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   Re: [xml-dev] SAX Topic 2004-0003: Unicode normalization

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At 9:28 AM -0500 2/22/04, David Megginson wrote:

>- add a feature to XMLReaderFactory, such as
>   http://xml.org/sax/features/unicode-normalization-checking; most
>   appropriate at the factory level (Norm Walsh, 2004-02-19); Jeff
>   Rafter (2004-02-19) and Elliotte Rusty Harold (2004-02-19) disagree;
>   Norm wants feature in factory so that factory can return different
>   parsers (2004-02-20)

It's not so much that I object to doing it on the factory, as that 
the XMLReaderFactory has no 
setFeature/setProperty/getFeature/getProperty methods. THerefore it's 
not possible within SAX as currently designed. Perhaps we should add 
these methods to XMLReaderFactory. However, that's a bigger change 
that should be considered on its own merits, with a range of use 
cases, rather than being shoe-horned in to support this one need. I 
doubt that could be reasonably pulled off in Norm's time frame.

I suspect Norm was thinking of adding this to SAXParserFactory, a 
hideous, evil monstrosity of a class that should be hung, shot, 
beheaded, drawn and quartered, burned at the stake, buried in 
unconsecrated ground, dug up, cremated, and the ashes tossed in the 
Tiber while the complete cast of Wicked sings "Ding dong, the witch 
is dead." Excuse me, I got a little off topic there. I've just spent 
way too much time explaining to users that their code doesn't work 
precisely because they used SAXParserFactory instead of 
XMLReaderFactory, and then having them refuse to believe me because 
Sun is telling them something to use SAXParserFactory.

Anyway, within SAX2 there's no such thing as factory level features 
and properties. Perhaps we should add this. Unlike a lot of the 
things being proposed for this minor update, this would be an API 
level change, so it should probably wait till 2.1.


   Elliotte Rusty Harold
   Effective XML (Addison-Wesley, 2003)


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