text: from ietf.submit.parsers.base import FileParser
  
  
  class PDFParser(FileParser):
      ext = 'pdf'
      mimetypes = ['application/pdf', ]
  
      # If some error is found after this method invocation
      # no other file parsing is recommended
      def critical_parse(self):
          super(PDFParser, self).critical_parse()
          return self.parsed_info
  