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=item C<string>

Option containing a string. This is the default.

=back

Storage tells if the option is a single-value (default), multi-value
accumulator (e.g. may be specified in command line multiple times, and the
option arguments will be stored in an array) or multi-value hash accumulator
(similar, but option argument is specified as C<key=value>, and the value part
is validated). Note that this specify only type of storage, not the actual
container.

B<NOTE>: Don't specify option with a hash storage and that has sub-options
(see L</"Schema Definition">). Verification can't tell whether the value is
meant for the hash under this option or for one of its sub-options.

Presence of C<help> key indicates that this option should be exposed to
end-users in I<--help> message. Options lacking this key will be skipped (but
stil honoured by App::Getconf).