From: Philippe Verdy (email@example.com)
Date: Thu May 15 2003 - 13:56:44 EDT
From: "Otto Stolz" <Otto.Stolz@uni-konstanz.de>
> Ben Dougall wrote:
> > <guess> that area is full of surrogates. so they need another code point
> > to make up a single character. on their own 0xd800-0xdfff are 1/2
> > characters :) </guess>
> Oh, no! Again, you are confusing code-points and code-units
> (in other words: Unicode and its UTFs).
> In a nutshell: Unicode is not UTF-16.
Or in other words, Unicode defines *code points* only, not code units (this is left to specific encodings used to serialize it, including UTF-*, and "compressed" BOCU and CESU encodings, which can all be computed algorithmically from Unicode code points).
Note that some UTF-* encodings are now described by Unicode.org as standards, but is technically an annex to the standard, and not necessary to its definition.
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