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

[Levantovsky, Vladimir]

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