PEPPOL-EN16931-R110
Start date of line period MUST be within invoice period.
What does this rule mean?
A line period start date (BT-134) lies outside the invoicing period (BG-14).
Line periods are slices of the invoicing period — if one starts earlier, one of the two is wrong.
Official rule message (standard)
Start date of line period MUST be within invoice period.
Where the rule applies
Syntax: CII · UBL
The same rule, expressed twice: UBL and CII name the same fields with different paths. Running a CII file against the UBL rules is why you get errors that mean nothing.
UBL
ubl-invoice:Invoice[cac:InvoicePeriod/cbc:StartDate]/cac:InvoiceLine/cac:InvoicePeriod/cbc:StartDate | ubl-creditnote:CreditNote[cac:InvoicePeriod/cbc:StartDate]/cac:CreditNoteLine/cac:InvoicePeriod/cbc:StartDate
CII
rsm:SupplyChainTradeTransaction[ram:ApplicableHeaderTradeSettlement/ram:BillingSpecifiedPeriod/ram:StartDateTime]/ram:IncludedSupplyChainTradeLineItem/ram:SpecifiedLineTradeSettlement/ram:BillingSpecifiedPeriod/ram:StartDateTime
Technical test
The rule passes when this Schematron expression holds true:
udt:DateTimeString >= ../../../../ram:ApplicableHeaderTradeSettlement/ram:BillingSpecifiedPeriod/ram:StartDateTime/udt:DateTimeStringHow to fix it
A missing or incorrect business entry only you can supply. Add or correct it, then re-check.
Correct the line period, or widen the invoicing period.
Correct the affected entry in your XML, then re-check the invoice. Validation runs locally in your browser — your file never leaves your machine.
Check an e-invoice here
Drop an XML or ZUGFeRD PDF file here. Validation runs locally in your browser against EN 16931 — your file never leaves your machine.