP7 Project.<br />

The dark blue components present the key components designed, proposed<br />

and developed in order to provide a homogenous an interoperable environment<br />

to discover, look-up and register services and resources. The main element is<br />

the digcovery, which is the global discovery platform. This platform is used<br />

to locate the different domains and the wide deployed directories with the different<br />

resources. The following elements are the directories, which contains<br />

the resources and services description from each one of the domains, these<br />

directories are not technology dependent, therefore this will be connected with<br />

any other platform through a driver. The considered platforms and the considered<br />

drivers are for the platforms such as the EPC Information System for<br />

RFID tags, and the handle system from CNIR for Digital Objects Identifiers<br />

(DOI). Finally, it has been also proposed a Smart Object Discovery Protocol<br />

based on current IPv6-based discovery protocols in order to enable the<br />

interaction between IPv6-enabled devices and the directory from its domain.

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