The European Telecommunications Standards Institute's (ETSI) Smart Machine-to-Machine Communications (SmartM2M) technical committee extended its Internet of things (IoT) ontology to four new sectors: automotive, eHealth, wearables, and water domains. The smart applications reference ontology (SAREF) aims to facilitate interoperability between solutions from different providers and within various IoT sectors. These sectors join the six extensions already released for energy, environment, building, smart cities, industry and manufacturing, and smart agriculture and food chain.