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<div class="moz-cite-prefix">On 21082020 1:52 pm, Peter Constable
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:MWHPR1301MB211231EDF16C1D2D60F02BBD865B0@MWHPR1301MB2112.namprd13.prod.outlook.com"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Thirdly,
if there is one shaping engine for all scripts, would there be
any need at all for LangSys and Feature tables to still be
organized hierarchically under different script tags? (That’s
another existing obstacle to glyph actions across script-run
boundaries.) IOW, instead of a new _<i>set</i>_ of script tags,
would just _<i>one</i>_ new “script” tag suffice? </span></blockquote>
<p>That’s where my mind started going today. But I'm not sure all
the issues that arise can be resolved in that model.<br>
</p>
<p>If itemisation and glyph run segmentation is not performed on the
basis of script tag, and everything using the new USE tag gets
processed as a single run, how do we handle characters with locl
substitution forms specific to individual scripts? And if such
characters are Unicode script=common, are we pushing the
segmentation down a level rather than removing it?<br>
</p>
<p>J.<br>
</p>
<pre class="moz-signature" cols="72">--
John Hudson
Tiro Typeworks Ltd <a class="moz-txt-link-abbreviated" href="http://www.tiro.com">www.tiro.com</a>
Salish Sea, BC <a class="moz-txt-link-abbreviated" href="mailto:tiro@tiro.com">tiro@tiro.com</a>
NOTE: In the interests of productivity, I am currently
dealing with email on only two days per week, usually
Monday and Thursday unless this schedule is disrupted
by travel. If you need to contact me urgently, please
use some other method of communication. Thank you.</pre>
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