# LibraryId Property

## Overloads

| [LibraryId](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxAttrExprDef.LibraryId.htm#Qlik_Engine_INxAttrExprDef_LibraryId) |  | Definition of the attribute expression stored in the library.<br><br>Example: `"MyGenericMeasure"`<br><br>JSON property name: qLibraryId |
| --- | --- | --- |

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

## LibraryId

Definition of the attribute expression stored in the library.

Example: `"MyGenericMeasure"`

JSON property name: qLibraryId

### Declaration

```

          string LibraryId { get; set; }
    
  
```

### Property Value

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