Class->constant;
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Not really, Class->constant won't inherit from Superclass->constant ; it needs to be defined in both.

however $classObject->constant will inherit constants from superclass as class object methods , and allow the ability to override

so...

package aaa;
use constant HELLO=> 'world';
use constant PUNCTUATION=> '!';
sub new { #std constructor here }

package bbb;
our @ISA= qw( aaa );
use constant HELLO=> 'universe';

package main;
my $a= aaa->new();
my $b= bbb->new();

print "\n Hello " . $a->HELLO . $a->PUNCTUATION ;
print "\n Hello " . $b->HELLO . $b->PUNCTUATION ;
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will get you

Hello world!
Hello universe!
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but bbb->PUNCTUATION doesn't exist

but bbb->PUNCT­UATION doesn't exist

Did you try it?

package aaa;
use constant HELLO=> 'world';
use constant PUNCTUATION=> '!';

package bbb;
our @ISA= qw( aaa );
use constant HELLO=> 'universe';

package main;

print "\n Hello ", aaa->HELLO(), aaa->PUNCTUATION();
print "\n Hello ", bbb->HELLO(), bbb->PUNCTUATION();
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produces:

 Hello world!
 Hello universe!
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- tye