# File MIME/types.rb, line 83
        def Type.simplified(content_type)
            md = @@content_type_re.match(content_type)
            if not md.nil?
                mt = md[1]
                st = md[2]
                s = ""
                s << mt.downcase.gsub(/^x-/, '') << '/' << st.downcase.gsub(/^x-/, '')
            else
                nil
            end
        end