Word_Break for Hieroglyphs

[Richard Wordingham via Unicode]

On Thu, 14 Dec 2017 18:11:33 +0000
Andrew Glass via Unicode <unicode at unicode.org> wrote:

> We had some discussion on the sidelines of
> the August UTC meeting at which time it became clear that more work
> is needed as current property values are not entirely correct.
> Currently, my Hieroglyphic energies are focused on completing font
> documentation and a reference font. I think it will be most helpful
> to understand the properties when we have a font that fully supports
> the quadrat controls so we have specific examples we can look at and
> confer on with specialists. So I’m happy to take Ken’s suggestion
> that we don’t rush in here.

I'll read that as saying there is no need to report a problem; that we
already know that there will be a problem with real text of more than a
few characters.  (The current encoding was justified as
primarily defining short strings marshalled by a layout language.) 

I was approaching hieroglyphs as a system where grapheme cluster
breaks, line break opportunities and sentence boundaries have little
connection, unlike the hierarchy seen in most writing systems.  At
least, quadrats seem to be strong candidates for the status of graphme
clusters.

Richard.