Navigate to the SVG child (lightblue box) and click to activate it. You should now have access to the links inside the SVG.
Make sure you can click on any of these links ('SVG-Link 1' to 'SVG-Link 5'). Next, it should be possible to navigate back to 'XHTML-Link 1' and 'XHTML-Link 2', by leaving the hierarchical SVG child. On devices with no dedicated 'back' or 'exit' key (but with two or more soft/function keys), it should be possible to deactivate the hierarchical SVG child, by pressing 'Soft 2' for at least two seconds.