[mpeg-OTspec] RE: font media types
David Singer
singer at apple.com
Tue Apr 5 23:13:18 CEST 2011
On Apr 5, 2011, at 12:19 , Levantovsky, Vladimir wrote:
> David, good question but I find this approach a bit messy to deal with. My preference would be to establish a well-define set of types that cover the most common scenarios - we can always extend them (or add additional parameters, if necessary) in the future.
Then I think we need one MIME type to match the one specification/format that you have, and add the parameter later if it proves needed.
I think the questions asked ('which one should I use') indicate that trying to separate as three top-level types isn't working.
For example, if I only handle one of the two outline formats (is that even compliant), I get yes/no/maybe as an answer on whether I can handle a given file, based on its type. If I handle both, I don't need to know.
>
> Thank you,
> Vlad
>
>
>> -----Original Message-----
>> From: David Singer [mailto:singer at apple.com]
>> Sent: Tuesday, April 05, 2011 1:53 PM
>> To: Levantovsky, Vladimir
>> Cc: David Lemon; OTspec; Chris Lilley; Tab Atkins; Karsten Luecke
>> Subject: Re: [mpeg-OTspec] RE: font media types
>>
>> Just a question; would the details of the contents be better expressed
>> as an optimal paramater?
>>
>> e.g.
>>
>> application/font-off;glyphtype="ttf" to indicate that ttf kinds of
>> outlines are inside?
>>
>> On Apr 5, 2011, at 8:29 , Levantovsky, Vladimir wrote:
>>
>>> David,
>>>
>>> Thank you for your comments. The original intention was that the
>> proposed MIME media types should be assigned depending on a specific
>> type of glyph outlines data contained in a font, with font-ttf being
>> used for TrueType outlines, font-otf for CFF outlines, and font-off as
>> an umbrella type to indentify a font that either has both types of the
>> outlines or where glyph data type may be unknown to an application.
>>>
>>> If you believe this is a reasonable approach, I agree that it should
>> be clarified in more details. We can also consider changing the
>> proposed media types, e.g. to be more specific and use font-ttf, font-
>> cff and font-otf for the purposes outlined above.
>>>
>>> Other opinions / comments?
>>>
>>> Thank you,
>>> Vladimir
>>>
>>>
>>>> -----Original Message-----
>>>> From: David Lemon [mailto:lemon at adobe.com]
>>>> Sent: Monday, April 04, 2011 10:34 PM
>>>> To: Levantovsky, Vladimir; OTspec
>>>> Cc: Chris Lilley; Tab Atkins; Paul.Irish at molecular.com; Karsten
>> Luecke
>>>> Subject: [mpeg-OTspec] RE: font media types [1 Attachment]
>>>>
>>>> Valdimir et al.,
>>>> I'm unfamiliar with mime type applications, but it seems odd to me
>>>> that this does not indicate what distinctions are meant to be drawn
>>>> between the three proposed types. I'll note that the formats
>>>> referenced by their names do not clarify this; TrueType is a subset
>>>> of OpenType, which is (at least currently) equivalent to Open Font
>>>> Format.
>>>>
>>>> Perhaps another way to ask this is: How would a compliant
>> application
>>>> decide which mime type to assign?
>>>>
>>>> - thanks,
>>>> David L
>>>>
>>>>
>>>> At 10:39 -0700 4/4/11, Levantovsky, Vladimir wrote:
>>>>> Dear all,
>>>>>
>>>>> Please see attached the updated working draft of the ISO/IEC
>>>>> 14496-22/PDAM2 with additional Annex E that defines three new media
>>>>> types for fonts:
>>>>> application/font-ttf,
>>>>> application/font-otf, and
>>>>> application/font-off
>>>>>
>>>>> The document needs to be finalized before the end of the week, and
>>>>> your comments are greatly appreciated.
>>>>>
>>>>> Thank you,
>>>>> Vladimir
>>>>>
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: mpeg-OTspec at yahoogroups.com [mailto:mpeg-
>>>> OTspec at yahoogroups.com]
>>>>>> On Behalf Of Levantovsky, Vladimir
>>>>>> Sent: Wednesday, March 23, 2011 6:39 AM
>>>>>> To: OTspec
>>>>>> Subject: [mpeg-OTspec] FW: font media types
>>>>>> Importance: High
>>>>>>
>>>>>> Dear AHG,
>>>>>>
>>>>>> Please see below the email from Mr. Karsten Luecke regarding the
>>>>>> registration of the MIME types for various font formats. I brought
>>>> this
>>>>>> subject for consideration of the WG11 meeting, and we have reached
>>>> an
>>>>>> agreement that it would make perfect sense for MPEG to register
>> the
>>>>>> MIME types for OFF and other related font formats (TTF, OTF, ...)
>>>> under
>>>>>> the existing top level MIME "application" tree.
>>>>>>
>>>>>> The decision was that the AHG should move quickly to finalize the
>>>> list
>>>>>> of font formats for MIME type registration, suggest the MIME types
>>>> to
>>>>>> apply for, and prepare the text of the application to IANA. At the
>>>> same
>>>>>> time, we will have an extended two-week editing period for the
>>>> existing
>>>>>> Working Draft Amendment so that the proposed MIME types could be
>>>> added
>>>>>> in the text of the amendment before it's submitted for ballot.
>>>>>>
>>>>>> We need to proceed quickly - the text of the application including
>>>> the
>>>>>> list of font formats and their corresponding MIME types must be
>>>>>> finalized no later than April 6th.
>>>>>>
>>>>>> Thank you and regards,
>>>>>> Vladimir
>>>>>>
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Karsten Luecke [mailto:karsten.luecke at kltf.de]
>>>>>> Sent: Sunday, February 06, 2011 6:52 AM
>>>>>> Subject: font media types
>>>>>>
>>>>>> Dear Mr Levantovsky, Mr Atkins, Mr Lilley & Mr Irish,
>>>>>>
>>>>>> reading
>>>>>> http://lists.w3.org/Archives/Public/public-webfonts-
>>>>>> wg/2010Nov/0051.html
>>>>>> and googling for media types for other font formats, I came across
>>>>>>
>>>>>> WOFF
>>>>>> application/font-woff
>>>>>> according to
>>>>>> http://dev.w3.org/webfonts/WOFF/spec/#appendix-b
>>>>>>
>>>>>> http://lists.w3.org/Archives/Public/public-webfonts-
>>>>>> wg/2010Nov/0051.html
>>>>>>
>>>>>> EOT
>>>>>> application/vnd.ms-fontobject
>>>>>> which seems to be fine according to
>>>>>> http://www.iana.org/assignments/media-types/application/
>>>>>>
>>>>>> TTF OTF (OFF?)
>>>>>> application/vnd.ms-opentype
>>>>>> according to
>>>>>>
>>>>>> http://msdn.microsoft.com/en-
>>>>>> us/library/system.io.packaging.packagepart.contenttype.aspx
>>>>>> but also
>>>>>> application/octet-stream
>>>>>> according to
>>>>>> http://www.jbarker.com/blog/2009/mime-type-css-web-fonts
>>>>>> plus a not sufficiently answered request at
>>>>>> http://www.alvestrand.no/pipermail/ietf-types/2008-
>>>>>> August/002066.html
>>>>>>
>>>>>> Is there anything reliable as regards TTF OTF OFF?
>>>>>>
>>>>>> It were nice to have a single place, like the iana.org page, to
>>>> refer
>>>>>> to
>>>>>> when it comes to this.
>>>>>>
>>>>>> (The samples on the jbarker.com make me wonder if the trailing dot
>>>>>> should be included in the AddType declaration or not.)
>>>>>>
>>>>>> Best wishes!
>>>>>> Karsten
>>>>
>>>> --
>>>> David Lemon
>>>> Sr Manager, Type Development
>>>> Adobe Systems, Inc.
>>>>
>>>> 408 536 4152
>>>> lemon at adobe.com
>>>> http://blogs.adobe.com/typblography
>>>
>>>
>>> ------------------------------------
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>
>> David Singer
>> Multimedia and Software Standards, Apple Inc.
>
David Singer
Multimedia and Software Standards, Apple Inc.
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