---
lang: en
title: 'API docs: repository.propertydefinition'
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.propertydefinition.html
---

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

## PropertyDefinition interface

Property definition for a model

**Signature:**

```typescript
export interface PropertyDefinition 
```

## Properties

|  Property | Modifiers | Type | Description |
|  --- | --- | --- | --- |
|  [hidden?](./repository.propertydefinition.hidden.md) |  | boolean | _(Optional)_ Used to hide this property from the response body, adding this property to the hiddenProperties array |
|  [id?](./repository.propertydefinition.id.md) |  | boolean \| number | _(Optional)_ |
|  [itemType?](./repository.propertydefinition.itemtype.md) |  | [PropertyType](./repository.propertytype.md) | _(Optional)_ |
|  [json?](./repository.propertydefinition.json.md) |  | [PropertyForm](./repository.propertyform.md) | _(Optional)_ |
|  [jsonSchema?](./repository.propertydefinition.jsonschema.md) |  | [JsonSchemaWithExtensions](./repository.jsonschemawithextensions.md) | _(Optional)_ |
|  [store?](./repository.propertydefinition.store.md) |  | [PropertyForm](./repository.propertyform.md) | _(Optional)_ |
|  [type](./repository.propertydefinition.type.md) |  | [PropertyType](./repository.propertytype.md) |  |