CHEMROF	Radiology Lexicon	Source
http://www.daml.org/2003/01/periodictable/PeriodicTable#Metallic	http://www.radlex.org/RID/RID39131	LOOM
https://w3id.org/chemrof/Lipid	http://www.radlex.org/RID/RID5889	LOOM
https://w3id.org/chemrof/ChemicalElement	http://www.radlex.org/RID/RID11756	LOOM
https://w3id.org/chemrof/HardOrSoftEnum#hard	http://www.radlex.org/RID/RID49688	LOOM
https://w3id.org/chemrof/Protein	http://www.radlex.org/RID/RID1554	LOOM
http://purl.org/gc/Single	http://www.radlex.org/RID/RID5762	LOOM
https://w3id.org/chemrof/Location	http://www.radlex.org/RID/RID39038	LOOM
http://purl.org/gc/HydrogenBond	http://www.radlex.org/RID/RID11762	LOOM
https://w3id.org/chemrof/HardOrSoftEnum#soft	http://www.radlex.org/RID/RID49687	LOOM