Hello Karl Williamson, you are asking:
But I don't understand the titlecasing part. Is it meant, when titlecasing the base character the iota subscript is combined with? That would also make sense, but then I would think it should move and become a small letter iota instead, U+03B9.
Read the pertinent passage in the Unicode standard, <http://www.unicode.org/versions/Unicode5.2.0/ch05.pdf#G29675>. Good luck, Otto Stolz
