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   Re: UTF-8 vs UTF-16...? (Was: Feeling good about SML)

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  • From: Steinar Bang <sb@metis.no>
  • To: xml-dev@ic.ac.uk
  • Date: 17 Nov 1999 13:24:27 +0100

>>>>> "James Tauber" <jtauber@jtauber.com>:

> UTF-8 and UTF-16 are transformations formats of ISO10646, not
> Unicode.

Aren't Unicode and ISO 10646 pretty much one and the same these days?
At least that's how I read:
        <URL:http://www.unicode.org/unicode/faq/#Unicode and ISO 10646>

> UTF-8 gives access to all 2^31 characters from the UCS repertoire.

> UTF-16, however, only gives access to the equivalent of Unicode with the
> surrogate extension mechanism, ie the first 17 planes of the UCS.

Not sure if I understand the UTF-16 bit above, but I'm reading this:
        <URL:http://www.unicode.org/unicode/faq/#UTF-16 and UCS-4>
to UTF-16 being able to represent the full UCS-4, which is what you
say UTF-8 can do, if I interpret you correctly...?

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