(WORK IN PROGRESS) XML hierarchy using jdom2 - for Open Marine XML v2.0 http://wiki.openmarine.org/index.php/OpenMarineXML_Version_2.0

OpenMarine.java

import java.io.*;

import org.jdom2.*;
import org.jdom2.filter.Filters;
import org.jdom2.input.*;
import org.jdom2.output.XMLOutputter;
import org.jdom2.xpath.XPathExpression;
import org.jdom2.xpath.XPathFactory;

import javax.print.attribute.standard.DateTimeAtCompleted;
import java.io.File;
import java.util.List;
import java.util.*;

import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;

public class Main {
    private static void log(String aMessage) {
        System.out.println(aMessage);
    }

    public static void main(String[] args) throws Exception {

        DateTimeFormatter parser2 = ISODateTimeFormat.dateTimeNoMillis();
        String jtdate = "2010-01-01T12:00:00+01:00";

        Element om = new Element("open_marine");
        om.setAttribute("version", "1.0");
        om.setAttribute("language", "english");
        om.setAttribute("origin", "MTM/YachtMarket/BoatsAndOutBoards");
        om.setAttribute("date", parser2.parseDateTime(jtdate).toString());

        //Offices
        Element office = new Element("office").setAttribute("id", "")
                .addContent(new Element("office_name"))
                .addContent(new Element("email"))
                .addContent(new Element("name")
                        .addContent(new Element("title"))
                        .addContent(new Element("forename"))
                        .addContent(new Element("surname")))
                .addContent(new Element("address"))
                .addContent(new Element("town"))
                .addContent(new Element("county"))
                .addContent(new Element("country"))
                .addContent(new Element("postcode"))
                .addContent(new Element("daytime_phone"))
                .addContent(new Element("evening_phone"))
                .addContent(new Element("fax"))
                .addContent(new Element("mobile"))
                .addContent(new Element("website"));
        Element off_emt = new Element("offices").addContent(office);

        Element boat_features = new Element("boat_features")
                .addContent(new Element("dimensions"))
                .addContent(new Element("build"))
                .addContent(new Element("gallery"))
                .addContent(new Element("engine"))
                .addContent(new Element("engine"))
                .addContent(new Element("navigation"))
                .addContent(new Element("accommodation"))
                .addContent(new Element("safety_equipment"))
                .addContent(new Element("rig_sails"))
                .addContent(new Element("electronics"))
                .addContent(new Element("general"))
                .addContent(new Element("equipment"));

        Map item = new HashMap();
        item.put("boat_name", "");
        item.put("owners_comment", "");
        item.put("reg_details", "");
        item.put("known_defects", "");
        item.put("range", "");
        item.put("last_serviced", "");
        item.put("passenger_capacity", "");
        Set st = item.entrySet();
        Iterator it = st.iterator();

        while (it.hasNext()) {
            Map.Entry m = (Map.Entry) it.next();
            boat_features.addContent(new Element("item")
                    .setAttribute("name", (String) m.getKey())
                    .setText((String) m.getValue()));
        }

        //Adverts
        Element advert_media = new Element("advert_media").addContent(
                new Element("media").setAttribute("type", "MIME Media Type")
                        .setAttribute("caption", "")
                        .setAttribute("primary", "")
        );
        Element advert_features = new Element("advert_features")
                .addContent(new Element("boat_type"))
                .addContent(new Element("boat_category"))
                .addContent(new Element("new_or_used"))
                .addContent(new Element("vessel_lying").setAttribute("country", ""))
                .addContent(new Element("asking_price").setAttribute("poa", "").setAttribute("currency", "").setAttribute("vat_included", ""))
                .addContent(new Element("marketing_descs").addContent(new Element("marketing_desc").setAttribute("language", "")))
                .addContent(new Element("manufacturer"))
                .addContent(new Element("model"))
                .addContent(new Element("other").addContent(new Element("item").setAttribute("name", "").setAttribute("label", "")));
        Element advert = new Element("advert").setAttribute("ref", "").setAttribute("ofice_id", "").setAttribute("status", "")
                .addContent(advert_media)
                .addContent(advert_features)
                .addContent(boat_features);


        Element ad_emt = new Element("adverts").addContent(advert);


        om.addContent(
                new Element("broker").setAttribute("code", "")
                        .addContent(new Element("broker_details").addContent(new Element("company_name").setText("")))
                        .addContent(off_emt)
                        .addContent(ad_emt)
        );


        Document doc_open_marine = new Document(om);

        XMLOutputter out = new XMLOutputter();
        out.output(doc_open_marine, System.out);
    }
}