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Subject: Counting Path Occurrences

Subject: Subject: Counting Path Occurrences
From: "Scott Coon" <scoon@xxxxxxxxxxxxx>
Date: Thu, 29 Mar 2007 18:35:54 -0700
 Subject:  Counting Path Occurrences
Hi - I'm trying to write a generic stylesheet to count occurrences of
full paths to elements.  For example, I'd like input like this:


To generate this output:

/a - 1
/a/b - 2
/a/b/x - 3
/a/b/x/w - 3
/a/b/y - 1
/a/c - 1
/a/c/w - 2

So, start with a stylesheet function to generate the paths (/a/b/x)
using the ancestor-or-self axis:

<xsl:function name="gn:path">
	<xsl:param name="node" as="node()"/>
	<xsl:for-each select="$node">
		<xsl:for-each select="ancestor-or-self::*"><xsl:value-of
select="concat('/', name())"/></xsl:for-each>

My hope was to use it like this in the template that matches "/":

<xsl:for-each-group select="descendant-or-self::*"
	Path: <xsl:value-of select="gn:path(.)"/> - Count: <xsl:value-of

Unfortunately, stylesheet functions only return item()*, not string, so
this doesn't work - the current-grouping-key() is always something like
"/a" or "/x".  Could I concatenate all the pieces of the sequence with a
template, then return that out of function (since a 1-element sequence
is the same as the single element?)  Or is there a cleaner way?

Scott C.

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