Subject: RE: Re[2]: Aggregate From: Kay Michael <Michael.Kay@xxxxxxx> Date: Mon, 13 Nov 2000 10:08:56 -0000 |
> > I would like to know if we can find out Maximum and Minumum > of a element in > > a xml file using xsl or any other XML technologes. > > The best way involves an XPath: the minimum value is the value of the > node such that there are no other nodes that have a value less than > that value; the maximum is the value of the node such that there are > no other nodes with a value *more* than that value. > > So, to find the maximum of the 'in' elements, use: > > in[not(parent::TIME/in > .)] Hadn't seen that one before, thanks, Jeni. But I'd express caution, certainly for large node-sets. This is likely to be an O(n-squared) solution (it certainly is in Saxon). Doing an XSLT sort and extracting the first or last element is likely to be O(n*log(n)). Doing a recursive walk of the node-set as described in XSLT Prog Ref page 171 is likely to be O(n). And of course there's always saxon:highest() and saxon:lowest(). Mike Kay XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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