Hi again

I was fortunate enough yesterday to have the author of XML::Twig answer my question, and Mirod was very helpful, but unfortunately I still have one question remaing that I can't seem to find the answer to in the perldoc or elsewhere. I'm using the following code

#!/perl/bin/perl -w

use strict;
use XML::Twig;

my $twig= new XML::Twig;

open( XML_OUT, ">output.xml") or die $!;

$twig->parsefile( "RoamAboutAP_172.108.251.49.xml");
my $root= $twig->root; 
my $children= $twig->children; 

my @ds= $root->children('ds');   
my @rra= $children-> # Not sure of the syntax for children of children
+;  

foreach my $attr (@ds) { 
    my $test= "TESTING PLACEMENT FOR DS";          
    my $eblg= new XML::Twig::Elt( 'Average', $test); 
    $eblg->paste( 'first_child', $attr);
}

foreach my $attr (@rra) { 
    my $test= "TESTING PLACEMENT FOR RRA";          
    my $eblg= new XML::Twig::Elt( 'Average', $test); 
    $eblg->paste( 'first_child', $attr);
}

# $twig->set_pretty_print('indented');
$twig->print( \*XML_OUT);

close XML_OUT;
[download]

This is my pseudo XML file:

<root>
  <child>
    <children>foo_bar</children>
  </child>
</root>
[download]

How can I navigate to a specific child of root, i.e. child or children?

Thanks again for all the help