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[xsl] Unique question

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I'm trying to take the XPath expression "*/*/@index" and determine how many
unique vales there are - within my current context.
I've tried various axis expressions and can't seem to figure it out... I'd
be happy with either: 
A. the ability to count the unique nodes (and I'll compare to count of all
nodes)
B. just knowing there are duplicates.

Example: Within each group, the table and view indexes need to be unique.
Data in first group is OK, the 'view' in the second group is a duplicate...

<group>
	<tables>
		<table index="1"/>
		<table index="2"/>
	</tables/>		
	<views>
		<view index="3"/>
		<view index="4"/>
	</views/>		
</group>
<group>
	<tables>
		<table index="1"/>
	</tables/>		
	<views>
		<view index="1"/>
	</views/>		
</group>

Thanks,
Darren
_______________________________________________
Darren Hayduk | Network Management
Nauticus Networks, Inc.
200 Crossing Blvd, Framingham, MA 01702
508-270-0500 x299


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