Material Element	SNOMED CT	Source
http://sweet.jpl.nasa.gov/2.3/matrElement.owl#Metal	http://purl.bioontology.org/ontology/SNOMEDCT/425620007	LOOM
http://sweet.jpl.nasa.gov/2.3/matrElement.owl#NobleGas	http://purl.bioontology.org/ontology/SNOMEDCT/765040008	LOOM
http://sweet.jpl.nasa.gov/2.3/matrElement.owl#ChemicalElement	http://purl.bioontology.org/ontology/SNOMEDCT/57795002	LOOM
http://sweet.jpl.nasa.gov/2.3/matrElement.owl#HeavyMetal	http://purl.bioontology.org/ontology/SNOMEDCT/22907001	LOOM
http://sweet.jpl.nasa.gov/2.3/matrElement.owl#Halogen	http://purl.bioontology.org/ontology/SNOMEDCT/28227002	LOOM
http://sweet.jpl.nasa.gov/2.3/matr.owl#Chemical	http://purl.bioontology.org/ontology/SNOMEDCT/441900009	LOOM
http://sweet.jpl.nasa.gov/2.3/matr.owl#Chemical	http://purl.bioontology.org/ontology/STY/T103	LOOM