[Digikam-users] IPTC, EXIF, Kphotoalbum

[Caulier Gilles]

Le Mardi 31 Octobre 2006 15:23, Hubert Figuiere a écrit :
> > Though Kphotoalbum seems to better suit my needs, I worry about it not
> > writing tags into pictures (in the case of the need to step to another
> > software - I wouldn't lose all the tagging work done). digikam,
> > through IPTC tagging seem to produce more portable work.
>
> The solution is to use sidecar XMP files. XMP is a standard for metadata
> that is established by Adobe and encompass EXIF, IPTC and DublinCore in
> a RDF (XML) container. It specifies writing metadata to various types of
> files including JPEG, PNG and TIFF, and it has a pure XML form that can
> be used for sidecar files.
> Sidecar files are files that are stored next to the one they relate to.
> Like img_1234.cr2 has img_1234.xmp as a sidecar file.
> Sidecar files is the method chosen by various proprietary digital photo
> management software including Adobe Lightroom.
>

XMP metadata will be supported by Exiv2 in the future, and of course, by 
digiKam.

No need to have a separate XML file to store these metadata : XMP is supported 
by JPEG, PNG, and TIFF/EP, like an embeded metadata directly in file, exactly 
like IPTC and EXIF are.

Gilles