Pour un codage universel dans les courriels (ou ailleurs)

[Alain LaBonté <alb@xxxxxxxxxxxxxx>]

   Le test qui suit est intéressant à juste titre. Le codage UTF-8 devrait
passer partout (i.e. sans filtrage) où le mode 8 bits est activé. Cela
étant, il reste que nous sommes loin de la coupe aux lèvres en ce qui
concerne son décodage  (je reçois 5 sur 5, mais non décodé (; ). Selon
MIME, ce texte-test devrait être balisé en UTF-8 (il l'était à la source,
avec les en-têtes suivantes :

   Mime-Version: 1.0
   Content-Type: text/plain; charset=utf-8

Bon, Eudora Pro 3 ne reconnaît pas ces en-têtes mais il me les a affichées
[bien qu'il ne sache pas les reproduire quand je réachemine le courrier --
je ne sais pas si Eudora Pro 4 le fait, mais je sais qu'Outlook en est
capable, encore faut-il le lui dire !] et il n'a pas filtré les octets
(sous Eudora-Mac, avec les versions actuelles, ou sous OS/2, ce sera une
autre histoire, car tous ces octets seront filtrés et ne passeront pas
[rançon de devoir modifier tous les octets à chaque fois à cause d'un
codage non standard], ni ne seront réacheminables, c'est sûr -- ce qui est
plus ou moins grave à l'heure actuelle, puisque de toute façon, peu de
logiciels savent décoder le résultat -- mais ça viendra certainement un jour).

   Comme le mode UTF-8 peut être reconnu automatiquement de manière
relativement aisée, il y aurait sans doute lieu d'intégrer des automatismes
dans la plupart des logiciels de courrier élecronique.

Alain LaBonté
Tel Aviv

P.-S. : Une réponse suit le courrier cité (il y est d'ailleurs 
        discrètement mention du soutien actuel, d'ores et déjà,
        du latin 9 [8859-15], par un système commercial)
_____________________________________________
From: Markus Kuhn <Markus.Kuhn@xxxxxxxxxxxx>
>Reply-To: unicode@xxxxxxxxxxx
>To: Unicode List <unicode@xxxxxxxxxxx>
>Cc: welch@xxxxxxx, mutt-dev@xxxxxxxxxx
>Date: Sat, 17 Oct 1998 02:12:30 -0700 (PDT)
>Subject: Who can read UTF-8 in email today?

>
>I'd be very curious about which email software out there is already
>supporting UTF-8 encoded plain-text files and can at least display
>them correctly.
>
>If you can read a significant fraction of the following Unicode test
>characters on your email system, please let me know. I will write a list
>of UTF-8 enabled email products and post it.
>
>If you can't read them, then please try to get in touch with the
>developer of your favourite email software and try to get them
>interested in Unicode and UTF-8. Make them aware of the UTF-8 definition
>at
>
>  ftp://ftp.funet.fi/mirrors/nic.nordu.net/rfc/rfc2044.txt
>
>and the list of links to various free Unicode fonts at
>
>  http://www.cl.cam.ac.uk/~mgk25/ucs-fonts.html
>
>Hopefully Unicode/UTF-8 will soon be sufficiently commonplace in email
>software that we can start using it at least on the Unicode mailing
>list.
>
>The following list of test characters is the current repertoire of the
>ISO 10646-1 X11 fixed font available from the above URL:
>
>Basic Latin (U+0000-U+007F):
>
> !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_
>`abcdefghijklmnopqrstuvwxyz{|}~
>
>Latin-1 Supplement (U+0080-U+00FF):
>
> ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿Ã?Ã?Ã?Ã?Ã?Ã
?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?Ã?
>à áâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ
>
>Latin Extended-A (U+0100-U+017F):
>
>Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä?Ä Ä¡Ä¢Ä£Ä¤Ä
¥Ä¦Ä§Ä¨Ä©ÄªÄ«Ä¬Ä­Ä®Ä¯Ä°Ä±Ä²Ä³Ä´ÄµÄ¶Ä·Ä¸Ä¹ÄºÄ»Ä¼Ä½Ä¾Ä¿
>Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?Å?ŠšŢţŤÅ
¥Å¦Å§Å¨Å©ÅªÅ«Å¬Å­Å®Å¯Å°Å±Å²Å³Å´ÅµÅ¶Å·Å¸Å¹ÅºÅ»Å¼Å½Å¾Å¿
>
>Latin Extended-B (U+0180-U+024F):
>
>Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ?Æ Æ¡Æ¢Æ£Æ¤Æ
¥Æ¦Æ§Æ¨Æ©ÆªÆ«Æ¬Æ­Æ®Æ¯Æ°Æ±Æ²Æ³Æ´ÆµÆ¶Æ·Æ¸Æ¹ÆºÆ»Æ¼Æ½Æ¾Æ¿
>Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç?Ç Ç¡Ç¢Ç£Ç¤Ç¥Ç¦Ç§Ç
¨Ç©ÇªÇ«Ç¬Ç­Ç®Ç¯Ç°Ç±Ç²Ç³Ç´ÇµÇºÇ»Ç¼Ç½Ç¾Ç¿È?È?È?È?È?È?È?
>È?È?È?È?È?È?È?È?È?È?È?È?È?È?È?È?È?
>
>IPA Extensions (U+0250-U+02AF):
>
>É?É?É?É?É?É?É?É?É?É?É?É?É?É?É?É?É É¡É¢É£É¤É¥É¦É§É¨É©ÉªÉ«É¬É­É®É¯É°É±É²É³É´É
µÉ¶É·É¸É¹ÉºÉ»É¼É½É¾É¿Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?
>Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê?Ê Ê¡Ê¢Ê£Ê¤Ê¥Ê¦Ê§Ê¨
>
>Spacing Modifier Letters (U+02B0-U+02FF):
>
>ʰʱʲʳʴʵʶʷʸʹʺʻʼʽʾʿË?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë
?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë?Ë Ë¡Ë¢Ë£Ë¤Ë¥Ë¦Ë§Ë¨Ë©
>
>Greek (U+0370-U+03FF):
>
>ʹ͵ͺ;Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?Î?ΠΡΣΤΥΦΧÎ
¨Î©ÎªÎ«Î¬Î­Î®Î¯Î°Î±Î²Î³Î´ÎµÎ¶Î·Î¸Î¹ÎºÎ»Î¼Î½Î¾Î¿Ï?Ï?Ï?
>Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï?Ï Ï°Ï±Ï²Ï³
>
>Cyrillic (U+0400-U+04FF):
>
>Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?Ð?РСТУФХЦÐ
§Ð¨Ð©ÐªÐ«Ð¬Ð­Ð®Ð¯Ð°Ð±Ð²Ð³Ð´ÐµÐ¶Ð·Ð¸Ð¹ÐºÐ»Ð¼Ð½Ð¾Ð¿Ñ?Ñ?
>Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ?Ñ Ñ¡Ò?Ò?Ò?Ò?Ò¢Ò£Ò¤Ò
¥ÒªÒ«Ò¬Ò­Ò®Ò¯Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó?Ó Ó¡Ó¢
>Ó£Ó¤Ó¥Ó¦Ó§Ó¨Ó©ÓªÓ«Ó®Ó¯Ó°Ó±Ó²Ó³Ó´ÓµÓ¸Ó¹
>
>Armenian (U+0530-U+058F):
>
>Ô±Ô²Ô³Ô´ÔµÔ¶Ô·Ô¸Ô¹ÔºÔ»Ô¼Ô½Ô¾Ô¿Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ
?Õ?Õ?Õ?Õ?Õ?Õ?Õ?Õ¡Õ¢Õ£Õ¤Õ¥Õ¦Õ§Õ¨Õ©ÕªÕ«Õ¬Õ­Õ®Õ¯Õ°Õ±Õ²Õ³
>Õ´ÕµÕ¶Õ·Õ¸Õ¹ÕºÕ»Õ¼Õ½Õ¾Õ¿Ö?Ö?Ö?Ö?Ö?Ö?Ö?Ö?Ö?
>
>Hebrew (U+0590-U+05FF):
>
>×?×?×?×?×?×?×?×?×?×?×?×?×?×?×?×?× ×¡×¢×£×¤×¥×¦×§×¨×©×ª
>
>Georgian (U+10A0-U+10FF):
>
>á??á??á??á??á??á??á??á??á??á??á??á??á??á??á??á??á? á?¡á?¢á?£á?¤á?¥á?¦á?§á?¨
���������������
>
>Latin Extended Additional (U+1E00-U+1EFF):
>
>�������������������������
á¸?á¸?á¸?á¸?á¸?á¸?á¸?ḠḡḢḣḤḥḦḧḨḩḪḫḬḭḮḯḰḱá
¸²á¸³á¸´á¸µá¸¶á¸·á¸¸á¸¹á¸ºá¸»á¸¼á¸½á¸¾á¸¿
>á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?á¹?
á¹?á¹?á¹?á¹?á¹?á¹?á¹?ṠṡṢṣṤṥṦṧṨṩṪṫṬṭṮṯṰṱá
¹²á¹³á¹´á¹µá¹¶á¹·á¹¸á¹¹á¹ºá¹»á¹¼á¹½á¹¾á¹¿
>�������������������������
���Ỳỳ
>
>General Punctuation (U+2000-U+206F):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â? â?¡â?¢
â?£â?¤â?¥â?¦â?§â?°â?²â?³â?´â?µâ?¶â?·â?¹â?ºâ?»â?¼â?½â?¾â?¿â??â??â??â??â??â??â??
>
>Superscripts and Subscripts (U+2070-U+209F):
>
>â?°â?´â?µâ?¶â?·â?¸â?¹â?ºâ?»â?¼â?½â?¾â?¿â??â??â??â??â??â??â??â??â??â??â??â??
â??â??â??
>
>Currency Symbols (U+20A0-U+20CF):
>
>â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?«â?¬
>
>Letterlike Symbols (U+2100-U+214F):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â? â?¢â?£â?¤â?¥â?¦â?§â?ªâ?«â?®â?°â?±
������
>
>Number Forms (U+2150-U+218F):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¨â?©â?ªâ?¬â?­â?®
â?¯â?°â?±â?²â?³â?´â?µâ?¸â?¹â?ºâ?¼â?½â?¾â?¿â??â??
>
>Arrows (U+2190-U+21FF):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?ªâ?«â?¬
â?¯â?°â?±â?²â?³â?´â?µâ?¶â?·â?¸â?¹â?ºâ?»â?¼â?½â?¾â?¿â??â??â??â??â??â??â??â??â
??â??â??â??â??â??â??â??â??â??â??â??â??â??
>â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?ª
>
>Mathematical Operators (U+2200-U+22FF):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??
â??â??â??â??â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?ªâ?«â?®â?±â?´â?µâ?¶â?·â
?¸â?¹â?ºâ?»â?¼â?½â?¾â?¿â??â??â??â??â??â??
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??
â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?ªâ?«â?¬â?­â?®â?¯â?°â?±â?²â?³â?´â?µâ?¶â?·â
?¸â?¹â?ºâ?»â?¼â?½â?¾â?¿â??â??â??â??â??â??
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â? â?¡â?¢
â?£â?¤â?¥â?¦â?§â?¨â?©â?«â?²â?³â?´â?µâ?¶â?·â?¸â?¹â??â??â??â?ªâ?«â?¬â?­â?®â?¯â
?°â?±
>
>Miscellaneous Technical (U+2300-U+23FF):
>
>â??â??â??â??â??â??â??â??â? â?¡â?©â?ª
>
>Control Pictures (U+2400-U+243F):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??
â??â??â??â??â??â??â??â? â?¡â?¢â?£â?¤
>
>Optical Character Recognition (U+2440-U+245F):
>
>â??â??â??â??â??â??
>
>Box Drawing (U+2500-U+257F):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??
â??â??â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?ªâ?«â?¬â?­â?®â?¯â?°â?±â?²â?³â
?´â?µâ?¶â?·â?¸â?¹â?ºâ?»â?¼â?½â?¾â?¿â??â??
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??
â??â??â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§â?¨â?©â?ªâ?«â?¬â?­â?®â?¯â?°â?±â?²â?³â
?´â?µâ?¶â?·â?¸â?¹â?ºâ?»â?¼â?½â?¾â?¿
>
>Block Elements (U+2580-U+259F):
>
>â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??
>
>Geometric Shapes (U+25A0-U+25FF):
>
>â? â?¡â?¢â?£â?ªâ?«â?¬â?­â?®â?¯â?°â?±â?²â?³â?´â?µâ?¶â?·â?¸â?¹â?ºâ?»â?¼â?½â?¾
â?¿â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â??â
??â??â??â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¦â?§
>��������
>
>Miscellaneous Symbols (U+2600-U+26FF):
>
>â??â??â??â??â??â?ºâ?»â?¼â?¿â??â??â??â? â?¡â?¢â?£â?¤â?¥â?¦â?©â?ªâ?«â?¬â?­â?®
â?¯
>
>Dingbats (U+2700-U+27BF):
>
>â??â??â??â??â??â??â??
>
>Alphabetic Presentation Forms (U+FB00-U+FB4F):
>
>��
>
>Specials (U+FFF0-U+FFFF):
>
>�
>
>
>Markus
>
>-- 
>Markus G. Kuhn, Security Group, Computer Lab, Cambridge University, UK
>email: mkuhn at acm.org,  home page: <http://www.cl.cam.ac.uk/~mgk25/>
__________________________________________
From: Ienup Sung <ienup.sung@xxxxxxxxxxx>
>Reply-To: unicode@xxxxxxxxxxx
>To: Unicode List <unicode@xxxxxxxxxxx>
>Cc: welch@xxxxxxx, mutt-dev@xxxxxxxxxx
>Date: Sat, 17 Oct 1998 13:25:33 -0700 (PDT)
>Subject: Re: Who can read UTF-8 in email today?
>
>] Date: Sat, 17 Oct 1998 02:12:30 -0700 (PDT)
>] From: Markus Kuhn <Markus.Kuhn@xxxxxxxxxxxx>
>] Subject: Who can read UTF-8 in email today?
>] To: Unicode List <unicode@xxxxxxxxxxx>
>] Cc: welch@xxxxxxx, mutt-dev@xxxxxxxxxx
>] 
>] I'd be very curious about which email software out there is already
>] supporting UTF-8 encoded plain-text files and can at least display
>] them correctly.
>
>DtMail at Solaris 2.6 can read majority of European scripts in UTF-8
>MIME charset and additionlly it supports other European MIME charsets like
>ISO-8859-1, -2, ..., -10. This restriction on scripts is only in font, you
>can have other code points and system won't reject or alter any of such
codes.
>
>DtMail at Solaris 2.7 can read almost all characters in the email you sent
>and much more since we added CJK, Thai, Arabic, Hebrew fonts and so on.
>It supports MIME charsets like UTF-8, UTF-7, ISO-8859-1 ~ -10, ISO-8859-15,
>koi8-r, EUC-KR, eucJP, ISO-2022-JP, ISO-2022-KR, ISO-2022-CN, US-ASCII, ...
>Basically it is able to correctly encode/decode almost all major MIME
>charset'd emails and show messages correctly. The DtMail has a menu option
>that you can select which outgoing message's MIME charset you want to use
>instead of automatic default setting supplied one too.
>
>I also placed a couple of screen snapshots that shows Solaris 2.7 dtmail in
>American English Unicode locale and also Japanese Unicode locale at:
>
>	http://members.tripod.com/~ienup/dtmail1.gif	(en_US.UTF-8 dtmail)
>	http://members.tripod.com/~ienup/dtmail2.gif	(ja_JP.UTF-8 dtmail)
>
>With regards,
>
>Ienup