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# NSManagedObjectModelReference

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

```
class NSManagedObjectModelReference
```

## Topics

### Creating a reference

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

Creates an object model reference for the specified model.

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

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

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

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

[`init(entityVersionHashes:in: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.


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