---
title: VNTrackObjectRequestRevision1
framework: vision
role: symbol
role_heading: Global Variable
path: vision/vntrackobjectrequestrevision1
---

# VNTrackObjectRequestRevision1

A constant for specifying revision 1 of the object tracking request.

## Declaration

```swift
var VNTrackObjectRequestRevision1: Int { get }
```

## See Also

### Identifying Request Revisions

- [VNTrackObjectRequestRevision2](vision/vntrackobjectrequestrevision2.md)