[Digikam-devel] [Bug 134206] rethink about: Iptc.Application2.Urgency <==> digiKam Rating

[Gilles Caulier]

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http://bugs.kde.org/show_bug.cgi?id=134206         




------- Additional Comments From caulier.gilles gmail com  2007-03-11 17:43 -------
Ok, i have find the solution for now, useing Exif tags...

digiKam do not yet support XMP. We need to find a fine alternative.

After to have inverstiguate under M$ Vista, and especially how the pictures metadata are managed by the M$ photo management program, I can said than M$ use XMP and "Exif tags", but never IPTC/IIM :

The rating is stored in a private Exif.Image.Rating Tag, number 0x4746. it a simple short value stored in this tag : 0 star = 0, 1 star = 1, ..., 5 star = 5.

An another tag Exif.Image.RatingPercent is a dupplicate of this one but the value is in percent : 0 start = 0%, ..., 5 star = 100%

I can use this tags in the both way than we use the Iptc.Application2.Urgency.

Also, like the Iptc.Application2.Urgency is now considerated like obsolete in IPTC spec., we can forget this IPTC tag to store Rating.

The advantage to use this M$ Exif.Image.Rating tag is than digiKam will be compatible with the M$ Vista Photo Manager. A photo imported form digiKAm to Vista will be show with the right Rating in M$ Photo manager. And the reverse case is also valid.

What do you think about ?

Gilles