Re: diakritika apod.

From: Jiri Kvarda <kvarda@VC.CVUT.CZ>
Subject: Re: diakritika apod.
Date: Mon, 8 Jan 1996 08:05:06 +0100

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At 13:26 6.1.1996 EST, you wrote:
>A v teto situaci bychom meli respektovat doporuceni RFC, ktere
>jednoznacne pouziva pro MIME ISO8859-2 (viz napr. dokument RFC1521).

Ono to neni az tak jednoznacne. RFC1521 rika:
   An initial list of predefined character set names can be found at the
   end of this section.  Additional character sets may be registered
   with IANA, although the standardization of their use requires the
   usual IESG [RFC-1340] review and approval.  Note that if the
   specified character set includes 8-bit data, a Content-Transfer-
   Encoding header field and a corresponding encoding on the data are
   required in order to transmit the body via some mail transfer
   protocols, such as SMTP.

A upresnuje to RFC1522, takze je napr. mozne posilat mail v UNICODE.
Take aliasu pro jednotlive charsety registrovanych IANA je vice, takze
napr. charset=iso-ir-101 znamena take ISO-8859-2.
Jina otazka je urcita dohoda co pouzivat prednostne v ramci Ceske
republiky a co umi vetsina maileru.

If the body
   contains data in any bit-width other than 7-bit, the appropriate
   bit-width Content-Transfer-Encoding token must be used (e.g., "8bit"
   for unencoded 8 bit wide data).
BTW, ani Vas mailovy program nepodporuje MIME tak jak ma. Vas mail
obsahuje hlavicky
  Mime-Version:  1.0
  Content-Type: text/plain; charset=ISO-8859-2
ale chybi v nem

  Content-Transfer-Encoding: 8bit
a pritom obsahuje non-ASCII znaky.

RFC1521 k tomu rika:
   ... The Content-Transfer-Encoding field
   is used to indicate the type of transformation that has been used in
   order to represent the body in an acceptable manner for transport.

   encoding := "Content-Transfer-Encoding" ":" mechanism

   mechanism :=     "7bit"  ;  case-insensitive
                  / "quoted-printable"
                  / "base64"
                  / "8bit"
                  / "binary"
                  / x-token

       "8bit" means that the lines are short, but there may be
            non-ASCII characters (octets with the high-order
            bit set).

   ... If the body
   contains data in any bit-width other than 7-bit, the appropriate
   bit-width Content-Transfer-Encoding token must be used (e.g., "8bit"
                                             ^^^^^^^^^^^^
   for unencoded 8 bit wide data).

S pozdravem,

Jiri Kvarda                       Ceske Vysoke Uceni Technicke
e-mail: kvarda@vc.cvut.cz         Vypocetni centrum, ICSC
tel.: +42 2 2435 3306             Praha, Cesko

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