[jlmoli_67]

Buenas,

Yo lo tengo asi:

<cac:TaxTotal>
    <cbc:TaxAmount currencyID="EUR">-13.10</cbc:TaxAmount>
    <cac:TaxSubtotal>
      <cbc:TaxableAmount currencyID="EUR">-50.00</cbc:TaxableAmount>
      <cbc:TaxAmount currencyID="EUR">-10.50</cbc:TaxAmount>
      <cac:TaxCategory>
        <cbc:ID>S</cbc:ID>
        <cbc:Percent>21.0</cbc:Percent>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:TaxCategory>
    </cac:TaxSubtotal>
    <cac:TaxSubtotal>
      <cbc:TaxableAmount currencyID="EUR">-50.00</cbc:TaxableAmount>
      <cbc:TaxAmount currencyID="EUR">-2.60</cbc:TaxAmount>
      <cac:TaxCategory>
        <cbc:ID>N</cbc:ID>
        <cbc:Percent>5.2</cbc:Percent>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:TaxCategory>
    </cac:TaxSubtotal>
  </cac:TaxTotal>

<cac:InvoiceLine>
    <cbc:ID>1</cbc:ID>
    <cbc:InvoicedQuantity unitCode="EA">-1</cbc:InvoicedQuantity>
    <cbc:LineExtensionAmount currencyID="EUR">-50.00</cbc:LineExtensionAmount>
    <cac:Item>
      <cbc:Description>Rectificación de Producto 1</cbc:Description>
      <cbc:Name>Producto 1</cbc:Name>
      <cac:ClassifiedTaxCategory>
        <cbc:ID>S</cbc:ID>
        <cbc:Percent>21.0</cbc:Percent>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:ClassifiedTaxCategory>
      <cac:ClassifiedTaxCategory>
        <cbc:ID>N</cbc:ID>
        <cbc:Percent>5.2</cbc:Percent>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:ClassifiedTaxCategory>
      <cac:AdditionalItemProperty>
        <cbc:Name>urn:aeat:names:specification:schema:lin:REGI</cbc:Name>
        <cbc:Value>01</cbc:Value>
        <cbc:ValueQualifier>IVA</cbc:ValueQualifier>
      </cac:AdditionalItemProperty>
    </cac:Item>
    <cac:Price>
      <cbc:PriceAmount currencyID="EUR">50.00</cbc:PriceAmount>
    </cac:Price>
  </cac:InvoiceLine>

lo de los negativos es porque estoy con una rectificativa haciendo pruebas. En principio el validador contra el xsd publicado me da bien.