<xsd:group name="CommodityCalculationPeriods.model">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">The different options for specifying the Calculation Periods.</xsd:documentation>
    </xsd:annotation>
    <xsd:choice>
        <xsd:element name="calculationPeriods" type="AdjustableDates">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">The Calculation Periods for this leg of the swap. This type is only intended to be used if the Calculation Periods differ on each leg. If Calculation Periods mirror another leg, then the calculationPeriodsReference element should be used to point to the Calculation Periods on that leg - or the calculationPeriodsScheduleReference can be used to point to the Calculation Periods Schedule for that leg.</xsd:documentation>
            </xsd:annotation>
        </xsd:element>
        <xsd:element name="calculationPeriodsSchedule" type="CommodityCalculationPeriodsSchedule">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">The Calculation Periods for this leg of the swap. This type is only intended to be used if the Calculation Periods differ on each leg. If Calculation Periods mirror another leg, then the calculationPeriodsReference element should be used to point to the Calculation Periods on the other leg - or the calculationPeriodsScheduleReference can be used to point to the Calculation Periods Schedule for that leg.</xsd:documentation>
            </xsd:annotation>
        </xsd:element>
        <xsd:group ref="CommodityCalculationPeriodsPointer.model">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">Enables users to reference a Calculation Periods schedule in the form of a series of actual dates in a calculationPeriods container or in the form of a parameterised schedule in a calculationPeriodsSchedule container.</xsd:documentation>
            </xsd:annotation>
        </xsd:group>
    </xsd:choice>
</xsd:group>