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File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<favorite-books>
<booklist>
<book isbn="1111111111"
favorite="f1">XSLT</book>
<book isbn="2222222222"
favorite="Doug">Java</book>
<book isbn="3333333333"
favorite="Doug">C++</book>
<book isbn="4444444444"
favorite="f1">SQL</book>
<book isbn="5555555555"
favorite="Sheri">Oracle</book>
<book isbn="0375724443"
favorite="Sheri">Java</book>
</booklist>
</favorite-books>
File: Transform.xslt
<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:variable name="Dougs-favorites" as="node()*">
<xsl:sequence
select="/favorite-books/booklist
/book[contains(@favorite, 'Doug')]"/>
</xsl:variable>
<xsl:variable name="Sheris-favorites" as="node()*">
<xsl:sequence
select="/favorite-books/booklist
/book[contains(@favorite, 'Sheri')]"/>
</xsl:variable>
<xsl:template match="/">
<xsl:text>
Books we both like:</xsl:text>
<xsl:text>

 </xsl:text>
<xsl:for-each select="$Dougs-favorites intersect $Sheris-favorites">
<xsl:sort select="."/>
<xsl:value-of select="."/>
<xsl:text>
 </xsl:text>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Output:
Books we both like:
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