[CREATE] XMP : MakerNote

[Cyrille Berger]

> > So I propose, one schema for the data chunk:
> > uri: http://create.freedesktop.org/xmp/MakerNote/1.0
> > prefix: mkn
> >
> > With only value:
> >
> > RawData as a String with the MakerNote encoded in base64
>
> I'm not sure if it fits into XMP and if it is really the way to go.
From Adobe's point of view, it doesn't :)

> Including the blob does not solve any problem, even future. Because said
> data is still in the corresponding Exif, there is no interest in having
> it undecoded in the XMP.
Well there is on interest to have it "somewhere", if the knowledge of how to 
decode them improve in the future.

> > Then as many schema as specification, with an uri of the form
> > http://create.freedesktop.org/xmp/MakerNote/MANUFACTURER/VERSION
> >
> > For instance, for Canon (http://www.burren.cx/david/canon.html)
> > http://create.freedesktop.org/xmp/MakerNote/Canon/1.0
> >
> > With tags beeing:
> > ImageType as string
> > FirmwareVersion as string
> > ImageNumber as integer
> > OwnerName as string
> > CameraSerialNumber as integer
> > MacroMode as boolean
> > Quality as choice
> > FlashMode as choice
> > ...
> >
> > What do you think ?
>
> XMP is *semantic*. That means what is interesting is not the content but
> the meaning. In short Maker Notes would have to be translated into
> something meaningfull.  That's almost what the second part tries to
> address, but I don't think it is the right way. It should be maker
> independent properties, ie not a separate namespace for each manufacturer.
Hum, yes that makes sense. And relooking carefully throught all the available 
spec, there is indeed a lot of overlap.

-- 
Cyrille Berger