---
lang: en
title: 'API docs: repository.propertytype'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.repository.propertytype.html
---

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[Home](./index.md) &gt; [@loopback/repository](./repository.md) &gt; [PropertyType](./repository.propertytype.md)

## PropertyType type

This module defines the key classes representing building blocks for Domain Driven Design. See https://en.wikipedia.org/wiki/Domain-driven\_design\#Building\_blocks

<b>Signature:</b>

```typescript
export declare type PropertyType = string | Function | object | Type<any> | TypeResolver<Model>;
```

