The Extensible Observation Ontology Context-Aware System Ontology Source
http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#Unit http://www.ontology-of-units-of-measure.org/resource/om-2/Unit LOOM
http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#Observation http://www.w3id.org/def/caso#Observation LOOM
http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#Observation http://www.w3.org/ns/sosa/Observation LOOM