Re: XM_FORMATTER

(I was a bit in a hurry so forgot a few points:)

> If you do need proper xmlns support you need to put 
> the XM_XMLNS_GENERATOR filter BEFORE the pretty 
> printing.

In Gobo CVS. It's missing from Gobo release, and 
there's probably no non-broken way to output 
correct xmlns from a tree in 3.3.

Also using a tree may make sense if you do use
the tree for something else than printing an 
event stream.

As for the xml declaration, I can't check
at the moment (I'm away from my PC, and sourceforge's
CVS browser is broken) but it might be missing at the
moment, which may actually make (some) sense because:

- the printer filter controls the encoding
  and always uses the utf8 default encoding
  (because it gets encoding-neutral strings
  as input)

- the version is assumed to be 1.0 (it 
  might be that a valid event stream could
  only be printable as 1.1, e.g. if it
  contains some control chars, but that's
  not dealt with currently at all).

So no declaration is valid. Also using the
declared encoding from the input's declaration
event, which just reflects the input, but not 
the parsed state or output, would be incorrect.

It would probably be more correct to output a 
declaration with the version, because this is 
preferred to no declaration (to clearly identify 
XML docs) and when 1.1 is supported deal
with it, maybe an option, maybe triggered by 
the declaration event.

Also we could allow various encodings on 
output although that may not be very useful.

If you do want an xml declaration now, you 
can easily have one with any Gobo version by 
extending the pretty print filter (inherit and 
redefine on_start or the declaration event).



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