Could someone please remind me the most graceful way in XPath 2.0 of
determining dynamically whether any arbitrary $n is bound to a node or
sequence of nodes (i.e., no atomic values)?

There's some furious parameterization going on and I just can't
remember this. (It's not the kind of thing easy to search for either.)

t:\ftemp>type wendell.xsl
<?xml version="1.0" encoding="US-ASCII"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="2.0">

<xsl:template match="/">
  <xsl:variable name="test1" select="doc(''),doc('')/*/xsl:*"/>
  <xsl:value-of select="count($test1),$test1 instance of node()*,'&#xa;'"/>
  <xsl:variable name="test2" select="$test1,'hello',$test1"/>
  <xsl:value-of select="count($test2),$test2 instance of node()*,'&#xa;'"/>
</xsl:template>

</xsl:stylesheet>
t:\ftemp>xslt2 wendell.xsl wendell.xsl
3 true
7 false

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