odoo16/addons/account_edi_ubl_cii/data/ubl_21_templates.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <template id="ubl_21_InvoiceLineType" inherit_id="account_edi_ubl_cii.ubl_20_InvoiceLineType" primary="True">
        <xpath expr="//*[local-name()='Item']" position="before">
            <t t-if="invoice.move_type == 'out_refund'">
                <!-- AllowanceCharge and TaxTotal are swapped in the CreditLine
                w.r.t InvoiceLine. see: http://www.datypic.com/sc/ubl21/e-cac_InvoiceLine.html
                vs http://www.datypic.com/sc/ubl21/e-cac_CreditNoteLine.html-->
                <t t-foreach="vals.get('allowance_charge_vals', [])" t-as="foreach_vals">
                    <cac:AllowanceCharge
                        xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
                        xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
                        xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
                        <t t-call="{{AllowanceChargeType_template}}">
                            <t t-set="vals" t-value="foreach_vals"/>
                        </t>
                    </cac:AllowanceCharge>
                </t>
            </t>
        </xpath>
    </template>

    <template id="ubl_21_InvoiceType" inherit_id="account_edi_ubl_cii.ubl_20_InvoiceType" primary="True">
        <xpath expr="//*[local-name()='IssueDate']" position="after">
            <cbc:DueDate
                    xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
                    xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
                    xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
                    t-if="invoice.move_type == 'out_invoice'"
                    t-out="vals.get('due_date')"/>
            <cbc:CreditNoteTypeCode
                    xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
                    xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
                    xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
                    t-if="invoice.move_type == 'out_refund'"
                    t-att="vals.get('invoice_type_code_attrs', {})"
                    t-out="vals.get('credit_note_type_code')"
            />
        </xpath>
        <xpath expr="//*[local-name()='DocumentCurrencyCode']" position="after">
            <cbc:BuyerReference
                    xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
                    xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
                    xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
                    t-out="vals.get('buyer_reference')"/>
        </xpath>
        <xpath expr="//*[@id='delivery_foreach']" position="after">
            <t t-if="invoice.move_type == 'out_refund'">
                <t t-foreach="vals.get('payment_means_vals_list', [])" t-as="foreach_vals">
                    <cac:PaymentMeans
                        xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
                        xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
                        xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
                        <t t-call="{{PaymentMeansType_template}}">
                            <t t-set="vals" t-value="foreach_vals"/>
                        </t>
                    </cac:PaymentMeans>
                </t>
            </t>
        </xpath>
    </template>

</odoo>