User blog comment:Boboris02/Measuring the strength of ABHAN part 1/@comment-73.235.194.108-20170328151802/@comment-27516045-20170329004349

Or like the {x}_1 separators in UNAN. You'll see how they work when I get there, but the whole point is that basically any separator with a subscript 1 (or a \{} in BHAN, or a * in your notation) at the outer level "ranks higher" than all other separators, like how W ranks higher than all normal ordinals.

By the way, AFC (You really should sign up), I can help with extending your notation. I can post on the talk page, or you could come onto the IRC or Discord servers, and I and others will help you.