This is the ValueSet that contains all the codes in Ingredient Role (http://hl7.org/fhir/uv/emedicinal-product-info/ValueSet/ingredientRole) and Ingredient Role (http://hl7.org/fhir/uv/emedicinal-product-info/ValueSet/ingredientRole). E.g. what you have to deal with if you get resources containing codes in either of them