Cell Ontology The Extensible Observation Ontology Source
http://purl.obolibrary.org/obo/GO_0003824 http://ecoinformatics.org/oboe/oboe.1.2/oboe-characteristics.owl#CatalyticActivity LOOM
http://purl.obolibrary.org/obo/PATO_0000165 http://ecoinformatics.org/oboe/oboe.1.2/oboe-characteristics.owl#Time LOOM