<Item>
<data1 >  <data3> date </data3> </data1>
<data2>   data2 </data2>

</Item>
<item>
<data1 >  <date3> data22 </data3> </data1>
<data2>   data2 </data2>
<.Item>
....

use strict; use warnings;

use XML::Twig;

my $data = <<END_DATA;
<items>
    <item>
        <data1>   data1 </data1>
        <data2>   data2 </data2>
    </item>
    <item>
        <data1>   data1 </data1>
        <data2>   data2 </data2>
    </item>
</items>
END_DATA


my $t = XML::Twig->new(
    twig_handlers => {
        'item' => sub {
            # process each item and print contents of dataN elements
            print
                $_->first_child_trimmed_text('data1'), "t",
                $_->first_child_trimmed_text('data2'),"n";
        },
    },
)->parse($data);