---
title: SRFaceMetricsExpression
framework: sensorkit
role: symbol
role_heading: Class
path: sensorkit/srfacemetricsexpression
---

# SRFaceMetricsExpression

An object that represents a facial expression.

## Declaration

```swift
class SRFaceMetricsExpression
```

## Overview

Overview Use the identifier property to determine the facial expression.

## Topics

### Getting the expression identifier and analysis

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

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Getting face analytics

- [faceAnchor](sensorkit/srfacemetrics/faceanchor.md)
- [partialFaceExpressions](sensorkit/srfacemetrics/partialfaceexpressions.md)
- [wholeFaceExpressions](sensorkit/srfacemetrics/wholefaceexpressions.md)