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<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
xmlns="http://www.w3.org/TR/REC-html40">
<!-- FileName: misc-evans -->
<!-- Document: http://www.w3.org/TR/xslt -->
<!-- DocVersion: 19991116 -->
<!-- Purpose: COPY of perf test;"A Practical Suggestion for XSLT Performance Improvement" by Clark Evans. -->
<xsl:variable name="day-list"
select="//dow[not(.=following::dow)]" />
<xsl:variable name="product-list"
select="//product[not(.=following::product)]" />
<xsl:template match="/">
<xsl:variable name="my-test"><a><b/></a></xsl:variable>
<html>
<xsl:copy-of select="$my-test"/>
<body>
<table>
<tr>
<td><xsl:text> </xsl:text></td>
<xsl:for-each select="$day-list">
<xsl:sort order="ascending" select="." />
<th><xsl:value-of select="."/></th>
</xsl:for-each>
</tr>
<xsl:for-each select="$product-list">
<xsl:sort order="ascending" select="." />
<xsl:variable name="product" select="." />
<tr>
<td>
<xsl:value-of select="$product" />
</td>
<xsl:for-each select="$day-list">
<xsl:sort order="ascending" select="." />
<xsl:variable name="day" select="." />
<td>
<xsl:value-of
select="sum(//price[../product=$product][../../../dow=$day])"
/> .
</td>
</xsl:for-each>
<td>
<xsl:value-of
select="sum(//price[../product=$product])" /> .
</td>
</tr>
</xsl:for-each>
<tr>
<td><xsl:text> </xsl:text></td>
<xsl:for-each select="$day-list">
<xsl:sort order="ascending" select="." />
<xsl:variable name="day" select="." />
<td>
<xsl:value-of
select="sum(//price[../../../dow=$day])" />
</td>
</xsl:for-each>
<td>
<xsl:value-of select="sum(//price)" />
</td>
</tr>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>