---
title: "IdentifierScheme – API-Referenz · Quittio"
description: "Identifier scheme (ISO/IEC 6523 ICD), e.g. for BT-29, BT-46, BT-157. Further codes can be used as RawCode."
canonical_url: "https://quittio.dev/docs/api/Quittio/Core/Enums/IdentifierScheme"
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  "og:image": "https://quittio.dev/og/quittio-de.jpg"
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  "og:title": "IdentifierScheme – API-Referenz · Quittio"
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---

> 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) \\ [Enums](https://quittio.dev/docs/api/Quittio/Core/Enums)

# IdentifierScheme

string-backed enum in quittio/core · uses [`HasLabel`](https://quittio.dev/docs/api/Quittio/Core/Enums/Concerns/HasLabel)

`Quittio\Core\Enums\IdentifierScheme` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Enums/IdentifierScheme.php#L13)

Identifier scheme (ISO/IEC 6523 ICD), e.g. for BT-29, BT-46, BT-157. Further codes can be used as RawCode.

## Cases \#

| Case | Value | Description |
| --- | --- | --- |
| `Siren` | `'0002'` | |
| `SwedishOrganisationNumber` | `'0007'` | |
| `Siret` | `'0009'` | |
| `Duns` | `'0060'` | |
| `Gln` | `'0088'` | |
| `DutchKvk` | `'0106'` | |
| `Gtin` | `'0160'` | |
| `DanishCvr` | `'0184'` | |
| `DutchOin` | `'0190'` | |
| `NorwegianOrganisationNumber` | `'0192'` | |
| `LeitwegId` | `'0204'` | |
| `BelgianEnterpriseNumber` | `'0208'` | |

## Methods \#

| Method | Description |
| --- | --- |
| `::isValidCode()` | Whether a raw code value is valid according to the official code list. |
| `->label()` | |
| `::labelGroup()` | |

### `isValidCode()`#

```
public static function isValidCode(string $code): bool
```

static

Whether a raw code value is valid according to the official code list.

| Parameter | Type | Description |
| --- | --- | --- |
| `$code` | `string` | |

<dl><dt>Returns</dt>
<dd><code>bool</code></dd>
</dl>

### `label()`#

```
public function label(?string $locale = null): string
```

| Parameter | Type | Description |
| --- | --- | --- |
| `$locale` | `?string` = `null` | |

<dl><dt>Returns</dt>
<dd><code>string</code></dd>
</dl>

### `labelGroup()`#

```
public static function labelGroup(): string
```

static

<dl><dt>Returns</dt>
<dd><code>string</code></dd>
</dl>

```json
{"@context":"https://schema.org","@graph":[{"@id":"https://quittio.dev/#website","@type":"WebSite","description":"E-Rechnungen für PHP und Laravel: ZUGFeRD, XRechnung und Peppol erstellen, prüfen, lesen und archivieren.","inLanguage":"de-DE","name":"Quittio","url":"https://quittio.dev/","publisher":{"@id":"https://quittio.dev/#identity"},"workTranslation":{"@id":"https://quittio.dev/en#website"}},{"@id":"https://quittio.dev/docs/api/Quittio/Core/Enums/IdentifierScheme#webpage","@type":"WebPage","description":"Identifier scheme (ISO/IEC 6523 ICD), e.g. for BT-29, BT-46, BT-157. Further codes can be used as RawCode.","name":"IdentifierScheme – API-Referenz","url":"https://quittio.dev/docs/api/Quittio/Core/Enums/IdentifierScheme","isPartOf":{"@id":"https://quittio.dev/#website"},"potentialAction":[{"@type":"ReadAction","target":["https://quittio.dev/docs/api/Quittio/Core/Enums/IdentifierScheme"]}],"primaryImageOfPage":{"@id":"https://quittio.dev/#logo"}},{"@id":"https://quittio.dev/#identity","@type":"Organization","description":"Open-Source-Bibliothek für E-Rechnungen in PHP und Laravel (ZUGFeRD, XRechnung, Peppol) und Quittio Managed.","email":"kontakt@niklasforst.de","legalName":"Niklas Forst – Softwareentwicklung","name":"Quittio","url":"https://quittio.dev","founder":{"@type":"Person","name":"Niklas Forst","url":"https://quittio.dev/ueber"},"logo":{"@id":"https://quittio.dev/#logo"},"sameAs":["https://github.com/Quittio/quittio","https://packagist.org/packages/quittio/quittio"]},{"@id":"https://quittio.dev/#logo","@type":"ImageObject","caption":"Quittio","contentUrl":"https://quittio.dev/logo.png","inLanguage":"de-DE","url":"https://quittio.dev/logo.png"}]}
```