use XML::Fast;
use Template;
use Data::Dumper;

my $xml = <<'XML';
<student>
    <number>24</number>
    <education>bachelors</education>
    <specialization>computers</specialization>
    <address>
        <house_number>128</house_number>
        <street_name>xxxx</street_name>
        <proddutoor/>
    </address>
</student>
<student>
    <number>23</number>
    <education>ph.d.</education>
    <specialization>physics</specialization>
    <address>
        <house_number>12</house_number>
        <street_name>yyyy</street_name>
        <kadapa/>
    </address>
</student>
XML
my $xml_hash = xml2hash $xml;
print Dumper($xml_hash),$/;

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

__DATA__
\documentclass{article}

\title{Roster}
\author{pavani}

\begin{document}
\maketitle

[% FOREACH st IN student %]
Student [% st.number %] is a [% st.specialization %] [% st.education %] student and his address is [% st.address.house_number +%] [% st.address.street_name %].
[% END %]

\end{document}