Semantic model for the application domain - second release

D4.2.b This deliverable will provide the specification of a semantic model which provides a formal definition of vocabulary terms to annotate the descriptions of offerings of services and platforms exposed through the marketplace. The deliverable is developed in 3 iterative cycles, starting with D4.2.a that is due in M12. The second version D4.2.b is due at M21 and the third version D4.2.c is due at M30. Each new version will extend the previous version to take into account the progress on related deliverables (e.g., use cases, requirements, BIG IoT API, marketplace, and high level architecture). D4.2.b contributes to MS3.