> 	<xsl:key name="ItemsWithName" match="$ItemFiles//item[@name]"
> use="@name"/>


a key only does one document at a time, but it's not usually much pf a
loss, as you can do

	<xsl:key name="ItemsWithName" match="item[@name]" use="@name"/>

...

<xsl:apply-templates
select="$ItemFiles/key('ItemsWithName',current()/@name)"/>

which looks up the key in all the documents held in $ItemFiles.

David



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