Save DOM

Question

Hello,
How can i save the created dom file to a new xml file?
Thanks in advance
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.util.*;
public class XMLReader {
        public static void main(String argv[]) {
                try {
                        File file = new File("personnel.xml");
                        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                        DocumentBuilder db = dbf.newDocumentBuilder();
                        Document doc = db.parse(file);
                        doc.getDocumentElement().normalize();
                        System.out.println("Personnel" + doc.getDocumentElement().getNodeName());
                        NodeList nodeLst = doc.getElementsByTagName("person id");
                        System.out.println("Information of all employees");
                        ArrayList<Employee> empList = new ArrayList<Employee> ();
                        for (int s = 0; s < nodeLst.getLength(); s++) {
                            Employee emp = new Employee ();
                                Node fstNode = nodeLst.item(s);
                                if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
                                        Element fstElmnt = (Element) fstNode;
                                        NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("firstname");
                                        Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
                                        NodeList fstNm = fstNmElmnt.getChildNodes();
                                        System.out.println("First Name : " + ((Node) fstNm.item(0)).getNodeValue());
                                        emp.firstName = ((Node) fstNm.item(0)).getNodeValue();
                                        NodeList lstNmElmntLst = fstElmnt.getElementsByTagName("lastname");
                                        Element lstNmElmnt = (Element) lstNmElmntLst.item(0);
                                        NodeList lstNm = lstNmElmnt.getChildNodes();
                                        System.out.println("Last Name : " + ((Node) lstNm.item(0)).getNodeValue());
                                        emp.lastName = ((Node) fstNm.item(0)).getNodeValue();
                } catch (Exception e) {
                        e.printStackTrace();
class Employee {
    public String person_id;
    public String firstName;
    public String lastName;
    public Address address;
    public String phone;
class Address {
    public String street;
    public String house_number;
    public String town;
    public String zip;
}

Answer 1

Those "xinclude tags" (as you call them) are just some XML elements, aren't they? Then just write those XML elements.
Or is your question that you need to know what got included via XInclude and you need to reverse the process?