Re: unicode-1-1-utf7

From: Deborah Goldsmith (
Date: Tue May 25 1999 - 16:02:38 EDT

> The current charset registry can be found at:
> As you can see, there is a charset called "UTF-7", defined by RFC 2152,
> which mentions Unicode 2.0. A quick scan of 2152 did not reveal whether
> UTF-7 always refers to the most recent version of Unicode (whereas UTF-8
> is defined that way).
> So if the message is not based on the Unicode 1.1 encoding (where Korean
> characters were in a different block), I'd say you can just use "UTF-7".
> However, the recipient(s) may not be using software that can interpret
> such messages.

From RFC 2152 (note the final sentence):

> Use of Character Set UTF-7 Within MIME
> Character set UTF-7 is safe for mail transmission and therefore may
> be used with any content transfer encoding in MIME (except where line
> length and line break restrictions are violated). Specifically, the 7
> bit encoding for bodies and the Q encoding for headers are both
> acceptable. The MIME character set tag is UTF-7. This signifies any
> version of Unicode equal to or greater than 2.0.

Deborah Goldsmith
Manager, International Toolbox Group
Apple Computer, Inc.

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