> [Original Message]
> From: Jukka K. Korpela <jkorpela@cs.tut.fi>
>
> Or is there some imaginable use for C1 Controls in XHTML?

Well, XML uses Unicode for its character set and Unicode
recognizes the effect of U+0085 NEL as a new line character,
but the other C1's have no effect in Unicode per se, so the net
effect is relatively harmless, even in the case of a mistaken
identity of the character set.  In addition XML 1.1 only allows
NEL, the rest of the C1's must be present thru the presence
of character references only, so any future XML spec will
handle the C1's in a manner you think is appropriate.