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 # Version 2024 R2

 Last update: 09.03.2026 

The **2024 R2** version of the **Discovery APIs** contains the following changes and additions:

## Custom tree

- **Performance Enhancements**: Displaying objects in the custom tree now has performance comparable to the design tree, even for a large number of objects. The creation and update times are significantly improved.
- **Selection Synchronization**: The selection of objects in the custom tree is fully synchronized with their rendering. Actions such as hovering, selecting, and double-clicking in the tree are reflected in the rendering, and vice versa.
- **Drag and Drop**: An additional callback for drag-and-drop completion is provided, allowing the add-in to respond to the completion of the drop action.
- **Context Menu**: A right-click (RMB) entry for deleting custom objects is automatically created if the add-in permits object deletion.

## HUD

- **Tool Guide Arrangement**: The vertical and horizontal tool guide arrangement is respected according to the add-in definition in the XML file.
- **Automatic Validation**: Automatic validation for minimum and maximum values is provided for doubles and quantities used in text boxes, based on the add-in definition in the XML file.
- **Read-Only Option**: A read-only option is available to disable editing of controls while keeping the controls enabled.

## Variation table

- **Enhanced APIs**: An additional set of APIs is provided for object-oriented access to the rows and columns of the variation table.
- **Operation Feedback**: A return type is now provided to indicate the success of the solve operations within the variation table.

## API changes and incompatibilities

- **Deprecated APIs**: API versions V21 and below are marked as deprecated and will be removed in the next Discovery release.
- **Namespace Renaming:**
    
    
    - "ComponentTransferSharing" to "ComponentShareTopology"
    - "Appearance" to "Application"
    - `Physics.Entities.Parameters` to `Physics.Parameters`
- **Class Renaming:**
    
    
    - `Appearance.Properties` to `Application.DatumProperties`

## Other

- **Theme Access API**: An API is now available to access the theme used by the Discovery application.
- **VTU Export**: Results from the Explore stage can be exported in VTU format.