Re: Gag me with a blunt …

[Tim Bray <tbray@textuality.com>]

At 06:00 PM 16/03/01 -0500, John Cowan wrote:
>XML 1.0 chose not to implement non-ASCII whitespace characters from Unicode 2.0.

To be honest, I don't think we ever articulated the principle,
or proceeded from it.

However, the discussion over Ideographic Space, U+3000, was long 
and agonized, thus the decision to omit it from the production for 
"S" was not lightly taken at all.  It's hard to see how you could 
let in U+0085 without letting in ideospace and a bunch more 
characters that have in some respect the characteristics of 
white-space-ness.  Someone sent me a note offline giving a long 
list of such items, and it's pretty clear that letting in U+0085 
could start us down a slippery slope.  

Note (although no processor other than Lark ever did this as
far as I know) that if you want to build a DFA-based XML
processor, you can use the trick of recognizing all the syntax
characters with a 7-bit state table and a remarkably small 
amount of clever sidestepping is required to deal with all
the non-ASCII characters.  -Tim