windowing
A technique to determine the century of the year when it is represented by a two-digit shortcut (for example, "98" for "1998"). The two-digit year shortcut is compared to a threshold set within a 100-year range ("window") that generally spans two centuries. If the two-digit shortcut is equal to or greater than the threshold, the year is interpreted as in the earlier century of the window. If the two-digit shortcut is less than the threshold, the year is interpreted as in the later century of the window.
For example, if the threshold is set to 28 (the "window" is actually 1928-2027), a two-digit shortcut less than 28 will be interpreted as 20xx (the 21st century). A two-digit shortcut equal to or greater than 28 will be interpreted as 19xx (the 20th century).
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