DOM + XML + InputStream

builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();

			Document doc = builder.newDocument();

			Element root = doc.createElement("response");
			doc.appendChild(root);
			
			Passport passport = response.getPassport();

			Element e1 = createProperty(doc, "passport.id", passport.getId().toString());
			Element e2 = createProperty(doc, "passport.user.id", passport.getUser().getId().toString());
			Element e3 = createProperty(doc, "passport.equivalence.id", passport.getEquivalence().getId().toString());
			Element e4 = createProperty(doc, "passport.localization.id", passport.getLocalization().getId().toString());

			root.appendChild(e1);
			root.appendChild(e2);
			root.appendChild(e3);
			root.appendChild(e4);