XSLT：将属性转换为子元素

Question

我是 XSLT 的新手，虽然将 XML 转换为 HTML 是相当可行的，但我正在努力将 XML 转换为 XML。我想做的事情应该很简单，但我无可救药地卡住了。考虑这个 XML 文件：

<cookbook xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://jg.dhlab.de/Teaching/recipe.xsd"> 
      
    <recipe name="Apple pie">
        <ingredients name='Apples'/>
        <ingredients name='Butter'/>
        <ingredients name="Flour"/>
        <ingredients name="Cinnamon"/>
        <ingredients name="Sugar"/>
        <ingredients name="Eggs"/>
        <instructions>In a small bowl, combine the sugars, flour and spices; set aside. In a large bowl, toss apples with lemon juice. Add sugar mixture; toss to coat. Line a 9-in. pie plate with bottom crust; trim even with edge. Fill with apple mixture; dot with butter. Roll remaining crust to fit top of pie; place over filling. Trim, seal and flute edges. Cut slits in crust.
            Beat egg white until foamy; brush over crust. Sprinkle with sugar. Cover edges loosely with foil. Bake at 375° for 25 minutes. Remove foil and bake until crust is golden brown and filling is bubbly, 20-25 minutes longer. Cool on a wire rack.</instructions>
    </recipe>
</cookbook>

我想将成分元素的名称属性转换为子元素（即同时保留成分元素。我使用的 XSL：

<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" encoding="utf-8"/>
    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*|node()"/>
        </xsl:copy>
    </xsl:template>
    
    <xsl:template match="ingredients">
        <xsl:element name="{name(@name)}">
            <xsl:value-of select="@name"/> 
        </xsl:element>
    </xsl:template>
</xsl:stylesheet>

但是，此 XSL 将 name 属性转换为元素，但覆盖了成分元素。我想要的是以下输出：

<recipe name="Apple pie">
    <ingredients>
        <name>Apples</name>
        <name>Butter</name>
        <name>Flour</name>
        <name>Cinnamon</name>
        <name>Sugar</name>
        <name>Eggs</name>
    </ingredients>
        <instructions>In a small bowl, combine the sugars, flour and spices; set aside. In a large bowl, toss apples with lemon juice. Add sugar mixture; toss to coat. Line a 9-in. pie plate with bottom crust; trim even with edge. Fill with apple mixture; dot with butter. Roll remaining crust to fit top of pie; place over filling. Trim, seal and flute edges. Cut slits in crust.
            Beat egg white until foamy; brush over crust. Sprinkle with sugar. Cover edges loosely with foil. Bake at 375° for 25 minutes. Remove foil and bake until crust is golden brown and filling is bubbly, 20-25 minutes longer. Cool on a wire rack.</instructions>
    </recipe>

谁能告诉我如何实现这一目标以及我做错了什么？

Answer 1

如果您知道要创建name 元素，请在模板中使用<name><xsl:value-of select="@name"/></name> 和match="ingredients"。

创建包装元素使用例如

  <xsl:template match="recipe">
      <xsl:copy>
          <xsl:copy-of select="@*"/>
          <xsl:where-populated>
              <ingredients>
                  <xsl:apply-templates select="ingredients"/>
              </ingredients>
          </xsl:where-populated>
          <xsl:apply-templates select="* except ingredients"/>
      </xsl:copy>
  </xsl:template>
  
  <xsl:template match="ingredients">
      <name>
          <xsl:value-of select="@name"/>
      </name>
  </xsl:template>