Tag for non-game datamined images

Some background context:

I'm not sure whether the non-web sources of the posts in pool #30536 are correct. The same album is on E-Hentai (link in the pool description) and they seem to be the same files based on resolution and file size, but the uploader only put the album name in the source field. However, they're from a digital album, so if the uploader obtained it and extracted the images, the files would most likely be exactly the same.

To sum it up, it's hard to tell in cases like this whether the uploader didn't want to give a link for some reason or if they got the images from the actual product. It would be helpful to have a tag for specifying the uploader ripped the images from the album. The pool's sourcing is not what I'm focusing on; that's just the instance that led me to suggest this.

I think self-datamine would work if it didn't currently imply game asset. But before unimplying these, I think we should see if we can make a tag for non-game self-rips, but "self-datamine" is the only option I can think of right now. Does anyone have any ideas?

If it's a digital album you should be sourcing it to the dlsite/etc link you got it from, not some random non-web source. The only case I could imagine not covered by either self-scan or self-datamine would be ripping things from anime blu-rays, which is probably niche enough to deserve its own tag.