This TML is helpful for macro developers to explorer the object model of a TBC project file. The tree view displays every object found (starting at the top level "Project" object). When an object is selected, the bottom area of the window will report every interface defined for that object. You can also see the full "namespace" of each object. In the example shown, you can tell that the arc is defined in the Trimble.Vce.ForeignCad namespace. This is helpful when using the "Object Browser" view in Visual Studio.