private void notify(String localJID, Relation relation) {
final DOMDocument domDocument = new DOMDocument();
final Element entryElement = (Element) domDocument.appendChild(domDocument.createElementNS(Onesocialweb.NAMESPACE, Onesocialweb.RELATION_ELEMENT));
final RelationDomWriter writer = new DefaultRelationDomWriter();
writer.write(relation, entryElement);
domDocument.removeChild(entryElement);
final Message message = new Message();
message.setFrom(localJID);
message.setType(Message.Type.headline);
org.dom4j.Element eventElement = message.addChildElement("event", "http://jabber.org/protocol/pubsub#event");