[document web]
++[section]
++++[push button] name='Open Main Menu' label-for=[menu] name-from:contents
++++[menu] name='Open Main Menu' labelled-by=[push button] name-from:related-element
++++++[menu item] name='Submenu' label-for=[menu] name-from:contents
++++++[menu] name='Submenu' labelled-by=[menu item] name-from:related-element
++++++++[menu item] name='Item 1' name-from:contents