The following steps describe how a third party application can add menu items to the menu system:
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
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.