[CREATE] XMP : MakerNote

[Leonard Rosenthol]

On Jun 8, 2007, at 6:16 PM, Cyrille Berger wrote:
> I fail to see how having the MakerNote as a blob inside the XMP  
> entry or
> outside is different, you still have a blob at some point in your  
> file.

	Because, as was expressed by someone else, XMP is about semantic  
information that can be easily processed by either human or machine  
(since it's XML organized in defined schemas, or using extension  
schemas).


> Beside XMP allready includes some data whose meaning is undefined,  
> like the
> exif:DeviceSettingDescription, at least this tag from my camera  
> doesn't seem
> decodable by a human :)
>

	OK, we're not perfect ;).


> As for compatibilty with Adobe Creative Suite, the last available
> specification for PSD doesn't include a position to where maker  
> notes are
> stored (unless it can be find in the Meta Data Setting ?) while the  
> XMP entry
> in PSD files is described in the XMP specification, so if the  
> MakerNotes were
> in the XMP it would be possible to extract it. That's one reason why I
> preffer to have all metadata stored the same way in a file.
>

	Are you referring to the older "public" PSD spec, or the one that is  
part of the Photoshop SDK?   I am happy to look into this for you, to  
find out more about where Photoshop, Lightroom, etc. put this...


Leonard