Elements

Name (Technical Name)	Cardinality	Description
Additional Property (`/Invoice/UBLExtensions/UBLExtension/ ExtensionContent/InvoiceExtension/AdditionalProperty`)	0..n	A group of key-value pairs that provides additional invoice information.
Additional Property Name (`/Invoice/UBLExtensions/UBLExtension/ ExtensionContent/InvoiceExtension/AdditionalProperty/Name`)	1..1	The name of the additional property.
Additional Property Value (`/Invoice/UBLExtensions/UBLExtension/ ExtensionContent/InvoiceExtension/AdditionalProperty/Value`)	1..1	The value for the additional property.

Country Specific configuration

Poland B2B: Additional Property

Example

<ubl:Invoice>
    <cec:UBLExtensions>
        <cec:UBLExtension>
            <cec:ExtensionContent>
                <vrbl:InvoiceExtension>
                    <!-- Key/value pair on document level -->
                    <vrbl:AdditionalProperty>
                        <cbc:Name>TermsAndConditions</cbc:Name>
                        <cbc:Value>https://our-terms-and-conditions.com</cbc:Value>
                    </vrbl:AdditionalProperty>
                    <vrbl:AdditionalProperty>
                        <cbc:Name>OtherKey</cbc:Name>
                        <cbc:Value>OtherValue</cbc:Value>
                    </vrbl:AdditionalProperty>
                    <!-- code omitted for clarity -->
                </vrbl:InvoiceExtension>
            </cec:ExtensionContent>
        </cec:UBLExtension>
    </cec:UBLExtensions>
    <!-- code omitted for clarity -->
</ubl:Invoice>