Table 3.

The base URI of a data specification is shortened with a prefix

Data standard	Prefix	Base URI
Semantic Sensor Network	ssn	http://www.w3.org/ns/ssn/
Sensor, Observation, Sample, and Actuator ontology	sosa	http://www.w3.org/ns/sosa/
City of Things	cot	https://w3id.org/cot#
OSLO Infrastructure	oslo-infra	https://wegenenverkeer.data.vlaanderen.be/ns/onderdeel#
NGSI-LD core metadata model	ngsi-ld	https://uri.etsi.org/ngsi-ld/
Traffic Flow Observed	fiware	https://uri.fiware.org/ns/data-models#
ISA Location Core Vocabulary	locn	http://www.w3.org/ns/locn#
OGC GeoSPARQL	geosparql	http://www.opengis.net/ont/geosparql#
OWL-Time	time	http://www.w3.org/2006/time#