Message

An allowance or charge amount MUST NOT be negative.

Context
/ubl:CreditNote/cac:AllowanceCharge
Test
number(cbc:Amount)>=0
Usage
/ ubl:CreditNote / cac:AllowanceCharge / cbc:Amount
/ ubl:CreditNote / cac:CreditNoteLine / cac:AllowanceCharge / cbc:Amount
/ ubl:CreditNote / cac:CreditNoteLine / cac:Price / cac:AllowanceCharge / cbc:Amount