The first kind of requests is relative to the parent relationship between windows: a client can request to change the parent of a window, or can request information about the parenthood of windows.
還有其他的請求和事件，有一種請求是有關視窗之間的親屬關係：客戶端可請求改變視窗的父視窗，或請求關於父視窗的資訊。