Philippe Verdy : >>Clearly there does seem to be missing a Greek letter,
I hope there is no suggestion of encoding the huge variety of Greek abbreviations and ligatures. The early printed Greek texts used type designed to follow the manuscripts, but thank goodness that was dropped before long. There is a bewildering number of these signs. See, for example http://commons.wikimedia.org/wiki/File:Greek_alphabet_ligatures.jpg and that's just the start of it. Raymond Mercier
