subsequence and reverse
File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<favorite-books>
<booklist>
<book isbn="1111111111"
favorite="f1">XSLT</book>
<book isbn="2222222222"
favorite="A">Java</book>
<book isbn="3333333333"
favorite="A">C++</book>
<book isbn="4444444444"
favorite="f1">SQL</book>
<book isbn="5555555555"
favorite="B">Oracle</book>
<book isbn="0375724443"
favorite="B">XML</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="A-List" as="node()*">
<xsl:sequence
select="/favorite-books/booklist
/book[contains(@favorite, 'A')]"/>
</xsl:variable>
<xsl:variable name="B-List" as="node()*">
<xsl:sequence
select="/favorite-books/booklist
/book[contains(@favorite, 'B')]"/>
</xsl:variable>
<xsl:template match="/">
<xsl:value-of
select="if (subsequence($A-List, 1, 1) is
subsequence($B-List, 1, 1))
then ' The first nodes are the same!
'
else ' The first nodes aren''t the same!
'"/>
<xsl:value-of
select="if (subsequence($A-List, 1, 1) is
subsequence(reverse($B-List), 1, 1))
then ' The first nodes are the same!
'
else ' The first nodes aren''t the same!
'"/>
</xsl:template>
</xsl:stylesheet>
Output:
The first nodes aren't the same!
The first nodes aren't the same!
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