---
lang: en
title: 'API docs: repository.valueobject'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/repository
permalink: /doc/en/lb4/apidocs.repository.valueobject.html
---

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[Home](./index.md) &gt; [@loopback/repository](./repository.md) &gt; [ValueObject](./repository.valueobject.md)

## ValueObject class

Base class for value objects - An object that contains attributes but has no conceptual identity. They should be treated as immutable.

**Signature:**

```typescript
export declare abstract class ValueObject extends Model implements Persistable 
```
**Extends:** [Model](./repository.model.md)

**Implements:** [Persistable](./repository.persistable.md)