---
title: archiveExtension
framework: arkit
role: symbol
role_heading: Type Property
path: arkit/arreferenceobject/archiveextension
---

# archiveExtension

The standard filename extension for exported ARReferenceObject instances.

## Declaration

```swift
class let archiveExtension: String
```

## Discussion

Discussion Use this filename extension when constructing a URL to save a reference object file with the export(to:previewImage:) method.

## See Also

### Saving Recorded Objects

- [export(to:previewImage:)](arkit/arreferenceobject/export(to:previewimage:).md)