---
title: RelationshipCollection
framework: swiftdata
role: symbol
role_heading: Protocol
path: swiftdata/relationshipcollection
---

# RelationshipCollection

An interface for describing a collection of related models.

## Declaration

```swift
protocol RelationshipCollection
```

## Topics

### Associated Types

- [PersistentElement](swiftdata/relationshipcollection/persistentelement.md)

## See Also

### Properties

- [SchemaProperty](swiftdata/schemaproperty.md)