This Recommendation specifies the semantics based requirements and framework of the Internet of things (IoT).

Taking into consideration the IoT reference model [ITU-T Y.4000] and building on the common requirements of IoT [ITU-T Y.4100], semantics based requirements are specified, including those related to the four layers (application, service support and application support (SSAS), network, and device layer) and the management and security capabilities of the IoT reference model, as well as semantics based requirements across layers.

Based on the identified IoT semantics based requirements and existing semantic technologies, the semantics based capability framework of the IoT is specified.

The scope of this Recommendation includes:

– introduction to semantic technologies for the IoT;

– semantics based use cases for IoT actors;

– semantics based requirements of the IoT;

– semantics based capability framework of the IoT.

Appendix I provides IoT applications scenarios highlighting the value of semantic technologies in the IoT.