[Digikam-devel] [Bug 264007] XMP sidecar file does not distinguish between images of the same name but with different extension

[Milan Knizek]

https://bugs.kde.org/show_bug.cgi?id=264007





--- Comment #3 from Milan Knizek <knizek volny cz>  2011-01-24 20:18:24 ---
I googled shortly and it looks like Adobe Lightroom intended XMP sidecars only
for images, which cannot easily embed the xmp inside. That is: XMP would exist
only for raw workflow to camera proprietary formats.

I.e. Adobe first created a flexible solution and then limited it to raw files.

Another trouble arise if a sidecar is shared for image.jpg and image.cr2: if
the user adds tags to cr2 file, it gets written to image.xmp, however image.jpg
would not get automatically updated for the new tags. As a consequence, if the
user adds different tags to image.jpg, the image.xmp gets overwritten and
original tags are lost...

So either digiKam disables writing sidecars for image types, which support
embedding (which would be a pitty IMHO and would not solve the problem for
situations like image.crw vs image.cr2 anyway), or better start using
image.ext.xmp format.

The latter might of course create incompability with other applications...

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