<xs:group name="ShippingWeights">
    <xs:sequence>
        <xs:element name="EstimatedWeight" type="Quantity" minOccurs="0">
            <xs:annotation>
                <xs:documentation source="http://www.openapplications.org/oagis">The estimated weight of an item or container.  An estimate is provided as a processing alternative when the actual weight of an item is not known or cannot be calculated exactly.</xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="LoadingWeight" type="Quantity" minOccurs="0">
            <xs:annotation>
                <xs:documentation source="http://www.openapplications.org/oagis">This is the net weight at loading time of the container in which the materials are being shipped.</xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="NetWeight" type="Quantity" minOccurs="0">
            <xs:annotation>
                <xs:documentation source="http://www.openapplications.org/oagis">This is the net weight of the goods or materials being shipped.</xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="TotalWeight" type="Quantity" minOccurs="0">
            <xs:annotation>
                <xs:documentation source="http://www.openapplications.org/oagis">Quantifies the weight, or heaviness, of an item, container or shipment.</xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="TotalVolume" type="Quantity" minOccurs="0">
            <xs:annotation>
                <xs:documentation source="http://www.openapplications.org/oagis">Quantifies the volume, or amount of space, that is occupied by an item, container or shipment.</xs:documentation>
            </xs:annotation>
        </xs:element>
    </xs:sequence>
</xs:group>