# NxLibraryMeasureDef Class

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

## Inheritance

* System.Object
  * [AbstractStructure](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AbstractStructure.htm)
    * NxLibraryMeasureDef

## Syntax

```
[ValueClass]
public class NxLibraryMeasureDef : AbstractStructure, IDisposable, INxLibraryMeasureDef, IAbstractStructure
```

## Constructors

| Name | Description |
| --- | --- |
| [NxLibraryMeasureDef()](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.-ctor.htm#Qlik_Engine_NxLibraryMeasureDef__ctor) | Creates an instance of the NxLibraryMeasureDef class |

## Properties

| Name | Description |
| --- | --- |
| [ActiveExpression](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.ActiveExpression.htm#Qlik_Engine_NxLibraryMeasureDef_ActiveExpression) | Index to the active expression in a measure.<br><br>JSON property name: qActiveExpression |
| [Def](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Def.htm#Qlik_Engine_NxLibraryMeasureDef_Def) | Definition of the measure.<br><br>JSON property name: qDef |
| [Expressions](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Expressions.htm#Qlik_Engine_NxLibraryMeasureDef_Expressions) | Array of expressions.<br><br>JSON property name: qExpressions |
| [Grouping](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Grouping.htm#Qlik_Engine_NxLibraryMeasureDef_Grouping) | Used to define a cyclic group or drill-down group.<br><br>Default value is no grouping.<br><br>This parameter is optional.<br><br>JSON property name: qGrouping |
| [Label](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Label.htm#Qlik_Engine_NxLibraryMeasureDef_Label) | Label of the measure.<br><br>JSON property name: qLabel |
| [LabelExpression](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.LabelExpression.htm#Qlik_Engine_NxLibraryMeasureDef_LabelExpression) | Optional expression used for dynamic label.<br><br>JSON property name: qLabelExpression |
| [NumFormat](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.NumFormat.htm#Qlik_Engine_NxLibraryMeasureDef_NumFormat) | Format of the field.<br><br>This parameter is optional.<br><br>JSON property name: qNumFormat |
| [ScriptGenerated](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.ScriptGenerated.htm#Qlik_Engine_NxLibraryMeasureDef_ScriptGenerated) | JSON property name: qScriptGenerated |