Use the DataType element to specify the data type and any required details.

Italian Specifications

Element	Italian Specification	Status
`DataType`	`2.2.1.16.1 (TipoDato)`	Conditionally required for `N3.5`.
`Description`	`2.2.1.16.2 (RiferimentoTesto)`	Conditionally required for `N3.5`.
`ReferenceNumber`	`2.2.1.16.3 (RiferimentoNumero)`	Conditionally required for `N3.5`. Must be a numeric value.
`ReferenceDate`	`2.2.1.16.4 (RiferimentoData)`	Conditionally required for `N3.5`.

Elements

Element	Description
`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType`	Specify the Data Type.
`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType/Description`	Specify a free text description.
`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType/ReferenceNumber`	Specify a reference number. Must be a numeric value.
`Invoice/InvoiceLine/UBLExtensions/UBLExtension/ExtensionContent/ InvoiceLineExtension/AdditionalData/DataType/ReferenceDate`	Specify a date.

Restrictions

If you specify N3.5(dichiarazioni d'intento) as the DataType, you must add these elements are required.

Example

This example shows:

<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>

This example shows the N3.5(dichiarazioni d'intento) data type and the extra information that is required, a description and reference:

EXAMPLE: N3.5 (dichiarazione d'intento)
<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>Number of declaration of intent</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>