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---
lang: en
title: 'API docs: repository.relationmetadata'
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.relationmetadata.html
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[Home](./index.md) > [@loopback/repository](./repository.md) > [RelationMetadata](./repository.relationmetadata.md)
## RelationMetadata type
A union type describing all possible Relation metadata objects.
**Signature:**
```typescript
export type RelationMetadata = HasManyDefinition | BelongsToDefinition | HasOneDefinition | ReferencesManyDefinition | RelationDefinitionBase;
```
**References:** [HasManyDefinition](./repository.hasmanydefinition.md)<!-- -->, [BelongsToDefinition](./repository.belongstodefinition.md)<!-- -->, [HasOneDefinition](./repository.hasonedefinition.md)<!-- -->, [ReferencesManyDefinition](./repository.referencesmanydefinition.md)<!-- -->, [RelationDefinitionBase](./repository.relationdefinitionbase.md)