Validation rules

cvc-complex-type.2.4.b — EN 16931 rule

An element's content is incomplete — a required child element is missing (e.g. an Invoice without any cac:InvoiceLine, or a line without cac:Item).

Rule
cvc-complex-type.2.4.b — official EN 16931 / XRechnung rule
Severity
error
Detected by
tier 2 — XML schema (XSD)
Reachability
Only reachable when validating your own XML — normbill-generated documents cannot trigger it

normbill's serializer emits schema-valid XML by construction; this can only fire for XML submitted to /v1/invoices/validate.

How to fix it

Add the missing child element the validator lists; it must appear at the position the UBL 2.1 sequence prescribes.

cvc-complex-type.2.4.b auf Deutsch — was bedeutet der Fehler?

Der KoSIT-Validator lehnt das Dokument bereits bei der XML-Schema-Prüfung (XSD) ab: Der Inhalt eines Elements ist unvollständig — ein Pflicht-Kindelement fehlt (z. B. eine Invoice ohne cac:InvoiceLine oder eine Position ohne cac:Item).

So beheben Sie den Fehler

Ergänzen Sie das in der Meldung genannte Kindelement an der Position, die die UBL-2.1-Sequenz vorschreibt.

Official sources

Every 422 from the API lists the rule id, the path in your request JSON, a plain-language message and a suggested fix — see the docs overview for the report format.

Or try it live: drop any XRechnung XML on the free validator — same KoSIT-backed report, no account.

Spotted something?

Bug, missing feature, wrong validation result — tell us. The page you're on is attached automatically; email optional.