---
title: identifier
framework: sensorkit
role: symbol
role_heading: Instance Property
path: sensorkit/srfacemetricsexpression/identifier
---

# identifier

An identifier for the facial expression.

## Declaration

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

## Discussion

Discussion The possible values for a partial facial expression are:  |   |   |   |   |   |   |   |   |  The possible values for a whole facial expression are:  |   |   |   |   |   |   |   |

## See Also

### Getting the expression identifier and analysis

- [value](sensorkit/srfacemetricsexpression/value.md)