protected function appendTypes(DOMElement $element, Resource $resource)
{
$types = $element->ownerDocument->createElement('wsdl:types');
$schema = $element->ownerDocument->createElementNS('http://www.w3.org/2001/XMLSchema', 'xs:schema');
$schema->setAttribute('targetNamespace', $this->targetNamespace);
$schema->setAttribute('elementFormDefault', 'qualified');
$schema->setAttribute('xmlns:tns', $this->targetNamespace);
$xsdGenerator = new Xsd($this->targetNamespace);
$xsdGenerator->appendSchema($schema, $resource);
$types->appendChild($schema);
$element->appendChild($types);
}
