[4suite] Namespace bug in 4DOM (Pretty)Print ?

[Uche Ogbuji]

Note that I've fixed this and other such situations to now give a
namespace exception, but I also wanted to point something important out.

> I have a problem in (the old version of) Print / PrettyPrint regarding
> attributes and namespaces:
> 
> >>> from xml.dom.ext.reader import Sax2
> >>> from xml.dom.ext import PrettyPrint
> >>> d=Sax2.FromXml('<doc/>')
> >>> e = d.createElement('elt')
                        ^^^
> >>> d.documentElement.appendChild(e)
> >>> e.setAttributeNS('http://logilab','att','value1')
                   ^^^^

Bad idea.  DOM L2 reluctantly allows mixing NS and non-NS code for
strict backward compatability, but they point out that it's very bad
practice to do so.  If you're using NS functions, use _only_ NS
functions.  If you're using non-NS functions, use only non-NS
functions.  So you should either be using createElementNS above, or
setAttribute.  You shouldn't mix the forms within a single document. 
It's strictly correct, but you'll have some weird effects.


-- 
Uche Ogbuji                               Principal Consultant
uche.ogbuji at fourthought.com               +1 303 583 9900 x 101
Fourthought, Inc.                         http://Fourthought.com 
4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA
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