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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thank you Liang and Simon for starting the discussion!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Since we are going to embark on the exploration activity to determine the scope of this future work, it is extremely important to identify what relevant information
is currently missing [that affects interoperability of fonts and implementations] and if it needs to be specified as a formal standard. It is also important to determine who currently possesses the relevant knowledge and experience, and is willing to contribute
to this important work. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I also agree with you that it is very valuable to identify all related documentation, but we also need to be aware of its current status (public / opensource
/ proprietary / copyrights, etc.) Knowing what we have as a starting point (such as e.g. USE document:
</span><a href="https://docs.microsoft.com/en-us/typography/script-development/use">https://docs.microsoft.com/en-us/typography/script-development/use</a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> and all other resources
Liang has mentioned) and whether any existing / prior documentation could be contributed for us to use will not only give us a head start, but also helps come quickly to a decision on whether we need to consider publishing formal script-specific text layout
specifications, or if it may be more appropriate to publish it as OFF/OpenType implementation guidelines, or both.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">All these components – the information about what we have to start with, who can contribute to this development [and whether they are willing to do so], and what
we believe the outcome of this work should be – will help us greatly to decide what organization (Unicode Consortium and this ISO WG were initially named for consideration) would be best suitable to be selected as the venue for this future work.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Vladimir<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> mpeg-otspec <mpeg-otspec-bounces@lists.aau.at>
<b>On Behalf Of </b>?? Liang Hai<br>
<b>Sent:</b> Wednesday, July 29, 2020 10:35 AM<br>
<b>To:</b> mpeg-otspec@lists.aau.at<br>
<b>Subject:</b> [MPEG-OTSPEC] Defining the text shaping working group’s scope<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">(If this topic confuses you, see the appended background introduction.)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">In order to figure out the scope we care about, how about we start with maintaining a list of existing projects that are intended to complement the OT spec (and its semi-standard specs
such as the USE spec)?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">In terms of my personal concerns, one of the most important projects today is this documentation by Nate Willis, et al, which is focused on documenting how OTL should actually be implemented
for each complex script, so developers can actually implement compatible shapers:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:"SFProText-Regular",serif">Documentation of OpenType shaping behavior</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><a href="https://protect-us.mimecast.com/s/QFjcClYmL2U2KB9mIGIQRV">https://github.com/n8willis/opentype-shaping-documents</a></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">On the other hand, my main personal interest is about clarifying how Unicode encoded complex scripts (especially the Indic ones) should be implemented with OTL fonts. (Note the difference
from Nate’s project, which is about how to shape texts using these fonts.)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">I believe we need to document a reference interface between orthographical correctness and typographical concerns. The whole process from Unicode text up to this interface can be vetted
by experts (especially for compatibility and reasonable fallback behavior) and automated by tooling, while font producers are left with a straightforward glyph set to fill. This will greatly improve reliability of complex scripts’ fonts, and also remove the
unreasonable obstacle that prevents native users to implement their own scripts in fonts. Some knowledge collected during this effort should even be incorporated into the Unicode Standard, if it’s relevant and the community can achieve an agreement on it.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">The current early draft is still very sketchy, but I expect to significantly update it and transform it into a tutorial-based document (because concrete instructions will be much easier
to read) in a couple of months:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:"SFProText-Regular",serif">Indic text shaping for type designers</span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><a href="https://protect-us.mimecast.com/s/_XWACmZn6YIjYm08HOyLHI">https://github.com/typotheque/text-shaping</a></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"SF Pro Text",serif"><br>
Best,<br>
</span><span style="font-family:"MS Gothic"">梁海</span><span style="font-family:"SF Pro Text",serif"> Liang Hai<br>
<a href="https://protect-us.mimecast.com/s/UOpPCn5oXgs7LJygUNFAcv">https://lianghai.github.io</a></span><span style="font-family:"SFProText-Regular",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">---<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">Some context for subscribers of this mailing list who didn’t participate in yesterday’s meeting:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">There’s a collective effort to seek a clear path forward for improving the whole text shaping industry (including the font formats)’s situation. Yesterday there was the first meeting,
and the next meeting (open to all) is scheduled for four weeks later (25 Aug, 13:30–14:50 UTC-4). The following document contains yesterday’s meeting notes:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">Text Shaping Working Group (working title)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><a href="https://protect-us.mimecast.com/s/813pCo20KjhrG7o5c6dpOk">https://docs.google.com/document/d/1KoknOb0IMAPeiLhifvc_AqB7s3rs6VKOsTQg_oCDypQ/edit?usp=sharing</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"SFProText-Regular",serif">By the end of the meeting we decided this list could be a temporary home for our discussions because of the significant overlap of interest. I hope we’re
<i>not</i> spamming you guys.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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