<xsd:group name="CommodityDeliveryPeriodsPointer.model">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">Model group to enable users to reference a Delivery Periods schedule in the form of a series of actual dates in a deliveryPeriods container or in the form of a parameterised schedule in a deliveryPeriodsSchedule container.</xsd:documentation>
    </xsd:annotation>
    <xsd:choice>
        <xsd:element name="deliveryPeriodsReference" type="CalculationPeriodsReference">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">A pointer style reference to the Delivery Periods defined elsewhere.</xsd:documentation>
            </xsd:annotation>
        </xsd:element>
        <xsd:element name="deliveryPeriodsScheduleReference" type="CalculationPeriodsScheduleReference">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">A pointer style reference to the Calculation Periods Schedule defined elsewhere.</xsd:documentation>
            </xsd:annotation>
        </xsd:element>
    </xsd:choice>
</xsd:group>