RE: [xsl] Using not(...a nd ... ) to select nodes

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Lars,

At 06:48 PM 7/10/2003, Mike wrote:
> > In order for your code to work, current() in the select
> > expression of a for-each loop must refer to the <item> node
> > currently being tested for whether it gets selected, right?
> > If so, is this the way xsl:for-each / xpath work? I realize
> > that INSIDE the for-each, current() refers to the node
> > currently being processed, but is that also true in the
> > select expression of the for-each? Or does current() there
> > refer to the context node outside the for-each?
>
> current() always refers to the node that "." would refer to if you
> replaced the whole XPath expression containing the call on current()
> with ".".

In other words, your last conjecture is correct: in the for-each select, 
current() refers to the context node outside the for-each. *Within* the 
for-each, the evaluation context changes.

I wrote more of a gloss to try to explain further, but then decided my 
explanation of Mike's heuristic was more confusing than what he said, not 
less. So I deleted it.

I hope it's clear now, anyhow.

Note the OP still hasn't gotten an XPath-based solution using the 
preceding-sibling:: axis as originally posed. David C., jumping ahead to 
the analysis that this is really a grouping problem, offered the (superior) 
key-based solution. Do we care about the XPath?

Cheers,
Wendell


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