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Re: An issue with XPath 2.0 sequences (Was Re: RE: Muenchian method, and keys 'n stuff)
- From: David Carlisle <davidc at nag dot co dot uk>
- To: xsl-list at lists dot mulberrytech dot com
- Date: Fri, 1 Feb 2002 09:33:05 GMT
- Subject: Re: [xsl] An issue with XPath 2.0 sequences (Was Re: RE: Muenchian method, and keys 'n stuff)
- References: <001701c1aab2$bed9a600$78fe0250@pcukmka>
- Reply-to: xsl-list at lists dot mulberrytech dot com
> Nevertheless, I'm reasonably comfortable with it.
I think the place where it breaks down most spectacularly is when it is
combined with the apparent desire to model SQL NUL values as () using a
list, even an empty one, as a value does not really combine with the non
nested list model, which means that these "NUL" values vanish at
interesting times and lead to strange anomalies in accumulation
functions like sum() and the loss of the useful lisp-like
non-empty-node-set = true coercion that was in Xpath 1 but only works
in Xpath 2 "most of the time".
David
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