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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     When ZEROLENGTHFALSE is set, all comparisons between zero-length
     group items, and between zero-length items and figurative constants,
     will return false; when it is not set, they all return true.
 
     For conformance to ANSI and SAA you must set ZEROLENGTHFALSE.
                                    -♦-