---
title: valueExpression
framework: coredata
role: symbol
role_heading: Instance Property
path: coredata/nspropertymapping/valueexpression
---

# valueExpression

The value expression for the property mapping.

## Declaration

```swift
var valueExpression: NSExpression? { get set }
```

## Discussion

Discussion The expression is used to create the value for the destination property.

## See Also

### Managing Mapping Attributes

- [name](coredata/nspropertymapping/name.md)
- [userInfo](coredata/nspropertymapping/userinfo.md)