zone
The zone element is a child of the building element. You can only submit one instance of the zone element. None of it's elements are required so you can just submit those you want to set or change.
Notes
If wall_construction_same is set to 1 then the wall_assembly_code from the front zone_wall instance will be used for all four walls.
If window_construction_same is set to 1 then the zone_window information (except window_area) from the front zone_wall instance will be used for all four walls.