The following table identifies the following attributes of an editor that describe its user experience with respect to multiple documents: ; Multiple instances: Whether multiple instances of the program can be open at the same time for editing multiple files (one in each instance). Applies both for
single-document interface (SDI) and
multiple-document interface (MDI). Also, applies for a program that has a user interface that looks like multiple instances of the same program (such as some versions of
Word). ; Single document window splitting: Whether a window can be split to simultaneously view different areas of a file. ; MDI overlappable windows: Whether each open document gets its own fully movable window inside the editor environment. ; MDI
tabbed document interface: Whether multiple documents can be viewed as tabs in a single window. ; MDI window splitting: Whether supports splitting the application window to show multiple documents (non-overlapping windows). ==Basic features==