Adding tooltips to menu entries defined in an XML file?

[Pierre Sarrazin <sarrazip sympatico ca>]

Hi.  I am using Gtk::UIManager::add_ui_from_file() to load the
menubar and toolbar from an XML file.  The resulting menu entries
do not come with tooltips.  Is it possible to add tooltips in
the <menuitem> tags in the XML file (in a way that works with
GNU Gettext)?

If not, is there a way to associate internationalized tooltips to
action names?  Thanks.

-- 
Pierre Sarrazin <sarrazip at sympatico dot ca>