Install desktop entries to datadir/applications/ for each menu item. Please namespace the filename, as in "vendor-foo.desktop", or use a subdirectory of datadir/applications/ so you have "vendor/foo.desktop." Please be sure all desktop entries are valid (see the desktop-file-utils package for a validation utility).

Install an XML menu file to sysconfdir/menus/applications-merged/ to add any submenus, if your desktop entries aren't already included in some common categories.

Install any directory entries needed for your submenus to datadir/desktop-directories/, taking care to namespace and validate the directory entries.