One way could be:
<xsl:template match="fruit">
<xsl:variable name="x">
<xsl:value-of select="."/>
</xsl:variable>
<xsl:if test="$x!=''">
<!--DO SOMETHING-->
</xsl:if>
</xsl:template>
That's an amazingly long-winded way of writing
<xsl:if test=".!=''">
<!--DO SOMETHING-->
</xsl:if>
but it should work. Provided that the test you want is that the element
exists and has a string-value of "". This isn't the same as a test that the
"node has data", for example the element might have attributes and child
elements and still not satisfy this test.
Michael Kay