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Doug Ewell wrote:
> Markus Scherer <markus.scherer@jtcsv.com> wrote:
> > In UTF-7, byte sequences overlap and many bytes in the encoding
> > (2 out of 8 I think) contain pieces of two adjacent code units.
> > This is more like in Huffman codes.
>
> This is one reason why I'm a little uncomfortable with the wording in
> UTR #17, which specifically mentions SCSU as a Transfer Encoding Syntax
> (in contrast to a Character Encoding Scheme) but does not mention UTF-7,
> which to my mind fits the definition of a TES much better.
Neither SCSU nor UTF-7 are TES's; they are both CES's (and are even
registered as IANA charsets, to prove the point).
There is of course nothing in the definition of a CES/charset (in the IETF
or W3C or UTR#17 models) that requires it to be stateless, or that requires
encodings of code points not to "overlap".
- --
David Hopwood <david.hopwood@zetnet.co.uk>
Home page & PGP public key: http://www.users.zetnet.co.uk/hopwood/
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Nothing in this message is intended to be legally binding. If I revoke a
public key but refuse to specify why, it is because the private key has been
seized under the Regulation of Investigatory Powers Act; see www.fipr.org/rip
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This archive was generated by hypermail 2.1.2 : Fri Apr 12 2002 - 01:48:34 EDT