Major Corrections to 5-level code Extension Scheme

From: jsavard@ecn.ab.ca
Date: 03/29/03 

From: jsavard@ecn.ab.ca ()
Date: Sat, 29 Mar 2003 19:49:44 GMT

After recent clarifications to my web page at

http://home.ecn.ab.ca/~jsavard/crypto/mi6133.htm

I realized that one thing that remained to be explained clearly was how to
parse the sequences of multiple shift codes that I was using in my scheme
which attempted to represent a large group of characters - even a gamut as
large as that of UNICODE - within 5-level code.

This wasn't a sort of UTF-5, however, since it wasn't based on UNICODE,
but instead required individual languages to be separately adapted to
5-level code for the maximum bandwidth efficiency.

In doing this, anyways, I found I had made some errors: I had to change
some of the sequences (but less-used ones!) (as if one can use the term
"less-used" about something that has yet to be implemented anywhere) so
that I could propose a simple and unambiguous decoding rule... also, I
found that I had left the notion of a superfluous FIGS code dangling
about.

My page, therefore, is now corrected and updated. I hope it is now
understandable enough so that, although 5-level code hardly seems like the
vehicle to employ for a large character gamut, with 8-bit codes so widely
available, that I really have proposed something which would, in the same
way that Recommendation S.2 had, allow 5-level links when required because
of bandwidth limitations to have a bit more life and versatility.

John Savard

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