Message

In a Document level allowance (BG-20) where the Document level allowance VAT category code (BT-95) is "Standard rated" the Document level allowance VAT rate (BT-96) shall be greater than zero.

Context
cac:AllowanceCharge[cbc:ChargeIndicator=false()]/cac:TaxCategory[normalize-space(cbc:ID)='S'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']
Test
(cbc:Percent) > 0
Usage
/ ubl:Invoice / cac:AllowanceCharge / cac:TaxCategory / cbc:Percent
/ ubl:CreditNote / cac:AllowanceCharge / cac:TaxCategory / cbc:Percent