code: function(req, res, next) {
          var initialTime = req.query.time,
              receivedReqTime = new Date().getTime(),
              filename = req.params.filename,
              absolutePathToFile = ontoDir + '/' + filename,
              extension = path.extname(absolutePathToFile),
              contentType = mime.contentType(extension);
  
          if(contentType) {
              req.mimeType = contentType.replace(/;.*/g, '');
          } else {
              req.mimeType = contentType;
          }
  
          req.requestDelay =  receivedReqTime - initialTime;
  
          fs.readFile(absolutePathToFile, function(err, data) {
              if(err) {
                  res.status(500).send(err.toString());
              } else {
                  req.rawOntology = data.toString().replace(/(&)([a-z0-9]+)(;)/gi, '$2:');
                  next();
              };
          });
      }
docs: OWL File content to text
  @param req
  @param res
  @param next