Hi, I have the xml file file this, perl script to create hash

<university>
<name>svu</name>
 <location>ravru</location>
 <branch>
   <electronics>
     <student name="mikky" number="12">
     <semester number="1"subjects="7" rank="2"/>
     </student>
     <student name="vijju" number="15">
     <semester number="1" subjects="7" rank="10"/>
     <semester number="2" subjects="4" rank="1"/>
      </student>
       <student name="shyam" number="16">
       <semester number="1"subjects="7" rank="2"/>
      <semester number="2"subjects="4" rank="2"/>
       </student>
    </electronics>
 </branch>
 </university>.
              . 
              .
              .
              .
              .
 <data>
 <student name="mikky" number="1" branch="computers" />
 <student name="vijju" number="2" branch="electronics" />
<student name="shyam" number="3" branch="EEE" />
<student name="csr" number="4" branch="IT" />
<student name="msr" number="5" branch="MEC" />
<student name="ssr" number="6" branch="computers" />
<student name="msr" number="1" branch="CIV" />
.............................
..............................
.....................
</data>
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how to create hash table for data elements. name and number as the key and branch is the value in that hash. why I need like this means some students have same name and some students have same number. by using this hash keys I have to search in the university node for student if found and print branch name of each student.

I written some script in XML::Simple but I am not able to create hash.

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

my $xml = new XML::Simple;
my $data = $xml->XMLin("data.xml", forcearray => [ 'student' , 'semist
+er'],                                                                
+                   KeyAttr=>{student=>"+Name"});

print Dumper($data);
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$var1={
      
      'data'=>{
                'student'=>[
                              {
                               'name'=>'mikky',
                               'number'=>'12',
                               'branch'=>'computers',
                                },

                               {
                               'name'=>'vijju',
                               'number'=>'15',
                               'branch'=>'electronics',
                                },

                               {
                               'name'=>'shyam',
                               'number'=>'16',
                               'branch'=>'EEE',
                                },
                              ],

             
        'university'=>{
               'name'=>'svu',
               'location'=>'ravru',
                 'branch'=>{
                     'electronics'=>{
                                'student'=>[
                                         {
                                        'name'=>'mikky',
                                         'number'=>'12',
                                           'semester'=>{
                                                  'Number'=>'1',
                                                  'subjects'=>'7',
                                                   'rank'=>'2'
                                                  }
                                               },
                                       {
                                        'name'=>'vijju',
                                         'number'=>'15',
                                           'semester'=>[
                                                {
                                               'number'=>'1',
                                                'subjects'=>'7',
                                                 'rank'=>'10'
                                                  },
                                                 {
                                                'number'=>'2',
                                                'subjects'=>'4',
                                                 'rank'=>'1'
                                                  }
                                                 ]
                                               }, 
                                         {
                                        'name'=>'shyam,
                                         'number'=>'15',
                                           'semester'=>[
                                                {
                                               'number'=>'1',
                                                'subjects'=>'7',
                                                 'rank'=>'2'
                                                  },
                                                 {
                                                'number'=>'2',
                                                'subjects'=>'4',
                                                 'rank'=>'2'
                                                  }
                                                 ]
                                               },     
                                            ]
                                          }
                                         }
                                       };
[download]

but I need to print only data node elements only not university node elements.please halp me.