Something like this may help?

package Tree;

sub new {
    my $class = shift;

    my $self = { 
            'name'  => $name,
            'root'  => undef,
        };
    return bless $self, $class;
}

sub addParent {
    my $self = shift; 
    my $parent = shift;

    $self->{'parent'} = $parent;
}

sub getParent {
    my $self = shift; 
    return $self->{'parent'};
}

sub setInherits {
    my $self = shift; 
    my $inherits = shift;

    $self->{'inherits'} = $inherits;
}

sub getInherits {
    my $self = shift; 
    return $self->{'inherits'};
}

sub getRoot {
    my $self = shift;
    return $self->{"root"} if (exists $self->{"root"});


    if (defined $self->{"parent"}) {
        $self->{"root"} = $self->{"parent"}->getRoot();
    } else {
        $self->{"root"} = $self;
    }

    return $self->{"root"};
}

return "Tree";
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And you can create several "Tree"s as Nodes, doing a tree.