---
title: VNTrackObjectRequestRevision2
framework: vision
role: symbol
role_heading: Global Variable
path: vision/vntrackobjectrequestrevision2
---

# VNTrackObjectRequestRevision2

A constant for specifying revision 2 of the object tracking request.

## Declaration

```swift
var VNTrackObjectRequestRevision2: Int { get }
```

## See Also

### Identifying Request Revisions

- [VNTrackObjectRequestRevision1](vision/vntrackobjectrequestrevision1.md)