XEML Environment Ontology	Disease Drivers Ontology	Source
http://purl.obolibrary.org/obo/NCIT_C391	http://purl.obolibrary.org/obo/XEO_00080	LOOM
http://purl.obolibrary.org/obo/NCIT_C598	http://purl.obolibrary.org/obo/XEO_00081	LOOM