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RE: [xml-dev] Saxon and Sun Serializer problems?

On Fri, 29 May 2009 14:40:38 -0700, Jim Tivy wrote:
> With regards to what a Transform Identity means - what does identity means.
> If it means InfoSet identity then if I read Infoset right: 

But it doesn't.  The infoset specification came out after DOM and SAX 
and XPath, and attempted to unify the various different models.  XPath 
(1.0 in this case, I assume) has its own notion of what is and is not 
important (or even visible).  XSLT (1.0) builds upon XPath.

> If it is XPath/XQuery DM identity - then if as you say there may be no idea
> of a DocType there, then that is a perhaps a flaw.

I dunno if they've addressed the issue in the XQuery Data Model (which 
is post-infoset, and an attempt to be still more formal and rigorous), 
as the doctype declaration or internal subset effectively exists at a 
"different layer" of processing (this is true even for bare XML 1.0, 
pre-edition-X, pre-namespaces, pre-infoset).  It is, roughly speaking, 
the same reason that an identity transform of é is considered 
correct if it produces  (the transformation does not operate at the 
processing level that exposes general parsed character entities; it 
just gets characters ... and likewise, the doctype decl and internal 
DTD subset are gone before it has a chance to look at them).

Amy!
-- 
Amelia A. Lewis                    amyzing {at} talsever.com
According to Business Week, in the 1990s the ratio between a chief
executive's salary and the takehome pay of the typical, feckless, 
whining grunt on the shopfloor rose from 85:1 to 475:1. (In the UK, 
which is seeing a vigorous popular backlash against "fat cat" pay 
packets, the ratio is 24:1).
               -- The Register


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