# File lib/mime/types.rb, line 301
      def simplified(content_type)
        matchdata = MEDIA_TYPE_RE.match(content_type)

        if matchdata.nil?
          simplified = nil
        else
          media_type = matchdata.captures[0].downcase.gsub(UNREG_RE, '')
          subtype = matchdata.captures[1].downcase.gsub(UNREG_RE, '')
          simplified = "#{media_type}/#{subtype}"
        end
        simplified
      end