FX-SCH-A-000050
Each VAT breakdown (BG-23) shall have a VAT category rate (BT-119), except if the Invoice is not subject to VAT.
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.
Message
[BR-48] Each VAT breakdown (BG-23) shall have a VAT category rate (BT-119), except if the Invoice is not subject to VAT.
Context
//ram:ApplicableHeaderTradeSettlement/ram:ApplicableTradeTax
Test
(ram:RateApplicablePercent) or (ram:CategoryCode = 'O')
Checked with Factur-X / ZUGFeRD BASIC