Am Donnerstag, 18. Juli 2013, 09:05:31 schrieb Willem Ferguson: > In all fairness to the dt developers, users, note that the metadata and > tagging issues are currently listed in the Developer's Wiki as 'Features > under consideration' in the section 'Versions and Roadmap'. The question > is whether there is any interaction possible between users and > developers that can at this stage help so that these features become a > reality.
I have been reading the discussions about metadata handling for some time now. Since you finally moved it to the developers list I feel that the time has come to start getting some input from you. Currently dt has only a hand full of fields that mostly come from dublin core. However, we mix the semantics up somehow and treat them like XMP fields, it's all quite messy. So the first question that needs to be sorted out is "is supporting IPTC enough?" or do we also need all the exif and XMP fields? And if we decide that IPTC is all we need, are there standardized translations to/from exif and xmp? Because, if we get fed an image (or sidecar file) that contains relevant information in those metadata sets, we surely want to keep them. The alternative would be to support all possible data sets, however, that would mean that we 1) have to decide what to do when the user changes the "Author" value in exif. Shall it be changed for IPTC, too? 2) have to find a way to not make the GUI too cluttered and ugly, I personally would favour limiting ourselves to IPTC in the GUI and when finding some other data sets while reading the image we should translate these to IPTC. The next step after deciding what we actually need is to find a suitable way to store that in the database and sidecar file (some of these are trivial decisions, I just wanted to write them down once). TL;DR: [0] alone will probably not be enough, but what about also supporting [1]? Is our current set completely supported by that? > Kind regards, > wf Tobias [...] PS: You might have noticed that I don't intend to add all the technical exif data to the list of editable things in the GUI. If someone intends to change the aperture, well, go ahead, but not from inside dt. <-- Comments welcome ;) [0] http://www.exiv2.org/tags-xmp-iptc.html [1] http://www.exiv2.org/tags-xmp-iptcExt.html
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