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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Vlad:<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">>
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The issues you outlined in your email are exactly the problems that we are trying to solve…<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 identified some possible reasons for having data describing combinations of font resources, but also indicated that I wasn’t aware of any problems regarding
interoperable interchange of such data needing to be solved, other than the mention of CSS styles, and there already is a different solution for that problem. Thus, in saying we are trying to solve exactly the problems I outlined, I think I might have been
misunderstood since I was saying it wasn’t clear to me what problems there are needing to be solved.<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 haven’t read the docs you refer to, however, so perhaps they clarify that.<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>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Peter</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Levantovsky, Vladimir [mailto:Vladimir.Levantovsky@MonotypeImaging.com]
<br>
<b>Sent:</b> Thursday, November 18, 2010 8:19 AM<br>
<b>To:</b> Peter Constable; mpeg-OTspec@yahoogroups.com<br>
<b>Subject:</b> RE: AHG kick-off - Composite Font Representation work<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Peter,<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 for your message and for your interest in the development of the a Composite Font representation.<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">This work started back in early 2009 (<a href="http://tech.groups.yahoo.com/group/mpeg-OTspec/message/96">http://tech.groups.yahoo.com/group/mpeg-OTspec/message/96</a>)
as an exploration activity based on the proposal from Microsoft and other members – you may find all the related discussions in the AHG email archive. There are also intermediate documents that AHG produced and discussed during the course of the exploration
activity, and the draft descriptions of the requirements and use cases that were considered. The documents are available from the AHG File storage:
<a href="http://tech.groups.yahoo.com/group/mpeg-OTspec/files/">http://tech.groups.yahoo.com/group/mpeg-OTspec/files/</a>.<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">The issues you outlined in your email are exactly the problems that we are trying to solve, and I believe this was clearly documented in the Requirements document.
The Call for Proposals was closed at the last SC29/WG11 meeting in October, and the Working Draft is now being prepared. I welcome your feedback and contributions to this work, we are in the very beginning of the development process and the input from the
members of the group would be valuable to ensure the quality of work and the resulting standard.<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 will let the original proposers answer the specific questions regarding some of the proposed elements and attributes, and the specific examples.<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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<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Peter Constable [mailto:petercon@microsoft.com]
<br>
<b>Sent:</b> Thursday, November 18, 2010 4:10 AM<br>
<b>To:</b> Levantovsky, Vladimir; mpeg-OTspec@yahoogroups.com<br>
<b>Subject:</b> RE: AHG kick-off - Composite Font Representation work<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I admit I haven’t been involved in discussions regarding a composite font format over the past couple of years, so perhaps I’m asking for something that has
been clear to others:<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 would find it helpful to see a clear statement of the specific problem that this proposal is trying to solve.<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">Standardizing a file format is useful for data interchange between different users and different products. I don’t see what scenarios would require interchange
of data describing a combining of font resources in the abstract. <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">Font resources may need to be combined for use together in relation to text styling in particular text-layout applications. So, for example, the CSS Font Module
has provisions for describing font styling that combines multiple font resources in ways that are applicable to use in styles used in an HTML environment. The data being interchanged, in that case, is intrinsically related to the application to CSS and HTML
and to the particular HTML content for which it was intended. This is one possible application scenario for such a data format, but I’m not aware of any application or operational environment in which the proposed standard would be used.<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">A rather different problem that a description for combining font resources might apply to is addressing the conflict between the large repertoire of Han ideographic
characters encoded in Unicode / ISO 10646 on the one hand and the 64K glyph limit inherent in the OpenType format on the other. In a text layout system, there could potentially be benefits to describing a relationship between two font resources that have glyphs
for Han ideographs and that exist as distinct resource only because of the 64K limitation. But it’s not clear if there’s a _<i>data</i>
<i>interchange</i>_ need in this regard. <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 don’t know if either of these possible issues are what this proposal is intended to solve. Whether it is these or something else, the intended implementation
environments or actual need in interchange are also not clear to me. I’m also unclear regarding provisions of the format in the proposed working draft. For instance, the last example includes this snippet:<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"><cmapOverride><o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><map charValue="0x0020" charName="SPACE" glyphRefID="231"/><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> <map charValue="0x0021" charName="EXCLAMATION MARK" glyphRefID="232"/><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> <map charValue="0x0022" charName="QUOTATION MARK" glyphRefID="12087"/><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>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It’s completely unclear how character names in this context could be anything but superfluous information or, worse, information that is potentially in conflict
with other standards (if, for instance, the first map associated charValue=”0x0020” with charName=”EXCLAMATION MARK”).<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’m sure there are reasonable responses that can be provided to some or all of my questions. If not, though, or if there isn’t clear consensus on what particular
problems are being solved and why these are problems that entail data interchange, I think it would be good to get some clarification and consensus on those points. A key to writing a good specification is understanding what problems are needing to be solved
and what important principles should be applied to ensure that the “solution” is successful.<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>
<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">Peter Constable<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> mpeg-OTspec@yahoogroups.com [mailto:mpeg-OTspec@yahoogroups.com]
<b>On Behalf Of </b>Levantovsky, Vladimir<br>
<b>Sent:</b> Tuesday, October 26, 2010 10:27 AM<br>
<b>To:</b> mpeg-OTspec@yahoogroups.com<br>
<b>Subject:</b> [mpeg-OTspec] AHG kick-off - Composite Font Representation work<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dear all,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The purpose of this email is to kick off the activity of the ad-hoc group and to update you on the results of the last MPEG meeting. As you know, we had a Call for Proposals issued
for Composite Font standard, and two proposals were submitted for consideration by the MPEG Committee at the last meeting on October 10-15. Both proposals (one from Apple inc. based on the Apple Spliced Font Format, and the joint proposal from Apple and Adobe
with Spliced Font Format extensions) were accepted, and the Working Draft of the future standard was prepared. One of the requirements of the Call for Proposals was to provide the full description of the proposed technology – this requirement was partially
satisfied by the proposal submissions; however, the original proposers have agreed to provide the needed additional information if the proposals are accepted.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The mandate of this AHG is to finalize the Working Draft of the Composite Font Representation document before the next MPEG meeting in January 2011. I uploaded the working draft
to the AHG file repository, and the document can be downloaded using the following URL:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="http://groups.yahoo.com/group/mpeg-OTspec/files/w11572_14496-28_WD-CFS.doc">http://groups.yahoo.com/group/mpeg-OTspec/files/w11572_14496-28_WD-CFS.doc</a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I would like to ask all group members and the original contributors of the proposed technical solutions to review the prepared Working Draft and to provide the missing details.
If necessary, the conference call can be scheduled to discuss the technical and editorial work items.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thank you and best regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Vladimir<o:p></o:p></p>
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