Hello again snehit.ar,

Try to replicate the problem solution based on the code that you give us.

Check the and update accordingly the code before replying! We can not help you with faulty data.

#!/usr/bin/env perl
use strict;
use warnings;
use XML::XPath;
use Data::Dumper;

my $xml = 'ApplicationList.xml';
my $xp = XML::XPath->new(filename => $xml);
my $appxpath =  $xp->findnodes("//application_list/application/");

my %appid = ();
foreach my $appnodeset ($appxpath->get_nodelist) {
    my $id   = $xp->find('./@id',$appnodeset)->string_value;
    my $name = $xp->find('./@name',$appnodeset)->string_value;
    s/^\s+|\s+$//g for $id,$name;
    $appid{$id} = $name;
}
print Dumper \%appid;

my $eventxml = 'events.xml';
my $evenxp = XML::XPath->new(filename => $eventxml);
my $xpath = "//event/custom_attribute_list/custom_attribute[normalize-
+space(name)='SSRID']/value";

my @eventrecords = ();
foreach my $node ($evenxp->findnodes($xpath)) {
    my $ssrid = $node->string_value;
    $ssrid =~ s/^\s+|\s+$//g ;
    if ( exists $appid{$ssrid} ){
    push @eventrecords,
    { eventid => $ssrid };
    }
}
print Dumper \@eventrecords;

__END__

$ perl test.pl
$VAR1 = {
          '957' => 'cccc',
          '2667' => 'aaaa',
          '1250' => 'dddd',
          '1103' => 'bbbb'
        };
$VAR1 = [];
[download]

Hope this helps, BR.