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    <university>
         <name>svu</name>
...
                </electronics>
             </branch>
     </university>

    $var1={
         university=>{
...
                                              ]
                                             }
                                           };

    my $template = Template->new();
     my $filename = 'output.tex';
...
          [% st.branch.electronics.section.1.sem.rank %]
       [%END%]
      /end{document}