Re: New Ideographs in Unicode 3.0 and Beyond

Date: Wed Sep 08 1999 - 15:50:04 EDT

I am interested in some of these issues although I am not an expert in these
I am especially interested in them if some of the answers (especially for point
7) are _not_ going to be:

suggested partial answers:

5) there will be a graphic or textual distinction
6) should be fixed
7) "characters" will be replaced by saying "abstract characters":
   otherwise, implementations based on UTF-8 or UTF-32
   would have trouble counting these 16 characters


PS: I was there for the talk.

Markus Scherer IBM Cupertino, CA

John Cowan <> on 99-09-08 12:00:11

To: Unicode List <>
Subject: New Ideographs in Unicode 3.0 and Beyond

I have read John Jenkins's paper with the above title with
great interest, and I have a few questions:

1) Was there a Unified Repertoire and Ordering 1.0? How did it
differ from the URO 2.0 we have today?

2) Is it correct to say that the characters in Extension A
belong to source character sets which were not considered in
constructing the URO 2.0?

4) Nit: the "y" in "ye" is a substitute for thorn, not eth.

5) The glyph shown for the Ideographic Variation Indicator
is shown with an enclosing dotted rectangle. In Unicode 2.0, such
glyphs appearing in the character tables were pseudo-glyphs
for characters not to be rendered. How does Unicode 3.0
make clear which dotted-rectangle glyphs are, and which are not,

6) The BNF grammar on page 14 implies that a single ideograph by itself
is an IDS: surely this is not correct. If this grammar appears
in any authoritative text, there's a problem!

7) Page 17 says that IDSes cannot exceed 16 characters.
Does this refer to Unicode abstract characters (= ISO 10646
characters), which may be 16-bit or a 32-bit surrogate pair,
or to 16-bit codes? The Unicode Standard 2.0
regrettably uses "character" in multiple senses.
(This too may need clarification in some standard.)

John Cowan                         
       I am a member of a civilization. --David Brin

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