# IVariableListDef Interface

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

Defines the list of variables in an app.

## Syntax

```
[ValueClass]
public interface IVariableListDef : IAbstractStructure
```

## Properties

| Name | Description |
| --- | --- |
| [Data](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IVariableListDef.Data.htm#Qlik_Engine_IVariableListDef_Data) | Data<br><br>JSON property name: qData |
| [ShowConfig](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IVariableListDef.ShowConfig.htm#Qlik_Engine_IVariableListDef_ShowConfig) | Shows the system variables if set to true.<br><br>JSON property name: qShowConfig |
| [ShowReserved](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IVariableListDef.ShowReserved.htm#Qlik_Engine_IVariableListDef_ShowReserved) | Shows the reserved variables if set to true.<br><br>JSON property name: qShowReserved |
| [ShowSession](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IVariableListDef.ShowSession.htm#Qlik_Engine_IVariableListDef_ShowSession) | Shows the session variables if set to true.<br><br>JSON property name: qShowSession |
| [Type](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IVariableListDef.Type.htm#Qlik_Engine_IVariableListDef_Type) | Type of variables to include in the list.<br><br>JSON property name: qType |