> [For example a protocol might use UTR21 + UTR15 form KC when Unfortunately, though this method is hinted in UTR 15 and UTR 21 themselves, that approach is technically ill-defined, and also, orthogonally, has issues as to which 'folding' to use. So this does not, yet, constitute a normal form that can be used for 'caseless' matching. Kind regards /kent k