Elements

Name (Path)	Description
Additional Data Group (`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData`)	Group of information about additional data.
Data Type (`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType`)	Specify the Data Type.
Description (`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType/Description`)	Specify a free text description.
Reference Date (`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType/ReferenceDate`)	Specify a date.
Reference Number (`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType/ReferenceNumber`)	Specify a reference number. Must be a numeric value.

Country-Specific configurations

Examples

<ubl:Invoice>
    <!-- Code omitted for clarity -->
    <cac:InvoiceLine>
        <cec:UBLExtensions>
            <cec:UBLExtension>
                <cec:ExtensionContent>
                    <vrbl:InvoiceLineExtension>
                        <vrbl:AdditionalData>
                            <vrbl:DataType>Supporting Document</vrbl:DataType>
                            <!-- Code omitted for clarity -->
                        </vrbl:AdditionalData>
                        <!-- Code omitted for clarity -->
                    </vrbl:InvoiceLineExtension>                            
                </cec:ExtensionContent>
            </cec:UBLExtension>
        <!-- Code omitted for clarity -->
    </cac:InvoiceLine>
    <!-- Code omitted for clarity -->
</ubl:Invoice>

N3.5 example

<ubl:Invoice>
    <!-- Code omitted for clarity -->
    <cac:InvoiceLine>
        <cec:UBLExtensions>
            <cec:UBLExtension>
                <cec:ExtensionContent>
                    <vrbl:InvoiceLineExtension>
                        <vrbl:AdditionalData>
                            <vrbl:DataType>INTENTO</vrbl:DataType>
                            <vrbl:Description>24039710200666654-000021</vrbl:Description>
                            <vrbl:ReferenceDate>2024-04-22</vrbl:ReferenceDate>
                        </vrbl:AdditionalData>
                    </vrbl:InvoiceLineExtension>
                </vrbl:InvoiceLineExtension>                            
            </cec:ExtensionContent>
        </cec:UBLExtension>
    </cac:InvoiceLine>
    <!-- Code omitted for clarity -->
</ubl:Invoice>