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BR-DEX-09

Amount due for payment (BT-115) = Invoice total amount with VAT (BT-112) - Paid amount (BT-113) + Rounding amount (BT-114) + Σ Third party payment amount (BT-DEX-002).

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

XRechnung 3.0 rules (UBL) 2.6.0
Context
cac:LegalMonetaryTotal[$isExtension]
Test
(round((xs:decimal(cbc:PayableAmount) - $payableroundingamount) * 10 * 10) div 100) = (round((xs:decimal(cbc:TaxInclusiveAmount) - $prepaidamount + $thirdpartyprepaidamount) * 10 * 10) div 100)

Checked with XRechnung 3.0 Invoice (UBL), XRechnung 3.0 Credit Note (UBL)