Semantic Sensor Network / SOSA
Joint W3C/OGC ontology for sensors, observations, sampling, and actuation. Core of IoT semantic standards.
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Where this one tends to earn its keep.
IoT sensor data semantic integration
Environmental monitoring networks
Smart building sensor management
Earth observation data harmonization
W3C-Document-LicenseDerivative works may be distributed only as software, supporting materials or documentation — not as a standalone or competing technical specification.
Derived from SSN/SOSA, Copyright (c) 2017 OGC & World Wide Web Consortium. https://www.w3.org/Consortium/Legal/copyright-documents. Source: https://www.w3.org/TR/vocab-ssn/
Verified against the licence text on 2026-08-07.
Others worth a look in Web Standards.