RxNORM	Plant Diversity Ontology	Source
http://purl.obolibrary.org/obo/envo#Air	http://purl.bioontology.org/ontology/RXNORM/411	LOOM
http://purl.obolibrary.org/obo/envo#Water	http://purl.bioontology.org/ontology/RXNORM/11295	LOOM