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# NSManagedObjectModelReference

An object that describes a specific version of an object model.

```
class NSManagedObjectModelReference
```

## Topics

### Creating a reference

[`-  initWithModel:versionChecksum:`](/documentation/CoreData/NSManagedObjectModelReference/init(model:versionChecksum:))

Creates an object model reference for the specified model.

[`-  initWithFileURL:versionChecksum:`](/documentation/CoreData/NSManagedObjectModelReference/init(fileURL:versionChecksum:))

Creates an object model reference for the model at the specified file URL.

[`-  initWithName:inBundle:versionChecksum:`](/documentation/CoreData/NSManagedObjectModelReference/init(name:in:versionChecksum:))

Creates an object model reference for the named model in the specified bundle.

[`-  initWithEntityVersionHashes:inBundle:versionChecksum:`](/documentation/CoreData/NSManagedObjectModelReference/init(entityVersionHashes:in:versionChecksum:))

Creates an object model reference with the entities corresponding to the specified entity version hashes.

### Resolving the model object

[`resolvedModel`](/documentation/CoreData/NSManagedObjectModelReference/resolvedModel)

The resolved object model.

[`versionChecksum`](/documentation/CoreData/NSManagedObjectModelReference/versionChecksum)

The version checksum of the resolved model.

## Relationships

### Conforms To

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Equatable`](/documentation/Swift/Equatable)

[`CVarArg`](/documentation/Swift/CVarArg)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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