[mpeg-OTspec] RE: font media types [1 Attachment]

David Lemon lemon at adobe.com
Tue Apr 5 04:34:07 CEST 2011

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 

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-otf, and
>The document needs to be finalized before the end of the week, and 
>your comments are greatly appreciated.
>Thank you,
>>  -----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

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