您好，但是我覺得如果使用layer標籤，會導致其他如公路等的問題，building:part仍可修改是甚麼樣的大樓，但因為有爭議，我不會再編輯新的，謝謝您的提醒
Hello, but I think if the layer tag is used, it will cause other problems such as highways. Building:part can still modify what kind of building it is, but because of the controversy, I will not edit new ones. Thank you for your reminder.