my $template = Template->new();
my $filename = 'output.tex';
$template->process(\*DATA, $data, $filename)
    || die "Template process failed: ", $template->error(), "\n";

system( "pdflatex $filename" );
__DATA__
\documentclass[a4paper,leqno,twoside]{article}
\begin{document}

[% FOREACH st IN university %]
[% st.name %] 
[%st.location%]
studentdata:
[% FOREACH student IN st.branch.electronics.student %]
Component type: [%+ student.name +%][%+ student.number +%]
       [% FOREACH semester IN student.semester %]
   [%+ semester.number +%]
   [%+ semester.subjects +%]
   [%+  semester.rank +%]
     [% END %]
	 [% END %]
[% END %]