On Fri, Aug 20, 2010 at 1:02 PM, Wendell Piez
<wapiez(_at_)mulberrytech(_dot_)com> wrote:
Dear Dimitre,
At 12:00 PM 8/20/2010, you wrote:
In fact the expression I proposed also covers your "first definition".
Of course -- I'm sorry if I wasn't clear that a single space character would
pass your test. But it doesn't do so exclusively. If "a white space" is
meant to designate *only* a single character, the test (as you know) has to
be tighter. And either way, we also get to worry about what that character
can be. Space, tab, non-breaking space, zero-width space ...
The question said "white space". Not "white space character".
Also in your message you were describing the solution to your "first case" as:
"For the first definition, one might want
translate(product/text(),'
	',' ')=' ' "
So, it seems that your "first case" defines whitespace as containing
one or more newline and tab characters. There is nothing in your
proposed XPath expression that restricts the test for "*only* a single
character".
Once again, the XPath expression I came up with fully covers this case.
--
Cheers,
Dimitre Novatchev
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Truly great madness cannot be achieved without significant intelligence.
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To invent, you need a good imagination and a pile of junk
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Never fight an inanimate object
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You've achieved success in your field when you don't know whether what
you're doing is work or play
Do note that there is only a single definition for whitespace in the
XML Recommendation (http://www.w3.org/TR/REC-xml/#sec-common-syn) :
[3] S ::= (#x20 | #x9 | #xD | #xA)+
and this is exactly what the normalize-space() function handles
(http://www.w3.org/TR/xpath-functions/#func-normalize-space):
"Summary: Returns the value of $arg with whitespace normalized by
stripping leading and trailing whitespace and replacing sequences of
one or more than one whitespace character with a single space, #x20.
The whitespace characters are defined in the metasymbol S (Production
3) of [Extensible Markup Language (XML) 1.0 Recommendation (Third
Edition)]."
Certainly. (And I know you know I know this. :-)
My point (as I know you know) is that problem statements relating to
whitespace in transformations -- or XML processing in general -- often do
not make reference to this spec. In fact, they are often given without any
awareness that such a definition exists. (The list archive will show this
time and time again.)
Cheers,
Wendell
======================================================================
Wendell Piez
mailto:wapiez(_at_)mulberrytech(_dot_)com
Mulberry Technologies, Inc. http://www.mulberrytech.com
17 West Jefferson Street Direct Phone: 301/315-9635
Suite 207 Phone: 301/315-9631
Rockville, MD 20850 Fax: 301/315-8285
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