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

Tue Aug 12 21:00:28 CEST 2008

Michelle,

Thank you very much for reviewing the text of the draft and providing
your comments.

My understanding is that your intention is to add an additional
explanation on the relationships between OFF language tags defined by
ISO/IEC 14496-22 and the language codes defined by ISO 639. You also
proposed an additional text to clarify the use of OFF language tags.

Since your proposal does not suggest any changes or modification to the
existing text, and the set of the existing language tags, already
defined by ISO/IEC 14496-22, remains the same - I would consider this
proposal to be an editorial comment and would like to ask AHG to review
it. Pending no objections from the AHG, I would recommend to add the
text suggested by Michelle, as its explanatory nature does not change
anything in the existing FCD draft, and provides valuable clarifications
for the users of the standard.

Thank you,
Vladimir

________________________________

	From: mpeg-OTspec at yahoogroups.com
[mailto:mpeg-OTspec at yahoogroups.com] On Behalf Of Michelle Hill
	Sent: Monday, August 11, 2008 6:10 PM
	To: Levantovsky, Vladimir; mpeg-OTspec at yahoogroups.com
	Subject: RE: [mpeg-OTspec] AHG on Open Font Format kick-off

	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
<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
<http://groups.yahoo.com/group/mpeg-OTspec/files/20080807-w10068_14496-2
2_FCD_2nd-Ed.zip>  

			Thank you and best regards,

			Vladimir

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