Optional_Optional_Indicates an alternative material of the device
OptionalallergenicWhether the substance is a known or suspected allergen
OptionalalternateIndicates an alternative material of the device
OptionalextensionAdditional content defined by implementations
OptionalidUnique id for inter-element referencing
OptionalmodifierExtensions that cannot be ignored even if unrecognized
The substance
Whether the substance is a known or suspected allergen