属性中具有相同值的XSLT 1.0 count元素,并将其显示

使用XSL键很容易。

<!-- index all <col> elements by their @p2 attribute -->
<xsl:key name="kColByFirstname" match="col" use="@p2" />

<xsl:template match="/RootElement">
  <table>
    <tr>
      <td>p2</td><td>num</td>
    </tr>
    <!-- select the respective first <col> of each group -->
    <xsl:apply-templates select="col[
      generate-id() = generate-id(key('kColByFirstname', @p2)[1])
    ]" />
  </table>
</xsl:template>

<xsl:template match="col">
  <tr>
    <!-- output the current value of @p2 and its group count -->
    <td><xsl:value-of select="@p2"/></td>
    <td><xsl:value-of select="count(key('kColByFirstname', @p2))" /></td>
  </tr>
</xsl:template>