I said:
        <xsl:element name="grandTotal" select="sum(/doc/num)"/>

This was rather dumb of me. I can't have a select attribute on an
xsl:element.

I meant to say:
        <xsl:element name="grandTotal">
            <xsl:value-of select="sum(/doc/num)"/>
        </xsl:element>

Although the other example,
        <grandTotal><xsl:value-of select="sum(/doc/num)"/></grandTotal>
is probably the better of the two.

Sorry about that.


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