Here is an example of one way of getting the Absolute Value of some amount in Xslt. This uses format-number() to change the numerical value to a string, ignoring any negating hyphens. Once done, number() is called to return to a numerical value.
<td>
<!-- // AbPErrDeadModel -->
<xsl:value-of select="100 * number(format-number(($DeadZero - $DeadModel) div $DeadZero), '###0.0###;#')"/>
</td>
In the format string, '###0.0###;#', the semi-colon separates the format patterns for positive and negative numbers. The second hash or pound or sharp symbol indicates a copy of the positive format, and no leading hyphen or other indication is defined for negative numbers, so they come out the same formatted string as positive numbers.
