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straight ASCII sort.

By default, each line of input is assumed to consist of a number of
tab-delimited fields, of which the first contains an LC-style call number or
class.

If no file is specified, or if the file name C<-> is specified, standard input
will be processed.

Normalization of call number ranges is a special challenge, because ranges are
not normally specified using the exact endpoint.  Consider the range C<B708-B713>; while
C<B708> does indicate the beginning point -- a no call number that comes before B 708 can
fall within the range -- the end point is only a guide, not a strict limit, since the intent
is that call numbers such as C<B 713 .H94> and C<B 713 .W55 L86> B<do> fall within the
range.  Unfortunately, ranges are often specified ambiguously; for example, the call number
C<B 713.14 G92> might or might not be considered to fall within this range.

=head1 OPTIONS

=over 4