Message

An Invoice shall at least have one VAT breakdown group (BG-23).

Context
/ubl:Invoice | /cn:CreditNote
Test
exists(cac:TaxTotal/cac:TaxSubtotal)
Usage
/ ubl:Invoice / cac:TaxTotal / cac:TaxSubtotal
/ ubl:CreditNote / cac:TaxTotal / cac:TaxSubtotal