Re: Re: An issue with XPath 2.0 sequences (Was Re: RE:

> > 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

Also as Jeni pointed out the weird case of sequences changing their
cardinality when mapped by a function that may return the null
sequence...

Dimitre.


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