---
title: NSMigrationStage
framework: coredata
role: symbol
role_heading: Class
path: coredata/nsmigrationstage
---

# NSMigrationStage

An abstract base class for describing an individual stage of a migration.

## Declaration

```swift
class NSMigrationStage
```

## Overview

Overview important: Don’t create instances of NSMigrationStage. Instead, use a concrete subclass, such as NSLightweightMigrationStage or NSCustomMigrationStage.

## Topics

### Describing the purpose

- [label](coredata/nsmigrationstage/label.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Inherited By

- [NSCustomMigrationStage](coredata/nscustommigrationstage.md)
- [NSLightweightMigrationStage](coredata/nslightweightmigrationstage.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Migration stages

- [NSLightweightMigrationStage](coredata/nslightweightmigrationstage.md)
- [NSCustomMigrationStage](coredata/nscustommigrationstage.md)