code: def postprocess_periodical(marc_xml, mods, uuid, counter, url):
      
      dom = double_linked_dom(mods)
  
      # TODO: Add more postprocessing
  
      add_missing_xml_attributes(dom, counter)
  
      if uuid:
          add_uuid(dom, uuid)
  
      return dom.prettify()
docs: Some basic postprocessing of the periodical publications.
  
      Args:
          marc_xml (str): Original Aleph record.
          mods (str): XML string generated by XSLT template.
          uuid (str): UUID of the package.
          counter (int): Number of record, is added to XML headers.
          url (str): URL of the publication (public or not).
  
      Returns:
          str: Updated XML.