Minimal Standard Terminology of Digestive Endoscopy	Material	Source
http://sweet.jpl.nasa.gov/2.3/matr.owl#Substance	http://purl.bioontology.org/ontology/STY/T167	LOOM
http://sweet.jpl.nasa.gov/2.3/matr.owl#Chemical	http://purl.bioontology.org/ontology/STY/T103	LOOM