Voor een aantal elementen die we op willen nemen in de UBL factuur is geen ruimte binnen de standaard definitie. Om deze elementen op te kunnen nemen wordt gebruikt gemaakt van het element AdditionalItemProperty, Deze maakt het mogelijk een naam van een element op te geven en de waarde van het element. Onderstaande tabel geeft een overzicht van extra elementen die we onderkennen.

 <?xml version="1.0" encoding="Windows-1252"?><Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:qdt="urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2" xmlns:ccts="urn:oasis:names:specification:ubl:schema:xsd:CoreComponentParameters-2" xmlns:stat="urn:oasis:names:specification:ubl:schema:xsd:DocumentStatusCode-1.0" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:udt="urn:un:unece:uncefact:data:draft:UnqualifiedDataTypesSchemaModule:2">
  <cbc:UBLVersionID>2.0</cbc:UBLVersionID>
  <cbc:ID>12658531</cbc:ID>
  <cbc:CopyIndicator>false</cbc:CopyIndicator>
  <cbc:IssueDate>2017-06-09</cbc:IssueDate>
  <cbc:InvoiceTypeCode>D</cbc:InvoiceTypeCode>
  <cbc:DocumentCurrencyCode>EUR</cbc:DocumentCurrencyCode>
  <cbc:LineCountNumeric>1</cbc:LineCountNumeric>
  <cac:BillingReference>
    <cac:InvoiceDocumentReference>
      <cbc:ID>7116003_CBF_DV_201706_12658531.pdf</cbc:ID>
    </cac:InvoiceDocumentReference>
  </cac:BillingReference>
  <cac:AccountingSupplierParty>
    <cac:Party>
      <cac:PartyIdentification>
        <cbc:ID>30276460</cbc:ID>
      </cac:PartyIdentification>
      <cac:PartyName>
        <cbc:Name>CB Facturatie B.V.</cbc:Name>
      </cac:PartyName>
      <cac:PostalAddress>
        <cbc:Postbox>125</cbc:Postbox>
        <cbc:CityName>Culemborg</cbc:CityName>
        <cbc:PostalZone>4100 AC</cbc:PostalZone>
        <cac:Country>
          <cbc:IdentificationCode>NL</cbc:IdentificationCode>
          <cbc:Name>Nederland</cbc:Name>
        </cac:Country>
      </cac:PostalAddress>
      <cac:PartyTaxScheme>
        <cbc:CompanyID>NL821679648B01</cbc:CompanyID>
        <cac:TaxScheme>
          <cbc:Name>NL VAT</cbc:Name>
        </cac:TaxScheme>
      </cac:PartyTaxScheme>
    </cac:Party>
    <cac:AccountingContact>
      <cbc:Telephone>0345-475888</cbc:Telephone>
      <cbc:Telefax>0345-475898</cbc:Telefax>
    </cac:AccountingContact>
  </cac:AccountingSupplierParty>
  <cac:AccountingCustomerParty>
    <cbc:SupplierAssignedAccountID>7116003</cbc:SupplierAssignedAccountID>
    <cac:Party>
      <cac:PartyName>
        <cbc:Name> Boek- en kantoorvakhandel Messink &amp; Prinsen</cbc:Name>
      </cac:PartyName>
      <cac:PostalAddress>
        <cbc:StreetName>Landstraat 39</cbc:StreetName>
        <cbc:CityName>Aalten</cbc:CityName>
        <cbc:PostalZone>7121 CP</cbc:PostalZone>
        <cac:Country>
          <cbc:IdentificationCode>NL</cbc:IdentificationCode>
        </cac:Country>
      </cac:PostalAddress>
      <cac:PartyTaxScheme>
        <cbc:CompanyID>NL004691611B01</cbc:CompanyID>
        <cac:TaxScheme>
          <cbc:Name>NL VAT</cbc:Name>
        </cac:TaxScheme>
      </cac:PartyTaxScheme>
    </cac:Party>
  </cac:AccountingCustomerParty>
  <cac:Delivery>
    <cac:DeliveryAddress>
      <cbc:StreetName>Erasmusweg 10</cbc:StreetName>
      <cbc:CityName>CULEMBORG</cbc:CityName>
      <cbc:PostalZone>4104 AK</cbc:PostalZone>
      <cac:Country>
        <cbc:IdentificationCode>NL</cbc:IdentificationCode>
      </cac:Country>
    </cac:DeliveryAddress>
    <cac:DeliveryParty>
      <cac:PartyIdentification>
        <cbc:ID>7116003.00</cbc:ID>
      </cac:PartyIdentification>
      <cac:PartyName>
        <cbc:Name> Boek- en kantoorvakhandel Messink &amp; Prinsen</cbc:Name>
      </cac:PartyName>
    </cac:DeliveryParty>
  </cac:Delivery>
  <cac:PaymentMeans>
    <cbc:PaymentMeansCode>VD</cbc:PaymentMeansCode>
    <cbc:PaymentDueDate>2017-08-15</cbc:PaymentDueDate>
    <cbc:InstructionNote>Door u te voldoen</cbc:InstructionNote>
    <cac:PayeeFinancialAccount>
      <cbc:ID>NL76RABO0108242927</cbc:ID>
      <cac:FinancialInstitutionBranch>
        <cbc:ID>RABONL2U</cbc:ID>
        <cbc:Name>Rabobank</cbc:Name>
      </cac:FinancialInstitutionBranch>
    </cac:PayeeFinancialAccount>
  </cac:PaymentMeans>
  <cac:TaxTotal>
    <cbc:TaxAmount currencyID="EUR">0.82</cbc:TaxAmount>
    <cac:TaxSubtotal>
      <cbc:TaxableAmount currencyID="EUR">13.65</cbc:TaxableAmount>
      <cbc:TaxAmount currencyID="EUR">0.82</cbc:TaxAmount>
      <cbc:Percent>6</cbc:Percent>
      <cac:TaxCategory>
        <cac:TaxScheme>
          <cbc:Name>NL VAT</cbc:Name>
        </cac:TaxScheme>
      </cac:TaxCategory>
    </cac:TaxSubtotal>
  </cac:TaxTotal>
  <cac:LegalMonetaryTotal>
    <cbc:TaxExclusiveAmount currencyID="EUR">13.65</cbc:TaxExclusiveAmount>
    <cbc:PayableAmount currencyID="EUR">14.47</cbc:PayableAmount>
  </cac:LegalMonetaryTotal>
  <cac:InvoiceLine>
    <cbc:ID>98575394</cbc:ID>
    <cbc:InvoicedQuantity>1</cbc:InvoicedQuantity>
    <cbc:LineExtensionAmount currencyID="EUR">13.65</cbc:LineExtensionAmount>
    <cac:OrderLineReference>
      <cbc:LineID>102960531</cbc:LineID>
      <cac:OrderReference>
        <cbc:ID>v diepen</cbc:ID>
      </cac:OrderReference>
    </cac:OrderLineReference>
    <cac:Delivery>
      <cbc:ID>6530360628</cbc:ID>
    </cac:Delivery>
    <cac:AllowanceCharge>
      <cbc:ChargeIndicator>false</cbc:ChargeIndicator>
      <cbc:MultiplierFactorNumeric>0.42</cbc:MultiplierFactorNumeric>
      <cbc:Amount currencyID="EUR">9.89</cbc:Amount>
    </cac:AllowanceCharge>
    <cac:TaxTotal>
      <cbc:TaxAmount currencyID="EUR">0.82</cbc:TaxAmount>
      <cac:TaxSubtotal>
        <cbc:TaxableAmount currencyID="EUR">13.65</cbc:TaxableAmount>
        <cbc:TaxAmount currencyID="EUR">0.82</cbc:TaxAmount>
        <cbc:Percent>6</cbc:Percent>
        <cbc:PerUnitAmount currencyID="EUR">23.54</cbc:PerUnitAmount>
        <cac:TaxCategory>
          <cac:TaxScheme>
            <cbc:Name>NL VAT</cbc:Name>
          </cac:TaxScheme>
        </cac:TaxCategory>
      </cac:TaxSubtotal>
    </cac:TaxTotal>
    <cac:Item>
      <cbc:Description>WELINK*PLATTELANDERS 2</cbc:Description>
      <cac:StandardItemIdentification>
        <cbc:ID>9789491172403</cbc:ID>
      </cac:StandardItemIdentification>
      <cac:AdditionalItemProperty>
        <cbc:Name>Uitgever</cbc:Name>
        <cbc:Value>VELTMAN EDICOLA</cbc:Value>
      </cac:AdditionalItemProperty>
      <cac:AdditionalItemProperty>
        <cbc:Name>Opdrachttype</cbc:Name>
        <cbc:Value>Levering thuisbezorgservice boekhandel</cbc:Value>
      </cac:AdditionalItemProperty>
      <cac:AdditionalItemProperty>
        <cbc:Name>Voorwaarde</cbc:Name>
        <cbc:Value>DUD</cbc:Value>
      </cac:AdditionalItemProperty>
      <cac:AdditionalItemProperty>
        <cbc:Name>Boeksoort</cbc:Name>
        <cbc:Value>A</cbc:Value>
      </cac:AdditionalItemProperty>
    </cac:Item>
    <cac:Price>
      <cbc:PriceAmount currencyID="EUR">24.95</cbc:PriceAmount>
    </cac:Price>
  </cac:InvoiceLine>
</Invoice>

Vanaf 1 oktober 2022 is het bedrag op het voorblad van de factuur (Totaal netto excl btw) het totaal van alle niet afgeronde regelbedragen. Dit bedrag is de basis voor de berekening van de btw.