发信人: mysunshine()
整理人: leitiger(2001-06-27 15:25:36), 站内信件
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XSLT例子一：联合交叉两个nodesets
使用XSLT元素：xsl:stylesheet xsl:template xsl:variable xsl:value-of
使用XSLT 和 Xpath的函数： count
XML源文件：
<?xml version="1.0"?>
<publisher>
<books>
<book>
<title>Stranger in a strange land</title>
<ISBN>0441788386</ISBN>
<author-ref ref="rh"/>
<sold>230000</sold>
</book>
<book>
<title>Starman Jones</title>
<ISBN>0345328116 </ISBN>
<author-ref ref="rh"/>
<author-ref ref="jldr"/>
<sold>80000</sold>
</book>
<book>
<title>The Space Merchants</title>
<ISBN>02352123456 </ISBN>
<author-ref ref="fp"/>
<author-ref ref="ck"/>
<sold>120000</sold>
</book>
</books>
<authors>
<author id="rh">
<first_name>Robert</first_name>
<last_name>Heinlein</last_name>
</author>
<author id="ck">
<first_name>Cyril</first_name>
<last_name>Kornbluth</last_name>
</author>
<author id="fp">
<first_name>Frederick</first_name>
<last_name>Pohl</last_name>
</author>
<author id="jldr">
<first_name>Judy-Lyn</first_name>
<last_name>Del Rey</last_name>
</author>
</authors>
</publisher>
XSLT代码：
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:variable name="books_by_rh" select="//book[author-ref/@ref='rh']"/>
<xsl:variable name="books_by_more_than_one_author" select="//book[count(author-ref) > 1]"/>
<xsl:template match="/">
Total number of books by Robert Heinlein: <xsl:value-of select="count($books_by_rh)" />
Total number of books by several authors: <xsl:value-of select="count($books_by_more_than_one_author)" />
Number of books in the union of the two sets <xsl:value-of
select="count($books_by_rh|$books_by_more_than_one_author)"/>
Number of books in the intersection of the two sets <xsl:value-of
select="count($books_by_rh[count(.|$books_by_more_than_one_author)=
count($books_by_more_than_one_author)])"/>
</xsl:template>
</xsl:stylesheet>
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