# NxDerivedField Class

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

## Inheritance

* System.Object
  * [AbstractStructure](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AbstractStructure.htm)
    * NxDerivedField

## Syntax

```
[ValueClass]
public class NxDerivedField : AbstractStructure, IDisposable, INxDerivedField, IAbstractStructure
```

## Constructors

| Name | Description |
| --- | --- |
| [NxDerivedField()](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxDerivedField.-ctor.htm#Qlik_Engine_NxDerivedField__ctor) | Creates an instance of the NxDerivedField class |

## Properties

| Name | Description |
| --- | --- |
| [Expr](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxDerivedField.Expr.htm#Qlik_Engine_NxDerivedField_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 |
| [Id](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxDerivedField.Id.htm#Qlik_Engine_NxDerivedField_Id) | Identifier of the derived field.<br><br>The identifier is unique.<br><br>JSON property name: qId |
| [Method](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxDerivedField.Method.htm#Qlik_Engine_NxDerivedField_Method) | Method name associated to the derived field.<br><br>JSON property name: qMethod |
| [Name](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxDerivedField.Name.htm#Qlik_Engine_NxDerivedField_Name) | Combination of field name, definition and method.<br><br>Example:<br><br><br>`OrderDate.MyDefinition.Year`<br><br>JSON property name: qName |
| [Tags](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxDerivedField.Tags.htm#Qlik_Engine_NxDerivedField_Tags) | List of tags.<br><br>JSON property name: qTags |