'No param' OO style - notetype->new("BB-","kern")->as_abc()

I like that one best. I'd just convert everything to an internal format on object creation, though. SomeClass->new(type => "notetype", ...)->as_abc. From there, you can create very simple wrappers for people who like different methods better, so everyone can have it their way.

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }