Dear Thanos,
please direct the same question to the XeTeX mailing list -
http://www.tug.org/mailman/listinfo/xetex (or to François Charette,
the author of Polyglossia).
TeX hyphenation patterns don't have much to do with the issue you just
described and you'll find more XeLaTeX experts on that list.
Mojca
On Sun, Jan 17, 2010 at 03:05, Thanos D. Papaïoannou wrote:
> Dear all,
> Compiling a XeTeX document with polyglossia using TeX Live 2008 turns
> \MakeUppercase{Αιμίλιος ή Περί αγωγής}
> to
> ΑΙΜIΛΙΟΣ Η ΠΕΡI ΑΓΩΓHΣ
> instead of the correct
> ΑΙΜIΛΙΟΣ Ή ΠΕΡI ΑΓΩΓHΣ
>
> What is the proper way to solve this problem? Alternatively, is there
> a hack to temporarily disable polyglossia around the “ή” so that I may
> explicitly put in the capitalised form “Ὴ” in the source code? Thanks
> in advance.
