Re: Unicode 3.1: IDS and ZW(N)J

From: John Jenkins (
Date: Wed Jan 24 2001 - 13:16:22 EST

On Wednesday, January 24, 2001, at 06:42 AM, John Cowan wrote:

> Therefore, it would be useful to allow ZW(N)J in IDSes in order
> to encourage or inhibit this ligaturing behavior. Adding
> a rule

I'm going to disagree here. I've long maintained that ligature control
doesn't belong in plain text, and so I'm decidedly prejudiced, but in
any event the basic stance we've taken in the past has consistently been
that there is no expectation that IDSs will *ever* be rendered as single
glyphs. Even allowing that smart font technology might make it possible
to render them with single glyphs, I think they should be processed in
the same fashion as (say) combining character sequences. We don't allow
for a joiner between an e and an acute accent. If the system can render
that CSS as a single glyph, then it can and that's as much as need be

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