Am I right in saying that declaring the <xsl:param /> tag as follows will
make the named node set default to null
assuming you mean empty node set (Xpath doesn't define null)
then no.
<xsl:param name="node-set" select=".." />
it wil default to the parent of the current node at the point the
template is called.
<xsl:param name="node-set" select="" />
that's an error I think an empty string isn't a valid XPath.
what you want is an Xpath that selects an empty node set.
I always use
<xsl:param name="node-set" select="/.." />
Although I've seen Mike Kay use
<xsl:param name="node-set" select="@comment()" />
on this list
David
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