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---
lang: en
title: 'API docs: repository.repositorymetadata._constructor_'
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.repositorymetadata._constructor_.html
---
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[Home](./index.md) > [@loopback/repository](./repository.md) > [RepositoryMetadata](./repository.repositorymetadata.md) > [(constructor)](./repository.repositorymetadata._constructor_.md)
## RepositoryMetadata.(constructor)
Constructor for RepositoryMetadata
<b>Signature:</b>
```typescript
constructor(modelOrRepo: string | typeof Entity, dataSource?: string | juggler.DataSource | DataSource);
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| modelOrRepo | string \| typeof [Entity](./repository.entity.md) | Name or class of the model. If the value is a string and <code>dataSource</code> is not present, it will treated as the name of a predefined repository |
| dataSource | string \| juggler.DataSource \| [DataSource](./repository.datasource.md) | Name or instance of the data source<!-- -->For example:<!-- -->- new RepositoryMetadata(repoName); - new RepositoryMetadata(modelName, dataSourceName); - new RepositoryMetadata(modelClass, dataSourceInstance); - new RepositoryMetadata(modelName, dataSourceInstance); - new RepositoryMetadata(modelClass, dataSourceName); |