[xsl] Only child test

Just curious how other's might approach a test to determine if the
current node is *not* an only child. This works fine but it feels a
little heavy to me.  Thoughts?

                <xsl:if test="(count(preceding-sibling::*) +
count(following-sibling::*)) &gt; 1">
                    <hr/>
                </xsl:if>

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