Subject: Re: [xsl] Re: Re: An issue with XPath 2.0 sequences (Was Re: RE: Muenchian method, and keys 'n stuff) From: Dimitre Novatchev <dnovatchev@xxxxxxxxx> Date: Fri, 1 Feb 2002 08:30:42 -0800 (PST) |
Completely agreed! --- naha@xxxxxxxxxx wrote: > Quoting Dimitre Novatchev <dnovatchev@xxxxxxxxx>: > > > > > 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... > > That's very dangerous. It means that if one were doing several > different > mapping operations from the same sequence the results could might be > incorrectly aligned. > > I can't fathom how anyone could consider that as acceptable behavior. > __________________________________________________ Do You Yahoo!? Great stuff seeking new owners in Yahoo! Auctions! http://auctions.yahoo.com XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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