Do these Alamy keyword objects have XMP addresses?
I think so. It was described to me as "XMP fields".
In PS File Info > Advanced there is one item that looks like this:http://ns.alamy.com/1.0/
alamy:EssentialKeywords (bag container)
alamy:MainKeywords (bag container)
alamy:ComprehensiveKeywords (bag container)
...and each of these have sub-items that correspond to the keywords, e.g.:
It is perhaps a proprietary implementation made by the Image Keyworder people but it certainly gives you some ideas of how to try to deal with the challenges that Alamy creates for its contributors...
I have recently realised that there are some odd limitations to how Portfolio can embed metadata so it will have to be investigated how it could (perhaps) be done. (Have made a post on the P forum on it.)
I probably need to read up on XMP fields in file metadata to understand what this is actually about...
(But now I probably have to get going on actual keywording instead of trying to figure out the technolgy behind it...)