Optional_Optional_Data type or Resource (reference to definition)
Optional_Profiles (StructureDefinition or IG) - one must apply
Optional_Profile (StructureDefinition or IG) on the Reference/canonical target - one must apply
Optional_either | independent | specific
Optionalaggregationcontained | referenced | bundled - how aggregated
Data type or Resource (reference to definition)
OptionalextensionAdditional content defined by implementations
OptionalidUnique id for inter-element referencing
OptionalprofileProfiles (StructureDefinition or IG) - one must apply
OptionaltargetProfile (StructureDefinition or IG) on the Reference/canonical target - one must apply
Optionalversioningeither | independent | specific
contained | referenced | bundled - how aggregated