---
title: "ValidationLevel – API-Referenz · Quittio"
description: "Validation levels."
canonical_url: "https://quittio.dev/docs/api/Quittio/Core/Validation/ValidationLevel"
locale: de
meta:
  "og:description": "Validation levels."
  "og:image": "https://quittio.dev/og/quittio-de.jpg"
  "og:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
  "og:image:height": "630"
  "og:image:type": image/jpeg
  "og:image:width": "1200"
  "og:title": "ValidationLevel – API-Referenz · Quittio"
  "twitter:image": "https://quittio.dev/og/quittio-de.jpg"
  "twitter:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
---

> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Core](https://quittio.dev/docs/api/Quittio/Core) \\ [Validation](https://quittio.dev/docs/api/Quittio/Core/Validation)

# ValidationLevel

string-backed enum in quittio/core

`Quittio\Core\Validation\ValidationLevel` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Validation/ValidationLevel.php#L10)

Validation levels.

## Cases \#

| Case | Value | Description |
| --- | --- | --- |
| `L1` | `'L1'` | Structure and data types of the DTOs. |
| `L2` | `'L2'` | Mandatory and allowed fields of the profile. |
| `L3` | `'L3'` | Business rules (EN 16931, country packs, networks). |
| `L4` | `'L4'` | XML against XSD. |
| `L5` | `'L5'` | XML against Schematron (KoSIT, Peppol). |
| `L6` | `'L6'` | PDF/A conformance (veraPDF). |
| `L7` | `'L7'` | Plausibility (IBAN, VAT identifiers, Leitweg-ID, dates). |

```json
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```