RE: Indexing Tree Elements

Subject: RE: Indexing Tree Elements
From: Kay Michael <Michael.Kay@xxxxxxx>
Date: Fri, 7 Jul 2000 14:10:50 +0100
> 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


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