[xsl] counting matches between list items

["Beck, Matthew" <MBeck@xxxxxxxxxxxxxxx>]

I'm new to XSL, so this might be a simple question. I'm trying to compare
the items in two lists using XSL to check if an item at a certain position
in the two lists matches. For example, the lists below have 1 matching item.

<LISTS> 
	<LIST_A> 
		<ITEMS> 
			<ITEM type="dog" /> 
			<ITEM type="cat" /> 
			<ITEM type="fish" /> 
		</ITEMS> 
	</LIST_A> 
	<LIST_B> 
		<ITEMS> 
			<ITEM type="dog" /> 
			<ITEM type="fish" /> 
			<ITEM type="cat" /> 
		</ITEMS> 
	</LIST_B> 
</LISTS> 
I've tried using count() <xsl:variable name="listMatches"
select="count(LISTS/LIST_A/ITEMS[normalize-space(./attribute::type)=LISTS/LI
ST_B/ITEMS/attribute::type])"/> But count() does not take the position of
the elements into account. I can't figure out how to accumulate a count
using <xsl:for-each>. If anyone has any suggestions, please let me know. 
Thanks, 
- Matthew 


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