my $foster_home = XML::LibXML::Document->new("1.0", "UTF-8");

# Register the namespaces:
$cve_xc->registerNs( def => 'http://scap.nist.gov/schema/feed/vulnerability/2.0' );
$cve_xc->registerNs( vuln => 'http://scap.nist.gov/schema/vulnerability/0.4' );
$cve_xc->registerNs( cvss => 'http://scap.nist.gov/schema/cvss-v2/0.2' );

# Find the appropriate CVE entry in the data source:
for my $entry ( $cve_xc->findnodes( "/def:nvd/def:entry[\@id = '$cve_id']" )) {
	if ( my ( $metrics ) = $cve_xc->findnodes( 'vuln:cvss/cvss:base_metrics', $entry )) {
	
		($av) = $cve_xc->find('cvss:access-vector', $metrics);
		($ac) = $cve_xc->find('cvss:access-complexity', $metrics);
		($au) = $cve_xc->find('cvss:authentication', $metrics);
		($ci) = $cve_xc->find('cvss:confidentiality-impact', $metrics);
		($ii) = $cve_xc->find('cvss:integrity-impact', $metrics);
		($ai) = $cve_xc->find('cvss:availability-impact', $metrics);
		
	}
	else {
		$av = "";
		$ac = "";
		$au = "";
		$ci = "";
		$ii = "";
		$ai = "";
	}
}
$av->setOwnerDocument($foster_home);
$ac->setOwnerDocument($foster_home);
$au->setOwnerDocument($foster_home);
$ci->setOwnerDocument($foster_home);
$ii->setOwnerDocument($foster_home);
$ai->setOwnerDocument($foster_home);