What are MDI and SDI? (Magic xpa 3.x)

In the Microsoft® Windows® operating system, a window with a title bar is sometimes referred to as a document. There are many methods of handling windows; two of them are MDI and SDI:

Multiple Document Interface (MDI): An MDI lets you open more than one document at the same time. The MDI has a parent window, and any number of child windows. The child windows usually share various parts of the parent window’s interface, including the menu bar, toolbar and status bar. Therefore, an MDI is constrained to the parent window.

Single Document Interface (SDI): An SDI opens each document in its own primary window. Each window has its own menu, toolbar, and entry in the task bar. Therefore, an SDI is not constrained to a parent window. This makes it easier for the user to view the contents of the various windows.