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Re: Re: xpath: which is right?

• To: Dimitre Novatchev <dnovatchev@y...>
• Subject: Re: Re: xpath: which is right?
• From: Bob Foster <bob@o...>
• Date: Sun, 04 Apr 2004 12:08:11 -0500
• Cc: xml-dev@l...
• In-reply-to: <c4om3p$odc$1@s...>
• References: <39CA7AD8-859A-11D8-9E28-000A95CDF1FE@i...> <406F245D.1090602@o...> <c4om3p$odc$1@s...>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007

Dimitre Novatchev wrote:

 >>In XPath 2.0, preceding is defined to return its results in document
 >>order. So, starting from the fu element, libxslt is right or wrong,
 >>depending on whether it is following XPath 1.0 or 2.0 rules, 
respectively.
 >
 > Where did you get that from?

I got that from XML Path Language (XPath) 2.0 W3C Working Draft 12 
November 2003, and the sentence: "the preceding axis contains all nodes 
that are descendants of the root of the tree in which the context node 
is found, are not ancestors of the context node, and occur before the 
context node in document order". But on reading further, I see you are 
correct, this does not imply that the result is in document order. I was 
wrong. libxslt gives the right answer, period. Thanks for pointing out 
my mistake (and misconception).

Bob Foster

 > In the latest WD I read:
 >
 > "In a sequence of nodes selected by an axis step, each node is assigned a
 > context position that corresponds to its position in the sequence. If the
 > axis is a forward axis, context positions are assigned to the nodes in
 > document order, starting with 1. If the axis is a reverse axis, context
 > positions are assigned to the nodes in reverse document order, 
starting with
 > 1. This makes it possible to select a node from the sequence by 
specifying
 > its position."
 >
 > http://www.w3.org/TR/xpath20/#axes
 >
 > and this is essentially the same as in XPath 1.0
 >
 > So, starting from the "fu" element libxslt is wrong in both cases --
 > regardless if it is
 > following the rules of XPath 1.0 or those of XPath 2.0.
 >
 >
 >
 > Cheers,
 >
 > Dimitre Novatchev,
 > FXSL developer,
 >
 > http://fxsl.sourceforge.net/ -- the home of FXSL
 > Resume: http://fxsl.sf.net/DNovatchev/Resume/Res.html
 >
 >
 >
 >
 >
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 >

• References:
  • xpath: which is right?
    • From: Suzan Foster <su@i...>
  • Re: xpath: which is right?
    • From: Bob Foster <bob@o...>
  • Re: xpath: which is right?
    • From: "Dimitre Novatchev" <dnovatchev@y...>

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