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July 2008
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2008.07.10 23:25 "Re: eta for bigtiff support?", by Chris Cox
If you continue to use the .tif/.tiff extension - then the MIME type should also remain the same. Chris On 7/10/08 4:17 PM, "Bob Friesenhahn" <bfriesen@simple.dallas.tx.us> wrote: > On Thu, 10 Jul 2008, Gary McGath wrote: >> There's still the open issue of the MIME type, which was discussed a while >> back and then dropped. As I read IETF RFC 3302 >> (http://www.ietf.org/rfc/rfc3302.txt), "image/tiff" is defined in terms of >> TIFF 6.0 conformity, so it would be incorrect to refer to a BigTIFF document >> as "image/tiff". IANA has also registered a MIME type "image/tiff-fx" for >> TIFF-FX, defined by RFC 3950, so it would be consistent to shoot for >> "image/tiff-big". IANA requires "publication by a formal standards body," >> though, so it would be more realistic to stake out "image/x-tiff-big". > > This is closely related to the file extension issue. If the file > extension used is similar to existing TIFF (as many here seem to > prefer), then the only way to determine its type is by inspecting the > file header. > > Updated file formats do not always obtain new file extensions or MIME > types. BMP, Postscript, and PDF are excellent examples of this. > > My own inclination is to continue using the existing TIFF file > extensions and TIFF MIME type and let the end applications and users > figure things out. If users start having problems with opening files, > then they will complain to their application vendor so that the > updated format is supported. > > If TIFF is defined by TIFF 6.0 conformity then many existing TIFF > files do not conform. For example, JPEG compression in TIFF does not > conform. > > Bob > ====================================== > Bob Friesenhahn > bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > > _______________________________________________ > Tiff mailing list: Tiff@lists.maptools.org > http://lists.maptools.org/mailman/listinfo/tiff > http://www.remotesensing.org/libtiff/