in reply to Re: Unicode vulgar fraction composition
in thread Unicode vulgar fraction composition

Right, which is why, on the surface, it's curious that both NFKD and NFKC return decomposed forms. Some illumination is provided in the documentation: NFKD performs "compatibility decomposition," while NFKC performs "compatibility decomposition followed by canonical composition." So apparently what I want is "compatibility composition," which it seems nothing in that module performs. Thus my question amounts to: does anything else in Perl do compatibility composition?