| Microsoft DirectX 8.1 (C++) |
The XTL format defines the following elements.
| Element | Description |
| at | Specifies a time-based setting for a param element. |
| clip | Specifies a source file. |
| composite | Defines a composition. |
| effect | Defines an effect. |
| group | Defines a group (audio or video). |
| linear | Specifies a time-based setting for a param element. |
| param | Specifies the value of a property on a transition, effect, or other subobject. |
| timeline | Defines the timeline. |
| track | Defines a track. |
| transition | Defines a transition. |