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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 é (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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