I would like to know the document that define following casefoldings.
I found the following note in SpecialCasing.txt(http://www.unicode.org/Public/UNIDATA/SpecialCasing.txt
# Note: the following cases are not included, since they would case-fold in lowercasing
# 03C3; 03C2; 03A3; 03A3; Final_Sigma; # GREEK SMALL LETTER SIGMA
# 03C2; 03C3; 03A3; 03A3; Not_Final_Sigma; # GREEK SMALL LETTER FINAL SIGMA
But I couldn't find the document that define them, as far as I am concerned.
So if you know any documents that define above casefoldings, please let me know.