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lang: en
title: 'API docs: repository.relationdefinitionmap'
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.relationdefinitionmap.html
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[Home](./index.md) > [@loopback/repository](./repository.md) > [RelationDefinitionMap](./repository.relationdefinitionmap.md)
## RelationDefinitionMap type
A key-value map describing model relations. A relation name is used as the key, a relation definition is the value.
<b>Signature:</b>
```typescript
export declare type RelationDefinitionMap = {
[relationName: string]: RelationMetadata;
};
```
<b>References:</b> [RelationMetadata](./repository.relationmetadata.md)