* Get the structure as an XML Document.
* @return XML Document.
*/
public Document getDocument() {
Document tmp = DocumentHelper.createDocument();
DocumentType type = new DOMDocumentType();
type.setElementName(DOCUMENT_ROOT);
type.setSystemID(DOCUMENT_DTD);
tmp.setDocType(type);
Element questestinterop = tmp.addElement(DOCUMENT_ROOT);
this.assessment.addToElement(questestinterop);
return tmp;