[XeTeX] how to create and install xexmltex.fmt

[Arthur Reutenauer]

On Thu, Oct 14, 2010 at 12:48:54PM -0400, William Adams wrote:
> .tex UTF-8 Hyphenation patterns for Ancient Greek
> (/usr/local/texlive/2010/texmf-dist/tex/generic/hyph-utf8/patterns/tex/hyph-grc
> .tex
> ! Nonletter.
> l.37 α
>        1 ε1 η1 ι1 ο1 υ1 ω1 ϊ1 ϋ1 ἀ1 ἁ1 ἂ1 ἃ1 ἄ1 ἅ1 ἆ1 ...

  This is normal if you're only loading xmltex; it misses the file that
sets the \lccode values for all the Unicode characters that qualify as
letters.  That file is called to unicode-letters.tex; you need to load
it before latex.ltx during format generation.

	Arthur