anchor.diff:       % Min-Expires
        ?_assertEqual(213, parse('min-expires', <<"213">>)),
        ?_assertEqual(<<"213">>, format('min-expires', 213)),
  +
  +     % MIME-Version
  +     ?_assertEqual({1, 0}, parse('mime-version', <<"1.0">>)),
  +     ?_assertEqual(<<"1.0">>, format('mime-version', {1, 0})),
   
   
   
  
positive.code:                                    {'date', <<"Sat, 13 Nov 2010 23:29:00 GMT">>}, {'error-info', <<"<sip:not-in-service-recording@atlanta.com>">>},
                                     {'expires', <<"213">>}, {'from', <<"sip:alice@localhost">>},
                                     {'in-reply-to', <<"70710@saturn.bell-tel.com, 17320@saturn.bell-tel.com">>}, {'max-forwards', 70},
                                     {'min-expires', <<"213">>},
  
  
                                     {'content-length', <<"5">>}, {'via', <<"SIP/2.0/UDP localhost">>},
  
negative.code:                      "Date: Sat, 13 Nov 2010 23:29:00 GMT\r\nError-Info: <sip:not-in-service-recording@atlanta.com>\r\n",
                       "Expires: 213\r\nFrom: sip:alice@localhost\r\n",
                       "In-Reply-To: 70710@saturn.bell-tel.com, 17320@saturn.bell-tel.com\r\nMax-Forwards: 70\r\n",
                       "Min-Expires: 213\r\nMIME-Version: 1.0\r\n",
  
                       "Content-Length: 5\r\nVia: SIP/2.0/UDP localhost\r\n",
                       "To: sip:bob@localhost\r\n"
  