Re: Indexing Tree Elements

Kay Michael wrote:
> 
> > I have a template that is called for all instances of an element;
> > is it possible that it may compare its attributes with the attributes
> > of the previous document-tree node of the same level?  Is it possible
> > to index elements in such a manner?
> 
> Yes (in XSLT) (well almost).
> 
> <xsl:if test="@value=preceding-sibling::*[1]/@value">
> 
> does roughly what you want. The only caveat is that the "previous node on
> the same level" must be a sibling, not a cousin. If you want to test against
> an n-th cousin for any value of n, use
> preceding::*[count(ancestor::*)=$depth][1] where $depth is initialized to
> count(ancestor::*) for the context node. And be patient while it executes.
> 
> I'm not sure what you mean by "indexing elements".
> 
> Mike Kay

Thanks for your help, Mike.  By 'indexing' I just meant something like:

	if (node[$i] == node[$i-1]) then....

BTW, are you the Mike Kay of the fabulous book I've just bought?
If so, thanks for writing!
-- 
Lee Goddard  <l.goddard@sussex>
Research Centre for Cognitive Science, 
University of Sussex, Brighton UK


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