---
title: sessionID
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/photogrammetrysample/sessionid
---

# sessionID

If captured with ObjectCaptureSession, this will contain a UUID associated with the session. Note that any boundingBox or camera pose information will only be in a consistent coordinate system if the sessionID for those samples is the same.  In this sense, the sessionID is a tag that defines the coordinate system of all poses and transforms when comparing samples from multiple captures.

## Declaration

```swift
var sessionID: UUID? { get }
```