Use “true” when informing about Charges and “false” when informing about Allowances
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2false| Identifier/Error message | Flag | 
|---|---|
| PEPPOL-EN16931-R043 Allowance/charge ChargeIndicator value MUST equal 'true' or 'false'  | 
            fatal |