StringBuilder stdbuf = new StringBuilder(256);
stdbuf.append(" - free(init): " + StringUtils.displayBytesSize(free));
StopWatch sw = new StopWatch("[Xbird] " + queryFile);
XQueryProcessor processor = new XQueryProcessor();
XQueryModule mod = processor.parse(new FileInputStream(queryFile), new File(DOC_BASE).toURI());
processor.compile(mod);
System.err.println(mod.getExpression().toString());
Sequence result = processor.execute(mod);
StringWriter res_sw = new StringWriter();
Serializer ser = new SAXSerializer(new SAXWriter(res_sw), res_sw);
ser.emit(result);