New answers tagged xmp
If you are storing standard metadata fields such as camera information, it would probably be easiest to stick to the well defined field names and types of EXIF. It may mean better compatibility with other applications that may not have as good support for XMP. Your other option is to simply use both as they can co-exist in the same file.
So after a little digging and with the help of Murat's hint I found the following field in some pictures. This basically is the way that Adobe Lightroom stores the information and it could be used as a defacto standard in your project. We already went for a similar solution with our own field name and no use of rdf, but just to close this question here is ...
Top 50 recent answers are included