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<pre><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I think that if we want to introduce breaking changes we need to build the foundation for future discussions and consensus. Adam summed it up nicely in his previous email: </span><span style="color:black">explicit discussion, agreement, and also a benefit-cost analysis.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> (<a href="https://lists.aau.at/pipermail/mpeg-otspec/2020-September/002263.html">https://lists.aau.at/pipermail/mpeg-otspec/2020-September/002263.html</a>)<o:p></o:p></span></pre>
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<pre><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Vlad<o:p></o:p></span></pre>
<pre><span style="color:black"><o:p> </o:p></span></pre>
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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"> Dave Crossland <dcrossland@google.com>
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<b>Sent:</b> Friday, September 11, 2020 4:58 PM<br>
<b>To:</b> Levantovsky, Vladimir <Vladimir.Levantovsky@monotype.com><br>
<b>Cc:</b> Renzhi Li <Renzhi.Li@microsoft.com>; mpeg-otspec <mpeg-otspec@lists.aau.at><br>
<b>Subject:</b> Re: Introducing breaking changes into the spec (was: RE: [MPEG-OTSPEC] [EXTERNAL] Proposal to deprecate derived search values)<o:p></o:p></span></p>
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<p class="MsoNormal">On Fri, Sep 11, 2020 at 4:12 PM Levantovsky, Vladimir <<a href="mailto:Vladimir.Levantovsky@monotype.com">Vladimir.Levantovsky@monotype.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I did NOT say they can’t happen here, but this is exactly the kind of decision that cannot be taken
lightly, and it is definitely not a joke!</span><o:p></o:p></p>
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<p class="MsoNormal">Thanks for clarifying - so you are saying, comments made about 1.X vs. 2.0 _are_ helpful and welcome here, but not "in passing"? If yes, how to formalize such discussions? :)<o:p></o:p></p>
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<p class="MsoNormal">On Github, we can have issues assigned to Milestones so its very clear what context they are in: <o:p></o:p></p>
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<p class="MsoNormal">1. Current Spec Changes (Editorial - no differences for implementations, "OT 1.8.x)<o:p></o:p></p>
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<p class="MsoNormal">1. Iterative Spec Changes (Small to medium work required by implementations to meet the standard, "OT 1.9.x")<o:p></o:p></p>
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<p class="MsoNormal">3. Incompatible Spec Changes (Large impact for implementations, "OT 2.0")<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">New specs can be written easily, but it’s the wide adoption [not the spec itself] that we should care
about the most because, in the end, it is what benefits users. You seem to care a lot about consensus decisions, and this is exactly why consensus decisions are so important.</span><o:p></o:p></p>
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<p class="MsoNormal">Harfbuzz is now adopted widely (Google, Adobe, MS...) and anyone can fork and implement anything and submit it mainly harfbuzz. <o:p></o:p></p>
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