I know this is an old thread, but I have a question related to it. So, I'd love to use tags to organize things. The problem is I have >9000 images, mainly untagged, that I'm pulling from another system. They're already broken up by folder, since that's how I organized them before.

What I'd really like to do is have a CLI tool that I can use to set the tag(s) for all files in the current folder. Something like:
The problem is, tracker on the N900 apparently doesn't use standard tracker tags. When I do a tracker-tag -t, it says there are 0 tags. And tagging things with tracker-tag does tag them for tracker-tag, but does not tag them in the way the ImageViewer expects them, and thus is not useful.

It appears that the N900 system is instead using the DC:Subject field to store tags (separated by pipes for multiple values). I can query all I like and find images tagged with tracker-info and tracker-query, but I can't seem to find anything that lets me alter or set the value set in DC:Subject for a specified file.

Anyone have a pointer on a way to do this? I'd rather not have to highlight 9000 files and set their tags manually....