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2. UBL Invoice
3. ubl:Invoice
4. cac:BillingReference
5. cac:InvoiceDocumentReference
6. cbc:IssueDate

The date when the Preceding Invoice was issued.Shall be provided in case the Preceding Invoice identifier is not unique. Format = "YYYY-MM-DD".

Cardinality

0..1

Namespace

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

Data type

Date

Example value

2017-09-15

Business terms

BT-26

Rules

Identifier/Error message	Flag
PEPPOL-EN16931-F001 A date MUST be formatted YYYY-MM-DD.	fatal