我有以下 XML 输入文件:
<mappings>
<mapping>
<key>6718</key>
<value attribute="content_type">Info Page</value>
</mapping>
<mapping>
<key>35905</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>6718</key>
<value attribute="content_type">Info Page</value>
</mapping>
<mapping>
<key>36941</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>24920</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>40244</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>36639</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>1861</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>2280</key>
<value attribute="content_type">Press releases</value>
</mapping>
<mapping>
<key>42062</key>
<value attribute="content_type">Press releases</value>
</mapping>
</mappings>
我想生成以下 XML:
<reductions>
<reduction>
<group>Info Page</group>
<key>6718</key>
</reduction>
<reduction>
<group>Press releases</group>
<key>35905</key>
<key>36941</key>
<key>24920</key>
<key>40244</key>
<key>36639</key>
<key>1861</key>
<key>2280</key>
<key>42062</key>
</reduction>
</reductions>
因此,输入 XML 中的键需要根据输入 XML 中的值节点的值在输出 XML 中进行分组。还需要删除重复项,输入 XML 包含值为 6718 的键两次,输出 XML 仅一次。
我将 XSLT 2.0 与 Saxon 9 HE 一起使用。
有人可以帮帮我吗?
[编辑]
<?xml version="1.0" encoding="UTF-8"?>
<xsl:transform
version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="xs">
<xsl:template match="/">
<xsl:variable name="mappings">
<mappings>
<xsl:apply-templates select="resource/R"/>
</mappings>
</xsl:variable>
<reductions>
<xsl:apply-templates select="$mappings/*"/>
</reductions>
</xsl:template>
<xsl:template match="R">
<mapping>
<key><xsl:value-of select="MT[@N='content_id']/@V"/></key>
<value>
<xsl:attribute name="attribute">content_type</xsl:attribute>
<xsl:value-of select="MT[@N='content_type']/@V"/>
</value>
</mapping>
<!--mapping>
<key><xsl:value-of select="MT[@N='content_id']/@V"/></key>
<value>
<xsl:attribute name="attribute">modified_timestamp</xsl:attribute>
<xsl:value-of select="format-dateTime(MT[@N='modified_timestamp']/@V, '[Y0001]-[M01]-[D01]')"/>
</value>
</mapping-->
</xsl:template>
<xsl:template match="mapping">
<xsl:for-each-group select="." group-by="value">
<reduction>
<group><xsl:value-of select="current-grouping-key()"/></group>
<xsl:for-each-group select="current-group()/key" group-by=".">
<xsl:copy-of select="."/>
</xsl:for-each-group>
</reduction>
</xsl:for-each-group>
</xsl:template>
</xsl:transform>