See here for the deprecated syntax using the slot-scope attribute. See here for the deprecated phrase structure making use of the slot quality. The Worldwide Airport Port slot demo spadegaming Guidelines (WASG) defines a flight terminal slot as a permission given by an organizer for a prepared procedure to use the full range of airport infrastructure required to get here or depart at a Level 3 flight terminal on a specific date and time. That claimed, scoped slots are still useful in instances where we require to both encapsulate reasoning and make up aesthetic result, like in the example.