Re: 64K Tables

From: Asmus Freytag (
Date: Thu Feb 06 1997 - 16:49:38 EST


Proceedings of the International Unicode Conferences going
back several years are available from the Unicode HQ.
Please contact by e-mail or call
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Asmus Freytag
VP Marketing
The Unicode Cosortium

At 08:12 AM 2/5/97 -0800, you wrote:
>Ken Whistler wrote:
>> Keld commented (re use of ISO 14651 tables making for a non-small grep):
>> > ISO 14651 does not require ISO 10646, but can also be used in
>> > a ISO 8859-1 or other 8-bit environment, without need for 64 k
>> > tables.
>> To clarify the "64K table" concept (which is still widely cited
>> as a barrier to implementation, as above) note that
>> tables to support the full Unicode set for conversion, for character
>> properties, for collation, or whatever, are *never* 64K tables if
>> properly implemented.
>> One actual example: I have implemented a table which stores 41
>> distinct properties for all Unicode characters in Unicode 2.0,
>> including all the bidi properties. That table comprises 28,954 bytes.
>> Special-purpose tables which don't attempt to do so much can be
>> done in much less space, depending on their purposes.
>> There are a number of papers published in the proceedings of the
>> various International Unicode Conferences which discuss easy-to-
>> implement algorithms for compact tables appropriate for Unicode usage.
>Can you please give specific references? I am very interested in these
>algorithms but I don't have any of the proceedings. Are any of the papers
>available on-line?
>Is there any chance you could make code available?
>Kent Johnson Transparent Language, Inc.

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