xml - XSL 计数带参数的节点数

Question

我有以下 xml:

 <pax>
     <age>5</age>
 </pax>
  <pax>
     <age>5</age>
 </pax>
  <pax>
     <age>12</age>
 </pax>

以及以下 xslt:

 <xsl:for-each select="paxes/pax">
                <xsl:variable name="PaxAge" select="age"/>
                <COUNT>
                  <xsl:value-of select='count(paxes/pax/age[text()=$PaxAge])'/>
                </COUNT>
   </xsl:for-each>

但是我得到的结果总是

<COUNT>0</COUNT>
<COUNT>0</COUNT>
<COUNT>0</COUNT>

如果我把它改成

<xsl:value-of select='count(paxes/pax/age[text()="5"])'/>

我会收到

<COUNT>2</COUNT>
<COUNT>2</COUNT>
<COUNT>2</COUNT>

输出应该是:

<COUNT>2</COUNT>
<COUNT>1</COUNT>

如何获取每次迭代的写入计数？

Answer 1

假设您正在尝试计算这应该起作用的次数，

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:key name="age" match="/paxes/pax/age" use="." />

<xsl:template match="/">
  <xsl:for-each select="paxes/pax/age[generate-id(.) = generate-id(key('age', .)[1])]">
    <COUNT>

      <!-- optional -->
      <xsl:attribute name="age">
        <xsl:value-of select="."/>
      </xsl:attribute>

      <xsl:value-of select="count(key('age',.))"/>
    </COUNT>
  </xsl:for-each>
</xsl:template>

</xsl:stylesheet>

应该给出一个像这样的 xml:

<COUNT age="5">2</COUNT>
<COUNT age="12">1</COUNT>