The only way I can think of to get around it is something like:
<xsl:choose>
<xsl:when test="string(number(discount))='NaN'">
Discount: <xsl:value-of
select="format-number(0, $currencyformat)"/>
</xsl:when>
<xsl:otherwise>
Discount: <xsl:value-of
select="format-number(discount, $currencyformat)"/>
</xsl:otherwise>
</xsl:choose>
Seem awfully long-winded. Anyone got any ideas?
As Andrew says, long-windedness in XSLT 1.0 is a fact of life. But there are
some coding tricks available when it gets out of hand. For example
format-number(concat('0', discount), $currencyformat)
Michael Kay
http://www.saxonica.com/
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