An update to the Open Menu Format has been released which changes the way IDs are handled for Menus, Menu Groups and Menu Items. The IDs are now a requirement and have been changed to a much more efficient numeric data type.
Why is this so important for the future of Open Menu?
Because all menus, menu groups and menu items will have an ID so they can be uniquely identified. This means a restaurant can publish their menu and track exactly how a menu, menu group or menu item is performing across all location displaying or using their menu. This is very powerful for restaurant review sites or restaurant search tools.