Validation rules

cvc-pattern-valid

A value does not match the regular-expression pattern its datatype enforces (the validator message shows the pattern).

Rule
cvc-pattern-validofficial 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

Reformat the value to match the required pattern.

cvc-pattern-valid auf Deutsch — was bedeutet der Fehler?

Der KoSIT-Validator lehnt das Dokument bereits bei der XML-Schema-Prüfung (XSD) ab: Ein Wert entspricht nicht dem regulären Ausdruck, den sein Datentyp vorschreibt (die Meldung zeigt das Muster).

So beheben Sie den Fehler

Formatieren Sie den Wert passend zum geforderten Muster um.

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.