OptionaldetailOptionalextensionAdditional content defined by implementations
OptionalidUnique id for inter-element referencing
OptionalmodifierExtensions that cannot be ignored even if unrecognized
OptionaloutcomeResults of the activity
OptionaloutcomeAppointment, Encounter, Procedure, etc.
OptionalprogressComments about the activity status/progress
OptionalreferenceActivity details defined in specific resource
In-line definition of activity