ErrorEN 16931Input required

UBL-SR-50

Item description shall occur maximum once

What does this rule mean?

Item description shall occur maximum once

A syntax rule binding the EN 16931 requirements to the concrete XML syntax (UBL or CII).

Official rule message (standard)

Item description shall occur maximum once

Where the rule applies

Syntax: UBL

Affected element (XPath):

  • cac:InvoiceLine | cac:CreditNoteLine

Technical test

The rule passes when this Schematron expression holds true:

count(cac:Item/cbc:Description) <= 1

How to fix it

A missing or incorrect business entry only you can supply. Add or correct it, then re-check.

Adjust the named element/attribute to the syntax requirement.

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.

100% local — no upload, no account.

Related rules

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