An object can call a method in any namespace by explicitly stating the namespace of that method: 
my $obj = ChildClass1->new;
$obj->ChildClass2::method(...);

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In addition, classes should not "export methods". The only functions that should be exported are non-object-associated.
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: a question on namespaces and inheritance by japhy
in thread a question on namespaces and inheritance by thcsoft

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