# Def Property

## Overloads

| [Def](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasure.Def.htm#Qlik_Engine_NxLibraryMeasure_Def) |  | JSON property name: qDef |
| --- | --- | --- |

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

## Def

JSON property name: qDef

### Declaration

```

          public string Def { get; set; }
    
  
```

### Property Value

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

### Implements

[INxLibraryMeasure.Def](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxLibraryMeasure.Def.htm#Qlik_Engine_INxLibraryMeasure_Def)