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2. UBL Invoice
3. ubl:Invoice
4. cac:OrderReference
5. cbc:ID

An identifier of a referenced purchase order, issued by the Buyer. An invoice must have buyer reference (BT-10) or purchase order reference. In cases where sales order reference is provided, but there's no purchase order reference, then use value "NA" as this element is mandatory in UBL.

Cardinality

1..1

Namespace

cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2

Data type

Document Reference

Example value

98776

Business terms

BT-13

Rules

Identifier/Error message	Flag
PEPPOL-EN16931-R003 A buyer reference or purchase order reference MUST be provided.	fatal