You say that a Unicode code point can be represented by %xABCD but that is not spelt out in ABNF [RFC4234]. And when it refers to 'one printable character' as '%x20-7E' I get the impressions that coded character sets like Unicode, with more than 256 code points, do not fall within its remit. I have yet to see any use of this in an I-D or RFC. I did post a question about this to this list on 24th December and the lack of response reinforces my view that this is uncharted territory. Tom Petch ----- Original Message ----- From: "James Seng" <james@xxxxxxx> To: "Tom.Petch" <sisyphus@xxxxxxxxxxxxxx> Cc: "ietf" <ietf@xxxxxxxx> Sent: Wednesday, January 04, 2006 6:50 AM Subject: Re: Troubles with UTF-8 > On 12/23/05, Tom.Petch <sisyphus@xxxxxxxxxxxxxx> wrote: > > > > A) Character set. UTF-8 implicitly specifies the use of Unicode/IS10646 > > which > > contains 97,000 - and rising - characters. Some (proposed) standards > > limit > > themselves to 0000..007F, which is not at all international, others to > > 0000-00FF, essentially Latin-1, which suits many Western languages but is > > not > > truly international. Is 97,000 really appropriate or should there be a > > defined > > subset? > > > Why should there be a subset? You really really dont want to go into a > debate of which script is more important then the other. > > B) Code point. Many standards are defined in ABNF [RFC4234] which allows > > code > > points to be specified as, eg, %b00010011 %d13 or %x0D none of which are > > terribly Unicode-like (U+000D). The result is standards that use one > > notation > > in the ABNF and a different one in the body of the document; should ABNF > > allow > > something closer to Unicode (as XML has done with �D;)? > > > Following RFC4234, Unicode code point U+ABCD will just be represented as > %xABCD. > > I do not see the problem you mention or am I missing something? > > <snip> > http://www.unicode.org/charts/ > > -James Seng > _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf