[mpeg-OTspec] AHG on Open Font Format kick-off

Tue Aug 12 00:09:40 CEST 2008

Thank you Vladimir. We reviewed the text of the draft and would like to point out that there is no explanation on the relationship between the OFF language tags and the language codes defined in the ISO 639. We believe that the intended use of "Language Tags" ( in subclause 5.4.2) is unclear and the text would benefit if additional clarification is provided. We would like to suggest the add the new column in the table, identifying ISO language codes for each OFF language tag. In addition, we recommend to add the following text explaining the use of language system tags:

Language system tags identify the language systems supported in a OpenType Layout font. What is meant by a "language system" in this context is a set of typographic conventions for how text in a given script should be presented. Such conventions may be associated with particular languages, with particular genres of usage, with different publications, and other such factors. For example, particular glyph variants for certain characters may be required for particular languages, or for phonetic transcription or mathematical notation.

In principle, a given set of conventions may be shared across multiple scenarios. For instance, two different languages (perhaps unrelated) may happen to follow the same conventions. Language system tags can be registered on a perceived-need basis, however; as a result, there is no guarantee that each tag represents a distinct and unique set of conventions. Tags can, however, be registered with the intent of representing conventions that apply to multiple languages. In such cases, the documented description for the tag should reflect that intent.
It should also be noted that there may be more than one set of typographic conventions that apply to a given language.

Therefore, in several respects, language system tags do not correspond in a one-to-one manner with languages. Even so, many registered tags are intended to represent typographic conventions for a particular language. For cases in which a correlation exists between a tag and one or more languages, the language identities are documented here by reference to ISO 639-2 and ISO 639-3.*

If information is available to an application declaring the language of text content, then the application may make use of that to select a default language system tag to be applied when displaying that text. It is preferable, however, to give users control over the choice of language system tag to be used. (Depending on the application scenario, such control may be given to content authors, to content readers, or to both.)

*ISO 639-2 provides identifiers for individual languages as well as for certain collections of languages. ISO 639-3 provides identifiers for a far more comprehensive set of individual languages, though not for collections. Entities in ISO 639 that are referenced here may include any of the individual languages covered in ISO 639-2 or ISO 639-3, or to any of the collections covered in ISO 639-2.

Thank you,
Michelle Hill

From: mpeg-OTspec at yahoogroups.com [mailto:mpeg-OTspec at yahoogroups.com] On Behalf Of Levantovsky, Vladimir
Sent: Monday, August 11, 2008 2:11 PM
To: Thomas Phinney; mpeg-OTspec at yahoogroups.com
Subject: RE: [mpeg-OTspec] AHG on Open Font Format kick-off

Okay. Actually, I believe that shifting the start time to 1:00pm would benefit our colleagues from Japan giving them a choice to join in the discussion early morning Japan local time. Assuming there are no objections from the intended participants of this AHG meeting - we will change the start time of the call to 1:00 pm PDT (20:00 UTC). The expected duration of the call will be four hours, the detailed agenda will be announced prior to the call.

Thank you,
Vladimir

________________________________
From: Thomas Phinney [mailto:tphinney at adobe.com]
Sent: Monday, August 11, 2008 5:02 PM
To: Levantovsky, Vladimir; mpeg-OTspec at yahoogroups.com
Subject: RE: [mpeg-OTspec] AHG on Open Font Format kick-off
Actually, in discussing this with Apple, I believe we agreed on a 1 pm (PST) start time, which is four hours later (18:00 UTC). I believe we were thinking a half day would be enough.

Regards,

T

From: mpeg-OTspec at yahoogroups.com [mailto:mpeg-OTspec at yahoogroups.com] On Behalf Of Levantovsky, Vladimir
Sent: Monday, August 11, 2008 8:51 AM
To: mpeg-OTspec at yahoogroups.com
Subject: RE: [mpeg-OTspec] AHG on Open Font Format kick-off

Dear all,

As a follow up to my previous announcement, please find below the conference bridge dial-in information for our AHG teleconference meeting:

Access numbers:
USA: 866-617-3597 or 210-795-0625
UK:   0800-279-9632 or +44-20-7108-6391
France: 080-510-0984 or +33-1-7070-8456
Italy:0800-906-465 or +39-02-3604-7040
Japan: 0034-800-400652 or +81-3-5539-5161
(if any participant will join this call from the country not listed above - please email me and I will provide you with additional country-specific dial-in information).

Participant passcode: 3148166#

The conference call is suggested to be held on Monday, September 8th, 2008 at 16:00 UTC, for correct local times please refer this link:
http://www.timeanddate.com/worldclock/fixedtime.html?month=9&day=8&year=2008&hour=9&min=0&sec=0&p1=283
Having our conference call on September 8 will provide us enough time to review the current draft of the specification and to accommodate your suggestions and corrections (if any) to meet the FCD submission deadline on September 12, 2008. Please let me know as soon as possible if this date and/or time may not work for you.

For those of you who would like to meet face to face at this AHG meeting - Apple has kindly agreed to host AHG members at their Cupertino campus in California. Further details about the location will be announced shortly.

With kind regards,
Vladimir

________________________________
From: mpeg-OTspec at yahoogroups.com [mailto:mpeg-OTspec at yahoogroups.com] On Behalf Of Levantovsky, Vladimir
Sent: Friday, August 08, 2008 3:55 PM
To: mpeg-OTspec at yahoogroups.com
Subject: [mpeg-OTspec] AHG on Open Font Format kick-off
Dear all,

I just uploaded the draft text of FCD of the ISO/IEC 14496-22 (2nd edition) "Open Font Format" specification, and would like to announce the official kick-off of the AHG OFF. The AHG will remain active until 87th meeting of SC29/WG11 in January 2009.

The AHG mandate is as follows:

 1.  To review the new features and corrections proposed in the ballot comments and make sure that the proposed changes made in the text of the 2nd edition of ISO/EC 14496-22/FCD can be implemented without an adverse effect on backward compatibility.
 2.  To review the text of ISO/IEC 14496-22/FCD (2nd edition), make sure that all the new functionality is properly documented, and to provide recommendations if new changes in the text and any additional clarifications are necessary.
I would like to ask you to review the draft text and to provide your comments you find that changes ("Track Changes" is on) made in the text of the specification may in any way affect existing fonts and/or font rendering and text layout implementations. Any suggestions that are editorial in nature and would improve the readability and clarity of the specification are welcome and very much appreciated.

Technical comments (if any) can be discussed on the email reflector; however, I would like to propose to have a conference call on September 8 to discuss all changes and proposed clarifications (Please note - the deadline for submission of this document is September 12, 2008). I will send you the detailed conference call information in a separate email.

The draft can be accessed using the following link:

http://groups.yahoo.com/group/mpeg-OTspec/files/20080807-w10068_14496-22_FCD_2nd-Ed.zip

Thank you and best regards,
Vladimir

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