---
title: identifier
framework: vision
role: symbol
role_heading: Instance Property
path: vision/vnclassificationobservation/identifier
---

# identifier

Classification label identifying the type of observation.

## Declaration

```swift
var identifier: String { get }
```

## Discussion

Discussion An example classification could be a string like cat or hotdog.  The model used for the classification defines the domain of strings that may result.  Usually, these strings are unlocalized technical labels not meant for direct presentation to the end user.