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2. UBL Invoice
3. ubl:Invoice
4. cac:InvoiceLine
5. cac:InvoicePeriod
6. cbc:StartDate

The date when the Invoice period for this Invoice line starts. Format ="YYYY-MM-DD"

Cardinality

0..1

Namespace

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

Data type

Date

Example value

2017-10-05

Business terms

BT-134

Rules

Identifier/Error message	Flag
BR-CO-20 If Invoice line period (BG-26) is used, the Invoice line period start date (BT-134) or the Invoice line period end date (BT-135) shall be filled, or both.	fatal
PEPPOL-EN16931-R110 Start date of line period MUST be within invoice period.	fatal
PEPPOL-EN16931-F001 A date MUST be formatted YYYY-MM-DD.	fatal