Use the AdditionalDocumentReference element to specify the code for the referenced stage and an ID to identify it.

Italian Specification

Detail	Value
Italian Specification	`2.1.7.1 (DatiSAL/RiferimentoFase)`

Element

Element	Description
`Invoice/AdditionalDocumentReference/ID`	Specify the code that represents the state.
`Invoice/AdditionalDocumentReference/ID[@schemeID = 'VRBL:IT:AOR']`	Use `VRBL:IT:AOR` in the `@schemeID` attribute.

Restrictions

Use VRBL:IT:AOR for the @schemeID values.
This element is only used for B2G. It corresponds to the AgID's suggested implementation.

Example

The following example specifies 200 for the referenced stage:

<ubl:Invoice>
    <cac:AdditionalDocumentReference>
        <!-- Code omitted for clarity -->
        <cbc:ID schemeID="VRBL:IT:AOR">200</cbc:ID>
        <!-- Code omitted for clarity -->
    </cac:AdditionalDocumentReference>
</ubl:Invoice>