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in reply to Is there any XML reader like this?

How does this differ from what you want?:

C:\test>junk44
{
  station17 => {
                 ip => [
                         "10.0.0.121",
                         "10.0.1.121",
                         "10.0.0.122",
                         "10.0.0.123",
                         "10.0.1.123",
                       ],
               },
  station18 => {
                 ip => [
                         "10.0.0.101",
                         "10.0.1.101",
                         "10.0.0.102",
                         "10.0.0.103",
                         "10.0.1.103",
                       ],
               },
  station19 => {
                 ip => [
                         "10.0.0.111",
                         "10.0.1.111",
                         "10.0.0.112",
                         "10.0.0.113",
                         "10.0.1.113",
                       ],
               },
}

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The program that produced the above from your sample data in the __DATA__:

#! perl -slw
use strict;
use Data::Dump qw[ pp ];
use XML::Simple;

my $xml = XMLin( \*DATA );
pp $xml;

__DATA__
...

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