how to test if a child node have a specific name?

ALl,
I want to test if the first child node is a specific name "NodeName" node.I 
use the following expression.
<xsl:if test="child::node()[1]=NodeName">
  ...
</xsl:if>

But it doesn't work.
Then I changed the expression to 

<xsl:if test="child::node()[1]='NodeName'">
  ...
</xsl:if>

or 

<xsl:if test="name(child::node()[1])='NodeName'">
  ...
</xsl:if>

They all seem work.

I want to know which one is the correct one?
Thanks.


Chen Yi

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