Use the ItemClassificationCode sub-element of the Item element to model this information.

If you like, you can use the values from the European Common Procurement Vocabulary (CPV) here.

Elements

Element	Description
`Invoice/InvoiceLine/Item/CommodityClassification/ItemClassificationCode`	Specify the classification code.
`Invoice/InvoiceLine/Item/CommodityClassification/ItemClassificationCode [@listID]`	Use `STI`.

Restrictions

You must use STI as the value for the @listID attribute. This is from the UNCL 7143 list.

Example

<ubl:Invoice>
    <!-- Code omitted for clarity -->
    <cac:InvoiceLine>
        <!-- Code omitted for clarity -->
        <cac:Item>
            <cac:CommodityClassification>
                <cbc:ItemClassificationCode listID="STI">09343000-5</cbc:ItemClassificationCode>
            </cac:CommodityClassification>
        </cac:Item>
        <!-- Code omitted for clarity -->
    </cac:InvoiceLine>
     <!-- Code omitted for clarity -->
</ubl:Invoice>