I hadn't managed to deduce an effective difference between Tracks and Mapped. I would consider that a column (whatever the heading) for "proportion of the route which is mapped and assigned to the route relation" is useful and reasonably measurable. If it starts in the right place, finishes in the right place, and has no gaps, then it's a reasonable starting assumption that the answer is 100%.

I had taken "Labelled" to be a synonym for "Named", i.e. relevant paths/tracks etc. given a Name tag so that on Mapnik rendering rural sections are marked with the name of the route, in a similar way to the OS does it.