Engine engine = getEngine(request, project);
PreferenceStore preferenceStore = project.getMetadata().getPreferenceStore();
TripleLoaderExporter exporter = new TripleLoaderExporter();
StringWriter triples = new StringWriter(10 * 1024 * 1024);
exporter.export(project, new Properties(), engine, triples);
String source_name = request.getParameter("source_name");
String source_id = request.getParameter("source_id");
String qa = request.getParameter("qa");
String mdo_id = null;