my $xc = XML::LibXML::XPathContext->new($root);
$xc->registerNs(e => 'http://explain.z3950.org/dtd/2.0/');
my $title = $xc->find("e:databaseInfo/e:title");
my $xc = XML::LibXML::XPathContext->new($root);
$xc->registerNs(e => 'http://explain.z3950.org/dtd/2.0/');
my $title = $xc->find("e:databaseInfo/e:title");