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=item * B<E<lt>maxFilesE<gt>> The maximum number of backup files preserved in the E<lt>targetDirE<gt>
directory. As soon as this number is breached, the oldest backup file is removed (rolling behaviour).

=item * B<E<lt>frequencyE<gt>> The period of time between two consecutive backups of the current
E<lt>sourceDirE<gt>. This is specified by a string of type C<n[dmy]>, where n is a number and the 
second letter is either C<d> for days, C<m> for months or C<y> for years. Internally, C<1m = 30d>
and C<1y = 360d>, wihtout considering months of 28 or 31 days. 

=item * B<E<lt>sourceDirE<gt>> The path for the directory structure to be backed up. It requires
a B<CDATA> xml tag to escape the slashes in the full path.

=item * B<E<lt>targetDirE<gt>> The path for the destination directory where backup files are stored. It requires
a B<CDATA> xml tag to escape the slashes in the full path. Typically this will be a single location on the disk,
and hence the same for all tasks and specified in the E<lt>defaultE<gt> section.

=back

=back

=head2 USAGE

This perl module was written with an automated backup functionality in mind. So, even if it can
be run manually and on demand, it is best suited to be integrated in a regular batch (overnight maybe)