P.S. A good place to start investigating XMP is probably <http:// www.iptc.org/IPTC4XMP/>.

Ian

On 27 Sep 2006, at 10:22, Ian Wood wrote:

I'm primarily a photographer, so know *a bit* about XMP, although not enough to do the actual work...

One thing that would be MUCH easier would be to use XMP sidecar files - instead of embedding the data in the actual image file, you have a bog-standard XML file sitting next to it in the folder, with an identical name but the extension '.xmp'. This would solve all your binary data problems in a stroke, and also solves potential image corruption issues when writing data back into the image file.

Ian

On 27 Sep 2006, at 10:14, Henk van der Velden wrote:

Good day all,

Can anyone help me with editing XMP metadata in image files (JPEG)?

I've searched the archives and I've found some messages about EXIF data and IPTC metadata. But it looks like no one has done XMP reading / editing yet. It wouldn't perhaps be too difficult, since XMP data is 'just' an XML tree put somewhere into the JPEG binary data. But I have no knowledge of binary data, so I can't figure out how to add these metadata to a (JPEG) file.

Another option might be Image Magick. If an external could be built around the Image Magick libraries, that would provide another way to read and edit XMP data.

I need this facility for a new application we are going to build for a couple of local cultural institutions. We need to describe lots of historical photographs, and it looks like the best way to store these descriptions is as metadata inside the files. These images are also to be used in educational applications, where children can read - and eventually edit - the metadata.
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