Under natural sorting, numeric substrings are compared numerically, and other word-characters are compared lexically. When comparing two strings, where a numeric substring in one place is not up against a numeric substring in another, the non-numeric always comes first.
POD is readable with the 'perldoc' utility.
See ChangeLog for recent changes. Visit to find a CPAN site near you. Copyright 2001, Sean M. Burke , all rights reserved.