code: private static List<TransformationDescription> loadDescrtipionsFromXMLInputSource(InputSource source,
              String fileName) throws Exception {
          XMLReader xr = XMLReaderFactory.createXMLReader();
          TransformationDescriptionXMLReader reader = new TransformationDescriptionXMLReader(fileName);
          xr.setContentHandler(reader);
          xr.parse(source);
          return reader.getResult();
      }
docs: Does the actual parsing.