What is the policy on UTF-8 non single byte characters in the master .xml files?

[Doug Smythies]

Is there a doc group policy statement or guideline
on the use of any non single byte characters in the
master document .xml files? (I.E. use if any
non ASCII characters.)

If yes, please point me to it. If no, can one be
made?

My input on the subject is that they should not be
allowed, however I will defer to any existing
standards.

Currently, there are not very many such characters
in the Ubuntu serverguide master files (say, about
60), and they would be relatively easy to eliminate.

Issues:
. Do not always translate properly.
. Do not always compile into PDF properly.
   . some PDF compile time warnings.
. Messes up "bzr diff" command.
. Do not display properly in some editors.
. Not easily editable in some editors.
. Masks any real source file odd character searches.

Of course, it is understand that multi-byte UTF-8
characters are essential for the translated
documents.

Also, it is acknowledged that every file
starts with:
<?xml version="1.0" encoding="UTF-8"?>
suggesting that use of any UTF-8 characters should
be O.K.

... Doug Smythies