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package Baseclass;
# common attributes and methods
...
use base 'Baseclass';
my @values = (...);
sub use_values { ... }

package Subclass_1;
use base 'Baseclass';
...
   my @values = (...);
   ...
}

package Subclass_1;
use base 'Baseclass';
...
  my @values = (...);
  sub use_values { ... }
}