SAREF4CITY-1. The extension defines restrictions on saref:Device (saref-portal#31)
From saref-portal#31
Situation: The extension defines a restriction on saref:Device: that it is a subclass of geosp:Feature. In SAREF Core, add axiom: saref:Device rdfs:subClassOf geo:Feature .
Remove specializations.
Changes have to be performed in the OWL code, TS, diagrams, documentation, tests and examples