Tag a Bookmark, make bookmarks part of a tag

As my collection grows, I find tags and bookmarks both very helpful to rediscover my music based on my mood, my preferred style, time of year, etc, etc.

It is possible to select tags and then make a bookmark, but how about the other way around?

For example my ‘Sunday morning’ tag has albums and 2 playlists, but I would also like to add 1 or 2 bookmarks to this tag. I guess this is not possible now (?), so I post this a feature request.