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

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[Home](./index.md) &gt; [@loopback/repository](./repository.md) &gt; [PropertyDefinition](./repository.propertydefinition.md) &gt; [id](./repository.propertydefinition.id.md)

## PropertyDefinition.id property

<b>Signature:</b>

```typescript
id?: boolean | number;
```