A set of codes that defines how a set of values are summarized in an aggregated computation, for use with sets of values do describe which aggregated statistic functions are to be applied (e.g., average, mode, min, max, standard deviation, variance).
Legenda: Type L=leaf, S=specializable, A=abstract, D=deprecated. NullFlavor OTH (other) suggests text in originalText. HL7 V3: NullFlavors to appear in @nullFlavor attribute instead of @code.