Message

An Invoice shall contain maximum one Payment Mandate (BG-19).

Context
/ubl:Invoice | /cn:CreditNote
Test
count(cac:PaymentMeans/cac:PaymentMandate) <= 1
Usage
/ ubl:Invoice / cac:PaymentMeans / cac:PaymentMandate
/ ubl:CreditNote / cac:PaymentMeans / cac:PaymentMandate