Message

[BR-O-09]-The VAT category tax amount (BT-117) in a VAT breakdown (BG-23) where the VAT category code (BT-118) is "Not subject to VAT" shall be 0 (zero).

Context
/*/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory[normalize-space(cbc:ID) = 'O'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']
Test
xs:decimal(../cbc:TaxAmount) = 0
Usage
/ ubl:Invoice / cac:TaxTotal / cac:TaxSubtotal / cbc:TaxAmount