<xsl:template name="insert">
<xsl:param name="default" />
<!-- various stuff using $default-->
</xsl:template>

And eventually I do
<xsl:call-template name="insert">
<xsl:with-param name="default" select="$named-nodes[1]/@default" />
</xsl:call-template>
...
I have tried adding as="xs:string" to the xsl:with-param and also to the
xsl:param as I'd have thought that even though it may be the case that
the processor would reject an empty node-set or sequence if I was
passing one it should surely expect a string to be allowed to be empty.

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