[document web]
++[push button] name='up' controller-for=[section]
++[push button] name='prev' controller-for=[section]
++[push button] name='next' controller-for=[section]
++[push button] name='down' controller-for=[section]
++[section] controlled-by=[landmark,push button,push button,push button,push button]
++++[section] details-for=[link]
++++++[static] name='One'
++++[section] details-for=[link]
++++++[static] name='Two'
++++[section] details-for=[link]
++++++[static] name='Three'
++[landmark] controller-for=[section]
++++[link] details=[section] details-from:css-scroll-marker-pseudo-element
++++[link] details=[section] details-from:css-scroll-marker-pseudo-element
++++[link] details=[section] details-from:css-scroll-marker-pseudo-element