Relations Ontology GEneral Multilingual Environmental Thesaurus Source
http://purl.obolibrary.org/obo/OGMS_0000031 http://www.eionet.europa.eu/gemet/concept/2232 LOOM
http://purl.obolibrary.org/obo/GO_0008150 http://www.eionet.europa.eu/gemet/concept/867 LOOM