# Expr Property

## Overloads

| [Expr](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxDerivedField.Expr.htm#Qlik_Engine_INxDerivedField_Expr) |  | Expression of the derived field.<br><br>Example:<br><br>If `qName` is `OrderDate.MyDefinition.Year` , the expression is as follows:<br><br><br>`=${Mydefinition(OrderDate).Year}`<br><br>JSON property name: qExpr |
| --- | --- | --- |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxDerivedField.Expr.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxDerivedField.Expr.htm)

## Expr

Expression of the derived field.

Example:

If `qName` is `OrderDate.MyDefinition.Year` , the expression is as follows:

`=${Mydefinition(OrderDate).Year}`

JSON property name: qExpr

### Declaration

```

          string Expr { get; set; }
    
  
```

### Property Value

| Type | Description |
| --- | --- |
| System.String |  |