Summary The alternative solution to Qing-Hua Jiang's code is of course one using recursion, i.e. a named template calling itself recursively. It is not that fascinating, as it uses a standard approach to computing in XSLT, but its advantage is that it works also with XSLT processors (like, for instance James Clark's XT) that do not have the "node-set" extension function implemented.

Additional information

<?xml version="1.0"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:template match="/"> <table border="1"> <tr> <td>Item No.</td> <td>QTY</td> <td>Price</td> </tr> <xsl:for-each select="/order/item"> <tr> <td> <xsl:value-of select="itemNo"/> </td> <td> <xsl:value-of select="QTY"/> </td> <td> $<xsl:value-of select="price"/> </td> </tr> </xsl:for-each> <tr> <td>Total-sum(QTY*price):</td> <td colspan="2" align="right"> <xsl:call-template name="total"> <xsl:with-param name="items" select="order/item"/> </xsl:call-template> </td> </tr> </table> </xsl:template> <xsl:template name="total"> <xsl:param name="items"/> <xsl:param name="count" select="count($items)"/> <xsl:param name="result" select="0"/> <xsl:choose> <xsl:when test="$count=0"> $<xsl:value-of select="format-number($result,'#.00')"/> </xsl:when> <xsl:otherwise> <xsl:call-template name="total"> <xsl:with-param name="items" select="$items"/> <xsl:with-param name="count" select="($count)-1"/> <xsl:with-param name="result" select="$result+$items[$count~/QTY * $items[$count~/price"/> </xsl:call-template> </xsl:otherwise> </xsl:choose> </xsl:template> </xsl:stylesheet>