Members of hash arrays are accessed by specifying the hash reference and key separated by the dot '.' operator. 

    my $vars = {
  	'home' => 'http://www.myserver.com/homepage.html',
  	'page' => {
  	    'this' => 'mypage.html',
  	    'next' => 'nextpage.html',
  	    'prev' => 'prevpage.html',
  	},
    };
template: 

    <a href="[% home %]">Home</a>
    <a href="[% page.prev %]">Previous Page</a>
    <a href="[% page.next %]">Next Page</a>