Re: 64K Tables

From: Kent Johnson (
Date: Wed Feb 05 1997 - 10:00:21 EST

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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