# Special case for final form of sigma. ::NFD(); # C is preceded by a sequence consisting of a cased letter and then zero or more case-ignorable characters, # and C is not followed by a sequence consisting of zero or more case-ignorable characters and then a cased letter. # 03A3; 03C2; 03A3; 03A3; Final_Sigma; # GREEK CAPITAL LETTER SIGMA # With translit rules, easiest is to handle the negative condition first, mapping in that case to the regular sigma. Σ } [:case-ignorable:]* [:cased:] → σ; [:cased:] [:case-ignorable:]* { Σ → ς; ::Any-Lower; ::NFC();