[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › SnakeCaseIdentifier

```ts
const SnakeCaseIdentifier: identifier("snake_case")(String);
```

Defined in: [packages/common/src/Type.ts:5762](https://github.com/evoluhq/evolu/blob/ecbac001e0c18bbc45b44715f49ecc3a768c5ec9/packages/common/src/Type.ts#L5762)

A validated snake_case identifier, such as `http2_port`.

See [identifier](https://evolu.dev/docs/api-reference/common/Type/functions/identifier) for the grammar and the conversion functions.