my $xc = XML::LibXML::XPathContext->new($root);
$xc->findnodes('/HOSTNAME/PATROL/ACL/USERNAME')
$sections->findnodes('./PERMISSION')

##</code><code>##

$root->findnodes('/HOSTNAME/PATROL/ACL/USERNAME')
$sections->findnodes('./PERMISSION')

##</code><code>##

my $xc = XML::LibXML::XPathContext->new( $root );
$xc->findnodes('/HOSTNAME/PATROL/ACL/USERNAME')
$xc->findnodes('./PERMISSION', $sections)

##</code><code>##

$xc->findnodes('PERMISSION', $section)