> if there's any reserved word or something to refer to an empty-nodeset.
> Let's say the reserved word is "ENS" (Empty Node Set), that way you could 
> write something like this:
> 	
> 	<xsl:if test="Parent/MyNode=ENS">...</xsl:if>

There are no reserved words in XPath at all (which is an important
feature as it has to work with any XML: ENS in the above selects child
elements called ENS, there are no words "free".

In this case you dion't want an = test at all, a non empty node set
coerces to true, so you just need

<xsl:if test="not(Parent/MyNode)">...</xsl:if>

David

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