I've been thinking about this problem for a while as I attempt to develop my ideal note-taking system. There's a strange halfway between tags and folders, the g

I've been thinking about this problem for a while as I attempt to develop my ideal note-taking system. There's a strange halfway between tags and folders, the gist of which seems ideal but it has so far escaped a full description. I started considering tagging tags as a way to create hierarchy, but I'm not sure how far down that rabbit hole I want to go.