Basically, I want a template that will output the text of a node for an
arbitrary XPath if that node exists. If the node doesn't exist, I want
it to produce "--".
in xslt 2
<xsl:value-of select="(/path/to/single/node,'--')[1]"/>
in xslt 1
<xsl:variable name="n" select="/path/to/single/node"/>
<xsl:value-of select="$n"/>
<xsl:if test="not($n)">--</xsl:if>
David
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