[xsl] Counting nodes efficiently

Subject: [xsl] Counting nodes efficiently
From: Brian Grainger <granam@xxxxxxxxxxxxx>
Date: Wed, 18 Feb 2004 13:06:54 -0700

I've been using Jeni's method from the XSLT FAQ to assign unique id's to nodes. In order to speed things up, can anyone think of a way that I could store the running totals for the different nodes, rather than having to call the count() function repeatedly? A generalized method would obviously be the best, so that it could be applied to any arbitrary set of nodes, but I don't know if this is even possible.

<xsl:template match="*">
  <xsl:variable name="name" select="name()" />
  <xsl:element name="{name()}">
    <xsl:attribute name="id">
      <xsl:value-of select="concat($name, '-',
      count(preceding::*[name()= $name]) +
      count(ancestor::*[name()= $name]))" />
    <xsl:apply-templates />

Thanks very much for any suggestions.


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